GOLDMAN SACHS TRUST
497, 1998-09-03
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<PAGE>
 
- --------------------------------------------------------------------------------
 
PROSPECTUS                       GOLDMAN SACHS
January 1, 1998, as revised
                          ASSET ALLOCATION PORTFOLIOS
September 1, 1998           CLASS A, B AND C SHARES
 
  The Goldman Sachs Asset Allocation Portfolios (the "Portfolios") are
professionally-managed portfolios designed to take advantage of the benefits of
asset allocation. Each Portfolio has a separate objective, which it seeks to
achieve by investing in a number of other Goldman Sachs mutual funds (the
"Underlying Funds").
 
GOLDMAN SACHS INCOME STRATEGY PORTFOLIO
  Seeks a high level of current income with greater stability of principal
  than an investment in equity securities alone.
 
GOLDMAN SACHS GROWTH AND INCOME STRATEGY PORTFOLIO
  Seeks long-term capital appreciation and current income.
 
GOLDMAN SACHS GROWTH STRATEGY PORTFOLIO
  Seeks capital appreciation and secondarily current income.
 
GOLDMAN SACHS AGGRESSIVE GROWTH STRATEGY PORTFOLIO
  Seeks capital appreciation.
 
  Goldman Sachs Asset Management ("GSAM"), New York, New York, a separate
operating division of Goldman, Sachs & Co. ("Goldman Sachs"), serves as
investment adviser to each Portfolio. GSAM and its affiliates also provide
advisory services to the Underlying Funds. GSAM is also referred to in this
Prospectus as the "Investment Adviser." Goldman Sachs serves as the Portfolios'
distributor and transfer agent.
 
SHARES OF THE PORTFOLIOS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR
ENDORSED BY, ANY BANK OR OTHER INSURED DEPOSITORY INSTITUTION AND ARE NOT
INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD
OR ANY OTHER GOVERNMENT AGENCY. AN INVESTMENT IN A PORTFOLIO INVOLVES
INVESTMENT RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
 
  This Prospectus provides information about Goldman Sachs Trust (the "Trust")
and the Portfolios that a prospective investor should understand before
investing. This Prospectus should be retained for future reference. A Statement
of Additional Information (the "Additional Statement"), dated January 1, 1998,
as revised September 1, 1998, containing further information about the Trust
and the Portfolios which may be of interest to investors, has been filed with
the Securities and Exchange Commission ("SEC"), is incorporated herein by
reference in its entirety, and may be obtained without charge from Goldman
Sachs by calling the telephone number, or writing to one of the addresses,
listed on the back cover of this Prospectus. The SEC maintains a Web site
(http://www.sec.gov) that contains the Additional Statement and other
information regarding the Trust.
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
Portfolio Highlights................   2
Fees and Expenses...................   6
Investment Objectives and Policies..   9
Risk Factors and Special
 Considerations.....................  10
Description of Underlying Funds.....  11
Management..........................  19
Expenses............................  22
Reports to Shareholders.............  23
How to Invest.......................  24
Services Available to Shareholders..  30
</TABLE>
<TABLE>
<CAPTION>
                                                                PAGE
                                                                ----
                         <S>                                    <C>
                         Distribution and Service Plans........  33
                         How to Sell Shares of the Portfolios..  34
                         Dividends.............................  35
                         Net Asset Value.......................  36
                         Performance Information...............  36
                         Shares of the Trust...................  37
                         Taxation..............................  38
                         Additional Information................  39
                         Appendix A............................ A-1
                         Appendix B............................ B-1
                         Account Application
</TABLE>
<PAGE>
 
 
                              PORTFOLIO HIGHLIGHTS
 
   The following is intended to highlight certain information and is
 qualified in its entirety by the more detailed information contained in
 this Prospectus.
 
  WHAT IS THE GOLDMAN SACHS TRUST?
 
   The Goldman Sachs Trust is an open-end management investment company
 that offers its shares ("Shares") in several investment portfolios
 (commonly known as mutual funds). Each Portfolio pools the monies of
 investors by selling its Shares to the public and investing these monies
 in a portfolio of securities designed to achieve that Portfolio's stated
 investment objectives.
 
  WHAT ARE THE INVESTMENT OBJECTIVES AND POLICIES OF THE PORTFOLIOS?
 
    Each Portfolio has distinct investment objectives and policies. Each
 Portfolio seeks to achieve its objectives by investing in a combination
 of Underlying Funds for which Goldman Sachs now or in the future acts as
 investment adviser or principal underwriter. Some of these Funds invest
 primarily in fixed-income or money market securities (the "Underlying
 Fixed-Income Funds"); other Funds invest primarily in equity securities
 (the "Underlying Equity Funds"). Investors may choose to invest in one or
 more of the Portfolios based on their personal investment goals, risk
 tolerances and financial circumstances. For a further description of the
 Portfolios' investment objectives and policies, see "Investment
 Objectives and Policies."
 
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
   PORTFOLIO NAMES   INVESTMENT OBJECTIVES               INVESTMENT CRITERIA
  <S>               <C>                      <C>
  ----------------  ------------------------ -------------------------------------------
  GOLDMAN SACHS     High level of current    Under normal conditions, approximately 60%
  INCOME STRATEGY   income with greater      of the Portfolio's total assets will be
  PORTFOLIO         stability of principal   allocated among Underlying Fixed-Income
                    than an investment in    Funds. Allocation to Underlying Equity
                    equity securities alone. Funds is intended to add diversification
                                             and enhance returns, but will also add some
                                             volatility.
- ----------------------------------------------------------------------------------------
  GOLDMAN SACHS     Long-term capital        Under normal conditions, approximately 60%
  GROWTH AND        appreciation and current of the Portfolio's total assets will be
  INCOME STRATEGY   income.                  allocated among Underlying Equity Funds,
  PORTFOLIO                                  which are intended to provide the capital
                                             appreciation component. Allocation to
                                             Underlying Fixed-Income Funds is intended
                                             to provide the income component.
- ----------------------------------------------------------------------------------------
  GOLDMAN SACHS     Capital appreciation and Under normal conditions, approximately 80%
  GROWTH STRATEGY   secondarily current      of the Portfolio's total assets will be
  PORTFOLIO         income.                  allocated among Underlying Equity Funds,
                                             with a blend of domestic large cap, small
                                             cap and international exposure to seek
                                             capital appreciation. Allocation to
                                             Underlying Fixed-Income Funds is to provide
                                             diversification.
- ----------------------------------------------------------------------------------------
  GOLDMAN SACHS     Capital appreciation.    Under normal conditions, substantially all
  AGGRESSIVE                                 of the Portfolio's total assets will be
  GROWTH STRATEGY                            allocated among Underlying Equity Funds,
  PORTFOLIO                                  with a greater focus on small cap and
                                             international investments.
</TABLE>
 
 
 
                                       2
<PAGE>
 
 
  WHAT IS GOLDMAN SACHS ASSET MANAGEMENT'S GLOBAL ASSET ALLOCATION
 PROCESS?
 
   The Quantitative Research Group at GSAM uses disciplined quantitative
 models to determine the relative attractiveness of the world's stock,
 bond and currency markets. GSAM's models use financial and economic
 variables to capture fundamental relationships that it believes make
 sense. While GSAM's process is rigorous and quantitative, it also
 incorporates clear economic reasoning behind each recommendation.
 
   Each Portfolio starts with a "base-line" or strategic allocation among
 the various asset classes. GSAM will then tactically deviate from the
 strategic allocations based on forecasts provided by the models. The
 tactical process seeks to add value by overweighting attractive markets
 and underweighting unattractive markets. Greater deviations from the
 strategic allocations of a given portfolio result in higher risk that the
 tactical allocation will underperform the strategic allocation. However,
 GSAM's risk control process balances the amount any asset class can be
 overweighted or underweighted in seeking to achieve higher expected
 returns against the amount of risk imposed by that deviation from the
 strategic allocation. GSAM employs Goldman, Sachs & Co.'s proprietary
 Black-Litterman asset allocation technique in an effort to optimally
 balance these two goals. This technique combines the Quantitative
 Research Group's market forecasts with economic equilibrium in seeking to
 construct risk-controlled portfolios.
 
  WHAT ARE THE RISK FACTORS AND SPECIAL CHARACTERISTICS THAT I SHOULD
 CONSIDER BEFORE INVESTING?
 
   The Portfolios are intended as an efficient and cost-effective method
 of giving investors access to four different portfolio mixes. The
 risk/return balance of each Portfolio is varied by the proportion of
 assets allocated to the different kinds of investments. For example, the
 Aggressive Growth Strategy Portfolio intends to invest substantially all
 of its assets in Underlying Funds that invest in equity securities. An
 investor seeking capital appreciation potential, with a longer time
 horizon and a tolerance for volatility, might choose this Portfolio.
 Conversely, an investor seeking a balance of income and growth, with a
 shorter time horizon and less tolerance for volatility, might choose the
 Income Strategy Portfolio or Growth and Income Strategy Portfolio, which
 invest a larger portion of their assets in Underlying Funds that invest
 in fixed income securities.
 
   Because the assets of each Portfolio are invested in Underlying Funds,
 each Portfolio's investment performance is directly related to the
 investment performance of the Underlying Funds held by it. The ability of
 a Portfolio to meet its investment objective is, therefore, also directly
 related to the ability of the Underlying Funds held to meet their
 objectives, as well as the allocation among those Underlying Funds by the
 Investment Adviser.
 
   The value of the Underlying Funds' investments, and the net asset
 values ("NAV") of the Shares of both the Underlying Funds and the
 Portfolios, will fluctuate in response to changes in market and economic
 conditions, as well as the financial condition and prospects of issuers
 in which the Underlying Funds invest. An Underlying Fund's use of certain
 investment techniques, including derivatives, forward contracts, options
 and futures, will subject the Fund to greater risk than funds that do not
 employ such techniques. In addition, investments by certain Underlying
 Funds in foreign issuers, currencies, real estate investment trusts and
 small market capitalization companies will expose those Funds to a higher
 degree of risk and price volatility. These investments include securities
 of issuers located in countries in Asia, Latin America, Eastern Europe
 and Africa whose economies or securities markets are considered not to be
 fully developed ("Emerging Countries"). Some Underlying Funds may also
 invest in non-investment grade fixed-income securities
 
                                       3
<PAGE>
 
(commonly referred to as "junk bonds"), which are considered to be speculative
by traditional investment standards.
 
  An investor in the Portfolios should realize that investments in the
Underlying Funds can be made directly. By investing in the Underlying Funds
indirectly through the Portfolios, an investor will incur not only a
proportionate share of the expenses of the Underlying Funds (including
operating costs and investment management fees), but also expenses of the
Portfolios. While the Portfolios offer a greater level of diversification than
many other types of mutual funds, a single Portfolio may not provide a complete
investment program for an investor.
 
  For a further description of the risks involved in an investment in the
Portfolios and the Underlying Funds, see "Risk Factors and Special
Considerations" and Appendix A to this Prospectus.
 
 WHO MANAGES THE PORTFOLIOS?
 
  Goldman Sachs Asset Management serves as Investment Adviser to the Portfolios
and, except as noted, to each Underlying Fund. Goldman Sachs Funds Management,
L.P. serves as investment adviser to the CORE U.S. Equity, Capital Growth,
Adjustable Rate Government and Short Duration Government Funds. Goldman Sachs
Asset Management International serves as investment adviser to the
International Equity, Japanese Equity, International Small Cap, Emerging
Markets Equity, Asia Growth and Global Income Funds. As of July 24, 1998, the
Investment Adviser, together with its affiliates, acted as investment adviser
or distributor for assets in excess of $168 billion.
 
 WHO DISTRIBUTES THE PORTFOLIOS' SHARES?
 
 
  Goldman Sachs acts as distributor of each Portfolio's Shares (the
"Distributor").
 
 WHAT IS THE MINIMUM INVESTMENT?
 
 
<TABLE>
<CAPTION>
                                                                 MINIMUM
                                                           --------------------
                                                           INITIAL
                                                           PURCHASE ADDITIONAL
TYPE OF PURCHASE                                            AMOUNT  INVESTMENTS
- ----------------                                           -------- -----------
<S>                                                        <C>      <C>
Regular Purchases.........................................  $1,000      $50
Tax-Sheltered Retirement Plans (excluding SIMPLE IRAs and
 Education IRAs) and UGMA/UTMA Purchases..................  $  250      $50
SIMPLE IRAs and Education IRAs............................  $   50      $50
Automatic Investment Plan.................................  $   50      $50
403(b) Plans..............................................  $  200      $50
</TABLE>
 
  For further information, see "How to Invest--How to Buy Shares of the
Portfolios" on page 25.
 
 HOW DO I PURCHASE SHARES?
 
  You may purchase Shares of the Portfolios through Goldman Sachs and
certain investment dealers, including members of the National Association of
Securities Dealers, Inc. (the "NASD") and certain other financial service
firms that have agreements with Goldman Sachs relating to the sale of Shares
("Authorized Dealers"). See "How to Invest" on page 24.
 
                                       4
<PAGE>
 
 
 WHAT ARE MY PURCHASE ALTERNATIVES?
 
  The Portfolios offer three classes of Shares through this Prospectus. These
shares may be purchased at the investor's choice, at a price equal to their
next determined NAV (i) plus an initial sales charge imposed at the time of
purchase ("Class A Shares"), (ii) with a contingent deferred sales charge
("CDSC") imposed on redemptions within six years of purchase ("Class B Shares")
or (iii) without any initial sales charge or CDSC, as long as Shares are held
for one year or more ("Class C Shares"). Direct purchases of $1 million or more
of Class A Shares will be sold without an initial sales charge and may be
subject to a CDSC at the time of certain redemptions.
 
<TABLE>
<CAPTION>
                            MAXIMUM INITIAL                   MAXIMUM CONTINGENT
   ALL FUNDS                 SALES CHARGE                   DEFERRED SALES CHARGE
   ---------                ---------------                 ---------------------
   <S>                      <C>             <C>
   Class A.................      5.5%                            (See above)
   Class B.................       N/A                 5% declining to 0% after six years
   Class C.................       N/A       1% if shares are redeemed within 12 months of purchase
</TABLE>
 
  Over time, the CDSC and distribution and service fees attributable to Class B
or Class C Shares will exceed the initial sales charge and the distribution and
service fees attributable to Class A Shares. Class B Shares convert to Class A
Shares, which are subject to lower distribution and service fees, eight years
after initial purchase. Class C Shares, which are subject to the same
distribution and service fees as Class B Shares, do not convert to Class A
Shares and are subject to the higher distribution and service fees
indefinitely. See "How to Invest--Alternative Purchase Arrangements" on page
24.
 
 HOW DO I SELL MY SHARES?
 
  You may redeem Shares upon request on any Business Day, as defined under
"Additional Information," at the NAV next determined after receipt of such
request in proper form, subject to any applicable CDSC sales charge. See "How
to Sell Shares of the Portfolios."
 HOW DO I RECEIVE DIVIDENDS AND DISTRIBUTIONS?
 
<TABLE>
<CAPTION>
                                       INVESTMENT INCOME DIVIDENDS CAPITAL GAINS
PORTFOLIO                                   DECLARED AND PAID      DISTRIBUTIONS
- ---------                              --------------------------- -------------
<S>                                    <C>                         <C>
Income Strategy.......................            Monthly            Annually
Growth and Income Strategy............          Quarterly            Annually
Growth Strategy.......................          Quarterly            Annually
Aggressive Growth Strategy............           Annually            Annually
</TABLE>
 
  You may receive dividends and distributions in additional Shares of the same
Class of the Portfolio in which you have invested or you may elect to receive
them in cash, Shares of the same Class of other mutual funds sponsored by
Goldman Sachs (the "Goldman Sachs Funds") or ILA Service Units of the Prime
Obligations Portfolio or the Tax-Exempt Diversified Portfolio, if you hold
Class A Shares of a Portfolio, or ILA Class B or Class C Units of the Prime
Obligations Portfolio, if you hold Class B or Class C Shares of a Portfolio
(the "ILA Portfolios"). For further information concerning dividends and
distributions, see "Dividends."
 
                                       5
<PAGE>
 
 
                               FEES AND EXPENSES
                           (CLASS A, B AND C SHARES)
 
<TABLE>
<CAPTION>
                                                              GROWTH AND
                           INCOME STRATEGY                  INCOME STRATEGY                  GROWTH STRATEGY
                              PORTFOLIO                        PORTFOLIO                        PORTFOLIO
                       -----------------------------    -----------------------------    -----------------------------
                       CLASS A    CLASS B    CLASS C    CLASS A    CLASS B    CLASS C    CLASS A    CLASS B    CLASS C
                       -------    -------    -------    -------    -------    -------    -------    -------    -------
<S>                    <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
SHAREHOLDER TRANSACTION EXPENSES:
 Maximum Sales Charge
  Imposed on
  Purchases..........    5.5%/1/   None       None        5.5%/1/   None       None        5.5%/1/   None       None
 Maximum Sales Charge
  Imposed on
  Reinvested
  Dividends..........   None       None       None       None       None       None       None       None       None
 Maximum Deferred
  Sales Charge.......   None/1/     5.0%/2/    1.0%/3/   None/1/     5.0%/2/    1.0%/3/   None/1/     5.0%/2/    1.0%/3/
 Redemption Fees/4/..   None       None       None       None       None       None       None       None       None
 Exchange Fees/4/....   None       None       None       None       None       None       None       None       None
ANNUAL FUND OPERATING
 EXPENSES:
 (as a percentage of
  average daily net
  assets)/5/
 Management Fees (for
  asset allocation)
  (after applicable
  limitations)/6/....   0.15%      0.15%      0.15%      0.15%      0.15%      0.15%      0.15%      0.15%      0.15%
 Distribution and
  Service Fees.......   0.25%      1.00%      1.00%      0.25%      1.00%      1.00%      0.25%      1.00%      1.00%
                        ----       ----       ----       ----       ----       ----       ----       ----       ----
Other Expenses:
 Other Expenses
  (after applicable
  limitations)/7/....   0.19%      0.19%      0.19%      0.19%      0.19%      0.19%      0.19%      0.19%      0.19%
Underlying Fund
 Expenses/5/.........   0.69%      0.69%      0.69%      0.79%      0.79%      0.79%      0.84%      0.84%      0.84%
                        ----       ----       ----       ----       ----       ----       ----       ----       ----
TOTAL FUND OPERATING
 EXPENSES............   1.28%      2.03%      2.03%      1.38%      2.13%      2.13%      1.43%      2.18%      2.18%
                        ====       ====       ====       ====       ====       ====       ====       ====       ====
<CAPTION>
                             AGGRESSIVE
                           GROWTH STRATEGY
                              PORTFOLIO
                       --------------------------------
                       CLASS A    CLASS B    CLASS C
                       ---------- ---------- ----------
<S>                    <C>        <C>        <C>
SHAREHOLDER TRANSACTION EXPENSES:
 Maximum Sales Charge
  Imposed on
  Purchases..........    5.5%/1/   None       None
 Maximum Sales Charge
  Imposed on
  Reinvested
  Dividends..........   None       None       None
 Maximum Deferred
  Sales Charge.......   None/1/     5.0%/2/    1.0%/3/
 Redemption Fees/4/..   None       None       None
 Exchange Fees/4/....   None       None       None
ANNUAL FUND OPERATING
 EXPENSES:
 (as a percentage of
  average daily net
  assets)/5/
 Management Fees (for
  asset allocation)
  (after applicable
  limitations)/6/....   0.15%      0.15%      0.15%
 Distribution and
  Service Fees.......   0.25%      1.00%      1.00%
                       ---------- ---------- ----------
Other Expenses:
 Other Expenses
  (after applicable
  limitations)/7/....   0.19%      0.19%      0.19%
Underlying Fund
 Expenses/5/.........   0.90%      0.90%      0.90%
                       ---------- ---------- ----------
TOTAL FUND OPERATING
 EXPENSES............   1.49%      2.24%      2.24%
                       ========== ========== ==========
</TABLE>
- ------
/1/As a percentage of the offering price. No sales charge is imposed on
   purchases of Class A shares by certain classes of investors. A CDSC of 1.00%
   is imposed on certain redemptions of Class A shares sold without an initial
   sales charge as part of an investment of $1 million or more. See "How to
   Invest--Offering Price--Class A Shares."
/2/A CDSC is imposed upon shares redeemed within six years of purchase at a
   rate of 5% in the first year, declining to 1% in the sixth year, and
   eliminated thereafter. See "How to Invest--Offering Price--Class B Shares."
/3/A CDSC of 1.00% is imposed on shares redeemed within 12 months of purchase.
   See "How to Invest--Offering Price--Class C Shares."
/4/A transaction fee of $7.50 may be charged for redemption proceeds paid by
   wire. In addition to free reinvestments of dividends and distributions in
   shares of other Goldman Sachs Funds or units of the ILA Portfolios and free
   automatic exchanges pursuant to the Automatic Exchange Program, six free
   exchanges are permitted in each twelve month period. A fee of $12.50 may be
   charged for each subsequent exchange during such period. See "How to
   Invest--Exchange Privilege."
/5/The Portfolio's annual operating expenses have been restated to reflect fees
   and expenses in effect as of September 1, 1998. Underlying Fund expenses for
   each Portfolio are based upon the strategic allocation of each Portfolio's
   investment in the Underlying Funds and upon the total operating expenses of
   the Underlying Funds as in effect on September 1, 1998. Actual Underlying
   Fund expenses incurred by each Portfolio may vary with changes in the
   allocation of each Portfolio's assets among the Underlying Funds and with
   other events that directly affect the expenses of the Underlying Funds. For
   additional information on the total operating expenses of each Underlying
   Fund, please refer to "Expenses."
/6/The Investment Adviser has voluntarily agreed that a portion of the
   management fees would not be imposed on the Portfolios equal to 0.20%.
   Without such limitation, management fees would be 0.35% of each Portfolio's
   average daily net assets.
/7/The Investment Adviser has voluntarily agreed to reduce or limit certain
   other expenses (excluding asset allocation, distribution and service fees,
   transfer agency fees (equal to 0.19% of the average daily net assets of each
   Fund's Class A, B and C Shares), taxes, interest, brokerage fees,
   litigation, indemnification and other extraordinary expenses) for each
   Portfolio to the extent such expenses exceed 0.00% of the Portfolio's
   average daily net assets.
/8/Without the limitations described above, "Other Expenses" and "Total
   Operating Expenses" of the Portfolios would be as set forth below:
 
<TABLE>
<CAPTION>
                                                    GROWTH AND                                      AGGRESSIVE
                          INCOME STRATEGY         INCOME STRATEGY         GROWTH STRATEGY         GROWTH STRATEGY
                             PORTFOLIO               PORTFOLIO               PORTFOLIO               PORTFOLIO
                      ----------------------- ----------------------- ----------------------- -----------------------
                      CLASS A CLASS B CLASS C CLASS A CLASS B CLASS C CLASS A CLASS B CLASS C CLASS A CLASS B CLASS C
                      ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- ------- -------
   <S>                <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>     <C>
    Other Expenses...  0.55%   0.55%   0.55%   0.32%   0.32%   0.32%   0.35%   0.35%   0.35%   0.48%   0.48%   0.48%
    Total Operating
     Expenses........  1.84%   2.59%   2.59%   1.71%   2.46%   2.46%   1.79%   2.54%   2.54%   1.98%   2.73%   2.73%
</TABLE>
 
                                       6
<PAGE>
 
  The Portfolios will invest only in Institutional Shares of the Underlying
Funds and, accordingly, will not pay any sales load or distribution or service
fees in connection with their investments in Shares of the Underlying Funds.
The Portfolios will, however, indirectly bear their pro rata share of the fees
and expenses incurred by the Underlying Funds that are applicable to
Institutional Shareholders. The following example assumes the payment by each
Portfolio of operating expenses at the levels set forth in the table above and
of its pro rata share of the Institutional Share expenses of the Underlying
Funds (also as set forth above) in which a Portfolio is invested.
 
EXAMPLE
 
  You would pay the following expenses on a hypothetical $1,000 investment,
assuming (1) a 5% annual return; and (2) redemption at the end of each time
period:
 
<TABLE>
<CAPTION>
                                                                  1 YEAR 3 YEARS
                                                                  ------ -------
<S>                                                               <C>    <C>
Income Strategy Portfolio
 Class A Shares.................................................   $67    $ 93
 Class B Shares
 --Assuming complete redemption at end of period................   $71    $ 94
 --Assuming no redemption.......................................   $21    $ 64
 Class C Shares
 --Assuming complete redemption at end of period................   $31    $ 64
 --Assuming no redemption.......................................   $21    $ 64
Growth and Income Strategy Portfolio
 Class A Shares.................................................   $68    $ 96
 Class B Shares
 --Assuming complete redemption at end of period................   $72    $ 97
 --Assuming no redemption.......................................   $22    $ 67
 Class C Shares
 --Assuming complete redemption at end of period................   $32    $ 67
 --Assuming no redemption.......................................   $22    $ 67
Growth Strategy Portfolio
 Class A Shares.................................................   $69    $ 98
 Class B Shares
 --Assuming complete redemption at end of period................   $72    $ 98
 --Assuming no redemption.......................................   $22    $ 68
 Class C Shares
 --Assuming complete redemption at end of period................   $32    $ 68
 --Assuming no redemption.......................................   $22    $ 68
Aggressive Growth Strategy Portfolio
 Class A Shares.................................................   $69    $100
 Class B Shares
 --Assuming complete redemption at end of period................   $73    $100
 --Assuming no redemption.......................................   $23    $ 70
 Class C Shares
 --Assuming complete redemption at end of period................   $33    $ 70
 --Assuming no redemption.......................................   $23    $ 70
</TABLE>
 
  The hypothetical example above assumes that a CDSC will not apply to
redemptions of Class A Shares within the first 18 months.
 
  The Investment Adviser and Goldman Sachs may modify or discontinue any of
the limitations set forth above in the future at their discretion. The
information set forth in the foregoing table and hypothetical example relates
only to Class A, B and C Shares. Each Portfolio also offers Institutional and
Service Shares, which are
 
                                       7
<PAGE>
 
subject to different fees and expenses (which affect performance), have
different minimum investment requirements and are entitled to different
services than Class A, B and C Shares. Information regarding Institutional and
Service Shares of the Portfolios may be obtained from your sales
representative or from Goldman Sachs by calling the number on the back cover
page of this Prospectus. Because of the Distribution and Service Plans, long-
term shareholders may pay more than the economic equivalent of the maximum
front-end sales charges permitted by the NASD's rules regarding investment
companies.
 
  In addition to the compensation itemized above, certain institutions that
sell Portfolio Shares and/or their salespersons may receive other compensation
in connection with the sale and distribution of Class A, Class B and Class C
Shares of the Portfolios or for services to their customers' accounts and/or
the Portfolios. For additional information regarding such compensation, see
"Management" and "Services Available to Shareholders" in this Prospectus and
"Other Information Regarding Purchases, Redemptions, Exchanges and Dividends"
in the Additional Statement.
 
  The purpose of the foregoing tables is to assist investors in understanding
the various fees and expenses of a Portfolio that an investor will bear
directly or indirectly. As stated, the information on the fees and expenses
included in the tables and hypothetical example above is based on each
Portfolio's fees and estimated expenses and allocation among the Underlying
Funds, and should not be considered as representative of past or future
expenses. Actual fees and expenses may be more or less than those indicated.
Moreover, while the example assumes a 5% annual return, a Portfolio's actual
performance will vary and may result in an actual return more or less than 5%.
See "Management--Investment Adviser."
 
                                       8
<PAGE>
 
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
  The four Portfolios described in this Prospectus are intended for investors
who prefer to have their asset allocation decisions made by professional money
managers. Each Portfolio seeks to achieve its investment objective by
investing within specified equity and fixed-income ranges among Underlying
Funds having different combinations of investments and different degrees of
potential investment risk and reward. An investor should choose a Portfolio
based on personal objectives, investment time horizon, tolerance for risk and
personal financial circumstances.
 
  The Income Strategy Portfolio's investment objective is to seek a high level
of current income with greater stability of principal than an investment in
equity securities alone. The Growth and Income Strategy Portfolio's investment
objective is to seek long-term capital appreciation and current income. The
Growth Strategy Portfolio's investment objective is to seek capital
appreciation and secondarily current income. The Aggressive Growth Strategy
Portfolio's investment objective is to seek capital appreciation. There can be
no assurance that any Portfolio's investment objective will be achieved.
 
  In managing the Portfolios, the Investment Adviser will seek to maintain
different allocations among the Underlying Equity Funds and the Underlying
Fixed-Income Funds depending on a Portfolio's investment objective. The tables
below illustrate the initial Underlying Equity/Fixed-Income Fund allocation
targets and ranges for each Portfolio:
 
     EQUITY/FIXED-INCOME RANGE (PERCENTAGE OF EACH PORTFOLIO'S NET ASSETS)
 
<TABLE>
<CAPTION>
    NAME OF PORTFOLIO                                            TARGET  RANGE
    -----------------                                            ------ --------
<S>                                                              <C>    <C>
Income Strategy Portfolio
  Equity........................................................   40%   20%-60%
  Fixed-Income..................................................   60%   40%-80%
Growth and Income Strategy Portfolio
  Equity........................................................   60%   40%-80%
  Fixed-Income..................................................   40%   20%-60%
Growth Strategy Portfolio
  Equity........................................................   80%  60%-100%
  Fixed-Income..................................................   20%    0%-40%
Aggressive Growth Strategy Portfolio
  Equity........................................................  100%  75%-100%
  Fixed-Income..................................................    0%    0%-25%
</TABLE>
 
  The Investment Adviser will invest in particular Underlying Funds based on
various criteria. Among other things, the Investment Adviser will analyze the
Underlying Funds' respective investment objectives, policies and investment
strategies in order to determine which Underlying Funds, in combination with
other Underlying Funds, are appropriate in light of a Portfolio's investment
objectives.
 
  Each Portfolio is authorized to invest in any or all of the Underlying
Funds. However, it is expected that a Portfolio will normally be invested in
only some of the Underlying Funds at any particular time. A Portfolio's
investment in any of the Underlying Funds may and, in some cases is expected
to, exceed 25% of its total assets.
 
                                       9
<PAGE>
 
For example, the Growth Strategy and Aggressive Growth Strategy Portfolios are
each expected to invest initially more than 25% of their assets in the Growth
& Income Fund described below. Similarly, it is expected that the Aggressive
Growth Strategy and Income Strategy Portfolios will invest more than 25% of
their assets in the CORE International and Short Duration Government Funds,
respectively. The Investment Adviser also expects that each Portfolio (in
addition to those listed above) will initially invest a relatively significant
percentage of its equity allocation in the Growth & Income, CORE Large Cap
Growth and CORE International Equity Funds; that the Growth and Income
Strategy Portfolio will invest a relatively significant percentage of its
assets in the Core Fixed Income and Global Income Funds; and that the Income
Strategy Portfolio will invest a relatively significant percentage of its
assets in the Global Income Fund. THE PARTICULAR UNDERLYING FUNDS IN WHICH
EACH PORTFOLIO MAY INVEST, THE EQUITY/FIXED-INCOME FUND TARGETS AND RANGES AND
THE INVESTMENTS IN EACH UNDERLYING FUND MAY BE CHANGED FROM TIME TO TIME
WITHOUT SEEKING THE APPROVAL OF THE PORTFOLIO'S SHAREHOLDERS.
 
  Changes in the NAVs of the Underlying Funds will affect a Portfolio's NAV.
Because each Portfolio invests primarily in other mutual funds, which
fluctuate in value, the Portfolios' Shares will correspondingly fluctuate in
value. Although the Portfolios normally seek to remain substantially invested
in the Underlying Funds, a Portfolio may invest a portion of its assets in
high quality, short-term debt obligations to maintain liquidity in order to
meet shareholder redemptions and other short-term cash needs. These
obligations may include commercial paper, certificates of deposit, bankers'
acceptances, repurchase agreements, debt obligations backed by the full faith
and credit of the U.S. Government and demand and time deposits of domestic and
foreign banks and savings and loan associations. There may be times when, in
the opinion of the Investment Adviser, abnormal market or economic conditions
warrant that, for temporary defensive purposes, a Portfolio invest without
limitation in short-term obligations. A Portfolio may also borrow money for
temporary or emergency purposes.
 
  Each Portfolio's turnover rate is expected not to exceed 50% annually. A
Portfolio may purchase or sell securities to: (a) accommodate purchases and
sales of its Shares; (b) change the percentages of its assets invested in each
of the Underlying Funds in response to economic or market conditions; and (c)
maintain or modify the allocation of its assets among the Underlying Funds
within the percentage ranges described above.
 
  Each Portfolio is subject to certain investment restrictions that are
described in detail under "Investment Restrictions" in the Additional
Statement. Fundamental investment restrictions of a Portfolio cannot be
changed without approval of a majority of the outstanding Shares of that
Portfolio. Each Portfolio's investment objectives and all policies not
specifically designated as fundamental are non-fundamental and may be changed
without shareholder approval. If there is a change in a Portfolio's investment
objective, shareholders should consider whether that Portfolio remains an
appropriate investment in light of their then current financial positions and
needs.
 
  For information about the investment objectives of the Underlying Funds and
their investment securities, techniques and risks, see "Description of the
Underlying Funds" and Appendix A in this Prospectus, the Additional Statement
and the prospectus for each of the Underlying Funds.
 
 
                    RISK FACTORS AND SPECIAL CONSIDERATIONS
 
INVESTING IN UNDERLYING FUNDS
 
  The investments of each Portfolio are concentrated in the Underlying Funds,
and each Portfolio's investment performance is directly related to the
investment performance of the Underlying Funds held by it. The ability of
 
                                      10
<PAGE>
 
each Portfolio to meet its investment objectives is directly related to the
ability of the Underlying Funds to meet their objectives as well as the
allocation among those Underlying Funds by the Investment Adviser. The share
prices and yields of both the Portfolios and the Underlying Funds will
fluctuate in response to various market and economic factors related to the
equity and fixed-income markets. There can be no assurance that the investment
objectives of any Portfolio or any Underlying Fund will be achieved.
 
INVESTMENTS OF THE UNDERLYING FUNDS
 
  Because each Portfolio invests in the Underlying Funds, shareholders of each
Portfolio will be affected by the investment policies of the Underlying Funds
in direct proportion to the amount of assets each Portfolio allocates to those
Funds. Each Portfolio may invest in Underlying Funds that in turn invest in
small capitalization companies and foreign issuers and thus are subject to
additional risks, including changes in foreign currency exchange rates and
political risk. Foreign investments may include securities of issuers located
in Emerging Countries in Asia, Latin America, Eastern Europe and Africa. Each
Portfolio may also invest in Underlying Funds that in turn invest in non-
investment grade fixed-income securities ("junk bonds"), which are considered
speculative by traditional standards. In addition, the Underlying Funds may
purchase derivative securities; enter into forward currency transactions; lend
their portfolio securities; enter into futures contracts and options
transactions; purchase zero coupon bonds and payment-in-kind bonds; purchase
securities issued by real estate investment trusts and other issuers in the
real estate industry; purchase restricted and illiquid securities; enter into
forward roll transactions; purchase securities on a when-issued or delayed
delivery basis; enter into repurchase agreements; borrow money; and engage in
various other investment practices. The risks presented by these investment
practices are discussed in Appendix A to this Prospectus, the Additional
Statement and the prospectus for each of the Underlying Funds.
 
AFFILIATED PERSONS
 
  In managing the Portfolios, the Investment Adviser will have the authority
to select and substitute Underlying Funds. The Investment Adviser is subject
to conflicts of interest in allocating Portfolio assets among the various
Underlying Funds both because the fees payable to it and/or its affiliates by
some Underlying Funds are higher than the fees payable by other Underlying
Funds and because the Investment Adviser and its affiliates are also
responsible for managing the Underlying Funds. The Trustees and officers of
the Trust may also have conflicting interests in fulfilling their fiduciary
duties to both the Portfolios and the Underlying Funds.
 
EXPENSES
 
  An investor in a Portfolio should realize that investments in the Underlying
Funds can be made directly. By investing in the Underlying Funds indirectly
through a Portfolio, an investor will incur not only a proportionate share of
the expenses of the Underlying Funds held by the Portfolio (including
operating costs and investment management fees), but also expenses of the
Portfolio.
 
 
                        DESCRIPTION OF UNDERLYING FUNDS
 
  The following is a concise description of the investment objectives and
practices for each of the Underlying Funds that are available for investment
by the Portfolios as of the date of the Prospectus. A Portfolio may also
invest in other Underlying Funds that may become available for investment in
the future at the discretion of the
 
                                      11
<PAGE>
 
Investment Adviser without shareholder approval. There can be no assurance that
the investment objectives of the Underlying Funds will be met. Additional
information regarding the investment practices of the Underlying Funds is
located in Appendix A to this Prospectus, in the Additional Statement and in
the prospectus of each of the Underlying Funds. No offer is made in this
Prospectus of any of the Underlying Funds.
 
<TABLE>
<CAPTION>
     FUND NAMES      INVESTMENT OBJECTIVES           INVESTMENT CRITERIA
  ----------------  ------------------------ ----------------------------------
  <C>               <C>                      <S>
  GROWTH AND IN-    Long-term growth of      At least 65% of total assets in
  COME FUND         capital and growth of    equity securities that are
                    income.                  considered to have favorable
                                             prospects for capital appreciation
                                             and/or dividend-paying ability.
- -------------------------------------------------------------------------------
  CORE U.S. EQUITY  Long-term growth of      At least 90% of total assets in
  FUND              capital and dividend     equity securities of U.S. issuers,
                    income.                  including certain foreign issuers
                                             traded in the U.S. The Fund seeks
                                             to achieve its objective through a
                                             broadly diversified portfolio of
                                             large cap and blue chip equity
                                             securities representing all major
                                             sectors of the U.S. economy. The
                                             Fund's investments are selected
                                             using both a variety of
                                             quantitative techniques and
                                             fundamental research in seeking to
                                             maximize the Fund's expected
                                             return, while maintaining risk,
                                             style, capitalization and industry
                                             characteristics similar to the S&P
                                             500 Index.
- -------------------------------------------------------------------------------
  CORE LARGE CAP    Long-term growth of      At least 90% of total assets in
  GROWTH FUND       capital. Dividend income equity securities of U.S issuers,
                    is a secondary           including certain foreign issuers
                    consideration.           traded in the U.S. The Fund seeks
                                             to achieve its objective through a
                                             broadly diversified portfolio of
                                             equity securities of large cap
                                             U.S. issuers that are expected to
                                             have better prospects for earnings
                                             growth than the growth rate of the
                                             general domestic economy. The
                                             Fund's investments are selected
                                             using both a variety of
                                             quantitative techniques and
                                             fundamental research in seeking to
                                             maximize the Fund's expected
                                             return, while maintaining risk,
                                             style, capitalization and industry
                                             characteristics similar to the
                                             Russell 1000 Growth Index.
- -------------------------------------------------------------------------------
  CORE SMALL CAP    Long-term growth of      At least 90% of total assets in
  EQUITY FUND       capital.                 equity securities of U.S. issuers,
                                             including certain foreign issuers
                                             traded in the U.S. The Fund seeks
                                             to achieve its investment
                                             objective through a broadly
                                             diversified portfolio of equity
                                             securities of U.S. issuers which
                                             are included in the Russell 2000
                                             Index at the time of investment.
                                             The Fund's investments are
                                             selected using both a variety of
                                             quantitative techniques and
                                             fundamental research in seeking to
                                             maximize the Fund's expected
                                             return, while maintaining risk,
                                             style, capitalization and industry
                                             characteristics similar to the
                                             Russell 2000 Index.
- -------------------------------------------------------------------------------
  CORE INTERNA-     Long-term growth of      At least 90% of total assets in
  TIONAL EQUITY     capital.                 equity securities of companies
  FUND                                       organized outside the United
                                             States or whose securities are
                                             principally traded outside the
                                             United States. The Fund seeks
                                             broad representation of large cap
                                             issuers across major countries and
                                             sectors of the international
                                             economy. The Fund's investments
                                             are selected using both a variety
                                             of quantitative techniques and
                                             fundamental research in seeking to
                                             maximize the Fund's expected
                                             return, while maintaining risk,
                                             style, capitalization and industry
                                             characteristics similar to the
                                             unhedged Morgan Stanley Capital
                                             International (MSCI) Europe,
                                             Australasia and Far East Index
                                             (the "EAFE Index"). The Fund may
                                             employ certain currency management
                                             techniques.
</TABLE>
                                                                     (continued)
 
                                       12
<PAGE>
 
<TABLE>
<CAPTION>
     FUND NAMES      INVESTMENT OBJECTIVES           INVESTMENT CRITERIA
  ----------------  ------------------------ ----------------------------------
  <C>               <C>                      <S>
  CAPITAL GROWTH    Long-term capital        At least 90% of total assets in a
  FUND              growth.                  diversified portfolio of equity
                                             securities. Long-term capital
                                             appreciation potential is
                                             considered in selecting
                                             investments.
- -------------------------------------------------------------------------------
  MID CAP EQUITY    Long-term capital        Substantially all, and at least
  FUND              appreciation.            65% of total assets in equity
                                             securities of companies with
                                             public stock market
                                             capitalizations within the range
                                             of the market capitalization of
                                             companies constituting the Russell
                                             Midcap Index at the time of the
                                             investment (currently between $400
                                             million and $16 billion).
- -------------------------------------------------------------------------------
  INTERNATIONAL     Long-term capital        Substantially all, and at least
  EQUITY FUND       appreciation.            65%, of total assets in equity
                                             securities of companies organized
                                             outside the United States or whose
                                             securities are principally traded
                                             outside the United States. The
                                             Fund may employ certain currency
                                             management techniques.
- -------------------------------------------------------------------------------
  SMALL CAP VALUE   Long-term capital        At least 65% of total assets in
  FUND              growth.                  equity securities of companies
                                             with public stock market
                                             capitalizations of $1 billion or
                                             less at the time of investment.
- -------------------------------------------------------------------------------
  EMERGING MARKETS  Long-term capital        Substantially all, and at least
  EQUITY FUND       appreciation.            65%, of total assets in equity
                                             securities of emerging country
                                             issuers. The Fund may employ
                                             certain currency management
                                             techniques.
- -------------------------------------------------------------------------------
  ASIA GROWTH FUND  Long-term capital        Substantially all, and at least
                    appreciation.            65%, of total assets in equity
                                             securities of companies in China,
                                             Hong Kong, India, Indonesia,
                                             Malaysia, Pakistan, the
                                             Philippines, Singapore, South
                                             Korea, Sri Lanka, Taiwan and
                                             Thailand. The Fund may employ
                                             certain currency management
                                             techniques.
- -------------------------------------------------------------------------------
  REAL ESTATE SE-   Total return comprised   Substantially all, and at least
  CURITIES FUND     of long-term growth of   80%, of total assets in a
                    capital and dividend     diversified portfolio of equity
                    income.                  securities of issuers that are
                                             primarily engaged in or related to
                                             the real estate industry. The Fund
                                             expects that a substantial portion
                                             of its total assets will be
                                             invested in real estate investment
                                             trusts ("REITS").
- -------------------------------------------------------------------------------
  JAPANESE EQUITY   Long-term capital        Substantially all, and at least
  FUND              appreciation.            65%, of total assets in equity
                                             securities of Japanese companies.
                                             The Fund may employ certain
                                             currency management techniques.
- -------------------------------------------------------------------------------
  INTERNATIONAL     Long-term capital        Substantially all, and at least
  SMALL CAP FUND    appreciation.            65%, of total assets in equity
                                             securities of companies with
                                             public stock market
                                             capitalizations of $1 billion or
                                             less at the time of investment
                                             that are organized outside the
                                             United States or whose securities
                                             are principally traded outside the
                                             United States. The Fund may employ
                                             certain currency management
                                             techniques.
</TABLE>
 
                                       13
<PAGE>
 
<TABLE>
<CAPTION>
                                                             APPROXIMATE
                                                              INTEREST
                          INVESTMENT       DURATION OR          RATE                          CREDIT         OTHER
      FUND NAMES          OBJECTIVES        MATURITY         SENSITIVITY INVESTMENT SECTOR   QUALITY      INVESTMENTS
- ----------------------  -------------- -------------------   ----------- ----------------- ------------ ---------------
<S>                     <C>            <C>                   <C>         <C>               <C>          <C>
FINANCIAL SQUARE PRIME  Maximize         Maximum Maturity of 3-month     Money market      High Quality N/A
OBLIGATIONS FUND        current income   Individual          bill        instruments       (short-term
                        to the extent    Investments =                   including U.S.    ratings of
                        consistent       13 months at time               Government        A-1, P-1 or
                        with the         of purchase                     Securities, U.S.  comparable
                        maintenance of   Maximum Dollar-                 bank obligations, quality).
                        liquidity.       Weighted Average                commercial paper
                                         Portfolio                       and other short-
                                         Maturity =                      term obligations
                                         90 days                         of U.S.
                                                                         corporations,
                                                                         governmental and
                                                                         other entities,
                                                                         and related
                                                                         repurchase
                                                                         agreements.
- -----------------------------------------------------------------------------------------------------------------------
ADJUSTABLE RATE         A high level     Target Duration =   9-month     At least 65% of   U.S.         Fixed-rate
GOVERNMENT FUND         of current       6-month to 1-year   note        total assets in   Government   mortgage pass-
                        income,          U.S. Treasury                   securities issued Securities   through
                        consistent       Security                        or guaranteed by               securities and
                        with low         Maximum Duration*=              the U.S.                       repurchase
                        volatility of    2 years                         government, its                agreements
                        principal.                                       agencies,                      collateralized
                                                                         instrumentalities              by U.S.
                                                                         or sponsored                   Government
                                                                         enterprises                    Securities.
                                                                         ("U.S. Government
                                                                         Securities") that
                                                                         are adjustable
                                                                         rate mortgage
                                                                         pass-through
                                                                         securities and
                                                                         other mortgage
                                                                         securities with
                                                                         periodic interest
                                                                         rate resets.
- -----------------------------------------------------------------------------------------------------------------------
SHORT DURATION          A high level     Target Duration =   2-year      At least 65% of   U.S.         Mortgage pass-
GOVERNMENT FUND         of current       2-year U.S.         bond        total assets in   Government   through
                        income and       Treasury Security               U.S. Government   Securities   securities and
                        secondarily,     plus or minus .5                Securities and                 other
                        in seeking       years Maximum                   repurchase                     securities
                        current          Duration*= 3 years              agreements                     representing an
                        income, may                                      collateralized by              interest in or
                        also consider                                    such securities.               collateralized
                        the potential                                                                   by mortgage
                        for capital                                                                     loans.
                        appreciation.
- -----------------------------------------------------------------------------------------------------------------------
GOVERNMENT INCOME FUND  A high level     Target Duration =   5-year      At least 65% of   U.S.         Non-government
                        of current       Lehman Brothers     bond        assets in U.S.    Government   mortgage pass-
                        income,          Mutual Fund                     Government        Securities   through
                        consistent       Government/Mortgage             Securities,       and non-U.S. securities,
                        with safety of   Index plus or minus             including         Government   asset-backed
                        principal.       1 year                          mortgage-backed   Securities = securities and
                                         Maximum                         U.S. Government   AAA/Aaa      corporate
                                         Duration*= 6 years              Securities and                 fixed-income
                                                                         repurchase                     securities.
                                                                         agreements
                                                                         collateralized by
                                                                         such securities.
</TABLE>
 
                                       14
<PAGE>
 
<TABLE>
<CAPTION>
                                                      APPROXIMATE
                                                       INTEREST
                          INVESTMENT    DURATION OR      RATE                          CREDIT           OTHER
      FUND NAMES          OBJECTIVES      MATURITY    SENSITIVITY INVESTMENT SECTOR    QUALITY       INVESTMENTS
- ----------------------  -------------- -------------- ----------- ----------------  -------------  ---------------
<S>                     <C>            <C>            <C>         <C>               <C>            <C>
CORE FIXED INCOME FUND  Total return   Target         5-year      At least 65% of   Minimum =      Foreign fixed-
                        consisting of  Duration =     bond        assets in fixed-  BBB/Baa        income,
                        capital        Lehman                     income            Minimum for    municipal and
                        appreciation   Brothers                   securities,       non-dollar     convertible
                        and income     Aggregate Bond             including U.S.    securities =   securities,
                        that exceeds   Index plus or              Government        AA/Aa          foreign
                        the total      minus                      Securities,                      currencies and
                        return of the  1 year                     corporate,                       repurchase
                        Lehman         Maximum                    mortgage-backed                  agreements
                        Brothers       Duration*=  6              and asset-backed                 collateralized
                        Aggregate Bond years                      securities.                      by U.S.
                        Index.                                                                     Government
                                                                                                   Securities.
- ------------------------------------------------------------------------------------------------------------------
GLOBAL INCOME FUND      A high total   Target         6-year      Securities of     Minimum =      Mortgage and
                        return,        Duration =     bond        U.S. and foreign  BBB/Baa        asset-backed
                        emphasizing    J.P. Morgan                governments and   At least       securities,
                        current        Global                     corporations.     50% = AAA/Aaa  foreign
                        income, and,   Government                                                  currencies and
                        to a lesser    Bond Index                                                  repurchase
                        extent,        (hedged) plus                                               agreements
                        providing      or minus 2.5                                                collateralized
                        opportunities  years Maximum                                               by U.S.
                        for capital    Duration*= 7.5                                              Government
                        appreciation.  years                                                       Securities or
                                                                                                   certain foreign
                                                                                                   government
                                                                                                   securities.
- ------------------------------------------------------------------------------------------------------------------
HIGH YIELD FUND         A high level   Target         6-year      Except for        At least       Mortgage-backed
                        of current     Duration =     bond        temporary         65% = BB/Ba    and asset-
                        income and     Lehman                     defensive         or below       backed
                        capital        Brothers High              purposes, at                     securities,
                        appreciation.  Yield Bond                 least 65% of                     U.S. Government
                                       Index plus or              assets in fixed-                 Securities,
                                       minus 2.5                  income                           investment
                                       years                      securities rated                 grade corporate
                                       Maximum                    below investment                 fixed-income
                                       Duration*= 7.5             grade, including                 securities,
                                       years                      U.S. and non-                    structured
                                                                  U.S. dollar                      securities,
                                                                  corporate debt,                  foreign
                                                                  foreign                          currencies and
                                                                  government                       repurchase
                                                                  securities,                      agreements
                                                                  convertible                      collateralized
                                                                  securities and                   by U.S.
                                                                  preferred stock.                 Government
                                                                                                   Securities.
</TABLE>
- -----
* Under normal interest rate conditions.
 
                                       15
<PAGE>
 
  In pursuing their investment objectives and programs, each of the Underlying
Funds is permitted to engage in a wide range of investment policies. The risks
of the Underlying Funds are determined by the nature of the securities held
and the investment strategies used by the Funds' investment advisers. Certain
of these policies are described below and further information about the
investment policies, strategies and risks of the Underlying Funds is contained
in Appendix A to this Prospectus and in the Additional Statement as well as
the prospectuses of the Underlying Funds.
 
UNDERLYING EQUITY FUNDS
  The Underlying Equity Funds may purchase common stocks, preferred stocks,
interests in real estate investment trusts, convertible debt obligations,
convertible preferred stocks, equity interests in trusts, partnerships, joint
ventures, limited liability companies and similar enterprises, warrants and
stock purchase rights ("equity securities"). In choosing securities, a Fund's
investment adviser utilizes first-hand fundamental research, including
visiting company facilities to assess operations and to meet decision-makers.
An investment adviser may also use macro analysis of numerous economic and
valuation variables to anticipate changes in company earnings and the overall
investment climate. The investment advisers are able to draw on the research
and market expertise of the Goldman Sachs Global Investment Research
Department and other affiliates, as well as information provided by other
securities dealers. Equity securities held by an Underlying Fund will
generally be sold when an investment adviser believes that the market price
fully reflects or exceeds the securities' fundamental valuation or when other
more attractive investments are identified.
 
  DOMESTIC VALUE STYLE FUNDS. The Growth and Income, Mid Cap Equity and Small
Cap Value Funds are managed using a value oriented approach. The Funds'
investment adviser evaluates securities using fundamental analysis and intends
to purchase equity securities that are, in its view, underpriced relative to a
combination of such companies' long-term earnings prospects, growth rate, free
cash flow and/or dividend-paying ability.
 
  Consideration will be given to the business quality of the issuer. Factors
positively affecting the investment adviser's view of that quality include the
competitiveness and degree of regulation in the markets in which the company
operates, the existence of a management team with a record of success, the
position of the company in the markets in which it operates, the level of the
company's financial leverage and the sustainable return on capital invested in
the business. The Funds may also purchase securities of companies that have
experienced difficulties and that, in the opinion of the investment adviser,
are available at attractive prices.
 
  DOMESTIC GROWTH STYLE FUND. The Capital Growth Fund is managed using a
growth oriented approach. Equity securities for the Fund are selected based on
their prospects for above average growth. The Fund's investment adviser will
select securities of growth companies trading, in the investment adviser's
opinion, at a reasonable price relative to other industries, competitors and
historical price/earnings multiples. The Fund will generally invest in
companies whose earnings are believed to be in a relatively strong growth
trend, or, to a lesser extent, in companies in which significant further
growth is not anticipated but whose market value per share is thought to be
undervalued.
 
  QUANTITATIVE STYLE FUNDS. The CORE U.S. Equity, CORE Large Cap Growth, CORE
Small Cap Equity and CORE International Equity Funds (the "CORE Equity Funds")
are managed using both quantitative and fundamental techniques. CORE is an
acronym for "Computer-Optimized, Research-Enhanced," which reflects the Funds'
investment process. This investment process and the proprietary multifactor
model used to implement it are discussed below.
 
 
 
                                      16
<PAGE>
 
  Quantitative Investment Process. The Funds' investment advisers begin with a
broad universe of U.S. equity securities for the CORE U.S. Equity, CORE Large
Cap Growth and CORE Small Cap Equity Funds (the "CORE U.S. Equity Funds"), and
a broad universe of foreign equity securities for the CORE International
Equity Fund. The investment advisers use proprietary multifactor models (each
a "Multifactor Model") to forecast the returns of different markets,
currencies and individual securities. In the case of a U.S. equity security
followed by the Goldman Sachs Global Investment Research Department (the
"Research Department"), a rating is assigned based upon the Research
Department's evaluation. In the discretion of the investment adviser, ratings
may also be assigned to U.S. equity securities based on research ratings
obtained from other industry sources. In the case of a foreign equity
security, an investment adviser may rely on research from both the Research
Department and other industry sources.
 
  In building a diversified portfolio for each CORE Equity Fund, an investment
adviser utilizes optimization techniques to seek to maximize the Fund's
expected return, while maintaining a risk profile similar to the Fund's
benchmark. Each portfolio is primarily composed of securities rated highest by
the foregoing investment process and has risk characteristics and industry
weightings similar to the relevant Fund's benchmark.
 
  Quantitative Multifactor Models. The Multifactor Models are rigorous
computerized rating systems for forecasting the returns of different equity
markets, currencies, and individual equity securities according to fundamental
investment characteristics. The CORE U.S. Equity Funds use one Multifactor
Model to forecast the returns of securities held in each Fund's portfolio. The
CORE International Equity Fund uses multiple Multifactor Models to forecast
returns. Currently, the CORE International Equity Fund uses one model to
forecast equity market returns, one model to forecast currency returns and 22
separate models to forecast individual equity security returns in 22 different
countries. Despite this variety, all Multifactor Models incorporate common
variables covering measures of value, growth, momentum and risk (e.g.,
book/price ratio, earnings/price ratio, price momentum, price volatility,
consensus growth forecasts, earnings estimate revisions, earnings stability,
and, in the case of models for the CORE International Equity Fund, currency
momentum and country political risk ratings). All of the factors used in the
Multifactor Models have been shown to significantly impact the performance of
the securities, currencies and markets they were designed to forecast.
 
  The weightings assigned to the factors in the Multifactor Model used by the
CORE U.S. Equity Funds are derived using a statistical formulation that
considers each factor's historical performance in different market
environments. As such, the U.S. Multifactor Model is designed to evaluate each
security using only the factors that are statistically related to returns in
the anticipated market environment. Because they include many disparate
factors, the Funds' investment advisers believe that all the Multifactor
Models are broader in scope and provide a more thorough evaluation than most
conventional, quantitative models. Securities and markets ranked highest by
the relevant Multifactor Model do not have one dominant investment
characteristic; rather, they possess an attractive combination of investment
characteristics.
 
  Research Department. In assigning ratings to equity securities, the Research
Department uses a four category rating system ranging from "recommended for
purchase" to "likely to under perform." The ratings reflect the analyst's
judgment as to the investment results of a specific security and incorporate
economic outlook, valuation, risk and a variety of other factors.
 
  By employing both a quantitative (i.e., the Multifactor Models) and a
qualitative (i.e., research enhanced) method of selecting securities, each
CORE Fund seeks to capitalize on the strengths of each discipline.
 
  ACTIVELY MANAGED INTERNATIONAL FUNDS. The International Equity, Japanese
Equity, International Small Cap, Emerging Markets Equity and Asia Growth Funds
are managed using an active international approach, which utilizes a
consistent process of stock selection undertaken by portfolio management teams
located within
 
                                      17
<PAGE>
 
each of the major investment regions, including Europe, Japan, Asia and the
United States. In selecting securities, the investment adviser uses a long-
term, bottom-up strategy based on first-hand fundamental research that is
designed to give broad exposure to the available opportunities while seeking
to add return primarily through stock selection. Equity securities for these
Funds are evaluated based on three key factors--the business, the management
and the valuation. The investment adviser ordinarily seeks securities that
have, in the investment adviser's opinion, superior earnings growth potential,
sustainable franchise value with management attuned to creating shareholder
value and relatively discounted valuations. In addition, the investment
adviser uses a multi-factor risk model which seeks to assure that deviations
from the benchmark are justifiable.
 
  REAL ESTATE SECURITIES FUND. The investment strategy of the Real Estate
Securities Fund is based on the premise that property market fundamentals are
the primary determinant of growth underlying the success of companies in the
real estate industry. The Fund's research and investment process is designed
to identify those companies with strong property fundamentals and strong
management teams. This process is comprised of real estate market research and
securities analysis. The Fund's investment adviser will take into account
fundamental trends in underlying property markets as determined by proprietary
models, research of local real estate markets, earnings, cash flow growth and
stability, the relationship between asset values and market prices of the
securities and dividend payment history. The investment adviser will attempt
to purchase securities so that its underlying portfolio will be diversified
geographically and by property type.
 
UNDERLYING FIXED-INCOME FUNDS
 
  The investment advisers of the Underlying Fixed-Income Funds may, in
accordance with the respective Funds' investment objectives and policies,
purchase all types of fixed-income securities, including senior and
subordinated corporate debt obligations (such as bonds, debentures, notes and
commercial paper), convertible and non-convertible corporate debt obligations,
loan participations and preferred stock.
 
  As stated above, each Underlying Fixed-Income Fund has policies relating to
its duration (or maturity in the case of the Financial Square Prime
Obligations Fund). A Fund's duration approximates its price sensitivity to
changes in interest rates. Maturity measures the time until final payment is
due; it takes no account of the pattern of a security's cash flows over time.
In computing portfolio duration, an Underlying Fund will estimate the duration
of obligations that are subject to prepayment or redemption by the issuer
taking into account the influence of interest rates on prepayments and coupon
flows. This method of computing duration is known as "option-adjusted"
duration. A Fund will not be limited as to its maximum weighted average
portfolio maturity or the maximum stated maturity with respect to individual
securities unless otherwise noted.
 
  Except for the Financial Square Prime Obligations Fund (which is subject to
more restrictive SEC regulations applicable to money market funds), an
Underlying Fixed-Income Fund will deem a security to have met its minimum
credit rating requirement if the security receives the minimum required long-
term rating (or the equivalent short-term credit rating) at the time of
purchase from at least one rating organization (including, but not limited to,
Standard & Poor's Ratings Group ("S&P") and Moody's Investors Service, Inc.
("Moody's")) even though it has been rated below the minimum rating by one or
more other rating organizations, or, if unrated by a rating organization, is
determined by the Fund's investment adviser to be of comparable quality. If a
security satisfies a Fund's minimum rating criteria at the time of purchase
and is subsequently downgraded below such rating, the Fund will not be
required to dispose of such security. If a downgrade occurs, the Fund's
investment adviser will consider what action, including the sale of such
security, is in the best interest of the Fund and its shareholders.
 
                                      18
<PAGE>
 
  The Underlying Funds may employ certain active management techniques to
manage their duration and term structure, to seek to hedge exposure to foreign
currencies and to seek to enhance returns. These techniques include (with
respect to one or more of the Funds), but are not limited to, the use of
financial futures contracts, option contracts (including options on futures),
forward foreign currency exchange contracts, currency options and futures,
currency, mortgage, credit and interest rate swaps and interest rate floors,
caps and collars. Currency and interest rate management techniques involve
risks different from those associated with investing solely in U.S. dollar-
denominated fixed-income securities of U.S. issuers. Certain of the Funds may
invest in custodial receipts, municipal securities and convertible securities.
The Funds may also employ other investment techniques to seek to enhance
returns, such as lending portfolio securities and entering into mortgage
dollar rolls, repurchase agreements, reverse repurchase agreements and other
investment practices, as described in Appendix A to this Prospectus.
 
 
                                  MANAGEMENT
 
TRUSTEES AND OFFICERS
 
  The Trustees are responsible for deciding matters of general policy and
reviewing the actions of the Investment Adviser, Distributor and transfer
agent. The officers of the Trust conduct and supervise the Portfolios' daily
business operations. The Additional Statement contains information as to the
identity of, and other information about, the Trustees and officers of the
Trust.
 
INVESTMENT ADVISER
 
  INVESTMENT ADVISER. Goldman Sachs Asset Management, One New York Plaza, New
York, New York 10004, a separate operating division of Goldman Sachs, serves
as investment adviser to the each Portfolio and, except as noted, to each
Underlying Fund. Goldman Sachs registered as an investment adviser in 1981.
Goldman Sachs Funds Management, L.P., One New York Plaza, New York, New York
10004, a Delaware limited partnership which is an affiliate of Goldman Sachs,
serves as the investment adviser to the CORE U.S. Equity, Capital Growth,
Adjustable Rate Government and Short Duration Government Funds. Goldman Sachs
Funds Management, L.P. registered as an investment adviser in 1990. Goldman
Sachs Asset Management International, 133 Peterborough Court, London EC4A 2BB,
England, an affiliate of Goldman Sachs, serves as the investment adviser to
the International Equity, Japanese Equity, International Small Cap, Emerging
Markets Equity, Asia Growth and Global Income Funds. Goldman Sachs Asset
Management International became a member of the Investment Management
Regulatory Organization Limited in 1990 and registered as an investment
adviser in 1991. The Goldman Sachs Group, L.P., which controls the Investment
Adviser, has announced that it will pursue an initial public offering of the
firm during the fourth quarter of 1998; if the public offering is consummated,
The Goldman Sachs Group, L.P. will merge into the new public company, which
will be called The Goldman Sachs Group, Inc. As of July 24, 1998, GSAM,
together with its affiliates, acted as investment adviser or distributor for
assets in excess of $168 billion.
 
  Under an Asset Allocation Management Agreement ("Management Agreement") with
each Portfolio, the Investment Adviser, subject to the general supervision of
the Trustees, provides day-to-day advice as to each Portfolio's investment
transactions, including determinations concerning changes to (a) the
Underlying Funds in which the Portfolios may invest and (b) the percentage
range of assets of any Portfolio that may be invested in the Underlying Equity
Funds and the Underlying Fixed-Income Funds as separate groups. Goldman Sachs
has agreed to permit the Portfolios to use the name "Goldman Sachs" or a
derivative thereof as part of each Portfolio's name for as long as a
Portfolio's Management Agreement is in effect.
 
                                      19
<PAGE>
 
  Under the Management Agreement, the Investment Adviser also: (a) supervises
all non-advisory operations of each Portfolio; (b) provides personnel to
perform such executive, administrative and clerical services as are reasonably
necessary to provide effective administration of each Portfolio; (c) at each
Portfolio's expense arranges for (i) the preparation of all required tax
returns, (ii) the preparation and submission of reports to existing
shareholders, (iii) the periodic updating of prospectuses and Additional
Statements and (iv) the preparation of reports to be filed with the SEC and
other regulatory authorities; (d) maintains each Portfolio's records; and (e)
provides office space and all necessary office equipment and services.
 
FUND MANAGERS
 
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                          YEARS PRIMARILY
     NAME AND TITLE         RESPONSIBLE          FIVE YEAR EMPLOYMENT HISTORY
- ------------------------  --------------- -------------------------------------------
<S>                       <C>             <C>
 Mark M. Carhart, Ph.D.,    Since 1998    Mr. Carhart joined the Investment Adviser
 CFA                                      in 1997 as a member of the Quantitative
 Vice President, Co-Head                  Research and Risk Management team. From
 Quantitative                             August 1995 to September 1997, he was
 Research and Senior                      Assistant Professor of Finance at the
 Portfolio Manager                        Marshall School of Business at USC and a
                                          Senior Fellow of the Wharton Financial
                                          Institutions Center.
- -------------------------------------------------------------------------------------
 Raymond J. Iwanowski       Since 1998    Mr. Iwanowski joined the Investment Adviser
 Vice President, Co-Head                  in 1998. Prior to joining the Investment
 Quantitative                             Adviser, he spent three years at Salomon
 Research and Senior                      Brothers, where he was a Vice President and
 Portfolio Manager                        head of the Fixed Derivatives Client
                                          Research group.
- -------------------------------------------------------------------------------------
 Neil Chriss, Ph.D.         Since 1998    Mr. Chriss joined the Investment Adviser in
 Vice President and                       1998. From 1996 to 1998, he worked in the
 Portfolio Manager                        equity division of Morgan Stanley Dean
                                          Witter. From 1994 to 1996, he was a post-
                                          doctoral fellow in the Mathematics
                                          Department of Harvard University.
- -------------------------------------------------------------------------------------
 Georgio DeSantis, Ph.D.    Since 1998    Mr. DeSantis joined the Investment Adviser
 Vice President and                       in 1998. From 1992 to 1998, he was
 Portfolio Manager                        Assistant Professor of Finance and Business
                                          Economics at the Marshall School of
                                          Business at USC.
- -------------------------------------------------------------------------------------
 William J. Fallon,         Since 1998    Mr. Fallon joined the Investment Adviser in
 Ph.D.                                    1998. From 1996 to 1998, he worked in the
 Vice President and                       Firmwide Risk Group of Goldman, Sachs & Co.
 Portfolio Manager                        From 1991 to 1996, he attended Columbia
                                          University, where he earned a Ph.D. in
                                          Finance.
- -------------------------------------------------------------------------------------
 Guang-Liang He, Ph.D.      Since 1998    Mr. He joined the Investment Adviser in
 Vice President and                       1998. In 1997, he worked in the Firmwide
 Portfolio Manager                        Risk Group of Goldman, Sachs & Co. From
                                          1992 to 1997, he worked at Quantitative
                                          Financial Strategies, Inc.
</TABLE>
 
 
  It is the responsibility of the investment adviser of each Underlying Fund
to make the investment decisions for that Fund and to place the purchase and
sale orders for the Fund's portfolio transactions in U.S. and foreign markets.
Such orders may be directed to any broker including, to the extent and in the
manner permitted by applicable law, Goldman Sachs or its affiliates. In
effecting purchases and sales of portfolio securities for a Fund, its
investment adviser will seek the best price and execution of the Fund's
orders. In doing so, where two or more brokers or dealers offer comparable
prices and execution for a particular trade, consideration may be given to
whether the broker or dealer provides investment research or brokerage
services or sells Shares of any Underlying Fund. See the Additional Statement
for a further description of the investment adviser's brokerage allocation
practices.
 
  As compensation for its services and assumption of certain expenses pursuant
to the Management Agreement, GSAM is entitled to a fee, computed daily and
payable monthly, at the annual rate equal to 0.35% of each Portfolio's average
daily net assets. The Investment Adviser has voluntarily agreed to waive 0.20%
of this fee. The Investment Adviser may discontinue or modify its voluntary
waiver in the future in its discretion.
 
                                      20
<PAGE>
 
  The Investment Adviser has voluntarily agreed to reduce or limit certain
"Other Expenses" of the Portfolios (excluding management, distribution and
service fees, transfer agency fees, taxes, interest, brokerage fees,
litigation, indemnification and other extraordinary expenses) to the extent
such expenses exceed 0.00% per annum of a Portfolio's average daily net
assets. Such reductions or limits, if any, may be discontinued or modified by
the Investment Adviser in its discretion at any time.
 
  In addition, each Portfolio, as a shareholder in the Underlying Funds, will
indirectly bear its proportionate share of any investment management fees and
other expenses paid by the Underlying Funds. The contractual management fee
payable to GSAM and/or its affiliates by each of the Underlying Funds in which
the Portfolios may invest is set forth below under "Expenses."
 
  In performing its investment advisory services, the investment adviser of an
Underlying Fund, while remaining ultimately responsible for the management of
the Fund, may rely upon the asset management division of its Singapore and
Tokyo affiliates for portfolio decisions and management with respect to
certain portfolio securities and is able to draw upon the research and
expertise of its other affiliate offices. In addition, the investment adviser
will have access to the research of, and proprietary technical models
developed by, Goldman Sachs and may apply quantitative and qualitative
analysis in determining the appropriate allocations among the categories of
issuers and types of securities.
 
  ACTIVITIES OF GOLDMAN SACHS AND ITS AFFILIATES AND OTHER ACCOUNTS MANAGED BY
GOLDMAN SACHS. The involvement of the Funds' investment advisers, Goldman
Sachs and their affiliates in the management of, or their interest in, other
accounts and other activities of Goldman Sachs may present conflicts of
interest with respect to an Underlying Fund or limit the investment activities
of an Underlying Fund. Goldman Sachs and its affiliates engage in proprietary
trading and advise accounts and funds which have investment objectives similar
to those of the Underlying Funds and/or which engage in and compete for
transactions in the same type of securities, currencies and instruments.
Goldman Sachs and its affiliates will not have any obligation to make
available any information regarding their proprietary activities or
strategies, or the activities or strategies used for other accounts managed by
them, for the benefit of the management of the Underlying Funds. The results
of the investment activities of an Underlying Fund, therefore, may differ from
those of Goldman Sachs and its affiliates and it is possible that the
Portfolios and the Underlying Funds could sustain losses during periods in
which Goldman Sachs and its affiliates and other accounts achieve significant
profits on their trading for proprietary or other accounts. In addition, the
Underlying Funds may, from time to time, enter into transactions in which
other clients of Goldman Sachs have an adverse interest. From time to time,
the activities of an Underlying Fund may be limited because of regulatory
restrictions applicable to Goldman Sachs and its affiliates, and/or their
internal policies designed to comply with such restrictions. See "Management--
Activities of Goldman Sachs and its Affiliates and Other Accounts Managed by
Goldman Sachs" in the Additional Statement for further information.
 
DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs, 85 Broad Street, New York, New York 10004, serves as the
exclusive Distributor of each Portfolio's Shares. Shares may also be sold by
Authorized Dealers. Authorized Dealers include investment dealers that are
members of the NASD and certain other financial service firms. To become an
Authorized Dealer, a dealer or financial service firm must enter into a sales
agreement with Goldman Sachs. The minimum investment requirements, services,
programs and purchase and redemption options for Shares purchased through a
particular Authorized Dealer may be different from those available to
investors purchasing through other Authorized Dealers.
 
  Goldman Sachs, 4900 Sears Tower, Chicago, Illinois 60606, also serves as
each Portfolio's transfer agent (the "Transfer Agent") and as such performs
various shareholder servicing functions. As compensation for the services
rendered to each Portfolio by Goldman Sachs (as Transfer Agent), Goldman Sachs
is entitled to
 
                                      21
<PAGE>
 
a fee with respect to each Portfolio's Class A, Class B and Class C Shares,
equal, on an annual basis, to 0.19% of average daily net assets. Shareholders
with inquiries regarding a Portfolio should contact Goldman Sachs (as Transfer
Agent) at the address or the telephone number set forth on the back cover page
of this Prospectus.
 
  From time to time, Goldman Sachs or any of its affiliates may purchase and
hold Shares of the Underlying Funds or Portfolios. Goldman Sachs reserves the
right to redeem at any time some or all of the Shares acquired for its own
account.
 
YEAR 2000
 
  Many computer systems were designed using only two digits to signify the
year (for example, "98" for "1998"). On January 1, 2000, if these computer
systems are not corrected, they may incorrectly interpret "00" as the year
"1900" rather than the year "2000," leading to computer shutdowns or errors
(commonly known as the "Year 2000 Problem"). To the extent these systems
conduct forward-looking calculations, these computer problems may occur prior
to January 1, 2000. Like other investment companies and financial and business
organizations, the Portfolios could be adversely affected in their ability to
process securities trades, price securities, provide shareholder account
services and otherwise conduct normal business operations if the Investment
Adviser or other Portfolio service providers do not adequately address this
problem in a timely manner. The Investment Adviser has established a dedicated
group to analyze these issues and to implement the systems modifications
necessary to prepare for the Year 2000 Problem. Currently, the Investment
Adviser does not anticipate that the transition to the 21st Century will have
any material impact on its ability to continue to service the Portfolios at
current levels. In addition, the Investment Adviser has sought assurances from
the Portfolios' other service providers that they are taking the steps
necessary so that they do not experience Year 2000 Problems, and the
Investment Adviser will continue to monitor the situation. At this time,
however, no assurance can be given that the actions taken by the Investment
Adviser and the Portfolios' other service providers will be sufficient to
avoid any adverse effect on the Portfolios due to the Year 2000 Problem.
 
 
                                   EXPENSES
 
  The Portfolios are responsible for the payment of their expenses. The
expenses include, without limitation, asset allocation; distribution and
service fees; custodial and transfer agency fees; brokerage fees and
commissions; filing fees for the registration or qualification of the
Portfolios' Shares under federal or state securities laws; organizational
expenses; fees and expenses incurred in connection with membership in
investment company organizations; taxes; interest; costs of liability
insurance; fidelity bonds or indemnification: any costs, expenses or losses
arising out of any liability of, or claim for damages or other relief asserted
against, the Portfolios for violation of any law; legal and auditing fees and
expenses (including the cost of legal and certain accounting services rendered
by employees of the Investment Adviser and its affiliates with respect to the
Portfolios); expenses of preparing and setting in type prospectuses,
Additional Statements, proxy material, financial reports and notices and the
printing and distributing of the same to shareholders and regulatory
authorities, compensation and expenses of the Trust's "non-interested"
Trustees and extraordinary expenses, if any, incurred by the Trust.
 
  The expenses associated with investing in a "fund of funds," such as the
Portfolios, are generally higher than those of investment companies that do
not invest in other mutual funds. These increased expenses stem from the fact
that investors must indirectly pay a portion of the operating costs of the
Underlying Funds. The structure of the Portfolios will, however, reduce any
layering of costs in the following manner: (a) any fees charged to the
Portfolios under the Management Agreement are for services that are in
addition to, and not duplicative of, services provided under any Underlying
Fund's management agreement; (b) the Portfolios pay no front-end or CDSCs in
connection with the purchase or redemption of Shares of the Underlying Funds;
(c) the
 
                                      22
<PAGE>
 
Portfolios do not pay any sales charges, distribution-related or service fees
related to the Shares of the Underlying Funds; (d) custodial and other fees
charged by both the Portfolios and the Underlying Funds are not redundant
inasmuch as distinct services are being provided at each level; and (e) any
additional incremental cost incurred by investing in the Portfolios is in
return for a substantial investment management service, namely the initial and
ongoing asset allocation of investments made in the Underlying Funds, and
provision of meaningful additional diversification benefits.
 
  The following chart shows the total operating expense ratios (management fee
plus other operating expenses) of Institutional Shares of each Underlying Fund
for the Fund's most recent fiscal year (except as indicated). In addition, the
following chart shows the contractual investment management fees payable to
GSAM and its affiliates by the Underlying Funds (in each case as an annualized
percentage of the Fund's average net assets). Absent voluntary fee waivers
and/or expense reimbursements, which may be discontinued at any time, the
total operating expense ratios of certain Underlying Funds would be higher.
 
<TABLE>
<CAPTION>
                                                                         TOTAL
                                                           CONTRACTUAL OPERATING
                                                           MANAGEMENT   EXPENSE
    UNDERLYING FUNDS                                           FEE      RATIO*
    ----------------                                       ----------- ---------
<S>                                                        <C>         <C>
Short Duration Government Fund............................    0.50%      0.54%
Adjustable Rate Government Fund...........................    0.40%      0.49%
Core Fixed-Income Fund....................................    0.40%      0.54%
Government Income Fund....................................    0.65%      0.58%
Global Income Fund........................................    0.90%      0.69%
High Yield Fund...........................................    0.70%      0.76%
Growth and Income Fund....................................    0.70%      0.79%
CORE U.S. Equity Fund.....................................    0.75%      0.74%
CORE Large Cap Growth Fund................................    0.75%      0.64%
CORE Small Cap Equity Fund................................    0.85%      0.93%
Capital Growth Fund.......................................    1.00%      1.04%
CORE International Equity Fund............................    0.85%      1.01%
Mid Cap Equity Fund.......................................    0.75%      0.89%
Small Cap Value Fund......................................    1.00%      1.10%
International Equity Fund.................................    1.00%      1.14%
Japanese Equity Fund......................................    1.00%      1.05%
International Small Cap Fund..............................    1.20%      1.40%
Emerging Markets Equity Fund..............................    1.20%      1.39%
Asia Growth Fund..........................................    1.00%      1.20%
Real Estate Securities Fund...............................    1.00%      1.04%
Financial Square Prime Obligations Money Market Fund......   0.205%      0.18%
</TABLE>
- --------
* Operating expenses of Institutional Shares for the underlying Funds have
  been restated to reflect fees and expenses in effect as of September 1,
  1998.
 
 
                            REPORTS TO SHAREHOLDERS
 
  Shareholders will receive an annual report containing audited financial
statements and a semi-annual report. To eliminate unnecessary duplication,
only one copy of the annual and semiannual reports may be sent to shareholders
with the same mailing address. Shareholders who desire a duplicate copy of
such reports to be
 
                                      23
<PAGE>
 
mailed to their residence should contact Goldman Sachs at 800-526-7384. Each
shareholder will also be provided with a printed confirmation for each
transaction in the shareholder's account and a quarterly account statement. A
year-to-date statement for any account will be provided upon request made to
Goldman Sachs. The Portfolios generally do not provide sub-accounting
services.
 
 
                                 HOW TO INVEST
 
ALTERNATIVE PURCHASE ARRANGEMENTS
 
  Each Portfolio continuously offers through this Prospectus Class A, Class B
and Class C Shares, as described more fully in "How to Buy Shares of the
Portfolios." If you do not specify in your instructions to the Portfolios
which class of Shares you wish to purchase, the Portfolios will assume that
your instructions apply to Class A Shares.
 
  CLASS A SHARES. If you invest less than $1 million in Class A Shares you
will pay an initial sales charge. Certain purchases may qualify for reduced
initial sales charges. If you invest $1 million or more in Class A Shares of a
Portfolio, no sales charge will be imposed at the time of purchase, but you
may incur a CDSC equal to 1.00% if you redeem your Shares within 18 months of
purchase. Class A Shares are subject to distribution and service fees of 0.25%
per annum of each Portfolio's average daily net assets attributable to Class A
Shares.
 
  CLASS B SHARES. Class B Shares are sold without an initial sales charge, but
are subject to a CDSC of up to 5% if redeemed within six years of purchase.
Class B Shares are subject to distribution and service fees of 1.00% per annum
of each Portfolio's average daily net assets attributable to Class B Shares.
See "Distribution and Authorized Dealer Service Plans." Class B Shares will
automatically convert to Class A Shares, based on their relative NAVs, eight
years after the initial purchase. Your entire investment in Class B Shares is
available to work for you from the time you make your initial investment, but
the distribution and service fee paid by Class B Shares will cause your Class
B Shares (until conversion to Class A Shares) to have a higher expense ratio
and to pay lower dividends, to the extent dividends are paid, than Class A
Shares.
 
  CLASS C SHARES. Class C Shares are sold without an initial sales charge, but
are subject to a CDSC of 1% if redeemed within 12 months of purchase. Class C
Shares are subject to distribution and service fees of 1.00% per annum of each
Portfolio's average daily net assets attributable to Class C Shares. See
"Distribution and Service Plans." Class C Shares have no conversion feature,
and accordingly, an investor that purchases Class C Shares will be subject to
the distribution and service fee imposed on Class C Shares for an indefinite
period, subject to annual approval by the Trust's Board of Trustees and
certain regulatory limitations. Your entire investment in Class C Shares is
available to work for you from the time you make your initial investment, but
the distribution and service fee paid by Class C Shares will cause your Class
C Shares to have a higher expense ratio and to pay lower dividends, to the
extent dividends are paid, than Class A Shares (or Class B Shares after
conversion to Class A Shares).
 
  FACTORS TO CONSIDER IN CHOOSING CLASS A, CLASS B OR CLASS C SHARES. The
decision as to which class to purchase depends on the amount you invest, the
intended length of the investment and your personal situation. For example, if
you are making an investment of $50,000 or more that qualifies for a reduced
sales charge, you should consider purchasing Class A Shares. A brief
description of when the initial sales charge may be reduced or eliminated is
set forth below under "Right of Accumulation" and "Statement of Intention." If
you prefer not to pay an initial sales charge on an investment and plan to
hold your investment for at least six years, you might
 
                                      24
<PAGE>
 
consider purchasing Class B Shares. If you prefer not to pay an initial sales
charge and are unsure of the length of your investment or plan to hold your
investment for less than eight years, you may prefer Class C Shares. A maximum
purchase limitation of $250,000 and $1,000,000 in the aggregate normally
applies to purchases of Class B Shares and Class C Shares, respectively.
Although Class C Shares are subject to a CDSC for only 12 months and at a
lower rate than Class B Shares, Class C Shares do not have the conversion
feature applicable to Class B Shares, making them subject to higher
distribution and service fees for an indefinite period. Authorized Dealers may
receive different compensation for selling Class A, Class B or Class C Shares.
 
HOW TO BUY SHARES OF THE PORTFOLIOS--CLASS A, CLASS B AND CLASS C SHARES
 
  You may purchase Shares of the Portfolios through any Authorized Dealer
(including Goldman Sachs) or directly from a Portfolio, c/o National Financial
Data Services, Inc. ("NFDS"), P.O. Box 419711, Kansas City, MO 64141-6711 on
any Business Day (as defined under "Additional Information") at the NAV next
determined after receipt of an order as described below under "Other Purchase
Information," plus, in the case of Class A Shares, any applicable sales
charge. Currently, each Portfolio's NAV is determined as of the close of
regular trading on the New York Stock Exchange (which is normally, but not
always, 4:00 p.m. New York time).
 
  The minimum initial investment in each Portfolio is $1,000. An initial
investment minimum of $250 applies to purchases in connection with Individual
Retirement Account Plans (excluding SIMPLE IRAs and Education IRAs) or
accounts established under the Uniform Gift to Minors Act ("UGMA"), tax-
sheltered retirement plans, and an initial investment minimum of $200 applies
to purchases in connection with 403(b) plans. The minimum initial investment
for purchases in connection with SIMPLE and Education IRAs, as well as
purchases through the Automatic Investment Plan, is $50. The minimum
subsequent investment is $50. These requirements may be waived at the
discretion of the Trust's officers.
 
  You may pay for purchases of Shares by check (except that the Trust will not
accept a check drawn on a foreign bank or a third party check), Federal
Reserve draft, federal funds wire, ACH transfer or bank wire. Purchases of
Shares by check or Federal Reserve draft should be made payable as follows:
(i) to an investor's Authorized Dealer, if purchased through such Authorized
Dealer, or (ii) to Goldman Sachs Asset Allocation Portfolios--(Name of
Portfolio and Class of Shares) and sent to NFDS, P.O. Box 419711, Kansas City,
MO 64141-6711. Federal funds wires, ACH transfers and bank wires should be
sent to State Street Bank and Trust Company ("State Street"). Payment must be
received within three Business Days after receipt of the purchase order. An
investor's Authorized Dealer is responsible for forwarding payment promptly to
the Portfolio.
 
  In order to make an initial investment in a Portfolio, an investor must
establish an account with the Portfolio by furnishing to the Portfolio,
Goldman Sachs or the investor's Authorized Dealer the information in the
Account Application attached to this Prospectus. The Portfolios may refuse to
open an account for any investor who fails to (i) provide a social security
number or other taxpayer identification number, or (ii) certify that such
number is correct (if required to do so under applicable law).
 
  The Portfolios reserve the right to redeem Shares of any shareholder whose
account balance is less than $50 as a result of earlier redemptions. Such
redemptions will not be implemented if the value of a shareholder's account
falls below the minimum account balance solely as a result of market
conditions. A Portfolio will give sixty (60) days' prior written notice to
shareholders whose Shares are being redeemed to allow them to purchase
sufficient additional Shares of the Portfolio to avoid such redemption. In
addition, the Portfolios and Goldman Sachs reserve the right to modify the
minimum investment, the manner in which Shares are offered and the sales
charge rates applicable to future purchases of Shares.
 
                                      25
<PAGE>
 
OFFERING PRICE--CLASS A SHARES
 
  The offering price of Class A Shares of each Portfolio is the next
determined NAV per Share plus a sales charge, if any, paid to Goldman Sachs at
the time of purchase of Shares as shown in the following table:
 
<TABLE>
<CAPTION>
                                                SALES CHARGE   MAXIMUM DEALER
      AMOUNT OF PURCHASE        SALES CHARGE AS AS PERCENTAGE   ALLOWANCE AS
  (INCLUDING SALES CHARGE, IF    PERCENTAGE OF  OF NET AMOUNT   PERCENTAGE OF
             ANY)               OFFERING PRICE    INVESTED    OFFERING PRICE***
  ---------------------------   --------------- ------------- -----------------
<S>                             <C>             <C>           <C>
Less than $50,000..............      5.50%          5.82%           5.00%
$ 50,000 up to (but less than)
 $100,000......................      4.75           4.99            4.00
$100,000 up to (but less than)
 $250,000......................      3.75           3.90            3.00
$250,000 up to (but less than)
 $500,000......................      2.75           2.83            2.25
$500,000 up to (but less than)
 $1 million....................      2.00           2.04            1.75
$1 million or more.............      0.00*          0.00*             **
</TABLE>
- --------
  * No sales charge is payable at the time of purchase of Class A Shares of $1
    million or more, but a CDSC may be imposed in the event of certain
    redemption transactions made within 18 months of purchase.
 
 ** Goldman Sachs pays a one-time commission to Authorized Dealers who
    initiate or are responsible for purchases of $1 million or more of Shares
    of the Portfolios equal to 1.00% of the amount under $3 million, 0.50% of
    the next $2 million, and 0.25% thereafter. Goldman Sachs may also pay,
    with respect to all or a portion of the amount purchased, a commission in
    accordance with the foregoing schedule to Authorized Dealers who initiate
    or are responsible for plans investing in the Portfolios which satisfy the
    criteria set forth in (h) below or "wrap" accounts purchasing $1 million
    or more which satisfy the criteria set forth in (i) below. Purchases by
    such plans will be made at NAV with no initial sales charge, but if all of
    the Shares held are redeemed within 18 months after the end of the
    calendar month in which such purchase was made, a CDSC, as described
    below, of 1.00% will be imposed upon the plan sponsor or the third party
    administrator. In addition, Authorized Dealers shall remit to Goldman
    Sachs such payments received in connection with "wrap" accounts in the
    event that Shares are redeemed within 18 months after the end of the
    calendar month in which the purchase was made.
 
*** During special promotions, the entire sales charge may be reallowed to
    Authorized Dealers. Authorized Dealers to whom substantially the entire
    sales charge is reallowed may be deemed to be "underwriters" under the
    Securities Act of 1933.
 
  Purchases of $1 million or more of Class A Shares will be made at NAV with
no initial sales charge, but if the Shares are redeemed within 18 months after
the end of the calendar month in which the purchase was made, excluding any
period of time in which the Shares were exchanged into and remained invested
in an ILA Portfolio (the "CDSC period"), a CDSC of 1.00% may be imposed
unless, in certain cases, the investor's Authorized Dealer enters into an
agreement with Goldman Sachs to return all or an applicable prorated portion
of its commission to Goldman Sachs. Any applicable CDSC will be assessed on an
amount equal to the lesser of the current market value or the original
purchase cost of the redeemed Class A Shares. Accordingly, no CDSC will be
imposed on increases in account value above the initial purchase price,
including any dividend or capital gains distributions which have been
reinvested in additional Class A Shares. Upon redemption of Shares subject to
a CDSC, shareholders will receive that portion of the appreciation in account
value attributable to the Shares actually redeemed. In determining whether a
CDSC applies to a redemption, it will be assumed that the redemption is first
made from any Class A Shares in your account that are not subject to the CDSC.
The CDSC is waived on redemptions in certain circumstances. See "Waiver on
Reduction of Contingent Deferred Sales Charges" below.
 
                                      26
<PAGE>
 
  Class A Shares of the Portfolios may be sold at NAV without payment of any
sales charge to (a) Goldman Sachs, its affiliates or their respective
officers, partners, directors or employees (including retired employees and
former partners), any partnership of which Goldman Sachs is a general partner,
any Trustee or officer of the Trust and designated family members of any of
the above individuals; (b) qualified retirement plans of Goldman Sachs; (c)
trustees or directors of investment companies for which Goldman Sachs or an
affiliate acts as sponsor; (d) any employee or registered representative of
any Authorized Dealer or their respective spouses and children; (e) banks,
trust companies or other types of depository institutions investing for their
own account or investing for accounts for which they have investment
discretion; (f) banks, trust companies or other types of depository
institutions investing for accounts for which they do not have investment
discretion; (g) any state, county or city, or any instrumentality, department,
authority or agency thereof, which is prohibited by applicable investment laws
from paying a sales charge or commission in connection with the purchase of
Shares of a Portfolio; (h) pension and profit sharing plans, pension funds and
other company-sponsored benefit plans that (1) buy Shares worth $500,000 or
more, or (2) have at the time of purchase, 100 or more eligible participants,
or (3) certify that they project to have annual plan purchases of $200,000 or
more, or (4) are provided administrative services by certain third-party
administrators that have entered into a special service agreement with Goldman
Sachs relating to such plan; (i) "wrap" accounts for the benefit of clients of
broker-dealers, financial institutions or financial planners, provided that
they have entered into an agreement with GSAM specifying aggregate minimums
and certain operating policies and standards; (j) registered investment
advisers investing for accounts for which they receive asset-based fees; (k)
accounts over which GSAM or its advisory affiliates have investment
discretion; and (l) shareholders receiving distributions from a qualified
retirement plan invested in the Goldman Sachs Funds and reinvesting such
proceeds in a Goldman Sachs IRA. Purchasers must certify eligibility for an
exemption on the Account Application and notify Goldman Sachs if the
shareholder is no longer eligible for an exemption. Exemptions will be granted
subject to confirmation of a purchaser's entitlement. Investors purchasing
Shares of the Portfolios at NAV without payment of any initial sales charge
may be charged a fee if they effect transactions in Shares through a broker or
agent. In addition, under certain circumstances, dividends and distributions
from any of the Goldman Sachs Funds may be reinvested in Shares of a Portfolio
at NAV, as described under "Cross-Reinvestment of Dividends and Distributions
and Automatic Exchange Program."
 
RIGHT OF ACCUMULATION--CLASS A SHARES
 
  Class A purchasers may qualify for reduced sales charges when the current
market value of holdings (Shares at current offering price), plus new
purchases, reaches $50,000 or more. Class A Shares of the Goldman Sachs
Portfolios may be combined under the Right of Accumulation. See the Additional
Statement for more information about the Right of Accumulation.
 
STATEMENT OF INTENTION--CLASS A SHARES
 
  Purchases of $50,000 or more made over a 13-month period are eligible for
reduced sales charges. Class A Shares of the Goldman Sachs Portfolios may be
combined under the Statement of Intention. See the Additional Statement for
more information about the Statement of Intention.
 
OFFERING PRICE--CLASS B SHARES
 
  Investors may purchase Class B Shares of the Portfolios at the next
determined NAV without the imposition of an initial sales charge. However,
Class B Shares redeemed within six years of purchase will be subject to a CDSC
at the rates shown in the table below. At redemption, the charge will be
assessed on the amount equal to the lesser of the current market value or the
original purchase cost of the Shares being redeemed. No CDSC will be imposed
on increases in account value above the initial purchase price, including
Shares derived from the reinvestment of dividends or capital gains
distributions. Upon redemption of Shares subject to a CDSC,
 
                                      27
<PAGE>
 
shareholders will receive that portion of the appreciation in account value
attributable to the Shares actually redeemed.
 
  The amount of the CDSC, if any, will vary depending on the number of years
from the time of purchase until the time of redemption of Class B Shares. For
the purpose of determining the number of years from the time of any purchase,
all payments during a month will be aggregated and deemed to have been made on
the first day of that month. In processing redemptions of Class B Shares, the
Portfolios will first redeem Shares not subject to any CDSC, and then Shares
held longest during the six-year period.
 
<TABLE>
<CAPTION>
                                                                    CDSC AS A
                                                                  PERCENTAGE OF
   YEAR SINCE                                                     DOLLAR AMOUNT
   PURCHASE                                                      SUBJECT TO CDSC
   ----------                                                    ---------------
   <S>                                                           <C>
   First........................................................      5.0%
   Second.......................................................      4.0%
   Third........................................................      3.0%
   Fourth.......................................................      3.0%
   Fifth........................................................      2.0%
   Sixth........................................................      1.0%
   Seventh and thereafter.......................................      none
</TABLE>
 
  Proceeds from the CDSC are payable to the Distributor and may be used in
whole or part to defray the Distributor's expenses related to providing
distribution-related services to the Portfolios in connection with the sale of
Class B Shares, including the payment of compensation to Authorized Dealers. A
commission equal to 4.00% of the amount invested is paid to Authorized
Dealers.
 
  Class B Shares of a Portfolio will automatically convert into Class A Shares
of the same Portfolio at the end of the calendar quarter that is eight years
after the purchase date, except as noted below. Class B Shares of a Portfolio
acquired by exchange from Class B Shares of another Portfolio will convert
into Class A Shares of such Portfolio based on the date of the initial
purchase. Class B Shares acquired through reinvestment of distributions will
convert into Class A Shares based on the date of the initial purchase of the
Shares on which the distribution was paid. The conversion of Class B Shares to
Class A Shares will not occur at any time the Portfolios are advised that such
conversions may constitute taxable events for federal tax purposes, which the
Portfolios believe is unlikely. If conversions do not occur as a result of
possible taxability, Class B Shares would continue to be subject to higher
expenses than Class A Shares for an indeterminate period.
 
OFFERING PRICE--CLASS C SHARES
 
  Investors may purchase Class C Shares of the Portfolios at the next
determined NAV without the imposition of an initial sales charge. However, if
Class C shares are redeemed within 12 months of purchase a CDSC of 1% will be
deducted from the redemption proceeds. At redemption, the charge will be
assessed on the amount equal to the lesser of the current market value or the
original purchase cost of the shares being redeemed. No CDSC will be imposed
on increases in account value above the initial purchase price, including
shares derived from the reinvestment of dividends or capital gains
distributions. Upon redemption of Shares subject to a CDSC, shareholders will
receive that portion of the appreciation in account value attributable to the
Shares actually redeemed.
 
 
                                      28
<PAGE>
 
  For the purpose of determining the number of months from the time of any
purchase, all payments during a month will be aggregated and deemed to have
been made on the first day of that month. In processing redemptions of Class C
Shares, the Portfolios will first redeem Shares held for longer than 12
months, and then Shares held for the longest period during the 12 month
period. Proceeds from the CDSC are payable to the Distributor and may be used
in whole or in part to defray the Distributor's expenses related to providing
distribution-related services to the Portfolios in connection with the sale of
Class C Shares, including the payment of compensation to Authorized Dealers. A
commission equal to 1.00% of the amount invested is paid to Authorized
Dealers.
 
REINVESTMENT OF REDEMPTION PROCEEDS--CLASS A, CLASS B AND CLASS C SHARES
 
  A shareholder who redeems Class A or Class B Shares of a Portfolio may
reinvest at NAV any portion or all of the redemption proceeds (plus that
amount necessary to acquire a fractional share to round off the purchase to
the nearest full share) in Class A Shares of the same Portfolio or any other
Goldman Sachs Fund. A shareholder who redeems Class C Shares of a Portfolio
may reinvest at NAV any portion or all of the redemption proceeds (plus that
amount necessary to acquire a fractional share to round off the purchase to
the nearest full share) in Class C Shares of the same Portfolio or any other
Goldman Sachs Fund. Shareholders should obtain and read the applicable
prospectuses of such other funds and consider their objectives, policies and
applicable fees before investing in any of such funds. This reinvestment
privilege is subject to the condition that the Shares redeemed have been held
for at least thirty (30) days before the redemption and that the reinvestment
is effected within ninety (90) days after such redemption. If you redeemed
Class A or Class C Shares, paid a CDSC upon a redemption and reinvest in Class
A or Class C Shares subject to the conditions set forth above, your account
will be credited with the amount of the CDSC previously charged, and the
reinvested Shares will continue to be subject to a CDSC. In this case, the
holding period of the Class A or Class C Shares acquired through reinvestment
for purposes of computing the CDSC payable upon a subsequent redemption will
include the holding period of the redeemed Shares. If you redeemed Class B
Shares and paid a CDSC upon redemption, you are permitted to reinvest the
redemption proceeds in Class A Shares at NAV as described above, but the
amount of the CDSC paid upon redemption will not be credited to your account.
 
  A reinvesting shareholder may be subject to tax as a result of such
redemption. If the redemption occurs within ninety (90) days after the
original purchase of Class A Shares, any sales charge paid on the original
purchase cannot be taken into account by a reinvesting shareholder to the
extent an otherwise applicable sales charge is not imposed pursuant to the
reinvestment privilege for purposes of determining gain or loss, if any,
realized on the redemption, but instead will be added to the tax basis of the
Class A Shares received in the reinvestment. To the extent that any loss is
realized and Shares of the same Portfolio are purchased within thirty (30)
days before or after the redemption, some or all of the loss may not be
allowed as a deduction depending upon the number of Shares purchased.
Shareholders should consult their own tax advisers concerning the tax
consequences of a redemption and reinvestment. Upon receipt of a written
request, the reinvestment privilege may be exercised once annually by a
shareholder, except that there is no such time limit as to the availability of
this privilege in connection with transactions the sole purpose of which is to
reinvest the proceeds at NAV in a tax-sheltered retirement plan.
 
WAIVER OR REDUCTION OF CONTINGENT DEFERRED SALES CHARGE--CLASS A, B AND C
SHARES
 
  The CDSC on Class B , Class C and Class A Shares that are subject to a CDSC
may be waived or reduced if the redemption relates to (a) retirement
distributions or loans to participants or beneficiaries from pension and
profit sharing plans, pension funds and other company-sponsored benefit plans
(each a "Plan"); (b) the death or disability (as defined in Section 72(m)(7)
of the Code) of a participant or beneficiary in a Plan; (c) hardship
 
                                      29
<PAGE>
 
withdrawals by a participant or beneficiary in a Plan; (d) satisfying the
minimum distribution requirements of the Code; (e) the establishment of
"substantially equal periodic payments" as described in Section 72(t)(2) of
the Code; (f) the separation from service by a participant or beneficiary in a
Plan; (g) the death or disability (as defined in Section 72(m)(7) of the Code)
of a shareholder if the redemption is made within one year of such event; (h)
excess contributions distributed from a Plan; (i) distributions from a
qualified retirement plan invested in the Goldman Sachs Funds which are being
rolled over to a Goldman Sachs IRA; and (j) redemption proceeds which are to
be reinvested in accounts or non-registered products over which GSAM or its
advisory affiliates have investment discretion. In addition, Class A, Class B
and Class C Shares subject to a Systematic Withdrawal Plan may be redeemed
without a CDSC. However, Goldman Sachs reserves the right to limit such
redemptions, on an annual basis, to 12% each of the value of your Class B and
Class C Shares and 10% of the value of your Class A Shares.
 
 
                      SERVICES AVAILABLE TO SHAREHOLDERS
 
AUTOMATIC INVESTMENT PLAN
 
  Systematic cash investments may be made through a shareholder's bank via the
Automated Clearing House Network or a shareholder's checking account via bank
draft each month. Required forms are available from Goldman Sachs or any
Authorized Dealer.
 
CROSS-REINVESTMENT OF DIVIDENDS AND DISTRIBUTIONS AND AUTOMATIC EXCHANGE
PROGRAM
 
  A shareholder may elect to cross-reinvest dividends and capital gain
distributions paid by a Portfolio in Shares of the same class or an equivalent
class of other Goldman Sachs Funds or ILA Portfolios. See "Portfolio
Highlights." A shareholder may also elect to exchange automatically a
specified dollar amount of Shares of a Portfolio for Shares of the same Class
or an equivalent Class of any other Goldman Sachs Fund or ILA Portfolio.
Shares acquired through cross-reinvestment of dividends or the automatic
exchange program will be purchased at NAV and will not be subject to any
initial sales charge or CDSC as a result of the cross-reinvestment or
exchange, but Shares subject to a CDSC acquired under the automatic exchange
program may be subject to a CDSC at the time of redemption from the Fund into
which the exchange is made determined on the basis of the date and value of
the investor's initial purchase of the Fund from which the exchange (or any
prior exchange) is made. Automatic exchanges are made monthly on the fifteenth
day of each month or the first Business Day thereafter. The minimum dollar
amount for automatic exchanges must be at least $50 per month. Cross-
reinvestments and automatic exchanges are subject to the following conditions:
(a) the value of the shareholder's account(s) in the Fund which is paying the
dividend or from which the automatic exchange is being made must equal or
exceed $5,000; and (b) the value of the account in the acquired Fund must
equal or exceed the acquired Fund's minimum initial investment requirement or
the shareholder must elect to continue cross-reinvestment or automatic
exchanges until the value of acquired Fund Shares in the shareholder's account
equals or exceeds the acquired Fund's minimum initial investment requirement.
A Portfolio shareholder may elect cross-reinvestment into an identical account
or an account registered in a different name or with a different address,
social security or other taxpayer identification number, provided that the
account in the acquired Fund has been established, appropriate signatures have
been obtained and the minimum initial investment requirement has been
satisfied. A Portfolio shareholder should obtain and read the prospectus of
the Fund into which dividends are invested or automatic exchanges are made.
 
 
                                      30
<PAGE>
 
TAX-SHELTERED RETIREMENT PLANS
 
  The Portfolios offer their Shares for purchase by retirement plans,
including traditional and Roth IRAs for individuals and their spouses, IRA
plans for employees in connection with employer sponsored SEP, SAR-SEP and
SIMPLE IRA plans, 403(b) plans and defined contribution plans such as 401(k)
Salary Reduction Plans. Detailed information concerning these plans may be
obtained from the Transfer Agent. The information sets forth the service fee
charged for retirement plans and describes the federal income tax consequences
of establishing a plan. This information should be read carefully, and
consultation with an attorney or tax adviser may be advisable.
 
EXCHANGE PRIVILEGE
 
  Shares of a Portfolio may be exchanged at NAV without the imposition of an
initial sales charge or CDSC at the time of exchange for Shares of the same
Class or an equivalent Class of any other Portfolio, Goldman Sachs Fund or ILA
Portfolio. A shareholder needs to obtain and read the prospectus of the Fund
into which the exchange is made. The Shares of these other Funds acquired by
an exchange may later be exchanged for Shares of the same Class (or an
equivalent class) of the original Portfolio at the next determined NAV without
the imposition of an initial sales charge or CDSC if the dollar amount in the
Portfolio resulting from such exchanges is below the shareholder's all-time
highest dollar amount on which it has previously paid the applicable sales
charge. Shares of these other Funds purchased through dividends and/or capital
gains reinvestment may be exchanged for shares of the Portfolios without a
sales charge. In addition to free automatic exchanges pursuant to the
Automatic Exchange Program, six free exchanges are permitted in each 12 month
period. A fee of $12.50 may be charged for each subsequent exchange during
such period. The exchange privilege may be materially modified or withdrawn at
any time upon 60 days' notice to shareholders and is subject to certain
limitations.
 
  An exchange of Shares subject to a CDSC will not be subject to the
applicable CDSC at the time of exchange. Shares subject to a CDSC acquired in
an exchange will be subject to the CDSC of the Shares originally held. For
purposes of determining the amount of any applicable CDSC, the length of time
a shareholder has owned Shares will be measured from the date the shareholder
acquired the original Shares subject to a CDSC and will not be affected by any
subsequent exchange.
 
  An exchange may be made by identifying the applicable Portfolio and Class of
Shares and either writing to Goldman Sachs, Attention: Goldman Sachs Asset
Allocation Portfolios, Shareholder Services, c/o NFDS, P.O. Box 419711, Kansas
City, MO 64141-6711 or, unless the investor has specifically declined
telephone exchange privileges on the Account Application or elected in writing
not to utilize telephone exchanges, by a telephone request to the Transfer
Agent at 800-526-7384 (7:00 a.m. to 3:00 p.m. Chicago time). Certain
procedures are employed to prevent unauthorized or fraudulent exchange
requests as set forth under "How to Sell Shares of the Portfolios." Under the
telephone exchange privilege, Shares may be exchanged among accounts with
different names, addresses and social security or other taxpayer
identification numbers only if the exchange instructions are in writing and
received in accordance with the procedures set forth under "How to Sell Shares
of the Portfolio." In times of drastic economic or market changes the
telephone exchange privilege may be difficult to implement.
 
  For federal income tax purposes, an exchange, including an automatic
exchange, is treated as a redemption of the Shares surrendered in the
exchange, on which an investor may be subject to tax, followed by a purchase
of Shares received in the exchange. If such redemption occurs within 90 days
after the purchase of such Shares, to the extent a sales charge that would
otherwise apply to the Shares received in the exchange is not imposed,
 
                                      31
<PAGE>
 
the sales charge paid on such purchase of Class A Shares cannot be taken into
account by the exchanging shareholder for purposes of determining gain or
loss, if any, realized on such redemption for federal income tax purposes, but
instead will be added to the tax basis of the Shares received in the exchange.
Shareholders should consult their own tax advisers concerning the tax
consequences of an exchange.
 
  Eligible investors may exchange certain Classes of Shares for another class
of Shares of the same Portfolio. For further information, call Goldman Sachs
at the number set forth on the back of the Prospectus.
 
  All exchanges which represent an initial investment in a Portfolio must
satisfy the minimum investment requirements of the Portfolio into which the
Shares are being exchanged. Exchanges are available only in states where
exchanges may legally be made.
 
OTHER PURCHASE INFORMATION
 
  Authorized Dealers and other financial intermediaries may be authorized to
accept, on the Trust's behalf, purchase, exchange and redemption orders placed
by or on behalf of their customers and, if approved by the Trust, to designate
other intermediaries to accept such orders. In these cases, a Portfolio will
be deemed to have received an order that is in proper form when the order is
accepted by an Authorized Dealer or intermediary on a Business Day, and the
order will be priced at a Portfolio's NAV per Share (adjusted for any
applicable sales charge) next determined after such acceptance. Otherwise, a
Portfolio or Goldman Sachs must receive an order in proper form before it is
effective. Authorized Dealers and intermediaries will be responsible for
transmitting accepted orders to the Portfolios within the period agreed upon
by them. Customers should contact their Authorized Dealers or intermediaries
to learn whether they are authorized to accept orders for the Trust.
 
  Authorized Dealers and other financial intermediaries provide varying
arrangements for their clients to purchase and redeem Portfolio Shares. Some
may establish higher minimum investment requirements and others may limit the
availability of certain privileges with respect to the purchase and redemption
of Shares or the reinvestment of dividends. Firms may arrange with their
clients for other investment or administrative services and may independently
establish and charge additional fees not described in this Prospectus to their
clients for such services. If Shares of a Portfolio are held in a "street
name" account or were purchased through an Authorized Dealer, shareholders
should contact the Authorized Dealer to purchase, redeem or exchange Shares,
to make changes in or give instructions concerning the account or to obtain
information about the account.
 
  The Portfolios and Goldman Sachs each reserves the right to reject any
specific purchase order (including exchanges) or to restrict purchases or
exchanges by a particular purchaser (or group of related purchasers). This may
occur, for example, when a purchaser or group of purchasers' pattern of
frequent purchases, sales or exchanges of Shares of a Portfolio is evident, or
if purchases, sales or exchanges are, or a subsequent abrupt redemption might
be, of a size that would disrupt management of a Portfolio.
 
  In the sole discretion of Goldman Sachs, a Portfolio may accept securities
instead of cash for the purchase of Shares of the Portfolio. Such purchases
will be permitted only if the Investment Adviser determines that any
securities acquired in this manner are consistent with the Portfolio's
investment objectives, restrictions and policies and are desirable investments
for the Portfolio.
 
  The Investment Adviser, Distributor, and/or their affiliates also pay
additional compensation from time to time, out of their assets and not as an
additional charge to the Portfolios, to selected Authorized Dealers and other
persons in connection with the sale, distribution and/or servicing of Shares
of the Portfolios, the Underlying
 
                                      32
<PAGE>
 
Funds and other investment portfolios of the Trust (such as additional
payments based on new sales, amounts exceeding pre-established thresholds, or
the length of time their customers' assets have remained in a Portfolio) and,
subject to applicable NASD regulations, contribute to various non-cash and
cash incentive arrangements to promote the sale of Shares, as well as sponsor
various educational programs, sales contests and/or promotions in which
participants may receive reimbursement of expenses, entertainment and prizes
such as travel awards, merchandise, cash, investment research and educational
information and related support materials. This additional compensation can
vary among Authorized Dealers depending upon such factors as the amounts their
customers have invested (or may invest) in particular investment portfolios of
the Trust, the particular program involved, or the amount of reimbursable
expenses. Additional compensation based on sales may, but is currently not
expected to, exceed 0.50% (annualized) of the amount invested. For further
information, see "Other Information Regarding Purchases, Redemptions,
Exchanges and Dividends" in the Additional Statement.
 
 
                        DISTRIBUTION AND SERVICE PLANS
 
  The Trust has adopted distribution and service plans on behalf of each
Portfolio's Class A, Class B and Class C Shares (each a "Plan"). Under the
Plans, Goldman Sachs is entitled to a monthly fee from each Portfolio for
distribution services equal, on an annual basis, to 0.25%, 0.75% and 0.75%,
respectively, of each Portfolio's average daily net assets attributable to
Class A, Class B and Class C Shares, respectively.
 
  Goldman Sachs may use this distribution fee for its expenses of distributing
Class A, Class B and Class C Shares of each Portfolio. The types of expenses
for which Goldman Sachs may be compensated for distribution services under the
Plans include: compensation paid to and expenses incurred by Authorized
Dealers, Goldman Sachs and their respective officers, employees and sales
representatives; commissions paid to Authorized Dealers; allocable overhead;
telephone and travel expenses; interest expenses and other costs associated
with the financing of such compensation and expenses; the printing of
prospectuses for prospective shareholders; preparation and distribution of
sales literature and advertising of any type; and all other expenses incurred
in connection with activities primarily intended to result in the sale of
Class A, Class B and Class C Shares. Goldman Sachs may also use payments under
the Class A Plan for personal and account maintenance services as described
below. The aggregate compensation that may be received under the Plans for
distribution services may not exceed the limitations imposed by the NASD's
Conduct Rules. Payments for distribution services are also subject to the
requirements of Rule 12b-1 under the Act.
 
  Under the Plans for Class B and Class C Shares, Goldman Sachs is also
entitled to receive a separate fee equal on an annual basis to 0.25% of each
Portfolio's average daily net assets attributable to Class B or Class C
Shares. This fee is for personal and account maintenance services, and may be
used to make payments to Goldman Sachs, Authorized Dealers and their officers,
sales representatives and employees for responding to inquiries of, and
furnishing assistance to, shareholders regarding ownership of their Shares or
their accounts or similar services not otherwise provided on behalf of the
Portfolios. If the distribution or service fees received by Goldman Sachs
pursuant to the Plans exceed its expenses, Goldman Sachs may realize a profit
from these arrangements. The Plans will be reviewed and are subject to
approval annually by the Trustees.
 
  In connection with the sale of Class C Shares, Goldman Sachs begins paying
the 0.75% distribution fee as an ongoing commission, and the 0.25% ongoing
service fee, to Authorized Dealers after the Shares have been held for one
year. All fees are paid by Goldman Sachs on a quarterly basis.
 
 
                                      33
<PAGE>
 
 
                     HOW TO SELL SHARES OF THE PORTFOLIOS
 
  The Portfolios will redeem their shares upon request of a shareholder on any
Business Day at the NAV next determined after the receipt of such request in
proper form, subject to any applicable CDSC. See "Net Asset Value". Redemption
proceeds will be mailed by check to a shareholder within three (3) Business
Days of receipt of a properly executed request. If the Shares to be redeemed
were recently purchased by check, a Portfolio may delay transmittal of
redemption proceeds until such time as it has assured itself that good funds
have been collected for the purchase of such Shares. This may take up to
fifteen (15) days. Redemption requests may be made by writing to or calling
the Transfer Agent at the address or telephone number set forth on the back
cover of this Prospectus or an Authorized Dealer.
 
  The Trust accepts telephone requests for redemption of Shares for amounts up
to $50,000 within any seven (7) calendar day period, except for investors who
have specifically declined telephone redemption privileges on the Account
Application or elected in writing not to utilize telephone redemptions
(proceeds which are sent to a Goldman Sachs brokerage account are not subject
to the $50,000 limit). It may be difficult to implement redemptions by
telephone in times of drastic economic or market changes. By completing an
Account Application, an investor agrees that the Trust, the Distributor and
the Transfer Agent shall not be liable for any loss incurred by the investor
by reason of the Trust accepting unauthorized telephone redemption requests if
the Trust reasonably believes the instructions to be genuine. Thus,
shareholders risk possible losses in the event of a telephone redemption not
authorized by them. The Trust may accept telephone redemption instructions
from any person identifying himself as the owner of an account or the owner's
broker where the owner has not declined in writing to utilize this service.
 
  In an effort to prevent unauthorized or fraudulent redemption and exchange
requests by telephone, Goldman Sachs and NFDS each employ reasonable
procedures specified by the Trust to confirm that such instructions are
genuine. Consequently, proceeds of telephone redemption requests will be sent
only to the shareholder's address of record or authorized bank account
designated in the Account Application and exchanges of shares will be made
only to an identical account. Telephone requests will also be recorded. The
Trust may implement other procedures from time to time concerning telephone
redemptions and exchanges. If reasonable procedures are not employed, the
Trust may be liable for any loss due to unauthorized or fraudulent
transactions. Proceeds of telephone redemptions will be mailed to the
shareholder's address of record or wired to the authorized bank account
indicated on the Account Application, unless the shareholder provides written
instructions (accompanied by a signature guarantee) indicating another
address. Telephone redemptions will not be accepted during the 30-day period
following any change in a shareholder's address of record. This redemption
option does not apply to Shares held in a "street name" account. Shareholders
whose accounts are held in "street name" should contact their broker of record
who may effect telephone redemptions on their behalf. The Trust reserves the
right to terminate or modify the telephone redemption service at any time.
 
  Written requests for redemptions must be signed by each shareholder with its
signature guaranteed by a bank, a securities broker or dealer, a credit union
having authority to issue signature guarantees, a savings and loan
association, a building and loan association, a cooperative bank, a federal
savings bank or association, a national securities exchange, a registered
securities association or a clearing agency, provided that such institution
satisfies the standards established by the Transfer Agent.
 
 
                                      34
<PAGE>
 
  The Portfolios will also arrange for the proceeds of redemptions effected by
any means to be wired as federal funds to the bank account designated in the
shareholder's Account Application. Redemption proceeds will normally be wired
on the next Business Day in federal funds (for a total of one Business Day
delay) following receipt of a properly executed wire transfer redemption
request. Wiring of redemption proceeds may be delayed one additional Business
Day if the Federal Reserve Bank is closed on the day redemption proceeds would
ordinarily be wired. A transaction fee of $7.50 may be charged for payments of
redemption proceeds by wire. In order to change the bank designated on the
Account Application to receive redemption proceeds, a written request must be
received by the Transfer Agent. This request must be signature guaranteed as
set forth above. Further documentation may be required for executors, trustees
or corporations. Once wire transfer instructions have been given by Goldman
Sachs or an Authorized Dealer, neither a Portfolio, the Trust, Goldman Sachs
nor any Authorized Dealer assumes any further responsibility for the
performance of intermediaries or the shareholder's bank in the transfer
process. If a problem with such performance arises, the shareholder should
deal directly with such intermediaries or bank.
 
  Additional documentation regarding a redemption by any means may be required
to effect a redemption when deemed appropriate by the Transfer Agent. The
request for such redemption will not be considered to have been received in
proper form until such additional documentation has been received.
 
SYSTEMATIC WITHDRAWAL PLAN
 
  A shareholder may draw on shareholdings systematically via check or ACH in
any amount specified by the shareholder over $50. Checks are only available on
or about the 25th of each month. Each systematic withdrawal is a redemption
and therefore a taxable transaction. A minimum balance of $5,000 in Shares of
a Portfolio is required. The maintenance of a withdrawal plan concurrently
with purchases of additional Class A, Class B or Class C Shares would be
disadvantageous because of the sales charge imposed on your purchases of Class
A shares or the imposition of a CDSC on your redemptions of Class A, Class B
or Class C Shares. The CDSC applicable to Class A, Class B or Class C Shares
redeemed under a systematic withdrawal plan may be waived. See "How to
Invest--Waiver or Reduction of Contingent Deferred Sales Charge." See
Additional Statement for more information about the Systematic Withdrawal
Plan.
 
 
                                   DIVIDENDS
 
  Each dividend from net investment income and capital gain distributions, if
any, declared by a Portfolio on its outstanding Shares will, at the election
of each shareholder, be paid in: (i) cash; (ii) additional Shares of the same
class of the Portfolio; or (iii) Shares of the same or an equivalent class of
other Goldman Sachs Funds or units of the ILA Portfolios (the Prime
Obligations Portfolio only for Class B and Class C), as described under
"Cross-Reinvestment of Dividends and Distributions and Automatic Exchange
Program." This election should initially be made on a shareholder's Account
Information Form and may be changed upon written notice to Goldman Sachs at
any time prior to the record date for a particular dividend or distribution.
If no election is made, all dividends from net investment income and capital
gain distributions will be reinvested in Class A, B or C Shares of the
applicable Portfolio.
 
  The election to reinvest dividends and distributions paid by a Portfolio in
additional Shares or units of the Portfolio or another Goldman Sachs Fund or
ILA Portfolio will not affect the tax treatment of such dividends
 
                                      35
<PAGE>
 
and distributions, which will be treated as received by the shareholder and
then used to purchase Shares or units of a Portfolio of another Goldman Sachs
Fund or an ILA Portfolio.
 
  Each Portfolio intends that all or substantially all its net investment
income and net realized capital gains, after reduction by available capital
losses, including any capital losses carried forward from prior years, will be
declared as dividends for each taxable year. The Income Strategy Portfolio
will pay dividends from net investment income monthly. The Growth and Income
Strategy Portfolio and Growth Strategy Portfolio will each pay dividends from
net investment income quarterly. The Aggressive Growth Strategy Portfolio will
pay dividends from net investment income annually. Each Portfolio will pay
dividends from net realized capital gains, reduced by available capital
losses, at least annually. From time to time, a portion of a Portfolio's
dividends may constitute a return of capital.
 
  At the time of an investor's purchase of Shares of a Portfolio a portion of
the NAV per Share may be represented by undistributed income of the Portfolio
or realized or unrealized appreciation of the Portfolio's investments.
Therefore, subsequent distributions on such Shares from such income or
realized appreciation may be taxable to the investor even if the NAV of the
investor's Shares is, as a result of the distributions, reduced below the cost
of such Shares and the distributions (or portions thereof) represent a return
of a portion of the purchase price.
 
 
                                NET ASSET VALUE
 
  The NAV per Share of each Class of a Portfolio is calculated by the
Portfolio's custodian as of the close of regular trading on the New York Stock
Exchange (which is normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m.
New York time), on each Business Day (as such term is defined under
"Additional Information"). NAV per Share of each Class is calculated by
determining the net assets attributed to each Class and dividing by the number
of outstanding Shares of that Class. Portfolio securities are valued based on
market quotations or, if accurate quotations are not readily available, at
fair value as determined in good faith under procedures established by the
Trustees.
 
 
                            PERFORMANCE INFORMATION
 
  From time to time each Portfolio may publish average annual total return,
yield and distribution rates in advertisements and communications to
shareholders or prospective investors. Average annual total return is
determined by computing the average annual percentage change in value of
$1,000 invested at the maximum public offering price for specified periods
ending with the most recent calendar quarter, assuming reinvestment of all
dividends and distributions at NAV. The total return calculation assumes a
complete redemption of the investment at the end of the relevant period. Total
return calculations for Class A Shares reflect the effect of paying the
maximum initial sales charge. Investment at a lower sales charge would result
in higher performance figures. Total return calculations for Class B and Class
C Shares reflect deduction of the applicable CDSC imposed upon redemption of
Class B and Class C Shares held for the applicable period. Each Portfolio may
also from time to time advertise total return on a cumulative, average, year-
by-year or other basis for various specified periods by means of quotations,
charts, graphs or schedules. In addition, each Portfolio may furnish total
return calculations based on investments at various sales charge levels or at
NAV. Any performance information which
 
                                      36
<PAGE>
 
is based on a Portfolio's NAV per Share would be reduced if a sales charge
were taken into account. In addition to the above, each Portfolio may from
time to time advertise its performance relative to certain averages,
performance rankings, indices, other information prepared by recognized mutual
fund statistical services and investments for which reliable performance
information is available.
 
  The Portfolios compute their yield by dividing net investment income earned
during a recent thirty-day period by the product of the average daily number
of Shares outstanding and entitled to receive dividends during the period and
the maximum offering price per share on the last day of the relevant period.
The results are compounded on a bond equivalent (semi-annual) basis and then
annualized. Net investment income per share is equal to the dividends and
interest earned during the period, reduced by accrued expenses for the period.
The calculation of net investment income for these purposes may differ from
the net investment income determined for accounting purposes. The Portfolios'
quotations of distribution rate are calculated by annualizing the most recent
distribution of net investment income for a monthly, quarterly or other
relevant period and dividing this amount by the NAV per Share or maximum
public offering price on the last day of the period for which the distribution
rate is being calculated.
 
  Each Portfolio's total return, yield and distribution rate will be
calculated separately for each Class of Shares in existence. Because each
Class of Shares may be subject to different expenses, the total return, yield
and distribution rate calculations with respect to each Class of Shares for
the same period will differ. The investment performance of the Class A, Class
B and Class C Shares will be affected by the payment of a sales charge,
distribution and service fees and other class specific expenses. See "Shares
of the Trust."
 
  Each Portfolios' performance quotations do not reflect any fees charged by
an Authorized Dealer to its customer accounts in connection with investments
in the Portfolios. The investment results of a Portfolio will fluctuate over
time and any presentation of investment results for any prior period should
not be considered a representation of what an investment may earn or what the
Portfolio's performance may be in any future period. In addition to
information provided in shareholder reports, the Portfolios may, in their
discretion, from time to time make a list of their holdings available to
investors upon request.
 
 
                              SHARES OF THE TRUST
 
  Each Portfolio is classified as "diversified" under the Investment Company
Act of 1940, as amended (the "1940 Act"). Each Portfolio is a series of
Goldman Sachs Trust, which was formed under the laws of the State of Delaware
on January 28, 1997. The Trustees have authority under the Trust's Declaration
of Trust to create and classify Shares of beneficial interests in separate
series, without further action by shareholders. Additional series may be added
in the future. The Trustees also have authority to classify and reclassify any
series or portfolio of Shares into one or more classes. Information about the
Trust's other series and classes is contained in separate prospectuses.
 
  When issued, Shares are fully paid and non-assessable. In the event of
liquidation, shareholders of each class are entitled to share pro rata in the
net assets of the applicable Portfolio available for distribution to the
shareholders of such class. All Shares are freely transferable and have no
preemptive, subscription or conversion rights. Shareholders are entitled to
one vote per Share, provided that, at the option of the Trustees, shareholders
will be entitled to a number of votes based upon the NAVs represented by their
Shares.
 
  The Trust does not intend to hold annual meetings of shareholders. However,
recordholders may, under certain circumstances, as permitted by the Act,
communicate with other shareholders in connection with
 
                                      37
<PAGE>
 
requiring a special meeting of shareholders. The Trustees will call a special
meeting of shareholders for the purpose of electing Trustees if, at any time,
less than a majority of Trustees holding office at the time were elected by
shareholders.
 
  In the interest of economy and convenience, the Trust does not issue
certificates representing the Portfolios' Shares. Instead, the Transfer Agent
maintains a record of each shareholder's ownership. Each shareholder receives
confirmation of purchase and redemption orders from the Transfer Agent.
Portfolio Shares and any dividends and distributions paid by a Portfolio are
reflected in account statements from the Transfer Agent.
 
 
                                   TAXATION
 
FEDERAL TAXES
 
  Each Portfolio is treated as a separate entity for tax purposes. Each
Portfolio intends to elect to be treated as a regulated investment company and
qualify for such treatment for each taxable year under Subchapter M of the
Internal Revenue Code of 1986, as amended (the "Code"). To qualify as such, a
Portfolio must satisfy certain requirements relating to the sources of its
income, diversification of its assets and distribution of its income to
shareholders. As a regulated investment company, a Portfolio will not be
subject to federal income or excise tax on any net investment income and net
realized capital gains that are distributed to its shareholders in accordance
with certain timing requirements of the Code.
 
  Dividends paid by a Portfolio from net investment income, certain net
realized foreign exchange gains, the excess of net short-term capital gain
over net long-term capital loss and original issue discount or market discount
income will be taxable to its shareholders as ordinary income. Distributions
out of the net capital gain (the excess of net long-term capital gain over net
short-term capital loss), if any, of a Portfolio will be taxed to shareholders
as long-term capital gains, regardless of the length of time a shareholder has
held his or her Shares or whether such gain was not reflected in the price
paid for the Shares. These tax consequences will apply whether distributions
are received in cash or reinvested in Shares. A Portfolio's dividends that are
paid to its corporate shareholders and are attributable to qualifying
dividends such Portfolio or an underlying Fund receives from U.S. domestic
corporations may be eligible, in the hands of such corporate shareholders, for
the corporate dividends-received deduction, subject to certain holding period
requirements and debt financing limitations under the Code. A portion of each
Portfolio's dividends may generally qualify, in the hands of corporate
shareholders, for the corporate dividends-received deduction. Certain
distributions paid by a Portfolio in January of a given year may be taxable to
shareholders as if received the prior December 31. Shareholders will be
informed annually about the amount and character of distributions received
from the Portfolios for federal income tax purposes.
 
  Investors should consider the tax implications of buying Shares immediately
prior to a distribution. Investors who purchase Shares shortly before the
record date for a distribution will pay a per share price that includes the
value of the anticipated distribution and will be taxed on the distribution
even though the distribution represents a return of a portion of the purchase
price.
 
  Redemptions and exchanges of Shares are taxable events.
 
  Individuals and certain other classes of shareholders may be subject to 31%
backup withholding of federal income tax on distributions, redemptions and
exchanges if they fail to furnish their correct taxpayer identification
 
                                      38
<PAGE>
 
number and certain certifications required by the Internal Revenue Service or
if they are otherwise subject to backup withholding. Individuals, corporations
and other shareholders that are not U.S. persons under the Code are subject to
different tax rules and may be subject to nonresident alien withholding at the
rate of 30% (or a lower rate provided by an applicable tax treaty, if any) on
amounts treated as ordinary dividends from the Portfolios.
 
  Each Portfolio may be subject to foreign withholding or other foreign taxes
on income or gain from certain foreign securities. In general, the Portfolios
do not anticipate that they will be eligible to pass any foreign tax credits
through to their shareholders; however, the Portfolios may deduct these taxes
in computing their taxable income, if any.
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local
or foreign taxes on payments received from the Portfolios. A state income (and
possibly local income and/or intangible property) tax exemption may be
available to the extent (if any) a Portfolio's distributions are derived from
interest on (or, in the case of intangible property taxes, the value of its
assets is attributable to) certain U.S. Government obligations, provided in
some states that certain thresholds for holdings of such obligations and/or
reporting requirements are satisfied. For a further discussion of certain tax
consequences of investing in Shares of the Portfolios, see "Taxation" in the
Additional Statement. Shareholders are urged to consult their own tax advisers
regarding specific questions as to federal, state and local taxes as well as
to any foreign taxes.
 
 
                            ADDITIONAL INFORMATION
 
  As used in this Prospectus, the term "Business Day" means any day the New
York Stock Exchange is open for trading, which is Monday through Friday except
for holidays. The New York Stock Exchange is closed on the following holidays:
New Year's Day, Martin Luther King, Jr. Day, Presidents' Day (observed), Good
Friday, Memorial Day (observed), Independence Day, Labor Day, Thanksgiving Day
and Christmas Day.
 
                                      39
<PAGE>
 
 
                                  APPENDIX A
 
  This Appendix describes various investments and investment techniques that
may be used by the Underlying Funds. This Appendix also describes certain
risks associated with these investments and techniques. Further information is
provided in the Additional Statement and in the prospectuses of the Underlying
Funds.
 
  As noted above, the Underlying Equity Funds invest primarily in common
stocks and other equity securities (including real estate investment trusts),
and the Underlying Fixed-Income Funds invest primarily in fixed income
securities. The Short Duration Government and Adjustable Rate Government Funds
invest in U.S. Government securities and related repurchase agreements, and
neither of these Funds, the Government Income Fund nor the Financial Square
Prime Obligations Fund makes foreign investments. The investments of the
Financial Square Prime Obligations Fund are limited by SEC regulations
applicable to money market funds as described in its prospectus, and do not
include many of the types of investments discussed below that are permitted
for the other Underlying Funds. With these exceptions, and the further
exceptions noted below, the following description applies generally to the
Underlying Funds.
 
                      (1) DESCRIPTION OF INVESTMENTS AND
                 INVESTMENT TECHNIQUES OF THE UNDERLYING FUNDS
 
CONVERTIBLE SECURITIES
 
  The Underlying Funds may invest in convertible securities, including debt
obligations and preferred stock of the issuer convertible at a stated exchange
rate into common stock of the issuer. Convertible securities generally offer
lower interest or dividend yields than non-convertible securities of similar
quality. As with all fixed-income securities, the market value of convertible
securities tends to decline as interest rates increase and, conversely, to
increase as interest rates decline. However, when the market price of the
common stock underlying a convertible security exceeds the conversion price,
the convertible security tends to reflect the market price of the underlying
common stock. As the market price of the underlying common stock declines, the
convertible security tends to trade increasingly on a yield basis, and thus
may not decline in price to the same extent as the underlying common stock.
Convertible securities rank senior to common stocks in an issuer's capital
structure and consequently entail less risk than the issuer's common stock. In
evaluating a convertible security, the investment adviser will give primary
emphasis to the attractiveness of the underlying common stock. The convertible
securities in which certain of the Underlying Funds invest are not subject to
any minimum rating criteria. Convertible debt securities are equity
investments for purposes of each Underlying Funds's investment policies.
 
PREFERRED STOCK, WARRANTS AND RIGHTS
 
  The Underlying Funds may invest in preferred stock, warrants and rights.
Preferred stocks are securities that represent an ownership interest providing
the holder with claims on the issuer's earnings and assets before common stock
owners but after bond owners. Unlike debt securities, the obligations of an
issuer of preferred stock, including dividend and other payment obligations,
may not typically be accelerated by the holders of such preferred stock on the
occurrence of an event of default (such as a covenant default or filing of a
bankruptcy petition) or other non-compliance by the issuer with the terms of
the preferred stock.
 
  Warrants and other rights are options to buy a stated number of shares of
common stock at a specified price during the life of the warrant. The holders
of warrants and rights have no voting rights, receive no dividends and have no
rights with respect to the assets of the issuer.
 
                                      A-1
<PAGE>
 
REAL ESTATE INVESTMENT TRUSTS ("REITS")
 
  The Real Estate Securities Fund expects to invest a substantial portion of
its total assets in REITs, which are pooled investment vehicles that invest
primarily in either real estate or real estate related loans. In addition, the
other Underlying Equity Funds may invest in REITs from time to time. REITs are
dependent upon the ability of the REITs' managers, and are subject to heavy
cash flow dependency, default by borrowers and the qualification of the REITs
under applicable regulatory requirements for favorable federal income tax
treatment. REITs are also subject to risks generally associated with
investments in real estate including possible declines in the value of real
estate, general and local economic conditions, environmental problems and
changes in interest rates. To the extent that assets underlying a REIT are
concentrated geographically, by property type or in certain other respects,
these risks may be heightened. Each Underlying Fund will indirectly bear its
proportionate share of any expenses, including management fees, paid by a REIT
in which it invests.
 
FOREIGN INVESTMENTS
 
  Foreign Securities.  Certain of the Underlying Funds may invest in foreign
securities in accordance with their investment objectives and policies.
Investing in the securities of foreign issuers involves risks that are not
typically associated with investing in securities of domestic issuers quoted
in U.S. dollars. Such investments may be affected by changes in currency
rates, changes in foreign or U.S. laws or restrictions applicable to such
investments and in exchange control regulations (e.g., currency blockage). A
decline in the exchange rate of the currency (i.e., weakening of the currency
against the U.S. dollar) in which a portfolio security is quoted or
denominated relative to the U.S. dollar would reduce the value of the
portfolio security. The expected introduction of a single currency, the euro,
on January 1, 1999 for participating European nations in the Economic and
Monetary Union ("EU") presents unique uncertainties, including whether the
payment and operational systems of banks and other financial institutions will
be ready by the scheduled launch date; the creation of suitable clearing and
settlement payment systems for the new currency; the legal treatment of
certain outstanding financial contracts after January 1, 1999 that refer to
existing currencies rather than the euro; the establishment and maintenance of
exchange rates for currencies being converted into the euro and the euro; the
fluctuation of the euro relative to non-euro currencies during the transition
period from January 1, 1999 to December 31, 2000 and beyond; whether the
interest rate, tax and labor regimes of European countries participating in
the euro will converge over time; and whether the conversion of the currencies
of the other EU countries such as the United Kingdom, Denmark and Greece into
the euro and the admission of other non-EU countries such as Poland, Latvia
and Lithuania as members of the EU may have an impact on the euro. These or
other factors, including political and economic risks, could cause market
disruptions before or after the introduction of the euro, and could adversely
affect the value of securities and foreign currencies held by the Underlying
Funds. Commissions on transactions in foreign securities may be higher than
those for similar transactions on domestic stock markets. In addition,
clearance and settlement procedures may be different in foreign countries and,
in certain markets, such procedures have been unable to keep pace with the
volume of securities transactions, thus making it difficult to conduct such
transactions.
 
  Foreign issuers are not generally subject to uniform accounting, auditing
and financial reporting standards comparable to those applicable to U.S.
issuers. There may be less publicly available information about a foreign
issuer than about a U.S. issuer. In addition, there is generally less
government regulation of foreign markets, companies and securities dealers
than in the United States. Foreign securities markets may have substantially
less volume than U.S. securities markets and securities of many foreign
issuers are less liquid and more volatile than securities of comparable
domestic issuers. Furthermore, with respect to certain foreign countries,
there is a possibility of nationalization, expropriation or confiscatory
taxation, imposition of withholding or other taxes on
 
                                      A-2
<PAGE>
 
dividend or interest payments (or, in some cases, capital gains), limitations
on the removal of funds or other assets of the Underlying Funds, political or
social instability or diplomatic developments which could affect investments
in those countries.
 
 
  Investments in ADRs, EDRs, and GDRs. Investments in foreign securities may
take the form of sponsored and unsponsored American Depository Receipts
("ADRs"), Global Depository Receipts ("GDRs"), European Depository Receipts
("EDRs") or other similar instruments representing securities of foreign
issuers (together, "Depository Receipts"). ADRs represent the right to receive
securities of foreign issuers deposited in a domestic bank or a correspondent
bank. Prices of ADRs are quoted in U.S. dollars, and ADRs are traded in the
United States on exchanges or over-the-counter and are sponsored and issued by
domestic banks. EDRs and GDRs are receipts evidencing an arrangement with a
non-U.S. bank. EDRs and GDRs are not necessarily quoted in the same currency
as the underlying security. To the extent a Fund acquires Depository Receipts
through banks which do not have a contractual relationship with the foreign
issuer of the security underlying the Depository Receipts to issue and service
such Depository Receipts (unsponsored Depository Receipts), there may be an
increased possibility that the Underlying Fund would not become aware of and
be able to respond to corporate actions, such as stock splits or rights
offerings involving the foreign issuer, in a timely manner. In addition, the
lack of information may result in inefficiencies in the valuation of such
instruments. Investment in Depository Receipts does not eliminate all the
risks inherent in investing in securities of non-U.S. issuers. The market
value of Depository Receipts is dependent upon the market value of the
underlying securities and fluctuations in the relative value of the currencies
in which the Depository Receipts and the underlying securities are quoted.
However, by investing in Depository Receipts, such as ADRs, that are quoted in
U.S. dollars, the Underlying Funds may avoid currency risks during the
settlement period for purchases and sales.
 
  Foreign Currency Transactions. Because investment in foreign issuers will
usually involve currencies of foreign countries, and because certain
Underlying Funds may have currency exposure independent of their securities
positions, the value of the assets of the Underlying Fund as measured in U.S.
dollars will be affected by changes in foreign currency exchange rates. The
Underlying Fund may, to the extent it invests in foreign securities, purchase
or sell foreign currencies on a spot basis and may also purchase or sell
forward foreign currency exchange contracts for hedging purposes and to seek
to protect against anticipated changes in future foreign currency exchange
rates. In addition, the Core Fixed Income, Global Income, High Yield, CORE
International Equity, International Equity, Japanese Equity, International
Small Cap, Emerging Markets Equity and Asia Growth Funds may enter into such
contracts to seek to increase total return when the Underlying Fund's
investment adviser anticipates that the foreign currency will appreciate or
depreciate in value, but securities denominated or quoted in that currency do
not present attractive investment opportunities and are not held in the
Underlying Fund's portfolio. When entered into to seek to enhance return,
forward foreign currency exchange contracts are considered speculative.
Certain Underlying Funds may also engage in cross-hedging by using forward
contracts in a currency different from that in which the hedged security is
denominated or quoted if the Underlying Fund's investment adviser determines
that there is a pattern of correlation between the two currencies.
 
  An Underlying Fund will incur costs in connection with conversions between
various currencies. An Underlying Fund may hold foreign currency received in
connection with investments in foreign securities when, in the judgment of its
investment adviser, it would be beneficial to convert such currency into U.S.
dollars at a later date, based on anticipated changes in the relevant exchange
rates.
 
  Currency exchange rates may fluctuate significantly over short periods of
time causing, along with other factors, an Underlying Fund's net asset value
to fluctuate. Currency exchange rates generally are determined by the forces
of supply and demand in the foreign exchange markets and the relative merits
of investments in
 
                                      A-3
<PAGE>
 
different countries, actual or anticipated changes in interest rates and other
complex factors, as seen from an international perspective. Currency exchange
rates also can be affected unpredictably by the intervention of U.S. or
foreign governments or central banks or the failure to intervene or by
currency controls or political developments in the U.S. or abroad.
 
  Certain of the Underlying Funds may enter into currency swaps, which involve
the exchange by the Underlying Fund with another party for their respective
rights to make or receive payments in specified currencies. Currency swaps
usually involve the delivery of a gross payment stream in one designated
currency in exchange for the gross payment stream in another designated
currency. Therefore, the entire payment stream under a currency swap is
subject to the risk that the other party to the swap will default on its
contractual delivery obligations.
 
  The market in forward foreign currency exchange contracts, currency swaps
and other privately negotiated currency instruments offers less protection
against defaults by the other party to such instruments than is available for
currency instruments traded on an exchange. Such contracts are subject to the
risk that the counterparty to the contract will default on its obligations.
Since these contracts are not guaranteed by an exchange or clearinghouse, a
default on the contract would deprive an Underlying Fund of unrealized profits
or the benefits of a currency hedge or force the Underlying Fund to cover its
purchase or sale commitments, if any, at the current market price.
 
FIXED-INCOME SECURITIES
 
  U.S. Government Securities. The Underlying Funds may invest in U.S.
Government securities. Generally, these securities include U.S. Treasury
obligations and obligations issued or guaranteed by U.S. Government agencies,
instrumentalities or sponsored enterprises. U.S. Government securities also
include Treasury receipts and other stripped U.S. Government securities, where
the interest and principal components of stripped U.S. Government securities
are traded independently.
 
  Foreign Government Securities. The Core Fixed Income, Global Income, High
Yield, CORE International Equity, International Equity, Japanese Equity,
International Small Cap, Emerging Markets Equity and Asia Growth Funds may
invest in debt obligations of foreign governments and governmental agencies,
including those of Emerging Countries. Investment in sovereign debt
obligations involves special risks not present in debt obligations of
corporate issuers. The issuer of the debt or the governmental authorities that
control the repayment of the debt may be unable or unwilling to repay
principal or interest when due in accordance with the terms of such debt, and
the Underlying Fund may have limited recourse in the event of a default.
Periods of economic uncertainty may result in the volatility of market prices
of sovereign debt, and in turn the Underlying Fund's NAV, to a greater extent
than the volatility inherent in debt obligations of U.S. issuers. A sovereign
debtor's willingness or ability to repay principal and pay interest in a
timely manner may be affected by, among other factors, its cash flow
situation, the extent of its foreign currency reserves, the availability of
sufficient foreign exchange on the date a payment is due, the relative size of
the debt service burden to the economy as a whole, the sovereign debtor's
policy toward international lenders and the political constraints to which a
sovereign debtor may be subject.
 
  Mortgage-Backed Securities. The Underlying Funds (other than the four CORE
Equity Funds) may invest in mortgage-backed securities ("Mortgage-Backed
Securities"), which represent direct or indirect participations in, or are
collateralized by and payable from, mortgage loans secured by real property.
Therefore, Mortgage-Backed Securities are often subject to more rapid
repayment than their stated maturity date would indicate as a
 
                                      A-4
<PAGE>
 
result of principal prepayments on the underlying loans. This can result in
significantly greater price and yield volatility than is the case with
traditional fixed-income securities. During periods of declining interest
rates, prepayments can be expected to accelerate, and thus impair a Fund's
ability to reinvest the returns of principal at comparable yields. Conversely,
in a rising interest rate environment, a declining prepayment rate will extend
the average life of many Mortgage-Backed Securities and prevent the Underlying
Fund from taking advantage of such higher yields.
 
  Adjustable Rate Mortgage-Backed Securities ("ARMS"). ARMs allow a Fund to
participate in increases in interest rates through periodic increases in the
securities' coupon rates. During periods of declining interest rates, coupon
rates may readjust downward resulting in lower yields to the Underlying Fund.
Therefore, the value of an ARM is unlikely to rise during periods of declining
interest rates to the same extent as fixed-rate securities. Interest rate
declines may result in accelerated prepayment of mortgages with the result
that proceeds from prepayments will be reinvested at lower interest rates.
During periods of rising interest rates, changes in the coupon rate will lag
behind changes in the market rate. ARMs are also typically subject to maximum
increases and decreases in the interest rate adjustment which can be made on
any one adjustment date, in any one year, or during the life of the security.
In the event of dramatic increases or decreases in prevailing market interest
rates, the value of the Underlying Fund's investments in ARMs may fluctuate
more substantially since these limits may prevent the security from fully
adjusting its interest rate to the prevailing market rates.
 
  The Underlying Funds may invest in Mortgage-Backed Securities issued or
sponsored by both government and non-governmental entities. Privately issued
Mortgage-Backed Securities are generally backed by pools of conventional
(i.e., non-government guaranteed or insured) mortgage loans. In order to
receive a high quality rating from the rating organizations (e.g, S&P or
Moody's), privately issued Mortgaged-Backed Securities normally are structured
with one or more types of "credit enhancement."
 
  The Underlying Funds may also invest in multiple class securities, including
collateralized mortgage obligations ("CMOs") and Real Estate Mortgage
Investment Conduit ("REMIC") pass-through or participation certificates. CMOs
provide an investor with a specified interest in the cash flow from a pool of
underlying mortgages or of other Mortgage-Backed Securities. CMOs are issued
in multiple classes, each with a specified fixed or floating interest rate and
a final scheduled distribution date. In most cases, payments of principal are
applied to the CMO classes in the order of their respective stated maturities,
so that no principal payments will be made on a CMO class until all other
classes having an earlier stated maturity date are paid in full. A REMIC is a
CMO that qualifies for special tax treatment under the Code, and invests in
certain mortgages principally secured by interests in real property and other
permitted investments.
 
  The Underlying Fixed-Income Funds may also invest in stripped Mortgage-
Backed Securities ("SMBS") (including interest only and principal only
securities), which are derivative multiple class Mortgage-Backed Securities.
SMBS are usually structured with two different classes: one that receives 100%
of the interest payments and the other that receives 100% of the principal
payments from a pool of mortgage loans. If the underlying mortgage loans
experience different than anticipated prepayments of principal, a Fund may
fail to fully recoup its initial investment in these securities. The market
value of the class consisting entirely of principal payments generally is
unusually volatile in response to changes in interest rates. The yields on a
class of SMBS that receives all or most of the interest from mortgage loans
are generally higher than prevailing market yields on other Mortgage-Backed
Securities because their cash flow patterns are more volatile and there is a
greater risk that the initial investment will not be fully recouped.
 
  Because derivative Mortgage-Backed Securities (such as principal-only (POs),
interest-only (IOs) or inverse floating rate securities) are more exposed to
mortgage prepayments, they generally involve a greater amount of
 
                                      A-5
<PAGE>
 
risk. Small changes in prepayments can significantly impact the cash flow and
the market value of these securities. The risk of faster than anticipated
prepayments generally adversely affects IOs, super floaters and premium priced
Mortgage-Backed Securities. The risk of slower than anticipated prepayments
generally adversely affects POs, floating-rate securities subject to interest
rate caps, support tranches and discount priced Mortgage-Backed Securities. In
addition, particular derivative securities may be leveraged such that their
exposure (i.e., price sensitivity) to interest rate and/or prepayment risk is
magnified.
 
  Asset-Backed Securities. The Underlying Funds (other than the four CORE
Equity Funds, the Adjustable Rate Government Fund and the Short Duration
Government Fund) may also invest in asset-backed securities ("Asset-Backed
Securities"). The principal and interest payments on Asset-Backed Securities
are collateralized by pools of assets such as auto loans, credit card
receivables, leases, installment contracts and personal property. Such asset
pools are securitized through the use of special purpose trusts or
corporations. Principal and interest payments may be credit enhanced by a
letter of credit, a pool insurance policy or a senior/subordinated structure.
 
  Corporate and Bank Obligations. The Underlying Funds may invest in
obligations issued or guaranteed by U.S. or foreign corporations and banks.
Banks are subject to extensive but different governmental regulations which
may limit both the amount and types of loans which may be made and interest
rates which may be charged. In addition, the profitability of the banking
industry is largely dependent upon the availability and cost of funds for the
purpose of financing lending operations under prevailing money market
conditions. General economic conditions as well as exposure to credit losses
arising from possible financial difficulties of borrowers play an important
part in the operation of this industry.
 
  Structured Securities. The Underlying Funds may invest in structured
securities. The value of the principal of and/or interest on such securities
is determined by reference to changes in the value of specific currencies,
interest rates, commodities, indices or other financial indicators (the
"Reference") or the relative change in two or more References. The interest
rate or the principal amount payable upon maturity or redemption may be
increased or decreased depending upon changes in the applicable Reference. The
terms of the structured securities may provide that in certain circumstances
no principal is due at maturity and, therefore, result in the loss of the
Underlying Fund's investment. Structured securities may be positively or
negatively indexed, so that appreciation of the Reference may produce an
increase or decrease in the interest rate or value of the security at
maturity. In addition, changes in the interest rates or the value of the
security at maturity may be a multiple of changes in the value of the
Reference. Consequently, structured securities may entail a greater degree of
market risk than other types of fixed-income securities. Structured securities
may also be more volatile, less liquid and more difficult to accurately price
than less complex securities.
 
  Municipal Securities. The Core Fixed Income and High Yield Funds may make
limited investments in instruments issued by state and local governmental
issuers. These securities may include private activity bonds, municipal
leases, certificates of participation and "auction rate" securities.
 
  Zero Coupon, Deferred Interest, Pay-In-Kind and Capital Appreciation
Bonds. Each Underlying Fund may invest in zero coupon, deferred interest and
capital appreciation bonds. These are securities issued at a discount from
their face value because interest payments are typically postponed until
maturity. These securities also may take the form of debt securities that have
been stripped of their interest payments. Each Underlying Fund may also invest
in pay-in-kind securities which are securities that have interest payable by
the delivery of additional securities. The market prices of zero coupon,
deferred interest, pay-in-kind and capital appreciation bonds generally are
more volatile than the market prices of interest-bearing securities and are
likely to respond to a greater degree to changes in interest rates than
interest-bearing securities having similar maturities and credit quality.
 
                                      A-6
<PAGE>
 
  Rating Criteria. The rating requirements for each of the Underlying Fixed-
Income Funds are stated above. Except as noted below, the Underlying Equity
Funds (other than the four CORE Equity Funds, which only invest in debt
instruments that are cash equivalents) may invest in debt securities rated at
least investment grade at the time of investment. Investment grade debt
securities are securities rated BBB or higher by Standard & Poor's or Baa or
higher by Moody's. The Growth and Income, Capital Growth, Small Cap Value,
International Equity, Japanese Equity, International Small Cap, Emerging
Markets Equity, Asia Growth and Real Estate Securities Funds may invest up to
10%, 10%, 35%, 35%, 35%, 35%, 35%, 35% and 20%, respectively, of their total
assets in debt securities which are rated in the lowest rating categories by
Standard & Poor's or Moody's (i.e., BB or lower by Standard & Poor's or Ba or
lower by Moody's), including securities rated D by Moody's or Standard &
Poor's. The Mid Cap Equity Fund may invest up to 10% of its total assets in
below investment grade debt securities rated B or higher by Standard & Poor's
or Moody's. Fixed-income securities rated BB or Ba or below (or comparable
unrated securities) are commonly referred to as "junk bonds," are considered
predominately speculative and may be questionable as to principal and interest
payments as described further below under "Risks of Investing in Non-
Investment Grade Fixed-Income Securities." See Appendix A to the Additional
Statement for a description of the corporate bond ratings assigned by Standard
& Poor's and Moody's.
 
OPTIONS ON SECURITIES AND SECURITIES INDICES
 
  The Underlying Funds (other than the CORE U.S. Equity and CORE Large Cap
Growth Funds) may write (sell) covered call and put options and purchase call
and put options on any securities in which it may invest or on any securities
index comprised of securities in which it may invest. The writing and purchase
of options is a highly specialized activity which involves investment
techniques and risks different from those associated with ordinary portfolio
securities transactions. The use of options to seek to increase total return
involves the risk of loss if the Underlying Fund's investment adviser is
incorrect in its expectation of fluctuations in securities prices or interest
rates. The successful use of options for hedging purposes also depends in part
on the ability of the investment adviser to manage future price fluctuations
and the degree of correlation between the options and securities markets. If
the investment adviser is incorrect in its expectation of changes in
securities prices or determination of the correlation between the securities
indices on which options are written and purchased and the securities in the
Underlying Fund's investment portfolio, the investment performance of the
Underlying Fund will be less favorable than it would have been in the absence
of such options transactions. The writing of options could significantly
increase the Underlying Fund's portfolio turnover rate and, therefore,
associated brokerage commissions or spreads.
 
OPTIONS ON FOREIGN CURRENCIES
 
  An Underlying Fund may, to the extent it invests in foreign securities,
purchase and sell (write) call and put options on foreign currencies for the
purpose of protecting against declines in the U.S. dollar value of foreign
portfolio securities and anticipated dividends on such securities and against
increases in the U.S. dollar cost of foreign securities to be acquired. In
addition, certain Underlying Funds may use options on currency to cross-hedge,
which involves writing or purchasing options on one currency to hedge against
changes in exchange rates for a different currency, if there is a pattern of
correlation between the two currencies. As with other kinds of options
transactions, however, the writing of an option on a foreign currency will
constitute only a partial hedge, up to the amount of the premium received. If
an option that the Underlying Fund has written is exercised, the Underlying
Fund could be required to purchase or sell foreign currencies at
disadvantageous exchange rates, thereby incurring losses. The purchase of an
option on foreign currency may constitute an effective hedge against exchange
rate fluctuations; however, in the event of exchange rate movements adverse to
the Underlying Fund's position, the Underlying Fund may forfeit the entire
amount of the premium plus related transaction costs. In
 
                                      A-7
<PAGE>
 
addition to purchasing call and put options for hedging purposes, the Core
Fixed Income, Global Income, High Yield, CORE International Equity,
International Equity, Japanese Equity, International Small Cap, Emerging
Markets Equity and Asia Growth Funds may purchase call or put options on
currency to seek to increase total return when the Underlying Fund's
investment adviser anticipates that the currency will appreciate or depreciate
in value, but the securities quoted or denominated in that currency do not
present attractive investment opportunities and are not held in the Underlying
Fund's portfolio. When purchased or sold to seek to increase total return,
options on currencies are considered speculative. Options on foreign
currencies written or purchased by the Underlying Funds are traded on U.S. and
foreign exchanges or over-the-counter.
 
FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS
 
  To seek to increase total return or to hedge against changes in interest
rates, securities prices or currency exchange rates, an Underlying Fund may
purchase and sell various kinds of futures contracts, and purchase and write
call and put options on any of such futures contracts. Each Underlying Fund
may also enter into closing purchase and sale transactions with respect to any
such contracts and options.
 
  The futures contracts may be based on various securities (such as U.S.
Government securities), foreign currencies, securities indices and other
financial instruments and indices, whether domestic or foreign. An Underlying
Fund will engage in futures and related options transactions for bona fide
hedging purposes as defined in regulations of the Commodity Futures Trading
Commission or to seek to increase total return to the extent permitted by such
regulations. The Underlying Fund may not purchase or sell futures contracts or
purchase or sell related options to seek to increase total return, except for
closing purchase or sale transactions, if immediately thereafter the sum of
the amount of initial margin deposits and premiums paid on the Underlying
Fund's outstanding positions in futures and related options entered into for
the purpose of seeking to increase total return would exceed 5% of the market
value of the Underlying Fund's net assets. These transactions involve
brokerage costs, require margin deposits and, in the case of contracts and
options obligating the Underlying Fund to purchase securities or currencies,
require the Underlying Fund to segregate and maintain cash or liquid assets
with a value equal to the amount of the Underlying Fund's obligations or to
otherwise cover the obligations in a manner permitted by the SEC.
 
  While transactions in futures contracts and options on futures may reduce
certain risks, such transactions themselves entail certain other risks. See
"Investment Objectives and Policies--Futures Contracts and Options on Future
Contracts" in the Additional Statement. Thus, while the Underlying Fund may
benefit from the use of futures and options on futures, unanticipated changes
in interest rates, securities prices or currency exchange rates may result in
poorer overall performance than if the Underlying Fund had not entered into
any futures contracts or options transactions. Because perfect correlation
between a futures position and portfolio position that is intended to be
protected is impossible to achieve, the desired protection may not be obtained
and the Underlying Fund may be exposed to risk of loss. The loss incurred by
the Underlying Fund in entering into futures contracts and in writing call
options on futures is potentially unlimited and may exceed the amount of the
premium received. Futures markets are highly volatile and the use of futures
may increase the volatility of the Underlying Fund's NAV. The profitability of
the Underlying Fund's trading in futures to seek to increase total return
depends upon the ability of the investment adviser to analyze correctly the
futures markets. In addition, because of the low margin deposits normally
required in futures trading, a relatively small price movement in a futures
contract may result in substantial losses to the Underlying Fund. Further,
futures contracts and options on futures may be illiquid, and exchanges may
limit fluctuations in futures contract prices during a single day. The
Underlying Funds may engage in futures transactions on both U.S. and foreign
exchanges. Foreign exchanges may not provide the same protections as U.S.
exchanges.
 
                                      A-8
<PAGE>
 
STANDARD AND POOR'S DEPOSITORY RECEIPTS
 
  Each Underlying Equity Fund may, consistent with its objectives, purchase
Standard & Poor's Depository Receipts ("SPDRs"). SPDRs are American Stock
Exchange-traded securities that represent ownership in the SPDR Trust, a trust
which has been established to accumulate and hold a portfolio of common stocks
that is intended to track the price performance and dividend yield of the S&P
500. This trust is sponsored by a subsidiary of the American Stock Exchange.
SPDRs may be used for several reasons, including but not limited to:
facilitating the handling of cash flows or trading, or reducing transaction
costs. The use of SPDRs would introduce additional risks to the portfolio as
the price movement of the instrument does not perfectly correlate with the
price action of the underlying index.
 
EQUITY SWAPS
 
  Each Underlying Equity Fund may invest up to 10% of its total assets in
equity swaps. Equity swaps allow the parties to a swap agreement to exchange
the dividend income or other components of return on an equity investment
(e.g., a group of equity securities or an index) for a component of return on
another non-equity or equity investment. An equity swap may be used by a Fund
to invest in a market without owning or taking physical custody of securities
in circumstances in which direct investment may be restricted for legal
reasons or is otherwise impractical. Equity swaps are derivatives and their
value can be very volatile. To the extent that its Investment Advisor does not
accurately analyze and predict the potential relative fluctuation of the
components swapped with another party, a Fund may suffer a loss. The value of
some components of an equity swap (such as the dividends on a common stock)
may also be sensitive to changes in interest rates. Furthermore, during the
period a swap is outstanding, a Fund may suffer a loss if the counterparty
defaults. In connection with its investments in equity swaps, a Fund will
either segregate cash or liquid assets or otherwise cover its obligations in a
manner required by the SEC.
 
WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS
 
  The Underlying Funds may purchase when-issued securities. When-issued
transactions arise when securities are purchased by the Underlying Fund with
payment and delivery taking place in the future in order to secure what is
considered to be an advantageous price and yield to the Underlying Fund at the
time of entering into the transaction. Each Underlying Fund may also purchase
or sell securities on a forward commitment basis; that is, make contracts to
purchase or sell securities for a fixed price at a future date beyond the
customary three-day settlement period. The purchase of securities on a when-
issued or forward commitment basis involves a risk of loss if the value of the
security to be purchased declines prior to the settlement date. Conversely,
securities sold on a forward commitment basis involve the risk that the value
of the securities to be sold may increase prior to the settlement date.
Although the Underlying Fund would generally purchase securities on a when-
issued or forward commitment basis with the intention of acquiring securities
for its portfolio, the Underlying Fund may dispose of when-issued securities
or forward commitments prior to settlement if its investment adviser deems it
appropriate to do so. The Underlying Fund will segregate cash or liquid assets
in an amount sufficient to meet the purchase price until three days prior to
the settlement date. Alternatively, each Underlying Fund may enter into
offsetting contracts for the forward sale of other securities that it owns.
 
ILLIQUID AND RESTRICTED SECURITIES
 
  No Underlying Fund will invest more than 15% (10% in the case of the
Financial Square Prime Obligations Fund) of its net assets in illiquid
investments, which include securities (both foreign and domestic) that are not
readily marketable, swap transactions, certain SMBS, repurchase agreements
maturing in more than seven days, time deposits with a notice or demand period
of more than seven days, certain over-the-counter options and certain
restricted securities, unless it is determined, based upon the continuing
review of the trading markets for
 
                                      A-9
<PAGE>
 
a specific restricted security, that such restricted security is eligible for
resale under Rule 144A under the Securities Act of 1933 and, therefore, is
liquid. Investing in restricted securities eligible for resale pursuant to
Rule 144A may decrease the liquidity of an Underlying Fund's portfolio to the
extent that qualified institutional buyers become for a time uninterested in
purchasing these restricted securities. The purchase price and subsequent
valuation of restricted and illiquid securities normally reflect a discount,
which may be significant, from the market price of comparable securities for
which a market exists.
 
REPURCHASE AGREEMENTS
 
  The Underlying Funds may enter into repurchase agreements with dealers in
U.S. Government securities and member banks of the Federal Reserve System
which furnish collateral at least equal in value or market price to the amount
of their repurchase obligation. The Core Fixed Income, Global Income, High
Yield, CORE International Equity, International Equity, Japanese Equity,
International Small Cap, Emerging Markets Equity and Asia Growth Funds may
also enter into repurchase agreements involving certain foreign government
securities. If the other party or "seller" defaults, the Underlying Fund might
suffer a loss to the extent that the proceeds from the sale of the underlying
securities and other collateral are less than the repurchase price. In
addition, in the event of bankruptcy of the seller or failure of the seller to
repurchase the securities as agreed, the Underlying Fund could suffer losses,
including loss of interest on or principal of the security and costs
associated with delay and enforcement of the repurchase agreement. Each
Underlying Fund, together with other registered investment companies having
management agreements with GSAM or its affiliates, may transfer uninvested
cash balances into a single joint account, the daily aggregate balance of
which will be invested in one or more repurchase agreements.
 
LENDING OF PORTFOLIO SECURITIES
 
  The Underlying Funds may also seek to increase its income by lending
portfolio securities. Under present regulatory policies, such loans may be
made to institutions, such as certain broker-dealers, and are required to be
secured continuously by collateral in cash, cash equivalents, or U.S.
Government securities maintained on a current basis in an amount at least
equal to the market value of the securities loaned. Cash collateral may be
invested in cash equivalents. The value of the securities loaned may not
exceed 33 1/3% of the value of the total assets of an Underlying Fund
(including the loan collateral). A loss or delay in the recovery of securities
could result if the institution which borrows securities breaches its
agreement with the Underlying Fund.
 
SHORT SALES AGAINST-THE-BOX
 
  Certain Underlying Funds may make short sales of securities or maintain a
short position, provided that at all times when a short position is open the
Underlying Fund owns an equal amount of such securities or securities
convertible into or exchangeable, without payment of any further
consideration, for an equal amount of the securities of the same issuer as the
securities sold short (a short sale against-the-box). Not more than 25% of the
Underlying Fund's net assets (determined at the time of the short sale) may be
subject to such short sales.
 
MORTGAGE DOLLAR ROLLS
 
  The Underlying Fixed-Income Funds (except the High Yield Fund) and the Real
Estate Securities Fund may enter into mortgage "dollar rolls" in which the
Underlying Fund sells securities for delivery in the current month and
simultaneously contracts with the same counterparty to repurchase
substantially similar but not identical securities on a specified future date.
During the roll period, the Underlying Fund loses the right to receive
principal and interest paid on the securities sold. However, the Underlying
Fund would benefit to the extent of any difference between the price received
for the securities sold and the lower forward price for the future
 
                                     A-10
<PAGE>
 
purchase or fee income plus the interest earned on the cash proceeds of the
securities sold until the settlement date for the forward purchase. Unless
such benefits exceed the income, capital appreciation and gain or loss due to
mortgage prepayments that would have been realized on the securities sold as
part of the mortgage dollar roll, the use of this technique will diminish the
investment performance of the Underlying Fund.
 
TEMPORARY INVESTMENTS
 
  Each Underlying Fund may, for temporary defensive purposes, invest 100% of
its total assets (except that the CORE Equity Funds and Emerging Markets
Equity Fund may only hold up to 35% of their respective total assets) in high
quality fixed income securities. When assets are invested in such instruments,
an Underlying Fund may not be achieving its investment objective.
 
PORTFOLIO TURNOVER
 
  The turnover rates of the Underlying Funds have ranged from 41% to 396%
during their most recent fiscal years. There can be no assurance that the
turnover rates of these Underlying Funds will remain with this range during
subsequent fiscal years. Higher turnover rates may result in higher brokerage
costs and higher expenses being incurred by the Underlying Funds. In addition,
higher turnover rates may result in higher taxable realized gains being
incurred by shareholders.
 
MISCELLANEOUS TECHNIQUES
 
  In addition to the techniques and investments described above, each
Underlying Fund may engage in the following techniques and investments: (i)
mortgage swaps, credit swaps, index swaps and interest rate swaps, caps,
floors and collars (Underlying Fixed-Income Funds and Real Estate Securities
Fund only), (ii) yield curve options and inverse floating rate securities
(Underlying Fixed-Income Funds and Real Estate Securities Fund only), (iii)
loan participations (High Yield Fund only), (iv) other investment companies,
(v) unseasoned companies, (vi) custodial receipts, and (vii) reverse
repurchase agreements for investment purposes (Underlying Fixed-Income Funds
only).
 
  In addition, each Underlying Fund may borrow up to 33 1/3% of its total
assets from banks for temporary or emergency purposes. An Underlying Fund may
not make additional investments if borrowings (excluding covered mortgage
dollar rolls) exceed 5% of its total assets.
 
                      (2) RELATED ADDITIONAL RISK FACTORS
 
RISKS OF INVESTING IN SMALL CAPITALIZATION COMPANIES AND REITS
 
  Investing in the securities of small capitalization companies and REITs
involves greater risk and the possibility of greater portfolio price
volatility. Among the reasons for the greater price volatility of these
securities are the less certain growth prospects of smaller firms and the
lower degree of liquidity in the markets for such securities. Small
capitalization companies and REITs may have limited financial resources, may
trade less frequently and in a limited volume and may be subject to more
abrupt or erratic price movements than larger capitalization companies. An
Underlying Fund may invest in securities of small capitalization companies and
REITs that have experienced financial difficulties or are in an early
development stage. Other risks associated with REITs are discussed in this
Appendix A under "Real Estate Investment Trust ("REITs')."
 
SPECIAL RISKS OF INVESTMENTS IN THE ASIAN AND OTHER EMERGING MARKETS
 
  Investing in the securities of issuers in Emerging Countries involves risks
in addition to those discussed in this Appendix A under "Foreign Investments."
The International Equity, International Small Cap, Emerging
 
                                     A-11
<PAGE>
 
Markets Equity and Asia Growth Funds may each invest without limit in the
securities of issuers in Emerging Countries. Up to 35% of the total assets of
the Emerging Markets Equity Fund may be invested in securities of issuers in
any one Emerging Country. The Growth and Income, Small Cap Value, Mid Cap
Equity, High Yield and CORE International Equity Funds may each invest up to
25%, and the Core Fixed Income, Global Income and Capital Growth Funds may
each invest up to 10%, of their respective total assets in securities of
issuers in Emerging Countries.
 
  Many Emerging Countries are subject to a greater degree of economic,
political and social instability than is the case in Western Europe, the
United States, Canada, Australia, New Zealand and Japan. The governments of
some Emerging Countries are authoritarian in nature or have been installed or
removed as a result of military coups, while governments in other Emerging
Countries have periodically used force to suppress civil dissent. Disparities
of wealth, the pace and success of democratization, and ethnic, religious and
racial disaffection, among other factors, have also led to social unrest,
violence and/or labor unrest in some Asian and other Emerging Countries.
Investing in Emerging Countries involves the risk of loss due to
expropriation, nationalization, confiscation of assets and property or the
imposition of restrictions on foreign investments and on repatriation of
capital invested. Many Emerging Countries have experienced currency
devaluations and substantial and, in some cases, extremely high rates of
inflation, which have a negative effect on the economies and securities
markets of such Emerging Countries. Economies in Emerging Countries generally
are dependent heavily upon commodity prices and international trade and,
accordingly, have been and may continue to be affected adversely by the
economies of their trading partners, trade barriers, exchange controls,
managed adjustments in relative currency values and other protectionist
measures imposed or negotiated by the countries with which they trade.
 
  The securities markets of Emerging Countries are marked by a high
concentration of market capitalization and trading volume in a small number of
issuers representing a limited number of industries, as well as a high
concentration of ownership of such securities by a limited number of
investors. The Underlying Fund's purchase and sale of portfolio securities in
certain Emerging Countries may be constrained by limitations as to daily
changes in the prices of listed securities, periodic trading or settlement
volume and/or limitations on aggregate holdings of foreign investors. In
addition, settlement procedures in Emerging Countries are frequently less
developed and reliable than those in the United States and may involve the
Underlying Fund's delivery of securities before receipt of payment for their
sale. Significant delays are common in certain markets in registering the
transfer of securities. Settlement or registration problems may make it more
difficult for the Underlying Fund to value its portfolio securities and could
cause the Underlying Fund to miss attractive investment opportunities, to have
a portion of its assets uninvested or to incur losses due to the failure of a
counterparty to pay for securities the Underlying Fund has delivered or the
Underlying Fund's inability to complete its contractual obligations.
 
RISKS OF INVESTING IN FIXED-INCOME SECURITIES
 
  The Financial Square Prime Obligations Fund attempts to maintain a stable
NAV of $1.00 per Share and values its assets using the amortized cost method
in accordance with SEC regulations. There is no assurance, however, that the
Financial Square Prime Obligations Fund will be successful in maintaining its
per share value at $1.00 on a continuous basis. The per share NAVs of the
other Underlying Funds are expected to fluctuate on a daily basis.
 
  When interest rates decline, the market value of fixed-income securities
tends to increase. Conversely, when interest rates increase, the market value
of fixed-income securities tends to decline. Volatility of a security's market
value will differ depending upon the security's duration, the issuer and the
type of instrument.
 
                                     A-12
<PAGE>
 
Investments in fixed-income securities are subject to the risk that the issuer
could default on its obligations and an Underlying Fund could sustain losses
on such investments. A default could impact both interest and principal
payments.
 
  The Underlying Funds may invest in various types of derivative debt
securities that present more complex types of interest rate risks. These risks
include call risk and extension risk. Call risk (i.e., where the issuer
exercises its right to pay principal on an obligation earlier than scheduled)
causes cash flow to be returned earlier than expected. This typically results
when interest rates have declined and an Underlying Fund will suffer from
having to reinvest in lower yielding securities. Extension risk (i.e., where
the issuer exercises its right to pay principal on an obligation later than
scheduled) causes cash flows to be returned later than expected. This
typically results when interest rates have increased, and the Underlying Fund
may be unable to recoup all of its initial investment and will also suffer
from the inability to invest in higher yielding securities.
 
  Asset-Backed Securities present certain credit risks that are not presented
by Mortgage-Backed Securities because Asset-Backed Securities generally do not
have the benefit of a security interest in collateral that is comparable to
mortgage assets. There is the possibility that, in some cases, recoveries on
repossessed collateral may not be available to support payments on these
securities.
 
RISKS OF INVESTING IN NON-INVESTMENT GRADE FIXED-INCOME SECURITIES
 
  Non-investment grade fixed-income securities are considered predominantly
speculative by traditional investment standards. In some cases, these
obligations may be highly speculative and have poor prospects for reaching
investment grade standing. Non-investment grade fixed-income securities and
unrated securities of comparable credit quality (commonly known as "junk
bonds") are subject to the increased risk of an issuer's inability to meet
principal and interest obligations. These securities, also referred to as high
yield securities, may be subject to greater price volatility due to such
factors as specific corporate developments, interest rate sensitivity,
negative perceptions of the junk bond markets generally and less secondary
market liquidity. Non-investment grade securities are generally unsecured and
are often subordinated to the rights of other creditors of the issuers of such
securities. Investment by the Underlying Fund in defaulted securities poses
additional risk of loss should nonpayment of principal and interest continue
in respect of such securities. Even if such securities are held to maturity,
recovery by the Underlying Fund of its initial investment and any anticipated
income or appreciation is uncertain.
 
RISKS OF OTHER DERIVATIVE TRANSACTIONS
 
  An Underlying Fund's transactions, if any, in options, futures, options on
futures, swaps, structured securities and currency forward contracts involve
certain risks, including a possible lack of correlation between changes in the
value of hedging instruments and the portfolio assets (if any) being hedged,
the potential illiquidity of the markets for derivative instruments, the risks
arising from margin requirements and related leverage factors associated with
such transactions. The use of these management techniques to seek to increase
total return may be regarded as a speculative practice and involves the risk
of loss if the investment adviser is incorrect in its expectation of
fluctuations in securities prices, interest rates or currency prices.
 
NON-DIVERSIFICATION
 
  The Global Income Fund is registered as a "non-diversified" Fund under the
1940 Act and is, therefore, more susceptible to adverse developments affecting
any single issuer. In addition, the Global Income Fund, and certain other
Underlying Funds, may invest more than 25% of their total assets in the
securities of corporate and governmental issuers located in a single foreign
country. Concentration of a Fund's investments in such issuers will subject
the Fund, to a greater extent than if investment was more limited, to the
risks of adverse securities markets, exchange rates and social, political or
economic events which may occur in those countries.
 
                                     A-13
<PAGE>
 
 
                                  APPENDIX B
 
                            STATEMENT OF INTENTION
    (APPLICABLE ONLY TO CLASS A SHARES PURCHASED SUBJECT TO A SALES CHARGE)
 
  If a shareholder anticipates purchasing $50,000 or more of Class A Shares of
a Portfolio alone or in combination with Class A Shares of another Portfolio
or another Goldman Sachs Fund within a 13-month period, the shareholder may
obtain Shares of the Portfolio at the same reduced sales charge as though the
total quantity were invested in one lump sum by filing this Statement of
Intention incorporated by reference in the Account Application. Income
dividends and capital gain distributions taken in additional Shares will not
apply toward the completion of this Statement of Intention.
 
  To ensure that the reduced price will be received on future purchases, the
investor must inform Goldman Sachs that this Statement of Intention is in
effect each time shares are purchased. Subject to the conditions mentioned
below, each purchase will be made at the public offering price applicable to a
single transaction of the dollar amount specified on the Account Application.
The investor makes no commitment to purchase additional Shares, but if the
investor's purchases within 13 months plus the value of Shares credited toward
completion do not total the sum specified, the investor will pay the increased
amount of the sales charge prescribed in the Escrow Agreement.
 
                               ESCROW AGREEMENT
 
  Out of the initial purchase (or subsequent purchases if necessary) 5% of the
dollar amount specified on the Account Application shall be held in escrow by
the Transfer Agent in the form of shares registered in the investor's name.
All income dividends and capital gains distributions on escrowed shares will
be paid to the investor or to his order. When the minimum investment so
specified is completed (either prior to or by the end of the 13th month), the
investor will be notified and the escrowed Shares will be released. In signing
the Account Application, the investor irrevocably constitutes and appoints the
Transfer Agent his or her attorney to surrender for redemption any or all
escrowed Shares with full power of substitution in the premises.
 
  If the intended investment is not completed, the investor will be asked to
remit to Goldman Sachs any difference between the sales charge on the amount
specified and on the amount actually attained. If the investor does not within
20 days after written request by Goldman Sachs pay such difference in the
sales charge, the Transfer Agent will redeem an appropriate number of the
escrowed Shares in order to realize such difference. Shares remaining after
any such redemption will be released by the Transfer Agent.
 
                                      B-1
<PAGE>
 
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS ASSET
MANAGEMENT
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR
85 BROAD STREET
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
TRANSFER AGENT
4900 SEARS TOWER
CHICAGO, ILLINOIS 60606
 
STATE STREET BANK AND TRUST COMPANY
CUSTODIAN
1776 HERITAGE DRIVE
NORTH QUINCY, MASSACHUSETTS 02171
 
ARTHUR ANDERSEN LLP
INDEPENDENT PUBLIC ACCOUNTANTS
225 FRANKLIN STREET
BOSTON, MASSACHUSETTS 02110
 
TOLL FREE (IN U.S.) . . . . . . . . 800-621-2550
 
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS
 
ASSET ALLOCATION PORTFOLIOS
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
 
CLASS A, B AND C SHARES
 
 
 
LOGO GOLDMAN
     SACHS
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
AAPRO
501423
<PAGE>
 
- --------------------------------------------------------------------------------
 
PROSPECTUS                       GOLDMAN SACHS
January 1, 1998, as revised
                          ASSET ALLOCATION PORTFOLIOS
September 1, 1998                SERVICE SHARES
 
  The Goldman Sachs Asset Allocation Portfolios (the "Portfolios") are
professionally-managed portfolios designed to take advantage of the benefits of
asset allocation. Each Portfolio has a separate objective, which it seeks to
achieve by investing in a number of other Goldman Sachs mutual funds (the
"Underlying Funds").
 
GOLDMAN SACHS INCOME STRATEGY PORTFOLIO
  Seeks a high level of current income with greater stability of principal
  than an investment in equity securities alone.
 
GOLDMAN SACHS GROWTH AND INCOME STRATEGY PORTFOLIO
  Seeks long-term capital appreciation and current income.
 
GOLDMAN SACHS GROWTH STRATEGY PORTFOLIO
  Seeks capital appreciation and secondarily current income.
 
GOLDMAN SACHS AGGRESSIVE GROWTH STRATEGY PORTFOLIO
  Seeks capital appreciation.
 
  Goldman Sachs Asset Management ("GSAM"), New York, New York, a separate
operating division of Goldman, Sachs & Co. ("Goldman Sachs"), serves as
investment adviser to each Portfolio. GSAM and its affiliates also provide
advisory services to the Underlying Funds. GSAM is also referred to in this
Prospectus as the "Investment Adviser." Goldman Sachs serves as the Portfolios'
distributor and transfer agent.
 
SERVICE SHARES OF THE PORTFOLIOS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR
GUARANTEED OR ENDORSED BY, ANY BANK OR OTHER INSURED DEPOSITORY INSTITUTION AND
ARE NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL
RESERVE BOARD OR ANY OTHER GOVERNMENT AGENCY. AN INVESTMENT IN A PORTFOLIO
INVOLVES INVESTMENT RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
 
  This Prospectus provides information about Goldman Sachs Trust (the "Trust")
and the Portfolios that a prospective investor should understand before
investing. This Prospectus should be retained for future reference. A Statement
of Additional Information (the "Additional Statement"), dated January 1, 1998,
as revised September 1, 1998, containing further information about the Trust
and the Portfolios which may be of interest to investors, has been filed with
the Securities and Exchange Commission ("SEC"), is incorporated herein by
reference in its entirety, and may be obtained without charge from Service
Organizations (as defined herein) or Goldman Sachs by calling the telephone
number, or writing to one of the addresses, listed on the back cover of this
Prospectus. The SEC maintains a Web site (http://www.sec.gov) that contains the
Additional Statement and other information regarding the Trust.
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
Portfolio Highlights................   2
Fees and Expenses...................   6
Investment Objectives and Policies..   8
Risk Factors and Special
 Considerations.....................  10
Description of Underlying Funds.....  11
Management..........................  18
Expenses............................  21
Net Asset Value.....................  23
Performance Information.............  23
Shares of the Trust.................  24
</TABLE>
<TABLE>
<CAPTION>
                                                                PAGE
                                                                ----
                         <S>                                    <C>
                         Taxation..............................  24
                         Additional Information................  25
                         Additional Services...................  26
                         Reports to Shareholders...............  26
                         Dividends.............................  27
                         Purchase of Service Shares............  27
                         Exchange Privilege....................  29
                         Redemption of Service Shares..........  29
                         Appendix A............................ A-1
                         Appendix B............................ B-1
</TABLE>
<PAGE>
 
 
                              PORTFOLIO HIGHLIGHTS
 
 
   The following is intended to highlight certain information and is
 qualified in its entirety by the more detailed information contained in
 this Prospectus.
 
  WHAT IS THE GOLDMAN SACHS TRUST?
 
   The Goldman Sachs Trust is an open-end management investment company
 that offers its shares ("Shares") in several investment portfolios
 (commonly known as mutual funds). Each Portfolio pools the monies of
 investors by selling its Shares to the public and investing these monies
 in a portfolio of securities designed to achieve that Portfolio's stated
 investment objectives.
 
  WHAT ARE THE INVESTMENT OBJECTIVES AND POLICIES OF THE PORTFOLIOS?
 
   Each Portfolio has distinct investment objectives and policies. Each
 Portfolio seeks to achieve its objectives by investing in a combination
 of Underlying Funds for which Goldman Sachs now or in the future acts as
 investment adviser or principal underwriter. Some of these Funds invest
 primarily in fixed-income or money market securities (the "Underlying
 Fixed-Income Funds"); other Funds invest primarily in equity securities
 (the "Underlying Equity Funds"). Investors may choose to invest in one or
 more of the Portfolios based on their personal investment goals, risk
 tolerances and financial circumstances. For a further description of the
 Portfolios' investment objectives and policies, see "Investment
 Objectives and Policies."
 
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
   PORTFOLIO NAMES   INVESTMENT OBJECTIVES               INVESTMENT CRITERIA
  ----------------  ------------------------ -------------------------------------------
  <S>               <C>                      <C>
  GOLDMAN SACHS     High level of current    Under normal conditions, approximately 60%
  INCOME STRATEGY   income with greater      of the Portfolio's total assets will be
  PORTFOLIO         stability of principal   allocated among Underlying Fixed-Income
                    than an investment in    Funds. Allocation to Underlying Equity
                    equity securities alone. Funds is intended to add diversification
                                             and enhance returns, but will also add some
                                             volatility.
- ----------------------------------------------------------------------------------------
  GOLDMAN SACHS     Long-term capital        Under normal conditions, approximately 60%
  GROWTH AND        appreciation and current of the Portfolio's total assets will be
  INCOME STRATEGY   income.                  allocated among Underlying Equity Funds,
  PORTFOLIO                                  which are intended to provide the capital
                                             appreciation component. Allocation to
                                             Underlying Fixed-Income Funds is intended
                                             to provide the income component.
- ----------------------------------------------------------------------------------------
  GOLDMAN SACHS     Capital appreciation and Under normal conditions, approximately 80%
  GROWTH STRATEGY   secondarily current      of the Portfolio's total assets will be
  PORTFOLIO         income.                  allocated among Underlying Equity Funds,
                                             with a blend of domestic large cap, small
                                             cap and international exposure to seek
                                             capital appreciation. Allocation to
                                             Underlying Fixed-Income Funds is to provide
                                             diversification.
- ----------------------------------------------------------------------------------------
  GOLDMAN SACHS     Capital appreciation.    Under normal conditions, substantially all
  AGGRESSIVE                                 of the Portfolio's total assets will be
  GROWTH STRATEGY                            allocated among Underlying Equity Funds,
  PORTFOLIO                                  with a greater focus on small cap and
                                             international investments.
</TABLE>
 
 
 
                                       2
<PAGE>
 
 WHAT IS GOLDMAN SACHS ASSET MANAGEMENT'S GLOBAL ASSET ALLOCATION PROCESS?
 
 
  The Quantitative Research Group at GSAM uses disciplined quantitative models
to determine the relative attractiveness of the world's stock, bond and
currency markets. GSAM's models use financial and economic variables to capture
fundamental relationships that it believes make sense. While GSAM's process is
rigorous and quantitative, it also incorporates clear economic reasoning behind
each recommendation.
 
  Each Portfolio starts with a "base-line" or strategic allocation among the
various asset classes. GSAM will then tactically deviate from the strategic
allocations based on forecasts provided by the models. The tactical process
seeks to add value by overweighting attractive markets and underweighting
unattractive markets. Greater deviations from the strategic allocation of a
given Portfolio result in higher risk that the tactical allocation will
underperform the strategic allocation. However, GSAM's risk control process
balances the amount any asset class can be overweighted or underweighted in
seeking to achieve higher expected returns against the amount of risk imposed
by that deviation from the strategic allocation. GSAM employs Goldman, Sachs &
Co.'s proprietary Black-Litterman asset allocation technique in an effort to
optimally balance these two goals. This technique combines the Quantitative
Research Group's market forecasts with economic equilibrium in seeking to
construct risk-controlled portfolios.
 
 WHAT ARE THE RISK FACTORS AND SPECIAL CHARACTERISTICS THAT I SHOULD CONSIDER
 BEFORE INVESTING?
 
 
  The Portfolios are intended as an efficient and cost-effective method of
giving investors access to four different portfolio mixes. The risk/return
balance of each Portfolio is varied by the proportion of assets allocated to
the different kinds of investments. For example, the Aggressive Growth Strategy
Portfolio intends to invest substantially all of its assets in Underlying Funds
that invest in equity securities. An investor seeking capital appreciation
potential, with a longer time horizon and a tolerance for volatility, might
choose this Portfolio. Conversely, an investor seeking a balance of income and
growth, with a shorter time horizon and less tolerance for volatility, might
choose the Income Strategy Portfolio or Growth and Income Strategy Portfolio,
which invest a larger portion of their assets in Underlying Funds that invest
in fixed income securities.
 
  Because the assets of each Portfolio are invested in Underlying Funds, each
Portfolio's investment performance is directly related to the investment
performance of the Underlying Funds held by it. The ability of a Portfolio to
meet its investment objective is, therefore, also directly related to the
ability of the Underlying Funds held to meet their objectives, as well as the
allocation among those Underlying Funds by the Investment Adviser.
 
  The value of the Underlying Funds' investments, and the net asset values
("NAV") of the Shares of both the Underlying Funds and the Portfolios, will
fluctuate in response to changes in market and economic conditions, as well as
the financial condition and prospects of issuers in which the Underlying Funds
invest. An Underlying Fund's use of certain investment techniques, including
derivatives, forward contracts, options and futures, will subject the Fund to
greater risk than funds that do not employ such techniques. In addition,
investments by certain Underlying Funds in foreign issuers, currencies, real
estate investment trusts and small market capitalization companies will expose
those Funds to a higher degree of risk and price volatility. These investments
include securities of issuers located in countries in Asia, Latin America,
Eastern Europe and Africa whose economies or securities markets are considered
not to be fully developed ("Emerging Countries"). Some
 
                                       3
<PAGE>
 
Underlying Funds may also invest in non-investment grade fixed-income
securities (commonly referred to as "junk bonds"), which are considered to be
speculative by traditional investment standards.
 
  An investor in the Portfolios should realize that investments in the
Underlying Funds can be made directly. By investing in the Underlying Funds
indirectly through the Portfolios, an investor will incur not only a
proportionate share of the expenses of the Underlying Funds (including
operating costs and investment management fees), but also expenses of the
Portfolios. While the Portfolios offer a greater level of diversification than
many other types of mutual funds, a single Portfolio may not provide a complete
investment program for an investor.
 
  For a further description of the risks involved in an investment in the
Portfolios and the Underlying Funds, see "Risk Factors and Special
Considerations" and Appendix A to this Prospectus.
 
 WHO MANAGES THE PORTFOLIOS?
 
 
  Goldman Sachs Asset Management serves as Investment Adviser to the Portfolios
and, except as noted, to each Underlying Fund. Goldman Sachs Funds Management,
L.P. serves as investment adviser to the CORE U.S. Equity, Capital Growth,
Adjustable Rate Government and Short Duration Government Funds. Goldman Sachs
Asset Management International serves as investment adviser to the
International Equity, Japanese Equity, International Small Cap, Emerging
Markets Equity, Asia Growth and Global Income Funds. As of July 24, 1998, the
Investment Adviser, together with its affiliates, acted as investment adviser
or distributor for assets in excess of $168 billion.
 
 WHO DISTRIBUTES THE PORTFOLIOS' SHARES?
 
 
  Goldman Sachs acts as distributor of each Portfolio's Shares (the
"Distributor").
 
 WHAT IS THE MINIMUM INVESTMENT?
 
 
  The Portfolios do not have any minimum purchase or account requirements with
respect to Service Shares. A Service Organization may, however, impose a
minimum amount for initial and subsequent investments in Service Shares, and
may establish other requirements such as a minimum account balance.
 
 HOW DO I PURCHASE SERVICE SHARES?
 
 
  Customers of Service Organizations may invest in Service Shares only through
their Service Organizations. Service Shares of a Portfolio are purchased at the
current NAV without any sales load. See "Purchase of Service Shares."
 
  ADDITIONAL SERVICES. The Trust, on behalf of the Portfolios, has adopted a
Service Plan with respect to the Service Shares which authorizes a Portfolio to
compensate Service Organizations for providing account administration and
shareholder liaison services to their customers who are the beneficial owners
of such Shares. The Trust, on behalf of the Portfolios, will enter into
agreements with each Service Organization which will provide for compensation
to the Service Organization in an amount up to 0.50% (on an annualized basis)
of the
 
                                       4
<PAGE>
 
average daily net assets of the Service Shares of the Portfolios attributable
to or held in the name of the Service Organization for its customers. This
compensation is in addition to any other compensation, if any, a Service
Organization may receive from its customers, the Trust or Goldman Sachs. See
"Additional Services."
 
 HOW DO I SELL MY SERVICE SHARES?
 
 
  You may redeem Service Shares upon request on any Business Day, as defined
under "Additional Information," at the NAV next determined after receipt of
such request in proper form. See "Redemption of Service Shares."
 
 HOW DO I RECEIVE DIVIDENDS AND DISTRIBUTIONS?
 
 
<TABLE>
<CAPTION>
                                                                      CAPITAL
                                       INVESTMENT INCOME DIVIDENDS     GAINS
PORTFOLIO                                   DECLARED AND PAID      DISTRIBUTIONS
- ---------                              --------------------------- -------------
<S>                                    <C>                         <C>
Income Strategy.......................            Monthly            Annually
Growth and Income Strategy............          Quarterly            Annually
Growth Strategy.......................          Quarterly            Annually
Aggressive Growth Strategy............          Annually             Annually
</TABLE>
 
  Recordholders of Service Shares may receive dividends and distributions in
additional Service Shares of the Portfolio in which they have invested or may
elect to receive them in cash. For further information concerning dividends and
distributions, see "Dividends."
 
                                       5
<PAGE>
 
 
                               FEES AND EXPENSES
                                (SERVICE SHARES)
 
 
<TABLE>
<CAPTION>
                                                GROWTH AND           AGGRESSIVE
                                       INCOME     INCOME    GROWTH     GROWTH
                                      STRATEGY   STRATEGY  STRATEGY   STRATEGY
                                      PORTFOLIO PORTFOLIO  PORTFOLIO PORTFOLIO
                                      --------- ---------- --------- ----------
<S>                                   <C>       <C>        <C>       <C>
SHAREHOLDER TRANSACTION EXPENSES:
 Maximum Sales Charge Imposed on Pur-
  chases.............................   None       None      None       None
 Maximum Sales Charge Imposed on Re-
  invested Dividends.................   None       None      None       None
 Redemption Fees.....................   None       None      None       None
 Exchange Fees.......................   None       None      None       None
ANNUAL FUND OPERATING EXPENSES:
 (as a percentage of average daily
  net assets)/1/
 Management Fees (for asset
  allocation) (after applicable
  limitations)/2/....................   0.15%      0.15%     0.15%      0.15%
 Service Fees/3/.....................   0.50%      0.50%     0.50%      0.50%
Other Expenses:
 Other Expenses (after applicable
  limitations)/4/....................   0.04%      0.04%     0.04%      0.04%
Underlying Fund Expenses/1/..........   0.69%      0.79%     0.84%      0.90%
                                        ----       ----      ----       ----
TOTAL FUND OPERATING EXPENSES (after
 fee and expense limitations)/5/.....   1.38%      1.48%     1.53%      1.59%
                                        ====       ====      ====       ====
</TABLE>
- --------
/1/The Portfolios' operating expenses have been restated to reflect the fees
   and expenses in effect as of September 1, 1998. Underlying Fund expenses for
   each Portfolio are based upon the strategic allocation of each Portfolio's
   investment in the Underlying Funds and upon the total operating expenses of
   the Underlying Funds as in effect on September 1, 1998. Actual Underlying
   Fund expenses incurred by each Portfolio may vary with changes in the
   allocation of each Portfolio's assets among the Underlying Funds and with
   other events that directly affect the expenses of the Underlying Funds. For
   additional information on the total operating expenses of each Underlying
   Fund, please refer to "Expenses."
/2/The Investment Adviser has voluntarily agreed that a portion of the
   management fees would not be imposed on the Portfolios equal to 0.20%.
   Without such limitation, management fees would be 0.35% of each Portfolio's
   average daily net assets.
/3/Service Organizations may charge other fees to their customers who are
   beneficial owners of Service Shares in connection with their customer
   accounts.
/4/The Investment Adviser has voluntarily agreed to reduce or limit certain
   other expenses (excluding management and service fees, transfer agency fees
   (equal to 0.04% of the average daily net assets of each Portfolio's Service
   Shares), taxes, interest, brokerage fees, and litigation, indemnification
   and other extraordinary expenses) for each Portfolio to the extent such
   expenses exceed 0.00% of the Portfolio's average daily net assets.
/5/Without the limitations described above, "Other Expenses" and "Total
   Operating Expenses" of the Service Shares of the Portfolios would be as set
   forth below:
 
<TABLE>
<CAPTION>
                                              GROWTH AND                      AGGRESSIVE
                            INCOME STRATEGY INCOME STRATEGY GROWTH STRATEGY GROWTH STRATEGY
                               PORTFOLIO       PORTFOLIO       PORTFOLIO       PORTFOLIO
                            --------------- --------------- --------------- ---------------
   <S>                      <C>             <C>             <C>             <C>
   Other Expenses..........      0.40%           0.17%           0.20%           0.33%
   Total Operating Ex-
    penses.................      1.94%           1.81%           1.89%           2.08%
</TABLE>
 
                                       6
<PAGE>
 
  The Portfolios will invest only in Institutional Shares of the Underlying
Funds and, accordingly, will not pay any sales load or distribution and
service fees in connection with their investments in Shares of the Underlying
Funds. The Portfolios will, however, indirectly bear their pro rata share of
the fees and expenses incurred by the Underlying Funds that are applicable to
Institutional Shareholders. The following example assumes the payment by each
Portfolio of operating expenses at the levels set forth in the table above and
of its pro rata share of the Institutional Share expenses of the Underlying
Funds (also as set forth above) in which a Portfolio is invested.
 
EXAMPLE
 
  You would pay the following expenses on a hypothetical $1,000 investment,
assuming (1) a 5% annual return; and (2) redemption at the end of each time
period:
 
<TABLE>
<CAPTION>
                                                                  1 YEAR 3 YEARS
                                                                  ------ -------
<S>                                                               <C>    <C>
Income Strategy Portfolio........................................  $14     $44
Growth and Income Strategy Portfolio.............................  $15     $47
Growth Strategy Portfolio........................................  $16     $48
Aggressive Growth Strategy Portfolio.............................  $16     $50
</TABLE>
 
  The Investment Adviser and Goldman Sachs may modify or discontinue any of
the limitations set forth above in the future at their discretion. The
information set forth in the foregoing table and hypothetical example relates
only to Service Shares of the Portfolios. Each Portfolio also offers Class A,
B, C and Institutional Shares, which are subject to different fees and
expenses (which affect performance), have different minimum investment
requirements and are entitled to different services. Information regarding
Class A, B, C and Institutional Shares of the Portfolios may be obtained from
an investor's sales representative or from Goldman Sachs by calling the number
on the back of this Prospectus.
 
  In addition to the compensation itemized above, certain Service
Organizations may also receive other compensation in connection with the sale
and distribution of Service Shares or for services to their customers'
accounts and/or the Portfolios. For additional information regarding such
compensation, see "Purchase of Service Shares" in this Prospectus and the
Additional Statement.
 
  The purpose of the foregoing tables is to assist investors in understanding
the various fees and expenses of a Portfolio that an investor will bear
directly or indirectly. As stated, the information on the fees and expenses
included in the tables and hypothetical example above is based on each
Portfolio's fees and estimated expenses and allocation among the Underlying
Funds, and should not be considered as representative of past or future
expenses. Actual fees and expenses may be more or less than those indicated.
Moreover, while the example assumes a 5% annual return, a Portfolio's actual
performance will vary and may result in an actual return more or less than 5%.
See "Management--Investment Adviser" and "Additional Services."
 
                                       7
<PAGE>
 
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
 
  The four Portfolios described in this Prospectus are intended for investors
who prefer to have their asset allocation decisions made by professional money
managers. Each Portfolio seeks to achieve its investment objective by
investing within specified equity and fixed-income ranges among Underlying
Funds having different combinations of investments and different degrees of
potential investment risk and reward. An investor should choose a Portfolio
based on personal objectives, investment time horizon, tolerance for risk and
personal financial circumstances.
 
  The Income Strategy Portfolio's investment objective is to seek a high level
of current income with greater stability of principal than an investment in
equity securities alone. The Growth and Income Strategy Portfolio's investment
objective is to seek long-term capital appreciation and current income. The
Growth Strategy Portfolio's investment objective is to seek capital
appreciation and secondarily current income. The Aggressive Growth Strategy
Portfolio's investment objective is to seek capital appreciation. There can be
no assurance that any Portfolio's investment objective will be achieved.
 
  In managing the Portfolios, the Investment Adviser will seek to maintain
different allocations among the Underlying Equity Funds and the Underlying
Fixed-Income Funds depending on a Portfolio's investment objective. The tables
below illustrate the initial Underlying Equity/Fixed-Income Fund allocation
targets and ranges for each Portfolio:
 
     EQUITY/FIXED-INCOME RANGE (PERCENTAGE OF EACH PORTFOLIO'S NET ASSETS)
 
<TABLE>
<CAPTION>
    NAME OF PORTFOLIO                                            TARGET  RANGE
    -----------------                                            ------ --------
<S>                                                              <C>    <C>
Income Strategy Portfolio
  Equity........................................................   40%   20%-60%
  Fixed-Income..................................................   60%   40%-80%
Growth and Income Strategy Portfolio
  Equity........................................................   60%   40%-80%
  Fixed-Income..................................................   40%   20%-60%
Growth Strategy Portfolio
  Equity........................................................   80%  60%-100%
  Fixed-Income..................................................   20%    0%-40%
Aggressive Growth Strategy Portfolio
  Equity........................................................  100%  75%-100%
  Fixed-Income..................................................    0%    0%-25%
</TABLE>
 
  The Investment Adviser will invest in particular Underlying Funds based on
various criteria. Among other things, the Investment Adviser will analyze the
Underlying Funds' respective investment objectives, policies and investment
strategies in order to determine which Underlying Funds, in combination with
other Underlying Funds, are appropriate in light of a Portfolio's investment
objectives.
 
  Each Portfolio is authorized to invest in any or all of the Underlying
Funds. However, it is expected that a Portfolio will normally be invested in
only some of the Underlying Funds at any particular time. A Portfolio's
investment in any of the Underlying Funds may and, in some cases is expected
to, exceed 25% of its total assets.
 
                                       8
<PAGE>
 
For example, the Growth Strategy and Aggressive Growth Strategy Portfolios are
each expected to invest initially more than 25% of their assets in the Growth
& Income Fund described below. Similarly, it is expected that the Aggressive
Growth Strategy and Income Strategy Portfolios will invest more than 25% of
their assets in the CORE International and Short Duration Government Funds,
respectively. The Investment Adviser also expects that each Portfolio (in
addition to those listed above) will initially invest a relatively significant
percentage of its equity allocation in the Growth & Income, CORE Large Cap
Growth and CORE International Equity Funds; that the Growth and Income
Strategy Portfolio will invest a relatively significant percentage of its
assets in the Core Fixed Income and Global Income Funds; and that the Income
Strategy Portfolio will invest a relatively significant percentage of its
assets in the Global Income Fund. THE PARTICULAR UNDERLYING FUNDS IN WHICH
EACH PORTFOLIO MAY INVEST, THE EQUITY/FIXED-INCOME FUND TARGETS AND RANGES AND
THE INVESTMENTS IN EACH UNDERLYING FUND MAY BE CHANGED FROM TIME TO TIME
WITHOUT SEEKING THE APPROVAL OF THE PORTFOLIO'S SHAREHOLDERS.
 
  Changes in the NAVs of the Underlying Funds will affect a Portfolio's NAV.
Because each Portfolio invests primarily in other mutual funds, which
fluctuate in value, the Portfolios' Shares will correspondingly fluctuate in
value. Although the Portfolios normally seek to remain substantially invested
in the Underlying Funds, a Portfolio may invest a portion of its assets in
high quality, short-term debt obligations to maintain liquidity in order to
meet shareholder redemptions and other short-term cash needs. These
obligations may include commercial paper, certificates of deposit, bankers'
acceptances, repurchase agreements, debt obligations backed by the full faith
and credit of the U.S. Government and demand and time deposits of domestic and
foreign banks and savings and loan associations. There may be times when, in
the opinion of the Investment Adviser, abnormal market or economic conditions
warrant that, for temporary defensive purposes, a Portfolio invest without
limitation in short-term obligations. A Portfolio may also borrow money for
temporary or emergency purposes.
 
  Each Portfolio's turnover rate is expected not to exceed 50% annually. A
Portfolio may purchase or sell securities to: (a) accommodate purchases and
sales of its Shares; (b) change the percentages of its assets invested in each
of the Underlying Funds in response to economic or market conditions; and (c)
maintain or modify the allocation of its assets among the Underlying Funds
within the percentage ranges described above.
 
  Each Portfolio is subject to certain investment restrictions that are
described in detail under "Investment Restrictions" in the Additional
Statement. Fundamental investment restrictions of a Portfolio cannot be
changed without approval of a majority of the outstanding Shares of that
Portfolio. Each Portfolio's investment objectives and all policies not
specifically designated as fundamental are non-fundamental and may be changed
without shareholder approval. If there is a change in a Portfolio's investment
objective, shareholders should consider whether that Portfolio remains an
appropriate investment in light of their then current financial positions and
needs.
 
  For information about the investment objectives of the Underlying Funds and
their investment securities, techniques and risks, see "Description of the
Underlying Funds" and Appendix A in this Prospectus, the Additional Statement
and the prospectus for each of the Underlying Funds.
 
                                       9
<PAGE>
 
 
                    RISK FACTORS AND SPECIAL CONSIDERATIONS
 
 
INVESTING IN UNDERLYING FUNDS
 
  The investments of each Portfolio are concentrated in the Underlying Funds,
and each Portfolio's investment performance is directly related to the
investment performance of the Underlying Funds held by it. The ability of each
Portfolio to meet its investment objectives is directly related to the ability
of the Underlying Funds to meet their objectives as well as the allocation
among those Underlying Funds by the Investment Adviser. The share prices and
yields of both the Portfolios and the Underlying Funds will fluctuate in
response to various market and economic factors related to the equity and
fixed-income markets. There can be no assurance that the investment objectives
of any Portfolio or any Underlying Fund will be achieved.
 
INVESTMENTS OF THE UNDERLYING FUNDS
 
  Because each Portfolio invests in the Underlying Funds, shareholders of each
Portfolio will be affected by the investment policies of the Underlying Funds
in direct proportion to the amount of assets each Portfolio allocates to those
Funds. Each Portfolio may invest in Underlying Funds that in turn invest in
small capitalization companies and foreign issuers and thus are subject to
additional risks, including changes in foreign currency exchange rates and
political risk. Foreign investments may include securities of issuers located
in Emerging Countries in Asia, Latin America, Eastern Europe and Africa. Each
Portfolio may also invest in Underlying Funds that in turn invest in non-
investment grade fixed-income securities ("junk bonds"), which are considered
speculative by traditional standards. In addition, the Underlying Funds may
purchase derivative securities; enter into forward currency transactions; lend
their portfolio securities; enter into futures contracts and options
transactions; purchase zero coupon bonds and payment-in-kind bonds; purchase
securities issued by real estate investment trusts and other issuers in the
real estate industry; purchase restricted and illiquid securities; enter into
forward roll transactions; purchase securities on a when-issued or delayed
delivery basis; enter into repurchase agreements; borrow money; and engage in
various other investment practices. The risks presented by these investment
practices are discussed in Appendix A to this Prospectus, the Additional
Statement and the prospectus for each of the Underlying Funds.
 
AFFILIATED PERSONS
 
  In managing the Portfolios, the Investment Adviser will have the authority
to select and substitute Underlying Funds. The Investment Adviser is subject
to conflicts of interest in allocating Portfolio assets among the various
Underlying Funds both because the fees payable to it and/or its affiliates by
some Underlying Funds are higher than the fees payable by other Underlying
Funds and because the Investment Adviser and its affiliates are also
responsible for managing the Underlying Funds. The Trustees and officers of
the Trust may also have conflicting interests in fulfilling their fiduciary
duties to both the Portfolios and the Underlying Funds.
 
EXPENSES
 
  An investor in a Portfolio should realize that investments in the Underlying
Funds can be made directly. By investing in the Underlying Funds indirectly
through a Portfolio, an investor will incur not only a proportionate share of
the expenses of the Underlying Funds held by the Portfolio (including
operating costs and investment management fees), but also expenses of the
Portfolio.
 
                                      10
<PAGE>
 
 
                        DESCRIPTION OF UNDERLYING FUNDS
 
 
  The following is a concise description of the investment objectives and
practices for each of the Underlying Funds that are available for investment
by the Portfolios as of the date of the Prospectus. A Portfolio may also
invest in other Underlying Funds that may become available for investment in
the future at the discretion of the Investment Adviser without shareholder
approval. There can be no assurance that the investment objectives of the
Underlying Funds will be met. Additional information regarding the investment
practices of the Underlying Funds is located in Appendix A to this Prospectus,
in the Additional Statement and in the prospectus of each of the Underlying
Funds. No offer is made in this Prospectus of any of the Underlying Funds.
 
<TABLE>
<CAPTION>
     FUND NAMES      INVESTMENT OBJECTIVES           INVESTMENT CRITERIA
  ----------------  ------------------------ ----------------------------------
  <C>               <C>                      <S>
  GROWTH AND IN-    Long-term growth of      At least 65% of total assets in
  COME FUND         capital and growth of    equity securities that are
                    income.                  considered to have favorable
                                             prospects for capital appreciation
                                             and/or dividend paying ability.
- -------------------------------------------------------------------------------
  CORE U.S. EQUITY  Long-term growth of      At least 90% of total assets in
  FUND              capital and dividend     equity securities of U.S. issuers,
                    income.                  including certain foreign issuers
                                             traded in the U.S. The Fund seeks
                                             to achieve its objective through a
                                             broadly diversified portfolio of
                                             large cap and blue chip equity
                                             securities representing all major
                                             sectors of the U.S. economy. The
                                             Fund's investments are selected
                                             using both a variety of
                                             quantitative techniques and
                                             fundamental research in seeking to
                                             maximize the Fund's expected
                                             return, while maintaining risk,
                                             style, capitalization and industry
                                             characteristics similar to the S&P
                                             500 Index.
- -------------------------------------------------------------------------------
  CORE LARGE CAP    Long-term growth of      At least 90% of total assets in
  GROWTH FUND       capital. Dividend income equity securities of U.S issuers,
                    is a secondary           including certain foreign issuers
                    consideration.           traded in the U.S. The Fund seeks
                                             to achieve its objective through a
                                             broadly diversified portfolio of
                                             equity securities of large cap
                                             U.S. issuers that are expected to
                                             have better prospects for earnings
                                             growth than the growth rate of the
                                             general domestic economy. The
                                             Fund's investments are selected
                                             using both a variety of
                                             quantitative techniques and
                                             fundamental research in seeking to
                                             maximize the Fund's expected
                                             return, while maintaining risk,
                                             style, capitalization and industry
                                             characteristics similar to the
                                             Russell 1000 Growth Index.
- -------------------------------------------------------------------------------
  CORE SMALL CAP    Long-term growth of      At least 90% of total assets in
  EQUITY FUND       capital.                 equity securities of U.S. issuers,
                                             including certain foreign issuers
                                             traded in the U.S. The Fund seeks
                                             to achieve its investment
                                             objective through a broadly
                                             diversified portfolio of equity
                                             securities of U.S. issuers which
                                             are included in the Russell 2000
                                             Index at the time of investment.
                                             The Fund's investments are
                                             selected using both a variety of
                                             quantitative techniques and
                                             fundamental research in seeking to
                                             maximize the Fund's expected
                                             return, while maintaining risk,
                                             style, capitalization and industry
                                             characteristics similar to the
                                             Russell 2000 Index.
</TABLE>
 
                                                                    (continued)
 
                                      11
<PAGE>
 
<TABLE>
<CAPTION>
     FUND NAMES      INVESTMENT OBJECTIVES           INVESTMENT CRITERIA
  ----------------  ------------------------ ----------------------------------
  <C>               <C>                      <S>
  CORE INTERNA-     Long-term growth of      At least 90% of total assets in
  TIONAL EQUITY     capital.                 equity securities of companies
  FUND                                       organized outside the United
                                             States or whose securities are
                                             principally traded outside the
                                             United States. The Fund seeks
                                             broad representation of large cap
                                             issuers across major countries and
                                             sectors of the international
                                             economy. The Fund's investments
                                             are selected using both a variety
                                             of quantitative techniques and
                                             fundamental research in seeking to
                                             maximize the Fund's expected
                                             return, while maintaining risk,
                                             style, capitalization and industry
                                             characteristics similar to the
                                             unhedged Morgan Stanley Capital
                                             International (MSCI) Europe,
                                             Australasia and Far East Index
                                             (the "EAFE Index"). The Fund may
                                             employ certain currency management
                                             techniques.
- -------------------------------------------------------------------------------
  CAPITAL GROWTH    Long-term capital        At least 90% of total assets in a
  FUND              growth.                  diversified portfolio of equity
                                             securities. Long-term capital
                                             appreciation potential is
                                             considered in selecting
                                             investments.
- -------------------------------------------------------------------------------
  MID CAP EQUITY    Long-term capital        At least 65% of total assets in
  FUND              appreciation.            equity securities of companies
                                             with public stock market
                                             capitalizations within the range
                                             of the market capitalization of
                                             companies constituting the Russell
                                             Midcap Index at the time of the
                                             investment (currently between $400
                                             million and $16 billion).
- -------------------------------------------------------------------------------
  INTERNATIONAL     Long-term capital        Substantially all, and at least
  EQUITY FUND       appreciation.            65%, of total assets in equity
                                             securities of companies organized
                                             outside the United States or whose
                                             securities are principally traded
                                             outside the United States. The
                                             Fund may employ certain currency
                                             management techniques.
- -------------------------------------------------------------------------------
  SMALL CAP VALUE   Long-term capital        At least 65% of total assets in
  FUND              growth.                  equity securities of companies
                                             with public stock market
                                             capitalizations of $1 billion or
                                             less at the time of investment.
- -------------------------------------------------------------------------------
  EMERGING MARKETS  Long-term capital        Substantially all, and at least
  EQUITY FUND       appreciation.            65%, of total assets in equity
                                             securities of emerging country
                                             issuers. The Fund may employ
                                             certain currency management
                                             techniques.
- -------------------------------------------------------------------------------
  ASIA GROWTH FUND  Long-term capital        Substantially all, and at least
                    appreciation.            65%, of total assets in equity
                                             securities of companies in China,
                                             Hong Kong, India, Indonesia,
                                             Malaysia, Pakistan, the
                                             Philippines, Singapore, South
                                             Korea, Sri Lanka, Taiwan and
                                             Thailand. The Fund may employ
                                             certain currency management
                                             techniques.
- -------------------------------------------------------------------------------
  REAL ESTATE SE-   Total return comprised   Substantially all, and at least
  CURITIES FUND     of long-term growth of   80%, of total assets in a
                    capital and dividend     diversified portfolio of equity
                    income.                  securities of issuers that are
                                             primarily engaged in or related to
                                             the real estate industry. The Fund
                                             expects that a substantial portion
                                             of its total assets will be
                                             invested in real estate investment
                                             trusts ("REITS").
- -------------------------------------------------------------------------------
  JAPANESE EQUITY   Long-term capital        Substantially all, and at least
  FUND              appreciation.            65%, of total assets in equity
                                             securities of Japanese companies.
                                             The Fund may employ certain
                                             currency management techniques.
- -------------------------------------------------------------------------------
  INTERNATIONAL     Long-term capital        Substantially all, and at least
  SMALL CAP FUND    appreciation.            65%, of total assets in equity
                                             securities of companies with
                                             public stock market
                                             capitalizations of $1 billion or
                                             less at the time of investment
                                             that are organized outside the
                                             United States or whose securities
                                             are principally traded outside the
                                             United States. The Fund may employ
                                             certain currency management
                                             techniques.
</TABLE>
 
                                       12
<PAGE>
 
<TABLE>
<CAPTION>
                                                             APPROXIMATE
                                                              INTEREST
                          INVESTMENT       DURATION OR          RATE                          CREDIT         OTHER
      FUND NAMES          OBJECTIVES        MATURITY         SENSITIVITY INVESTMENT SECTOR   QUALITY      INVESTMENTS
- ----------------------  -------------- -------------------   ----------- ----------------- ------------ ---------------
<S>                     <C>            <C>                   <C>         <C>               <C>          <C>
FINANCIAL SQUARE PRIME  Maximize         Maximum Maturity of 3-month     Money market      High Quality N/A
OBLIGATIONS FUND        current income   Individual          bill        instruments       (short-term
                        to the extent    Investments =                   including U.S.    ratings of
                        consistent       13 months at time               Government        A-1, P-1 or
                        with the         of purchase                     Securities, U.S.  comparable
                        maintenance of   Maximum Dollar-                 bank obligations, quality).
                        liquidity.       Weighted Average                commercial paper
                                         Portfolio                       and other short-
                                         Maturity =                      term obligations
                                         90 days                         of U.S.
                                                                         corporations,
                                                                         governmental and
                                                                         other entities,
                                                                         and related
                                                                         repurchase
                                                                         agreements.
- -----------------------------------------------------------------------------------------------------------------------
ADJUSTABLE RATE         A high level     Target Duration =   9-month     At least 65% of   U.S.         Fixed-rate
GOVERNMENT FUND         of current       6-month to 1-year   note        total assets in   Government   mortgage pass-
                        income,          U.S. Treasury                   securities issued Securities   through
                        consistent       Security                        or guaranteed by               securities and
                        with low         Maximum Duration*=              the U.S.                       repurchase
                        volatility of    2 years                         government, its                agreements
                        principal.                                       agencies,                      collateralized
                                                                         instrumentalities              by U.S.
                                                                         or sponsored                   Government
                                                                         enterprises                    Securities.
                                                                         ("U.S. Government
                                                                         Securities") that
                                                                         are adjustable
                                                                         rate mortgage
                                                                         pass-through
                                                                         securities and
                                                                         other mortgage
                                                                         securities with
                                                                         periodic interest
                                                                         rate resets.
- -----------------------------------------------------------------------------------------------------------------------
SHORT DURATION          A high level     Target Duration =   2-year      At least 65% of   U.S.         Mortgage pass-
GOVERNMENT FUND         of current       2-year U.S.         bond        total assets in   Government   through
                        income and       Treasury Security               U.S. Government   Securities   securities and
                        secondarily,     plus or minus .5                Securities and                 other
                        in seeking       years Maximum                   repurchase                     securities
                        current          Duration*= 3 years              agreements                     representing an
                        income, may                                      collateralized by              interest in or
                        also consider                                    such securities.               collateralized
                        the potential                                                                   by mortgage
                        for capital                                                                     loans.
                        appreciation.
- -----------------------------------------------------------------------------------------------------------------------
GOVERNMENT INCOME FUND  A high level     Target Duration =   5-year      At least 65% of   U.S.         Non-government
                        of current       Lehman Brothers     bond        assets in U.S.    Government   mortgage pass-
                        income,          Mutual Fund                     Government        Securities   through
                        consistent       Government/Mortgage             Securities,       and non-U.S. securities,
                        with safety of   Index plus or minus             including         Government   asset-backed
                        principal.       1 year                          mortgage-backed   Securities = securities and
                                         Maximum                         U.S. Government   AAA/Aaa      corporate
                                         Duration*= 6 years              Securities and                 fixed-income
                                                                         repurchase                     securities.
                                                                         agreements
                                                                         collateralized by
                                                                         such securities.
</TABLE>
 
                                       13
<PAGE>
 
<TABLE>
<CAPTION>
                                                      APPROXIMATE
                                                       INTEREST
                          INVESTMENT    DURATION OR      RATE                          CREDIT           OTHER
      FUND NAMES          OBJECTIVES      MATURITY    SENSITIVITY INVESTMENT SECTOR    QUALITY       INVESTMENTS
- ----------------------  -------------- -------------- ----------- ----------------  -------------  ---------------
<S>                     <C>            <C>            <C>         <C>               <C>            <C>
CORE FIXED INCOME FUND  Total return   Target         5-year      At least 65% of   Minimum =      Foreign fixed-
                        consisting of  Duration =     bond        assets in fixed-  BBB/Baa        income,
                        capital        Lehman                     income            Minimum for    municipal and
                        appreciation   Brothers                   securities,       non-dollar     convertible
                        and income     Aggregate Bond             including U.S.    securities =   securities,
                        that exceeds   Index plus or              Government        AA/Aa          foreign
                        the total      minus                      Securities,                      currencies and
                        return of the  1 year                     corporate,                       repurchase
                        Lehman         Maximum                    mortgage-backed                  agreements
                        Brothers       Duration*=  6              and asset-backed                 collateralized
                        Aggregate Bond years                      securities.                      by U.S.
                        Index.                                                                     Government
                                                                                                   Securities.
- ------------------------------------------------------------------------------------------------------------------
GLOBAL INCOME FUND      A high total   Target         6-year      Securities of     Minimum =      Mortgage and
                        return,        Duration =     bond        U.S. and foreign  BBB/Baa        asset-backed
                        emphasizing    J.P. Morgan                governments and   At least       securities,
                        current        Global                     corporations.     50% = AAA/Aaa  foreign
                        income, and,   Government                                                  currencies and
                        to a lesser    Bond Index                                                  repurchase
                        extent,        (hedged) plus                                               agreements
                        providing      or minus 2.5                                                collateralized
                        opportunities  years Maximum                                               by U.S.
                        for capital    Duration*= 7.5                                              Government
                        appreciation.  years                                                       Securities or
                                                                                                   certain foreign
                                                                                                   government
                                                                                                   securities.
- ------------------------------------------------------------------------------------------------------------------
HIGH YIELD FUND         A high level   Target         6-year      Except for        At least       Mortgage-backed
                        of current     Duration =     bond        temporary         65% = BB/Ba    and asset-
                        income and     Lehman                     defensive         or below       backed
                        capital        Brothers High              purposes, at                     securities,
                        appreciation.  Yield Bond                 least 65% of                     U.S. Government
                                       Index plus or              assets in fixed-                 Securities,
                                       minus 2.5                  income                           investment
                                       years                      securities rated                 grade corporate
                                       Maximum                    below investment                 fixed-income
                                       Duration*= 7.5             grade, including                 securities,
                                       years                      U.S. and non-                    structured
                                                                  U.S. dollar                      securities,
                                                                  corporate debt,                  foreign
                                                                  foreign                          currencies and
                                                                  government                       repurchase
                                                                  securities,                      agreements
                                                                  convertible                      collateralized
                                                                  securities and                   by U.S.
                                                                  preferred stock.                 Government
                                                                                                   Securities.
</TABLE>
- -----
* Under normal interest rate conditions.
 
                                       14
<PAGE>
 
  In pursuing their investment objectives and programs, each of the Underlying
Funds is permitted to engage in a wide range of investment policies. The risks
of the Underlying Funds are determined by the nature of the securities held
and the investment strategies used by the Funds' investment advisers. Certain
of these policies are described below and further information about the
investment policies, strategies and risks of the Underlying Funds is contained
in Appendix A to this Prospectus and in the Additional Statement as well as
the prospectuses of the Underlying Funds.
 
UNDERLYING EQUITY FUNDS
 
  The Underlying Equity Funds may purchase common stocks, preferred stocks,
interests in real estate investment trusts, convertible debt obligations,
convertible preferred stocks, equity interests in trusts, partnerships, joint
ventures, limited liability companies and similar enterprises, warrants and
stock purchase rights ("equity securities"). In choosing securities, a Fund's
investment adviser utilizes first-hand fundamental research, including
visiting company facilities to assess operations and to meet decision-makers.
An investment adviser may also use macro analysis of numerous economic and
valuation variables to anticipate changes in company earnings and the overall
investment climate. The investment advisers are able to draw on the research
and market expertise of the Goldman Sachs Global Investment Research
Department and other affiliates, as well as information provided by other
securities dealers. Equity securities held by an Underlying Fund will
generally be sold when an investment adviser believes that the market price
fully reflects or exceeds the securities' fundamental valuation or when other
more attractive investments are identified.
 
  DOMESTIC VALUE STYLE FUNDS. The Growth and Income, Mid Cap Equity and Small
Cap Value Funds are managed using a value oriented approach. The Funds'
investment adviser evaluates securities using fundamental analysis and intends
to purchase equity securities that are, in its view, underpriced relative to a
combination of such companies' long-term earnings prospects, growth rate, free
cash flow and/or dividend-paying ability.
 
  Consideration will be given to the business quality of the issuer. Factors
positively affecting the investment adviser's view of that quality include the
competitiveness and degree of regulation in the markets in which the company
operates, the existence of a management team with a record of success, the
position of the company in the markets in which it operates, the level of the
company's financial leverage and the sustainable return on capital invested in
the business. The Funds may also purchase securities of companies that have
experienced difficulties and that, in the opinion of the investment adviser,
are available at attractive prices.
 
  DOMESTIC GROWTH STYLE FUND. The Capital Growth Fund is managed using a
growth oriented approach. Equity securities for the Fund are selected based on
their prospects for above average growth. The Fund's investment adviser will
select securities of growth companies trading, in the investment adviser's
opinion, at a reasonable price relative to other industries, competitors and
historical price/earnings multiples. The Fund will generally invest in
companies whose earnings are believed to be in a relatively strong growth
trend, or, to a lesser extent, in companies in which significant further
growth is not anticipated but whose market value per share is thought to be
undervalued.
 
  QUANTITATIVE STYLE FUNDS. The CORE U.S. Equity, CORE Large Cap Growth, CORE
Small Cap Equity and CORE International Equity Funds (the "CORE Equity Funds")
are managed using both quantitative and fundamental techniques. CORE is an
acronym for "Computer-Optimized, Research-Enhanced," which reflects the Funds'
investment process. This investment process and the proprietary multifactor
model used to implement it are discussed below.
 
 
                                      15
<PAGE>
 
  Quantitative Investment Process. The Funds' investment advisers begin with a
broad universe of U.S. equity securities for the CORE U.S. Equity, CORE Large
Cap Growth and CORE Small Cap Equity Funds (the "CORE U.S. Equity Funds"), and
a broad universe of foreign equity securities for the CORE International
Equity Fund. The investment advisers use proprietary multifactor models (each
a "Multifactor Model") to forecast the returns of different markets,
currencies and individual securities. In the case of a U.S. equity security
followed by the Goldman Sachs Global Investment Research Department (the
"Research Department"), a rating is assigned based upon the Research
Department's evaluation. In the discretion of the investment adviser, ratings
may also be assigned to U.S. equity securities based on research ratings
obtained from other industry sources. In the case of a foreign equity
security, an investment adviser may rely on research from both the Research
Department and other industry sources.
 
  In building a diversified portfolio for each CORE Equity Fund, an investment
adviser utilizes optimization techniques to seek to maximize the Fund's
expected return, while maintaining a risk profile similar to the Fund's
benchmark. Each portfolio is primarily composed of securities rated highest by
the foregoing investment process and has risk characteristics and industry
weightings similar to the relevant Fund's benchmark.
 
  Quantitative Multifactor Models. The Multifactor Models are rigorous
computerized rating systems for forecasting the returns of different equity
markets, currencies, and individual equity securities according to fundamental
investment characteristics. The CORE U.S. Equity Funds use one Multifactor
Model to forecast the returns of securities held in each Fund's portfolio. The
CORE International Equity Fund uses multiple Multifactor Models to forecast
returns. Currently, the CORE International Equity Fund uses one model to
forecast equity market returns, one model to forecast currency returns and 22
separate models to forecast individual equity security returns in 22 different
countries. Despite this variety, all Multifactor Models incorporate common
variables covering measures of value, growth, momentum and risk (e.g.,
book/price ratio, earnings/price ratio, price momentum, price volatility,
consensus growth forecasts, earnings estimate revisions, earnings stability,
and, in the case of models for the CORE International Equity Fund, currency
momentum and country political risk ratings). All of the factors used in the
Multifactor Models have been shown to significantly impact the performance of
the securities, currencies and markets they were designed to forecast.
 
  The weightings assigned to the factors in the Multifactor Model used by the
CORE U.S. Equity Funds are derived using a statistical formulation that
considers each factor's historical performance in different market
environments. As such, the U.S. Multifactor Model is designed to evaluate each
security using only the factors that are statistically related to returns in
the anticipated market environment. Because they include many disparate
factors, the Funds' investment advisers believe that all the Multifactor
Models are broader in scope and provide a more thorough evaluation than most
conventional, quantitative models. Securities and markets ranked highest by
the relevant Multifactor Model do not have one dominant investment
characteristic; rather, they possess an attractive combination of investment
characteristics.
 
  Research Department. In assigning ratings to equity securities, the Research
Department uses a four category rating system ranging from "recommended for
purchase" to "likely to under perform." The ratings reflect the analyst's
judgment as to the investment results of a specific security and incorporate
economic outlook, valuation, risk and a variety of other factors.
 
  By employing both a quantitative (i.e., the Multifactor Models) and a
qualitative (i.e., research enhanced) method of selecting securities, each
CORE Fund seeks to capitalize on the strengths of each discipline.
 
  ACTIVELY MANAGED INTERNATIONAL FUNDS. The International Equity, Japanese
Equity, International Small Cap, Emerging Markets Equity and Asia Growth Funds
are managed using an active international approach,
 
                                      16
<PAGE>
 
which utilizes a consistent process of stock selection undertaken by portfolio
management teams located within each of the major investment regions,
including Europe, Japan, Asia and the United States. In selecting securities,
the investment adviser uses a long-term, bottom-up strategy based on first-
hand fundamental research that is designed to give broad exposure to the
available opportunities while seeking to add return primarily through stock
selection. Equity securities for these Funds are evaluated based on three key
factors--the business, the management and the valuation. The investment
adviser ordinarily seeks securities that have, in the investment adviser's
opinion, superior earnings growth potential, sustainable franchise value with
management attuned to creating shareholder value and relatively discounted
valuations. In addition, the investment adviser uses a multi-factor risk model
which seeks to assure that deviations from the benchmark are justifiable.
 
  REAL ESTATE SECURITIES FUND. The investment strategy of the Real Estate
Securities Fund is based on the premise that property market fundamentals are
the primary determinant of growth underlying the success of companies in the
real estate industry. The Fund's research and investment process is designed
to identify those companies with strong property fundamentals and strong
management teams. This process is comprised of real estate market research and
securities analysis. The Fund's investment adviser will take into account
fundamental trends in underlying property markets as determined by proprietary
models, research of local real estate markets, earnings, cash flow growth and
stability, the relationship between asset values and market prices of the
securities and dividend payment history. The investment adviser will attempt
to purchase securities so that its underlying portfolio will be diversified
geographically and by property type.
 
UNDERLYING FIXED-INCOME FUNDS
 
  The investment advisers of the Underlying Fixed-Income Funds may, in
accordance with the respective Funds' investment objectives and policies,
purchase all types of fixed-income securities, including senior and
subordinated corporate debt obligations (such as bonds, debentures, notes and
commercial paper), convertible and non-convertible corporate debt obligations,
loan participations and preferred stock.
 
  As stated above, each Underlying Fixed-Income Fund has policies relating to
its duration (or maturity in the case of the Financial Square Prime
Obligations Fund). A Fund's duration approximates its price sensitivity to
changes in interest rates. Maturity measures the time until final payment is
due; it takes no account of the pattern of a security's cash flows over time.
In computing portfolio duration, an Underlying Fund will estimate the duration
of obligations that are subject to prepayment or redemption by the issuer
taking into account the influence of interest rates on prepayments and coupon
flows. This method of computing duration is known as "option-adjusted"
duration. A Fund will not be limited as to its maximum weighted average
portfolio maturity or the maximum stated maturity with respect to individual
securities unless otherwise noted.
 
  Except for the Financial Square Prime Obligations Fund (which is subject to
more restrictive SEC regulations applicable to money market funds), an
Underlying Fixed-Income Fund will deem a security to have met its minimum
credit rating requirement if the security receives the minimum required long-
term rating (or the equivalent short-term credit rating) at the time of
purchase from at least one rating organization (including, but not limited to,
Standard & Poor's Ratings Group ("S&P") and Moody's Investors Service, Inc.
("Moody's")) even though it has been rated below the minimum rating by one or
more other rating organizations, or, if unrated by a rating organization, is
determined by the Fund's investment adviser to be of comparable quality. If a
security satisfies a Fund's minimum rating criteria at the time of purchase
and is subsequently downgraded below such rating, the Fund will not be
required to dispose of such security. If a downgrade occurs, the Fund's
investment adviser will consider what action, including the sale of such
security, is in the best interest of the Fund and its shareholders.
 
                                      17
<PAGE>
 
  The Underlying Funds may employ certain active management techniques to
manage their duration and term structure, to seek to hedge exposure to foreign
currencies and to seek to enhance returns. These techniques include (with
respect to one or more of the Funds), but are not limited to, the use of
financial futures contracts, option contracts (including options on futures),
forward foreign currency exchange contracts, currency options and futures,
currency, mortgage, credit and interest rate swaps and interest rate floors,
caps and collars. Currency and interest rate management techniques involve
risks different from those associated with investing solely in U.S. dollar-
denominated fixed-income securities of U.S. issuers. Certain of the Funds may
invest in custodial receipts, municipal securities and convertible securities.
The Funds may also employ other investment techniques to seek to enhance
returns, such as lending portfolio securities and entering into mortgage
dollar rolls, repurchase agreements, reverse repurchase agreements and other
investment practices, as described in Appendix A to this Prospectus.
 
 
                                  MANAGEMENT
 
 
TRUSTEES AND OFFICERS
 
  The Trustees are responsible for deciding matters of general policy and
reviewing the actions of the Investment Adviser, Distributor and transfer
agent. The officers of the Trust conduct and supervise the Portfolios' daily
business operations. The Additional Statement contains information as to the
identity of, and other information about, the Trustees and officers of the
Trust.
 
INVESTMENT ADVISER
 
  INVESTMENT ADVISER. Goldman Sachs Asset Management, One New York Plaza, New
York, New York 10004, a separate operating division of Goldman Sachs, serves
as investment adviser to each Portfolio and, except as noted, to each
Underlying Fund. Goldman Sachs registered as an investment adviser in 1981.
Goldman Sachs Funds Management, L.P., One New York Plaza, New York, New York
10004, a Delaware limited partnership which is an affiliate of Goldman Sachs,
serves as the investment adviser to the CORE U.S. Equity, Capital Growth,
Adjustable Rate Government and Short Duration Government Funds. Goldman Sachs
Funds Management, L.P. registered as an investment adviser in 1990. Goldman
Sachs Asset Management International, 133 Peterborough Court, London EC4A 2BB,
England, an affiliate of Goldman Sachs, serves as the investment adviser to
the International Equity, Japanese Equity, International Small Cap, Emerging
Markets Equity, Asia Growth and Global Income Funds. Goldman Sachs Asset
Management International became a member of the Investment Management
Regulatory Organization Limited in 1990 and registered as an investment
adviser in 1991. The Goldman Sachs Group, L.P., which controls the Investment
Adviser, has announced that it will pursue an initial public offering of the
firm during the fourth quarter of 1998; if the public offering is consummated,
The Goldman Sachs Group, L.P. will merge into the new public company, which
will be called The Goldman Sachs Group, Inc. As of July 24, 1998, GSAM,
together with its affiliates, acted as investment adviser or distributor for
assets in excess of $168 billion.
 
  Under an Asset Allocation Management Agreement ("Management Agreement") with
each Portfolio, the Investment Adviser, subject to the general supervision of
the Trustees, provides day-to-day advice as to each Portfolio's investment
transactions, including determinations concerning changes to (a) the
Underlying Funds in which the Portfolios may invest and (b) the percentage
range of assets of any Portfolio that may be invested in the Underlying Equity
Funds and the Underlying Fixed-Income Funds as separate groups. Goldman Sachs
has
 
                                      18
<PAGE>
 
agreed to permit the Portfolios to use the name "Goldman Sachs" or a
derivative thereof as part of each Portfolio's name for as long as a
Portfolio's Management Agreement is in effect.
 
  Under the Management Agreement, the Investment Adviser also: (a) supervises
all non-advisory operations of each Portfolio; (b) provides personnel to
perform such executive, administrative and clerical services as are reasonably
necessary to provide effective administration of each Portfolio; (c) at each
Portfolio's expense arranges for (i) the preparation of all required tax
returns, (ii) the preparation and submission of reports to existing
shareholders, (iii) the periodic updating of prospectuses and Additional
Statements (iv) the preparation of reports to be filed with the SEC and other
regulatory authorities; (d) maintains each Portfolio's records; and (e)
provides office space and all necessary office equipment and services.
 
FUND MANAGERS
 
- -------------------------------------------------------------------------------
<TABLE>
<S>                      <C>             <C>
                         YEARS PRIMARILY
     NAME AND TITLE        RESPONSIBLE          FIVE YEAR EMPLOYMENT HISTORY
<CAPTION>
- ------------------------ --------------- -------------------------------------------
<S>                      <C>             <C>
 Mark M. Carhart, Ph.D.,   Since 1998    Mr. Carhart joined the Investment Adviser
 CFA                                     in 1997 as a member of the Quantitative
 Vice President, Co-Head                 Research and Risk Management team. From
 Quantitative Research                   August 1995 to September 1997, he was
 and Senior Portfolio                    Assistant Professor of Finance at the
 Manager                                 Marshall School of Business at USC and a
                                         Senior Fellow of the Wharton Financial
                                         Institutions Center.
- ------------------------------------------------------------------------------------
 Raymond J. Iwanowski      Since 1998    Mr. Iwanowski joined the Investment Adviser
 Vice President, Co-Head                 in 1998. Prior to joining the Investment
 Quantitative Research                   Adviser, he spent three years at Salomon
 and Senior Portfolio                    Brothers, where he was a Vice President and
 Manager                                 head of the Fixed Derivatives Client
                                         Research group.
- ------------------------------------------------------------------------------------
 Neil Chriss, Ph.D.        Since 1998    Mr. Chriss joined the Investment Adviser in
 Vice President and                      1998. From 1996 to 1998, he worked in the
 Portfolio Manager                       equity division of Morgan Stanley Dean
                                         Witter. From 1994 to 1996, he was a post-
                                         doctoral fellow in the Mathematics
                                         Department of Harvard University.
- ------------------------------------------------------------------------------------
 Georgio DeSantis, Ph.D.   Since 1998    Mr. DeSantis joined the Investment Adviser
 Vice President and                      in 1998. From 1992 to 1998, he was
 Portfolio Manager                       Assistant Professor of Finance and Business
                                         Economics at the Marshall School of
                                         Business at USC.
- ------------------------------------------------------------------------------------
 William J. Fallon,        Since 1998    Mr. Fallon joined the Investment Adviser in
 Ph.D.                                   1998. From 1996 to 1998, he worked in the
 Vice President and                      Firmwide Risk Group of Goldman, Sachs & Co.
 Portfolio Manager                       From 1991 to 1996, he attended Columbia
                                         University, where he earned a Ph.D. in
                                         Finance.
- ------------------------------------------------------------------------------------
 Guang-Liang He, Ph.D.     Since 1998    Mr. He joined the Investment Adviser in
 Vice President and                      1998. In 1997, he worked in the Firmwide
 Portfolio Manager                       Risk Group of Goldman, Sachs & Co. From
                                         1992 to 1997, he worked at Quantitative
                                         Financial Strategies, Inc.
</TABLE>
 
 
  It is the responsibility of the investment adviser of each Underlying Fund
to make the investment decisions for that Fund and to place the purchase and
sale orders for the Fund's portfolio transactions in U.S. and foreign markets.
Such orders may be directed to any broker including, to the extent and in the
manner permitted by applicable law, Goldman Sachs or its affiliates. In
effecting purchases and sales of portfolio securities for a Fund, its
investment adviser will seek the best price and execution of the Fund's
orders. In doing so, where two or more brokers or dealers offer comparable
prices and execution for a particular trade, consideration may be given to
whether the broker or dealer provides investment research or brokerage
services or sells Shares of any Underlying Fund. See the Additional Statement
for a further description of the investment adviser's brokerage allocation
practices.
 
                                      19
<PAGE>
 
  As compensation for its services and assumption of certain expenses pursuant
to the Management Agreement, GSAM is entitled to a fee, computed daily and
payable monthly, at the annual rate equal to 0.35% of each Portfolio's average
daily net assets. The Investment Adviser has voluntarily agreed to waive 0.20%
of this fee. The Investment Adviser may discontinue or modify its voluntary
waiver in the future in its discretion.
 
  The Investment Adviser has voluntarily agreed to reduce or limit certain
"Other Expenses" of the Portfolios (excluding management and service fees,
transfer agency fees, taxes, interest, brokerage fees, and litigation,
indemnification and other extraordinary expenses) to the extent such expenses
exceed 0.00% per annum of a Portfolio's average daily net assets. Such
reductions or limits, if any, may be discontinued or modified by the
Investment Adviser in its discretion at any time.
 
  In addition, each Portfolio, as a shareholder in the Underlying Funds, will
indirectly bear its proportionate share of any investment management fees and
other expenses paid by the Underlying Funds. The contractual management fee
payable to GSAM and/or its affiliates by each of the Underlying Funds in which
the Portfolios may invest is set forth below under "Expenses."
 
  In performing its investment advisory services, the investment adviser of an
Underlying Fund, while remaining ultimately responsible for the management of
the Fund, may rely upon the asset management division of its Singapore and
Tokyo affiliates for portfolio decisions and management with respect to
certain portfolio securities and is able to draw upon the research and
expertise of its other affiliate offices. In addition, the investment adviser
will have access to the research of, and proprietary technical models
developed by, Goldman Sachs and may apply quantitative and qualitative
analysis in determining the appropriate allocations among the categories of
issuers and types of securities.
 
  ACTIVITIES OF GOLDMAN SACHS AND ITS AFFILIATES AND OTHER ACCOUNTS MANAGED BY
GOLDMAN SACHS. The involvement of the Funds' investment advisers, Goldman
Sachs and their affiliates in the management of, or their interest in, other
accounts and other activities of Goldman Sachs may present conflicts of
interest with respect to an Underlying Fund or limit the investment activities
of an Underlying Fund. Goldman Sachs and its affiliates engage in proprietary
trading and advise accounts and funds which have investment objectives similar
to those of the Underlying Funds and/or which engage in and compete for
transactions in the same type of securities, currencies and instruments.
Goldman Sachs and its affiliates will not have any obligation to make
available any information regarding their proprietary activities or
strategies, or the activities or strategies used for other accounts managed by
them, for the benefit of the management of the Underlying Funds.The results of
the investment activities of an Underlying Fund, therefore, may differ from
those of Goldman Sachs and its affiliates and it is possible that the
Portfolios and the Underlying Funds could sustain losses during periods in
which Goldman Sachs and its affiliates and other accounts achieve significant
profits on their trading for proprietary or other accounts. In addition, the
Underlying Funds may, from time to time, enter into transactions in which
other clients of Goldman Sachs have an adverse interest. From time to time,
the activities of an Underlying Fund may be limited because of regulatory
restrictions applicable to Goldman Sachs and its affiliates, and/or their
internal policies designed to comply with such restrictions. See "Management--
Activities of Goldman Sachs and its Affiliates and Other Accounts Managed by
Goldman Sachs" in the Additional Statement for further information.
 
DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs, 85 Broad Street, New York, New York 10004, serves as the
exclusive Distributor of each Portfolio's Shares. Goldman Sachs, 4900 Sears
Tower, Chicago, Illinois 60606, also serves as each Portfolio's transfer agent
(the "Transfer Agent") and as such performs various shareholder servicing
functions. As compensation for the services rendered to each Portfolio by
Goldman Sachs (as Transfer Agent), Goldman Sachs
 
                                      20
<PAGE>
 
is entitled to receive a transfer agency fee with respect to each Portfolio's
Service Shares equal, on an annual basis, to 0.04% of average daily net
assets. Shareholders with inquiries regarding a Portfolio should contact
Goldman Sachs (as Transfer Agent) at the address or the telephone number set
forth on the back cover page of this Prospectus.
 
  From time to time, Goldman Sachs or any of its affiliates may purchase and
hold Shares of the Underlying Funds or Portfolios. Goldman Sachs reserves the
right to redeem at any time some or all of the Shares acquired for its own
account.
 
YEAR 2000
 
  Many computer systems were designed using only two digits to signify the
year (for example, "98" for "1998"). On January 1, 2000, if these computer
systems are not corrected, they may incorrectly interpret "00" as the year
"1900" rather than the year "2000," leading to computer shutdowns or errors
(commonly known as the "Year 2000 Problem"). To the extent these systems
conduct forward-looking calculations, these computer problems may occur prior
to January 1, 2000. Like other investment companies and financial and business
organizations, the Portfolios could be adversely affected in their ability to
process securities trades, price securities, provide shareholder account
services and otherwise conduct normal business operations if the computer
systems used by the Investment Adviser or other Portfolio service providers do
not adequately address this problem in a timely manner. The Investment Adviser
has established a dedicated group to analyze these issues and to implement the
systems modifications necessary to prepare for the Year 2000 Problem.
Currently, the Investment Adviser does not anticipate that the transition to
the 21st Century will have any material impact on its ability to continue to
service the Portfolios at current levels. In addition, the Investment Adviser
has sought assurances from the Portfolios' other service providers that they
are taking the steps necessary so that they do not experience Year 2000
Problems, and the Investment Adviser will continue to monitor the situation.
At this time, however, no assurance can be given that the actions taken by the
Investment Adviser and the Portfolios' other service providers will be
sufficient to avoid any adverse effect on the Portfolios due to the Year 2000
Problem.
 
 
                                   EXPENSES
 
 
  The Portfolios are responsible for the payment of their expenses. The
expenses include, without limitation, asset allocation; custodial and transfer
agency fees; service fees paid to Service Organizations; brokerage fees and
commissions; filing fees for the registration or qualification of the
Portfolios' Shares under federal or state securities laws: organizational
expenses; fees and expenses incurred in connection with membership in
investment company organizations; taxes; interest; costs of liability
insurance; fidelity bonds or indemnification; any costs, expenses or losses
arising out of any liability of, or claim for damages or other relief asserted
against, the Portfolios for violation of any law; legal and auditing fees and
expenses (including the cost of legal and certain accounting services rendered
by employees of the Investment Adviser and its affiliates with respect to the
Portfolios); expenses of preparing and setting in type prospectuses,
Additional Statements, proxy material, financial reports and notices and the
printing and distributing of the same to shareholders and regulatory
authorities, compensation and expenses of the Trust's "non-interested"
Trustees and extraordinary expenses, if any, incurred by the Trust.
 
  The expenses associated with investing in a "fund of funds," such as the
Portfolios, are generally higher than those of investment companies that do
not invest in other mutual funds. These increased expenses stem from the fact
that investors must indirectly pay a portion of the operating costs of the
Underlying Funds. The structure of the Portfolios will, however, reduce any
layering of costs in the following manner: (a) any fees
 
                                      21
<PAGE>
 
charged to the Portfolios under the Management Agreement are for services that
are in addition to, and not duplicative of, services provided under any
Underlying Fund's management agreement; (b) the Portfolios pay no front-end or
contingent deferred sales charges in connection with the purchase or
redemption of Shares of the Underlying Funds; (c) the Portfolios do not pay
any sales charges, distribution-related fees or service fees related to the
Shares of the Underlying Funds; (d) custodial and other fees charged by both
the Portfolios and the Underlying Funds are not redundant inasmuch as distinct
services are being provided at each level; and (e) any additional incremental
cost incurred by investing in the Portfolios is in return for a substantial
investment management service, namely the initial and ongoing asset allocation
of investments made in the Underlying Funds, and provision of meaningful
additional diversification benefits.
 
  The following chart shows the total operating expense ratios (management fee
plus other operating expenses) of Institutional Shares of each Underlying Fund
for the Fund's most recent fiscal year (except as indicated). In addition, the
following chart shows the contractual investment management fees payable to
GSAM and its affiliates by the Underlying Funds (in each case as an annualized
percentage of the Fund's average net assets). Absent voluntary fee waivers
and/or expense reimbursements, which may be discontinued at any time, the
total operating expense ratios of certain Underlying Funds would be higher.
 
<TABLE>
<CAPTION>
                                                  CONTRACTUAL   TOTAL OPERATING
    UNDERLYING FUNDS                             MANAGEMENT FEE EXPENSE RATIO*
    ----------------                             -------------- ---------------
<S>                                              <C>            <C>
Short Duration Government Fund..................      0.50%          0.54%
Adjustable Rate Government Fund.................      0.40%          0.49%
Core Fixed-Income Fund..........................      0.40%          0.54%
Government Income Fund..........................      0.65%          0.58%
Global Income Fund..............................      0.90%          0.69%
High Yield Fund.................................      0.70%          0.76%
Growth & Income Fund............................      0.70%          0.79%
CORE U.S. Equity Fund...........................      0.75%          0.74%
CORE Large Cap Growth Fund......................      0.75%          0.64%
CORE Small Cap Equity Fund......................      0.85%          0.93%
Capital Growth Fund.............................      1.00%          1.04%
CORE International Equity Fund..................      0.85%          1.01%
Mid Cap Equity Fund.............................      0.75%          0.89%
Small Cap Value Fund............................      1.00%          1.10%
International Equity Fund.......................      1.00%          1.14%
Japanese Equity Fund............................      1.00%          1.05%
International Small Cap Fund....................      1.20%          1.40%
Emerging Markets Equity Fund....................      1.20%          1.39%
Asia Growth Fund................................      1.00%          1.20%
Real Estate Securities Fund.....................      1.00%          1.04%
Financial Square Prime Obligations Money Market
 Fund...........................................     0.205%          0.18%
</TABLE>
- --------
* Operating expenses of Institutional Shares for the Underlying Funds have
  been restated to reflect fees and expenses in effect as of September 1,
  1998.
 
                                      22
<PAGE>
 
 
                                NET ASSET VALUE
 
 
  The NAV per Share of each class of a Portfolio is calculated by the
Portfolio's custodian as of the close of regular trading on the New York Stock
Exchange (which is normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m.
New York time), on each Business Day (as such term is defined under
"Additional Information"). NAV per Share of each class is calculated by
determining the net assets attributed to each class and dividing by the number
of outstanding Shares of that class. Portfolio securities are valued based on
market quotations or, if accurate quotations are not readily available, at
fair value as determined in good faith under procedures established by the
Trustees.
 
 
                            PERFORMANCE INFORMATION
 
 
  From time to time each Portfolio may publish average annual total return,
yield and distribution rates in advertisements and communications to
shareholders or prospective investors. Average annual total return is
determined by computing the average annual percentage change in value of
$1,000 invested at the maximum public offering price for specified periods
ending with the most recent calendar quarter, assuming reinvestment of all
dividends and distributions at NAV. The total return calculation assumes a
complete redemption of the investment at the end of the relevant period. Each
Portfolio may also from time to time advertise total return on a cumulative,
average, year-by-year or other basis for various specified periods by means of
quotations, charts, graphs or schedules. In addition to the above, each
Portfolio may from time to time advertise its performance relative to certain
averages, performance rankings, indices, other information prepared by
recognized mutual fund statistical services and investments for which reliable
performance information is available.
 
  The Portfolios compute their yield by dividing net investment income earned
during a recent thirty-day period by the product of the average daily number
of Shares outstanding and entitled to receive dividends during the period and
the maximum offering price per share on the last day of the relevant period.
The results are compounded on a bond equivalent (semi-annual) basis and then
annualized. Net investment income per share is equal to the dividends and
interest earned during the period, reduced by accrued expenses for the period.
The calculation of net investment income for these purposes may differ from
the net investment income determined for accounting purposes. The Portfolios'
quotations of distribution rate are calculated by annualizing the most recent
distribution of net investment income for a monthly, quarterly or other
relevant period and dividing this amount by the NAV per Share on the last day
of the period for which the distribution rate is being calculated.
 
  Each Portfolio's total return, yield and distribution rate will be
calculated separately for each class of Shares in existence. Because each
class of Shares may be subject to different expenses, the total return, yield
and distribution rate calculations with respect to each class of Shares for
the same period will differ. See "Shares of the Trust."
 
  Each Portfolio's performance quotations do not reflect any fees charged by a
Service Organization to its customer accounts in connection with investments
in the Portfolios. The investment results of a Portfolio will fluctuate over
time and any presentation of investment results for any prior period should
not be considered a representation of what an investment may earn or what the
Portfolio's performance may be in any future period. In addition to
information provided in shareholder reports, the Portfolios may, in their
discretion, from time to time make a list of their holdings available to
investors upon request.
 
                                      23
<PAGE>
 
 
                              SHARES OF THE TRUST
 
 
  Each Portfolio is classified as "diversified" under the Investment Company
Act of 1940, as amended (the "1940 Act"). Each Portfolio is a series of
Goldman Sachs Trust, which was formed under the laws of the State of Delaware
on January 28, 1997. The Trustees have authority under the Trust's Declaration
of Trust to create and classify Shares of beneficial interests in separate
series, without further action by shareholders. Additional series may be added
in the future. The Trustees also have authority to classify and reclassify any
series or portfolio of Shares into one or more classes. Information about the
Trust's other series and classes is contained in separate prospectuses.
 
  When issued, Shares are fully paid and non-assessable. In the event of
liquidation, shareholders of each class are entitled to share pro rata in the
net assets of the applicable Portfolio available for distribution to such
shareholders. All Shares are freely transferable and have no preemptive,
subscription or conversion rights. Shareholders are entitled to one vote per
Share, provided that, at the option of the Trustees, shareholders will be
entitled to a number of votes based upon the NAVs represented by their Shares.
 
  The Trust does not intend to hold annual meetings of shareholders. However,
recordholders may, under certain circumstances, as permitted by the Act,
communicate with other shareholders in connection with requiring a special
meeting of shareholders. The Trustees will call a special meeting of
shareholders for the purpose of electing Trustees if, at any time, less than a
majority of Trustees holding office at the time were elected by shareholders.
 
  In the interest of economy and convenience, the Trust does not issue
certificates representing the Portfolios' Shares. Instead, the Transfer Agent
maintains a record of each shareholder's ownership. Each shareholder receives
confirmation of purchase and redemption orders from the Transfer Agent.
Portfolio Shares and any dividends and distributions paid by a Portfolio are
reflected in account statements from the Transfer Agent.
 
 
                                   TAXATION
 
FEDERAL TAXES
 
  Each Portfolio is treated as a separate entity for tax purposes. Each
Portfolio intends to elect to be treated as a regulated investment company and
qualify for such treatment for each taxable year under Subchapter M of the
Internal Revenue Code of 1986, as amended (the "Code"). To qualify as such, a
Portfolio must satisfy certain requirements relating to the sources of its
income, diversification of its assets and distribution of its income to
shareholders. As a regulated investment company, a Portfolio will not be
subject to federal income or excise tax on any net investment income and net
realized capital gains that are distributed to its shareholders in accordance
with certain timing requirements of the Code.
 
  Dividends paid by a Portfolio from net investment income, certain net
realized foreign exchange gains, the excess of net short-term capital gain
over net long-term capital loss and original issue discount or market discount
income will be taxable to its shareholders as ordinary income. Distributions
out of the net capital gain (the excess of net long-term capital gain over net
short-term capital loss), if any, of a Portfolio will be taxed to shareholders
as long-term capital gains, regardless of the length of time a shareholder has
held his or her Shares or whether such gain was reflected in the price paid
for the Shares. These tax consequences will apply whether distributions
 
                                      24
<PAGE>
 
are received in cash or reinvested in Shares. A Portfolio's dividends that are
paid to its corporate shareholders and are attributable to qualifying
dividends such Portfolio or an Underlying Fund receives from U.S. domestic
corporations may be eligible, in the hands of such corporate shareholders, for
the corporate dividends-received deduction, subject to certain holding period
requirements and debt financing limitations under the Code. A portion of each
Portfolio's dividends may generally qualify, in the hands of corporate
shareholders, for the corporate dividends-received deduction. Certain
distributions paid by a Portfolio in January of a given year may be taxable to
shareholders as if received the prior December 31. Shareholders will be
informed annually about the amount and character of distributions received
from the Portfolios for federal income tax purposes.
 
  Investors should consider the tax implications of buying Shares immediately
prior to a distribution. Investors who purchase Shares shortly before the
record date for a distribution will pay a per share price that includes the
value of the anticipated distribution and will be taxed on the distribution
even though the distribution represents a return of a portion of the purchase
price.
 
  Redemptions and exchanges of Shares are taxable events.
 
  Individuals and certain other classes of shareholders may be subject to 31%
backup withholding of federal income tax on distributions, redemptions and
exchanges if they fail to furnish their correct taxpayer identification number
and certain certifications required by the Internal Revenue Service or if they
are otherwise subject to backup withholding. Individuals, corporations and
other shareholders that are not U.S. persons under the Code are subject to
different tax rules and may be subject to nonresident alien withholding at the
rate of 30% (or a lower rate provided by an applicable tax treaty, if any) on
amounts treated as ordinary dividends from the Portfolios.
 
  Each Portfolio may be subject to foreign withholding or other foreign taxes
on income or gain from certain foreign securities. In general, the Portfolios
do not anticipate that they will be eligible to pass any foreign tax credits
through to their shareholders; however, the Portfolios may deduct these taxes
in computing their taxable income, if any.
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local
or foreign taxes on payments received from the Portfolios. A state income (and
possibly local income and/or intangible property) tax exemption may be
generally available to the extent (if any) a Portfolio's distributions are
derived from interest on (or, in the case of intangible property taxes, the
value of its assets is attributable to) certain U.S. Government obligations,
provided in some states that certain thresholds for holdings of such
obligations and/or reporting requirements are satisfied. For a further
discussion of certain tax consequences of investing in Shares of the
Portfolios, see "Taxation" in the Additional Statement. Shareholders are urged
to consult their own tax advisers regarding specific questions as to federal,
state and local taxes as well as to any foreign taxes.
 
 
                            ADDITIONAL INFORMATION
 
 
  As used in this Prospectus, the term "Business Day" means any day the New
York Stock Exchange is open for trading, which is Monday through Friday except
for holidays. The New York Stock Exchange is closed on the following holidays:
New Year's Day, Martin Luther King, Jr. Day, Presidents' Day (observed), Good
Friday, Memorial Day (observed), Independence Day, Labor Day, Thanksgiving Day
and Christmas Day.
 
                                      25
<PAGE>
 
 
                              ADDITIONAL SERVICES
 
 
  The Trust, on behalf of the Portfolios, has adopted a Service Plan with
respect to the Service Shares which authorizes a Portfolio to compensate
certain institutions ("Service Organizations") for providing account
administration and personal and account maintenance services to their
customers who are beneficial owners of such Shares. The Trust, on behalf of
the Portfolios, enters into agreements with Service Organizations which
purchase Service Shares on behalf of their customers ("Service Agreements").
The Service Agreements provide for compensation to the Service Organizations
in an amount up to 0.50% (on an annualized basis) of the average daily net
assets of the Service Shares of the Portfolios attributable to or held in the
name of the Service Organization for its customers; provided, however, that
the fee paid for personal and account maintenance services shall not exceed
0.25% of such average daily net assets. The services provided by the Service
Organizations may include acting, directly or through an agent, as the sole
shareholder of record, maintaining account records for customers, processing
orders to purchase, redeem or exchange Service Shares for customers,
responding to inquiries from prospective and existing shareholders and
assisting customers with investment procedures.
 
  The Trust may authorize certain Service Organizations to accept on the
Trust's behalf orders placed by their customers and, if approved by the Trust,
to designate other intermediaries to accept such orders. In these cases, a
Portfolio will be deemed to have received an order in proper form when the
order is accepted by the authorized Service Organization or intermediary on a
Business Day, and the order will be priced at a Portfolio's net asset value
per share next determined after such acceptance. The Service Organization or
intermediary will be responsible for transmitting accepted orders to the Trust
within the period agreed upon by them. A customer may contact its Service
Organization to learn whether the Service Organization is authorized to accept
orders. Service Organizations that are authorized to accept orders for the
Trust may receive payments from the Portfolios or Goldman Sachs that are in
addition to the payments payable by the Trust under the Service Plan.
 
  Holders of Service Shares of a Portfolio bear the expenses and fees paid to
Service Organizations under the Service Plan as well as any other expenses
which are directly attributable to such Shares.
 
  Service Organizations may charge other fees to their customers who are the
beneficial owners of Service Shares in connection with their customer
accounts. These fees would be in addition to any amounts received by the
Service Organization under a Service Agreement and may affect the return
earned on an investment in a Portfolio. The Trust, on behalf of the
Portfolios, accrues payments made pursuant to a Service Agreement daily. All
inquiries of beneficial owners of Service Shares should be directed to such
owners' Service Organizations.
 
 
                            REPORTS TO SHAREHOLDERS
 
 
  Recordholders of Service Shares of the Portfolios will receive an annual
report containing audited financial statements and a semiannual report. Each
recordholder of Service Shares will also be provided with a printed
confirmation for each transaction in its account and a quarterly account
statement. A year-to-date statement for any account will be provided upon
request made to Goldman Sachs.
 
  Service Organizations will be responsible for providing services similar to
those described above to their customers who are the beneficial owners of such
Shares. For example, Service Organizations are responsible for
 
                                      26
<PAGE>
 
providing each customer exercising investment discretion with monthly
statements with respect to such customer's account in lieu of an immediate
confirmation of each transaction.
 
 
                                   DIVIDENDS
 
 
  Each dividend from net investment income and capital gain distributions, if
any, declared by a Portfolio on its outstanding Service Shares will, at the
election of each shareholder, be paid (i) in cash or (ii) in additional
Service Shares of such Portfolio. This election should initially be made on a
shareholder's Account Information Form and may be changed upon written notice
to Goldman Sachs at any time prior to the record date for a particular
dividend or distribution. If no election is made, all dividends from net
investment income and capital gain distributions will be reinvested in Service
Shares of the applicable Portfolio.
 
  The election to reinvest dividends and distributions paid by a Portfolio in
additional Service Shares of the Portfolio will not affect the tax treatment
of such dividends and distributions, which will be treated as received by the
shareholder and then used to purchase Service Shares of a Portfolio.
 
  Each Portfolio intends that all or substantially all of its net investment
income and net capital gains, after reduction by available capital losses,
including any capital losses carried forward from prior years, will be
declared as dividends for each taxable year. The Income Strategy Portfolio
will pay dividends from net investment income monthly. The Growth and Income
Strategy Portfolio and Growth Strategy Portfolio will each pay dividends from
net investment income quarterly. The Aggressive Growth Strategy Portfolio will
pay dividends from net investment income annually. Each Portfolio will pay
dividends from net realized capital gains, reduced by available capital
losses, at least annually. From time to time, a portion of a Portfolio's
dividends may constitute a return of capital.
 
  At the time of an investor's purchase of Shares of a Portfolio a portion of
the NAV per Share may be represented by undistributed income of the Portfolio
or realized or unrealized appreciation of the Portfolio's investments.
Therefore, subsequent distributions on such Shares from such income or
realized appreciation may be taxable to the investor even if the NAV of the
investor's Shares is, as a result of the distributions, reduced below the cost
of such Shares and the distributions (or portions thereof) represent a return
of a portion of the purchase price.
 
 
                          PURCHASE OF SERVICE SHARES
 
 
  Customers of Service Organizations may invest in Service Shares only through
their Service Organizations. Service Shares may be purchased on any Business
Day at the NAV per Share next determined after receipt of an order by Goldman
Sachs from a Service Organization. (See "Additional Services" for a
description of limited situations where a Service Organization or another
intermediary may be authorized to accept orders for the Portfolios.) No sales
load will be charged. Currently, each Portfolio's NAV is determined as of the
close of regular trading on the New York Stock Exchange (which is normally,
but not always, 3:00 p.m. Chicago time, 4:00 p.m. New York time), as described
under "Net Asset Value." Purchases of Service Shares of the Portfolio must be
settled within three (3) Business Days of the receipt of a complete purchase
order. Payment of the proceeds of redemption of Shares purchased by check may
be delayed for a period of time as described under "Redemption of Service
Shares."
 
                                      27
<PAGE>
 
  The Service Organizations are responsible for the timely transmittal of
purchase orders to Goldman Sachs and payments to State Street Bank and Trust
Company ("State Street"). In order to facilitate timely transmittal, the
Service Organizations have established times by which purchase orders and
payments must be received by them.
 
PURCHASE PROCEDURES
 
  Purchases of Service Shares may be made by placing an order with Goldman
Sachs at 800-621-2550 and either wiring federal funds to State Street or
initiating an ACH transfer. Purchases may also be made by a Service
Organization by check (except that the Trust will not accept a check drawn on
a foreign bank or a third party check) or Federal Reserve draft made payable
to "Goldman Sachs Asset Allocation Portfolios--Name of Portfolio and Class of
Shares" and should be directed to "Goldman Sachs Asset Allocation Portfolios--
Name of Portfolio and Class of Shares," c/o National Financial Data Services,
Inc. ("NFDS"), P.O. Box 419711, Kansas City, MO 64141-6711.
 
OTHER PURCHASE INFORMATION
 
  The Portfolios do not have any minimum purchase or account requirements with
respect to Service Shares. A Service Organization may, however, impose a
minimum amount for initial and subsequent investments in Service Shares, and
may establish other requirements such as a minimum account balance. A Service
Organization may effect redemptions of noncomplying accounts, and may impose a
charge for any special services rendered to its customers. Customers should
contact their Service Organization for further information concerning such
requirements and charges.
 
  The Investment Adviser, Distributor, and/or their affiliates also pay
additional compensation from time to time, out of their assets and not as an
additional charge to the Portfolios, to selected Service Organizations and
other persons in connection with the sale of Shares of the Portfolios, the
Underlying Funds and other investment portfolios of the Trust (such as
additional payments based on new sales, amounts exceeding pre-established
thresholds, or the length of time customers' assets have remained in the
Trust) and, subject to applicable NASD regulations, contribute to various non-
cash and cash incentive arrangements to promote the sale of Shares, as well as
sponsor various educational programs, sales contests and/or promotions in
which participants may receive reimbursement of expenses, entertainment and
prizes such as travel awards, merchandise, cash, investment research and
educational information and related support materials. This additional
compensation can vary among Service Organizations depending upon such factors
as the amounts their customers have invested (or may invest) in particular
investment portfolios of the Trust, the particular program involved, or the
amount of reimbursable expenses. Additional compensation based on sales may,
but is currently not expected to, exceed 0.50% (annualized) of the amount
invested. For further information, see the Additional Statement.
 
  The Portfolios and Goldman Sachs each reserve the right to redeem the
Service Shares of any Service Organization whose account balance is less than
$50 as a result of earlier redemptions. Such redemptions will not be
implemented if the value of a recordholder's account falls below the minimum
account balance solely as a result of market conditions. The Trust will give
sixty (60) days' prior written notice to Service Organizations whose Service
Shares are being redeemed to allow them to purchase sufficient additional
Service Shares of a Portfolio to avoid such redemption.
 
  The Portfolios and Goldman Sachs each reserve the right to reject any
specific purchase order (including exchanges) or to restrict purchases or
exchanges by a particular purchaser (or group of related purchasers). This may
occur, for example, when a purchaser or group of purchasers' pattern of
frequent purchases, sales or
 
                                      28
<PAGE>
 
exchanges of Service Shares of a Portfolio is evident, or if purchases, sales
or exchanges are, or a subsequent abrupt redemption might be, of a size that
would disrupt management of a Portfolio.
 
  In the sole discretion of Goldman Sachs, a Portfolio may accept securities
instead of cash for the purchase of Shares of the Portfolio. Such purchases
will be permitted only if the Investment Adviser determines that any
securities acquired in this manner are consistent with the Portfolio's
investment objectives, restrictions and policies and are desirable investments
for the Portfolio.
 
 
                              EXCHANGE PRIVILEGE
 
 
  Service Shares of a Portfolio may be exchanged by a Service Organization for
(i) Service Shares of any other mutual fund sponsored by Goldman Sachs and
designated as an eligible fund for this purpose and (ii) the corresponding
class of any Goldman Sachs Money Market Fund at the NAV next determined either
by writing to Goldman Sachs, Attention: Goldman Sachs Asset Allocation
Portfolios--Name of Portfolio and Class of Shares, c/o GSAM Shareholder
Services, 4900 Sears Tower, Chicago, Illinois 60606 or, if previously elected
in the Portfolio's Account Information Form, by telephone at 800-621-2550
(7:00 a.m. to 5:30 p.m. Chicago time). A shareholder should obtain and read
the prospectus relating to any other Fund and its Shares and consider its
investment objective, policies and applicable fees before making an exchange.
Service Shares acquired by telephone exchange must be registered in the same
name(s) and have the same address as Service Shares of the Fund for which the
exchange is being made.
 
  In an effort to prevent unauthorized or fraudulent exchanges by telephone,
Goldman Sachs employs reasonable procedures as set forth under "Redemption of
Service Shares" to confirm that such instructions are genuine. In times of
drastic economic or market changes the telephone exchange privilege may be
difficult to implement. For federal income tax purposes, an exchange is
treated as a sale of the Service Shares surrendered in the exchange on which
an investor may realize a gain or loss, followed by a purchase of Service
Shares, or the corresponding class of any Goldman Sachs Money Market Fund
received in the exchange. Shareholders should consult their own tax adviser
concerning the tax consequences of an exchange. Exchanges are available only
in states where exchanges may legally be made. The exchange privilege may be
materially modified or withdrawn at any time on sixty (60) days' written
notice to recordholders of Service Shares and is subject to certain
limitations. See "Purchase of Service Shares."
 
 
                         REDEMPTION OF SERVICE SHARES
 
 
  The Portfolios will redeem their Service Shares upon request of a
recordholder of such Shares on any Business Day at the NAV next determined
after receipt of a request in proper form by Goldman Sachs. (See "Additional
Services" for a description of limited situations where a Service Organization
or another intermediary may be authorized to accept requests for the
Portfolios.) If Service Shares to be redeemed were recently purchased by
check, a Portfolio may delay transmittal of redemption proceeds until such
time as it has assured itself that good funds have been collected for the
purchase of such Service Shares. This may take up to fifteen (15) days.
Redemption requests may be made by a Service Organization by writing to or
calling the Transfer Agent at the address or telephone number set forth on the
back cover of this Prospectus. A Service Organization may request redemptions
by telephone if the optional telephone redemption privilege is elected on the
Account Information Form accompanying this Prospectus. It may be difficult to
implement redemptions by telephone in times of drastic economic or market
changes.
 
                                      29
<PAGE>
 
  In an effort to prevent unauthorized or fraudulent redemption or exchange
requests by telephone, Goldman Sachs employs reasonable procedures specified
by the Trust to confirm that such instructions are genuine. Among other
things, any redemption request that requires money to go to an account or
address other than that designated on the Account Information Form must be in
writing and signed by an authorized person designated on the Account
Information Form. Any such written request is also confirmed by telephone with
both the requesting party and the designated bank account to verify
instructions. Exchanges among accounts with different names, addresses and
social security or other taxpayer identification numbers must be in writing
and signed by an authorized person designated on the Account Information Form.
Other procedures may be implemented from time to time concerning telephone
redemptions and exchanges. If reasonable procedures are not implemented, the
Trust may be liable for any loss due to unauthorized or fraudulent
transactions. In all other cases, neither the Portfolios, the Trust nor
Goldman Sachs will be responsible for the authenticity of redemption or
exchange instructions received by telephone.
 
  The Portfolios will arrange for the proceeds of redemptions effected by any
means to be wired as federal funds to the recordholder of Service Shares or,
if the recordholder elects in writing, by check. Redemption proceeds paid by
wire transfer will normally be wired on the next Business Day in federal funds
(for a total one-day delay), but may be paid up to three (3) Business Days
after receipt of a properly executed redemption request. Wiring of redemption
proceeds may be delayed one additional Business Day if the Federal Reserve
Bank is closed on the day redemption proceeds would originally be wired.
Redemption proceeds paid by check will normally be mailed to the address of
record within three (3) Business Days of receipt of a properly executed
redemption request. Once wire transfer instructions have been given by Goldman
Sachs, neither the Portfolios, the Trust nor Goldman Sachs assumes any further
responsibility for the performance of intermediaries or the customer's Service
Organization in the transfer process. If a problem with such performance
arises, the customer should deal directly with such intermediaries or Service
Organizations.
 
  Additional documentation regarding a redemption by any means may be required
to effect a redemption when deemed appropriate by Goldman Sachs. The request
for such redemption will not be considered to have been received in proper
form until such additional documentation has been submitted to the Transfer
Agent by the recordholder of Service Shares.
 
  Service Organizations are responsible for the timely transmittal of
redemption requests by their customers to the Transfer Agent. In order to
facilitate timely transmittal of redemption requests, Service Organizations
have established times by which redemption requests must be received by them.
Additional documentation may be required when deemed appropriate by a Service
Organization.
 
                                      30
<PAGE>
 
 
                                  APPENDIX A
 
 
  This Appendix describes various investments and investment techniques that
may be used by the Underlying Funds. This Appendix also describes certain
risks associated with these investments and techniques. Further information is
provided in the Additional Statement and in the prospectuses of the Underlying
Funds.
 
  As noted above, the Underlying Equity Funds invest primarily in common
stocks and other equity securities (including real estate investment trusts),
and the Underlying Fixed-Income Funds invest primarily in fixed income
securities. The Short Duration Government and Adjustable Rate Government Funds
invest in U.S. Government securities and related repurchase agreements, and
neither of these Funds, the Government Income Fund nor the Financial Square
Prime Obligations Fund makes foreign investments. The investments of the
Financial Square Prime Obligations Fund are limited by SEC regulations
applicable to money market funds as described in its prospectus, and do not
include many of the types of investments discussed below that are permitted
for the other Underlying Funds. With these exceptions, and the further
exceptions noted below, the following description applies generally to the
Underlying Funds.
 
  (1) DESCRIPTION OF INVESTMENTS AND INVESTMENT TECHNIQUES OF THE UNDERLYING
                                     FUNDS
 
CONVERTIBLE SECURITIES
 
  The Underlying Funds may invest in convertible securities, including debt
obligations and preferred stock of the issuer convertible at a stated exchange
rate into common stock of the issuer. Convertible securities generally offer
lower interest or dividend yields than non-convertible securities of similar
quality. As with all fixed-income securities, the market value of convertible
securities tends to decline as interest rates increase and, conversely, to
increase as interest rates decline. However, when the market price of the
common stock underlying a convertible security exceeds the conversion price,
the convertible security tends to reflect the market price of the underlying
common stock. As the market price of the underlying common stock declines, the
convertible security tends to trade increasingly on a yield basis, and thus
may not decline in price to the same extent as the underlying common stock.
Convertible securities rank senior to common stocks in an issuer's capital
structure and consequently entail less risk than the issuer's common stock. In
evaluating a convertible security, the investment adviser will give primary
emphasis to the attractiveness of the underlying common stock. The convertible
securities in which certain of the Underlying Funds invest are not subject to
any minimum rating criteria. Convertible debt securities are equity
investments for purposes of each Underlying Fund's investment policies.
 
PREFERRED STOCK, WARRANTS AND RIGHTS
 
  The Underlying Funds may invest in preferred stock, warrants and rights.
Preferred stocks are securities that represent an ownership interest providing
the holder with claims on the issuer's earnings and assets before common stock
owners but after bond owners. Unlike debt securities, the obligations of an
issuer of preferred stock, including dividend and other payment obligations,
may not typically be accelerated by the holders of such preferred stock on the
occurrence of an event of default (such as a covenant default or filing of a
bankruptcy petition) or other non-compliance by the issuer with the terms of
the preferred stock.
 
  Warrants and other rights are options to buy a stated number of shares of
common stock at a specified price during the life of the warrant. The holders
of warrants and rights have no voting rights, receive no dividends and have no
rights with respect to the assets of the issuer.
 
                                      A-1
<PAGE>
 
REAL ESTATE INVESTMENT TRUSTS ("REITS")
 
  The Real Estate Securities Fund expects to invest a substantial portion of
its total assets in REITs, which are pooled investment vehicles that invest
primarily in either real estate or real estate related loans. In addition, the
other Underlying Equity Funds may invest in REITs from time to time. REITs are
dependent upon the ability of the REITs' managers, and are subject to heavy
cash flow dependency, default by borrowers and the qualification of the REITs
under applicable regulatory requirements for favorable federal income tax
treatment. REITs are also subject to risks generally associated with
investments in real estate including possible declines in the value of real
estate, general and local economic conditions, environmental problems and
changes in interest rates. To the extent that assets underlying a REIT are
concentrated geographically, by property type or in certain other respects,
these risks may be heightened. Each Underlying Fund will indirectly bear its
proportionate share of any expenses, including management fees, paid by a REIT
in which it invests.
 
FOREIGN INVESTMENTS
 
  Foreign Securities. Certain of the Underlying Funds may invest in foreign
securities in accordance with their investment objectives and policies.
Investing in the securities of foreign issuers involves risks that are not
typically associated with investing in securities of domestic issuers quoted
in U.S. dollars. Such investments may be affected by changes in currency
rates, changes in foreign or U.S. laws or restrictions applicable to such
investments and in exchange control regulations (e.g., currency blockage). A
decline in the exchange rate of the currency (i.e., weakening of the currency
against the U.S. dollar) in which a portfolio security is quoted or
denominated relative to the U.S. dollar would reduce the value of the
portfolio security. The expected introduction of a single currency, the euro,
on January 1, 1999 for participating European nations in the Economic and
Monetary Union ("EU") presents unique uncertainties, including whether the
payment and operational systems of banks and other financial institutions will
be ready by the scheduled launch date; the creation of suitable clearing and
settlement payment systems for the new currency; the legal treatment of
certain outstanding financial contracts after January 1, 1999 that refer to
existing currencies rather than the euro; the establishment and maintenance of
exchange rates for currencies being converted into the euro and the euro; the
fluctuation of the euro relative to non-euro currencies during the transition
period from January 1, 1999 to December 31, 2000 and beyond; whether the
interest rate, tax and labor regimes of European countries participating in
the euro will converge over time; and whether the conversion of the currencies
of other EU countries such as the United Kingdom, Denmark and Greece into the
euro and the admission of other non-EU countries such as Poland, Latvia and
Lithuania as members of the EU may have an impact on the euro. These or other
factors, including political and economic risks, could cause market
disruptions before or after the introduction of the euro, and could adversely
affect the value of securities and foreign currencies held by the Underlying
Funds. Commissions on transactions in foreign securities may be higher than
those for similar transactions on domestic stock markets. In addition,
clearance and settlement procedures may be different in foreign countries and,
in certain markets, such procedures have been unable to keep pace with the
volume of securities transactions, thus making it difficult to conduct such
transactions.
 
  Foreign issuers are not generally subject to uniform accounting, auditing
and financial reporting standards comparable to those applicable to U.S.
issuers. There may be less publicly available information about a foreign
issuer than about a U.S. issuer. In addition, there is generally less
government regulation of foreign markets, companies and securities dealers
than in the United States. Foreign securities markets may have substantially
less volume than U.S. securities markets and securities of many foreign
issuers are less liquid and more volatile than securities of comparable
domestic issuers. Furthermore, with respect to certain foreign countries,
there is a possibility of nationalization, expropriation or confiscatory
taxation, imposition of withholding or other taxes on dividend or interest
payments (or, in some cases, capital gains), limitations on the removal of
funds or other
 
                                      A-2
<PAGE>
 
assets of the Underlying Funds, political or social instability or diplomatic
developments which could affect investments in those countries.
 
  Investments in ADRs, EDRs and GDRs. Investments in foreign securities may
take the form of sponsored and unsponsored American Depository Receipts
("ADRs"), Global Depository Receipts ("GDRs"), European Depository Receipts
("EDRs") or other similar instruments representing securities of foreign
issuers (together, "Depository Receipts"). ADRs represent the right to receive
securities of foreign issuers deposited in a domestic bank or a correspondent
bank. Prices of ADRs are quoted in U.S. dollars, and ADRs are traded in the
United States on exchanges or over-the-counter and are sponsored and issued by
domestic banks. EDRs and GDRs are receipts evidencing an arrangement with a
non-U.S. bank. EDRs and GDRs are not necessarily quoted in the same currency
as the underlying security. To the extent a Fund acquires Depository Receipts
through banks which do not have a contractual relationship with the foreign
issuer of the security underlying the Depository Receipts to issue and service
such Depository Receipts (unsponsored Depository Receipts), there may be an
increased possibility that the Underlying Fund would not become aware of and
be able to respond to corporate actions, such as stock splits or rights
offerings involving the foreign issuer, in a timely manner. In addition, the
lack of information may result in inefficiencies in the valuation of such
instruments. Investment in Depository Receipts does not eliminate all the
risks inherent in investing in securities of non-U.S. issuers. The market
value of Depository Receipts is dependent upon the market value of the
underlying securities and fluctuations in the relative value of the currencies
in which the Depository Receipts and the underlying securities are quoted.
However, by investing in Depository Receipts, such as ADRs, that are quoted in
U.S. dollars, the Underlying Funds may avoid currency risks during the
settlement period for purchases and sales.
 
  Foreign Currency Transactions. Because investment in foreign issuers will
usually involve currencies of foreign countries, and because certain
Underlying Funds may have currency exposure independent of their securities
positions, the value of the assets of the Underlying Fund as measured in U.S.
dollars will be affected by changes in foreign currency exchange rates. The
Underlying Fund may, to the extent it invests in foreign securities, purchase
or sell foreign currencies on a spot basis and may also purchase or sell
forward foreign currency exchange contracts for hedging purposes and to seek
to protect against anticipated changes in future foreign currency exchange
rates. In addition, the Core Fixed Income, Global Income, High Yield, CORE
International Equity, International Equity, Japanese Equity, International
Small Cap, Emerging Markets Equity and Asia Growth Funds may enter into such
contracts to seek to increase total return when the Underlying Fund's
investment adviser anticipates that the foreign currency will appreciate or
depreciate in value, but securities denominated or quoted in that currency do
not present attractive investment opportunities and are not held in the
Underlying Fund's portfolio. When entered into to seek to enhance return,
forward foreign currency exchange contracts are considered speculative.
Certain Underlying Funds may also engage in cross-hedging by using forward
contracts in a currency different from that in which the hedged security is
denominated or quoted if the Underlying Fund's investment adviser determines
that there is a pattern of correlation between the two currencies.
 
  An Underlying Fund will incur costs in connection with conversions between
various currencies. An Underlying Fund may hold foreign currency received in
connection with investments in foreign securities when, in the judgment of its
investment adviser, it would be beneficial to convert such currency into U.S.
dollars at a later date, based on anticipated changes in the relevant exchange
rates.
 
  Currency exchange rates may fluctuate significantly over short periods of
time causing, along with other factors, an Underlying Fund's net asset value
to fluctuate. Currency exchange rates generally are determined by the forces
of supply and demand in the foreign exchange markets and the relative merits
of investments in different countries, actual or anticipated changes in
interest rates and other complex factors, as seen from an
 
                                      A-3
<PAGE>
 
international perspective. Currency exchange rates also can be affected
unpredictably by the intervention of U.S. or foreign governments or central
banks or the failure to intervene or by currency controls or political
developments in the U.S. or abroad.
 
  Certain of the Underlying Funds may enter into currency swaps, which involve
the exchange by the Underlying Fund with another party for their respective
rights to make or receive payments in specified currencies. Currency swaps
usually involve the delivery of a gross payment stream in one designated
currency in exchange for the gross payment stream in another designated
currency. Therefore, the entire payment stream under a currency swap is
subject to the risk that the other party to the swap will default on its
contractual delivery obligations.
 
  The market in forward foreign currency exchange contracts, currency swaps
and other privately negotiated currency instruments offers less protection
against defaults by the other party to such instruments than is available for
currency instruments traded on an exchange. Such contracts are subject to the
risk that the counterparty to the contract will default on its obligations.
Since these contracts are not guaranteed by an exchange or clearinghouse, a
default on the contract would deprive an Underlying Fund of unrealized profits
or the benefits of a currency hedge or force the Underlying Fund to cover its
purchase or sale commitments, if any, at the current market price.
 
FIXED-INCOME SECURITIES
 
  U.S. Government Securities. The Underlying Funds may invest in U.S.
Government securities. Generally, these securities include U.S. Treasury
obligations and obligations issued or guaranteed by U.S. Government agencies,
instrumentalities or sponsored enterprises. U.S. Government securities also
include Treasury receipts and other stripped U.S. Government securities, where
the interest and principal components of stripped U.S. Government securities
are traded independently.
 
  Foreign Government Securities. The Core Fixed Income, Global Income, High
Yield, CORE International Equity, International Equity, Japanese Equity,
International Small Cap, Emerging Markets Equity and Asia Growth Funds may
invest in debt obligations of foreign governments and governmental agencies,
including those of Emerging Countries. Investment in sovereign debt
obligations involves special risks not present in debt obligations of
corporate issuers. The issuer of the debt or the governmental authorities that
control the repayment of the debt may be unable or unwilling to repay
principal or interest when due in accordance with the terms of such debt, and
the Underlying Fund may have limited recourse in the event of a default.
Periods of economic uncertainty may result in the volatility of market prices
of sovereign debt, and in turn the Underlying Fund's NAV, to a greater extent
than the volatility inherent in debt obligations of U.S. issuers. A sovereign
debtor's willingness or ability to repay principal and pay interest in a
timely manner may be affected by, among other factors, its cash flow
situation, the extent of its foreign currency reserves, the availability of
sufficient foreign exchange on the date a payment is due, the relative size of
the debt service burden to the economy as a whole, the sovereign debtor's
policy toward international lenders and the political constraints to which a
sovereign debtor may be subject.
 
  Mortgage-Backed Securities. The Underlying Funds (other than the four CORE
Equity Funds) may invest in mortgage-backed securities ("Mortgage-Backed
Securities"), which represent direct or indirect participations in, or are
collateralized by and payable from, mortgage loans secured by real property.
Therefore, Mortgage-Backed Securities are often subject to more rapid
repayment than their stated maturity date would indicate as a result of
principal prepayments on the underlying loans. This can result in
significantly greater price and yield volatility than is the case with
traditional fixed-income securities. During periods of declining interest
rates, prepayments can be expected to accelerate, and thus impair the
Underlying Fund's ability to reinvest the returns
 
                                      A-4
<PAGE>
 
of principal at comparable yields. Conversely, in a rising interest rate
environment, a declining prepayment rate will extend the average life of many
Mortgage-Backed Securities and prevent the Underlying Fund from taking
advantage of such higher yields.
 
  Adjustable Rate Mortgage-Backed Securities ("ARMS"). ARMS allow the
Underlying Fund to participate in increases in interest rates through periodic
increases in the securities' coupon rates. During periods of declining
interest rates, coupon rates may readjust downward resulting in lower yields
to the Underlying Fund. Therefore, the value of an ARM is unlikely to rise
during periods of declining interest rates to the same extent as fixed-rate
securities. Interest rate declines may result in accelerated prepayment of
mortgages with the result that proceeds from prepayments will be reinvested at
lower interest rates. During periods of rising interest rates, changes in the
coupon rate will lag behind changes in the market rate. ARMs are also
typically subject to maximum increases and decreases in the interest rate
adjustment which can be made on any one adjustment date, in any one year, or
during the life of the security. In the event of dramatic increases or
decreases in prevailing market interest rates, the value of the Underlying
Fund's investments in ARMs may fluctuate more substantially since these limits
may prevent the security from fully adjusting its interest rate to the
prevailing market rates.
 
  The Underlying Funds may invest in Mortgage-Backed Securities issued or
sponsored by both government and non-governmental entities. Privately issued
Mortgage-Backed Securities are generally backed by pools of conventional
(i.e., non-government guaranteed or insured) mortgage loans. In order to
receive a high quality rating from the rating organizations (e.g., S&P or
Moody's), privately issued Mortgaged-Backed Securities normally are structured
with one or more types of "credit enhancement."
 
  The Underlying Funds may also invest in multiple class securities, including
collateralized mortgage obligations ("CMOs") and Real Estate Mortgage
Investment Conduit ("REMIC") pass-through or participation certificates. CMOs
provide an investor with a specified interest in the cash flow from a pool of
underlying mortgages or of other Mortgage-Backed Securities. CMOs are issued
in multiple classes, each with a specified fixed or floating interest rate and
a final scheduled distribution date. In most cases, payments of principal are
applied to the CMO classes in the order of their respective stated maturities,
so that no principal payments will be made on a CMO class until all other
classes having an earlier stated maturity date are paid in full. A REMIC is a
CMO that qualifies for special tax treatment under the Code, and invests in
certain mortgages principally secured by interests in real property and other
permitted investments.
 
  The Underlying Fixed-Income Funds may also invest in stripped Mortgage-
Backed Securities ("SMBS") (including interest only and principal only
securities), which are derivative multiple class Mortgage-Backed Securities.
SMBS are usually structured with two different classes: one that receives 100%
of the interest payments and the other that receives 100% of the principal
payments from a pool of mortgage loans. If the underlying mortgage loans
experience different than anticipated prepayments of principal, a Fund may
fail to fully recoup its initial investment in these securities. The market
value of the class consisting entirely of principal payments generally is
unusually volatile in response to changes in interest rates. The yields on a
class of SMBS that receives all or most of the interest from mortgage loans
are generally higher than prevailing market yields on other Mortgage-Backed
Securities because their cash flow patterns are more volatile and there is a
greater risk that the initial investment will not be fully recouped.
 
  Because derivative Mortgage-Backed Securities (such as principal-only (POs),
interest-only (IOs) or inverse floating rate securities) are more exposed to
mortgage prepayments, they generally involve a greater amount of risk. Small
changes in prepayments can significantly impact the cash flow and the market
value of these securities. The risk of faster than anticipated prepayments
generally adversely affects IOs, super floaters and premium priced Mortgage-
Backed Securities. The risk of slower than anticipated prepayments generally
adversely affects POs, floating-rate securities subject to interest rate caps,
support tranches and discount priced
 
                                      A-5
<PAGE>
 
Mortgage-Backed Securities. In addition, particular derivative securities may
be leveraged such that their exposure (i.e., price sensitivity) to interest
rate and/or prepayment risk is magnified.
 
  Asset-Backed Securities. The Underlying Funds (other than the four CORE
Equity Funds, the Adjustable Rate Government Fund and the Short Duration
Government Fund) may also invest in asset-backed securities ("Asset-Backed
Securities"). The principal and interest payments on Asset-Backed Securities
are collateralized by pools of assets such as auto loans, credit card
receivables, leases, installment contracts and personal property. Such asset
pools are securitized through the use of special purpose trusts or
corporations. Principal and interest payments may be credit enhanced by a
letter of credit, a pool insurance policy or a senior/subordinated structure.
 
  Corporate and Bank Obligations. The Underlying Funds may invest in
obligations issued or guaranteed by U.S. or foreign corporations and banks.
Banks are subject to extensive but different governmental regulations which
may limit both the amount and types of loans which may be made and interest
rates which may be charged. In addition, the profitability of the banking
industry is largely dependent upon the availability and cost of funds for the
purpose of financing lending operations under prevailing money market
conditions. General economic conditions as well as exposure to credit losses
arising from possible financial difficulties of borrowers play an important
part in the operation of this industry.
 
  Structured Securities. The Underlying Funds may invest in structured
securities. The value of the principal of and/or interest on such securities
is determined by reference to changes in the value of specific currencies,
interest rates, commodities, indices or other financial indicators (the
"Reference") or the relative change in two or more References. The interest
rate or the principal amount payable upon maturity or redemption may be
increased or decreased depending upon changes in the applicable Reference. The
terms of the structured securities may provide that in certain circumstances
no principal is due at maturity and, therefore, result in the loss of the
Underlying Fund's investment. Structured securities may be positively or
negatively indexed, so that appreciation of the Reference may produce an
increase or decrease in the interest rate or value of the security at
maturity. In addition, changes in the interest rates or the value of the
security at maturity may be a multiple of changes in the value of the
Reference. Consequently, structured securities may entail a greater degree of
market risk than other types of fixed-income securities. Structured securities
may also be more volatile, less liquid and more difficult to accurately price
than less complex securities.
 
  Municipal Securities. The Core Fixed Income and High Yield Funds may make
limited investments in instruments issued by state and local governmental
issuers. These securities may include private activity bonds, municipal
leases, certificates of participation and "auction rate" securities.
 
  Zero Coupon, Deferred Interest, Pay-In-Kind and Capital Appreciation
Bonds. Each Underlying Fund may invest in zero coupon, deferred interest and
capital appreciation bonds. These are securities issued at a discount from
their face value because interest payments are typically postponed until
maturity. These securities also may take the form of debt securities that have
been stripped of their interest payments. Each Underlying Fund may also invest
in pay-in-kind securities which are securities that have interest payable by
the delivery of additional securities. The market prices of zero coupon,
deferred interest, pay-in-kind and capital appreciation bonds generally are
more volatile than the market prices of interest-bearing securities and are
likely to respond to a greater degree to changes in interest rates than
interest-bearing securities having similar maturities and credit quality.
 
  Rating Criteria. The rating requirements for each of the Underlying Fixed-
Income Funds are stated above. Except as noted below, the Underlying Equity
Funds (other than the four CORE Equity Funds, which only invest in debt
instruments that are cash equivalents) may invest in debt securities rated at
least investment grade at the
 
                                      A-6
<PAGE>
 
time of investment. Investment grade debt securities are securities rated BBB
or higher by Standard & Poor's or Baa or higher by Moody's. The Growth and
Income, Capital Growth, Small Cap Value, International Equity, Japanese
Equity, International Small Cap, Emerging Markets Equity, Asia Growth and Real
Estate Securities Funds may invest up to 10%, 10%, 35%, 35%, 35%, 35%, 35%,
35% and 20%, respectively, of their total assets in debt securities which are
rated in the lowest rating categories by Standard & Poor's or Moody's (i.e.,
BB or lower by Standard & Poor's or Ba or lower by Moody's), including
securities rated D by Moody's or Standard & Poor's. The Mid Cap Equity Fund
may invest up to 10% of its total assets in below investment grade debt
securities rated B or higher by Standard & Poor's or Moody's. Fixed-income
securities rated BB or Ba or below (or comparable unrated securities) are
commonly referred to as "junk bonds," are considered predominately speculative
and may be questionable as to principal and interest payments as described
further below under "Risks of Investing in Non-Investment Grade Fixed-Income
Securities." See Appendix A to the Additional Statement for a description of
the corporate bond ratings assigned by Standard & Poor's and Moody's.
 
OPTIONS ON SECURITIES AND SECURITIES INDICES
 
  An Underlying Fund (other than the CORE U.S. Equity and CORE Large Cap
Growth Funds) may write (sell) covered call and put options and purchase call
and put options on any securities in which it may invest or on any securities
index composed of securities in which it may invest. The writing and purchase
of options is a highly specialized activity which involves investment
techniques and risks different from those associated with ordinary portfolio
securities transactions. The use of options to seek to increase total return
involves the risk of loss if the Underlying Fund's investment adviser is
incorrect in its expectation of fluctuations in securities prices or interest
rates. The successful use of options for hedging purposes also depends in part
on the ability of the investment adviser to manage future price fluctuations
and the degree of correlation between the options and securities markets. If
the investment adviser is incorrect in its expectation of changes in
securities prices or determination of the correlation between the securities
indices on which options are written and purchased and the securities in the
Underlying Fund's investment portfolio, the investment performance of the
Underlying Fund will be less favorable than it would have been in the absence
of such options transactions. The writing of options could significantly
increase the Underlying Fund's portfolio turnover rate and, therefore,
associated brokerage commissions or spreads.
 
OPTIONS ON FOREIGN CURRENCIES
 
  An Underlying Fund may, to the extent it invests in foreign securities,
purchase and sell (write) call and put options on foreign currencies for the
purpose of protecting against declines in the U.S. dollar value of foreign
portfolio securities and anticipated dividends on such securities and against
increases in the U.S. dollar cost of foreign securities to be acquired. In
addition, certain Underlying Funds may use options on currency to cross-hedge,
which involves writing or purchasing options on one currency to hedge against
changes in exchange rates for a different currency, if there is a pattern of
correlation between the two currencies. As with other kinds of options
transactions, however, the writing of an option on a foreign currency will
constitute only a partial hedge, up to the amount of the premium received. If
an option that the Underlying Fund has written is exercised, the Underlying
Fund could be required to purchase or sell foreign currencies at
disadvantageous exchange rates, thereby incurring losses. The purchase of an
option on foreign currency may constitute an effective hedge against exchange
rate fluctuations; however, in the event of exchange rate movements adverse to
the Underlying Fund's position, the Underlying Fund may forfeit the entire
amount of the premium plus related transaction costs. In addition to
purchasing call and put options for hedging purposes, the Core Fixed Income,
Global Income, High Yield, CORE International Equity, International Equity,
Japanese Equity, International Small Cap, Emerging Markets Equity and Asia
Growth Funds may purchase call or put options on currency to seek to increase
total return when the Underlying Fund's investment adviser anticipates that
the currency will appreciate or depreciate
 
                                      A-7
<PAGE>
 
in value, but the securities quoted or denominated in that currency do not
present attractive investment opportunities and are not held in the Underlying
Fund's portfolio. When purchased or sold to seek to increase total return,
options on currencies are considered speculative. Options on foreign
currencies written or purchased by the Underlying Funds are traded on U.S. and
foreign exchanges or over-the-counter.
 
FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS
 
  To seek to increase total return or to hedge against changes in interest
rates, securities prices or currency exchange rates, an Underlying Fund may
purchase and sell various kinds of futures contracts, and purchase and write
call and put options on any of such futures contracts. Each Underlying Fund
may also enter into closing purchase and sale transactions with respect to any
such contracts and options.
 
  The futures contracts may be based on various securities (such as U.S.
Government securities), foreign currencies, securities indices and other
financial instruments and indices, whether domestic or foreign. An Underlying
Fund will engage in futures and related options transactions for bona fide
hedging purposes as defined in regulations of the Commodity Futures Trading
Commission or to seek to increase total return to the extent permitted by such
regulations. The Underlying Fund may not purchase or sell futures contracts or
purchase or sell related options to seek to increase total return, except for
closing purchase or sale transactions, if immediately thereafter the sum of
the amount of initial margin deposits and premiums paid on the Underlying
Fund's outstanding positions in futures and related options entered into for
the purpose of seeking to increase total return would exceed 5% of the market
value of the Underlying Fund's net assets. These transactions involve
brokerage costs, require margin deposits and, in the case of contracts and
options obligating the Underlying Fund to purchase securities or currencies,
require the Underlying Fund to segregate and maintain cash or liquid assets
with a value equal to the amount of the Underlying Fund's obligations or to
otherwise cover the obligations in a manner permitted by the SEC.
 
  While transactions in futures contracts and options on futures may reduce
certain risks, such transactions themselves entail certain other risks. See
"Investment Objectives and Policies--Futures Contracts and Options on Future
Contracts" in the Additional Statement. Thus, while the Underlying Fund may
benefit from the use of futures and options on futures, unanticipated changes
in interest rates, securities prices or currency exchange rates may result in
poorer overall performance than if the Underlying Fund had not entered into
any futures contracts or options transactions. Because perfect correlation
between a futures position and portfolio position that is intended to be
protected is impossible to achieve, the desired protection may not be obtained
and the Underlying Fund may be exposed to risk of loss. The loss incurred by
the Underlying Fund in entering into futures contracts and in writing call
options on futures is potentially unlimited and may exceed the amount of the
premium received. Futures markets are highly volatile and the use of futures
may increase the volatility of the Underlying Fund's NAV. The profitability of
the Underlying Fund's trading in futures to seek to increase total return
depends upon the ability of the investment adviser to analyze correctly the
futures markets. In addition, because of the low margin deposits normally
required in futures trading, a relatively small price movement in a futures
contract may result in substantial losses to the Underlying Fund. Further,
futures contracts and options on futures may be illiquid, and exchanges may
limit fluctuations in futures contract prices during a single day. The
Underlying Funds may engage in futures transactions on both U.S. and foreign
exchanges. Foreign exchanges may not provide the same protections as U.S.
exchanges.
 
STANDARD AND POOR'S DEPOSITORY RECEIPTS
 
  Each Underlying Equity Fund may, consistent with its objectives, purchase
Standard & Poor's Depository Receipts ("SPDRs"). SPDRs are American Stock
Exchange-traded securities that represent ownership in the
 
                                      A-8
<PAGE>
 
SPDR Trust, a trust which has been established to accumulate and hold a
portfolio of common stocks that is intended to track the price performance and
dividend yield of the S&P 500. This trust is sponsored by a subsidiary of the
American Stock Exchange. SPDRs may be used for several reasons, including but
not limited to: facilitating the handling of cash flows or trading, or
reducing transaction costs. The use of SPDRs would introduce additional risks
to the portfolio as the price movement of the instrument does not perfectly
correlate with the price action of the underlying index.
 
EQUITY SWAPS
 
  Each Underlying Equity Fund may invest up to 10% of its total assets in
equity swaps. Equity swaps allow the parties to a swap agreement to exchange
the dividend income or other components of return on an equity investment
(e.g., a group of equity securities or an index) for a component of return on
another non-equity or equity investment. An equity swap may be used by a Fund
to invest in a market without owning or taking physical custody of securities
in circumstances in which direct investment may be restricted for legal
reasons or is otherwise impractical. Equity swaps are derivatives and their
value can be very volatile. To the extent that its Investment Adviser does not
accurately analyze and predict the potential relative fluctuation of the
components swapped with another party, a Fund may suffer a loss. The value of
some components of an equity swap (such as the dividends on a common stock)
may also be sensitive to changes in interest rates. Furthermore, during the
period a swap is outstanding, a Fund may suffer a loss if the counterparty
defaults. In connection with its investments in equity swaps, a Fund will
either segregate cash or liquid assets or otherwise cover its obligations in a
manner required by the SEC.
 
WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS
 
  The Underlying Funds may purchase when-issued securities. When-issued
transactions arise when securities are purchased by the Underlying Fund with
payment and delivery taking place in the future in order to secure what is
considered to be an advantageous price and yield to the Underlying Fund at the
time of entering into the transaction. Each Underlying Fund may also purchase
or sell securities on a forward commitment basis; that is, make contracts to
purchase or sell securities for a fixed price at a future date beyond the
customary three-day settlement period. The purchase of securities on a when-
issued or forward commitment basis involves a risk of loss if the value of the
security to be purchased declines prior to the settlement date. Conversely,
securities sold on a forward commitment basis involve the risk that the value
of the securities to be sold may increase prior to the settlement date.
Although the Underlying Fund would generally purchase securities on a when-
issued or forward commitment basis with the intention of acquiring securities
for its portfolio, the Underlying Fund may dispose of when-issued securities
or forward commitments prior to settlement if its investment adviser deems it
appropriate to do so. The Underlying Fund will segregate cash or liquid assets
in an amount sufficient to meet the purchase price until three days prior to
the settlement date. Alternatively, each Underlying Fund may enter into
offsetting contracts for the forward sale of other securities that it owns.
 
ILLIQUID AND RESTRICTED SECURITIES
 
  No Underlying Fund will invest more than 15% (10% in the case of the
Financial Square Prime Obligations Fund) of its net assets in illiquid
investments, which include securities (both foreign and domestic) that are not
readily marketable, swap transactions, certain SMBS, repurchase agreements
maturing in more than seven days, time deposits with a notice or demand period
of more than seven days, certain over-the-counter-options and certain
restricted securities, unless it is determined, based upon the continuing
review of the trading markets for a specific restricted security, that such
restricted security is eligible for resale under Rule 144A under the
 
                                      A-9
<PAGE>
 
Securities Act of 1933 and, therefore, is liquid. Investing in restricted
securities eligible for resale pursuant to Rule 144A may decrease the
liquidity of an Underlying Fund's portfolio to the extent that qualified
institutional buyers become for a time uninterested in purchasing these
restricted securities. The purchase price and subsequent valuation of
restricted and illiquid securities normally reflect a discount, which may be
significant, from the market price of comparable securities for which a market
exists.
 
REPURCHASE AGREEMENTS
 
  The Underlying Funds may enter into repurchase agreements with dealers in
U.S. Government securities and member banks of the Federal Reserve System
which furnish collateral at least equal in value or market price to the amount
of their repurchase obligation. The Core Fixed Income, Global Income, High
Yield, CORE International Equity, International Equity, Japanese Equity,
International Small Cap, Emerging Markets Equity and Asia Growth Funds may
also enter into repurchase agreements involving certain foreign government
securities. If the other party or "seller" defaults, the Underlying Fund might
suffer a loss to the extent that the proceeds from the sale of the underlying
securities and other collateral are less than the repurchase price. In
addition, in the event of bankruptcy of the seller or failure of the seller to
repurchase the securities as agreed, the Underlying Fund could suffer losses,
including loss of interest on or principal of the security and costs
associated with delay and enforcement of the repurchase agreement. Each
Underlying Fund, together with other registered investment companies having
management agreements with GSAM or its affiliates, may transfer uninvested
cash balances into a single joint account, the daily aggregate balance of
which will be invested in one or more repurchase agreements.
 
LENDING OF PORTFOLIO SECURITIES
 
  The Underlying Funds may also seek to increase their income by lending
portfolio securities. Under present regulatory policies, such loans may be
made to institutions, such as certain broker-dealers, and are required to be
secured continuously by collateral in cash, cash equivalents, or U.S.
Government securities maintained on a current basis in an amount at least
equal to the market value of the securities loaned. Cash collateral may be
invested in cash equivalents. The value of the securities loaned may not
exceed 33 1/3% of the value of the total assets of an Underlying Fund
(including the loan collateral). A loss or delay in the recovery of securities
could result if the institution which borrows securities breaches its
agreement with the Underlying Fund.
 
SHORT SALES AGAINST-THE-BOX
 
  Certain Underlying Funds may make short sales of securities or maintain a
short position, provided that at all times when a short position is open the
Underlying Fund owns an equal amount of such securities or securities
convertible into or exchangeable, without payment of any further
consideration, for an equal amount of the securities of the same issuer as the
securities sold short (a short sale against-the-box). Not more than 25% of the
Underlying Fund's net assets (determined at the time of the short sale) may be
subject to such short sales.
 
MORTGAGE DOLLAR ROLLS
 
  The Underlying Fixed-Income Funds (except the High Yield Fund) and the Real
Estate Securities Fund may enter into mortgage "dollar rolls" in which the
Underlying Fund sells securities for delivery in the current month and
simultaneously contracts with the same counterparty to repurchase
substantially similar but not identical securities on a specified future date.
During the roll period, the Underlying Fund loses the right to receive
principal and interest paid on the securities sold. However, the Underlying
Fund would benefit to the extent of any difference between the price received
for the securities sold and the lower forward price for the future purchase or
fee income plus the interest earned on the cash proceeds of the securities
sold until the settlement
 
                                     A-10
<PAGE>
 
date for the forward purchase. Unless such benefits exceed the income, capital
appreciation and gain or loss due to mortgage prepayments that would have been
realized on the securities sold as part of the mortgage dollar roll, the use
of this technique will diminish the investment performance of the Underlying
Fund.
 
TEMPORARY INVESTMENTS
 
  Each Underlying Fund may, for temporary defensive purposes, invest 100% of
its total assets (except that the CORE Equity Funds and Emerging Markets
Equity Fund may only hold up to 35% of their respective total assets) in high
quality fixed income securities. When assets are invested in such instruments,
an Underlying Fund may not be achieving its investment objective.
 
PORTFOLIO TURNOVER
 
  The turnover rates of the Underlying Funds have ranged from 41% to 396%
during their most recent fiscal years. There can be no assurance that the
turnover rates of these Underlying Funds will remain within this range during
subsequent fiscal years. Higher turnover rates may result in higher brokerage
costs and higher expenses being incurred by the Underlying Funds. In addition,
higher turnover rates may result in higher taxable realized gains being
incurred by shareholders.
 
MISCELLANEOUS TECHNIQUES
 
  In addition to the techniques and investments described above, each
Underlying Fund may engage in the following techniques and investments: (i)
mortgage swaps, credit swaps, index swaps and interest rate swaps, caps,
floors and collars (Underlying Fixed-Income Funds and Real Estate Securities
Fund only), (ii) yield curve options and inverse floating rate securities
(Underlying Fixed-Income Funds and Real Estate Securities Fund only), (iii)
loan participations (High Yield Fund only), (iv) other investment companies,
(v) unseasoned companies, (vi) custodial receipts, and (vii) reverse
repurchase agreements for investment purposes (Underlying Fixed-Income Funds
only).
 
  In addition, each Underlying Fund may borrow up to 33 1/3% of its total
assets from banks for temporary or emergency purposes. An Underlying Fund may
not make additional investments if borrowings (excluding covered mortgage
dollar rolls) exceed 5% of its total assets.
 
                      (2) RELATED ADDITIONAL RISK FACTORS
 
RISKS OF INVESTING IN SMALL CAPITALIZATION COMPANIES AND REITS
 
  Investing in the securities of small capitalization companies and REITs
involves greater risk and the possibility of greater portfolio price
volatility. Among the reasons for the greater price volatility of these
securities are the less certain growth prospects of smaller firms and the
lower degree of liquidity in the markets for such securities. Small
capitalization companies and REITs may have limited financial resources, may
trade less frequently and in a limited volume and may be subject to more
abrupt or erratic price movements than larger capitalization companies. An
Underlying Fund may invest in securities of small capitalization companies and
REITs that have experienced financial difficulties or are in an early
development stage. Other risks associated with REITs are discussed in this
Appendix A under "Real Estate Investment Trusts ('REITs')."
 
SPECIAL RISKS OF INVESTMENTS IN THE ASIAN AND OTHER EMERGING MARKETS
 
  Investing in the securities of issuers in Emerging Countries involves risks
in addition to those discussed in this Appendix A under "Foreign Investments."
The International Equity, International Small Cap, Emerging Markets Equity and
Asia Growth Funds may each invest without limit in the securities of issuers
in Emerging Countries. Up to 35% of the total assets of the Emerging Markets
Equity Fund may be invested in securities of
 
                                     A-11
<PAGE>
 
issuers in any one Emerging Country. The Growth and Income, Small Cap Value,
Mid Cap Equity, High Yield and CORE International Equity Funds may each invest
up to 25%, and the Core Fixed Income, Global Income and Capital Growth Funds
may each invest up to 10%, of their respective total assets in securities of
issuers in Emerging Countries.
 
  Many Emerging Countries are subject to a greater degree of economic,
political and social instability than is the case in Western Europe, the
United States, Canada, Australia, New Zealand and Japan. The governments of
some Emerging Countries are authoritarian in nature or have been installed or
removed as a result of military coups, while governments in other Emerging
Countries have periodically used force to suppress civil dissent. Disparities
of wealth, the pace and success of democratization, and ethnic, religious and
racial disaffection, among other factors, have also led to social unrest,
violence and/or labor unrest in some Asian and other Emerging Countries.
Investing in Emerging Countries involves the risk of loss due to
expropriation, nationalization, confiscation of assets and property or the
imposition of restrictions on foreign investments and on repatriation of
capital invested. Many Emerging Countries have experienced currency
devaluations and substantial and, in some cases, extremely high rates of
inflation, which have a negative effect on the economies and securities
markets of such Emerging Countries. Economies in Emerging Countries generally
are dependent heavily upon commodity prices and international trade and,
accordingly, have been and may continue to be affected adversely by the
economies of their trading partners, trade barriers, exchange controls,
managed adjustments in relative currency values and other protectionist
measures imposed or negotiated by the countries with which they trade.
 
  The securities markets of Emerging Countries are marked by a high
concentration of market capitalization and trading volume in a small number of
issuers representing a limited number of industries, as well as a high
concentration of ownership of such securities by a limited number of
investors. The Underlying Fund's purchase and sale of portfolio securities in
certain Emerging Countries may be constrained by limitations as to daily
changes in the prices of listed securities, periodic trading or settlement
volume and/or limitations on aggregate holdings of foreign investors. In
addition, settlement procedures in Emerging Countries are frequently less
developed and reliable than those in the United States and may involve the
Underlying Fund's delivery of securities before receipt of payment for their
sale. Significant delays are common in certain markets in registering the
transfer of securities. Settlement or registration problems may make it more
difficult for the Underlying Fund to value its portfolio securities and could
cause the Underlying Fund to miss attractive investment opportunities, to have
a portion of its assets uninvested or to incur losses due to the failure of a
counterparty to pay for securities the Underlying Fund has delivered or the
Underlying Fund's inability to complete its contractual obligations.
 
RISKS OF INVESTING IN FIXED-INCOME SECURITIES
 
  The Financial Square Prime Obligations Fund attempts to maintain a stable
NAV of $1.00 per Share and values its assets using the amortized cost method
in accordance with SEC regulations. There is no assurance, however, that the
Financial Square Prime Obligations Fund will be successful in maintaining its
per share value at $1.00 on a continuous basis. The per share NAVs of the
other Underlying Funds are expected to fluctuate on a daily basis.
 
  When interest rates decline, the market value of fixed-income securities
tends to increase. Conversely, when interest rates increase, the market value
of fixed-income securities tends to decline. Volatility of a security's market
value will differ depending upon the security's duration, the issuer and the
type of instrument. Investments in fixed-income securities are subject to the
risk that the issuer could default on its obligations and an Underlying Fund
could sustain losses on such investments. A default could impact both interest
and principal payments.
 
                                     A-12
<PAGE>
 
  The Underlying Funds may invest in various types of derivative debt
securities that present more complex types of interest rate risks. These risks
include call risk and extension risk. Call risk (i.e., where the issuer
exercises its right to pay principal on an obligation earlier than scheduled)
causes cash flow to be returned earlier than expected. This typically results
when interest rates have declined and an Underlying Fund will suffer from
having to reinvest in lower yielding securities. Extension risk (i.e., where
the issuer exercises its right to pay principal on an obligation later than
scheduled) causes cash flows to be returned later than expected. This
typically results when interest rates have increased, and the Underlying Fund
may be unable to recoup all of its initial investment and will also suffer
from the inability to invest in higher yielding securities.
 
  Asset-Backed Securities present certain credit risks that are not presented
by Mortgage-Backed Securities because Asset-Backed Securities generally do not
have the benefit of a security interest in collateral that is comparable to
mortgage assets. There is the possibility that, in some cases, recoveries on
repossessed collateral may not be available to support payments on these
securities.
 
RISKS OF INVESTING IN NON-INVESTMENT GRADE FIXED-INCOME SECURITIES
 
  Non-investment grade fixed-income securities are considered predominantly
speculative by traditional investment standards. In some cases, these
obligations may be highly speculative and have poor prospects for reaching
investment grade standing. Non-investment grade fixed-income securities and
unrated securities of comparable credit quality (commonly known as "junk
bonds") are subject to the increased risk of an issuer's inability to meet
principal and interest obligations. These securities, also referred to as high
yield securities, may be subject to greater price volatility due to such
factors as specific corporate developments, interest rate sensitivity,
negative perceptions of the junk bond markets generally and less secondary
market liquidity. Non-investment grade securities are generally unsecured and
are often subordinated to the rights of other creditors of the issuers of such
securities. Investment by the Underlying Fund in defaulted securities poses
additional risk of loss should nonpayment of principal and interest continue
in respect of such securities. Even if such securities are held to maturity,
recovery by the Underlying Fund of its initial investment and any anticipated
income or appreciation is uncertain.
 
RISKS OF OTHER DERIVATIVE TRANSACTIONS
 
  An Underlying Fund's transactions, if any, in options, futures, options on
futures, swaps, structured securities and currency forward contracts involve
certain risks, including a possible lack of correlation between changes in the
value of hedging instruments and the portfolio assets (if any) being hedged,
the potential illiquidity of the markets for derivative instruments, the risks
arising from margin requirements and related leverage factors associated with
such transactions. The use of these management techniques to seek to increase
total return may be regarded as a speculative practice and involves the risk
of loss if the investment adviser is incorrect in its expectation of
fluctuations in securities prices, interest rates or currency prices.
 
NON-DIVERSIFICATION
 
  The Global Income Fund is registered as a "non-diversified" Fund under the
1940 Act and is, therefore, more susceptible to adverse developments affecting
any single issuer. In addition, the Global Income Fund, and certain other
Underlying Funds, may invest more than 25% of their total assets in the
securities of corporate and governmental issuers located in a single foreign
country. Concentration of a Fund's investments in such issuers will subject
the Fund, to a greater extent than if investment was more limited, to the
risks of adverse securities markets, exchange rates and social, political or
economic events which may occur in those countries.
 
                                     A-13
<PAGE>
 
 
                                  APPENDIX B
 
 
   GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON ACCOUNT
                               INFORMATION FORM
 
  You are required by law to provide the Portfolio with your correct Taxpayer
Identification Number (TIN), regardless of whether you file tax returns.
Failure to do so may subject you to penalties. Failure to provide your correct
TIN and to sign your name in the Certification section of the Account
Information Form could result in withholding of 31% by the Portfolio for the
federal backup withholding tax on distributions, redemptions, exchanges and
other payments relating to your account.
 
  Any tax withheld may be credited against taxes owed on your federal income
tax return.
 
  If you do not have a TIN, you should apply for one immediately by contacting
your local office of the Social Security Administration or the Internal
Revenue Service (IRS). Backup withholding could also apply to payments
relating to your account prior to the Portfolio's receipt of your TIN. Special
rules apply for certain entities. For example, for an account established
under a Uniform Gifts or Transfers to Minors Act, the TIN of the minor should
be furnished.
 
  If you have been notified by the IRS that you are subject to backup
withholding because you failed to report all your interest and/or dividend
income on your tax return and you have not been notified by the IRS that such
withholding should cease, you must cross out item (2) in the Certification
section of the Account Information Form.
 
  If you are an exempt recipient, you should furnish your TIN and certify your
exemption by signing the Certification section and writing "exempt" after your
signature. Exempt recipients include: corporations, tax-exempt pension plans
and IRAs, governmental agencies, financial institutions, registered securities
and commodities dealers and others.
 
  If you are a nonresident alien or foreign entity, you must provide a
completed Form W-8 to the Portfolio in order to avoid backup withholding on
certain payments. Other payments to you may be subject to nonresident alien
withholding of up to 30%.
 
  For further information regarding backup and nonresident alien withholding,
see Sections 3406, 1441 and 1442 of the Code and consult your tax adviser.
 
                                      B-1
<PAGE>
 
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS ASSET
MANAGEMENT
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR
85 BROAD STREET
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
TRANSFER AGENT
4900 SEARS TOWER
CHICAGO, ILLINOIS 60606
 
STATE STREET BANK AND TRUST COMPANY
CUSTODIAN
1776 HERITAGE DRIVE
NORTH QUINCY, MASSACHUSETTS 02171
 
ARTHUR ANDERSEN LLP
INDEPENDENT PUBLIC ACCOUNTANTS
225 FRANKLIN STREET
BOSTON, MASSACHUSETTS 02110
 
TOLL FREE (IN U.S.) . . . . . . . . 800-621-2550
 
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS
 
ASSET ALLOCATION PORTFOLIOS
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
 
SERVICE SHARES
 
 
LOGO GOLDMAN
     SACHS
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
AAPROSVC
501425
<PAGE>
 
- --------------------------------------------------------------------------------
PROSPECTUS
January 1, 1998, as revised      GOLDMAN SACHS
September 1, 1998         ASSET ALLOCATION PORTFOLIOS
                              INSTITUTIONAL SHARES
 
  The Goldman Sachs Asset Allocation Portfolios (the "Portfolios") are
professionally-managed portfolios designed to take advantage of the benefits of
asset allocation. Each Portfolio has a separate objective, which it seeks to
achieve by investing in a number of other Goldman Sachs mutual funds (the
"Underlying Funds").
 
GOLDMAN SACHS INCOME STRATEGY PORTFOLIO
  Seeks a high level of current income with greater stability of principal
  than an investment in equity securities alone.
 
GOLDMAN SACHS GROWTH AND INCOME STRATEGY PORTFOLIO
  Seeks long-term capital appreciation and current income.
 
GOLDMAN SACHS GROWTH STRATEGY PORTFOLIO
  Seeks capital appreciation and secondarily current income.
 
GOLDMAN SACHS AGGRESSIVE GROWTH STRATEGY PORTFOLIO
  Seeks capital appreciation.
 
  Goldman Sachs Asset Management ("GSAM"), New York, New York, a separate
operating division of Goldman, Sachs & Co. ("Goldman Sachs"), serves as
investment adviser to each Portfolio. GSAM and its affiliates also provide
advisory services to the Underlying Funds. GSAM is also referred to in this
Prospectus as the "Investment Adviser." Goldman Sachs serves as the Portfolios'
distributor and transfer agent.
 
INSTITUTIONAL SHARES OF THE PORTFOLIOS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR
GUARANTEED OR ENDORSED BY, ANY BANK OR OTHER INSURED DEPOSITORY INSTITUTION AND
ARE NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL
RESERVE BOARD OR ANY OTHER GOVERNMENT AGENCY. AN INVESTMENT IN A PORTFOLIO
INVOLVES INVESTMENT RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
 
  This Prospectus provides information about Goldman Sachs Trust (the "Trust")
and the Portfolios that a prospective investor should understand before
investing. This Prospectus should be retained for future reference. A Statement
of Additional Information (the "Additional Statement"), dated January 1, 1998,
as revised September 1, 1998, containing further information about the Trust
and the Portfolios which may be of interest to investors, has been filed with
the Securities and Exchange Commission ("SEC"), is incorporated herein by
reference in its entirety, and may be obtained without charge from Goldman
Sachs by calling the telephone number, or writing to one of the addresses,
listed on the back cover of this Prospectus. The SEC maintains a Web site
(http://www.sec.gov) that contains the Additional Statement and other
information regarding the Trust.
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
Portfolio Highlights................   2
Fees and Expenses...................   6
Investment Objectives and Policies..   8
Risk Factors and Special
 Considerations.....................  10
Description of Underlying Funds.....  11
Management..........................  18
Expenses............................  21
Net Asset Value.....................  23
Performance Information.............  23
Shares of the Trust.................  24
</TABLE>
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
Taxation............................  24
Additional Information..............  25
Reports to Shareholders.............  26
Dividends...........................  26
Purchase of Institutional Shares....  26
Exchange Privilege..................  29
Redemption of Institutional Shares..  29
Appendix A.......................... A-1
Appendix B.......................... B-1
Account Application
</TABLE>
<PAGE>
 
 
                              PORTFOLIO HIGHLIGHTS
 
 
   The following is intended to highlight certain information and is
 qualified in its entirety by the more detailed information contained in
 this Prospectus.
 
  WHAT IS THE GOLDMAN SACHS TRUST?
 
   The Goldman Sachs Trust is an open-end management investment company
 that offers its shares ("Shares") in several investment portfolios
 (commonly known as mutual funds). Each Portfolio pools the monies of
 investors by selling its Shares to the public and investing these monies
 in a portfolio of securities designed to achieve that Portfolio's stated
 investment objectives.
 
  WHAT ARE THE INVESTMENT OBJECTIVES AND POLICIES OF THE PORTFOLIOS?
 
   Each Portfolio has distinct investment objectives and policies. Each
 Portfolio seeks to achieve its objectives by investing in a combination
 of Underlying Funds for which Goldman Sachs now or in the future acts as
 investment adviser or principal underwriter. Some of these Funds invest
 primarily in fixed-income or money market securities (the "Underlying
 Fixed-Income Funds"); other Funds invest primarily in equity securities
 (the "Underlying Equity Funds"). Investors may choose to invest in one or
 more of the Portfolios based on their personal investment goals, risk
 tolerances and financial circumstances. For a further description of the
 Portfolios' investment objectives and policies, see "Investment
 Objectives and Policies."
 
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
   PORTFOLIO NAMES   INVESTMENT OBJECTIVES               INVESTMENT CRITERIA
  ----------------  ------------------------ -------------------------------------------
  <S>               <C>                      <C>
  GOLDMAN SACHS     High level of current    Under normal conditions, approximately 60%
  INCOME STRATEGY   income with greater      of the Portfolio's total assets will be
  PORTFOLIO         stability of principal   allocated among Underlying Fixed-Income
                    than an investment in    Funds. Allocation to Underlying Equity
                    equity securities alone. Funds is intended to add diversification
                                             and enhance returns, but will also add some
                                             volatility.
- ----------------------------------------------------------------------------------------
  GOLDMAN SACHS     Long-term capital        Under normal conditions, approximately 60%
  GROWTH AND        appreciation and current of the Portfolio's total assets will be
  INCOME STRATEGY   income.                  allocated among Underlying Equity Funds,
  PORTFOLIO                                  which are intended to provide the capital
                                             appreciation component. Allocation to
                                             Underlying Fixed-Income Funds is intended
                                             to provide the income component.
- ----------------------------------------------------------------------------------------
  GOLDMAN SACHS     Capital appreciation and Under normal conditions, approximately 80%
  GROWTH STRATEGY   secondarily current      of the Portfolio's total assets will be
  PORTFOLIO         income.                  allocated among Underlying Equity Funds,
                                             with a blend of domestic large cap, small
                                             cap and international exposure to seek
                                             capital appreciation. Allocation to
                                             Underlying Fixed-Income Funds is to provide
                                             diversification.
- ----------------------------------------------------------------------------------------
  GOLDMAN SACHS     Capital appreciation.    Under normal conditions, substantially all
  AGGRESSIVE                                 of the Portfolio's total assets will be
  GROWTH STRATEGY                            allocated among Underlying Equity Funds,
  PORTFOLIO                                  with a greater focus on small cap and
                                             international investments.
</TABLE>
 
 
                                       2
<PAGE>
 
 
 WHAT IS GOLDMAN SACHS ASSET MANAGEMENT'S GLOBAL ASSET ALLOCATION PROCESS?
 
  The Quantitative Research Group at GSAM uses disciplined quantitative models
to determine the relative attractiveness of the world's stock, bond and
currency markets. GSAM's models use financial and economic variables to capture
fundamental relationships that it believes make sense. While GSAM's process is
rigorous and quantitative, it also incorporates clear economic reasoning behind
each recommendation.
 
  Each Portfolio starts with a "base-line" or strategic allocation among the
various asset classes. GSAM will then tactically deviate from the strategic
allocations based on forecasts provided by the models. The tactical process
seeks to add value by overweighting attractive markets and underweighting
unattractive markets. Greater deviations from the strategic allocation of a
given Portfolio result in higher risk that the tactical allocation will
underperform the strategic allocation. However, GSAM's risk control process
balances the amount any asset class can be overweighted or underweighted in
seeking to achieve higher expected returns against the amount of risk imposed
by that deviation from the strategic allocation. GSAM employs Goldman, Sachs &
Co.'s proprietary Black-Litterman asset allocation technique in an effort to
optimally balance these two goals. This technique combines the Quantitative
Research Group's market forecasts with economic equilibrium in seeking to
construct risk-controlled portfolios.
 
 WHAT ARE THE RISK FACTORS AND SPECIAL CHARACTERISTICS THAT I SHOULD CONSIDER
BEFORE INVESTING?
 
  The Portfolios are intended as an efficient and cost-effective method of
giving investors access to four different portfolio mixes. The risk/return
balance of each Portfolio is varied by the proportion of assets allocated to
the different kinds of investments. For example, the Aggressive Growth Strategy
Portfolio intends to invest substantially all of its assets in Underlying Funds
that invest in equity securities. An investor seeking capital appreciation
potential, with a longer time horizon and a tolerance for volatility, might
choose this Portfolio. Conversely, an investor seeking a balance of income and
growth, with a shorter time horizon and less tolerance for volatility, might
choose the Income Strategy Portfolio or Growth and Income Strategy Portfolio,
which invest a larger portion of their assets in Underlying Funds that invest
in fixed income securities.
 
  Because the assets of each Portfolio are invested in Underlying Funds, each
Portfolio's investment performance is directly related to the investment
performance of the Underlying Funds held by it. The ability of a Portfolio to
meet its investment objective is, therefore, also directly related to the
ability of the Underlying Funds held to meet their objectives, as well as the
allocation among those Underlying Funds by the Investment Adviser.
 
  The value of the Underlying Funds' investments, and the net asset values
("NAV") of the Shares of both the Underlying Funds and the Portfolios, will
fluctuate in response to changes in market and economic conditions, as well as
the financial condition and prospects of issuers in which the Underlying Funds
invest. An Underlying Fund's use of certain investment techniques, including
derivatives, forward contracts, options and futures, will subject the Fund to
greater risk than funds that do not employ such techniques. In addition,
investments by certain Underlying Funds in foreign issuers, currencies, real
estate investment trusts and small market capitalization companies will expose
those Funds to a higher degree of risk and price volatility. These investments
include securities of issuers located in countries in Asia, Latin America,
Eastern Europe and Africa
 
                                       3
<PAGE>
 
whose economies or securities markets are considered not to be fully developed
("Emerging Countries"). Some Underlying Funds may also invest in non-investment
grade fixed-income securities (commonly referred to as "junk bonds"), which are
considered to be speculative by traditional investment standards.
 
  An investor in the Portfolios should realize that investments in the
Underlying Funds can be made directly. By investing in the Underlying Funds
indirectly through the Portfolios, an investor will incur not only a
proportionate share of the expenses of the Underlying Funds (including
operating costs and investment management fees), but also expenses of the
Portfolios. While the Portfolios offer a greater level of diversification than
many other types of mutual funds, a single Portfolio may not provide a complete
investment program for an investor.
 
  For a further description of the risks involved in an investment in the
Portfolios and the Underlying Funds, see "Risk Factors and Special
Considerations" and Appendix A to this Prospectus.
 
 WHO MANAGES THE PORTFOLIOS?
 
  Goldman Sachs Asset Management serves as Investment Adviser to the Portfolios
and, except as noted, to each Underlying Fund. Goldman Sachs Funds Management,
L.P. serves as investment adviser to the CORE U.S. Equity, Capital Growth,
Adjustable Rate Government and Short Duration Government Funds. Goldman Sachs
Asset Management International serves as investment adviser to the
International Equity, Japanese Equity, International Small Cap, Emerging
Markets Equity, Asia Growth and Global Income Funds. As of July 24, 1998, the
Investment Adviser, together with its affiliates, acted as investment adviser
or distributor for assets in excess of $168 billion.
 
 WHO DISTRIBUTES THE PORTFOLIOS' SHARES?
 
  Goldman Sachs acts as distributor of each Portfolio's Shares (the
"Distributor").
 
 WHAT IS THE MINIMUM INVESTMENT?
 
  The minimum initial investment is $1,000,000 or $10,000,000 (depending upon
an investor's eligibility) in Institutional Shares of a Portfolio alone or in
combination with Institutional Shares (or the corresponding class) of any other
mutual fund sponsored by Goldman Sachs and designated as an eligible Fund for
this purpose.
 
 HOW DO I PURCHASE INSTITUTIONAL SHARES?
 
  You may purchase Institutional Shares of the Portfolios through Goldman
Sachs. Institutional Shares are purchased at the current NAV without any sales
load. See "Purchase of Institutional Shares."
 
 HOW DO I SELL MY INSTITUTIONAL SHARES?
 
  You may redeem Institutional Shares upon request on any Business Day, as
defined under "Additional Information," at the NAV next determined after
receipt of such request in proper form. See "Redemption of Institutional
Shares."
 
                                       4
<PAGE>
 
 
 HOW DO I RECEIVE DIVIDENDS AND DISTRIBUTIONS?
 
<TABLE>
<CAPTION>
                                                 INVESTMENT INCOME    CAPITAL
                                                     DIVIDENDS         GAINS
PORTFOLIO                                        DECLARED AND PAID DISTRIBUTIONS
- ---------                                        ----------------- -------------
<S>                                              <C>               <C>
Income Strategy.................................       Monthly       Annually
Growth and Income Strategy......................     Quarterly       Annually
Growth Strategy.................................     Quarterly       Annually
Aggressive Growth Strategy......................      Annually       Annually
</TABLE>
 
  Recordholders of Institutional Shares may receive dividends and distributions
in additional Institutional Shares of the Portfolio in which they have invested
or may elect to receive them in cash. For further information concerning
dividends and distributions, see "Dividends."
 
                                       5
<PAGE>
 
 
                               FEES AND EXPENSES
                            (INSTITUTIONAL SHARES)
 
 
<TABLE>
<CAPTION>
                                                GROWTH AND           AGGRESSIVE
                                       INCOME     INCOME    GROWTH     GROWTH
                                      STRATEGY   STRATEGY  STRATEGY   STRATEGY
                                      PORTFOLIO PORTFOLIO  PORTFOLIO PORTFOLIO
                                      --------- ---------- --------- ----------
<S>                                   <C>       <C>        <C>       <C>
SHAREHOLDER TRANSACTION EXPENSES:
 Maximum Sales Charge Imposed on Pur-
  chases.............................   None       None      None       None
 Maximum Sales Charge Imposed on Re-
  invested Dividends.................   None       None      None       None
 Redemption Fees.....................   None       None      None       None
 Exchange Fees.......................   None       None      None       None
ANNUAL FUND OPERATING EXPENSES:
 (as a percentage of average daily
  net assets)/1/
 Management Fees (for asset
  allocation) (after applicable
  limitations)/2/....................   0.15%      0.15%     0.15%      0.15%
 Distribution Fees...................   None       None      None       None
Other Expenses:
 Other Expenses (after fee and ex-
  pense limitations)/3/..............   0.04%      0.04%     0.04%      0.04%
Underlying Fund Expenses/1/..........   0.69%      0.79%     0.84%      0.90%
                                        ----       ----      ----       ----
TOTAL FUND OPERATING EXPENSES (after
 expense limitations)/4/.............   0.88%      0.98%     1.03%      1.09%
                                        ====       ====      ====       ====
</TABLE>
- --------
/1/The Portfolios' annual operating expenses have been restated to reflect
   fees and expenses in effect as of September 1, 1998. Underlying Fund
   expenses for each Portfolio are based upon the strategic allocation of each
   Portfolio's investment in the Underlying Funds and upon the total operating
   expenses of the Underlying Funds as in effect on September 1, 1998. Actual
   Underlying Fund expenses incurred by each Portfolio may vary with changes
   in the allocation of each Portfolio's assets among the Underlying Funds and
   with other events that directly affect the expenses of the Underlying
   Funds. For additional information on the total operating expenses of each
   Underlying Fund, please refer to "Expenses."
/2/The Investment Adviser has voluntarily agreed that a portion of the
   management fees would not be imposed on the Portfolios equal to 0.20%.
   Without such limitation, management fees would be 0.35% of each Portfolio's
   average daily net assets.
/3/The Investment Adviser has voluntarily agreed to reduce or limit certain
   other expenses (excluding management fees, transfer agency fees (equal to
   0.04% of the average daily net assets of each Portfolio's Institutional
   Shares), taxes, interest, brokerage fees, and litigation, indemnification
   and other extraordinary expenses) for each Portfolio to the extent such
   expenses exceed 0.00% of the Portfolio's average daily net assets.
/4/Without the limitations described above, "Other Expenses" and "Total
   Operating Expenses" of the Institutional Shares of the Portfolios would be
   as set forth below:
 
<TABLE>
<CAPTION>
                                              GROWTH AND                      AGGRESSIVE
                            INCOME STRATEGY INCOME STRATEGY GROWTH STRATEGY GROWTH STRATEGY
                               PORTFOLIO       PORTFOLIO       PORTFOLIO       PORTFOLIO
                            --------------- --------------- --------------- ---------------
   <S>                      <C>             <C>             <C>             <C>
   Other Expenses..........      0.40%           0.17%           0.20%           0.33%
   Total Operating Ex-
    penses.................      1.44%           1.31%           1.39%           1.58%
</TABLE>
 
                                       6
<PAGE>
 
  The Portfolios will invest only in Institutional Shares of the Underlying
Funds and, accordingly, will not pay any sales load or distribution and
service fees in connection with their investments in Shares of the Underlying
Funds. The Portfolios will, however, indirectly bear their pro rata share of
the fees and expenses incurred by the Underlying Funds that are applicable to
Institutional Shareholders. The following example assumes the payment by each
Portfolio of operating expenses at the levels set forth in the table above and
of its pro rata share of the Institutional Share expenses of the Underlying
Funds (also as set forth above) in which a Portfolio is invested.
 
EXAMPLE
 
  You would pay the following expenses on a hypothetical $1,000 investment,
assuming (1) a 5% annual return; and (2) redemption at the end of each time
period:
 
<TABLE>
<CAPTION>
                                                                  1 YEAR 3 YEARS
                                                                  ------ -------
<S>                                                               <C>    <C>
Income Strategy Portfolio........................................  $ 9     $28
Growth and Income Strategy Portfolio.............................  $10     $31
Growth Strategy Portfolio........................................  $11     $33
Aggressive Growth Strategy Portfolio.............................  $11     $35
</TABLE>
 
  The Investment Adviser and Goldman Sachs may modify or discontinue any of
the limitations set forth above in the future at their discretion. The
information set forth in the foregoing table and hypothetical example relates
only to Institutional Shares of the Portfolios. Each Portfolio also offers
Class A, B, C and Service Shares, which are subject to different fees and
expenses (which affect performance), have different minimum investment
requirements and are entitled to different services. Information regarding
Class A, B, C and Service Shares of the Portfolios may be obtained from an
investor's sales representative or from Goldman Sachs by calling the number on
the back cover of this Prospectus.
 
  Institutions that invest in Institutional Shares on behalf of their
customers may charge fees directly to their customer accounts in connection
with their investments. Such fees, if any, may affect the return such
customers realize with respect to their investments.
 
  Certain institutions may also receive other compensation in connection with
the sale and distribution of such Shares or for services to their customers'
accounts and/or the Portfolios. For additional information regarding such
compensation, see "Purchase of Institutional Shares" in this Prospectus and
the Additional Statement.
 
  The purpose of the foregoing tables is to assist investors in understanding
the various fees and expenses of a Portfolio that an investor will bear
directly or indirectly. As stated, the information on the fees and expenses
included in the tables and hypothetical example above is based on each
Portfolio's fees and estimated expenses and allocation among the Underlying
Funds, and should not be considered as representative of past or future
expenses. Actual fees and expenses may be more or less than those indicated.
Moreover, while the example assumes a 5% annual return, a Portfolio's actual
performance will vary and may result in an actual return more or less than 5%.
See "Management--Investment Adviser."
 
                                       7
<PAGE>
 
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
  The four Portfolios described in this Prospectus are intended for investors
who prefer to have their asset allocation decisions made by professional money
managers. Each Portfolio seeks to achieve its investment objective by
investing within specified equity and fixed-income ranges among Underlying
Funds having different combinations of investments and different degrees of
potential investment risk and reward. An investor should choose a Portfolio
based on personal objectives, investment time horizon, tolerance for risk and
personal financial circumstances.
 
  The Income Strategy Portfolio's investment objective is to seek a high level
of current income with greater stability of principal than an investment in
equity securities alone. The Growth and Income Strategy Portfolio's investment
objective is to seek long-term capital appreciation and current income. The
Growth Strategy Portfolio's investment objective is to seek capital
appreciation and secondarily current income. The Aggressive Growth Strategy
Portfolio's investment objective is to seek capital appreciation. There can be
no assurance that any Portfolio's investment objective will be achieved.
 
  In managing the Portfolios, the Investment Adviser will seek to maintain
different allocations among the Underlying Equity Funds and the Underlying
Fixed-Income Funds depending on a Portfolio's investment objective. The tables
below illustrate the initial Underlying Equity/Fixed-Income Fund allocation
targets and ranges for each Portfolio:
 
     EQUITY/FIXED-INCOME RANGE (PERCENTAGE OF EACH PORTFOLIO'S NET ASSETS)
 
<TABLE>
<CAPTION>
    NAME OF PORTFOLIO                                            TARGET  RANGE
    -----------------                                            ------ --------
<S>                                                              <C>    <C>
Income Strategy Portfolio
  Equity........................................................   40%   20%-60%
  Fixed-Income..................................................   60%   40%-80%
Growth and Income Strategy Portfolio
  Equity........................................................   60%   40%-80%
  Fixed-Income..................................................   40%   20%-60%
Growth Strategy Portfolio
  Equity........................................................   80%  60%-100%
  Fixed-Income..................................................   20%    0%-40%
Aggressive Growth Strategy Portfolio
  Equity........................................................  100%  75%-100%
  Fixed-Income..................................................    0%    0%-25%
</TABLE>
 
  The Investment Adviser will invest in particular Underlying Funds based on
various criteria. Among other things, the Investment Adviser will analyze the
Underlying Funds' respective investment objectives, policies and investment
strategies in order to determine which Underlying Funds, in combination with
other Underlying Funds, are appropriate in light of a Portfolio's investment
objectives.
 
  Each Portfolio is authorized to invest in any or all of the Underlying
Funds. However, it is expected that a Portfolio will normally be invested in
only some of the Underlying Funds at any particular time. A Portfolio's
investment in any of the Underlying Funds may and, in some cases is expected
to, exceed 25% of its total assets.
 
                                       8
<PAGE>
 
For example, the Growth Strategy and Aggressive Growth Strategy Portfolios are
each expected to invest initially more than 25% of their assets in the Growth
& Income Fund described below. Similarly, it is expected that the Aggressive
Growth Strategy and Income Strategy Portfolios will invest more than 25% of
their assets in the CORE International and Short Duration Government Funds,
respectively. The Investment Adviser also expects that each Portfolio (in
addition to those listed above) will initially invest a relatively significant
percentage of its equity allocation in the Growth & Income, CORE Large Cap
Growth and CORE International Equity Funds; that the Growth and Income
Strategy Portfolio will invest a relatively significant percentage of its
assets in the Core Fixed Income and Global Income Funds; and that the Income
Strategy Portfolio will invest a relatively significant percentage of its
assets in the Global Income Fund. THE PARTICULAR UNDERLYING FUNDS IN WHICH
EACH PORTFOLIO MAY INVEST, THE EQUITY/FIXED-INCOME FUND TARGETS AND RANGES AND
THE INVESTMENTS IN EACH UNDERLYING FUND MAY BE CHANGED FROM TIME TO TIME
WITHOUT SEEKING THE APPROVAL OF THE PORTFOLIO'S SHAREHOLDERS.
 
  Changes in the NAVs of the Underlying Funds will affect a Portfolio's NAV.
Because each Portfolio invests primarily in other mutual funds, which
fluctuate in value, the Portfolios' Shares will correspondingly fluctuate in
value. Although the Portfolios normally seek to remain substantially invested
in the Underlying Funds, a Portfolio may invest a portion of its assets in
high quality, short-term debt obligations to maintain liquidity in order to
meet shareholder redemptions and other short-term cash needs. These
obligations may include commercial paper, certificates of deposit, bankers'
acceptances, repurchase agreements, debt obligations backed by the full faith
and credit of the U.S. Government and demand and time deposits of domestic and
foreign banks and savings and loan associations. There may be times when, in
the opinion of the Investment Adviser, abnormal market or economic conditions
warrant that, for temporary defensive purposes, a Portfolio invest without
limitation in short-term obligations. A Portfolio may also borrow money for
temporary or emergency purposes.
 
  Each Portfolio's turnover rate is expected not to exceed 50% annually. A
Portfolio may purchase or sell securities to: (a) accommodate purchases and
sales of its Shares; (b) change the percentages of its assets invested in each
of the Underlying Funds in response to economic or market conditions; and (c)
maintain or modify the allocation of its assets among the Underlying Funds
within the percentage ranges described above.
 
  Each Portfolio is subject to certain investment restrictions that are
described in detail under "Investment Restrictions" in the Additional
Statement. Fundamental investment restrictions of a Portfolio cannot be
changed without approval of a majority of the outstanding Shares of that
Portfolio. Each Portfolio's investment objectives and all policies not
specifically designated as fundamental are non-fundamental and may be changed
without shareholder approval. If there is a change in a Portfolio's investment
objective, shareholders should consider whether that Portfolio remains an
appropriate investment in light of their then current financial positions and
needs.
 
  For information about the investment objectives of the Underlying Funds and
their investment securities, techniques and risks, see "Description of the
Underlying Funds" and Appendix A in this Prospectus, the Additional Statement
and the prospectus for each of the Underlying Funds.
 
                                       9
<PAGE>
 
 
                    RISK FACTORS AND SPECIAL CONSIDERATIONS
 
INVESTING IN UNDERLYING FUNDS
 
  The investments of each Portfolio are concentrated in the Underlying Funds,
and each Portfolio's investment performance is directly related to the
investment performance of the Underlying Funds held by it. The ability of each
Portfolio to meet its investment objectives is directly related to the ability
of the Underlying Funds to meet their objectives as well as the allocation
among those Underlying Funds by the Investment Adviser. The share prices and
yields of both the Portfolios and the Underlying Funds will fluctuate in
response to various market and economic factors related to the equity and
fixed-income markets. There can be no assurance that the investment objectives
of any Portfolio or any Underlying Fund will be achieved.
 
INVESTMENTS OF THE UNDERLYING FUNDS
 
  Because each Portfolio invests in the Underlying Funds, shareholders of each
Portfolio will be affected by the investment policies of the Underlying Funds
in direct proportion to the amount of assets each Portfolio allocates to those
Funds. Each Portfolio may invest in Underlying Funds that in turn invest in
small capitalization companies and foreign issuers and thus are subject to
additional risks, including changes in foreign currency exchange rates and
political risk. Foreign investments may include securities of issuers located
in Emerging Countries in Asia, Latin America, Eastern Europe and Africa. Each
Portfolio may also invest in Underlying Funds that in turn invest in non-
investment grade fixed-income securities ("junk bonds"), which are considered
speculative by traditional standards. In addition, the Underlying Funds may
purchase derivative securities; enter into forward currency transactions; lend
their portfolio securities; enter into futures contracts and options
transactions; purchase zero coupon bonds and payment-in-kind bonds; purchase
securities issued by real estate investment trusts and other issuers in the
real estate industry; purchase restricted and illiquid securities; enter into
forward roll transactions; purchase securities on a when-issued or delayed
delivery basis; enter into repurchase agreements; borrow money; and engage in
various other investment practices. The risks presented by these investment
practices are discussed in Appendix A to this Prospectus, the Additional
Statement and the prospectus for each of the Underlying Funds.
 
AFFILIATED PERSONS
 
  In managing the Portfolios, the Investment Adviser will have the authority
to select and substitute Underlying Funds. The Investment Adviser is subject
to conflicts of interest in allocating Portfolio assets among the various
Underlying Funds both because the fees payable to it and/or its affiliates by
some Underlying Funds are higher than the fees payable by other Underlying
Funds and because the Investment Adviser and its affiliates are also
responsible for managing the Underlying Funds. The Trustees and officers of
the Trust may also have conflicting interests in fulfilling their fiduciary
duties to both the Portfolios and the Underlying Funds.
 
EXPENSES
 
  An investor in a Portfolio should realize that investments in the Underlying
Funds can be made directly. By investing in the Underlying Funds indirectly
through a Portfolio, an investor will incur not only a proportionate share of
the expenses of the Underlying Funds held by the Portfolio (including
operating costs and investment management fees), but also expenses of the
Portfolio.
 
                                      10
<PAGE>
 
 
                        DESCRIPTION OF UNDERLYING FUNDS
 
  The following is a concise description of the investment objectives and
practices for each of the Underlying Funds that are available for investment
by the Portfolios as of the date of the Prospectus. A Portfolio may also
invest in other Underlying Funds that may become available for investment in
the future at the discretion of the Investment Adviser without shareholder
approval. There can be no assurance that the investment objectives of the
Underlying Funds will be met. Additional information regarding the investment
practices of the Underlying Funds is located in Appendix A to this Prospectus,
in the Additional Statement and in the prospectus of each of the Underlying
Funds. No offer is made in this Prospectus of any of the Underlying Funds.
 
<TABLE>
<CAPTION>
     FUND NAMES      INVESTMENT OBJECTIVES           INVESTMENT CRITERIA
  ----------------  ------------------------ ----------------------------------
  <C>               <C>                      <S>
  GROWTH AND IN-    Long-term growth of      At least 65% of total assets in
  COME FUND         capital and growth of    equity securities that are
                    income.                  considered to have favorable
                                             prospects for capital appreciation
                                             and/or dividend paying ability.
- -------------------------------------------------------------------------------
  CORE U.S. EQUITY  Long-term growth of      At least 90% of total assets in
  FUND              capital and dividend     equity securities of U.S. issuers,
                    income.                  including certain foreign issuers
                                             traded in the U.S. The Fund seeks
                                             to achieve its objective through a
                                             broadly diversified portfolio of
                                             large cap and blue chip equity
                                             securities representing all major
                                             sectors of the U.S. economy. The
                                             Fund's investments are selected
                                             using both a variety of
                                             quantitative techniques and
                                             fundamental research in seeking to
                                             maximize the Fund's expected
                                             return, while maintaining risk,
                                             style, capitalization and industry
                                             characteristics similar to the S&P
                                             500 Index.
- -------------------------------------------------------------------------------
  CORE LARGE CAP    Long-term growth of      At least 90% of total assets in
  GROWTH FUND       capital. Dividend income equity securities of U.S issuers,
                    is a secondary           including certain foreign issuers
                    consideration.           traded in the U.S. The Fund seeks
                                             to achieve its objective through a
                                             broadly diversified portfolio of
                                             equity securities of large cap
                                             U.S. issuers that are expected to
                                             have better prospects for earnings
                                             growth than the growth rate of the
                                             general domestic economy. The
                                             Fund's investments are selected
                                             using both a variety of
                                             quantitative techniques and
                                             fundamental research in seeking to
                                             maximize the Fund's expected
                                             return, while maintaining risk,
                                             style, capitalization and industry
                                             characteristics similar to the
                                             Russell 1000 Growth Index.
- -------------------------------------------------------------------------------
  CORE SMALL CAP    Long-term growth of      At least 90% of total assets in
  EQUITY FUND       capital.                 equity securities of U.S. issuers,
                                             including certain foreign issuers
                                             traded in the U.S. The Fund seeks
                                             to achieve its investment
                                             objective through a broadly
                                             diversified portfolio of equity
                                             securities of U.S. issuers which
                                             are included in the Russell 2000
                                             Index at the time of investment.
                                             The Fund's investments are
                                             selected using both a variety of
                                             quantitative techniques and
                                             fundamental research in seeking to
                                             maximize the Fund's expected
                                             return, while maintaining risk,
                                             style, capitalization and industry
                                             characteristics similar to the
                                             Russell 2000 Index.
</TABLE>
 
                                                                    (continued)
 
                                      11
<PAGE>
 
<TABLE>
<CAPTION>
     FUND NAMES      INVESTMENT OBJECTIVES           INVESTMENT CRITERIA
  ----------------  ------------------------ ----------------------------------
  <C>               <C>                      <S>
  CORE INTERNA-     Long-term growth of      At least 90% of total assets in
  TIONAL EQUITY     capital.                 equity securities of companies
  FUND                                       organized outside the United
                                             States or whose securities are
                                             principally traded outside the
                                             United States. The Fund seeks
                                             broad representation of large cap
                                             issuers across major countries and
                                             sectors of the international
                                             economy. The Fund's investments
                                             are selected using both a variety
                                             of quantitative techniques and
                                             fundamental research in seeking to
                                             maximize the Fund's expected
                                             return, while maintaining risk,
                                             style, capitalization and industry
                                             characteristics similar to the
                                             unhedged Morgan Stanley Capital
                                             International (MSCI) Europe,
                                             Australasia and Far East Index
                                             (the "EAFE Index"). The Fund may
                                             employ certain currency management
                                             techniques.
- -------------------------------------------------------------------------------
  CAPITAL GROWTH    Long-term capital        At least 90% of total assets in a
  FUND              growth.                  diversified portfolio of equity
                                             securities. Long-term capital
                                             appreciation potential is
                                             considered in selecting
                                             investments.
- -------------------------------------------------------------------------------
  MID CAP EQUITY    Long-term capital        At least 65% of total assets in
  FUND              appreciation.            equity securities of companies
                                             with public stock market
                                             capitalizations within the range
                                             of the market capitalization of
                                             companies constituting the Russell
                                             Midcap Index at the time of the
                                             investment (currently between $400
                                             million and $16 billion).
- -------------------------------------------------------------------------------
  INTERNATIONAL     Long-term capital        Substantially all, and at least
  EQUITY FUND       appreciation.            65%, of total assets in equity
                                             securities of companies organized
                                             outside the United States or whose
                                             securities are principally traded
                                             outside the United States. The
                                             Fund may employ certain currency
                                             management techniques.
- -------------------------------------------------------------------------------
  SMALL CAP VALUE   Long-term capital        At least 65% of total assets in
  FUND              growth.                  equity securities of companies
                                             with public stock market
                                             capitalizations of $1 billion or
                                             less at the time of investment.
- -------------------------------------------------------------------------------
  EMERGING MARKETS  Long-term capital        Substantially all, and at least
  EQUITY FUND       appreciation.            65%, of total assets in equity
                                             securities of emerging country
                                             issuers. The Fund may employ
                                             certain currency management
                                             techniques.
- -------------------------------------------------------------------------------
  ASIA GROWTH FUND  Long-term capital        Substantially all, and at least
                    appreciation.            65%, of total assets in equity
                                             securities of companies in China,
                                             Hong Kong, India, Indonesia,
                                             Malaysia, Pakistan, the
                                             Philippines, Singapore, South
                                             Korea, Sri Lanka, Taiwan and
                                             Thailand. The Fund may employ
                                             certain currency management
                                             techniques.
- -------------------------------------------------------------------------------
  REAL ESTATE SE-   Total return comprised   Substantially all, and at least
  CURITIES FUND     of long-term growth of   80%, of total assets in a
                    capital and dividend     diversified portfolio of equity
                    income.                  securities of issuers that are
                                             primarily engaged in or related to
                                             the real estate industry. The Fund
                                             expects that a substantial portion
                                             of its total assets will be
                                             invested in real estate investment
                                             trusts ("REITS").
- -------------------------------------------------------------------------------
  JAPANESE EQUITY   Long-term capital        Substantially all, and at least
  FUND              appreciation.            65%, of total assets in equity
                                             securities of Japanese companies.
                                             The Fund may employ certain
                                             currency management techniques.
- -------------------------------------------------------------------------------
  INTERNATIONAL     Long-term capital        Substantially all, and at least
  SMALL CAP FUND    appreciation.            65%, of total assets in equity
                                             securities of companies with
                                             public stock market
                                             capitalizations of $1 billion or
                                             less at the time of investment
                                             that are organized outside the
                                             United States or whose securities
                                             are principally traded outside the
                                             United States. The Fund may employ
                                             certain currency management
                                             techniques.
</TABLE>
 
                                       12
<PAGE>
 
<TABLE>
<CAPTION>
                                                              APPROXIMATE
                          INVESTMENT       DURATION OR       INTEREST RATE
      FUND NAMES          OBJECTIVES        MATURITY          SENSITIVITY  INVESTMENT SECTOR CREDIT QUALITY OTHER INVESTMENTS
- ----------------------  -------------- -------------------   ------------- ----------------- -------------- -----------------
<S>                     <C>            <C>                   <C>           <C>               <C>            <C>
FINANCIAL SQUARE PRIME  Maximize         Maximum Maturity of  3-month      Money market       High Quality  N/A
OBLIGATIONS FUND        current income   Individual           bill         instruments        (short-term
                        to the extent    Investments =                     including U.S.     ratings of
                        consistent       13 months at time                 Government         A-1, P-1 or
                        with the         of purchase                       Securities, U.S.   comparable
                        maintenance of   Maximum Dollar-                   bank obligations,  quality).
                        liquidity.       Weighted Average                  commercial paper
                                         Portfolio Maturity                and other short-
                                         = 90 days                         term obligations
                                                                           of U.S.
                                                                           corporations,
                                                                           governmental and
                                                                           other entities,
                                                                           and related
                                                                           repurchase
                                                                           agreements.
- -----------------------------------------------------------------------------------------------------------------------------
ADJUSTABLE RATE         A high level     Target Duration =    9-month      At least 65% of    U.S.          Fixed-rate
GOVERNMENT FUND         of current       6-month to 1-year    note         total assets in    Government    mortgage pass-
                        income,          U.S. Treasury                     securities issued  Securities    through
                        consistent       Security                          or guaranteed by                 securities and
                        with low         Maximum Duration*=                the U.S.                         repurchase
                        volatility of    2 years                           government, its                  agreements
                        principal.                                         agencies,                        collateralized
                                                                           instrumentalities                by U.S.
                                                                           or sponsored                     Government
                                                                           enterprises                      Securities.
                                                                           ("U.S. Government
                                                                           Securities") that
                                                                           are adjustable
                                                                           rate mortgage
                                                                           pass-through
                                                                           securities and
                                                                           other mortgage
                                                                           securities with
                                                                           periodic interest
                                                                           rate resets.
- -----------------------------------------------------------------------------------------------------------------------------
SHORT DURATION          A high level     Target Duration =    2-year       At least 65% of    U.S.          Mortgage pass-
GOVERNMENT FUND         of current       2-year U.S.          bond         total assets in    Government    through
                        income and       Treasury Security                 U.S. Government    Securities    securities and
                        secondarily,     plus or minus .5                  Securities and                   other
                        in seeking       years                             repurchase                       securities
                        current          Maximum Duration*=                agreements                       representing an
                        income, may      3 years                           collateralized by                interest in or
                        also consider                                      such securities.                 collateralized
                        the potential                                                                       by mortgage
                        for capital                                                                         loans.
                        appreciation.
- -----------------------------------------------------------------------------------------------------------------------------
GOVERNMENT INCOME FUND  A high level     Target Duration =    5-year       At least 65% of    U.S.          Non-government
                        of current       Lehman Brothers      bond         assets in U.S.     Government    mortgage pass-
                        income,          Mutual Fund                       Government         Securities    through
                        consistent       Government/Mortgage               Securities,        and non-U.S.  securities,
                        with safety of   Index plus or minus               including          Government    asset-backed
                        principal.       1 year                            mortgage-backed    Securities =  securities and
                                         Maximum Duration*=                U.S. Government    AAA/Aaa       corporate
                                         6 years                           Securities and                   fixed-income
                                                                           repurchase                       securities.
                                                                           agreements
                                                                           collateralized by
                                                                           such securities.
</TABLE>
 
                                       13
<PAGE>
 
<TABLE>
<CAPTION>
                                                       APPROXIMATE
                          INVESTMENT    DURATION OR   INTEREST RATE
      FUND NAMES          OBJECTIVES      MATURITY     SENSITIVITY  INVESTMENT SECTOR CREDIT QUALITY OTHER INVESTMENTS
- ----------------------  -------------- -------------- ------------- ----------------- -------------- -----------------
<S>                     <C>            <C>            <C>           <C>               <C>            <C>
CORE FIXED INCOME FUND  Total return   Target          5-year       At least 65% of    Minimum =     Foreign fixed-
                        consisting of  Duration =      bond         assets in fixed-   BBB/Baa       income,
                        capital        Lehman                       income             Minimum for   municipal and
                        appreciation   Brothers                     securities,        non-dollar    convertible
                        and income     Aggregate Bond               including U.S.     securities =  securities,
                        that exceeds   Index plus or                Government         AA/Aa         foreign
                        the total      minus 1 year                 Securities,                      currencies and
                        return of the  Maximum                      corporate,                       repurchase
                        Lehman         Duration* = 6                mortgage-backed                  agreements
                        Brothers       years                        and asset-backed                 collateralized
                        Aggregate Bond                              securities.                      by U.S.
                        Index.                                                                       Government
                                                                                                     Securities.
- ----------------------------------------------------------------------------------------------------------------------
GLOBAL INCOME FUND      A high total   Target          6-year       Securities of      Minimum =     Mortgage and
                        return,        Duration =      bond         U.S. and foreign   BBB/Baa       asset-backed
                        emphasizing    J.P. Morgan                  governments and    At least 50%  securities,
                        current        Global                       corporations.      = AAA/Aaa     foreign
                        income, and,   Government                                                    currencies and
                        to a lesser    Bond Index                                                    repurchase
                        extent,        (hedged) plus                                                 agreements
                        providing      or minus 2.5                                                  collateralized
                        opportunities  years                                                         by U.S.
                        for capital    Maximum                                                       Government
                        appreciation.  Duration* =                                                   Securities or
                                       7.5 years                                                     certain foreign
                                                                                                     government
                                                                                                     securities.
- ----------------------------------------------------------------------------------------------------------------------
HIGH YIELD FUND         A high level   Target          6-year       Except for         At least 65%  Mortgage-backed
                        of current     Duration =      bond         temporary          = BB/Ba or    and asset-
                        income and     Lehman                       defensive          below         backed
                        capital        Brothers High                purposes, at                     securities,
                        appreciation.  Yield Bond                   least 65% of                     U.S. Government
                                       Index plus or                assets in fixed-                 Securities,
                                       minus 2.5                    income                           investment
                                       years                        securities rated                 grade corporate
                                       Maximum                      below investment                 fixed- income
                                       Duration* =                  grade, including                 securities,
                                       7.5 years                    U.S. and non-                    structured
                                                                    U.S. dollar                      securities,
                                                                    corporate debt,                  foreign
                                                                    foreign                          currencies and
                                                                    government                       repurchase
                                                                    securities,                      agreements
                                                                    convertible                      collateralized
                                                                    securities and                   by U.S.
                                                                    preferred stock.                 Government
                                                                                                     Securities.
</TABLE>
- -----
* Under normal interest rate conditions.
 
                                       14
<PAGE>
 
  In pursuing their investment objectives and programs, each of the Underlying
Funds is permitted to engage in a wide range of investment policies. The risks
of the Underlying Funds are determined by the nature of the securities held
and the investment strategies used by the Funds' investment advisers. Certain
of these policies are described below and further information about the
investment policies, strategies and risks of the Underlying Funds is contained
in Appendix A to this Prospectus and in the Additional Statement as well as
the prospectuses of the Underlying Funds.
 
UNDERLYING EQUITY FUNDS
 
  The Underlying Equity Funds may purchase common stocks, preferred stocks,
interests in real estate investment trusts, convertible debt obligations,
convertible preferred stocks, equity interests in trusts, partnerships, joint
ventures, limited liability companies and similar enterprises, warrants and
stock purchase rights ("equity securities"). In choosing securities, a Fund's
investment adviser utilizes first-hand fundamental research, including
visiting company facilities to assess operations and to meet decision-makers.
An investment adviser may also use macro analysis of numerous economic and
valuation variables to anticipate changes in company earnings and the overall
investment climate. The investment advisers are able to draw on the research
and market expertise of the Goldman Sachs Global Investment Research
Department and other affiliates, as well as information provided by other
securities dealers. Equity securities held by an Underlying Fund will
generally be sold when an investment adviser believes that the market price
fully reflects or exceeds the securities' fundamental valuation or when other
more attractive investments are identified.
 
  DOMESTIC VALUE STYLE FUNDS. The Growth and Income, Mid Cap Equity and Small
Cap Value Funds are managed using a value oriented approach. The Funds'
investment adviser evaluates securities using fundamental analysis and intends
to purchase equity securities that are, in its view, underpriced relative to a
combination of such companies' long-term earnings prospects, growth rate, free
cash flow and/or dividend-paying ability.
 
  Consideration will be given to the business quality of the issuer. Factors
positively affecting the investment adviser's view of that quality include the
competitiveness and degree of regulation in the markets in which the company
operates, the existence of a management team with a record of success, the
position of the company in the markets in which it operates, the level of the
company's financial leverage and the sustainable return on capital invested in
the business. The Funds may also purchase securities of companies that have
experienced difficulties and that, in the opinion of the investment adviser,
are available at attractive prices.
 
  DOMESTIC GROWTH STYLE FUND. The Capital Growth Fund is managed using a
growth oriented approach. Equity securities for the Fund are selected based on
their prospects for above average growth. The Fund's investment adviser will
select securities of growth companies trading, in the investment adviser's
opinion, at a reasonable price relative to other industries, competitors and
historical price/earnings multiples. The Fund will generally invest in
companies whose earnings are believed to be in a relatively strong growth
trend, or, to a lesser extent, in companies in which significant further
growth is not anticipated but whose market value per share is thought to be
undervalued.
 
  QUANTITATIVE STYLE FUNDS. The CORE U.S. Equity, CORE Large Cap Growth, CORE
Small Cap Equity and CORE International Equity Funds (the "CORE Equity Funds")
are managed using both quantitative and fundamental techniques. CORE is an
acronym for "Computer-Optimized, Research-Enhanced," which reflects the Funds'
investment process. This investment process and the proprietary multifactor
model used to implement it are discussed below.
 
                                      15
<PAGE>
 
  Quantitative Investment Process. The Funds' investment advisers begin with a
broad universe of U.S. equity securities for the CORE U.S. Equity, CORE Large
Cap Growth and CORE Small Cap Equity Funds (the "CORE U.S. Equity Funds"), and
a broad universe of foreign equity securities for the CORE International
Equity Fund. The investment advisers use proprietary multifactor models (each
a "Multifactor Model") to forecast the returns of different markets,
currencies and individual securities. In the case of a U.S. equity security
followed by the Goldman Sachs Global Investment Research Department (the
"Research Department"), a rating is assigned based upon the Research
Department's evaluation. In the discretion of the investment adviser, ratings
may also be assigned to U.S. equity securities based on research ratings
obtained from other industry sources. In the case of a foreign equity
security, an investment adviser may rely on research from both the Research
Department and other industry sources.
 
  In building a diversified portfolio for each CORE Equity Fund, an investment
adviser utilizes optimization techniques to seek to maximize the Fund's
expected return, while maintaining a risk profile similar to the Fund's
benchmark. Each portfolio is primarily composed of securities rated highest by
the foregoing investment process and has risk characteristics and industry
weightings similar to the relevant Fund's benchmark.
 
  Quantitative Multifactor Models. The Multifactor Models are rigorous
computerized rating systems for forecasting the returns of different equity
markets, currencies, and individual equity securities according to fundamental
investment characteristics. The CORE U.S. Equity Funds use one Multifactor
Model to forecast the returns of securities held in each Fund's portfolio. The
CORE International Equity Fund uses multiple Multifactor Models to forecast
returns. Currently, the CORE International Equity Fund uses one model to
forecast equity market returns, one model to forecast currency returns and 22
separate models to forecast individual equity security returns in 22 different
countries. Despite this variety, all Multifactor Models incorporate common
variables covering measures of value, growth, momentum and risk (e.g.,
book/price ratio, earnings/price ratio, price momentum, price volatility,
consensus growth forecasts, earnings estimate revisions, earnings stability,
and, in the case of models for the CORE International Equity Fund, currency
momentum and country political risk ratings). All of the factors used in the
Multifactor Models have been shown to significantly impact the performance of
the securities, currencies and markets they were designed to forecast.
 
  The weightings assigned to the factors in the Multifactor Model used by the
CORE U.S. Equity Funds are derived using a statistical formulation that
considers each factor's historical performance in different market
environments. As such, the U.S. Multifactor Model is designed to evaluate each
security using only the factors that are statistically related to returns in
the anticipated market environment. Because they include many disparate
factors, the Funds' investment advisers believe that all the Multifactor
Models are broader in scope and provide a more thorough evaluation than most
conventional, quantitative models. Securities and markets ranked highest by
the relevant Multifactor Model do not have one dominant investment
characteristic; rather, they possess an attractive combination of investment
characteristics.
 
  Research Department. In assigning ratings to equity securities, the Research
Department uses a four category rating system ranging from "recommended for
purchase" to "likely to under perform." The ratings reflect the analyst's
judgment as to the investment results of a specific security and incorporate
economic outlook, valuation, risk and a variety of other factors.
 
  By employing both a quantitative (i.e., the Multifactor Models) and a
qualitative (i.e., research enhanced) method of selecting securities, each
CORE Fund seeks to capitalize on the strengths of each discipline.
 
  ACTIVELY MANAGED INTERNATIONAL FUNDS. The International Equity, Japanese
Equity, International Small Cap, Emerging Markets Equity and Asia Growth Funds
are managed using an active international approach,
 
                                      16
<PAGE>
 
which utilizes a consistent process of stock selection undertaken by portfolio
management teams located within each of the major investment regions,
including Europe, Japan, Asia and the United States. In selecting securities,
the investment adviser uses a long-term, bottom-up strategy based on first-
hand fundamental research that is designed to give broad exposure to the
available opportunities while seeking to add return primarily through stock
selection. Equity securities for these Funds are evaluated based on three key
factors--the business, the management and the valuation. The investment
adviser ordinarily seeks securities that have, in the investment adviser's
opinion, superior earnings growth potential, sustainable franchise value with
management attuned to creating shareholder value and relatively discounted
valuations. In addition, the investment adviser uses a multi-factor risk model
which seeks to assure that deviations from the benchmark are justifiable.
 
  REAL ESTATE SECURITIES FUND. The investment strategy of the Real Estate
Securities Fund is based on the premise that property market fundamentals are
the primary determinant of growth underlying the success of companies in the
real estate industry. The Fund's research and investment process is designed
to identify those companies with strong property fundamentals and strong
management teams. This process is comprised of real estate market research and
securities analysis. The Fund's investment adviser will take into account
fundamental trends in underlying property markets as determined by proprietary
models, research of local real estate markets, earnings, cash flow growth and
stability, the relationship between asset values and market prices of the
securities and dividend payment history. The investment adviser will attempt
to purchase securities so that its underlying portfolio will be diversified
geographically and by property type.
 
UNDERLYING FIXED-INCOME FUNDS
 
  The investment advisers of the Underlying Fixed-Income Funds may, in
accordance with the respective Funds' investment objectives and policies,
purchase all types of fixed-income securities, including senior and
subordinated corporate debt obligations (such as bonds, debentures, notes and
commercial paper), convertible and non-convertible corporate debt obligations,
loan participations and preferred stock.
 
  As stated above, each Underlying Fixed-Income Fund has policies relating to
its duration (or maturity in the case of the Financial Square Prime
Obligations Fund). A Fund's duration approximates its price sensitivity to
changes in interest rates. Maturity measures the time until final payment is
due; it takes no account of the pattern of a security's cash flows over time.
In computing portfolio duration, an Underlying Fund will estimate the duration
of obligations that are subject to prepayment or redemption by the issuer
taking into account the influence of interest rates on prepayments and coupon
flows. This method of computing duration is known as "option-adjusted"
duration. A Fund will not be limited as to its maximum weighted average
portfolio maturity or the maximum stated maturity with respect to individual
securities unless otherwise noted.
 
  Except for the Financial Square Prime Obligations Fund (which is subject to
more restrictive SEC regulations applicable to money market funds), an
Underlying Fixed-Income Fund will deem a security to have met its minimum
credit rating requirement if the security receives the minimum required long-
term rating (or the equivalent short-term credit rating) at the time of
purchase from at least one rating organization (including, but not limited to,
Standard & Poor's Ratings Group ("S&P") and Moody's Investors Service, Inc.
("Moody's")) even though it has been rated below the minimum rating by one or
more other rating organizations, or, if unrated by a rating organization, is
determined by the Fund's investment adviser to be of comparable quality. If a
security satisfies a Fund's minimum rating criteria at the time of purchase
and is subsequently downgraded below such rating, the Fund will not be
required to dispose of such security. If a downgrade occurs, the Fund's
investment adviser will consider what action, including the sale of such
security, is in the best interest of the Fund and its shareholders.
 
                                      17
<PAGE>
 
  The Underlying Funds may employ certain active management techniques to
manage their duration and term structure, to seek to hedge exposure to foreign
currencies and to seek to enhance returns. These techniques include (with
respect to one or more of the Funds), but are not limited to, the use of
financial futures contracts, option contracts (including options on futures),
forward foreign currency exchange contracts, currency options and futures,
currency, mortgage, credit and interest rate swaps and interest rate floors,
caps and collars. Currency and interest rate management techniques involve
risks different from those associated with investing solely in U.S. dollar-
denominated fixed-income securities of U.S. issuers. Certain of the Funds may
invest in custodial receipts, municipal securities and convertible securities.
The Funds may also employ other investment techniques to seek to enhance
returns, such as lending portfolio securities and entering into mortgage
dollar rolls, repurchase agreements, reverse repurchase agreements and other
investment practices, as described in Appendix A to this Prospectus.
 
 
                                  MANAGEMENT
 
TRUSTEES AND OFFICERS
 
  The Trustees are responsible for deciding matters of general policy and
reviewing the actions of the Investment Adviser, Distributor and transfer
agent. The officers of the Trust conduct and supervise the Portfolios' daily
business operations. The Additional Statement contains information as to the
identity of, and other information about, the Trustees and officers of the
Trust.
 
INVESTMENT ADVISER
 
  INVESTMENT ADVISER. Goldman Sachs Asset Management, One New York Plaza, New
York, New York 10004, a separate operating division of Goldman Sachs, serves
as investment adviser to each Portfolio and, except as noted, to each
Underlying Fund. Goldman Sachs registered as an investment adviser in 1981.
Goldman Sachs Funds Management, L.P., One New York Plaza, New York, New York
10004, a Delaware limited partnership which is an affiliate of Goldman Sachs,
serves as the investment adviser to the CORE U.S. Equity, Capital Growth,
Adjustable Rate Government and Short Duration Government Funds. Goldman Sachs
Funds Management, L.P. registered as an investment adviser in 1990. Goldman
Sachs Asset Management International, 133 Peterborough Court, London EC4A 2BB,
England, an affiliate of Goldman Sachs, serves as the investment adviser to
the International Equity, Japanese Equity, International Small Cap, Emerging
Markets Equity, Asia Growth and Global Income Funds. Goldman Sachs Asset
Management International became a member of the Investment Management
Regulatory Organization Limited in 1990 and registered as an investment
adviser in 1991. The Goldman Sachs Group, L.P., which controls the Investment
Adviser, has announced that it will pursue an initial public offering of the
firm during the fourth quarter of 1998; if the public offering is consummated,
The Goldman Sachs Group, L.P. will merge into the new public company, which
will be called The Goldman Sachs Group, Inc. As of July 24, 1998, GSAM,
together with its affiliates, acted as investment adviser or distributor for
assets in excess of $168 billion.
 
  Under an Asset Allocation Management Agreement ("Management Agreement") with
each Portfolio, the Investment Adviser, subject to the general supervision of
the Trustees, provides day-to-day advice as to each Portfolio's investment
transactions, including determinations concerning changes to (a) the
Underlying Funds in which the Portfolios may invest and (b) the percentage
range of assets of any Portfolio that may be invested in the Underlying Equity
Funds and the Underlying Fixed-Income Funds as separate groups. Goldman Sachs
has agreed to permit the Portfolios to use the name "Goldman Sachs" or a
derivative thereof as part of each Portfolio's name for as long as a
Portfolio's Management Agreement is in effect.
 
 
                                      18
<PAGE>
 
  Under the Management Agreement, the Investment Adviser also: (a) supervises
all non-advisory operations of each Portfolio; (b) provides personnel to
perform such executive, administrative and clerical services as are reasonably
necessary to provide effective administration of each Portfolio; (c) at each
Portfolio's expense arranges for (i) the preparation of all required tax
returns, (ii) the preparation and submission of reports to existing
shareholders, (iii) the periodic updating of prospectuses and Additional
Statements and (iv) the preparation of reports to be filed with the SEC and
other regulatory authorities; (d) maintains each Portfolio's records; and (e)
provides office space and all necessary office equipment and services.
 
FUND MANAGERS
 
<TABLE>
<S>                      <C>             <C>
                         YEARS PRIMARILY
     NAME AND TITLE        RESPONSIBLE          FIVE YEAR EMPLOYMENT HISTORY
 ----------------------- --------------- -------------------------------------------
 Mark M. Carhart, Ph.D.,   Since 1998    Mr. Carhart joined the Investment Adviser
  CFA                                    in 1997 as a member of the Quantitative
  Vice President, Co-                    Research and Risk Management team. From
  Head Quantitative                      August 1995 to September 1997, he was
  Research and Senior                    Assistant Professor of Finance at the
  Portfolio Manager                      Marshall School of Business at USC and a
                                         Senior Fellow of the Wharton Financial
                                         Institutions Center.
- ------------------------------------------------------------------------------------
 Raymond J. Iwanowski      Since 1998    Mr. Iwanowski joined the Investment Adviser
  Vice President, Co-                    in 1998. Prior to joining the Investment
  Head Quantitative                      Adviser, he spent three years at Salomon
  Research and Senior                    Brothers, where he was a Vice President and
  Portfolio Manager                      head of the Fixed Derivatives Client
                                         Research group.
- ------------------------------------------------------------------------------------
 Neil Chriss, Ph.D.        Since 1998    Mr. Chriss joined the Investment Adviser in
  Vice President and                     1998. From 1996 to 1998, he worked in the
  Portfolio Manager                      equity division of Morgan Stanley Dean
                                         Witter. From 1994 to 1996, he was a post-
                                         doctoral fellow in the Mathematics
                                         Department of Harvard University.
- ------------------------------------------------------------------------------------
 Georgio DeSantis, Ph.D.   Since 1998    Mr. DeSantis joined the Investment Adviser
  Vice President and                     in 1998. From 1992 to 1998, he was
  Portfolio Manager                      Assistant Professor of Finance and Business
                                         Economics at the Marshall School of
                                         Business at USC.
- ------------------------------------------------------------------------------------
 William J. Fallon,        Since 1998    Mr. Fallon joined the Investment Adviser in
  Ph.D.                                  1998. From 1996 to 1998, he worked in the
  Vice President and                     Firmwide Risk Group of Goldman, Sachs & Co.
  Portfolio Manager                      From 1991 to 1996, he attended Columbia
                                         University, where he earned a Ph.D. in
                                         Finance.
- ------------------------------------------------------------------------------------
 Guang-Liang He, Ph.D.     Since 1998    Mr. He joined the Investment Adviser in
  Vice President and                     1998. In 1997, he worked in the Firmwide
  Portfolio Manager                      Risk Group of Goldman, Sachs & Co. From
                                         1992 to 1997, he worked at Quantitative
                                         Financial Strategies, Inc.
</TABLE>
 
 
  It is the responsibility of the investment adviser of each Underlying Fund
to make the investment decisions for that Fund and to place the purchase and
sale orders for the Fund's portfolio transactions in U.S. and foreign markets.
Such orders may be directed to any broker including, to the extent and in the
manner permitted by applicable law, Goldman Sachs or its affiliates. In
effecting purchases and sales of portfolio securities for a Fund, its
investment adviser will seek the best price and execution of the Fund's
orders. In doing so, where two or more brokers or dealers offer comparable
prices and execution for a particular trade, consideration may be given to
whether the broker or dealer provides investment research or brokerage
services or sells Shares of any Underlying Fund. See the Additional Statement
for a further description of the investment adviser's brokerage allocation
practices.
 
  As compensation for its services and assumption of certain expenses pursuant
to the Management Agreement, GSAM is entitled to a fee, computed daily and
payable monthly, at the annual rate equal to 0.35% of each Portfolio's average
daily net assets. The Investment Adviser has voluntarily agreed to waive 0.20%
of this fee. The Investment Adviser may discontinue or modify its voluntary
waiver in the future in its discretion.
 
                                      19
<PAGE>
 
  The Investment Adviser has voluntarily agreed to reduce or limit certain
"Other Expenses" of the Portfolios (excluding management fees, transfer agency
fees, taxes, interest, brokerage fees, and litigation, indemnification and
other extraordinary expenses) to the extent such expenses exceed 0.00% per
annum of a Portfolio's average daily net assets. Such reductions or limits, if
any, may be discontinued or modified by the Investment Adviser in its
discretion at any time.
 
  In addition, each Portfolio, as a shareholder in the Underlying Funds, will
indirectly bear its proportionate share of any investment management fees and
other expenses paid by the Underlying Funds. The contractual management fee
payable to GSAM and/or its affiliates by each of the Underlying Funds in which
the Portfolios may invest is set forth below under "Expenses."
 
  In performing its investment advisory services, the investment adviser of an
Underlying Fund, while remaining ultimately responsible for the management of
the Fund, may rely upon the asset management division of its Singapore and
Tokyo affiliates for portfolio decisions and management with respect to
certain portfolio securities and is able to draw upon the research and
expertise of its other affiliate offices. In addition, the investment adviser
will have access to the research of, and proprietary technical models
developed by, Goldman Sachs and may apply quantitative and qualitative
analysis in determining the appropriate allocations among the categories of
issuers and types of securities.
 
  ACTIVITIES OF GOLDMAN SACHS AND ITS AFFILIATES AND OTHER ACCOUNTS MANAGED BY
GOLDMAN SACHS. The involvement of the Funds' investment advisers, Goldman
Sachs and their affiliates in the management of, or their interest in, other
accounts and other activities of Goldman Sachs may present conflicts of
interest with respect to an Underlying Fund or limit the investment activities
of an Underlying Fund. Goldman Sachs and its affiliates engage in proprietary
trading and advise accounts and funds which have investment objectives similar
to those of the Underlying Funds and/or which engage in and compete for
transactions in the same type of securities, currencies and instruments.
Goldman Sachs and its affiliates will not have any obligation to make
available any information regarding their proprietary activities or
strategies, or the activities or strategies used for other accounts managed by
them, for the benefit of the management of the Underlying Funds. The results
of the investment activities of an Underlying Fund, therefore, may differ from
those of Goldman Sachs and its affiliates and it is possible that the
Portfolios and the Underlying Funds could sustain losses during periods in
which Goldman Sachs and its affiliates and other accounts achieve significant
profits on their trading for proprietary or other accounts. In addition, the
Underlying Funds may, from time to time, enter into transactions in which
other clients of Goldman Sachs have an adverse interest. From time to time,
the activities of an Underlying Fund may be limited because of regulatory
restrictions applicable to Goldman Sachs and its affiliates, and/or their
internal policies designed to comply with such restrictions. See "Management--
Activities of Goldman Sachs and its Affiliates and Other Accounts Managed by
Goldman Sachs" in the Additional Statement for further information.
 
DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs, 85 Broad Street, New York, New York 10004, serves as the
exclusive Distributor of each Portfolio's Shares. Goldman Sachs, 4900 Sears
Tower, Chicago, Illinois 60606, also serves as each Portfolio's transfer agent
(the "Transfer Agent") and as such performs various shareholder servicing
functions. As compensation for the services rendered to each Portfolio by
Goldman Sachs (as Transfer Agent), Goldman Sachs is entitled to receive a
transfer agency fee with respect to each Portfolio's Institutional Shares
equal, on an annual basis, to 0.04% of average daily net assets. Shareholders
with inquiries regarding a Portfolio should contact Goldman Sachs (as Transfer
Agent) at the address or the telephone number set forth on the back cover page
of this Prospectus.
 
                                      20
<PAGE>
 
  From time to time, Goldman Sachs or any of its affiliates may purchase and
hold Shares of the Underlying Funds or Portfolios. Goldman Sachs reserves the
right to redeem at any time some or all of the Shares acquired for its own
account.
 
YEAR 2000
 
  Many computer systems were designed using only two digits to signify the
year (for example, "98" for "1998"). On January 1, 2000, if these computer
systems are not corrected, they may incorrectly interpret "00" as the year
"1900" rather than the year "2000," leading to computer shutdowns or errors
(commonly known as the "Year 2000 Problem"). To the extent these systems
conduct forward-looking calculations, these computer problems may occur prior
to January 1, 2000. Like other investment companies and financial and business
organizations, the Portfolios could be adversely affected in their ability to
process securities trades, price securities, provide shareholder account
services and otherwise conduct normal business operations if the computer
systems used by the Investment Adviser or other Portfolio service providers do
not adequately address this problem in a timely manner. The Investment Adviser
has established a dedicated group to analyze these issues and to implement the
systems modifications necessary to prepare for the Year 2000 Problem.
Currently, the Investment Adviser does not anticipate that the transition to
the 21st Century will have any material impact on its ability to continue to
service the Portfolios at current levels. In addition, the Investment Adviser
has sought assurances from the Portfolios' other service providers that they
are taking the steps necessary so that they do not experience Year 2000
Problems, and the Investment Adviser will continue to monitor the situation.
At this time, however, no assurance can be given that the actions taken by the
Investment Adviser and the Portfolios' other service providers will be
sufficient to avoid any adverse effect on the Portfolios due to the Year 2000
Problem.
 
 
                                   EXPENSES
 
 
  The Portfolios are responsible for the payment of their expenses. The
expenses include, without limitation, asset allocation; custodial and transfer
agency fees; brokerage fees and commissions; filing fees for the registration
or qualification of the Portfolios' Shares under federal or state securities
laws; organizational expenses; fees and expenses incurred in connection with
membership in investment company organizations; taxes; interest; costs of
liability insurance; fidelity bonds or indemnification; any costs, expenses or
losses arising out of any liability of, or claim for damages or other relief
asserted against, the Portfolios for violation of any law; legal and auditing
fees and expenses (including the cost of legal and certain accounting services
rendered by employees of the Investment Adviser and its affiliates with
respect to the Portfolios); expenses of preparing and setting in type
prospectuses, Additional Statements, proxy material, financial reports and
notices and the printing and distributing of the same to shareholders and
regulatory authorities; compensation and expenses of the Trust's "non-
interested" Trustees and extraordinary expenses, if any, incurred by the
Trust.
 
  The expenses associated with investing in a "fund of funds," such as the
Portfolios, are generally higher than those of investment companies that do
not invest in other mutual funds. These increased expenses stem from the fact
that investors must indirectly pay a portion of the operating costs of the
Underlying Funds. The structure of the Portfolios will, however, reduce any
layering of costs in the following manner: (a) any fees charged to the
Portfolios under the Management Agreement are for services that are in
addition to, and not duplicative of, services provided under any Underlying
Fund's management agreement; (b) the Portfolios pay no front-end or contingent
deferred sales charges in connection with the purchase or redemption of Shares
of the Underlying Funds; (c) the Portfolios do not pay any sales charges,
distribution-related fees or service fees related
 
                                      21
<PAGE>
 
to the Shares of the Underlying Funds; (d) custodial and other fees charged by
both the Portfolios and the Underlying Funds are not redundant inasmuch as
distinct services are being provided at each level; and (e) any additional
incremental cost incurred by investing in the Portfolios is in return for a
substantial investment management service, namely the initial and ongoing
asset allocation of investments made in the Underlying Funds, and provision of
meaningful additional diversification benefits.
 
  The following chart shows the total operating expense ratios (management fee
plus other operating expenses) of Institutional Shares of each Underlying Fund
for the Fund's most recent fiscal year (except as indicated). In addition, the
following chart shows the contractual investment management fees payable to
GSAM and its affiliates by the Underlying Funds (in each case as an annualized
percentage of the Fund's average net assets). Absent voluntary fee waivers
and/or expense reimbursements, which may be discontinued at any time, the
total operating expense ratios of certain Underlying Funds would be higher.
 
<TABLE>
<CAPTION>
                                                  CONTRACTUAL   TOTAL OPERATING
    UNDERLYING FUNDS                             MANAGEMENT FEE EXPENSE RATIO*
    ----------------                             -------------- ---------------
<S>                                              <C>            <C>
Short Duration Government Fund..................      0.50%          0.54%
Adjustable Rate Government Fund.................      0.40%          0.49%
Core Fixed-Income Fund..........................      0.40%          0.54%
Government Income Fund..........................      0.65%          0.58%
Global Income Fund..............................      0.90%          0.69%
High Yield Fund.................................      0.70%          0.76%
Growth & Income Fund............................      0.70%          0.79%
CORE U.S. Equity Fund...........................      0.75%          0.74%
CORE Large Cap Growth Fund......................      0.75%          0.64%
CORE Small Cap Equity Fund......................      0.85%          0.93%
Capital Growth Fund.............................      1.00%          1.04%
CORE International Equity Fund..................      0.85%          1.01%
Mid Cap Equity Fund.............................      0.75%          0.89%
Small Cap Value Fund............................      1.00%          1.10%
International Equity Fund.......................      1.00%          1.14%
Japanese Equity Fund............................      1.00%          1.05%
International Small Cap Fund....................      1.20%          1.40%
Emerging Markets Equity Fund....................      1.20%          1.39%
Asia Growth Fund................................      1.00%          1.20%
Real Estate Securities Fund.....................      1.00%          1.04%
Financial Square Prime Obligations Money Market
 Fund...........................................     0.205%          0.18%
</TABLE>
- --------
* Operating expenses of Institutional Shares for the Underlying Funds have
  been restated to reflect fees and expenses in effect as of September 1,
  1998.
 
                                      22
<PAGE>
 
 
                                NET ASSET VALUE
 
 
  The NAV per Share of each class of a Portfolio is calculated by the
Portfolio's custodian as of the close of regular trading on the New York Stock
Exchange (which is normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m.
New York time), on each Business Day (as such term is defined under
"Additional Information"). NAV per Share of each class is calculated by
determining the net assets attributed to each class and dividing by the number
of outstanding Shares of that class. Portfolio securities are valued based on
market quotations or, if accurate quotations are not readily available, at
fair value as determined in good faith under procedures established by the
Trustees.
 
 
                            PERFORMANCE INFORMATION
 
 
  From time to time each Portfolio may publish average annual total return,
yield and distribution rates in advertisements and communications to
shareholders or prospective investors. Average annual total return is
determined by computing the average annual percentage change in value of
$1,000 invested at the maximum public offering price for specified periods
ending with the most recent calendar quarter, assuming reinvestment of all
dividends and distributions at NAV. The total return calculation assumes a
complete redemption of the investment at the end of the relevant period. Each
Portfolio may also from time to time advertise total return on a cumulative,
average, year-by-year or other basis for various specified periods by means of
quotations, charts, graphs or schedules. In addition to the above, each
Portfolio may from time to time advertise its performance relative to certain
averages, performance rankings, indices, other information prepared by
recognized mutual fund statistical services and investments for which reliable
performance information is available.
 
  The Portfolios compute their yield by dividing net investment income earned
during a recent thirty-day period by the product of the average daily number
of Shares outstanding and entitled to receive dividends during the period and
the maximum offering price per share on the last day of the relevant period.
The results are compounded on a bond equivalent (semi-annual) basis and then
annualized. Net investment income per share is equal to the dividends and
interest earned during the period, reduced by accrued expenses for the period.
The calculation of net investment income for these purposes may differ from
the net investment income determined for accounting purposes. The Portfolios'
quotations of distribution rate are calculated by annualizing the most recent
distribution of net investment income for a monthly, quarterly or other
relevant period and dividing this amount by the NAV per Share on the last day
of the period for which the distribution rate is being calculated.
 
  Each Portfolio's total return, yield and distribution rate will be
calculated separately for each class of Shares in existence. Because each
class of Shares may be subject to different expenses, the total return, yield
and distribution rate calculations with respect to each class of Shares for
the same period will differ. See "Shares of the Trust."
 
  Each Portfolio's performance quotations do not reflect any fees charged by a
Service Organization to its customer accounts in connection with investments
in the Portfolios. The investment results of a Portfolio will fluctuate over
time and any presentation of investment results for any prior period should
not be considered a representation of what an investment may earn or what the
Portfolio's performance may be in any future period. In addition to
information provided in shareholder reports, the Portfolios may, in their
discretion, from time to time make a list of their holdings available to
investors upon request.
 
                                      23
<PAGE>
 
 
                              SHARES OF THE TRUST
 
 
  Each Portfolio is classified as "diversified" under the Investment Company
Act of 1940, as amended (the "1940 Act"). Each Portfolio is a series of
Goldman Sachs Trust, which was formed under the laws of the State of Delaware
on January 28, 1997. The Trustees have authority under the Trust's Declaration
of Trust to create and classify Shares of beneficial interests in separate
series, without further action by shareholders. Additional series may be added
in the future. The Trustees also have authority to classify and reclassify any
series or portfolio of Shares into one or more classes. Information about the
Trust's other series and classes is contained in separate prospectuses.
 
  When issued, Shares are fully paid and non-assessable. In the event of
liquidation, shareholders of each class are entitled to share pro rata in the
net assets of the applicable Portfolio available for distribution to such
shareholders. All Shares are freely transferable and have no preemptive,
subscription or conversion rights. Shareholders are entitled to one vote per
Share, provided that, at the option of the Trustees, shareholders will be
entitled to a number of votes based upon the NAVs represented by their Shares.
 
  The Trust does not intend to hold annual meetings of shareholders. However,
recordholders may, under certain circumstances, as permitted by the Act,
communicate with other shareholders in connection with requiring a special
meeting of shareholders. The Trustees will call a special meeting of
shareholders for the purpose of electing Trustees if, at any time, less than a
majority of Trustees holding office at the time were elected by shareholders.
 
  In the interest of economy and convenience, the Trust does not issue
certificates representing the Portfolios' Shares. Instead, the Transfer Agent
maintains a record of each shareholder's ownership. Each shareholder receives
confirmation of purchase and redemption orders from the Transfer Agent.
Portfolio Shares and any dividends and distributions paid by a Portfolio are
reflected in account statements from the Transfer Agent.
 
 
                                   TAXATION
 
 
FEDERAL TAXES
 
  Each Portfolio is treated as a separate entity for tax purposes. Each
Portfolio intends to elect to be treated as a regulated investment company and
qualify for such treatment for each taxable year under Subchapter M of the
Internal Revenue Code of 1986, as amended (the "Code"). To qualify as such, a
Portfolio must satisfy certain requirements relating to the sources of its
income, diversification of its assets and distribution of its income to
shareholders. As a regulated investment company, a Portfolio will not be
subject to federal income or excise tax on any net investment income and net
realized capital gains that are distributed to its shareholders in accordance
with certain timing requirements of the Code.
 
  Dividends paid by a Portfolio from net investment income, certain net
realized foreign exchange gains, the excess of net short-term capital gain
over net long-term capital loss and original issue discount or market discount
income will be taxable to its shareholders as ordinary income. Distributions
out of the net capital gain (the excess of net long-term capital gain over net
short-term capital loss), if any, of a Portfolio will be taxed to shareholders
as long-term capital gains, regardless of the length of time a shareholder has
held his or her Shares or whether such gain was reflected in the price paid
for the Shares. These tax consequences will apply whether distributions
 
                                      24
<PAGE>
 
are received in cash or reinvested in Shares. A Portfolio's dividends that are
paid to its corporate shareholders and are attributable to qualifying
dividends such Portfolio or an Underlying Fund receives from U.S. domestic
corporations may be eligible, in the hands of such corporate shareholders, for
the corporate dividends-received deduction, subject to certain holding period
requirements and debt financing limitations under the Code. A portion of each
Portfolio's dividends may generally qualify, in the hands of corporate
shareholders, for the corporate dividends-received deduction. Certain
distributions paid by a Portfolio in January of a given year may be taxable to
shareholders as if received the prior December 31. Shareholders will be
informed annually about the amount and character of distributions received
from the Portfolios for federal income tax purposes.
 
  Investors should consider the tax implications of buying Shares immediately
prior to a distribution. Investors who purchase Shares shortly before the
record date for a distribution will pay a per share price that includes the
value of the anticipated distribution and will be taxed on the distribution
even though the distribution represents a return of a portion of the purchase
price.
 
  Redemptions and exchanges of Shares are taxable events.
 
  Individuals and certain other classes of shareholders may be subject to 31%
backup withholding of federal income tax on distributions, redemptions and
exchanges if they fail to furnish their correct taxpayer identification number
and certain certifications required by the Internal Revenue Service or if they
are otherwise subject to backup withholding. Individuals, corporations and
other shareholders that are not U.S. persons under the Code are subject to
different tax rules and may be subject to nonresident alien withholding at the
rate of 30% (or a lower rate provided by an applicable tax treaty, if any) on
amounts treated as ordinary dividends from the Portfolios.
 
  Each Portfolio may be subject to foreign withholding or other foreign taxes
on income or gain from certain foreign securities. In general, the Portfolios
do not anticipate that they will be eligible to pass any foreign tax credits
through to their shareholders; however, the Portfolios may deduct these taxes
in computing their taxable income, if any.
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local
or foreign taxes on payments received from the Portfolios. A state income (and
possibly local income and/or intangible property) tax exemption may be
generally available to the extent (if any) a Portfolio's distributions are
derived from interest on (or, in the case of intangible property taxes, the
value of its assets is attributable to) certain U.S. Government obligations,
provided in some states that certain thresholds for holdings of such
obligations and/or reporting requirements are satisfied. For a further
discussion of certain tax consequences of investing in Shares of the
Portfolios, see "Taxation" in the Additional Statement. Shareholders are urged
to consult their own tax advisers regarding specific questions as to federal,
state and local taxes as well as to any foreign taxes.
 
 
                            ADDITIONAL INFORMATION
 
 
  As used in this Prospectus, the term "Business Day" means any day the New
York Stock Exchange is open for trading, which is Monday through Friday except
for holidays. The New York Stock Exchange is closed on the following holidays:
New Year's Day, Martin Luther King, Jr. Day, Presidents' Day (observed), Good
Friday, Memorial Day (observed), Independence Day, Labor Day, Thanksgiving Day
and Christmas Day.
 
                                      25
<PAGE>
 
 
                            REPORTS TO SHAREHOLDERS
 
 
  Recordholders of Institutional Shares of the Portfolios will receive an
annual report containing audited financial statements and a semiannual report.
To eliminate unnecessary duplication, only one copy of the annual and semi-
annual reports may be sent to shareholders with the same mailing address.
Shareholders who desire a duplicate copy of such reports to be mailed to their
residence should contact Goldman Sachs at 800-621-2550. Each recordholder of
Institutional Shares will also be provided with a printed confirmation for
each transaction in its account and a quarterly account statement. A year-to-
date statement for any account will be provided upon request made to Goldman
Sachs. The Portfolios generally do not provide sub-accounting services with
respect to beneficial ownership of Institutional Shares.
 
 
                                   DIVIDENDS
 
 
  Each dividend from net investment income and capital gain distributions, if
any, declared by a Portfolio on its outstanding Institutional Shares will, at
the election of each shareholder, be paid (i) in cash or (ii) in additional
Institutional Shares of such Portfolio. This election should initially be made
on a shareholder's Account Information Form and may be changed upon written
notice to Goldman Sachs at any time prior to the record date for a particular
dividend or distribution. If no election is made, all dividends from net
investment income and capital gain distributions will be reinvested in
Institutional Shares of the applicable Portfolio.
 
  The election to reinvest dividends and distributions paid by a Portfolio in
additional Institutional Shares of the Portfolio will not affect the tax
treatment of such dividends and distributions, which will be treated as
received by the shareholder and then used to purchase Institutional Shares of
a Portfolio.
 
  Each Portfolio intends that all or substantially all of its net investment
income and net capital gains, after reduction by available capital losses,
including any capital losses carried forward from prior years, will be
declared as dividends for each taxable year. The Income Strategy Portfolio
will pay dividends from net investment income monthly. The Growth and Income
Strategy Portfolio and Growth Strategy Portfolio will each pay dividends from
net investment income quarterly. The Aggressive Growth Strategy Portfolio will
pay dividends from net investment income annually. Each Portfolio will pay
dividends from net realized capital gains, reduced by available capital
losses, at least annually. From time to time, a portion of a Portfolio's
dividends may constitute a return of capital.
 
  At the time of an investor's purchase of Shares of a Portfolio a portion of
the NAV per Share may be represented by undistributed income of the Portfolio
or realized or unrealized appreciation of the Portfolio's investments.
Therefore, subsequent distributions on such Shares from such income or
realized appreciation may be taxable to the investor even if the NAV of the
investor's Shares is, as a result of the distributions, reduced below the cost
of such Shares and the distributions (or portions thereof) represent a return
of a portion of the purchase price.
 
 
                       PURCHASE OF INSTITUTIONAL SHARES
 
 
  Institutional Shares may be purchased on any Business Day at the NAV per
Share next determined after receipt of an order. No sales load will be
charged. Currently, each Portfolio's NAV is determined as of the close of
regular trading on the New York Stock Exchange (which is normally, but not
always, 3:00 p.m. Chicago time,
 
                                      26
<PAGE>
 
4:00 p.m. New York time), as described under "Net Asset Value." Purchases of
Institutional Shares of the Funds must be settled within three (3) Business
Days of the receipt of a complete purchase order. Payment of the proceeds of
redemption of Shares purchased by check may be delayed for a period of time as
described under "Redemption of Institutional Shares."
 
  Prior to making an initial investment in a Portfolio, an investor must open
an account with a Portfolio by furnishing necessary information to the
Portfolio or Goldman Sachs. An Account Information Form, a copy of which is
attached to this Prospectus, should be used to open such an account.
Subsequent purchases may be made in the manner set forth below.
 
PURCHASE PROCEDURES
 
  Purchases of Institutional Shares may be made by qualified investors by
placing an order with Goldman Sachs at 800-621-2550 and either wiring federal
funds to State Street Bank and Trust Company ("State Street") or initiating an
ACH transfer. Purchases may also be made by check (except that the Trust will
not accept a check drawn on a foreign bank or a third party check) or Federal
Reserve draft made payable to "Goldman Sachs Asset Allocation Portfolios--Name
of Portfolio and Class of Shares" and should be directed to "Goldman Sachs
Asset Allocation Portfolios--Name of Portfolio and Class of Shares," c/o
National Financial Data Services, Inc. ("NFDS"), P.O. Box 419711, Kansas City,
MO 64141-6711.
 
MINIMUM INITIAL INVESTMENTS
 
  Institutional Shares of the Portfolio are offered to: (a) banks, trust
companies or other types of depository institutions investing for their own
account or on behalf of their clients; (b) pension and profit sharing plans,
pension funds and other company-sponsored benefit plans; (c) any state,
county, city or any instrumentality, department, authority or agency thereof;
(d) corporations and other for-profit business organizations with assets of at
least $100 million or publicly traded securities outstanding; (e) "wrap"
accounts for the benefit of clients of broker-dealers, financial institutions
or financial planners, provided that they have entered into an agreement with
GSAM specifying aggregate minimums and certain operating policies and
standards; and (f) registered investing for accounts for which they receive
asset-based fees. With respect to these investors, the minimum initial
investment is $1,000,000 in Institutional Shares of a Portfolio alone or in
combination with other assets under the management of GSAM and its affiliates.
 
  The minimum initial investment in Institutional Shares for (a) individual
investors; (b) qualified non-profit organizations, charitable trusts,
foundations and endowments; and (c) accounts over which GSAM or its advisory
affiliates have investment discretion is $10,000,000.
 
  The foregoing minimum investment requirements may be waived at the
discretion of the Trust's officers. In addition, the minimum investment
requirement may be waived for current and former officers, partners, directors
or employees of Goldman Sachs or any of its affiliates or for other investors
at the discretion of the Trust's officers. No minimum amount is required for
subsequent investments.
 
OTHER PURCHASE INFORMATION
 
  The Trust may authorize certain institutions (including banks, trust
companies, brokers and investment advisers) that provide recordkeeping,
reporting and processing services to their customers to accept on the Trust's
behalf orders placed by or on behalf of such customers and, if approved by the
Trust, to designate other
 
                                      27
<PAGE>
 
intermediaries to accept such orders. In these cases, a Portfolio will be
deemed to have received an order in proper form by or on behalf of a customer
when the order is accepted by the authorized institution or intermediary on a
Business Day, and the order will be priced at a Portfolio's NAV per Share next
determined after such acceptance. The institution or intermediary will be
responsible for transmitting accepted orders to the Portfolios within the
period agreed upon by them. A customer should contact an institution to learn
whether it is authorized to accept orders for the Trust. Such institutions may
receive payments from the Portfolios or Goldman Sachs for the services
provided by them with respect to the Portfolios' Institutional Shares. These
payments may be in addition to other servicing and/or sub-transfer agency
payments borne by the Portfolios and their share classes.
 
  The Investment Adviser, Distributor, and/or their affiliates also pay
additional compensation from time to time, out of their assets and not as an
additional charge to the Portfolios, to selected institutions (including
banks, trust companies, brokers and investment advisers) and other persons in
connection with the sale of Shares of the Portfolios, the Underlying Funds and
other investment portfolios of the Trust (such as additional payments based on
new sales, amounts exceeding pre-established thresholds, or the length of time
customers' assets have remained in the Trust) and, subject to applicable NASD
regulations, contribute to various non-cash and cash incentive arrangements to
promote the sale of Shares, as well as sponsor various educational programs,
sales contests and/or promotions in which participants may receive
reimbursement of expenses, entertainment and prizes such as travel awards,
merchandise, cash, investment research and educational information and related
support materials. This additional compensation can vary among institutions
depending upon such factors as the amounts their customers have invested (or
may invest) in particular investment portfolios of the Trust, the particular
program involved, or the amount of reimbursable expenses. Additional
compensation based on sales may, but is currently not expected to, exceed
0.50% (annualized) of the amount invested. For further information, see the
Additional Statement.
 
  The Portfolios reserve the right to redeem the Institutional Shares of any
shareholder of record whose account balance is less than $50 as a result of
earlier redemptions. Such redemptions will not be implemented if the value of
a recordholder's account falls below the minimum account balance solely as a
result of market conditions. The Trust will give sixty (60) days' prior
written notice to Institutional recordholders whose Institutional Shares are
being redeemed to allow them to purchase sufficient additional Institutional
Shares of a Portfolio to avoid such redemption.
 
 
  The Portfolios and Goldman Sachs each reserve the right to reject any
specific purchase order (including exchanges) or to restrict purchases or
exchanges by a particular purchaser (or group of related purchasers). This may
occur, for example, when a purchaser or group of purchasers' pattern of
frequent purchases, sales or exchanges of Institutional Shares of a Portfolio
is evident, or if purchases, sales or exchanges are, or a subsequent abrupt
redemption might be, of a size that would disrupt management of a Portfolio.
 
  In the sole discretion of Goldman Sachs, a Portfolio may accept securities
instead of cash for the purchase of Shares of the Portfolio. Such purchases
will be permitted only if the Investment Adviser determines that any
securities acquired in this manner are consistent with the Portfolio's
investment objectives, restrictions and policies and are desirable investments
for the Portfolio.
 
                                      28
<PAGE>
 
 
                              EXCHANGE PRIVILEGE
 
 
  Institutional Shares of a Portfolio may be exchanged for (i) Institutional
Shares of any other mutual fund sponsored by Goldman Sachs and designated as
an eligible fund for this purpose and (ii) the corresponding class of any
Goldman Sachs Money Market Fund at the NAV next determined either by writing
to Goldman Sachs, Attention: Goldman Sachs Asset Allocation Portfolios--Name
of Portfolio and Class of Shares, c/o GSAM Shareholder Services, 4900 Sears
Tower, Chicago, Illinois 60606 or, if previously elected in the Portfolio's
Account Information Form, by telephone at 800-621-2550 (7:00 a.m. to 5:30 p.m.
Chicago time). A shareholder should obtain and read the prospectus relating to
any other Fund and its Shares and consider its investment objective, policies
and applicable fees before making an exchange. Under the telephone exchange
privilege, Institutional Shares may be exchanged among accounts with different
names, addresses and social security or other taxpayer identification numbers
only if the exchange request is in writing and is received in accordance with
the procedures set forth under "Redemption of Institutional Shares."
 
  In an effort to prevent unauthorized or fraudulent exchanges by telephone,
Goldman Sachs employs reasonable procedures as set forth under "Redemption of
Institutional Shares" to confirm that such instructions are genuine. In times
of drastic economic or market changes the telephone exchange privilege may be
difficult to implement. For federal income tax purposes, an exchange is
treated as a sale of the Institutional Shares surrendered in the exchange on
which an investor may realize a gain or loss, followed by a purchase of
Institutional Shares, or the corresponding class of any Goldman Sachs Money
Market Fund received in the exchange. Shareholders should consult their own
tax adviser concerning the tax consequences of an exchange.
 
  Each exchange which represents an initial investment in a Portfolio must
satisfy the minimum investment requirements of the Portfolio into which the
Institutional Shares are being exchanged, except that this requirement may be
waived at the discretion of the officers of the Trust. Exchanges are available
only in states where exchanges may legally be made. The exchange privilege may
be materially modified or withdrawn at any time on sixty (60) days' written
notice to Institutional Shareholders and is subject to certain limitations.
See "Purchase of Institutional Shares."
 
 
                      REDEMPTION OF INSTITUTIONAL SHARES
 
 
  The Portfolios will redeem their Institutional Shares upon request of a
recordholder of such Shares on any Business Day at the NAV next determined
after receipt of a request in proper form by Goldman Sachs from the
recordholder. (See "Purchase of Institutional Shares--Other Purchase
Information" for a description of limited situations where an institution or
other intermediary may be authorized to accept requests for the Trust.) If
Institutional Shares to be redeemed were recently purchased by check, a
Portfolio may delay transmittal of redemption proceeds until such time as it
has assured itself that good funds have been collected for the purchase of
such Institutional Shares. This may take up to fifteen (15) days. Redemption
requests may be made by a shareholder of record by writing to or calling the
Transfer Agent at the address or telephone number set forth on the back cover
of this Prospectus. A shareholder of record may request redemptions by
telephone if the optional telephone redemption privilege is elected on the
Account Information Form accompanying this Prospectus. It may be difficult to
implement redemptions by telephone in times of drastic economic or market
changes.
 
  In an effort to prevent unauthorized or fraudulent redemption or exchange
requests by telephone, Goldman Sachs employs reasonable procedures specified
by the Trust to confirm that such instructions are genuine. Among
 
                                      29
<PAGE>
 
other things, any redemption request that requires money to go to an account
or address other than that designated on the Account Information Form must be
in writing and signed by an authorized person designated on the Account
Information Form. Any such written request is also confirmed by telephone with
both the requesting party and the designated bank account to verify
instructions. Exchanges among accounts with different names, addresses and
social security or other taxpayer identification numbers must be in writing
and signed by an authorized person designated on the Account Information Form.
Other procedures may be implemented from time to time concerning telephone
redemptions and exchanges. If reasonable procedures are not implemented, the
Trust may be liable for any loss due to unauthorized or fraudulent
transactions. In all other cases, neither the Portfolios, the Trust nor
Goldman Sachs will be responsible for the authenticity of redemption or
exchange instructions received by telephone.
 
  Written requests for redemptions must be signed by each recordholder whose
signature has been guaranteed by a bank, a securities broker or dealer, a
credit union having authority to issue signature guarantees, a savings and
loan association, a building and loan association, a cooperative bank, a
federal savings bank or association, a national securities exchange, a
registered securities association or a clearing agency, provided that such
institution satisfies the standards established by the Transfer Agent.
 
  The Portfolios will arrange for the proceeds of redemptions effected by any
means to be wired as federal funds to the bank account designated in the
recordholder's Account Information Form or, if the recordholder elects in
writing, by check. Redemption proceeds paid by wire transfer will normally be
wired on the next Business Day in federal funds (for a total one-day delay),
but may be paid up to three (3) Business Days after receipt of a properly
executed redemption request. Wiring of redemption proceeds may be delayed one
additional Business Day if the Federal Reserve Bank is closed on the day
redemption proceeds would originally be wired. Redemption proceeds paid by
check will normally be mailed to the address of record within three (3)
Business Days of receipt of a properly executed redemption request. In order
to change the bank designated on the Account Information Form to receive
redemption proceeds, a written request must be received by the Transfer Agent.
This request must be signature guaranteed as set forth above. Further
documentation may be required for executors, trustees or corporations. Once
wire transfer instructions have been given by Goldman Sachs, neither the
Portfolios, the Trust nor Goldman Sachs assumes any further responsibility for
the performance of intermediaries or the recordholder's bank in the transfer
process. If a problem with such performance arises, the recordholder should
deal directly with such intermediaries or bank.
 
  Additional documentation regarding a redemption by any means may be required
to effect a redemption when deemed appropriate by Goldman Sachs. The request
for such redemption will not be considered to have been received in proper
form until such additional documentation has been received.
 
  Institutions (including banks, trust companies, brokers and investment
advisers) are responsible for the timely transmittal of redemption requests by
their customers to the Transfer Agent. In order to facilitate the timely
transmittal of redemption requests, these institutions have established times
by which redemption requests must be received by them. Additional
documentation may be required when deemed appropriate by an institution.
 
                                      30
<PAGE>
 
 
                                  APPENDIX A
 
  This Appendix describes various investments and investment techniques that
may be used by the Underlying Funds. This Appendix also describes certain
risks associated with these investments and techniques. Further information is
provided in the Additional Statement and in the prospectuses of the Underlying
Funds.
 
  As noted above, the Underlying Equity Funds invest primarily in common
stocks and other equity securities (including real estate investment trusts),
and the Underlying Fixed-Income Funds invest primarily in fixed income
securities. The Short Duration Government and Adjustable Rate Government Funds
invest in U.S. Government securities and related repurchase agreements, and
neither of these Funds, the Government Income Fund nor the Financial Square
Prime Obligations Fund makes foreign investments. The investments of the
Financial Square Prime Obligations Fund are limited by SEC regulations
applicable to money market funds as described in its prospectus, and do not
include many of the types of investments discussed below that are permitted
for the other Underlying Funds. With these exceptions, and the further
exceptions noted below, the following description applies generally to the
Underlying Funds.
 
                      (1) DESCRIPTION OF INVESTMENTS AND
                 INVESTMENT TECHNIQUES OF THE UNDERLYING FUNDS
 
CONVERTIBLE SECURITIES
 
  The Underlying Funds may invest in convertible securities, including debt
obligations and preferred stock of the issuer convertible at a stated exchange
rate into common stock of the issuer. Convertible securities generally offer
lower interest or dividend yields than non-convertible securities of similar
quality. As with all fixed-income securities, the market value of convertible
securities tends to decline as interest rates increase and, conversely, to
increase as interest rates decline. However, when the market price of the
common stock underlying a convertible security exceeds the conversion price,
the convertible security tends to reflect the market price of the underlying
common stock. As the market price of the underlying common stock declines, the
convertible security tends to trade increasingly on a yield basis, and thus
may not decline in price to the same extent as the underlying common stock.
Convertible securities rank senior to common stocks in an issuer's capital
structure and consequently entail less risk than the issuer's common stock. In
evaluating a convertible security, the investment adviser will give primary
emphasis to the attractiveness of the underlying common stock. The convertible
securities in which certain of the Underlying Funds invest are not subject to
any minimum rating criteria. Convertible debt securities are equity
investments for purposes of each Underlying Fund's investment policies.
 
PREFERRED STOCK, WARRANTS AND RIGHTS
 
  The Underlying Funds may invest in preferred stock, warrants and rights.
Preferred stocks are securities that represent an ownership interest providing
the holder with claims on the issuer's earnings and assets before common stock
owners but after bond owners. Unlike debt securities, the obligations of an
issuer of preferred stock, including dividend and other payment obligations,
may not typically be accelerated by the holders of such preferred stock on the
occurrence of an event of default (such as a covenant default or filing of a
bankruptcy petition) or other non-compliance by the issuer with the terms of
the preferred stock.
 
  Warrants and other rights are options to buy a stated number of shares of
common stock at a specified price during the life of the warrant. The holders
of warrants and rights have no voting rights, receive no dividends and have no
rights with respect to the assets of the issuer.
 
 
                                      A-1
<PAGE>
 
REAL ESTATE INVESTMENT TRUSTS ("REITS")
 
  The Real Estate Securities Fund expects to invest a substantial portion of
its total assets in REITs, which are pooled investment vehicles that invest
primarily in either real estate or real estate related loans. In addition, the
other Underlying Equity Funds may invest in REITs from time to time. REITs are
dependent upon the ability of the REITs' managers, and are subject to heavy
cash flow dependency, default by borrowers and the qualification of the REITs
under applicable regulatory requirements for favorable federal income tax
treatment. REITs are also subject to risks generally associated with
investments in real estate including possible declines in the value of real
estate, general and local economic conditions, environmental problems and
changes in interest rates. To the extent that assets underlying a REIT are
concentrated geographically, by property type or in certain other respects,
these risks may be heightened. Each Underlying Fund will indirectly bear its
proportionate share of any expenses, including management fees, paid by a REIT
in which it invests.
 
FOREIGN INVESTMENTS
 
  Foreign Securities. Certain of the Underlying Funds may invest in foreign
securities in accordance with their investment objectives and policies.
Investing in the securities of foreign issuers involves risks that are not
typically associated with investing in securities of domestic issuers quoted
in U.S. dollars. Such investments may be affected by changes in currency
rates, changes in foreign or U.S. laws or restrictions applicable to such
investments and in exchange control regulations (e.g., currency blockage). A
decline in the exchange rate of the currency (i.e., weakening of the currency
against the U.S. dollar) in which a portfolio security is quoted or
denominated relative to the U.S. dollar would reduce the value of the
portfolio security. The expected introduction of a single currency, the euro,
on January 1, 1999 for participating European nations in the Economic and
Monetary Union ("EU") presents unique uncertainties, including whether the
payment and operational systems of banks and other financial institutions will
be ready by the scheduled launch date; the creation of suitable clearing and
settlement payment systems for the new currency; the legal treatment of
certain outstanding financial contracts after January 1, 1999 that refer to
existing currencies rather than the euro; the establishment and maintenance of
exchange rates for currencies being converted into the euro and the euro; the
fluctuation of the euro relative to non-euro currencies during the transition
period from January 1, 1999 to December 31, 2000 and beyond; whether the
interest rate, tax and labor regimes of European countries participating in
the euro will converge over time; and whether the conversion of the currencies
of other EU countries such as the United Kingdom, Denmark and Greece into the
euro and the admission of other non-EU countries such as Poland, Latvia and
Lithuania as members of the EU may have an impact on the euro. These or other
factors, including political and economic risks, could cause market
disruptions before or after the introduction of the euro, and could adversely
affect the value of securities and foreign currencies held by the Underlying
Funds. Commissions on transactions in foreign securities may be higher than
those for similar transactions on domestic stock markets. In addition,
clearance and settlement procedures may be different in foreign countries and,
in certain markets, such procedures have been unable to keep pace with the
volume of securities transactions, thus making it difficult to conduct such
transactions.
 
  Foreign issuers are not generally subject to uniform accounting, auditing
and financial reporting standards comparable to those applicable to U.S.
issuers. There may be less publicly available information about a foreign
issuer than about a U.S. issuer. In addition, there is generally less
government regulation of foreign markets, companies and securities dealers
than in the United States. Foreign securities markets may have substantially
less volume than U.S. securities markets and securities of many foreign
issuers are less liquid and more volatile than securities of comparable
domestic issuers. Furthermore, with respect to certain foreign countries,
there is a possibility of nationalization, expropriation or confiscatory
taxation, imposition of withholding or other taxes on
 
                                      A-2
<PAGE>
 
dividend or interest payments (or, in some cases, capital gains), limitations
on the removal of funds or other assets of the Underlying Funds, political or
social instability or diplomatic developments which could affect investments
in those countries.
 
  Investments in ADRs, EDRs and GDRs. Investments in foreign securities may
take the form of sponsored and unsponsored American Depository Receipts
("ADRs"), Global Depository Receipts ("GDRs"), European Depository Receipts
("EDRs") or other similar instruments representing securities of foreign
issuers (together, "Depository Receipts"). ADRs represent the right to receive
securities of foreign issuers deposited in a domestic bank or a correspondent
bank. Prices of ADRs are quoted in U.S. dollars, and ADRs are traded in the
United States on exchanges or over-the-counter and are sponsored and issued by
domestic banks. EDRs and GDRs are receipts evidencing an arrangement with a
non-U.S. bank. EDRs and GDRs are not necessarily quoted in the same currency
as the underlying security. To the extent a Fund acquires Depository Receipts
through banks which do not have a contractual relationship with the foreign
issuer of the security underlying the Depository Receipts to issue and service
such Depository Receipts (unsponsored Depository Receipts), there may be an
increased possibility that the Underlying Fund would not become aware of and
be able to respond to corporate actions, such as stock splits or rights
offerings involving the foreign issuer, in a timely manner. In addition, the
lack of information may result in inefficiencies in the valuation of such
instruments. Investment in Depository Receipts does not eliminate all the
risks inherent in investing in securities of non-U.S. issuers. The market
value of Depository Receipts is dependent upon the market value of the
underlying securities and fluctuations in the relative value of the currencies
in which the Depository Receipts and the underlying securities are quoted.
However, by investing in Depository Receipts, such as ADRs, that are quoted in
U.S. dollars, the Underlying Funds may avoid currency risks during the
settlement period for purchases and sales.
  Foreign Currency Transactions. Because investment in foreign issuers will
usually involve currencies of foreign countries, and because certain
Underlying Funds may have currency exposure independent of their securities
positions, the value of the assets of the Underlying Fund as measured in U.S.
dollars will be affected by changes in foreign currency exchange rates. The
Underlying Fund may, to the extent it invests in foreign securities, purchase
or sell foreign currencies on a spot basis and may also purchase or sell
forward foreign currency exchange contracts for hedging purposes and to seek
to protect against anticipated changes in future foreign currency exchange
rates. In addition, the Core Fixed Income, Global Income, High Yield, CORE
International Equity, International Equity, Japanese Equity, International
Small Cap, Emerging Markets Equity and Asia Growth Funds may enter into such
contracts to seek to increase total return when the Underlying Fund's
investment adviser anticipates that the foreign currency will appreciate or
depreciate in value, but securities denominated or quoted in that currency do
not present attractive investment opportunities and are not held in the
Underlying Fund's portfolio. When entered into to seek to enhance return,
forward foreign currency exchange contracts are considered speculative.
Certain Underlying Funds may also engage in cross-hedging by using forward
contracts in a currency different from that in which the hedged security is
denominated or quoted if the Underlying Fund's investment adviser determines
that there is a pattern of correlation between the two currencies.
 
  An Underlying Fund will incur costs in connection with conversions between
various currencies. An Underlying Fund may hold foreign currency received in
connection with investments in foreign securities when, in the judgment of its
investment adviser, it would be beneficial to convert such currency into U.S.
dollars at a later date, based on anticipated changes in the relevant exchange
rates.
 
  Currency exchange rates may fluctuate significantly over short periods of
time causing, along with other factors, an Underlying Fund's net asset value
to fluctuate. Currency exchange rates generally are determined by
 
                                      A-3
<PAGE>
 
the forces of supply and demand in the foreign exchange markets and the
relative merits of investments in different countries, actual or anticipated
changes in interest rates and other complex factors, as seen from an
international perspective. Currency exchange rates also can be affected
unpredictably by the intervention of U.S. or foreign governments or central
banks or the failure to intervene or by currency controls or political
developments in the U.S. or abroad.
 
  Certain of the Underlying Funds may enter into currency swaps, which involve
the exchange by the Underlying Fund with another party for their respective
rights to make or receive payments in specified currencies. Currency swaps
usually involve the delivery of a gross payment stream in one designated
currency in exchange for the gross payment stream in another designated
currency. Therefore, the entire payment stream under a currency swap is
subject to the risk that the other party to the swap will default on its
contractual delivery obligations.
 
  The market in forward foreign currency exchange contracts, currency swaps
and other privately negotiated currency instruments offers less protection
against defaults by the other party to such instruments than is available for
currency instruments traded on an exchange. Such contracts are subject to the
risk that the counterparty to the contract will default on its obligations.
Since these contracts are not guaranteed by an exchange or clearinghouse, a
default on the contract would deprive an Underlying Fund of unrealized profits
or the benefits of a currency hedge or force the Underlying Fund to cover its
purchase or sale commitments, if any, at the current market price.
 
FIXED-INCOME SECURITIES
 
  U.S. Government Securities. The Underlying Funds may invest in U.S.
Government securities. Generally, these securities include U.S. Treasury
obligations and obligations issued or guaranteed by U.S. Government agencies,
instrumentalities or sponsored enterprises. U.S. Government securities also
include Treasury receipts and other stripped U.S. Government securities, where
the interest and principal components of stripped U.S. Government securities
are traded independently.
 
  Foreign Government Securities. The Core Fixed Income, Global Income, High
Yield, CORE International Equity, International Equity, Japanese Equity,
International Small Cap, Emerging Markets Equity and Asia Growth Funds may
invest in debt obligations of foreign governments and governmental agencies,
including those of Emerging Countries. Investment in sovereign debt
obligations involves special risks not present in debt obligations of
corporate issuers. The issuer of the debt or the governmental authorities that
control the repayment of the debt may be unable or unwilling to repay
principal or interest when due in accordance with the terms of such debt, and
the Underlying Fund may have limited recourse in the event of a default.
Periods of economic uncertainty may result in the volatility of market prices
of sovereign debt, and in turn the Underlying Fund's NAV, to a greater extent
than the volatility inherent in debt obligations of U.S. issuers. A sovereign
debtor's willingness or ability to repay principal and pay interest in a
timely manner may be affected by, among other factors, its cash flow
situation, the extent of its foreign currency reserves, the availability of
sufficient foreign exchange on the date a payment is due, the relative size of
the debt service burden to the economy as a whole, the sovereign debtor's
policy toward international lenders and the political constraints to which a
sovereign debtor may be subject.
 
  Mortgage-Backed Securities. The Underlying Funds (other than the four CORE
Equity Funds) may invest in mortgage-backed securities ("Mortgage-Backed
Securities"), which represent direct or indirect participations in, or are
collateralized by and payable from, mortgage loans secured by real property.
Therefore, Mortgage-Backed Securities are often subject to more rapid
repayment than their stated maturity date would indicate as a
 
                                      A-4
<PAGE>
 
result of principal prepayments on the underlying loans. This can result in
significantly greater price and yield volatility than is the case with
traditional fixed-income securities. During periods of declining interest
rates, prepayments can be expected to accelerate, and thus impair the
Underlying Fund's ability to reinvest the returns of principal at comparable
yields. Conversely, in a rising interest rate environment, a declining
prepayment rate will extend the average life of many Mortgage-Backed
Securities and prevent the Underlying Fund from taking advantage of such
higher yields.
 
  Adjustable Rate Mortgage-Backed Securities ("ARMS"). ARMs allow the
Underlying Fund to participate in increases in interest rates through periodic
increases in the securities' coupon rates. During periods of declining
interest rates, coupon rates may readjust downward resulting in lower yields
to the Underlying Fund. Therefore, the value of an ARM is unlikely to rise
during periods of declining interest rates to the same extent as fixed-rate
securities. Interest rate declines may result in accelerated prepayment of
mortgages with the result that proceeds from prepayments will be reinvested at
lower interest rates. During periods of rising interest rates, changes in the
coupon rate will lag behind changes in the market rate. ARMs are also
typically subject to maximum increases and decreases in the interest rate
adjustment which can be made on any one adjustment date, in any one year, or
during the life of the security. In the event of dramatic increases or
decreases in prevailing market interest rates, the value of the Underlying
Fund's investments in ARMs may fluctuate more substantially since these limits
may prevent the security from fully adjusting its interest rate to the
prevailing market rates.
 
  The Underlying Funds may invest in Mortgage-Backed Securities issued or
sponsored by both government and non-governmental entities. Privately issued
Mortgage-Backed Securities are generally backed by pools of conventional
(i.e., non-government guaranteed or insured) mortgage loans. In order to
receive a high quality rating from the rating organizations (e.g., S&P or
Moody's), privately issued Mortgaged-Backed Securities normally are structured
with one or more types of "credit enhancement."
 
  The Underlying Funds may also invest in multiple class securities, including
collateralized mortgage obligations ("CMOs") and Real Estate Mortgage
Investment Conduit ("REMIC") pass-through or participation certificates. CMOs
provide an investor with a specified interest in the cash flow from a pool of
underlying mortgages or of other Mortgage-Backed Securities. CMOs are issued
in multiple classes, each with a specified fixed or floating interest rate and
a final scheduled distribution date. In most cases, payments of principal are
applied to the CMO classes in the order of their respective stated maturities,
so that no principal payments will be made on a CMO class until all other
classes having an earlier stated maturity date are paid in full. A REMIC is a
CMO that qualifies for special tax treatment under the Code, and invests in
certain mortgages principally secured by interests in real property and other
permitted investments.
 
  The Underlying Fixed-Income Funds may also invest in stripped Mortgage-
Backed Securities ("SMBS") (including interest only and principal only
securities), which are derivative multiple class Mortgage-Backed Securities.
SMBS are usually structured with two different classes: one that receives 100%
of the interest payments and the other that receives 100% of the principal
payments from a pool of mortgage loans. If the underlying mortgage loans
experience different than anticipated prepayments of principal, a Fund may
fail to fully recoup its initial investment in these securities. The market
value of the class consisting entirely of principal payments generally is
unusually volatile in response to changes in interest rates. The yields on a
class of SMBS that receives all or most of the interest from mortgage loans
are generally higher than prevailing market yields on other Mortgage-Backed
Securities because their cash flow patterns are more volatile and there is a
greater risk that the initial investment will not be fully recouped.
 
 
                                      A-5
<PAGE>
 
  Because derivative Mortgage-Backed Securities (such as principal-only (POs),
interest-only (IOs) or inverse floating rate securities) are more exposed to
mortgage prepayments, they generally involve a greater amount of risk. Small
changes in prepayments can significantly impact the cash flow and the market
value of these securities. The risk of faster than anticipated prepayments
generally adversely affects IOs, super floaters and premium priced Mortgage-
Backed Securities. The risk of slower than anticipated prepayments generally
adversely affects POs, floating-rate securities subject to interest rate caps,
support tranches and discount priced Mortgage-Backed Securities. In addition,
particular derivative securities may be leveraged such that their exposure
(i.e., price sensitivity) to interest rate and/or prepayment risk is
magnified.
 
  Asset-Backed Securities. The Underlying Funds (other than the four CORE
Equity Funds, the Adjustable Rate Government Fund and the Short Duration
Government Fund) may also invest in asset-backed securities ("Asset-Backed
Securities"). The principal and interest payments on Asset-Backed Securities
are collateralized by pools of assets such as auto loans, credit card
receivables, leases, installment contracts and personal property. Such asset
pools are securitized through the use of special purpose trusts or
corporations. Principal and interest payments may be credit enhanced by a
letter of credit, a pool insurance policy or a senior/subordinated structure.
 
  Corporate and Bank Obligations. The Underlying Funds may invest in
obligations issued or guaranteed by U.S. or foreign corporations and banks.
Banks are subject to extensive but different governmental regulations which
may limit both the amount and types of loans which may be made and interest
rates which may be charged. In addition, the profitability of the banking
industry is largely dependent upon the availability and cost of funds for the
purpose of financing lending operations under prevailing money market
conditions. General economic conditions as well as exposure to credit losses
arising from possible financial difficulties of borrowers play an important
part in the operation of this industry.
 
  Structured Securities. The Underlying Funds may invest in structured
securities. The value of the principal of and/or interest on such securities
is determined by reference to changes in the value of specific currencies,
interest rates, commodities, indices or other financial indicators (the
"Reference") or the relative change in two or more References. The interest
rate or the principal amount payable upon maturity or redemption may be
increased or decreased depending upon changes in the applicable Reference. The
terms of the structured securities may provide that in certain circumstances
no principal is due at maturity and, therefore, result in the loss of the
Underlying Fund's investment. Structured securities may be positively or
negatively indexed, so that appreciation of the Reference may produce an
increase or decrease in the interest rate or value of the security at
maturity. In addition, changes in the interest rates or the value of the
security at maturity may be a multiple of changes in the value of the
Reference. Consequently, structured securities may entail a greater degree of
market risk than other types of fixed-income securities. Structured securities
may also be more volatile, less liquid and more difficult to accurately price
than less complex securities.
 
  Municipal Securities. The Core Fixed Income and High Yield Funds may make
limited investments in instruments issued by state and local governmental
issuers. These securities may include private activity bonds, municipal
leases, certificates of participation and "auction rate" securities.
 
  Zero Coupon, Deferred Interest, Pay-In-Kind and Capital Appreciation
Bonds. Each Underlying Fund may invest in zero coupon, deferred interest and
capital appreciation bonds. These are securities issued at a discount from
their face value because interest payments are typically postponed until
maturity. These securities also may take the form of debt securities that have
been stripped of their interest payments. Each Underlying Fund may also invest
in pay-in-kind securities which are securities that have interest payable by
the delivery of additional securities. The market prices of zero coupon,
deferred interest, pay-in-kind and capital appreciation
 
                                      A-6
<PAGE>
 
bonds generally are more volatile than the market prices of interest-bearing
securities and are likely to respond to a greater degree to changes in
interest rates than interest-bearing securities having similar maturities and
credit quality.
 
  Rating Criteria. The rating requirements for each of the Underlying Fixed-
Income Funds are stated above. Except as noted below, the Underlying Equity
Funds (other than the four CORE Equity Funds, which only invest in debt
instruments that are cash equivalents) may invest in debt securities rated at
least investment grade at the time of investment. Investment grade debt
securities are securities rated BBB or higher by Standard & Poor's or Baa or
higher by Moody's. The Growth and Income, Capital Growth, Small Cap Value,
International Equity, Japanese Equity, International Small Cap, Emerging
Markets Equity, Asia Growth and Real Estate Securities Funds may invest up to
10%, 10%, 35%, 35%, 35%, 35%, 35%, 35% and 20%, respectively, of their total
assets in debt securities which are rated in the lowest rating categories by
Standard & Poor's or Moody's (i.e., BB or lower by Standard & Poor's or Ba or
lower by Moody's), including securities rated D by Moody's or Standard &
Poor's. The Mid Cap Equity Fund may invest up to 10% of its total assets in
below investment grade debt securities rated B or higher by Standard & Poor's
or Moody's. Fixed-income securities rated BB or Ba or below (or comparable
unrated securities) are commonly referred to as "junk bonds," are considered
predominately speculative and may be questionable as to principal and interest
payments as described further below under "Risks of Investing in Non-
Investment Grade Fixed-Income Securities." See Appendix A to the Additional
Statement for a description of the corporate bond ratings assigned by Standard
& Poor's and Moody's.
 
OPTIONS ON SECURITIES AND SECURITIES INDICES
 
  An Underlying Fund (other than the CORE U.S. Equity and CORE Large Cap
Growth Funds) may write (sell) covered call and put options and purchase call
and put options on any securities in which it may invest or on any securities
index composed of securities in which it may invest. The writing and purchase
of options is a highly specialized activity which involves investment
techniques and risks different from those associated with ordinary portfolio
securities transactions. The use of options to seek to increase total return
involves the risk of loss if the Underlying Fund's investment adviser is
incorrect in its expectation of fluctuations in securities prices or interest
rates. The successful use of options for hedging purposes also depends in part
on the ability of the investment adviser to manage future price fluctuations
and the degree of correlation between the options and securities markets. If
the investment adviser is incorrect in its expectation of changes in
securities prices or determination of the correlation between the securities
indices on which options are written and purchased and the securities in the
Underlying Fund's investment portfolio, the investment performance of the
Underlying Fund will be less favorable than it would have been in the absence
of such options transactions. The writing of options could significantly
increase the Underlying Fund's portfolio turnover rate and, therefore,
associated brokerage commissions or spreads.
 
OPTIONS ON FOREIGN CURRENCIES
 
  An Underlying Fund may, to the extent it invests in foreign securities,
purchase and sell (write) call and put options on foreign currencies for the
purpose of protecting against declines in the U.S. dollar value of foreign
portfolio securities and anticipated dividends on such securities and against
increases in the U.S. dollar cost of foreign securities to be acquired. In
addition, certain Underlying Funds may use options on currency to cross-hedge,
which involves writing or purchasing options on one currency to hedge against
changes in exchange rates for a different currency, if there is a pattern of
correlation between the two currencies. As with other kinds of options
transactions, however, the writing of an option on a foreign currency will
constitute only a partial hedge, up to the amount of the premium received. If
an option that the Underlying Fund has written is exercised, the
 
                                      A-7
<PAGE>
 
Underlying Fund could be required to purchase or sell foreign currencies at
disadvantageous exchange rates, thereby incurring losses. The purchase of an
option on foreign currency may constitute an effective hedge against exchange
rate fluctuations; however, in the event of exchange rate movements adverse to
the Underlying Fund's position, the Underlying Fund may forfeit the entire
amount of the premium plus related transaction costs. In addition to
purchasing call and put options for hedging purposes, the Core Fixed Income,
Global Income, High Yield, CORE International Equity, International Equity,
Japanese Equity, International Small Cap, Emerging Markets Equity and Asia
Growth Funds may purchase call or put options on currency to seek to increase
total return when the Underlying Fund's investment adviser anticipates that
the currency will appreciate or depreciate in value, but the securities quoted
or denominated in that currency do not present attractive investment
opportunities and are not held in the Underlying Fund's portfolio. When
purchased or sold to seek to increase total return, options on currencies are
considered speculative. Options on foreign currencies written or purchased by
the Underlying Funds are traded on U.S. and foreign exchanges or over-the-
counter.
 
FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS
 
  To seek to increase total return or to hedge against changes in interest
rates, securities prices or currency exchange rates, an Underlying Fund may
purchase and sell various kinds of futures contracts, and purchase and write
call and put options on any of such futures contracts. Each Fund may also
enter into closing purchase and sale transactions with respect to any such
contracts and options.
 
  The futures contracts may be based on various securities (such as U.S.
Government securities), foreign currencies, securities indices and other
financial instruments and indices, whether domestic or foreign. An Underlying
Fund will engage in futures and related options transactions for bona fide
hedging purposes as defined in regulations of the Commodity Futures Trading
Commission or to seek to increase total return to the extent permitted by such
regulations. The Underlying Fund may not purchase or sell futures contracts or
purchase or sell related options to seek to increase total return, except for
closing purchase or sale transactions, if immediately thereafter the sum of
the amount of initial margin deposits and premiums paid on the Underlying
Fund's outstanding positions in futures and related options entered into for
the purpose of seeking to increase total return would exceed 5% of the market
value of the Underlying Fund's net assets. These transactions involve
brokerage costs, require margin deposits and, in the case of contracts and
options obligating the Underlying Fund to purchase securities or currencies,
require the Underlying Fund to segregate and maintain cash or liquid assets
with a value equal to the amount of the Underlying Fund's obligations or to
otherwise cover the obligations in a manner permitted by the SEC.
 
  While transactions in futures contracts and options on futures may reduce
certain risks, such transactions themselves entail certain other risks. See
"Investment Objectives and Policies--Futures Contracts and Options on Future
Contracts" in the Additional Statement. Thus, while the Underlying Fund may
benefit from the use of futures and options on futures, unanticipated changes
in interest rates, securities prices or currency exchange rates may result in
poorer overall performance than if the Underlying Fund had not entered into
any futures contracts or options transactions. Because perfect correlation
between a futures position and portfolio position that is intended to be
protected is impossible to achieve, the desired protection may not be obtained
and the Underlying Fund may be exposed to risk of loss. The loss incurred by
the Underlying Fund in entering into futures contracts and in writing call
options on futures is potentially unlimited and may exceed the amount of the
premium received. Futures markets are highly volatile and the use of futures
may increase the volatility of the Underlying Fund's NAV. The profitability of
the Underlying Fund's trading in futures to seek to increase total return
depends upon the ability of the investment adviser to analyze correctly the
futures markets. In addition, because of the low margin deposits normally
required in futures trading, a relatively small price movement in a futures
contract
 
                                      A-8
<PAGE>
 
may result in substantial losses to the Underlying Fund. Further, futures
contracts and options on futures may be illiquid, and exchanges may limit
fluctuations in futures contract prices during a single day. The Underlying
Funds may engage in futures transactions on both U.S. and foreign exchanges.
Foreign exchanges may not provide the same protections as U.S. exchanges.
STANDARD AND POOR'S DEPOSITORY RECEIPTS
 
  Each Underlying Equity Fund may, consistent with its objectives, purchase
Standard & Poor's Depository Receipts ("SPDRs"). SPDRs are American Stock
Exchange-traded securities that represent ownership in the SPDR Trust, a trust
which has been established to accumulate and hold a portfolio of common stocks
that is intended to track the price performance and dividend yield of the S&P
500. This trust is sponsored by a subsidiary of the American Stock Exchange.
SPDRs may be used for several reasons, including but not limited to:
facilitating the handling of cash flows or trading, or reducing transaction
costs. The use of SPDRs would introduce additional risks to the portfolio as
the price movement of the instrument does not perfectly correlate with the
price action of the underlying index.
 
EQUITY SWAPS
 
  Each Underlying Equity Fund may invest up to 10% of its total assets in
equity swaps. Equity swaps allow the parties to a swap agreement to exchange
the dividend income or other components of return on an equity investment
(e.g., a group of equity securities or an index) for a component of return on
another non-equity or equity investment. An equity swap may be used by a Fund
to invest in a market without owning or taking physical custody of securities
in circumstances in which direct investment may be restricted for legal reasons
or is otherwise impractical. Equity swaps are derivatives and their value can
be very volatile. To the extent that its Investment Adviser does not accurately
analyze and predict the potential relative fluctuation of the components
swapped with another party, a Fund may suffer a loss. The value of some
components of an equity swap (such as the dividends on a common stock) may also
be sensitive to changes in interest rates. Furthermore, during the period a
swap is outstanding, a Fund may suffer a loss if the counterparty defaults. In
connection with its investments in equity swaps, a Fund will either segregate
cash or liquid assets or otherwise cover its obligations in a manner required
by the SEC.
 
WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS
 
  The Underlying Funds may purchase when-issued securities. When-issued
transactions arise when securities are purchased by the Underlying Fund with
payment and delivery taking place in the future in order to secure what is
considered to be an advantageous price and yield to the Underlying Fund at the
time of entering into the transaction. Each Underlying Fund may also purchase
or sell securities on a forward commitment basis; that is, make contracts to
purchase or sell securities for a fixed price at a future date beyond the
customary three-day settlement period. The purchase of securities on a when-
issued or forward commitment basis involves a risk of loss if the value of the
security to be purchased declines prior to the settlement date. Conversely,
securities sold on a forward commitment basis involve the risk that the value
of the securities to be sold may increase prior to the settlement date.
Although the Underlying Fund would generally purchase securities on a when-
issued or forward commitment basis with the intention of acquiring securities
for its portfolio, the Underlying Fund may dispose of when-issued securities or
forward commitments prior to settlement if its investment adviser deems it
appropriate to do so. The Underlying Fund will segregate cash or liquid assets
in an amount sufficient to meet the purchase price until three days prior to
the settlement date. Alternately, each Underlying Fund may enter into
offsetting contracts for the forward sale of other securities that it owns.
 
                                      A-9
<PAGE>
 
ILLIQUID AND RESTRICTED SECURITIES
 
  No Underlying Fund will invest more than 15% (10% in the case of the
Financial Square Prime Obligations Fund) of its net assets in illiquid
investments, which include securities (both foreign and domestic) that are not
readily marketable, swap transactions, certain SMBS, repurchase agreements
maturing in more than seven days, time deposits with a notice or demand period
of more than seven days, certain over-the-counter options and certain
restricted securities, unless it is determined, based upon the continuing
review of the trading markets for a specific restricted security, that such
restricted security is eligible for resale under Rule 144A under the
Securities Act of 1933 and, therefore, is liquid. Investing in restricted
securities eligible for resale pursuant to Rule 144A may decrease the
liquidity of an Underlying Fund's portfolio to the extent that qualified
institutional buyers become for a time uninterested in purchasing these
restricted securities. The purchase price and subsequent valuation of
restricted and illiquid securities normally reflect a discount, which may be
significant, from the market price of comparable securities for which a market
exists.
 
REPURCHASE AGREEMENTS
 
  The Underlying Funds may enter into repurchase agreements with dealers in
U.S. Government securities and member banks of the Federal Reserve System
which furnish collateral at least equal in value or market price to the amount
of their repurchase obligation. The Core Fixed Income, Global Income, High
Yield, CORE International Equity, International Equity, Japanese Equity,
International Small Cap, Emerging Markets Equity and Asia Growth Funds may
also enter into repurchase agreements involving certain foreign government
securities. If the other party or "seller" defaults, the Underlying Fund might
suffer a loss to the extent that the proceeds from the sale of the underlying
securities and other collateral are less than the repurchase price. In
addition, in the event of bankruptcy of the seller or failure of the seller to
repurchase the securities as agreed, the Underlying Fund could suffer losses,
including loss of interest on or principal of the security and costs
associated with delay and enforcement of the repurchase agreement. Each
Underlying Fund, together with other registered investment companies having
management agreements with GSAM or its affiliates, may transfer uninvested
cash balances into a single joint account, the daily aggregate balance of
which will be invested in one or more repurchase agreements.
 
LENDING OF PORTFOLIO SECURITIES
 
  The Underlying Funds may also seek to increase their income by lending
portfolio securities. Under present regulatory policies, such loans may be
made to institutions, such as certain broker-dealers, and are required to be
secured continuously by collateral in cash, cash equivalents, or U.S.
Government securities maintained on a current basis in an amount at least
equal to the market value of the securities loaned. Cash collateral may be
invested in cash equivalents. The value of the securities loaned may not
exceed 33 1/3% of the value of the total assets of an Underlying Fund
(including the loan collateral). A loss or delay in the recovery of securities
could result if the institution which borrows securities breaches its
agreement with the Underlying Fund.
 
SHORT SALES AGAINST-THE-BOX
 
  Certain Underlying Funds may make short sales of securities or maintain a
short position, provided that at all times when a short position is open the
Underlying Fund owns an equal amount of such securities or securities
convertible into or exchangeable, without payment of any further
consideration, for an equal amount of the securities of the same issuer as the
securities sold short (a short sale against-the-box). Not more than 25% of the
Underlying Fund's net assets (determined at the time of the short sale) may be
subject to such short sales.
 
                                     A-10
<PAGE>
 
MORTGAGE DOLLAR ROLLS
 
  The Underlying Fixed-Income Funds (except the High Yield Fund) and the Real
Estate Securities Fund may enter into mortgage "dollar rolls" in which the
Underlying Fund sells securities for delivery in the current month and
simultaneously contracts with the same counterparty to repurchase
substantially similar but not identical securities on a specified future date.
During the roll period, the Underlying Fund loses the right to receive
principal and interest paid on the securities sold. However, the Underlying
Fund would benefit to the extent of any difference between the price received
for the securities sold and the lower forward price for the future purchase or
fee income plus the interest earned on the cash proceeds of the securities
sold until the settlement date for the forward purchase. Unless such benefits
exceed the income, capital appreciation and gain or loss due to mortgage
prepayments that would have been realized on the securities sold as part of
the mortgage dollar roll, the use of this technique will diminish the
investment performance of the Underlying Fund.
 
TEMPORARY INVESTMENTS
 
  Each Underlying Fund may, for temporary defensive purposes, invest 100% of
its total assets (except that the CORE Equity Funds and Emerging Markets
Equity Fund may only hold up to 35% of their respective total assets) in high
quality fixed income securities. When assets are invested in such instruments,
an Underlying Fund may not be achieving its investment objective.
 
PORTFOLIO TURNOVER
 
  The turnover rates of the Underlying Funds have ranged from 41% to 396%
during their most recent fiscal years. There can be no assurance that the
turnover rates of these Underlying Funds will remain within this range during
subsequent fiscal years. Higher turnover rates may result in higher brokerage
costs and higher expenses being incurred by the Underlying Funds. In addition,
higher turnover rates may result in higher taxable realized gains being
incurred by shareholders.
 
MISCELLANEOUS TECHNIQUES
 
  In addition to the techniques and investments described above, each
Underlying Fund may engage in the following techniques and investments: (i)
mortgage swaps, credit swaps, index swaps and interest rate swaps, caps,
floors and collars (Underlying Fixed-Income Funds and Real Estate Securities
Fund only), (ii) yield curve options and inverse floating rate securities
(Underlying Fixed-Income Funds and Real Estate Securities Fund only), (iii)
loan participations (High Yield Fund only), (iv) other investment companies,
(v) unseasoned companies, (vi) custodial receipts, and (vii) reverse
repurchase agreements for investment purposes (Underlying Fixed-Income Funds
only).
 
  In addition, each Underlying Fund may borrow up to 33 1/3% of its total
assets from banks for temporary or emergency purposes. An Underlying Fund may
not make additional investments if borrowings (excluding covered mortgage
dollar rolls) exceed 5% of its total assets.
 
                      (2) RELATED ADDITIONAL RISK FACTORS
 
RISKS OF INVESTING IN SMALL CAPITALIZATION COMPANIES AND REITS
 
  Investing in the securities of small capitalization companies and REITs
involves greater risk and the possibility of greater portfolio price
volatility. Among the reasons for the greater price volatility of these
 
                                     A-11
<PAGE>
 
securities are the less certain growth prospects of smaller firms and the
lower degree of liquidity in the markets for such securities. Small
capitalization companies and REITs may have limited financial resources, may
trade less frequently and in a limited volume and may be subject to more
abrupt or erratic price movements than larger capitalization companies. An
Underlying Fund may invest in securities of small capitalization companies and
REITs that have experienced financial difficulties or are in an early
development stage. Other risks associated with REITs are discussed in this
Appendix A under "Real Estate Investment Trusts ("REITs')."
 
SPECIAL RISKS OF INVESTMENTS IN THE ASIAN AND OTHER EMERGING MARKETS
 
  Investing in the securities of issuers in Emerging Countries involves risks
in addition to those discussed in this Appendix A under "Foreign Investments."
The International Equity, International Small Cap, Emerging Markets Equity and
Asia Growth Funds may each invest without limit in the securities of issuers
in Emerging Countries. Up to 35% of the total assets of the Emerging Markets
Equity Fund may be invested in securities of issuers in any one Emerging
Country. The Growth and Income, Small Cap Value, Mid Cap Equity, High Yield
and CORE International Equity Funds may each invest up to 25%, and the Core
Fixed Income, Global Income and Capital Growth Funds may each invest up to
10%, of their respective total assets in securities of issuers in Emerging
Countries.
 
  Many Emerging Countries are subject to a greater degree of economic,
political and social instability than is the case in Western Europe, the
United States, Canada, Australia, New Zealand and Japan. The governments of
some Emerging Countries are authoritarian in nature or have been installed or
removed as a result of military coups, while governments in other Emerging
Countries have periodically used force to suppress civil dissent. Disparities
of wealth, the pace and success of democratization, and ethnic, religious and
racial disaffection, among other factors, have also led to social unrest,
violence and/or labor unrest in some Asian and other Emerging Countries.
Investing in Emerging Countries involves the risk of loss due to
expropriation, nationalization, confiscation of assets and property or the
imposition of restrictions on foreign investments and on repatriation of
capital invested. Many Emerging Countries have experienced currency
devaluations and substantial and, in some cases, extremely high rates of
inflation, which have a negative effect on the economies and securities
markets of such Emerging Countries. Economies in Emerging Countries generally
are dependent heavily upon commodity prices and international trade and,
accordingly, have been and may continue to be affected adversely by the
economies of their trading partners, trade barriers, exchange controls,
managed adjustments in relative currency values and other protectionist
measures imposed or negotiated by the countries with which they trade.
 
  The securities markets of Emerging Countries are marked by a high
concentration of market capitalization and trading volume in a small number of
issuers representing a limited number of industries, as well as a high
concentration of ownership of such securities by a limited number of
investors. The Underlying Fund's purchase and sale of portfolio securities in
certain Emerging Countries may be constrained by limitations as to daily
changes in the prices of listed securities, periodic trading or settlement
volume and/or limitations on aggregate holdings of foreign investors. In
addition, settlement procedures in Emerging Countries are frequently less
developed and reliable than those in the United States and may involve the
Underlying Fund's delivery of securities before receipt of payment for their
sale. Significant delays are common in certain markets in registering the
transfer of securities. Settlement or registration problems may make it more
difficult for the Underlying Fund to value its portfolio securities and could
cause the Underlying Fund to miss attractive investment opportunities, to have
a portion of its assets uninvested or to incur losses due to the failure of a
counterparty to pay for securities the Underlying Fund has delivered or the
Underlying Fund's inability to complete its contractual obligations.
 
                                     A-12
<PAGE>
 
RISKS OF INVESTING IN FIXED-INCOME SECURITIES
 
  The Financial Square Prime Obligations Fund attempts to maintain a stable
NAV of $1.00 per Share and values its assets using the amortized cost method
in accordance with SEC regulations. There is no assurance, however, that the
Financial Square Prime Obligations Fund will be successful in maintaining its
per share value at $1.00 on a continuous basis. The per share NAVs of the
other Underlying Funds are expected to fluctuate on a daily basis.
 
  When interest rates decline, the market value of fixed-income securities
tends to increase. Conversely, when interest rates increase, the market value
of fixed-income securities tends to decline. Volatility of a security's market
value will differ depending upon the security's duration, the issuer and the
type of instrument. Investments in fixed-income securities are subject to the
risk that the issuer could default on its obligations and an Underlying Fund
could sustain losses on such investments. A default could impact both interest
and principal payments.
 
  The Underlying Funds may invest in various types of derivative debt
securities that present more complex types of interest rate risks. These risks
include call risk and extension risk. Call risk (i.e., where the issuer
exercises its right to pay principal on an obligation earlier than scheduled)
causes cash flow to be returned earlier than expected. This typically results
when interest rates have declined and an Underlying Fund will suffer from
having to reinvest in lower yielding securities. Extension risk (i.e., where
the issuer exercises its right to pay principal on an obligation later than
scheduled) causes cash flows to be returned later than expected. This
typically results when interest rates have increased, and the Underlying Fund
may be unable to recoup all of its initial investment and will also suffer
from the inability to invest in higher yielding securities.
 
  Asset-Backed Securities present certain credit risks that are not presented
by Mortgage-Backed Securities because Asset-Backed Securities generally do not
have the benefit of a security interest in collateral that is comparable to
mortgage assets. There is the possibility that, in some cases, recoveries on
repossessed collateral may not be available to support payments on these
securities.
 
RISKS OF INVESTING IN NON-INVESTMENT GRADE FIXED-INCOME SECURITIES
 
  Non-investment grade fixed-income securities are considered predominantly
speculative by traditional investment standards. In some cases, these
obligations may be highly speculative and have poor prospects for reaching
investment grade standing. Non-investment grade fixed-income securities and
unrated securities of comparable credit quality (commonly known as "junk
bonds") are subject to the increased risk of an issuer's inability to meet
principal and interest obligations. These securities, also referred to as high
yield securities, may be subject to greater price volatility due to such
factors as specific corporate developments, interest rate sensitivity,
negative perceptions of the junk bond markets generally and less secondary
market liquidity. Non-investment grade securities are generally unsecured and
are often subordinated to the rights of other creditors of the issuers of such
securities. Investment by the Underlying Fund in defaulted securities poses
additional risk of loss should nonpayment of principal and interest continue
in respect of such securities. Even if such securities are held to maturity,
recovery by the Underlying Fund of its initial investment and any anticipated
income or appreciation is uncertain.
 
RISKS OF OTHER DERIVATIVE TRANSACTIONS
 
  An Underlying Fund's transactions, if any, in options, futures, options on
futures, swaps, structured securities and currency forward contracts involve
certain risks, including a possible lack of correlation between
 
                                     A-13
<PAGE>
 
changes in the value of hedging instruments and the portfolio assets (if any)
being hedged, the potential illiquidity of the markets for derivative
instruments, the risks arising from margin requirements and related leverage
factors associated with such transactions. The use of these management
techniques to seek to increase total return may be regarded as a speculative
practice and involves the risk of loss if the investment adviser is incorrect
in its expectation of fluctuations in securities prices, interest rates or
currency prices.
 
NON-DIVERSIFICATION
 
  The Global Income Fund is registered as a "non-diversified" Fund under the
1940 Act and is, therefore, more susceptible to adverse developments affecting
any single issuer. In addition, the Global Income Fund, and certain other
Underlying Funds, may invest more than 25% of their total assets in the
securities of corporate and governmental issuers located in a single foreign
country. Concentration of a Fund's investments in such issuers will subject
the Fund, to a greater extent than if investment was more limited, to the
risks of adverse securities markets, exchange rates and social, political or
economic events which may occur in those countries.
 
                                     A-14
<PAGE>
 
 
                                  APPENDIX B
 
   GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON ACCOUNT
                               INFORMATION FORM
 
  You are required by law to provide the Portfolio with your correct Taxpayer
Identification Number (TIN), regardless of whether you file tax returns.
Failure to do so may subject you to penalties. Failure to provide your correct
TIN and to sign your name in the Certification section of the Account
Information Form could result in withholding of 31% by the Portfolio for the
federal backup withholding tax on distributions, redemptions, exchanges and
other payments relating to your account.
 
  Any tax withheld may be credited against taxes owed on your federal income
tax return.
 
  If you do not have a TIN, you should apply for one immediately by contacting
your local office of the Social Security Administration or the Internal
Revenue Service (IRS). Backup withholding could also apply to payments
relating to your account prior to the Portfolio's receipt of your TIN. Special
rules apply for certain entities. For example, for an account established
under a Uniform Gifts or Transfers to Minors Act, the TIN of the minor should
be furnished.
 
  If you have been notified by the IRS that you are subject to backup
withholding because you failed to report all your interest and/or dividend
income on your tax return and you have not been notified by the IRS that such
withholding should cease, you must cross out item (2) in the Certification
section of the Account Information Form.
 
  If you are an exempt recipient, you should furnish your TIN and certify your
exemption by signing the Certification section and writing "exempt" after your
signature. Exempt recipients include: corporations, tax-exempt pension plans
and IRAs, governmental agencies, financial institutions, registered securities
and commodities dealers and others.
 
  If you are a nonresident alien or foreign entity, you must provide a
completed Form W-8 to the Portfolio in order to avoid backup withholding on
certain payments. Other payments to you may be subject to nonresident alien
withholding of up to 30%.
 
  For further information regarding backup and nonresident alien withholding,
see Sections 3406, 1441 and 1442 of the Code and consult your tax adviser.
 
                                      B-1
<PAGE>
 
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS ASSET
MANAGEMENT
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR
85 BROAD STREET
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
TRANSFER AGENT
4900 SEARS TOWER
CHICAGO, ILLINOIS 60606
 
STATE STREET BANK AND TRUST COMPANY
CUSTODIAN
1776 HERITAGE DRIVE
NORTH QUINCY, MASSACHUSETTS 02171
 
ARTHUR ANDERSEN LLP
INDEPENDENT PUBLIC ACCOUNTANTS
225 FRANKLIN STREET
BOSTON, MASSACHUSETTS 02110
 
TOLL FREE (IN U.S.) . . . . . . . . 800-621-2550
 
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS
 
ASSET ALLOCATION 
PORTFOLIOS
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
 
INSTITUTIONAL SHARES
 
LOGO
GOLDMAN
SACHS 
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
AAPROINST
501424
<PAGE>
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
 
                      GOLDMAN SACHS DOMESTIC EQUITY FUNDS
May 1, 1998, as revised September 1, 1998
                            CLASS A, B AND C SHARES
 
GOLDMAN SACHS BALANCED FUND
  Seeks long-term capital growth and current income through investments in eq-
  uity and fixed income securities.
 
GOLDMAN SACHS GROWTH AND INCOME FUND
  Seeks long-term growth of capital and growth of income through investments
  in equity securities that are considered to have favorable prospects for
  capital appreciation and/or dividend paying ability.
 
GOLDMAN SACHS CORE U.S. EQUITY FUND
  Seeks long-term growth of capital and dividend income through a broadly di-
  versified portfolio of large cap and blue chip equity securities represent-
  ing all major sectors of the U.S. economy.
 
GOLDMAN SACHS CORE LARGE CAP GROWTH FUND
  Seeks long-term growth of capital through a broadly diversified portfolio of
  equity securities of large cap U.S. issuers that are expected to have better
  prospects for earnings growth than the growth rate of the general domestic
  economy. Dividend income is a secondary consideration.
 
GOLDMAN SACHS CORE SMALL CAP EQUITY FUND
  Seeks long-term growth of capital through a broadly diversified portfolio of
  equity securities of U.S. issuers which are included in the Russell 2000 In-
  dex at the time of investment.
 
GOLDMAN SACHS CAPITAL GROWTH FUND
  Seeks long-term growth of capital through diversified investments in equity
  securities of companies that are considered to have long-term capital appre-
  ciation potential.
 
GOLDMAN SACHS MID CAP EQUITY FUND
  Seeks long-term capital appreciation primarily through investments in equity
  securities of companies with public stock market capitalizations within the
  range of the market capitalization of companies constituting the Russell
  Midcap Index at the time of investment (currentlybetween $400 million and
  $16 billion).
 
GOLDMAN SACHS SMALL CAP VALUE FUND
  Seeks long-term capital growth through investments in equity securities of
  companies with public stock market capitalizations of $1 billion or less at
  the time of investment.
 
  Goldman Sachs Asset Management ("GSAM"), New York, New York, a separate
operating division of Goldman, Sachs & Co. ("Goldman Sachs"), serves as
investment adviser to the Balanced, Growth and Income, CORE Large Cap Growth,
CORE Small Cap Equity, Mid Cap Equity and Small Cap Value (formerly "Small Cap
Equity") Funds. Goldman Sachs Funds Management, L.P. ("GSFM"), New York, New
York, an affiliate of Goldman Sachs, serves as investment adviser to the CORE
U.S. Equity (formerly the "Select Equity Fund") and Capital Growth Funds. GSAM
and GSFM are each referred to in this Prospectus as the "Investment Adviser."
Goldman Sachs serves as each Fund's distributor and transfer agent.
 
SHARES OF THE FUNDS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR
ENDORSED BY, ANY BANK OR OTHER INSURED DEPOSITORY INSTITUTION, AND ARE NOT
INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD
OR ANY OTHER GOVERNMENT AGENCY. AN INVESTMENT IN A FUND INVOLVES INVESTMENT
RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
 
 
                                                        (continued on next page)
<PAGE>
 
(cover continued)
 
  This Prospectus provides information about Goldman Sachs Trust (the "Trust")
and the Funds that a prospective investor should understand before investing.
This Prospectus should be retained for future reference. A Statement of
Additional Information (the "Additional Statement"), dated May 1, 1998, as
revised September 1, 1998, containing further information about the Trust and
the Funds which may be of interest to investors, has been filed with the
Securities and Exchange Commission ("SEC"), is incorporated herein by
reference in its entirety, and may be obtained without charge from Goldman
Sachs by calling the telephone number, or writing to one of the addresses,
listed on the back cover of this Prospectus. The SEC maintains a Web site
(http://www.sec.gov) that contains the Additional Statement and other
information regarding the Trust.
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
Fund Highlights....................    3
Fees and Expenses..................    7
Financial Highlights...............   12
Investment Objectives and Policies.   20
Description of Securities..........   25
Investment Techniques..............   30
Risk Factors.......................   35
Investment Restrictions............   36
Portfolio Turnover.................   36
Management.........................   36
Expenses...........................   42
Reports to Shareholders............   42
</TABLE>
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
How to Invest......................   42
Services Available to Shareholders.   48
Distribution and Service Plans.....   51
How to Sell Shares of the Funds....   52
Dividends..........................   54
Net Asset Value....................   54
Performance Information............   55
Shares of the Trust................   56
Taxation...........................   56
Additional Information.............   57
Appendix ..........................  A-1
Account Application
</TABLE>
 
                                       2
<PAGE>
 
 
                                FUND HIGHLIGHTS
 
   The following is intended to highlight certain information and is
 qualified in its entirety by the more detailed information contained in
 this Prospectus.
 
  WHAT IS THE GOLDMAN SACHS TRUST?
 
   The Goldman Sachs Trust is an open-end management investment company
 that offers its shares ("Shares") in several investment funds (commonly
 known as mutual funds (the "Funds")). Each Fund pools the monies of
 investors by selling its Shares to the public and investing these monies
 in a portfolio of securities designed to achieve that Fund's stated
 investment objectives.
 
  WHAT ARE THE INVESTMENT OBJECTIVES AND POLICIES OF THE FUNDS?
 
   Each Fund has distinct investment objectives and policies. There can be
 no assurance that a Fund's objectives will be achieved. Each Fund is a
 "diversified open-end management company" as defined in the Investment
 Company Act of 1940, as amended (the "Act"). For a further description of
 each Fund's investment objectives and policies, see "Investment
 Objectives and Policies," "Description of Securities" and "Investment
 Techniques."
 
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION> 
 FUND NAME   INVESTMENT OBJECTIVES       INVESTMENT CRITERIA             BENCHMARK
- ----------   ---------------------       -------------------             ---------
<S>          <C>                    <C>                            <C>
 BALANCED    Long-term capital      Between 45% and 65% of total   Lehman Aggregate Bond
 FUND        growth and current     assets in equity securities    Index and the
             income.                and at least 25% in fixed-     Standard & Poor's
                                    income senior securities.      Index of 500 Common
                                                                   Stocks (the "S&P 500
                                                                   Index")
- ----------------------------------------------------------------------------------------
 GROWTH AND  Long-term growth of    At least 65% of total assets   S&P 500 Index
 INCOME FUND capital and growth of  in equity securities that the
             income.                Investment Adviser considers
                                    to have favorable prospects
                                    for capital appreciation
                                    and/or dividend-paying
                                    ability.
- ----------------------------------------------------------------------------------------
 CORE U.S.   Long-term growth of    At least 90% of total assets   S&P 500 Index
 EQUITY FUND capital and dividend   in equity securities of U.S.
             income.                issuers, including certain
                                    foreign issuers traded in the
                                    U.S. The Fund seeks to achieve
                                    its objective through a
                                    broadly diversified portfolio
                                    of large cap and blue chip
                                    equity securities representing
                                    all major sectors of the U.S.
                                    economy. The Fund's
                                    investments are selected using
                                    both  a variety of
                                    quantitative techniques and
                                    fundamental research in
                                    seeking to maximize the Fund's
                                    expected return, while
                                    maintaining risk, style,
                                    capitalization and
                                    industry characteristics
                                    similar to the S&P 500 Index.
</TABLE>
 
 
                                                                     (continued)
 
                                       3
<PAGE>
 
<TABLE>
<CAPTION> 
                  INVESTMENT
 FUND NAME        OBJECTIVES             INVESTMENT CRITERIA              BENCHMARK
- ----------   ---------------------       -------------------             ---------
<S>          <C>                  <C>                                <C>
 CORE LARGE  Long-term growth of  At least 90% of total assets in    Russell 1000 Growth
 CAP GROWTH  capital.             equity securities of U.S.          Index
 FUND        Dividend income is a issuers, including certain
             secondary            foreign issuers traded in the
             consideration.       U.S. The Fund seeks to achieve
                                  its objective through a broadly
                                  diversified portfolio of equity
                                  securities of large cap U.S.
                                  issuers that are expected to have
                                  better prospects for earnings
                                  growth than the growth rate of
                                  the general domestic economy. The
                                  Fund's investments are selected
                                  using both a variety of
                                  quantitative techniques and
                                  fundamental research in seeking
                                  to maximize the Fund's expected
                                  return, while maintaining risk,
                                  style, capitalization and
                                  industry characteristics similar
                                  to the Russell 1000 Growth Index.
- ----------------------------------------------------------------------------------------
 CORE SMALL  Long-term growth of  At least 90% of total assets in    Russell 2000 Index
 CAP EQUITY  capital.             equity securities of U.S.
 FUND                             issuers, including certain
                                  foreign issuers traded in the
                                  U.S. The Fund seeks to achieve
                                  its objective through a broadly
                                  diversified portfolio of equity
                                  securities of U.S. issuers which
                                  are included in the Russell 2000
                                  Index at the time of investment.
                                  The Fund's investments are
                                  selected using both a variety of
                                  quantitative techniques and
                                  fundamental research in seeking
                                  to maximize the Fund's expected
                                  return, while maintaining risk,
                                  style, capitalization and
                                  industry characteristics similar
                                  to the Russell 2000 Index.
- ----------------------------------------------------------------------------------------
 CAPITAL     Long-term capital    At least 90% of total assets in a  S&P 500 Index
 GROWTH FUND growth.              diversified portfolio of equity
                                  securities. The Investment
                                  Adviser considers long-term
                                  capital appreciation potential in
                                  selecting investments.
- ----------------------------------------------------------------------------------------
 MID CAP     Long-term capital    At least 65% of total assets in    Russell Midcap
 EQUITY FUND appreciation.        equity securities of companies     Index
                                  with public stock market
                                  capitalizations within the range
                                  of the market capitalization of
                                  companies constituting the
                                  Russell Midcap Index at the time
                                  of investment (currently between
                                  $400 million and $16 billion)
                                  ("Mid-Cap Companies").
- ----------------------------------------------------------------------------------------
 SMALL CAP   Long-term capital    At least 65% of total assets in    Russell 2000
 VALUE FUND  growth.              equity securities of companies
                                  with public stock market
                                  capitalizations of $1 billion or
                                  less at the time of investment.
</TABLE>
 
 WHAT ARE THE RISK FACTORS AND SPECIAL CHARACTERISTICS THAT I SHOULD
CONSIDER BEFORE INVESTING?
 
  Each Fund's Share price will fluctuate with market, economic and, to the
extent applicable, foreign exchange conditions, so that an investment in
any of the Funds may be worth more or less when redeemed than when
purchased. None of the Funds should be relied upon as a complete investment
program. There can be no assurance that a Fund's investment objectives will
be achieved. See "Risk Factors."
 
                                       4
<PAGE>
 
 
  Risks of Investing in Small Capitalization Companies. To the extent that
a Fund invests in the securities of small market capitalization companies,
the Fund may be exposed to a higher degree of risk and price volatility.
Securities of such issuers may lack sufficient market liquidity to enable a
Fund to effect sales at an advantageous time or without a substantial drop
in price.
 
  Foreign Risks. Investments in securities of foreign issuers and
currencies involve risks that are different form those associated with
investments in domestic securities. The risks associated with foreign
investments and currencies include changes in relative currency exchange
rates, political and economic developments, the imposition of exchange
controls, confiscation and other governmental restrictions. Generally,
there is less availability of data on foreign companies and securities
markets as well as less regulation of foreign stock exchanges, brokers and
issuers. A Fund's investments in emerging markets and countries ("Emerging
Countries") involves greater risks than investments in the developed
countries of Western Europe, the United States, Canada, Australia, New
Zealand and Japan.
 
  Other. A Fund's use of certain investment techniques, including derivatives,
forward contracts, options and futures, will subject the Fund to greater risk
than funds that do not employ such techniques.
 
 WHO MANAGES THE FUNDS?
 
  Goldman Sachs Asset Management serves as Investment Adviser to the Balanced,
Growth and Income, CORE Large Cap Growth, CORE Small Cap Equity, Mid Cap Equity
and Small Cap Value Funds. Goldman Sachs Funds Management, L.P. serves as
Investment Adviser to the CORE U.S. Equity and Capital Growth Funds. As of July
24, 1998, the Investment Adviser, together with its affiliates, acted as
investment adviser or distributor for assets in excess of $168 billion.
 
 WHO DISTRIBUTES THE FUNDS' SHARES?
 
  Goldman Sachs acts as distributor of each Fund's Shares (the "Distributor").
 
 WHAT IS THE MINIMUM INVESTMENT?
 
<TABLE>
<CAPTION>
                                                                 MINIMUM
                                                           --------------------
                                                           INITIAL
                                                           PURCHASE ADDITIONAL
TYPE OF PURCHASE                                            AMOUNT  INVESTMENTS
- ----------------                                           -------- -----------
<S>                                                        <C>      <C>
Regular Purchases.........................................  $1,000      $50
Tax-Sheltered Retirement Plans (excluding SIMPLE IRAs and
 Education IRAs) and UGMA/UTMA Purchases..................  $  250      $50
SIMPLE IRAs and Education IRAs............................  $   50      $50
Automatic Investment Plan.................................  $   50      $50
403(b) Plans..............................................  $  200      $50
</TABLE>
 
  For further information, see "How to Invest--How to Buy Shares of the Funds"
on page 43.
 
 HOW DO I PURCHASE SHARES?
 
 
  You may purchase Shares of the Funds through Goldman Sachs and certain
investment dealers, including members of the National Association of Securities
Dealers, Inc. (the "NASD") and certain other financial service firms that have
agreements with Goldman Sachs relating to the sale of Shares ("Authorized
Dealers"). See "How to Invest" on page 42.
 
                                       5
<PAGE>
 
 
 WHAT ARE MY PURCHASE ALTERNATIVES?
 
 
  The Funds offer three classes of Shares through this Prospectus. These Shares
may be purchased, at the investor's choice, at a price equal to their next
determined net asset value ("NAV") (i) plus an initial sales charge imposed at
the time of purchase ("Class A Shares"); (ii) with a contingent deferred sales
charge ("CDSC") imposed on redemptions within six years of purchase ("Class B
Shares"); or (iii) without any initial sales charge or CDSC, as long as Shares
are held for one year or more ("Class C Shares"). Direct purchases of $1
million or more of Class A Shares will be sold without an initial sales charge
and may be subject to a CDSC at the time of certain redemptions.
 
<TABLE>
<CAPTION>
                            MAXIMUM INITIAL                   MAXIMUM CONTINGENT
   ALL FUNDS                 SALES CHARGE                   DEFERRED SALES CHARGE
   ---------                ---------------                 ---------------------
   <S>                      <C>             <C>
   Class A.................      5.5%                            (See above)
   Class B.................       N/A                 5% declining to 0% after six years
   Class C.................       N/A       1% if Shares are redeemed within 12 months of purchase
</TABLE>
 
  Over time, the CDSC and distribution and service fees attributable to Class B
or Class C Shares will exceed the initial sales charge and the distribution and
service fees attributable to Class A Shares. Class B Shares convert to Class A
Shares, which are subject to lower distribution and service fees, eight years
after initial purchase. Class C Shares, which are subject to the same
distribution and service fees as Class B Shares, do not convert to Class A
Shares and are subject to the higher distribution and service fees
indefinitely. See "How to Invest--Alternative Purchase Arrangements" on page
42.
 
 HOW DO I SELL MY SHARES?
 
 
  You may redeem Shares upon request on any Business Day, as defined under
"Additional Information," at the NAV next determined after receipt of such
request in proper form, subject to any applicable CDSC. See "How to Sell Shares
of the Funds."
 
 HOW DO I RECEIVE DIVIDENDS AND DISTRIBUTIONS?
 
 
<TABLE>
<CAPTION>
                                       INVESTMENT INCOME DIVIDENDS CAPITAL GAINS
FUND                                        DECLARED AND PAID      DISTRIBUTIONS
- ----                                   --------------------------- -------------
<S>                                    <C>                         <C>
Balanced..............................          Quarterly            Annually
Growth and Income.....................          Quarterly            Annually
CORE U.S. Equity......................           Annually            Annually
CORE Large Cap Growth.................           Annually            Annually
CORE Small Cap Equity.................           Annually            Annually
Capital Growth........................           Annually            Annually
Mid Cap Equity........................           Annually            Annually
Small Cap Value.......................           Annually            Annually
</TABLE>
 
  You may receive dividends and distributions in additional Shares of the same
class of the Fund in which you have invested or you may elect to receive them
in cash, Shares of the same class of other mutual funds sponsored by Goldman
Sachs (the "Goldman Sachs Funds") or ILA Service Units of the Prime Obligations
Portfolio or the Tax-Exempt Diversified Portfolio, if you hold Class A Shares
of a Fund, or ILA Class B or Class C Units of the Prime Obligations Portfolio,
if you hold Class B or Class C Shares of a Fund (the "ILA Portfolios"). For
further information concerning dividends and distributions, see "Dividends."
 
                                       6
<PAGE>
 
 
                               FEES AND EXPENSES
 
<TABLE>
<CAPTION>
                                                           GROWTH
                                                             AND                           CORE U.S.
                         BALANCED                          INCOME                           EQUITY
                           FUND                             FUND                             FUND
                  -----------------------------    -----------------------------    -----------------------------
                  CLASS A    CLASS B    CLASS C    CLASS A    CLASS B    CLASS C    CLASS A    CLASS B    CLASS C
                  -------    -------    -------    -------    -------    -------    -------    -------    -------
<S>               <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
SHAREHOLDER TRANSACTION EXPENSES:
 Maximum Sales
  Charge Imposed
  on Purchases...   5.5%/1/   none       none        5.5%/1/   none       none        5.5%/1/   none       none
 Maximum Sales
  Charge Imposed
  on Reinvested
  Dividends......  none       none       none       none       none       none       none       none       none
 Maximum Deferred
  Sales Charge...  none/1/     5.0%/2/    1.0%/3/   none/1/     5.0%/2/    1.0%/3/   none/1/     5.0%/2/    1.0%/3/
 Redemption
  Fees/4/........  none       none       none       none       none       none       none       none       none
 Exchange
  Fees/4/........  none       none       none       none       none       none       none       none       none
ANNUAL FUND OPERATING EXPENSES:
 (as a percentage of average daily net assets)/5/
 Management Fees
  (after
  applicable
  limitations)/6/. 0.65%      0.65%      0.65%      0.70%      0.70%      0.70%      0.70%      0.70%      0.70%
 Distribution and
  Service Fees...  0.25%      1.00%      1.00%      0.25%      1.00%      1.00%      0.25%      1.00%      1.00%
 Other Expenses
  (after
  applicable
  limitations)/7/. 0.20%      0.20%      0.20%      0.24%      0.24%      0.24%      0.19%      0.19%      0.19%
                   ----       ----       ----       ----       ----       ----       ----       ----       ----
TOTAL FUND
 OPERATING
 EXPENSES (AFTER
 FEE AND EXPENSE
 LIMITATIONS)/8/.  1.10%      1.85%      1.85%      1.19%      1.94%      1.94%      1.14%      1.89%      1.89%
                   ====       ====       ====       ====       ====       ====       ====       ====       ====
<CAPTION>
                           CORE                             CORE
                         LARGE CAP                        SMALL CAP
                        GROWTH FUND                      EQUITY FUND
                  -------------------------------- --------------------------------
                  CLASS A    CLASS B    CLASS C    CLASS A    CLASS B    CLASS C
                  ---------- ---------- ---------- ---------- ---------- ----------
<S>               <C>        <C>        <C>        <C>        <C>        <C>
SHAREHOLDER TRANSACTION EXPENSES:
 Maximum Sales
  Charge Imposed
  on Purchases...   5.5%/1/   none       none        5.5%/1/   none       none
 Maximum Sales
  Charge Imposed
  on Reinvested
  Dividends......  none       none       none       none       none       none
 Maximum Deferred
  Sales Charge...  none/1/     5.0%/2/    1.0%/3/   none/1/     5.0%/2/    1.0%/3/
 Redemption
  Fees/4/........  none       none       none       none       none       none
 Exchange
  Fees/4/........  none       none       none       none       none       none
ANNUAL FUND OPERATING EXPENSES:
 (as a percentage of average daily net assets)/5/
 Management Fees
  (after
  applicable
  limitations)/6/. 0.60%      0.60%      0.60%      0.85%      0.85%      0.85%
 Distribution and
  Service Fees...  0.25%      1.00%      1.00%      0.25%      1.00%      1.00%
 Other Expenses
  (after
  applicable
  limitations)/7/. 0.19%      0.19%      0.19%      0.23%      0.23%      0.23%
                  ---------- ---------- ---------- ---------- ---------- ----------
TOTAL FUND
 OPERATING
 EXPENSES (AFTER
 FEE AND EXPENSE
 LIMITATIONS)/8/.  1.04%      1.79%      1.79%      1.33%      2.08%      2.08%
                  ========== ========== ========== ========== ========== ==========
</TABLE>
 
                                       7
<PAGE>
 
 
                         FEES AND EXPENSES (CONTINUED)
 
<TABLE>
<CAPTION>
                                                                                                     SMALL
                                  CAPITAL                          MID CAP                            CAP
                                  GROWTH                           EQUITY                            VALUE
                                   FUND                              FUND                            FUND
                          -----------------------------    -----------------------------    -----------------------------
                          CLASS A    CLASS B    CLASS C    CLASS A    CLASS B    CLASS C    CLASS A    CLASS B    CLASS C
                          -------    -------    -------    -------    -------    -------    -------    -------    -------
<S>                       <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
SHAREHOLDER TRANSACTION
EXPENSES:
 Maximum Sales Charge
 Imposed on Purchases....   5.5%/1/   none       none        5.5%/1/   none       none        5.5%/1/   none       none
 Maximum Sales Charge
 Imposed on Reinvested
 Dividends...............  none       none       none       none       none       none       none       none       none
 Maximum Deferred Sales
 Charge..................  none/1/     5.0%/2/    1.0%/3/   none/1/     5.0%/2/    1.0%/3/   none/1/     5.0%/2/    1.0%/3/
 Redemption Fees/4/......  none       none       none       none       none       none       none       none       none
 Exchange Fees/4/........  none       none       none       none       none       none       none       none       none
ANNUAL FUND OPERATING
EXPENSES: (as a
percentage of average
daily net assets)/5/
 Management Fees (after
 applicable limitations).  1.00%      1.00%      1.00%      0.75%      0.75%      0.75%      1.00%      1.00%      1.00%
 Distribution and Service
 Fees....................  0.25%      1.00%      1.00%      0.25%      1.00%      1.00%      0.25%      1.00%      1.00%
 Other Expenses (after
 applicable
 limitations)/7/.........  0.19%      0.19%      0.19%      0.29%      0.29%      0.29%      0.25%      0.25%      0.25%
                           ----       ----       ----       ----       ----       ----       ----       ----       ----
TOTAL FUND OPERATING
EXPENSES (AFTER FEE AND
EXPENSE LIMITATIONS)/8/..  1.44%      2.19%      2.19%      1.29%      2.04%      2.04%      1.50%      2.25%      2.25%
                           ====       ====       ====       ====       ====       ====       ====       ====       ====
</TABLE>
- ----
/1/ As a percentage of the offering price. No sales charge is imposed on
    purchases of Class A Shares by certain classes of investors. A CDSC of
    1.00% is imposed on certain redemptions (within 18 months of purchase) of
    Class A Shares sold without an initial sales charge as part of an
    investment of $1 million or more. See "How to Invest--Offering Price--
    Class A Shares."
/2/ A CDSC is imposed upon Shares redeemed within six years of purchase at a
    rate of 5% in the first year, declining to 1% in the sixth year, and
    eliminated thereafter. See "How to Invest--Offering Price--Class B
    Shares."
/3/ A CDSC of 1.00% is imposed on Shares redeemed within 12 months of
    purchase. See "How to Invest--Offering Price--Class C Shares."
/4/ A transaction fee of $7.50 may be charged for redemption proceeds paid by
    wire. In addition to free reinvestments of dividends and distributions in
    Shares of other Goldman Sachs Funds or units of the ILA Portfolios and
    free automatic exchanges pursuant to the Automatic Exchange Program, six
    free exchanges are permitted in each twelve month period. A fee of $12.50
    may be charged for each subsequent exchange during such period. See "How
    to Invest--Exchange Privilege."
/5/ The Funds' annual operating expenses have been restated to reflect fees
    and expenses in effect as of September 1, 1998.
/6/ The Investment Adviser has voluntarily agreed not to impose a portion of
    the management fee on the CORE U.S. Equity and CORE Large Cap Growth Funds
    equal to 0.05% and 0.15%, respectively. Without such limitations,
    management fees would be 0.75% of each Fund's average daily net assets.
/7/ The Investment Adviser has voluntarily agreed to reduce or limit certain
    other expenses (excluding management, distribution and service fees,
    transfer agency fees (equal to 0.19% of the average daily net assets of
    each Fund's Class A, B and C Shares), taxes, interest and brokerage fees
    and litigation, indemnification and other extraordinary expenses) for each
    Fund to the extent such expenses exceed the following percentages of
    average daily net assets:
 
<TABLE>
<CAPTION>
                                                                         OTHER
                                                                        EXPENSES
                                                                        --------
      <S>                                                               <C>
      Balanced.........................................................  0.01%
      Growth and Income................................................  0.05%
      CORE U.S. Equity.................................................  0.00%
      CORE Large Cap Growth............................................  0.00%
      CORE Small Cap Equity............................................  0.04%
      Capital Growth...................................................  0.00%
      Mid Cap Equity...................................................  0.10%
      Small Cap Value..................................................  0.06%
</TABLE>
 
                                       8
<PAGE>
 
/8/ Without the limitations described above, "Other Expenses" and "Total
    Operating Expenses" of the Funds would be as set forth below:
 
<TABLE>
<CAPTION>
                                                                         TOTAL
                                                               OTHER   OPERATING
                                                              EXPENSES EXPENSES
                                                              -------- ---------
      <S>                                                     <C>      <C>
      Balanced
        Class A..............................................  0.43%     1.33%
        Class B..............................................  0.43%     2.08%
        Class C..............................................  0.43%     2.08%
      Growth and Income
        Class A..............................................  0.27%     1.22%
        Class B..............................................  0.27%     1.97%
        Class C..............................................  0.27%     1.97%
      CORE U.S. Equity
        Class A..............................................  0.27%     1.27%
        Class B..............................................  0.27%     2.02%
        Class C..............................................  0.27%     2.02%
      CORE Large Cap Growth
        Class A..............................................  0.37%     1.37%
        Class B..............................................  0.37%     2.12%
        Class C..............................................  0.37%     2.12%
      CORE Small Cap Equity
        Class A..............................................  0.63%     1.73%
        Class B..............................................  0.63%     2.48%
        Class C..............................................  0.63%     2.48%
      Capital Growth
        Class A..............................................  0.25%     1.50%
        Class B..............................................  0.25%     2.25%
        Class C..............................................  0.25%     2.25%
      Mid Cap Equity
        Class A..............................................  0.31%     1.31%
        Class B..............................................  0.31%     2.06%
        Class C..............................................  0.31%     2.06%
      Small Cap Value
        Class A..............................................  0.28%     1.53%
        Class B..............................................  0.28%     2.28%
        Class C..............................................  0.28%     2.28%
</TABLE>
 
EXAMPLE
 
  You would pay the following expenses on a hypothetical $1,000 investment
(including the maximum sales charge) assuming (i) a 5% annual return; and (ii)
redemption at the end of each time period.
 
<TABLE>
<CAPTION>
    FUND                                         1 YEAR 3 YEARS 5 YEARS 10 YEARS
    ----                                         ------ ------- ------- --------
<S>                                              <C>    <C>     <C>     <C>
Balanced Fund
 Class A Shares................................   $66     $88    $112     $182
 Class B Shares
 --Assuming complete redemption at end of peri-
  od...........................................    66      86     119      197
 --Assuming no redemption......................    19      58     100      197
 Class C Shares
 --Assuming complete redemption at end of peri-
  od...........................................    28      58     100      217
 --Assuming no redemption......................    19      58     100      217
</TABLE>
 
                                       9
<PAGE>
 
<TABLE>
<CAPTION>
    FUND                                         1 YEAR 3 YEARS 5 YEARS 10 YEARS
    ----                                         ------ ------- ------- --------
<S>                                              <C>    <C>     <C>     <C>
Growth and Income Fund
 Class A Shares................................   $66     $91    $117     $191
 Class B Shares
 --Assuming complete redemption at end of
  period.......................................    67      89     124      207
 --Assuming no redemption......................    20      61     105      207
 Class C Shares
 --Assuming complete redemption at end of
  period.......................................    29      61     105      226
 --Assuming no redemption......................    20      61     105      226
CORE U.S. Equity Fund
 Class A Shares................................    66      89     114      186
 Class B Shares
 --Assuming complete redemption at end of
  period.......................................    66      87     121      201
 --Assuming no redemption......................    19      59     102      201
 Class C Shares
 --Assuming complete redemption at end of
  period.......................................    28      59     102      221
 --Assuming no redemption......................    19      59     102      221
CORE Large Cap Growth Fund
 Class A Shares................................    65      86     109      175
 Class B Shares
 --Assuming complete redemption at end of
  period.......................................    65      84     116      191
 --Assuming no redemption......................    18      56      97      191
 Class C Shares
 --Assuming complete redemption at end of
  period.......................................    27      56      97      211
 --Assuming no redemption......................    18      56      97      211
CORE Small Cap Equity Fund
 Class A Shares................................    68      95     124      206
 Class B Shares
 --Assuming complete redemption at end of
  period.......................................    68      93     131      222
 --Assuming no redemption......................    21      65     112      222
 Class C Shares
 --Assuming complete redemption at end of
  period.......................................    30      65     112      241
 --Assuming no redemption......................    21      65     112      241
Capital Growth Fund
 Class A Shares................................    69      98     129      218
 Class B Shares
 --Assuming complete redemption at end of
  period.......................................    69      97     136      233
 --Assuming no redemption......................    22      69     117      233
 Class C Shares
 --Assuming complete redemption at end of
  period.......................................    31      69     117      252
 --Assuming no redemption......................    22      69     117      252
Mid Cap Equity Fund
 Class A Shares................................    68      92     129      218
 Class B Shares
 --Assuming complete redemption at end of
  period.......................................    68      92     129      218
 --Assuming no redemption......................    21      64     110      218
 Class C Shares
 --Assuming complete redemption at end of
  period.......................................    30      64     110      237
 --Assuming no redemption......................    21      64     110      237
Small Cap Value Fund
 Class A Shares................................    69     100     132      224
 Class B Shares
 --Assuming complete redemption at end of
  period.......................................    70      98     139      240
 --Assuming no redemption......................    23      70     120      240
 Class C Shares
 --Assuming complete redemption at end of
  period.......................................    32      70     120      258
 --Assuming no redemption......................    23      70     120      258
</TABLE>
 
 
                                       10
<PAGE>
 
  The hypothetical example assumes that a CDSC will not apply to redemptions
of Class A Shares within the first 18 months. Class B Shares convert to Class
A Shares eight years after purchase; therefore, Class A expenses are used in
the hypothetical example after year eight.
 
  The Investment Adviser and Goldman Sachs may modify or discontinue any of
the limitations set forth above in the future at their discretion. The
information set forth in the foregoing table and hypothetical example relates
only to Class A, B and C Shares. Each Fund also offers Institutional and
Service Shares, which are subject to different fees and expenses (which affect
performance), have different minimum investment requirements and are entitled
to different services than Class A, Class B and Class C Shares. Information
regarding Institutional and Service Shares may be obtained from your sales
representative or from Goldman Sachs by calling the number on the back cover
page of this Prospectus. Because of the Distribution and Service Plans, long-
term shareholders may pay more than the economic equivalent of the maximum
front-end sales charges permitted by the NASD's rules regarding investment
companies.
 
  In addition to the compensation itemized above, certain institutions that
sell Fund Shares and/or their salespersons may receive other compensation in
connection with the sale and distribution of Class A, Class B and Class C
Shares of the Funds or for services to their customers' accounts and/or the
Funds. For additional information regarding such compensation, see
"Management" and "Services Available to Shareholders" in this Prospectus and
"Other Information Regarding Purchases, Redemptions, Exchanges and Dividends"
in the Additional Statement.
 
  The purpose of the foregoing table is to assist investors in understanding
the various fees and expenses of a Fund that an investor will bear directly or
indirectly. The information on the fees and expenses included in the table and
hypothetical example above are based on each Fund's fees and expenses (actual
or estimated) and should not be considered as representative of past or future
expenses. Actual fees and expenses may be greater or less than those
indicated. Moreover, while the example assumes a 5% annual return, a Fund's
actual performance will vary and may result in an actual return greater or
less than 5%. See "Management--Investment Advisers."
 
                                      11
<PAGE>
 
 
                             FINANCIAL HIGHLIGHTS
 
 
         SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD
 
  The following data have been audited by Arthur Andersen LLP, independent
public accountants, as indicated in their report incorporated by reference
into the Additional Statement from the Annual Report to shareholders of the
Funds for the year ended January 31, 1998 (the "Annual Report"). This
information should be read in conjunction with the financial statements and
related notes incorporated by reference and attached to the Additional
Statement. The Annual Report also contains performance information and is
available upon request and without charge by calling the telephone number or
writing to one of the addresses on the back cover of this Prospectus.
 
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                  INCOME FROM                        DISTRIBUTIONS TO
                           INVESTMENT OPERATIONS(E)                    SHAREHOLDERS
                           ------------------------- ------------------------------------------------
                                       NET REALIZED                                      IN EXCESS OF
                                      AND UNREALIZED                         FROM NET    NET REALIZED     NET
                 NET ASSET               GAIN ON        FROM    IN EXCESS  REALIZED GAIN   GAIN ON     INCREASE   NET ASSET
                  VALUE,      NET       INVESTMENT      NET       OF NET   ON INVESTMENT  INVESTMENT  (DECREASE)   VALUE,
                 BEGINNING INVESTMENT  AND FUTURES   INVESTMENT INVESTMENT  AND FUTURES  AND FUTURES    IN NET     END OF
                 OF PERIOD   INCOME    TRANSACTIONS    INCOME     INCOME   TRANSACTIONS  TRANSACTIONS ASSET VALUE  PERIOD
                 --------- ---------- -------------- ---------- ---------- ------------- ------------ ----------- ---------
                                                                                                             BALANCED FUND
- ---------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>        <C>        <C>           <C>          <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $18.78     $0.57        $2.66        $(0.56)    $ --        $(1.16)       $ --         $1.51     $20.29
1998--Class B
Shares..........   18.73      0.50         2.57         (0.42)    (0.02)       (1.16)         --          1.47      20.20
1998--Class C
Shares(b).......   21.10      0.25         0.24         (0.22)    (0.04)       (0.64)       (0.52)       (0.93)     20.17
1998--Institu-
tional
Shares(b).......   21.18      0.26         0.32         (0.23)    (0.08)       (0.45)       (0.71)       (0.89)     20.29
1998--Service
Shares(b).......   21.18      0.22         0.32         (0.22)    (0.06)       (0.72)       (0.44)       (0.90)     20.28
- ---------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   17.31      0.66         2.47         (0.66)      --         (1.00)         --          1.47      18.78
1997--Class B
Shares(b).......   17.46      0.42         2.34         (0.42)    (0.07)       (1.00)         --          1.27      18.73
- ---------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   14.22      0.51         3.43         (0.50)      --         (0.35)         --          3.09      17.31
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1995--Class A
Shares(b).......   14.18      0.10         0.02         (0.08)      --           --           --          0.04      14.22
<CAPTION>
                                                                                        RATIOS ASSUMING
                                                                                      NO VOLUNTARY WAIVER
                                                                                           OF FEES OR
                                                                                      EXPENSE LIMITATIONS
                                                                                    ------------------------
                                                                         RATIO OF                RATIO OF
                                                    NET      RATIO OF       NET                     NET
                                                 ASSETS AT      NET     INVESTMENT   RATIO OF   INVESTMENT
                            PORTFOLIO  AVERAGE     END OF   EXPENSES TO  INCOME TO   EXPENSES  INCOME (LOSS)
                   TOTAL    TURNOVER  COMMISSION   PERIOD   AVERAGE NET AVERAGE NET TO AVERAGE  TO AVERAGE
                 RETURN(A)   RATE(G)   RATE(F)   (IN 000'S)   ASSETS      ASSETS    NET ASSETS  NET ASSETS
                 ---------- --------- ---------- ---------- ----------- ----------- ---------- -------------
- ---------------------------------------------------------------------------------------------------------------------------
<S>              <C>        <C>       <C>        <C>        <C>         <C>         <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........   17.54%    190.43%    $.0590    $163,636     1.00%       2.94%       1.57%        2.37%
1998--Class B
Shares..........   16.71     190.43      .0590      23,639     1.76        2.14        2.07         1.83
1998--Class C
Shares(b).......    2.49(d)  190.43      .0590       8,850     1.77(c)     2.13(c)     2.08(c)      1.82(c)
1998--Institu-
tional
Shares(b).......    2.93(d)  190.43      .0590       8,367     0.76(c)     3.13(c)     1.07(c)      2.82(c)
1998--Service
Shares(b).......    2.66(d)  190.43      .0590          16     1.26(c)     2.58(c)     1.57(c)      2.27(c)
- ---------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   18.59     208.11      .0587      81,410     1.00        3.76        1.77         2.99
1997--Class B
Shares(b).......   16.22(d)  208.11      .0587       2,110     1.75(c)     2.59(c)     2.27(c)      2.07(c)
- ---------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   28.10     197.10        --       50,928     1.00        3.65        1.90         2.75
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1995--Class A
Shares(b).......    0.87(d)   14.71        --        7,510     1.00(c)     3.39(c)     8.29(c)     (3.90)(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the
    investment at the NAV at the end of the period and no sales or redemption
    charges. Total return would be reduced if a sales or redemption charge
    were taken into account.
(b) Class A and Class B Share activity commenced on October 12, 1994 and May
    1, 1996, respectively. Class C, Institutional and Service Share activity
    commenced on August 15, 1997.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a Fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
(g) Includes the effect of mortgage dollar roll transactions.
 
                                       12
<PAGE>
 
<TABLE>
<CAPTION>
                              INCOME (LOSS) FROM
                           INVESTMENT OPERATIONS(E)                        DISTRIBUTIONS TO SHAREHOLDERS
                           --------------------------------       ------------------------------------------------
                                                   NET                                                IN EXCESS OF
                                              REALIZED AND                                FROM NET    NET REALIZED
                 NET ASSET     NET             UNREALIZED            FROM    IN EXCESS  REALIZED GAIN   GAIN ON
                  VALUE,   INVESTMENT            GAIN ON             NET       OF NET   ON INVESTMENT  INVESTMENT  ADDITIONAL
                 BEGINNING   INCOME            INVESTMENTS        INVESTMENT INVESTMENT  AND FUTURES  AND FUTURES   PAID-IN
                 OF PERIOD   (LOSS)            AND FUTURES          INCOME     INCOME   TRANSACTIONS  TRANSACTIONS  CAPITAL
                 --------- ------------       -------------       ---------- ---------- ------------- ------------ ----------
- -----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>                <C>                 <C>        <C>        <C>           <C>          <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $23.18     $       0.11        $       5.27       $(0.11)    $  --       $(2.52)       $  --       $ --
1998--Class B
Shares..........   23.10             0.04                5.14          --       (0.03)      (2.45)        (0.07)       --
1998--Class C
Shares(b).......   28.20            (0.01)               0.06          --       (0.03)      (1.42)        (1.10)       --
1998--
Institutional
Shares..........   23.19             0.27                5.23        (0.22)       --        (0.24)        (2.28)       --
1998--Service
Shares..........   23.17             0.14                5.23        (0.06)     (0.04)      (2.52)          --         --
- -----------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   19.98             0.35                5.18        (0.35)     (0.01)      (1.97)          --         --
1997--Class B
Shares(b).......   20.82             0.17                4.31        (0.17)     (0.06)      (1.97)          --         --
1997--Institu-
tional
Shares(b).......   21.25             0.29                3.96        (0.30)     (0.04)      (1.97)          --         --
1997--Service
Shares(b).......   20.71             0.28                4.50        (0.28)     (0.07)      (1.97)          --         --
- -----------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   15.80             0.33                4.75        (0.30)       --        (0.60)          --         --
- -----------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   15.79             0.20(g)             0.30(g)     (0.20)     (0.07)      (0.33)          --        0.11(g)
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1994--Class A
Shares(b).......   14.18             0.15                1.68        (0.15)     (0.01)      (0.06)          --         --
<CAPTION>
                                                                                                                 RATIOS ASSUMING
                                                                                                               NO VOLUNTARY WAIVER
                                                                                                                   OF FEES OR
                                                                                                               EXPENSE LIMITATIONS
                                                                                                           -------------------------
                                                                                                  RATIO
                                                                                                 OF NET                     RATIO
                     NET                                                  NET        RATIO     INVESTMENT                  OF NET
                  INCREASE   NET ASSET                                 ASSETS AT    OF NET    INCOME (LOSS)    RATIO     INVESTMENT
                 (DECREASE)   VALUE,              PORTFOLIO  AVERAGE     END OF   EXPENSES TO  TO AVERAGE  OF EXPENSES INCOME (LOSS)
                   IN NET     END OF     TOTAL    TURNOVER  COMMISSION   PERIOD   AVERAGE NET      NET      TO AVERAGE   TO AVERAGE
                 ASSET VALUE  PERIOD   RETURN(A)    RATE     RATE(F)   (IN 000S)    ASSETS       ASSETS     NET ASSETS   NET ASSETS
                 ----------- --------- ---------- --------- ---------- ---------- ----------- ------------- ----------- -----------
                   GROWTH AND INCOME FUND
- -----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>         <C>       <C>        <C>       <C>        <C>        <C>         <C>           <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........    $2.75     $25.93     23.71%     61.95%    $.0590   $1,216,582    1.25%         0.43%       1.42%     0.26%
1998--Class B                                                                                                           
Shares..........     2.63      25.73     22.87      61.95      .0590      307,815    1.94         (0.35)       1.94     (0.35)
1998--Class C                                                                                                           
Shares(b).......    (2.50)     25.70      0.51(d)   61.95      .0590       31,686    1.99(c)      (0.48)(c)    1.99(c)  (0.48)(c)
1998--                                                                                                                  
Institutional                                                                                                           
Shares..........     2.76      25.95     24.24      61.95      .0590       36.225    0.83          0.76        0.83      0.76
1998--Service                                                                                                           
Shares..........     2.75      25.92     23.63      61.95      .0590        8,893    1.32          0.32        1.32      0.32
- -------------------------------------------------------------------------------------------------------------------------------
1997--Class A                                                                                                           
Shares..........     3.20      23.18     28.42      53.03      .0586      615,103    1.22          1.60        1.43      1.39
1997--Class B                                                                                                           
Shares(b).......     2.28      23.10     22.23(d)   53.03      .0586       17,346    1.93(c)       0.15(c)     1.93(c)   0.15(c)
1997--Institu-                                                                                                          
tional                                                                                                                  
Shares(b).......     1.94      23.19     20.77(d)   53.03      .0586          193    0.82(c)       1.36(c)     0.82(c)   1.36(c)
1997--Service                                                                                                           
Shares(b).......     2.46      23.17     23.87(d)   53.03      .0586        3,174    1.32(c)       0.94(c)     1.32(c)   0.94(c)
- -------------------------------------------------------------------------------------------------------------------------------
1996--Class A                                                                                                           
Shares..........     4.18      19.98     32.45      57.93        --       436,757    1.20          1.67        1.45      1.42
- -------------------------------------------------------------------------------------------------------------------------------
1995--Class A                                                                                                           
Shares..........     0.01      15.80      3.97      71.80        --       193,772    1.25          1.28        1.58      0.95
FOR THE PERIOD ENDED JANUARY 31,                                                                                        
- --------------------------------                                                                                        
1994--Class A                                                                                                           
Shares(b).......     1.61      15.79     13.08(d)  102.23        --        41,528    1.25(c)       1.23(c)     3.24(c)  (0.76)(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the
    investment at the NAV at the end of the period and no sales or redemption
    charges. Total return would be reduced if a sales or redemption charge
    were taken into account.
(b) Class A, Class B, Class C, Institutional and Service Share activity
    commenced on February 5, 1993, May 1, 1996, August 15, 1997, June 3, 1996
    and March 6, 1996, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
(g) Calculated based on the average Shares outstanding methodology.
 
                                       13
<PAGE>
 
<TABLE>
<CAPTION>
                                  INCOME FROM                       DISTRIBUTIONS TO
                           INVESTMENT OPERATIONS(E)                   SHAREHOLDERS
                           ------------------------- -----------------------------------------------
                                                                             FROM NET   IN EXCESS OF    NET
                                       NET REALIZED                          REALIZED   NET REALIZED INCREASE/   NET
                 NET ASSET            AND UNREALIZED            IN EXCESS    GAIN ON      GAIN ON    (DECREASE) ASSET
                  VALUE,      NET     GAIN (LOSS) ON  FROM NET    OF NET    INVESTMENT   INVESTMENT    IN NET   VALUE,
                 BEGINNING INVESTMENT  INVESTMENTS   INVESTMENT INVESTMENT AND FUTURES  AND FUTURES    ASSET    END OF   TOTAL
                 OF PERIOD   INCOME    AND FUTURES     INCOME     INCOME   TRANSACTIONS TRANSACTIONS   VALUE    PERIOD RETURN(A)
                 --------- ---------- -------------- ---------- ---------- ------------ ------------ ---------- ------ ---------
                                                                                                CORE U.S. EQUITY FUND
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>        <C>        <C>          <C>          <C>        <C>    <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $23.32     $0.11        $5.63        $(0.12)    $  --       $(2.35)      $   --      $3.27    $26.59   24.96 %
1998--Class B
Shares..........   23.18      0.11         5.44           --       (0.06)      (2.00)        (.35)      3.14     26.32   24.28
1998--Class C
Shares(b).......   27.48      0.03         1.22           --       (0.14)      (0.67)       (1.68)     (1.24)    26.24    4.85(d)
1998--Institu-
tional Shares...   23.44      0.30         5.65         (0.24)     (0.01)      (1.33)       (1.02)      3.35     26.79   25.76
1998--Service
Shares..........   23.27      0.19         5.57         (0.07)     (0.08)      (2.35)         --        3.26     26.53   25.11
- ---------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   19.66      0.16         4.46         (0.16)       --        (0.80)         --        3.66     23.32   23.75
1997--Class B
Shares(b).......   20.44      0.04         3.70         (0.04)     (0.16)      (0.80)         --        2.74     23.18   18.59(d)
1997--Institu-
tional Shares...   19.71      0.30         4.51         (0.28)       --        (0.80)         --        3.73     23.44   24.63
1997--Service
Shares(b).......   21.02      0.13         3.15         (0.13)     (0.10)      (0.80)         --        2.25     23.27   15.92(d)
- ---------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   14.61      0.19         5.43         (0.16)       --        (0.41)         --        5.05     19.66   38.63
1996--Institu-
tional
Shares(b).......   16.97      0.16         3.23         (0.24)       --        (0.41)         --        2.74     19.71   20.14(d)
- ---------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   15.93      0.20        (0.38)        (0.20)       --        (0.94)         --       (1.32)    14.61   (1.10)
- ---------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   15.46      0.17         2.08         (0.17)       --        (1.61)         --        0.47     15.93   15.12
- ---------------------------------------------------------------------------------------------------------------------------------
1993--Class A
Shares..........   15.05      0.22         0.41         (0.22)       --          --           --        0.41     15.46    4.30
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1992--Class A
Shares(b).......   14.17      0.11         0.88         (0.11)        --         --           --        0.88     15.05    7.01(d)
<CAPTION>
                                                                          RATIOS ASSUMING
                                                                        NO VOLUNTARY WAIVER
                                                                            OF FEES OR
                                                                        EXPENSE LIMITATIONS
                                                                        ----------------------
                                                RATIO OF    RATIO OF               RATIO OF
                                                  NET         NET       RATIO OF     NET
                                         NET    EXPENSES   INVESTMENT   EXPENSES  INVESTMENT
                                      ASSETS AT    TO        INCOME        TO      INCOME
                 PORTFOLIO  AVERAGE    END OF   AVERAGE    (LOSS) TO    AVERAGE   (LOSS) TO
                 TURNOVER  COMMISSION  PERIOD     NET       AVERAGE       NET      AVERAGE
                   RATE     RATE(F)   (IN 000S)  ASSETS    NET ASSETS    ASSETS   NET ASSETS
                 --------- ---------- --------- ---------- ------------ --------- ------------
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>       <C>        <C>          <C>       <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........   65.89%    $.0651   $398,393     1.28%      0.51%       1.47%      0.32%
1998--Class B
Shares..........   65.89      .0651     59,208     1.79      (0.05)       1.96      (0.22)
1998--Class C
Shares(b).......   65.89      .0651      6,267     1.78(c)   (0.21)(c)    1.95(c)   (0.38)(c)
1998--Institu-
tional Shares...   65.89      .0651    202,893     0.65       1.16        0.82       0.99
1998--Service
Shares..........   65.89      .0651      7,841     1.15       0.62        1.32       0.45
- ---------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   37.78      .0417    225,968     1.29       0.91        1.53       0.67
1997--Class B
Shares(b).......   37.28      .0417     17,258     1.83(c)    0.06(c)     2.00(c)   (0.11)(c)
1997--Institu-
tional Shares...   37.28      .0417    148,942     0.65       1.52        0.85       1.32
1997--Service
Shares(b).......   37.28      .0417      3,666     1.15(c)    0.69(c)     1.35(c)    0.49(c)
- ---------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   39.35        --     129,045     1.25       1.01        1.55       0.71
1996--Institu-
tional
Shares(b).......   39.35        --      64,829     0.65(c)    1.49(c)     0.96(c)    1.18(c)
- ---------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   56.18        --      94,968     1.38       1.33        1.63       1.08
- ---------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   87.73        --      92,769     1.42       0.92        1.67       0.67
- ---------------------------------------------------------------------------------------------------------------------------------
1993--Class A
Shares..........  144.93        --     117,757     1.28       1.30        1.53       1.05
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1992--Class A
Shares(b).......  135.02        --     151,142   1.57(c)      1.24(c)     1.82(c)    0.99(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the investment
    at the NAV at the end of the period and no sales or redemption charges.
    Total return would be reduced if a sales or redemption charge were taken
    into account.
(b) Class A, Class B, Class C, Institutional and Service Share activity
    commenced on May 24, 1991, May 1, 1996, August 15, 1997, June 15, 1995 and
    June 7, 1996, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
                                       14
<PAGE>
 
 
<TABLE>
<CAPTION>
                                  INCOME FROM                       DISTRIBUTIONS TO
                           INVESTMENT OPERATIONS(E)                   SHAREHOLDERS
                           ------------------------- -----------------------------------------------
                                           NET                               FROM NET   IN EXCESS OF
                                       REALIZED AND                          REALIZED   NET REALIZED
                 NET ASSET    NET       UNREALIZED      FROM    IN EXCESS    GAIN ON      GAIN ON        NET     NET ASSET
                  VALUE,   INVESTMENT GAIN (LOSS) ON    NET       OF NET    INVESTMENT   INVESTMENT   INCREASE    VALUE,
                 BEGINNING   INCOME    INVESTMENTS   INVESTMENT INVESTMENT AND FUTURES  AND FUTURES    IN NET     END OF
                 OF PERIOD   (LOSS)    AND FUTURES     INCOME     INCOME   TRANSACTIONS TRANSACTIONS ASSET VALUE  PERIOD
                 --------- ---------- -------------- ---------- ---------- ------------ ------------ ----------- ---------
                                                                                     CORE LARGE CAP GROWTH FUND
- -------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>        <C>        <C>          <C>          <C>         <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......  $10.00     $0.01        $2.35        $(0.01)      --        $(0.32)      $(0.06)      $1.97     $11.97
1998--Class B
Shares(b).......   10.00     (0.03)        2.33           --        --         (0.18)       (0.20)       1.92      11.92
1998--Class C
Shares(b).......   11.80     (0.02)        0.54           --      (0.01)       (0.38)         --         0.13      11.93
1998--Institu-
tional
Shares(b).......   10.00      0.01         2.35         (0.01)      --         (0.19)       (0.19)       1.97      11.97
1998--Service
Shares (b)......   10.00     (0.02)        2.35           --        --         (0.08)       (0.30)       1.95      11.95
<CAPTION>
                                                                                          RATIOS ASSUMING NO
                                                                                       VOLUNTARY WAIVER OF FEES
                                                                                        OR EXPENSE LIMITATIONS
                                                                                       ----------------------------------------
                                                                                                              RATIO
                                                     NET       RATIO     RATIO OF NET                        OF NET
                                                  ASSETS AT    OF NET     INVESTMENT     RATIO OF          INVESTMENT
                             PORTFOLIO  AVERAGE     END OF    EXPENSES    INCOME TO    EXPENSES TO          (LOSS) TO
                   TOTAL     TURNOVER  COMMISSION   PERIOD   TO AVERAGE  AVERAGE NET   AVERAGE NET           AVERAGE
                 RETURN(A)     RATE       RATE    (IN 000'S) NET ASSETS     ASSETS        ASSETS           NET ASSETS
                 ----------- --------- ---------- ---------- ----------- ------------- ------------------- --------------------
- -------------------------------------------------------------------------------------------------------------------------------
<S>              <C>         <C>       <C>        <C>        <C>         <C>           <C>                 <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......   23.79%(d)   74.97%    $.0282    $53,786      0.91%(c)     0.12%(c)            2.40%(c)           (1.37)%(c)
1998--Class B
Shares(b).......   23.26(d)    74.97      .0282     13,857      1.67(c)     (0.72)(c)            2.91(c)            (1.96)(c)
1998--Class C
Shares(b).......    4.56(d)    74.97      .0282      4,132      1.68(c)     (0.76)(c)            2.92(c)            (2.00(c)
1998--Institu-
tional
Shares(b).......   23.89(d)    74.97      .0282      4,656      0.72(c)      0.42 (c)            1.96(c)            (0.82)(c)
1998--Service
Shares (b)......   23.56(d)    74.97      .0282        115      1.17(c)     (0.21)(c)            2.41(c)            (1.45)(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the
    investment at the NAV at the end of the period and no sales or redemption
    charges. Total return would be reduced if a sales or redemption charge
    were taken into account.
(b) Class A, Class B Institutional and Service Share activity commenced on May
    1, 1997. Class C share activity commenced on August 15, 1997.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
 
                                       15
<PAGE>
 
<TABLE>
<CAPTION>
                                  INCOME FROM           DISTRIBUTIONS TO
                           INVESTMENT OPERATIONS(E)       SHAREHOLDERS
                           ------------------------- -----------------------
                                           NET
                                       REALIZED AND               FROM NET
                                        UNREALIZED                REALIZED
                 NET ASSET    NET     GAIN (LOSS) ON    FROM      GAIN ON        NET     NET ASSET
                  VALUE,   INVESTMENT INVESTMENT AND    NET      INVESTMENT   INCREASE    VALUE,               PORTFOLIO
                 BEGINNING   INCOME      FUTURES     INVESTMENT AND FUTURES    IN NET     END OF     TOTAL     TURNOVER
                 OF PERIOD   (LOSS)    TRANSACTIONS    INCOME   TRANSACTIONS ASSET VALUE  PERIOD   RETURN(A)     RATE
                 --------- ---------- -------------- ---------- ------------ ----------- --------- ---------   ---------
                                                                      CORE SMALL CAP EQUITY FUND
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>        <C>          <C>         <C>       <C>         <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......  $10.00     $(0.01)      $0.65          --        $(0.05)      $0.59     $10.59     6.37%(d)    37.65%
1998--Class B
Shares(b).......   10.00      (0.03)       0.64          --         (0.05)       0.56      10.56     6.07(d)     37.65
1998--Class C
Shares(b).......   10.00      (0.02)       0.64          --         (0.05)       0.57      10.57     6.17(d)     37.65
1998--Institu-
tional
Shares(b).......   10.00       0.01        0.65          --         (0.05)       0.61      10.61     6.57(d)     37.65
1998--Service
Shares(b).......   10.00       0.01        0.64          --         (0.05)       0.60      10.60     6.47(d)     37.65
<CAPTION>
                                                                    RATIOS ASSUMING NO
                                                                 VOLUNTARY WAIVER OF FEES
                                                                  OR EXPENSE LIMITATIONS
                                                                 ---------------------------
                                                                                  RATIO
                               NET      RATIO     RATIO OF NET                   OF NET
                            ASSETS AT   OF NET     INVESTMENT     RATIO OF     INVESTMENT
                  AVERAGE    END OF    EXPENSES   INCOME (LOSS)  EXPENSES TO  INCOME (LOSS)
                 COMMISSION  PERIOD   TO AVERAGE   TO AVERAGE    AVERAGE NET   TO AVERAGE
                    RATE    (IN 000S) NET ASSETS   NET ASSETS      ASSETS      NET ASSETS
                 ---------- --------- ----------- -------------- ------------ --------------
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>        <C>       <C>         <C>            <C>          <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......   $.0370    $11,118     1.25%(c)     (0.36)%(c)    3.92%(c)      (3.03)%(c)
1998--Class B
Shares(b).......    .0370      9,957     1.95(c)      (1.04)(c)     4.37(c)       (3.46)(c)
1998--Class C
Shares(b).......    .0370      2,557     1.95(c)      (1.07)(c)     4.37(c)       (3.49)(c)
1998--Institu-
tional
Shares(b).......    .0370      9,026     0.95(c)       0.15 (c)     3.37(c)       (2.27)(c)
1998--Service
Shares(b).......    .0370          2     1.45(c)       0.40 (c)     3.87(c)       (2.02)(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the investment
    at the NAV at the end of the period and no sales or redemption charges.
    Total return would be reduced if a sales or redemption charge were taken
    into account.
(b) Commenced operations on August 15, 1997.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
 
                                       16
<PAGE>
 
<TABLE>
<CAPTION>
                                  INCOME FROM                       DISTRIBUTIONS TO
                           INVESTMENT OPERATIONS(E)                   SHAREHOLDERS
                           ------------------------- -----------------------------------------------
                                           NET                               FROM NET   IN EXCESS OF     NET
                 NET ASSET    NET      REALIZED AND     FROM    IN EXCESS    REALIZED   NET REALIZED  INCREASE   NET ASSET
                  VALUE,   INVESTMENT   UNREALIZED      NET       OF NET     GAIN ON      GAIN ON    (DECREASE)   VALUE,
                 BEGINNING   INCOME   GAIN (LOSS) ON INVESTMENT INVESTMENT  INVESTMENT   INVESTMENT    IN NET     END OF
                 OF PERIOD   (LOSS)    INVESTMENTS     INCOME     INCOME   TRANSACTIONS TRANSACTIONS ASSET VALUE  PERIOD
                 --------- ---------- -------------- ---------- ---------- ------------ ------------ ----------- ---------
                                                                                                    CAPITAL GROWTH FUND
- --------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>        <C>        <C>          <C>          <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $16.73     $ 0.02       $ 4.78       $(0.01)    $(0.01)     $(3.03)      $  --       $ 1.75     $18.48
1998--Class B
Shares..........   16.67       0.02         4.61          --         --        (1.20)       (1.83)       1.60      18.27
1998--Class C
Shares(b).......   19.73      (0.02)        1.60          --       (0.04)      (0.47)       (2.56)      (1.49)     18.24
1998--Institu-
tional
Shares(b).......   19.88       0.02         1.66        (0.01)     (0.07)      (0.41)       (2.62)      (1.43)     18.45
1998--Service
Shares--(b).....   19.88      (0.01)        1.66          --       (0.04)      (0.76)       (2.27)      (1.42)     18.46
- --------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   14.91       0.10         3.56        (0.10)     (0.02)      (1.72)         --         1.82      16.73
1997--Class B
Shares(b).......   15.67       0.01         2.81        (0.01)     (0.09)      (1.72)         --         1.00      16.67
- --------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   13.67       0.12         3.93        (0.12)       --        (2.69)         --         1.24      14.91
- --------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   15.96       0.03        (0.69)       (0.01)       --        (1.62)         --        (2.29)     13.67
- --------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   14.64       0.02         2.40        (0.01)     (0.02)      (1.07)         --         1.32      15.96
- --------------------------------------------------------------------------------------------------------------------------
1993--Class A
Shares..........   13.65       0.06         2.28        (0.07)       --        (1.28)         --         0.99      14.64
- --------------------------------------------------------------------------------------------------------------------------
1992--Class A
Shares..........   11.10       0.28         2.90        (0.31)       --        (0.32)         --         2.55      13.65
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1991--Class A
Shares(c).......   11.34       0.34        (0.27)       (0.31)       --          --           --        (0.24)     11.10
<CAPTION>
                                                                                        RATIOS ASSUMING NO
                                                                                     VOLUNTARY WAIVER OF FEES
                                                                                      OR EXPENSE LIMITATIONS
                                                                                     -------------------------
                                                                                                     RATIO
                                                    NET       RATIO    RATIO OF NET                 OF NET
                                                 ASSETS AT    OF NET    INVESTMENT    RATIO OF    INVESTMENT
                            PORTFOLIO  AVERAGE     END OF    EXPENSES   INCOME TO    EXPENSES TO INCOME (LOSS)
                   TOTAL    TURNOVER  COMMISSION   PERIOD   TO AVERAGE AVERAGE NET   AVERAGE NET  TO AVERAGE
                 RETURN(A)    RATE     RATE(B)   (IN 000S)  NET ASSETS    ASSETS       ASSETS     NET ASSETS
                 ---------- --------- ---------- ---------- ---------- ------------- ----------- -------------
- --------------------------------------------------------------------------------------------------------------------------
<S>              <C>        <C>       <C>        <C>        <C>        <C>           <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........   29.71%     61.50%    $.0612   $1,256,595    1.40%       0.08%        1.65%        (0.17)%
1998--Class B
Shares..........   28.73      61.50      .0612       40,827    2.18       (0.77)        2.18         (0.77)
1998--Class C
Shares(b).......    8.83(d)   61.50      .0612        5,395    2.21(c)    (0.86)(c)     2.21(c)      (0.86)(c)
1998--Institu-
tional
Shares(b).......    9.31(d)   61.50      .0612        7,262    1.16(c)     0.18 (c)     1.16(c)       0.18 (c)
1998--Service
Shares--(b).....    9.18(d)   61.50      .0612            2    1.50(c)    (0.16)(c)     1.50(c)      (0.16)(c)
- --------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   25.97      52.92      .0563      920,646    1.40        0.62         1.65          0.37
1997--Class B
Shares(b).......   19.39(d)   52.92      .0563        3,221    2.15(c)    (0.39)(c)     2.15(c)      (0.39)(c)
- --------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   30.45      63.90        --       881,056    1.36        0.65         1.61          0.40
- --------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   (4.38)     38.36        --       862,105    1.38        0.16         1.63         (0.09)
- --------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   16.89      36.12        --       833,682    1.38        0.13         1.63         (0.12)
- --------------------------------------------------------------------------------------------------------------------------
1993--Class A
Shares..........   18.01      58.93        --       665,976    1.41        0.42         1.66          0.17
- --------------------------------------------------------------------------------------------------------------------------
1992--Class A
Shares..........   29.31      48.93        --       500,307    1.53        2.09         1.78          1.84
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1991--Class A
Shares(c).......    0.84(d)   35.63        --       437,533    1.27(c)     3.24(c)      1.47(c)       3.04(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the
    investment at the NAV at the end of the period and no sales or redemption
    charges. Total return would be reduced if a sales or redemption charge
    were taken into account.
(b) Class A, Class B, Class C, Institutional and Service Share activity
    commenced on April 20, 1990, May 1, 1996, August 15, 1997, August 15, 1997
    and August 15, 1997, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
                                       17
<PAGE>
 
<TABLE>
<CAPTION>
                                         INCOME FROM                              DISTRIBUTIONS TO
                                   INVESTMENT OPERATIONS(E)                         SHAREHOLDERS
                           ---------------------------------------- ---------------------------------------------
                                                      NET REALIZED
                                                     AND UNREALIZED                                       NET
                                       NET REALIZED     LOSS ON                             FROM NET    INCREASE   NET
                 NET ASSET            AND UNREALIZED    FOREIGN                IN EXCESS    REALIZED   (DECREASE) ASSET
                  VALUE,      NET        GAIN ON        CURRENCY     FROM NET    OF NET     GAIN ON      IN NET   VALUE,
                 BEGINNING INVESTMENT  INVESTMENTS      RELATED     INVESTMENT INVESTMENT  INVESTMENT    ASSET    END OF
                 OF PERIOD   INCOME    AND OPTIONS    TRANSACTIONS    INCOME     INCOME   TRANSACTIONS   VALUE    PERIOD
                 --------- ---------- -------------- -------------- ---------- ---------- ------------ ---------- ------
                                                                                                    MID CAP EQUITY FUND
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>            <C>        <C>        <C>          <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares(b).......  $23.63     $0.09        $0.77          $(0.01)      $(0.06)    $(0.04)     $(2.77)     $(2.02)  $21.61
1998--Class B
Shares(b).......   23.63      0.06         0.75           (0.01)       (0.09)       --        (2.77)      (2.06)   21.57
1998--Class C
Shares(b).......   23.63      0.06         0.77           (0.01)       (0.09)       --        (2.77)      (2.04)   21.59
1998--Institu-
tional Shares...   18.73      0.16         5.70           (0.04)       (0.13)       --        (2.77)       2.92    21.65
1998--Service
Shares(b).......   23.01      0.09         1.41           (0.01)       (0.11)       --        (2.77)      (1.39)   21.62
- ------------------------------------------------------------------------------------------------------------------------
1997--Institu-
tional Shares...   15.91      0.24         3.77             --         (0.24)     (0.93)      (0.02)       2.82    18.73
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1996--Institu-
tional
Shares(b).......   15.00      0.13         0.90             --         (0.12)       --          --         0.91    15.91
<CAPTION>
                                                                                     RATIOS ASSUMING NO
                                                                                    EXPENSE LIMITATIONS
                                                                                   ------------------------
                                                     NET   RATIO OF    RATIO OF
                                                   ASSETS    NET         NET       RATIO OF     RATIO OF
                                                   AT END  EXPENSES   INVESTMENT   EXPENSES        NET
                                                     OF       TO        INCOME        TO       INVESTMENT
                             PORTFOLIO   AVERAGE   PERIOD  AVERAGE    (LOSS) TO    AVERAGE    INCOME (LOSS)
                   TOTAL     TURNOVER   COMMISSION   (IN     NET       AVERAGE       NET       TO AVERAGE
                 RETURN(A)     RATE      RATE(F)    000S)   ASSETS    NET ASSETS    ASSETS     NET ASSETS
                 ----------- ---------- ---------- ------- ---------- ------------ ---------- -------------
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>         <C>        <C>        <C>     <C>        <C>          <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares(b).......    3.42%(d)   62.60%    $0.0540   $90,588   1.35%(c)    0.33%(c)    1.47%(c)      0.21%(c)
1998--Class B
Shares(b).......    3.17(d)    62.60      0.0540    28,743   1.85(c)    (0.20)(c)    1.97(c)      (0.32)(c)
1998--Class C
Shares(b).......    3.27(d)    62.60      0.0540     6,445   1.85(c)    (0.23)(c)    1.97(c)      (0.35)(c)
1998--Institu-
tional Shares...   30.86       62.60      0.0540   236,440   0.85        0.78        0.97          0.66
1998--Service
Shares(b).......    6.30(d)    62.60      0.0540         8   1.35(c)     0.63 (c)    1.43(c)       0.51 (c)
- ------------------------------------------------------------------------------------------------------------------------
1997--Institu-
tional Shares...   25.63       74.03      0.0547   145,253   0.85        1.35        0.91          1.29
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1996--Institu-
tional
Shares(b).......    6.89(d)    58.77(d)      --    135,671   0.85(c)     1.67(c)     0.98(c)       1.54(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the investment
    at the NAV at the end of the period and no sales or redemption charges.
    Total return would be reduced if a sales or redemption charge were taken
    into account.
(b) Class A, Class B, Class C, Institutional and Service Share activity
    commenced on August 15, 1997, August 15, 1997, August 15, 1997, August 1,
    1995 and July 18, 1997, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
                                       18
<PAGE>
 
<TABLE>
<CAPTION>
                                     INCOME FROM                    DISTRIBUTIONS TO
                              INVESTMENT OPERATIONS(E)                SHAREHOLDERS
                           ------------------------------- -----------------------------------
                                          NET REALIZED                  FROM NET
                 NET ASSET    NET        AND UNREALIZED       FROM    REALIZED GAIN IN EXCESS  NET INCREASE
                  VALUE,   INVESTMENT    GAIN (LOSS) ON       NET     ON INVESTMENT   OF NET    (DECREASE)  NET ASSET
                 BEGINNING   INCOME      INVESTMENT AND    INVESTMENT AND OPTIONS   INVESTMENT IN NET ASSET VALUE, END   TOTAL
                 OF PERIOD   (LOSS)   OPTIONS TRANSACTIONS   INCOME   TRANSACTIONS    INCOME      VALUE     OF PERIOD  RETURN(A)
                 --------- ---------- -------------------- ---------- ------------- ---------- ------------ ---------- ---------
                                                                                                          SMALL CAP VALUE FUND
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>                  <C>        <C>           <C>        <C>          <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $20.91     $0.14           $5.33           $  --       $(2.33)      $  --       $ 3.14      $24.05     26.17%
1998--Class B
Shares..........   20.80     (0.01)           5.27              --        (2.33)         --         2.93       23.73     25.29
1998--Class C
Shares(b).......   24.69     (0.06)           1.43              --        (1.99)       (0.34)      (0.96)      23.73      5.51(d)
1998--Institu-
tional
Shares(b).......   24.91      0.03            1.48              --        (2.05)       (0.28)      (0.82)      24.09      6.08(d)
1998--Service
Shares(b).......   24.91     (0.01)           1.48              --        (2.02)       (0.31)      (0.86)      24.05      5.91(d)
- ---------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   17.29     (0.21)           4.92              --        (1.09)         --         3.62       20.91     27.28
1997--Class B
Shares(b).......   20.79     (0.11)           1.21              --        (1.09)         --         0.01       20.80      5.39(d)
- ---------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   16.14     (0.23)           1.39              --        (0.01)         --         1.15       17.29      7.20
- ---------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   20.67     (0.07)          (3.53)             --        (0.69)       (0.24)      (4.53)      16.14    (17.53)
- ---------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   16.68     (0.04)           5.03              --        (1.00)         --         3.99       20.67     30.13
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1993--Class A
Shares(b).......   14.18      0.03            2.50            (0.03)        --           --         2.50       16.68     17.86(d)
<CAPTION>
                                                                                   RATIOS ASSUMING NO
                                                                                    VOLUNTARY WAIVER
                                                                                        OF FEES
                                                                               --------------------------
                                                                  RATIO OF                    RATIO OF
                                      NET ASSETS   RATIO OF    NET INVESTMENT   RATIO OF   NET INVESTMENT
                 PORTFOLIO  AVERAGE   AT END OF  NET EXPENSES INCOME (LOSS) TO EXPENSES TO INCOME (LOSS)
                 TURNOVER  COMMISSION   PERIOD    TO AVERAGE    AVERAGE NET      AVERAGE   TO AVERAGE NET
                   RATE     RATE(F)   (IN 000S)   NET ASSETS       ASSETS      NET ASSETS      ASSETS
                 --------- ---------- ---------- ------------ ---------------- ----------- --------------
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>        <C>          <C>              <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........   84.81%   $0.0517    $370,246      1.54%         (0.28)%        1.76%        (0.50)%
1998--Class B
Shares..........   84.81     0.0517      42,677      2.29          (0.92)         2.29         (0.92)
1998--Class C
Shares(b).......   84.81     0.0517       5,604      2.09(c)       (0.79)(c)      2.09(c)      (0.79)(c)
1998--Institu-
tional
Shares(b).......   84.81     0.0517      14,626      1.16(c)        0.27(c)       1.16(c)       0.27(c)
1998--Service
Shares(b).......   84.81     0.0517           2      1.45(c)       (0.07)(c)      1.45(c)      (0.07)(c)
- ---------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   99.46      .0461     212,061      1.60          (0.72)         1.85         (0.97)
1997--Class B
Shares(b).......   99.46      .0461       3,674      2.35(c)       (1.63)(c)      2.35(c)      (1.63)(c)
- ---------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   57.58        --      204,994      1.41          (0.59)         1.66         (0.84)
- ---------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   43.67        --      319,487      1.53          (0.53)         1.78         (0.78)
- ---------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   56.81        --      261,074      1.60          (0.45)         1.85         (0.70)
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1993--Class A
Shares(b).......    7.12        --       59,339      1.65(c)        0.62(c)       2.70(c)      (0.43)(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the investment
    at the NAV at the end of the period and no sales or redemption charges.
    Total return would be reduced if a sales or redemption charge were taken
    into account.
(b) Class A, Class B, Class C, Institutional and Service Share activity
    commenced on October 22, 1992, May 1, 1996, August 15, 1997, August 15,
    1997 and August 15, 1997, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
                                       19
<PAGE>
 
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
  The investment objectives and principal investment policies of each Fund are
described below. Other investment practices and management techniques, which
involve certain risks, are described under "Description of Securities," "Risk
Factors" and "Investment Techniques." There can be no assurance that a Fund's
investment objectives will be achieved.
 
  The Investment Adviser may purchase for the Funds common stocks, preferred
stocks, interests in real estate investment trusts, convertible debt
obligations, convertible preferred stocks, equity interests in trusts,
partnerships, joint ventures, limited liability companies and similar
enterprises, warrants and stock purchase rights ("equity securities"). In
choosing a Fund's securities, the Investment Adviser utilizes first-hand
fundamental research, including visiting company facilities to assess
operations and to meet decision-makers. The Investment Adviser may also use
macro analysis of numerous economic and valuation variables to anticipate
changes in company earnings and the overall investment climate. The Investment
Adviser is able to draw on the research and market expertise of the Goldman
Sachs Global Investment Research Department and other affiliates of the
Investment Adviser, as well as information provided by other securities
dealers. Equity securities in a Fund's portfolio will generally be sold when
the Investment Adviser believes that the market price fully reflects or
exceeds the securities' fundamental valuation or when other more attractive
investments are identified.
 
  Value Style Funds. The Growth and Income, Mid Cap Equity, Small Cap Value
Funds and the equity portion of the Balanced Fund are managed using a value
oriented approach. The Investment Adviser evaluates securities using
fundamental analysis and intends to purchase equity securities that are, in
its view, underpriced relative to a combination of such companies' long-term
earnings prospects, growth rate, free cash flow and/or dividend-paying
ability. Consideration will be given to the business quality of the issuer.
Factors positively affecting the Investment Adviser's view of that quality
include the competitiveness and degree of regulation in the markets in which
the company operates, the existence of a management team with a record of
success, the position of the company in the markets in which it operates, the
level of the company's financial leverage and the sustainable return on
capital invested in the business. The Funds may also purchase securities of
companies that have experienced difficulties and that, in the opinion of the
Investment Adviser, are available at attractive prices.
 
  Growth Style Funds. The Capital Growth Fund is managed using a growth equity
oriented approach. Equity securities for this Fund are selected based on their
prospects for above average growth. The Investment Adviser will select
securities of growth companies trading, in the Investment Adviser's opinion,
at a reasonable price relative to other industries, competitors and historical
price/earnings multiples. The Fund generally will invest in companies whose
earnings are believed to be in a relatively strong growth trend, or, to a
lesser extent, in companies in which significant further growth is not
anticipated but whose market value per share is thought to be undervalued. In
order to determine whether a security has favorable growth prospects, the
Investment Adviser ordinarily looks for one or more of the following
characteristics in relation to the security's prevailing price: prospects for
above average sales and earnings growth per share; high return on invested
capital; free cash flow generation; sound balance sheet, financial and
accounting policies, and overall financial strength; strong competitive
advantages; effective research, product development, and marketing; pricing
flexibility; strength of management; and general operating characteristics
that will enable the company to compete successfully in its marketplace.
 
                                      20
<PAGE>
 
  Quantitative Style Funds. The CORE U.S. Equity, CORE Large Cap Growth and
CORE Small Cap Equity Funds (the "CORE Funds") are managed using both
quantitative and fundamental techniques. CORE is an acronym for "Computer-
Optimized, Research-Enhanced," which reflects the CORE Funds' investment
process. This investment process and the proprietary multifactor model used to
implement it are discussed below.
 
  Investment Process. The Investment Adviser begins with a broad universe of
U.S. equity securities for the CORE Funds. As described more fully below, the
Investment Adviser uses a proprietary multifactor model (the "Multifactor
Model") to forecast the returns of different markets and individual
securities. In the case of an equity security followed by the Goldman Sachs
Global Investment Research Department (the "Research Department"), a rating is
assigned based upon the Research Department's evaluation. In the discretion of
the Investment Adviser, ratings may also be assigned to equity securities
based on research ratings obtained from other industry sources.
 
  In building a diversified portfolio for each CORE Fund, the Investment
Adviser utilizes optimization techniques to seek to maximize the Fund's
expected return, while maintaining a risk profile similar to the Fund's
benchmark. Each portfolio is primarily comprised of securities rated highest
by the foregoing investment process and has risk characteristics and industry
weightings similar to the relevant Fund's benchmark.
 
  Multifactor Model. The Multifactor Model is a rigorous computerized rating
system for forecasting the returns of different equity markets and individual
equity securities according to fundamental investment characteristics. The
CORE Funds use the Multifactor Model to forecast the returns of securities
held in each Fund's portfolio. The Multifactor Model incorporates common
variables covering measures of value, growth, momentum and risk (e.g.,
book/price ratio, earnings/price ratio, price momentum, price volatility,
consensus growth forecasts, earnings estimate revisions and earnings
stability). All of the factors used in the Multifactor Model have been shown
to significantly impact the performance of the securities and markets they
were designed to forecast.
 
  The weightings assigned to the factors in the Multifactor Model used by the
CORE Funds are derived using a statistical formulation that considers each
factor's historical performance in different market environments. As such, the
Multifactor Model is designed to evaluate each security using only the factors
that are statistically related to returns in the anticipated market
environment. Because it includes many disparate factors, the Investment
Adviser believes that the Multifactor Model is broader in scope and provides a
more thorough evaluation than most conventional quantitative models.
Securities and markets ranked highest by the Multifactor Model do not have one
dominant investment characteristic; rather, they possess an attractive
combination of investment characteristics.
 
  Research Department. In assigning ratings to equity securities, the Research
Department uses a four category rating system ranging from "recommended for
purchase" to "likely to underperform." The ratings reflect the analyst's
judgment as to the investment results of a specific security and incorporate
economic outlook, valuation, risk and a variety of other factors.
 
  By employing both a quantitative (i.e., the Multifactor Model) and a
qualitative (i.e., research enhanced) method of selecting securities, the CORE
Funds seek to capitalize on the strengths of each discipline.
 
                                      21
<PAGE>
 
 BALANCED FUND
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital growth and current income. The Fund seeks capital
appreciation primarily through the equity component of its portfolio while
investing in fixed income securities primarily to provide income for regular
quarterly dividends.
 
  Primary Investment Focus. The Fund invests, under normal circumstances,
between 45% and 65% of its total assets in equity securities. The Fund also
invests at least 25% of its total assets in fixed-income senior securities and
the remainder of its assets in other fixed income securities and cash. The
percentage of the portfolio invested in equity and fixed-income securities
will vary from time to time as the Investment Adviser evaluates their relative
attractiveness based on market valuations, economic growth and inflation
prospects. This allocation is subject to the Fund's intention to pay regular
quarterly dividends. The amount of quarterly dividends can also be expected to
fluctuate in accordance with factors such as prevailing interest rates and the
percentage of the Fund's assets invested in fixed-income securities.
 
  Other. Although the Fund's equity investments consist primarily of publicly
traded U.S. securities, the Fund may invest up to 10% of its total assets in
the equity securities of foreign issuers, including issuers in Emerging
Countries and equity securities quoted in foreign currencies. A portion of the
Fund's portfolio of equity securities may be selected primarily to provide
current income. Equity securities selected to provide current income may
include interests in real estate investment trusts, convertible securities,
preferred stocks, utility stocks and interests in limited partnerships.
 
  The Fund's fixed-income securities primarily include securities issued by
the U.S. Government, its agencies, instrumentalities or sponsored enterprises,
corporations or other entities, mortgage-backed and asset-backed securities,
municipal securities and custodial receipts. The Fund may also invest in debt
obligations (U.S. dollar and non-U.S. dollar denominated) issued or guaranteed
by one or more foreign governments or any of their political subdivisions,
agencies or instrumentalities and foreign corporations or other entities. Such
securities are collectively referred to herein as "fixed-income securities."
The Fund's investments in fixed-income securities that are issued by foreign
issuers, including issuers in Emerging Countries, may not exceed 10% of the
Fund's total assets. The Fund may employ certain currency techniques to seek
to hedge against currency exchange rate fluctuations or to seek to increase
total return. When used to seek to enhance return, these management techniques
are considered speculative. Such currency management techniques involve risks
different from those associated with investing solely in securities of U.S.
issuers quoted in U.S. dollars. See "Description of Securities," "Investment
Techniques" and "Risk Factors."
 
 GROWTH AND INCOME FUND
 
 
  Objectives. The Fund's investment objectives are to provide investors with
long-term growth of capital and growth of income.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 65% of its total assets in equity securities that the Investment Adviser
considers to have favorable prospects for capital appreciation and/or
dividend-paying ability.
 
  Other. The Fund may invest up to 35% of its total assets in fixed-income
securities that, in the opinion of the Investment Adviser, offer the potential
to further the Fund's investment objectives. In addition, although the Fund
will invest primarily in publicly traded U.S. securities, it may invest up to
25% of its total assets in foreign securities, including securities of issuers
in Emerging Countries and securities quoted in foreign currencies.
 
 
                                      22
<PAGE>
 
 CORE U.S. EQUITY FUND (FORMERLY, THE "SELECT EQUITY FUND")
 
 
  Objective: The Fund's investment objective is to provide investors with
long-term growth of capital and dividend income. The Fund seeks to achieve its
objective through a broadly diversified portfolio of large cap and blue chip
equity securities representing all major sectors of the U.S. economy.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities of U.S. issuers, including
certain foreign issuers that are traded in the United States. The Fund's
investments are selected using both a variety of quantitative techniques and
fundamental research in seeking to maximize the Fund's expected return, while
maintaining risk, style, capitalization and industry characteristics similar
to the S&P 500 Index. The Fund seeks a broad representation in most major
sectors of the U.S. economy and a portfolio comprised of companies with
average long-term earnings growth expectations and dividend yields. The Fund
may invest only in fixed-income securities that are considered cash
equivalents.
 
  For a description of the investment process of the Fund, see "Investment
Objectives And Policies--Quantitative Style Funds."
 
 CORE LARGE CAP GROWTH FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital. The Fund seeks to achieve its objective through a
broadly diversified portfolio of equity securities of large cap U.S. issuers
that are expected to have better prospects for earnings growth than the growth
rate of the general domestic economy. Dividend income is a secondary
consideration.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities of U.S. issuers, including
certain foreign issuers that are traded in the United States. The Investment
Adviser emphasizes a company's growth prospects in analyzing equity securities
to be purchased by the Fund. The Fund's investments are selected using both a
variety of quantitative techniques and fundamental research in seeking to
maximize the Fund's expected return, while maintaining risk, style,
capitalization and industry characteristics similar to the Russell 1000 Growth
Index. The Fund seeks a portfolio comprised of companies with above average
capitalizations and earnings growth expectations and below average dividend
yields. The Fund may invest only in fixed-income securities that are
considered cash equivalents.
 
  For a description of the investment process of the Fund, see "Investment
Objectives and Policies--Quantitative Style Funds."
 
 CORE SMALL CAP EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital. The Fund seeks to achieve its objective through a
broadly diversified portfolio of equity securities of U.S. issuers which are
included in the Russell 2000 Index at the time of investment.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities of U.S. issuers, including
certain foreign issuers that are traded in the United States. The Fund's
investments are selected using both a variety of quantitative techniques and
fundamental research in seeking to maximize the Fund's expected return, while
maintaining risk, style, capitalization and industry
 
                                      23
<PAGE>
 
characteristics similar to the Russell 2000 Index. The Fund seeks a portfolio
comprised of companies with small market capitalizations, strong expected
earnings growth and momentum, and better valuation and risk characteristics
than the Russell 2000 Index. The Fund may invest only in fixed-income
securities that are considered cash equivalents.
 
  The Investment Adviser believes that the companies in which the Fund may
invest offer greater opportunity for growth of capital than larger, more
mature, better known companies. Investments in small market capitalization
issuers involve special risks. See "Description of Securities" and "Risk
Factors." If the issuer of a portfolio security held by the Fund is no longer
included in the Russell 2000 Index, the Fund may, but is not required to, sell
the security.
 
  For a description of the investment process of the Fund, see "Investment
Objectives and Policies--Quantitative Style Funds."
 
 CAPITAL GROWTH FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities. The Fund seeks to achieve
its investment objective by investing in a diversified portfolio of equity
securities that are considered by the Investment Adviser to have long-term
capital appreciation potential.
 
  Other. Although the Fund will invest primarily in publicly traded U.S.
securities, it may invest up to 10% of its total assets in foreign securities,
including securities of issuers in Emerging Countries and securities quoted in
foreign currencies.
 
 MID CAP EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal circumstances,
substantially all of its assets in equity securities and at least 65% of its
total assets in equity securities of Mid-Cap Companies with public stock
market capitalizations (based upon shares available for trading on an
unrestricted basis) within the range of the market capitalization of companies
constituting the Russell Midcap Index at the time of investment (currently
between $400 million and $16 billion). If the capitalization of an issuer
increases above $16 billion after purchase of such issuer's securities, the
Fund may, but is not required to, sell the securities. Dividend income, if
any, is an incidental consideration.
 
  Other. The Fund may invest up to 35% of its total assets in fixed-income
securities. In addition, although the Fund will invest primarily in publicly
traded U.S. securities, it may invest up to 25% of its total assets in foreign
securities, including securities of issuers in Emerging Countries and
securities quoted in foreign currencies.
 
 SMALL CAP VALUE FUND (FORMERLY, THE "SMALL CAP EQUITY FUND")
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital growth.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 65% of its total assets in equity securities of companies with public
stock market capitalizations of $1 billion or less at the time of
 
                                      24
<PAGE>
 
investment. Under normal circumstances, the Fund's investment horizon for
ownership of stocks will be two to three years. Dividend income, if any, is an
incidental consideration. If the market capitalization of a company held by
the Fund increases above the amount stated above, the Fund may, consistent
with its investment objective, continue to hold the security.
 
  Small Capitalization Companies. The Fund invests in companies which the
Investment Adviser believes are well managed niche businesses that have the
potential to achieve high or improving returns on capital and/or above average
sustainable growth. The Fund may invest in securities of small market
capitalization companies which may have experienced financial difficulties.
Investments may also be made in companies that are in the early stages of
their life and that the Investment Adviser believes have significant growth
potential. The Investment Adviser believes that the companies in which the
Fund may invest offer greater opportunity for growth of capital than larger,
more mature, better known companies. However, investments in such small market
capitalization companies involve special risks. See "Description of
Securities" and "Risk Factors."
 
  Other. The Fund may invest in the aggregate up to 35% of its total assets in
the equity securities of companies with public stock market capitalizations in
excess of $1 billion at the time of investment and in fixed- income
securities. In addition, although the Fund will invest primarily in publicly
traded U.S. securities, it may invest up to 25% of its total assets in foreign
securities, including securities of issuers in Emerging Countries and
securities quoted in foreign currencies.
 
 
                           DESCRIPTION OF SECURITIES
 
  The Funds may invest in equity and fixed income securities in accordance
with the investment policies stated above. Certain of these permitted
investments are described in more detail in this section.
 
CONVERTIBLE SECURITIES
 
  Each Fund may invest in convertible securities, including debt obligations
and preferred stock of the issuer convertible at a stated exchange rate into
common stock of the issuer. Convertible securities generally offer lower
interest or dividend yields than non-convertible securities of similar
quality. As with all fixed-income securities, the market value of convertible
securities tends to decline as interest rates increase and, conversely, to
increase as interest rates decline. However, when the market price of the
common stock underlying a convertible security exceeds the conversion price,
the convertible security tends to reflect the market price of the underlying
common stock. As the market price of the underlying common stock declines, the
convertible security tends to trade increasingly on a yield basis, and thus
may not decline in price to the same extent as the underlying common stock.
Convertible securities rank senior to common stocks in an issuer's capital
structure and consequently entail less risk than the issuer's common stock. In
evaluating a convertible security, the Investment Adviser will give primary
emphasis to the attractiveness of the underlying common stock. The convertible
debt securities in which the Balanced Fund invests will be rated, at the time
of investment, B or better by Standard & Poor's Ratings Group ("Standard &
Poor's") or Moody's Investors Service, Inc. ("Moody's"), or if unrated by such
rating organizations, determined to be of comparable quality by the Investment
Adviser. The convertible securities in which the CORE Funds invest are not
subject to any minimum rating criteria. The convertible debt securities in
which the other Funds may invest are subject to the same rating criteria as a
Fund's investments in non-convertible debt securities. Convertible debt
securities are equity investments for purposes of each Fund's investment
policies.
 
                                      25
<PAGE>
 
FOREIGN INVESTMENTS
 
  FOREIGN SECURITIES. Each Fund may invest in the securities of foreign
issuers (provided that the CORE U.S. Equity, CORE Large Cap Growth and CORE
Small Cap Equity Funds may only invest in equity securities of foreign issuers
that are traded in the U.S.). Investments in foreign securities may offer
potential benefits that are not available from investments exclusively in
equity securities of domestic issuers quoted in U.S. dollars. Foreign
countries may have economic policies or business cycles different from those
of the U.S. and markets for foreign securities do not necessarily move in a
manner parallel to U.S. markets.
 
  Investing in the securities of foreign issuers involves certain special
risks, including those set forth below, which are not typically associated
with investing in U.S. dollar denominated or quoted securities of U.S.
issuers. Such investments may be affected by changes in currency rates,
changes in foreign or U.S. laws or restrictions applicable to such investments
and in exchange control regulations (e.g., currency blockage). A decline in
the exchange rate of the currency (i.e., weakening of the currency against the
U.S. dollar) in which a portfolio security is quoted or denominated relative
to the U.S. dollar would reduce the value of the portfolio security. In
addition, if the currency in which a Fund receives dividends, interest or
other payments declines in value against the U.S. dollar before such income is
distributed as dividends to shareholders or converted to U.S. dollars, the
Fund may have to sell portfolio securities to obtain sufficient cash to pay
such dividends. The expected introduction of a single currency, the euro, on
January 1, 1999 for participating European nations in the Economic and
Monetary Union ("EU") presents unique uncertainties, including whether the
payment and operational systems of banks and other financial institutions will
be ready by the scheduled launch date; the creation of suitable clearing and
settlement payment systems for the new currency; the legal treatment of
certain outstanding financial contracts after January 1, 1999 that refer to
existing currencies rather than the euro; the establishment and maintenance of
exchange rates for currencies being converted into the euro and the euro; the
fluctuation of the euro relative to non-euro currencies during the transition
period from January 1, 1999 to December 31, 2000 and beyond; whether the
interest rate, tax and labor regimes of European countries participating in
the euro will converge over time; and whether the conversion of the currencies
of other EU countries such as the United Kingdom, Denmark and Greece into the
euro and the admission of other non-EU countries such as Poland, Latvia and
Lithuania as members of the EU may have an impact on the euro. These or other
factors, including political and economic risks, could cause market
disruptions before or after the introduction of the euro, and could adversely
affect the value of securities and foreign currencies held by the Funds.
Commissions on transactions in foreign securities may be higher than those for
similar transactions on domestic stock markets. In addition, clearance and
settlement procedures may be different in foreign countries and, in certain
markets, such procedures have been unable to keep pace with the volume of
securities transactions, thus making it difficult to conduct such
transactions.
 
  Foreign issuers are not generally subject to uniform accounting, auditing
and financial reporting standards comparable to those applicable to U.S.
issuers. There may be less publicly available information about a foreign
issuer than about a U.S. issuer. In addition, there is generally less
government regulation of foreign markets, companies and securities dealers
than in the United States. Foreign securities markets may have substantially
less volume than U.S. securities markets and securities of many foreign
issuers are less liquid and more volatile than securities of comparable
domestic issuers. Furthermore, with respect to certain foreign countries,
there is a possibility of nationalization, expropriation or confiscatory
taxation, imposition of withholding or other taxes on dividend or interest
payments (or, in some cases, capital gains), limitations on the removal of
funds or other assets of the Funds, political or social instability or
diplomatic developments which could affect investments in those countries.
 
  INVESTMENTS IN ADRS, EDRS AND GDRS. Each Fund may invest in foreign
securities which take the form of sponsored and unsponsored American
Depository Receipts ("ADRs") and Global Depository Receipts
 
                                      26
<PAGE>
 
("GDRs") and each Fund, other than the CORE Funds, may also invest in European
Depository Receipts ("EDRs") or other similar instruments representing
securities of foreign issuers (together, "Depository Receipts"). ADRs
represent the right to receive securities of foreign issuers deposited in a
domestic bank or a correspondent bank. Prices of ADRs are quoted in U.S.
dollars, and ADRs are traded in the United States on exchanges or over-the-
counter and are sponsored and issued by domestic banks. EDRs and GDRs are
receipts evidencing an arrangement with a non-U.S. bank. EDRs and GDRs are not
necessarily quoted in the same currency as the underlying security. To the
extent a Fund acquires Depository Receipts through banks which do not have a
contractual relationship with the foreign issuer of the security underlying
the Depository Receipts to issue and service such Depository Receipts
(unsponsored Depository Receipts), there may be an increased possibility that
the Fund would not become aware of and be able to respond to corporate
actions, such as stock splits or rights offerings involving the foreign
issuer, in a timely manner. In addition, the lack of information may result in
inefficiencies in the valuation of such instruments. Investment in Depository
Receipts does not eliminate all the risks inherent in investing in securities
of non-U.S. issuers. The market value of Depository Receipts is dependent upon
the market value of the underlying securities and fluctuations in the relative
value of the currencies in which the Depository Receipt and the underlying
securities are quoted. However, by investing in Depository Receipts, such as
ADRs, that are quoted in U.S. dollars, a Fund may avoid currency risks during
the settlement period for purchases and sales.
 
  FOREIGN CURRENCY TRANSACTIONS. Because investment in foreign issuers will
usually involve currencies of foreign countries, and because the Balanced Fund
may have currency exposure independent of its securities positions, the value
of the assets of a Fund as measured in U.S. dollars will be affected by
changes in foreign currency exchange rates. A Fund may, to the extent it
invests in foreign securities, purchase or sell foreign currencies on a spot
basis and may also purchase or sell forward foreign currency exchange
contracts for hedging purposes and to seek to protect against anticipated
changes in future foreign currency exchange rates. In addition, the Balanced
Fund may enter into such contracts to seek to increase total return when the
Investment Adviser anticipates that the foreign currency will appreciate or
depreciate in value, but securities denominated or quoted in that currency do
not present attractive investment opportunities and are not held in the Fund's
portfolio. When entered into to seek to enhance return, forward foreign
currency exchange contracts are considered speculative. The Balanced Fund may
also engage in cross-hedging by using forward contracts in a currency
different from that in which the hedged security is denominated or quoted if
the Investment Adviser determines that there is a pattern of correlation
between the two currencies. If a Fund enters into a forward foreign currency
exchange contract to buy foreign currency for any purpose or the Balanced Fund
enters into forward foreign currency exchange contracts to sell foreign
currency to seek to increase total return, the Fund will segregate cash or
liquid assets in an amount equal to the value of the Fund's total assets
committed to the consummation of the forward contract, or otherwise cover its
position in a manner permitted by the SEC. The Fund will incur costs in
connection with conversions between various currencies. A Fund may hold
foreign currency received in connection with investments in foreign securities
when, in the judgment of the Investment Adviser, it would be beneficial to
convert such currency into U.S. dollars at a later date, based on anticipated
changes in the relevant exchange rate.
 
  Currency exchange rates may fluctuate significantly over short periods of
time causing, along with other factors, a Fund's NAV to fluctuate. Currency
exchange rates generally are determined by the forces of supply and demand in
the foreign exchange markets and the relative merits of investments in
different countries, actual or anticipated changes in interest rates and other
complex factors, as seen from an international perspective. Currency exchange
rates also can be affected unpredictably by the intervention of U.S. or
foreign governments or central banks, or the failure to intervene, or by
currency controls or political developments in the U.S. or
 
                                      27
<PAGE>
 
abroad. To the extent that a substantial portion of a Fund's total assets,
adjusted to reflect the Fund's net position after giving effect to currency
transactions, is denominated or quoted in the currencies of foreign countries,
the Fund will be more susceptible to the risk of adverse economic and
political developments within those countries.
 
  The market in forward foreign currency exchange contracts, currency swaps
and other privately negotiated currency instruments offers less protection
against defaults by the other party to such instruments than is available for
currency instruments traded on an exchange. Such contracts are subject to the
risk that the counterparty to the contract will default on its obligations.
Since these contracts are not guaranteed by an exchange or clearinghouse, a
default on the contract would deprive the Fund of unrealized profits,
transaction costs or the benefits of a currency hedge or force the Fund to
cover its purchase or sale commitments, if any, at the current market price. A
Fund will not enter into forward foreign currency exchange contracts, currency
swaps or other privately negotiated currency instruments unless the credit
quality of the unsecured senior debt or the claims-paying ability of the
counterparty is considered to be investment grade by the Investment Adviser.
 
  The Balanced Fund may also engage in a variety of foreign currency
management techniques. For a discussion of such instruments and the risks
associated with their use, see "Investment Objective and Policies" in the
Additional Statement.
 
FIXED-INCOME SECURITIES
 
  U.S. GOVERNMENT SECURITIES. Each Fund may invest in U.S. Government
securities. Generally, these securities include U.S. Treasury obligations and
obligations issued or guaranteed by U.S. Government agencies,
instrumentalities or sponsored enterprises. U.S. Government securities also
include Treasury receipts and other stripped U.S. Government securities, where
the interest and principal components of stripped U.S. Government securities
are traded independently. A Fund may also invest in zero coupon U.S. Treasury
securities and in zero coupon securities issued by financial institutions,
which represent a proportionate interest in underlying U.S. Treasury
securities. A zero coupon security pays no interest to its holder during its
life and its value consists of the difference between its face value at
maturity and its cost. The market prices of zero coupon securities generally
are more volatile than the market prices of securities that pay interest
periodically. See "Taxation" in the Additional Statement.
 
  FOREIGN GOVERNMENT SECURITIES. The Balanced Fund may invest in debt
obligations of foreign governments and governmental agencies, including those
of Emerging Countries. Investment in sovereign debt obligations involves
special risks not present in debt obligations of corporate issuers. The issuer
of the debt or the governmental authorities that control the repayment of the
debt may be unable or unwilling to repay principal or interest when due in
accordance with the terms of such debt, and the Fund may have limited recourse
in the event of a default. Periods of economic uncertainty may result in the
volatility of market prices of sovereign debt, and in turn the Fund's NAV, to
a greater extent than the volatility inherent in debt obligations of U.S.
issuers. A sovereign debtor's willingness or ability to repay principal and
pay interest in a timely manner may be affected by, among other factors, its
cash flow situation, the extent of its foreign currency reserves, the
availability of sufficient foreign exchange on the date a payment is due, the
relative size of the debt service burden to the economy as a whole, the
sovereign debtor's policy toward international lenders and the political
constraints to which a sovereign debtor may be subject.
 
  MORTGAGE-BACKED AND ASSET-BACKED SECURITIES. Each Fund (other than the CORE
Funds) may invest in mortgage-backed securities ("Mortgage-Backed
Securities"), which represent direct or indirect participations in, or are
collateralized by and payable from, mortgage loans secured by real property.
Each Fund (other than the CORE Funds) may also invest in asset-backed
securities ("Asset-Backed Securities"). The principal and interest
 
                                      28
<PAGE>
 
payments on Asset-Backed Securities are collateralized by pools of assets such
as auto loans, credit card receivables, leases, installment contracts and
personal property. Such asset pools are securitized through the use of special
purpose trusts or corporations. Principal and interest payments may be credit
enhanced by a letter of credit, a pool insurance policy or a
senior/subordinated structure.
 
  The Balanced Fund may also invest in stripped Mortgage-Backed Securities
("SMBS") (including interest only and principal only securities), which are
derivative multiple class Mortgage-Backed Securities. SMBS are usually
structured with two different classes: one that receives 100% of the interest
payments and the other that receives 100% of the principal payments from a
pool of mortgage loans. If the underlying mortgage loans experience different
than anticipated prepayments of principal, the Fund may fail to recoup fully
its initial investment in these securities. The market value of the class
consisting entirely of principal payments generally is unusually volatile in
response to changes in interest rates. The yields on a class of SMBS that
receives all or most of the interest from mortgage loans are generally higher
than prevailing market yields on other Mortgage-Backed Securities because
their cash flow patterns are more volatile and there is a greater risk that
the initial investment will not be fully recouped. The Fund's investments in
SMBS may require the Fund to sell portfolio securities to generate sufficient
cash to satisfy certain income distribution requirements.
 
  CORPORATE DEBT OBLIGATIONS. Each Fund may invest in corporate debt
obligations. Corporate debt obligations are subject to the risk of an issuer's
inability to meet principal and interest payments on the obligations.
 
  BANK OBLIGATIONS. Each Fund may invest in obligations issued or guaranteed
by U.S. or foreign banks. Bank obligations, including without limitations,
time deposits, bankers' acceptances and certificates of deposit, may be
general obligations of the parent bank or may be limited to the issuing branch
by the terms of the specific obligations or by government regulation. Banks
are subject to extensive but different governmental regulations which may
limit both the amount and types of loans which may be made and interest rates
which may be charged. In addition, the profitability of the banking industry
is largely dependent upon the availability and cost of funds for the purpose
of financing lending operations under prevailing money market conditions.
General economic conditions as well as exposure to credit losses arising from
possible financial difficulties of borrowers play an important part in the
operation of this industry.
 
  STRUCTURED SECURITIES. Each Fund may invest in structured securities. The
value of the principal of and/or interest on such securities is determined by
reference to changes in the value of specific currencies, interest rates,
commodities, indices or other financial indicators (the "Reference") or the
relative change in two or more References. The interest rate or the principal
amount payable upon maturity or redemption may be increased or decreased
depending upon changes in the applicable Reference. The terms of the
structured securities may provide that in certain circumstances no principal
is due at maturity and, therefore, result in the loss of a Fund's investment.
Structured securities may be positively or negatively indexed, so that
appreciation of the Reference may produce an increase or decrease in the
interest rate or value of the security at maturity. In addition, changes in
the interest rates or the value of the security at maturity may be a multiple
of changes in the value of the Reference. Consequently, structured securities
may entail a greater degree of market risk than other types of fixed-income
securities. Structured securities may also be more volatile, less liquid and
more difficult to price accurately than less complex securities.
 
  RATING CRITERIA. Except as noted below, each Fund (other than the CORE
Funds, which only invest in debt instruments that are cash equivalents) may
invest in debt securities rated at least investment grade at the time of
investment. Investment grade debt securities are securities rated BBB or
higher by Standard & Poor's or Baa or higher by Moody's. A security will be
deemed to have met a rating requirement if it receives the
 
                                      29
<PAGE>
 
minimum required rating from at least one such rating organization even though
it has been rated below the minimum rating by one or more other rating
organizations, or if unrated by such rating organizations, determined by the
Investment Adviser to be of comparable credit quality. The Balanced Fund may
invest up to 10% of its total assets in debt securities that are rated BB or B
by Standard & Poor's or Ba or B by Moody's. The Growth and Income, Capital
Growth and Small Cap Value Funds may invest up to 10%, 10% and 35%,
respectively, of their total assets in debt securities which are unrated or
rated in the lowest rating categories by Standard & Poor's or Moody's (i.e.,
BB or lower by Standard & Poor's or Ba or lower by Moody's), including
securities rated D by Moody's or Standard & Poor's. Mid Cap Equity Fund may
invest up to 10% of its total assets in below investment grade debt securities
rated B or higher by Standard & Poor's or B or higher by Moody's. Fixed-
income securities rated BBB or Baa are considered medium-grade obligations
with speculative characteristics, and adverse economic conditions or changing
circumstances may weaken their issuers' capacity to pay interest and repay
principal. Fixed-income securities rated BB or Ba or below (or comparable
unrated securities) are commonly referred to as "junk bonds" and are
considered predominantly speculative and may be questionable as to principal
and interest payments. In some cases, such bonds may be highly speculative,
have poor prospects for reaching investment grade standing and be in default.
As a result, investment in such bonds will entail greater speculative risks
than those associated with investment in investment grade bonds. Also, to the
extent that the rating assigned to a security in a Fund's portfolio is
downgraded by a rating organization, the market price and liquidity of such
security may be adversely affected. See Appendix A to the Additional Statement
for a description of the corporate bond ratings assigned by Standard & Poor's
and Moody's.
 
REAL ESTATE INVESTMENT TRUSTS ("REITS")
 
  Each Fund may invest in REITs, which are pooled investment vehicles that
invest primarily in either real estate or real estate related loans. The value
of a REIT is affected by changes in the value of the properties owned by the
REIT or securing mortgage loans held by the REIT. REITs are dependent upon
cash flow from their investments to repay financing costs and the ability of
the REITs' manager. REITs are also subject to risks generally associated with
investments in real estate. A Fund will indirectly bear its proportionate
share of any expenses, including management fees, paid by a REIT in which it
invests.
 
 
                             INVESTMENT TECHNIQUES
 
OPTIONS ON SECURITIES AND SECURITIES INDICES
 
  Each Fund (other than the CORE U.S. Equity and CORE Large Cap Growth Funds)
may write (sell) covered call and put options and purchase call and put
options on any securities in which it may invest or on any securities index
composed of securities in which it may invest. The writing and purchase of
options is a highly specialized activity which involves investment techniques
and risks different from those associated with ordinary portfolio securities
transactions. The use of options to seek to increase total return involves the
risk of loss if the Investment Adviser is incorrect in its expectation of
fluctuations in securities prices or interest rates. The successful use of
options for hedging purposes also depends in part on the ability of the
Investment Adviser to manage future price fluctuations and the degree of
correlation between the options and securities markets. If the Investment
Adviser is incorrect in its expectation of changes in securities prices or
determination of the correlation between the securities indices on which
options are written and purchased and the securities in a Fund's investment
portfolio, the investment performance of the Fund will be less favorable than
it would have been in the absence of such options transactions. The writing of
options could significantly increase a Fund's portfolio turnover rate and,
therefore, associated brokerage commissions or spreads.
 
 
                                      30
<PAGE>
 
OPTIONS ON FOREIGN CURRENCIES
 
  A Fund may, to the extent it invests in foreign securities, purchase and
sell (write) call and put options on foreign currencies for the purpose of
protecting against declines in the U.S. dollar value of foreign portfolio
securities and anticipated dividends on such securities and against increases
in the U.S. dollar cost of foreign securities to be acquired. In addition, the
Balanced Fund may use options on currency to cross-hedge, which involves
writing or purchasing options on one currency to hedge against changes in
exchange rates for a different currency, if there is a pattern of correlation
between the two currencies. As with other kinds of options transactions,
however, the writing of an option on a foreign currency will constitute only a
partial hedge, up to the amount of the premium received. If an option that a
Fund has written is exercised, the Fund could be required to purchase or sell
foreign currencies at disadvantageous exchange rates, thereby incurring
losses. The purchase of an option on foreign currency may constitute an
effective hedge against exchange rate fluctuations; however, in the event of
exchange rate movements adverse to a Fund's position, the Fund may forfeit the
entire amount of the premium plus related transaction costs. In addition to
purchasing put and call options for hedging purposes, the Balanced Fund may
purchase call or put options on currency to seek to increase total return when
the Investment Adviser anticipates that the currency will appreciate or
depreciate in value, but the securities quoted or denominated in that currency
do not present attractive investment opportunities and are not held in the
Fund's portfolio. When purchased or sold to seek to increase total return,
options on currencies are considered speculative. Options on foreign
currencies written or purchased by the Funds are traded on U.S. and foreign
exchanges or over-the-counter.
 
FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS
 
  To seek to increase total return or to hedge against changes in interest
rates, securities prices or currency exchange rates, a Fund may purchase and
sell various kinds of futures contracts, and purchase and write call and put
options on any of such futures contracts. Each Fund may also enter into
closing purchase and sale transactions with respect to any such contracts and
options. The futures contracts may be based on various securities (such as
U.S. Government securities), foreign currencies, securities indices and other
financial instruments and indices. The CORE U.S. Equity and CORE Large Cap
Growth Funds may enter into such transactions only with respect to the S&P 500
Index in the case of the CORE U.S. Equity Fund and a representative index in
the case of the CORE Large Cap Growth Fund. A Fund will engage in futures and
related options transactions for bona fide hedging purposes as defined in
regulations of the Commodity Futures Trading Commission or to seek to increase
total return to the extent permitted by such regulations. A Fund may not
purchase or sell futures contracts or purchase or sell related options to seek
to increase total return, except for closing purchase or sale transactions, if
immediately thereafter the sum of the amount of initial margin deposits and
premiums paid on the Fund's outstanding positions in futures and related
options entered into for the purpose of seeking to increase total return would
exceed 5% of the market value of the Fund's net assets. These transactions
involve brokerage costs, require margin deposits and, in the case of contracts
and options obligating a Fund to purchase securities or currencies, require
the Fund to segregate and maintain cash or liquid assets with a value equal to
the amount of the Fund's obligations or to otherwise cover the obligations in
a manner permitted by the SEC.
 
  While transactions in futures contracts and options on futures may reduce
certain risks, such transactions themselves entail certain other risks. See
"Investment Objectives and Policies--Futures Contracts and Options on Futures
Contracts" in the Additional Statement. Thus, while a Fund may benefit from
the use of futures and options on futures, unanticipated changes in interest
rates, securities prices or currency exchange rates may result in poorer
overall performance than if the Fund had not entered into any futures
contracts or options transactions.
 
                                      31
<PAGE>
 
Because perfect correlation between a futures position and portfolio position
that is intended to be protected is impossible to achieve, the desired
protection may not be obtained and a Fund may be exposed to risk of loss. The
loss incurred by a Fund in entering into futures contracts and in writing call
options on futures is potentially unlimited and may exceed the amount of the
premium received. Futures markets are highly volatile and the use of futures
may increase the volatility of a Fund's NAV. The profitability of a Fund's
trading in futures to seek to increase total return depends upon the ability
of the Investment Adviser to analyze correctly the futures markets. In
addition, because of the low margin deposits normally required in futures
trading, a relatively small price movement in a futures contract may result in
substantial losses to a Fund. Further, futures contracts and options on
futures may be illiquid, and exchanges may limit fluctuations in futures
contract prices during a single day. The Funds may engage in futures
transactions on both U.S. and foreign exchanges. Foreign exchanges may not
provide the same protection as U.S. exchanges.
 
STANDARD AND POOR'S DEPOSITORY RECEIPTS
 
  Each Fund may, consistent with its objectives, purchase Standard & Poor's
Depository Receipts ("SPDRs"). SPDRs are American Stock Exchange-traded
securities that represent ownership in the SPDR Trust, a trust which has been
established to accumulate and hold a portfolio of common stocks that is
intended to track the price performance and dividend yield of the S&P 500.
This trust is sponsored by a subsidiary of the American Stock Exchange. SPDRs
may be used for several reasons, including but not limited to: facilitating
the handling of cash flows or trading, or reducing transaction costs. The use
of SPDRs would introduce additional risk to the Fund as the price movement of
the instrument does not perfectly correlate with the price action of the
underlying index.
 
EQUITY SWAPS
 
  Each Fund may invest up to 10% of its total assets in equity swaps. Equity
swaps allow the parties to a swap agreement to exchange the dividend income or
other components of return on an equity investment (e.g., a group of equity
securities or an index) for a component of return on another non-equity or
equity investment. An equity swap may be used by a Fund to invest in a market
without owning or taking physical custody of securities in circumstances in
which direct investment may be restricted for legal reasons or is otherwise
impractical. Equity swaps are derivatives and their value can be very
volatile. To the extent that the Investment Adviser does not accurately
analyze and predict the potential relative fluctuation of the components
swapped with another party, a Fund may suffer a loss. The value of some
components of an equity swap (such as the dividends on a common stock) may
also be sensitive to changes in interest rates. Furthermore, during the period
a swap is outstanding, a Fund may suffer a loss if the counterparty defaults.
In connection with its investments in equity swaps, a Fund will either
segregate cash or liquid assets or otherwise cover its obligations in a manner
required by the SEC.
 
WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS
 
  Each Fund may purchase when-issued securities. When-issued transactions
arise when securities are purchased by a Fund with payment and delivery taking
place in the future in order to secure what is considered to be an
advantageous price and yield to the Fund at the time of entering into the
transaction. Each Fund may also purchase or sell securities on a forward
commitment basis; that is, make contracts to purchase or sell securities for a
fixed price at a future date beyond the customary three-day settlement period.
The purchase of securities on a when-issued or forward commitment basis
involves a risk of loss if the value of the security to be purchased declines
prior to the settlement date. Conversely, securities sold on a forward
commitment basis involve the risk that the value of the securities to be sold
may increase prior to the settlement date. Although a
 
                                      32
<PAGE>
 
Fund would generally purchase securities on a when-issued or forward
commitment basis with the intention of acquiring securities for its portfolio,
a Fund may dispose of when-issued securities or forward commitments prior to
settlement if the Investment Adviser deems it appropriate to do so. A Fund
will segregate cash or liquid assets in an amount sufficient to meet the
purchase price until three days prior to the settlement date. Alternatively,
each Fund may enter into offsetting contracts for the forward sale of other
securities that it owns.
 
ILLIQUID AND RESTRICTED SECURITIES
 
  A Fund will not invest more than 15% of its net assets in illiquid
investments, which include securities (both foreign and domestic) that are not
readily marketable, certain SMBS, repurchase agreements maturing in more than
seven days, time deposits with a notice or demand period of more than seven
days, certain over-the-counter options, and certain restricted securities,
unless it is determined, based upon a review of the trading markets for a
specific restricted security, that such restricted security is eligible for
resale pursuant to Rule 144A under the Securities Act of 1933 and, therefore,
is liquid. The Trustees have adopted guidelines under which the Investment
Adviser determines and monitors the liquidity of portfolio securities, subject
to the oversight of the Trustees. Investing in restricted securities eligible
for resale pursuant to Rule 144A may decrease the liquidity of a Fund's
portfolio to the extent that qualified institutional buyers become for a time
uninterested in purchasing these restricted securities. The purchase price and
subsequent valuation of restricted and illiquid securities normally reflect a
discount, which may be significant, from the market price of comparable
securities for which a liquid market exists.
 
REPURCHASE AGREEMENTS
 
  Each Fund may enter into repurchase agreements with dealers in U.S.
Government securities and member banks of the Federal Reserve System which
furnish collateral at least equal in value or market price to the amount of
their repurchase obligation. The Balanced Fund may also enter into repurchase
agreements involving certain foreign government securities. If the other party
or "seller" defaults, a Fund might suffer a loss to the extent that the
proceeds from the sale of the underlying securities and other collateral held
by the Fund in connection with the related repurchase agreement are less than
the repurchase price. In addition, in the event of bankruptcy of the seller or
failure of the seller to repurchase the securities as agreed, a Fund could
suffer losses, including loss of interest on or principal of the security and
costs associated with delay and enforcement of the repurchase agreement. The
Trustees have reviewed and approved certain counterparties whom they believe
to be creditworthy and have authorized the Funds to enter into repurchase
agreements with such counterparties. In addition, each Fund, together with
other registered investment companies having management agreements with an
Investment Adviser or its affiliates, may transfer uninvested cash balances
into a single joint account, the daily aggregate balance of which will be
invested in one or more repurchase agreements.
 
LENDING OF PORTFOLIO SECURITIES
 
  Each Fund may seek to increase its income by lending portfolio securities.
Under present regulatory policies, such loans may be made to institutions,
such as certain broker-dealers, and are required to be secured continuously by
collateral in cash, cash equivalents, or U.S. Government securities maintained
on a current basis in an amount at least equal to the market value of the
securities loaned. Cash collateral may be invested in cash equivalents. If the
Investment Adviser determines to make securities loans, the value of the
securities loaned may not exceed 33 1/3% of the value of the total assets of a
Fund (including the loan collateral). A Fund may experience a loss or delay in
the recovery of its securities if the institution with which it has engaged in
a portfolio loan transaction breaches its agreement with the Fund.
 
                                      33
<PAGE>
 
MORTGAGE DOLLAR ROLLS
 
  The Balanced Fund may enter into mortgage "dollar rolls" in which the Fund
sells securities for delivery in the current month and simultaneously
contracts with the same counterparty to repurchase substantially similar (same
type, coupon and maturity) but not identical securities on a specified future
date. During the roll period, the Fund loses the right to receive principal
and interest paid on the securities sold. However, the Fund would benefit to
the extent of any difference between the price received for the securities
sold and the lower forward price for the future purchase or fee income plus
the interest earned on the cash proceeds of the securities sold until the
settlement date for the forward purchase. Unless such benefits exceed the
income, capital appreciation and gain or loss due to mortgage prepayments that
would have been realized on the securities sold as part of the mortgage dollar
roll, the use of this technique will diminish the investment performance of
the Fund. The Fund will segregate cash or liquid assets in an amount equal to
the forward purchase price until the settlement date. Successful use of
mortgage dollar rolls depends upon the Investment Adviser's ability to predict
correctly interest rates and mortgage prepayments. There is no assurance that
mortgage dollar rolls can be successfully employed. For financial reporting
and tax purposes, the Fund treats mortgage dollar rolls as two separate
transactions: one involving the purchase of a security and a separate
transaction involving a sale. The Fund does not currently intend to enter into
mortgage dollar rolls that are accounted for as a financing.
 
SHORT SALES AGAINST-THE-BOX
 
  Each Fund (other than the CORE Funds) may make short sales of securities or
maintain a short position, provided that at all times when a short position is
open the Fund owns an equal amount of such securities or securities
convertible into or exchangeable for, without payment of any further
consideration, an equal amount of the securities of the same issuer as the
securities sold short (a short sale against-the-box). Not more than 25% of a
Fund's net assets (determined at the time of the short sale) may be subject to
such short sales. As a result of recent tax legislation, short sales may not
generally be used to defer the recognition of gain for tax purposes with
respect to appreciated securities in a Fund's portfolio.
 
TEMPORARY INVESTMENTS
 
  Each Fund may, for temporary defensive purposes, invest 100% of its total
assets (except that the CORE Funds may only hold up to 35% of their respective
total assets) in U.S. Government securities, repurchase agreements
collateralized by U.S. Government securities, commercial paper rated at least
A-2 by Standard & Poor's or P-2 by Moody's, certificates of deposit, bankers'
acceptances, repurchase agreements, non-convertible preferred stocks and non-
convertible corporate bonds with a remaining maturity of less than one year.
When a Fund's assets are invested in such instruments, the Fund may not be
achieving its investment objective.
 
MISCELLANEOUS TECHNIQUES
 
  In addition to the techniques and investments described above, each Fund
may, with respect to no more than 5% of its net assets, engage in the
following techniques and investments: (i) warrants and stock purchase rights;
(ii) currency swaps (Balanced Fund only); (iii) credit swaps, mortgage swaps,
index swaps and interest rate swaps, caps, floors and collars (Balanced Fund
only); (iv) yield curve options and inverse floating rate securities (Balanced
Fund only); (v) other investment companies including World Equity Benchmark
Shares; (vi) unseasoned companies; (vii) municipal securities (Balanced Fund
only); (viii) loan participations (Balanced Fund only); (ix) custodial
receipts; and (x) reverse repurchase agreements for investment purposes
(Balanced Fund only).
 
  In addition, each Fund may borrow up to 33 1/3% of its total assets from
banks for temporary or emergency purposes. A Fund may not make additional
investments if borrowings (excluding covered mortgage dollar rolls) exceed 5%
of its total assets. For more information, see the Additional Statement.
 
                                      34
<PAGE>
 
 
                                 RISK FACTORS
 
  RISKS OF INVESTING IN EQUITY SECURITIES. In general, the Funds are subject
to the risks associated with investments in common stocks and other equity
securities. Stock values fluctuate in response to the activities of individual
companies and in response to general market and economic conditions and,
accordingly, the value of the stocks that a Fund holds may decline over short
or extended periods. The U.S. stock markets tend to be cyclical, with periods
when stock prices generally rise and periods when prices generally decline. As
of the date of this Prospectus, domestic stock markets were trading at or
close to record high levels and there can be no guarantee that such levels
will continue.
 
  RISKS OF INVESTING IN SMALL CAPITALIZATION COMPANIES. Investing in the
securities of such companies involves greater risk and the possibility of
greater portfolio price volatility. Historically, small market capitalization
stocks and stocks of recently organized companies have been more volatile in
price than the larger market capitalization stocks included in the S&P 500
Index. Among the reasons for the greater price volatility of these small
company and unseasoned stocks are the less certain growth prospects of smaller
firms and the lower degree of liquidity in the markets for such stocks.
 
  SPECIAL RISKS OF INVESTMENTS IN EMERGING MARKETS. Investing in the
securities of issuers in Emerging Countries involves risks in addition to
those discussed under "Description of Securities-- Foreign Investments." The
Growth and Income, Mid Cap Equity and Small Cap Value Funds may each invest up
to 25%, the Balanced Fund may invest up to 20% and the Capital Growth Fund may
invest up to 10% of their respective total assets in securities of issuers in
Emerging Countries. Emerging Countries are generally located in the Asia-
Pacific region, Eastern Europe, Latin and South America and Africa.
 
  Foreign investment in the securities markets of certain Emerging Countries
is restricted or controlled to varying degrees which may limit investment in
such countries or increase the administrative costs of such investments.
Certain countries may restrict or prohibit investment opportunities in issuers
or industries deemed important to national interests. Such restrictions may
affect the market price, liquidity and rights of securities that may be
purchased by a Fund. The repatriation of both investment income and capital
from certain Emerging Countries is subject to restrictions such as the need
for governmental consents. Many Emerging Countries may be subject to a greater
degree of economic, political and social instability than is the case in
Western Europe, the United States, Canada, Australia, New Zealand and Japan.
Many Emerging Countries do not have fully democratic governments. For example,
governments of some Emerging Countries are authoritarian in nature or have
been installed or removed as a result of military coups, while governments in
other Emerging Countries have periodically used force to suppress civil
dissent. Many Emerging Countries have experienced currency devaluations and
substantial and, in some cases, extremely high rates of inflation, which have
a negative effect on the economies and securities markets of such Emerging
Countries. Settlement procedures in Emerging Countries are frequently less
developed and reliable than those in the United States and may involve a
Fund's delivery of securities before receipt of payment for their sale. In
addition, significant delays are common in certain markets in registering the
transfer of securities. Settlement or registration problems may make it more
difficult for a Fund to value its portfolio securities and could cause the
Fund to miss attractive investment opportunities, to have a portion of its
assets uninvested or to incur losses due to the failure of a counterparty to
pay for securities the Fund has delivered or the Fund's inability to complete
its contractual obligations.
 
                                      35
<PAGE>
 
  RISKS OF INVESTING IN FIXED-INCOME SECURITIES. When interest rates decline,
the market value of fixed- income securities tends to increase. Conversely,
when interest rates increase, the market value of fixed income securities
tends to decline. Volatility of a security's market value will differ
depending upon the security's duration, the issuer and the type of instrument.
Investments in fixed-income securities are subject to the risk that the issuer
could default on its obligations and a Fund could sustain losses on such
investments. A default could impact both interest and principal payments.
 
  RISKS OF DERIVATIVE TRANSACTIONS. A Fund's transactions, if any, in options,
futures, options on futures, swaps, structured securities and currency
transactions involve certain risks, including a possible lack of correlation
between changes in the value of hedging instruments and the portfolio assets
(if any) being hedged, the potential illiquidity of the markets for derivative
instruments, the risks arising from margin requirements and related leverage
factors associated with such transactions. The use of these management
techniques to seek to increase total return may be regarded as a speculative
practice and involves the risk of loss if the Investment Adviser is incorrect
in its expectation of fluctuations in securities prices, interest rates or
currency prices. A Fund's use of certain derivative transactions may be
limited by the requirements of the Internal Revenue Code of 1986, as amended
(the "Code"), for qualification as a regulated investment company.
 
 
                            INVESTMENT RESTRICTIONS
 
  Each Fund is subject to certain investment restrictions that are described
in detail under "Investment Restrictions" in the Additional Statement.
Fundamental investment restrictions of a Fund cannot be changed without
approval of a majority of the outstanding Shares of that Fund as defined in
the Additional Statement. Each Fund's investment objectives and all policies
not specifically designated as fundamental are non-fundamental and may be
changed without shareholder approval. If there is a change in a Fund's
investment objectives, shareholders should consider whether that Fund remains
an appropriate investment in light of their then current financial positions
and needs.
 
 
                              PORTFOLIO TURNOVER
 
  A high rate of portfolio turnover (100% or more) involves correspondingly
greater expenses which must be borne by a Fund and its shareholders. See
"Financial Highlights" for a statement of each Fund's historical portfolio
turnover rate. The portfolio turnover rate is calculated by dividing the
lesser of the dollar amount of sales or purchases of portfolio securities by
the average monthly value of a Fund's portfolio securities, excluding
securities having a maturity at the date of purchase of one year or less. The
Investment Adviser will not consider the portfolio turnover rate a limiting
factor in making investment decisions for a Fund consistent with the Fund's
investment objectives and portfolio management policies.
 
 
                                  MANAGEMENT
 
TRUSTEES AND OFFICERS
 
  The Trustees are responsible for deciding matters of general policy and
reviewing the actions of the Investment Adviser, Distributor and transfer
agent. The officers of the Trust conduct and supervise each Fund's daily
business operations. The Additional Statement contains information as to the
identity of, and other information about, the Trustees and officers of the
Trust.
 
                                      36
<PAGE>
 
INVESTMENT ADVISERS
 
  INVESTMENT ADVISERS. Goldman Sachs Asset Management, One New York Plaza,
New York, New York 10004, a separate operating division of Goldman Sachs,
serves as investment adviser to the Balanced, Growth and Income, CORE Large
Cap Growth, CORE Small Cap Equity, Mid Cap Equity and Small Cap Value Funds.
Goldman Sachs registered as an investment adviser in 1981. Goldman Sachs Funds
Management, L.P., One New York Plaza, New York, New York 10004, a Delaware
limited partnership which is an affiliate of Goldman Sachs, serves as the
investment adviser to the CORE U.S. Equity and Capital Growth Funds. Goldman
Sachs Funds Management, L.P. registered as an investment adviser in 1990. The
Goldman Sachs Group, L.P., which controls the Investment Advisers, has
announced that it will pursue an initial public offering of the firm during
the fourth quarter of 1998; if the public offering is consummated, The Goldman
Sachs Group, L.P. will merge into the new public company, which will be called
The Goldman Sachs Group, Inc. As of July 24, 1998, GSAM and GSFM, together
with their affiliates, acted as investment adviser or distributor for assets
in excess of $168 billion.
 
  Under a Management Agreement with each Fund, the applicable Investment
Adviser, subject to the general supervision of the Trustees, provides day-to-
day advice as to the Fund's portfolio transactions. Goldman Sachs has agreed
to permit the Funds to use the name "Goldman Sachs" or a derivative thereof as
part of each Fund's name for as long as a Fund's Management Agreement is in
effect.
 
  In performing its investment advisory services, each Investment Adviser,
while remaining ultimately responsible for the management of the Funds, is
able to draw upon the research and expertise of its asset management
affiliates for portfolio decisions and management with respect to certain
portfolio securities. In addition, the Investment Adviser will have access to
the research of, and certain proprietary technical models developed by,
Goldman Sachs and may apply quantitative and qualitative analysis in
determining the appropriate allocations among the categories of issuers and
types of securities.
 
  Under the Management Agreement, the Investment Adviser also: (i) supervises
all non-advisory operations of each Fund that it advises; (ii) provides
personnel to perform such executive, administrative and clerical services as
are reasonably necessary to provide effective administration of each Fund;
(iii) arranges for at each Fund's expense (a) the preparation of all required
tax returns, (b) the preparation and submission of reports to existing
shareholders, (c) the periodic updating of prospectuses and Additional
Statements and (d) the preparation of reports to be filed with the SEC and
other regulatory authorities; (iv) maintains each Fund's records; and (v)
provides office space and all necessary office equipment and services.
 
 FUND MANAGERS
 
<TABLE>
<CAPTION>
                                                YEARS
                                                PRIMARILY
       NAME AND TITLE       FUND RESPONSIBILITY RESPONSIBLE     FIVE YEAR EMPLOYMENT HISTORY
  ------------------------- ------------------- ----------- ----------------------------
  <C>                       <C>                 <C>         <S>
  George D. Adler           Senior                 Since      Mr. Adler joined the
   Vice President           Portfolio Manager--    1997       Investment Adviser in
                            Capital Growth                    1997. From 1990 to 1997,
                                                              he was a portfolio
                                                              manager at Liberty
                                                              Investment Management,
                                                              Inc. From 1988 to 1990
                                                              he was a director of
                                                              portfolio management at
                                                              Banc One in Ohio.
- --------------------------------------------------------------------------------------------
  Eileen A. Aptman          Senior Portfolio       Since      Ms. Aptman joined the
   Vice President           Manager--              1996       Investment Adviser in
                            Mid Cap Equity         1997       1993. From 1990 to 1993,
                            Small Cap Value                   she worked at Delphi
                                                              Management as an equity
                                                              analyst, focusing her
                                                              research efforts on
                                                              value stocks.
- --------------------------------------------------------------------------------------------
  Jonathan A. Beinner       Senior Portfolio       Since      Mr. Beinner joined the
   Managing Director and    Manager--Balanced      1994       Investment Adviser in
   Co-Head U.S. Fixed       (Fixed Income)                    1990. From 1988 to 1990,
   Income                                                     he worked as a portfolio
                                                              manager at Franklin
                                                              Savings Association in
                                                              the trading and
                                                              arbitrage group.
</TABLE>
 
                                      37
<PAGE>
 
<TABLE>
<CAPTION>
                                                   YEARS
                                                   PRIMARILY
    NAME AND TITLE      FUND RESPONSIBILITY        RESPONSIBLE     FIVE YEAR EMPLOYMENT HISTORY
  ------------------ --------------------------    ----------- ----------------------------
  <C>                <C>                           <C>         <S>
  Melissa Brown         Senior Portfolio Manager--    Since      Ms. Brown joined the
   Vice President       CORE U.S. Equity              1998       Investment Adviser in
                        CORE Large Cap Growth         1998       1998. From 1984 to 1998,
                        CORE Small Cap Equity         1998       she was the director of
                                                                 Quantitative Equity
                                                                 Research and served on
                                                                 the Investment Policy
                                                                 Committee at Prudential
                                                                 Securities.
- -----------------------------------------------------------------------------------------------
  Kent A. Clark         Senior Portfolio Manager--    Since      Mr. Clark joined the
   Vice President       CORE U.S. Equity              1996       Investment Adviser in
                        CORE Large Cap Growth         1997       1992.
                        CORE Small Cap Equity         1997
- -----------------------------------------------------------------------------------------------
  Robert G. Collins     Senior Portfolio Manager--    Since      Mr. Collins joined the
   Vice President       Capital Growth                1997       Investment Adviser in
                                                                 1997. From 1991 to 1997,
                                                                 he was a portfolio
                                                                 manager at Liberty
                                                                 Investment Management,
                                                                 Inc. His past
                                                                 experiences include work
                                                                 as a special situations
                                                                 analyst with Raymond
                                                                 James & Associates for
                                                                 five years.
- -----------------------------------------------------------------------------------------------
  Herbert E. Ehlers     Senior Portfolio Manager--    Since      Mr. Ehlers joined the
   Managing Director    Capital Growth                1997       Investment Adviser in
                                                                 1997. From 1994 to 1997,
                                                                 he was the Chief
                                                                 Investment Officer and
                                                                 Chairman of Liberty
                                                                 Investment Management,
                                                                 Inc. He was a portfolio
                                                                 manager and president at
                                                                 Liberty's predecessor
                                                                 firm, Eagle Asset
                                                                 Management, from 1984 to
                                                                 1994.
- -----------------------------------------------------------------------------------------------
  Gregory H. Ekizian    Senior Portfolio Manager--    Since      Mr. Ekizian joined the
   Vice President       Capital Growth                1997       Investment Adviser in
                                                                 1997. From 1990 to 1997,
                                                                 he was a portfolio
                                                                 manager at Liberty
                                                                 Investment Management,
                                                                 Inc. and its predecessor
                                                                 firm, Eagle Asset
                                                                 Management.
- -----------------------------------------------------------------------------------------------
  Paul D. Farrell       Senior Portfolio Manager--    Since      Mr. Farrell joined the
   Vice President       Mid Cap Equity                1998       Investment Adviser in
                        Small Cap Value               1992       1991. In 1998, he became
                                                                 responsible for managing
                                                                 the Investment Adviser's
                                                                 Value team. During 1991,
                                                                 he served as a managing
                                                                 director at Plaza
                                                                 Investment Managers, the
                                                                 investment subsidiary of
                                                                 GEICO Corp., a major
                                                                 insurance company. From
                                                                 1986 to 1991, he was
                                                                 employed by Goldman
                                                                 Sachs as a vice
                                                                 president in the
                                                                 investment research
                                                                 department and was
                                                                 responsible for the
                                                                 formation of the firm's
                                                                 Emerging Growth Research
                                                                 Group.
- -----------------------------------------------------------------------------------------------
  Greg Gigliotti        Senior Portfolio Manager--    Since      Mr. Gigliotti joined the
   Vice President       Growth and Income             1998       Investment Adviser in
                        Balanced (Equity)             1998       1997. From 1996 to 1997
                        Mid Cap Equity                1998       he was a Vice President
                                                                 and senior analyst at
                                                                 Franklin Mutual
                                                                 Advisors, Inc., the
                                                                 asset management
                                                                 division of Franklin
                                                                 Resources, Inc. From
                                                                 1989 to 1996 he was a
                                                                 Vice President and
                                                                 senior analyst at Heine
                                                                 Securities Corporation
                                                                 which was purchased by
                                                                 Franklin Resources, Inc.
- -----------------------------------------------------------------------------------------------
  Robert C. Jones       Senior Portfolio Manager--    Since      Mr. Jones joined the
   Managing Director    CORE U.S. Equity              1991       Investment Adviser in
                        CORE Large Cap Growth         1997       1989. From 1987 to 1989,
                        CORE Small Cap Equity         1997       he was the senior
                                                                 quantitative analyst in
                                                                 the Goldman Sachs
                                                                 Investment Research
                                                                 Department and the
                                                                 author of the monthly
                                                                 Stock Selection
                                                                 publication.
</TABLE>
 
 
                                       38
<PAGE>
 
<TABLE>
<CAPTION>
                                                        YEARS
                                                        PRIMARILY
      NAME AND TITLE        FUND RESPONSIBILITY         RESPONSIBLE     FIVE YEAR EMPLOYMENT HISTORY
  ---------------------- --------------------------     ----------- ----------------------------
  <C>                    <C>                            <C>         <S>
  Richard C. Lucy            Senior Portfolio Manager--    Since      Mr. Lucy joined the
   Vice President and        Balanced (Fixed Income)       1994       Investment Adviser in
   Co-Head U.S.                                                       1992. From 1983 to 1992,
   Fixed Income                                                       he managed fixed income
                                                                      assets at Brown Brothers
                                                                      Harriman & Co.
- ----------------------------------------------------------------------------------------------------
  Matthew B. McLennan        Senior Portfolio Manager--    Since      Mr. McLennan joined the
   Vice President            Mid Cap Equity                1998       Investment Adviser in
                             Small Cap Value               1996       1995. From 1994 to 1995,
                                                                      he worked in the
                                                                      Investment Banking
                                                                      Division of Goldman
                                                                      Sachs in Australia. From
                                                                      1991 to 1994, Mr.
                                                                      McLennan worked at
                                                                      Queensland Investment
                                                                      Corporation in
                                                                      Australia.
- ----------------------------------------------------------------------------------------------------
  Victor H. Pinter           Senior Portfolio Manager--    Since      Mr. Pinter joined the
   Vice President            CORE U.S. Equity              1996       Investment Adviser in
                             CORE Large Cap Growth         1997       1990. From 1985 to 1990,
                             CORE Small Cap Equity         1997       he was a project manager
                                                                      in the Information
                                                                      Technology Division of
                                                                      the Investment Adviser.
- ----------------------------------------------------------------------------------------------------
  Thomas S. Price            Senior Portfolio Manager--    Since      Mr. Price joined the
   Vice President            Growth and Income             1998       Investment Adviser in
                             Balanced (Equity)             1998       1997. From 1996 to 1997
                             Mid Cap Equity                1998       he was a Vice President
                                                                      and senior analyst at
                                                                      Franklin Mutual
                                                                      Advisors, Inc., the
                                                                      asset management
                                                                      division of Franklin
                                                                      Resources, Inc. From
                                                                      1993 to 1996 he was a
                                                                      Vice President and
                                                                      senior analyst at Heine
                                                                      Securities Corporation
                                                                      which was purchased by
                                                                      Franklin Resources, Inc.
- ----------------------------------------------------------------------------------------------------
  David G. Shell             Senior Portfolio Manager--    Since      Mr. Shell joined the
   Vice President            Capital Growth                1997       Investment Adviser in
                                                                      1997. From 1987 to 1997,
                                                                      he was a portfolio
                                                                      manager at Liberty
                                                                      Investment Management,
                                                                      Inc. and its predecessor
                                                                      firm, Eagle Asset
                                                                      Management.
- ----------------------------------------------------------------------------------------------------
  Ernest C. Segundo, Jr.     Senior Portfolio Manager--    Since      Mr. Segundo joined the
   Vice President            Capital Growth                1997       Investment Adviser in
                                                                      1997. From 1992 to 1997,
                                                                      he was a portfolio
                                                                      manager at Liberty
                                                                      Investment Management,
                                                                      Inc. From 1990 to 1992,
                                                                      he was an equity
                                                                      research analyst with
                                                                      Fidelity Management &
                                                                      Research Company.
- ----------------------------------------------------------------------------------------------------
  Lawrence S. Sibley         Senior Portfolio Manager--    Since      Mr. Sibley joined the
   Vice President            Growth and Income             1997       Investment Adviser in
                             Balanced (Equity)             1997       1997. From 1994 to 1997,
                             Mid Cap Equity                1997       he headed Institutional
                                                                      Equity Sales at J.P.
                                                                      Morgan Securities and
                                                                      from 1987 to 1994, he
                                                                      was a principal of
                                                                      Sanford C. Bernstein &
                                                                      Co. in its Institutional
                                                                      Sales Department.
- ----------------------------------------------------------------------------------------------------
  Karma Wilson               Senior Portfolio Manager--    Since      Ms. Wilson joined the
   Vice President            Growth and Income             1998       Investment Adviser in
                             Balanced (Equity)             1998       1994. Prior to 1994, she
                             Mid Cap Equity                1998       was an investment
                                                                      analyst with Bankers
                                                                      Trust Australia Ltd.
                                                                      Before 1992 she was
                                                                      employed at Arthur
                                                                      Andersen LLP.
</TABLE>
 
 
  It is the responsibility of the Investment Adviser to make the investment
decisions for a Fund and to place the purchase and sale orders for the Fund's
portfolio transactions in U.S. and foreign markets. Such orders may be
directed to any broker including, to the extent and in the manner permitted by
applicable law, Goldman Sachs or its affiliates. In effecting purchases and
sales of portfolio securities for the Funds, the Investment Adviser will seek
the best price and execution of a Fund's orders. In doing so, where two or
more brokers or dealers offer comparable prices and execution for a particular
trade, consideration may be given to whether the broker or dealer provides
investment research or brokerage services or sells Shares of any Goldman Sachs
Fund. See the Additional Statement for a further description of the Investment
Adviser's brokerage allocation practices.
 
 
                                      39
<PAGE>
 
  As compensation for its services rendered and assumption of certain expenses
pursuant to separate Management Agreements, GSAM and GSFM are entitled to the
following fees, computed daily and payable monthly at the annual rates listed
below:
 
<TABLE>
<CAPTION>
                                                               FOR THE FISCAL
                                                CONTRACTUAL YEAR OR PERIOD ENDED
                                                   RATE*     JANUARY 31, 1998*
                                                ----------- --------------------
     <S>                                        <C>         <C>
     GSAM
     ----
     Balanced..................................    0.65%            0.65%
     Growth and Income.........................    0.70%            0.70%
     CORE Large Cap Growth.....................    0.75%            0.60%
     CORE Small Cap Equity.....................    0.85%            0.75%
     Mid Cap Equity............................    0.75%            0.75%
     Small Cap Value...........................    1.00%            1.00%
     GSFM
     ----
     CORE U.S. Equity..........................    0.75%            0.59%
     Capital Growth............................    1.00%            1.00%
</TABLE>
- ---------------------
*  All numbers are annualized. The difference, if any, between the stated fees
   and the actual fees paid by the Funds reflects that the applicable
   Investment Adviser did not charge the full amount of the fees to which it
   would have been entitled. Effective September 1, 1998, the management fee
   for the CORE U.S. Equity and CORE Small Cap Equity Funds will equal 0.70%
   and 0.85%, respectively. The Investment Adviser may discontinue or modify
   any limitations in the future at its discretion.
 
  The Investment Adviser has voluntarily agreed to reduce or limit certain
"Other Expenses" of the Funds (excluding management, distribution and service
fees, transfer agency fees, taxes, interest and brokerage fees and litigation,
indemnification and other extraordinary expenses) to the extent such expenses
exceed 0.01%, 0.05%, 0.00%, 0.00%, 0.04%, 0.00%, 0.10% and 0.06% per annum of
the average daily net assets of the Balanced, Growth and Income, CORE U.S.
Equity, CORE Large Cap Growth, CORE Small Cap Equity, Capital Growth, Mid Cap
Equity and Small Cap Value Funds, respectively. Such reductions or limits, if
any, may be discontinued or modified by the applicable Investment Adviser in
its discretion at any time.
 
  ACTIVITIES OF GOLDMAN SACHS AND ITS AFFILIATES AND OTHER ACCOUNTS MANAGED BY
GOLDMAN SACHS. The involvement of the Investment Adviser, Goldman Sachs and
their affiliates in the management of, or their interest in, other accounts
and other activities of Goldman Sachs may present conflicts of interest with
respect to a Fund or limit a Fund's investment activities. Goldman Sachs and
its affiliates engage in proprietary trading and advise accounts and funds
which have investment objectives similar to those of the Funds and/or which
engage in and compete for transactions in the same types of securities,
currencies and instruments as the Funds. Goldman Sachs and its affiliates will
not have any obligation to make available any information regarding their
proprietary activities or strategies, or the activities or strategies used for
other accounts managed by them, for the benefit of the management of the
Funds. The results of a Fund's investment activities, therefore, may differ
from those of Goldman Sachs and its affiliates and it is possible that a Fund
could sustain losses during periods in which Goldman Sachs and its affiliates
and other accounts achieve significant profits on their trading for
proprietary or other accounts. In addition, the Funds may, from time to time,
enter into transactions in which other clients of Goldman Sachs have an
adverse interest. From time to time, a Fund's activities may be limited
because of regulatory restrictions applicable to Goldman Sachs and its
affiliates, and/or their internal policies designed to comply with such
restrictions. See "Management--Activities of Goldman Sachs and its Affiliates
and Other Accounts Managed by Goldman Sachs" in the Additional Statement for
further information.
 
                                      40
<PAGE>
 
DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs, 85 Broad Street, New York, New York 10004, serves as the
exclusive distributor (the "Distributor") of each Fund's Shares. Shares may
also be sold by Authorized Dealers. Authorized Dealers include investment
dealers that are members of the NASD and certain other financial service
firms. To become an Authorized Dealer, a dealer or financial service firm must
enter into a sales agreement with Goldman Sachs. The minimum investment
requirements, services, programs and purchase and redemption options for
Shares purchased through a particular Authorized Dealer may be different from
those available to investors purchasing through other Authorized Dealers.
 
  Goldman Sachs, 4900 Sears Tower, Chicago, Illinois 60606, also serves as
each Fund's transfer agent (the "Transfer Agent") and as such performs various
shareholder servicing functions. As compensation for the services rendered to
each Fund by Goldman Sachs (as Transfer Agent), Goldman Sachs is entitled to a
fee with respect to each Fund's Class A, Class B and Class C Shares equal, on
an annual basis, to 0.19% of average daily net assets. Shareholders with
inquiries regarding any Fund should contact Goldman Sachs (as Transfer Agent)
at the address or the telephone number set forth on the back cover page of
this Prospectus.
 
  From time to time, Goldman Sachs or any of its affiliates may purchase and
hold Shares of the Funds. Goldman Sachs reserves the right to redeem at any
time some or all of the Shares acquired for its own account.
 
YEAR 2000
 
  Many computer systems were designed using only two digits to signify the
year (for example, "98" for "1998"). On January 1, 2000, if these computer
systems are not corrected, they may incorrectly interpret "00" as the year
"1900" rather than the year "2000," leading to computer shutdowns or errors
(commonly known as the "Year 2000 Problem"). To the extent these systems
conduct forward-looking calculations, these computer problems may occur prior
to January 1, 2000. Like other investment companies and financial and business
organizations, the Funds could be adversely affected in their ability to
process securities trades, price securities, provide shareholder account
services and otherwise conduct normal business operations if the computer
systems used by the Investment Adviser or other Fund service providers do not
adequately address this problem in a timely manner. The Investment Adviser has
established a dedicated group to analyze these issues and to implement the
systems modifications necessary to prepare for the Year 2000 Problem.
Currently, the Investment Adviser does not anticipate that the transition to
the 21st Century will have any material impact on its ability to continue to
service the Funds at current levels. In addition, the Investment Adviser has
sought assurances from the Funds' other service providers that they are taking
the steps necessary so that they do not experience Year 2000 Problems, and the
Investment Adviser will continue to monitor the situation. At this time,
however, no assurance can be given that the actions taken by the Investment
Adviser and the Funds' other service providers will be sufficient to avoid any
adverse effect on the Funds due to the Year 2000 Problem.
 
 
                                      41
<PAGE>
 
 
                                   EXPENSES
 
  The Funds are responsible for the payment of their expenses. The expenses
include, without limitation: fees payable to the Investment Adviser;
distribution and service fees; custodial and transfer agency fees; brokerage
fees and commissions; filing fees for the registration or qualification of the
Funds' Shares under federal or state securities laws, organizational expenses;
fees and expenses incurred in connection with membership in investment company
organizations; taxes; interest; costs of liability insurance, fidelity bonds
or indemnification; any costs, expenses or losses arising out of any liability
of, or claim for damages or other relief asserted against, the Funds for
violation of any law; legal and auditing fees and expenses (including the cost
of legal and certain accounting services rendered by employees of the
Investment Adviser and its affiliates with respect to the Funds); expenses of
preparing and setting in type prospectuses, Additional Statements, proxy
material, financial reports and notices and the printing and distributing of
the same to shareholders and regulatory authorities; compensation and expenses
of the Trust's "non-interested" Trustees; and extraordinary organizational
expenses, if any, incurred by the Trust.
 
 
                            REPORTS TO SHAREHOLDERS
 
  Shareholders will receive an annual report containing audited financial
statements and a semi-annual report. To eliminate unnecessary duplication,
only one copy of such reports may be sent to shareholders with the same
mailing address. Shareholders who desire a duplicate copy of such reports to
be mailed to their residence should contact Goldman Sachs at 800-526-7384.
Each shareholder will also be provided with a printed confirmation for each
transaction in the shareholder's account and an individual quarterly account
statement. A year-to-date statement for any account will be provided upon
request made to Goldman Sachs. The Funds do not generally provide sub-
accounting services.
 
 
                                 HOW TO INVEST
 
ALTERNATIVE PURCHASE ARRANGEMENTS
 
  Each Fund continuously offers through this Prospectus Class A, Class B and
Class C Shares, as described more fully in "How to Buy Shares of the Funds."
If you do not specify in your instructions to the Funds which class of Shares
you wish to purchase, the Funds will assume that your instructions apply to
Class A Shares.
 
  CLASS A SHARES. If you invest less than $1 million in Class A Shares you
will pay an initial sales charge. Certain purchases may qualify for reduced
initial sales charges. If you invest $1 million or more in Class A Shares of a
Fund, no sales charge will be imposed at the time of purchase, but you may
incur a deferred sales charge equal to 1.00% if you redeem your Shares within
18 months of purchase. Class A Shares are subject to distribution and service
fees of 0.25% per annum of each Fund's average daily net assets attributable
to Class A Shares.
 
                                      42
<PAGE>
 
  CLASS B SHARES. Class B Shares are sold without an initial sales charge, but
are subject to a CDSC of up to 5% if redeemed within six years of purchase.
Class B Shares are subject to distribution and service fees of 1.00% per annum
of each Fund's average daily net assets attributable to Class B Shares. See
"Distribution and Service Plans." Class B Shares will automatically convert to
Class A Shares, based on their relative NAVs, eight years after the initial
purchase. Your entire investment in Class B Shares is available to work for
you from the time you make your initial investment, but the distribution and
service fee paid by Class B Shares will cause your Class B Shares (until
conversion to Class A Shares) to have a higher expense ratio and to pay lower
dividends, to the extent dividends are paid, than Class A Shares.
 
  CLASS C SHARES. Class C Shares are sold without an initial sales charge, but
are subject to a CDSC of 1% if redeemed within 12 months of purchase. Class C
Shares are subject to distribution and service fees of 1.00% per annum of each
Fund's average daily net assets attributable to Class C Shares. See
"Distribution and Service Plans." Class C Shares have no conversion feature,
and accordingly, an investor that purchases Class C Shares will be subject to
the distribution and service fee imposed on Class C Shares for an indefinite
period, subject to annual approval by the Fund's Board of Trustees and certain
regulatory limitations. Your entire investment in Class C Shares is available
to work for you from the time you make your initial investment, but the
distribution and service fee paid by Class C Shares will cause your Class C
Shares to have a higher expense ratio and to pay lower dividends, to the
extent dividends are paid, than Class A Shares (or Class B Shares after
conversion to Class A Shares).
 
  FACTORS TO CONSIDER IN CHOOSING CLASS A, CLASS B OR CLASS C SHARES. The
decision as to which class to purchase depends on the amount you invest, the
intended length of the investment and your personal situation. For example, if
you are making an investment of $50,000 or more that qualifies for a reduced
sales charge, you should consider purchasing Class A Shares. A brief
description of when the initial sales charge may be reduced or eliminated is
set forth below under "Right of Accumulation" and "Statement of Intention." If
you prefer not to pay an initial sales charge on an investment and plan to
hold your investment for at least six years, you might consider purchasing
Class B Shares. If you prefer not to pay an initial sales charge and are
unsure of the length of your investment or plan to hold your investment for
less than eight years, you may prefer Class C Shares. There is no size limit
on the purchase of Class A Shares. A maximum purchase limitation of $250,000
and $1,000,000 in the aggregate normally applies to purchases of Class B
Shares and Class C Shares, respectively. Although Class C Shares are subject
to a CDSC for only 12 months and at a lower rate than Class B Shares, Class C
Shares do not have the conversion feature applicable to Class B Shares, making
them subject to higher distribution and service fees for an indefinite period.
Authorized Dealers may receive different compensation for selling Class A,
Class B or Class C Shares.
 
HOW TO BUY SHARES OF THE FUNDS--CLASS A, CLASS B AND CLASS C SHARES
 
  You may purchase Shares of the Funds through any Authorized Dealer
(including Goldman Sachs) or directly from a Fund, c/o National Financial Data
Services, Inc. ("NFDS"), P.O. Box 419711, Kansas City, MO 64141-6711 on any
Business Day (as defined under "Additional Information") at the NAV next
determined after receipt of an order as described below under "Other Purchase
Information," plus, in the case of Class A Shares, any applicable sales
charge. Currently, each Fund's NAV is determined as of the close of regular
trading on the New York Stock Exchange (which is normally, but not always,
4:00 p.m. New York time).
 
  The minimum initial investment in each Fund is $1,000. An initial investment
minimum of $250 applies to purchases in connection with tax-sheltered
retirement plans, Individual Retirement Account Plans (excluding SIMPLE IRAs
and Education IRAs) or accounts established under the Uniform Gift to Minors
Act ("UGMA"),
 
                                      43
<PAGE>
 
and an initial investment minimum of $200 applies to purchases in connection
with 403(b) plans. The minimum initial investment for purchases in connection
with SIMPLE and Education IRAs, as well as purchases through the Automatic
Investment Plan, is $50. The minimum subsequent investment is $50. These
requirements may be waived at the discretion of the Trust's officers.
 
  You may pay for purchases of Shares by check (except that the Trust will not
accept a check drawn on a foreign bank or a third party check), Federal
Reserve draft, federal funds wire, ACH transfer or bank wire. Purchases of
Shares by check or Federal Reserve draft should be made payable as follows:
(i) to an investor's Authorized Dealer, if purchased through such Authorized
Dealer, or (ii) to Goldman Sachs Domestic Equity Funds--(Name of Fund and
class of Shares) and sent to NFDS, P.O. Box 419711, Kansas City, MO 64141-
6711. Federal funds wires, ACH transfers and bank wires should be sent to
State Street Bank and Trust Company ("State Street"). Payment must be received
within three Business Days after receipt of the purchase order. An investor's
Authorized Dealer is responsible for forwarding payment promptly to the Fund.
 
  In order to make an initial investment in a Fund, an investor must establish
an account with the Fund by furnishing to the Fund, Goldman Sachs or the
investor's Authorized Dealer the information in the Account Application
attached to this Prospectus. The Funds may refuse to open an account for any
investor who fails to (i) provide a social security number or other taxpayer
identification number; or (ii) certify that such number is correct (if
required to do so under applicable law).
 
  The Funds reserve the right to redeem Shares of any shareholder whose
account balance is less than $50 as a result of earlier redemptions. Such
redemptions will not be implemented if the value of a shareholder's account
falls below the minimum account balance solely as a result of market
conditions. A Fund will give sixty (60) days' prior written notice to
shareholders whose Shares are being redeemed to allow them to purchase
sufficient additional Shares of the Fund to avoid such redemption. In
addition, the Funds and Goldman Sachs reserve the right to modify the minimum
investment, the manner in which Shares are offered and the sales charge rates
applicable to future purchases of Shares.
 
OFFERING PRICE--CLASS A SHARES
 
  The offering price of Class A Shares of each Fund is the next determined NAV
per Share plus a sales charge, if any, paid to Goldman Sachs at the time of
purchase of Shares as shown in the following table:
 
<TABLE>
<CAPTION>
                                                                SALES CHARGE   MAXIMUM DEALER
                                                SALES CHARGE AS AS PERCENTAGE   ALLOWANCE AS
       AMOUNT OF PURCHASE                        PERCENTAGE OF  OF NET AMOUNT   PERCENTAGE OF
(INCLUDING SALES CHARGE, IF ANY)                OFFERING PRICE    INVESTED    OFFERING PRICE***
- --------------------------------                --------------- ------------- -----------------
<S>                                             <C>             <C>           <C>
Less than $50,000..............................      5.50%          5.82%           5.00%
$50,000 up to (but less than) $100,000.........      4.75           4.99            4.00
$100,000 up to (but less than) $250,000........      3.75           3.90            3.00
$250,000 up to (but less than) $500,000........      2.75           2.83            2.25
$500,000 up to (but less than) $1 million......      2.00           2.04            1.75
$1 million or more.............................      0.00*          0.00*            **
</TABLE>
 
                                                       (footnotes on next page)
 
                                      44
<PAGE>
 
- --------
  * No sales charge is payable at the time of purchase of Class A Shares of $1
    million or more, but a CDSC may be imposed in the event of certain
    redemption transactions made within 18 months of purchase.
 
 ** Goldman Sachs pays a one-time commission to Authorized Dealers who
    initiate or are responsible for purchases of $1 million or more of Shares
    of the Funds equal to 1.00% of the amount under $3 million, 0.50% of the
    next $2 million, and 0.25% thereafter. Goldman Sachs may also pay, with
    respect to all or a portion of the amount purchased, a commission in
    accordance with the foregoing schedule to Authorized Dealers who initiate
    or are responsible for plans investing in the Funds which satisfy the
    criteria set forth in (h) below or "wrap" accounts purchasing $1 million
    or more which satisfy the criteria set forth in (i) below. Purchases by
    such plans will be made at NAV with no initial sales charge, but if all of
    the Shares held are redeemed within 18 months after the end of the
    calendar month in which such purchase was made, a CDSC, as described
    below, of 1.00% may be imposed upon the plan sponsor or the third party
    administrator. In addition, Authorized Dealers shall remit to Goldman
    Sachs such payments received in connection with "wrap" accounts in the
    event that Shares are redeemed within 18 months after the end of the
    calendar month in which the purchase was made.
 
*** During special promotions, the entire sales charge may be reallowed to
    Authorized Dealers. Authorized Dealers to whom substantially the entire
    sales charge is reallowed may be deemed to be "underwriters" under the
    Securities Act of 1933.
 
  Purchases of $1 million or more of Class A Shares will be made at NAV with
no initial sales charge, but if the Shares are redeemed within 18 months after
the end of the calendar month in which the purchase was made, excluding any
period of time in which the Shares were exchanged into and remained invested
in an ILA Portfolio (the "CDSC period"), a CDSC of 1.00% may be imposed
unless, in certain cases, the investor's Authorized Dealer enters into an
agreement with Goldman Sachs to return all or an applicable prorated portion
of its commission to Goldman Sachs. Any applicable CDSC will be assessed on an
amount equal to the lesser of the current market value or the original
purchase cost of the redeemed Class A Shares. Accordingly, no CDSC will be
imposed on increases in account value above the initial purchase price,
including any dividend or capital gains distributions which have been
reinvested in additional Class A Shares. Upon redemption of Shares subject to
a CDSC, shareholders will receive that portion of the appreciation in account
value attributable to the Shares actually redeemed. In determining whether a
CDSC applies to a redemption, it will be assumed that the redemption is first
made from any Class A Shares in your account that are not subject to the CDSC.
The CDSC is waived on redemptions in certain circumstances. See "Waiver or
Reduction of Contingent Deferred Sales Charges" below.
 
  Class A Shares of the Funds may be sold at NAV without payment of any sales
charge to: (a) Goldman Sachs, its affiliates or their respective officers,
partners, directors or employees (including retired employees and former
partners), any partnership of which Goldman Sachs is a general partner, any
Trustee or officer of the Trust and designated family members of any of the
above individuals; (b) qualified retirement plans of Goldman Sachs; (c)
trustees or directors of investment companies for which Goldman Sachs or an
affiliate acts as sponsor; (d) any employee or registered representative of
any Authorized Dealer or their respective spouses, children and parents; (e)
banks, trust companies or other types of depository institutions investing for
their own account or investing for accounts for which they have investment
discretion; (f) banks, trust companies or other types of depository
institutions investing for accounts for which they do not have investment
discretion; (g) any state, county or city, or any instrumentality, department,
authority or agency thereof, which is prohibited by applicable investment laws
from paying a sales charge or commission in connection with the purchase of
Shares of a Fund; (h) pension and profit sharing plans, pension funds and
other company-sponsored benefit plans that (1) buy Shares worth $500,000 or
more, or (2) have at the time of purchase, 100 or more eligible participants,
or (3) certify that they project to have annual plan purchases of $200,000 or
more, or (4) are provided administrative services by certain third-party
administrators that have entered into a special service arrangement with
Goldman Sachs relating to such plan; (i) "wrap" accounts for the benefit of
clients of broker-dealers, financial institutions
 
                                      45
<PAGE>
 
or financial planners, provided that they have entered into an agreement with
GSAM specifying aggregate minimums and certain operating policies and
standards; (j) registered investment advisers investing for accounts for which
they receive asset-based fees; (k) accounts over which GSAM or its advisory
affiliates have investment discretion; and (l) shareholders receiving
distributions from a qualified retirement plan invested in the Goldman Sachs
Funds and reinvesting such proceeds in a Goldman Sachs IRA. Purchasers must
certify eligibility for an exemption on the Account Application and notify
Goldman Sachs if the shareholder is no longer eligible for an exemption.
Exemptions will be granted subject to confirmation of a purchaser's
entitlement. Investors purchasing Shares of the Funds at NAV without payment
of any initial sales charge may be charged a fee if they effect transactions
in Shares through a broker or agent. In addition, under certain circumstances,
dividends and distributions from any of the Goldman Sachs Funds may be
reinvested in Shares of each Fund at NAV, as described under "Cross-
Reinvestment of Dividends and Distributions and Automatic Exchange Program."
 
RIGHT OF ACCUMULATION--CLASS A SHARES
 
  Class A purchasers may qualify for reduced sales charges when the current
market value of holdings (Shares at current offering price), plus new
purchases, reaches $50,000 or more. Class A Shares of the Goldman Sachs Funds
may be combined under the Right of Accumulation. See the Additional Statement
for more information about the Right of Accumulation.
 
STATEMENT OF INTENTION--CLASS A SHARES
 
  Purchases of $50,000 or more made over a 13-month period are eligible for
reduced sales charges. Class A Shares of the Goldman Sachs Funds may be
combined under the Statement of Intention. See the Additional Statement for
more information about the Statement of Intention.
 
OFFERING PRICE--CLASS B SHARES
 
  Investors may purchase Class B Shares of the Funds at the next determined
NAV without the imposition of an initial sales charge. However, Class B Shares
redeemed within six years of purchase will be subject to a CDSC at the rates
shown in the table below. At redemption, the charge will be assessed on the
amount equal to the lesser of the current market value or the original
purchase cost of the Shares being redeemed. No CDSC will be imposed on
increases in account value above the initial purchase price, including Shares
derived from the reinvestment of dividends or capital gains distributions.
Upon redemption of Shares subject to a CDSC, shareholders will receive that
portion of the appreciation in account value attributable to the Shares
actually redeemed.
 
  The amount of the CDSC, if any, will vary depending on the number of years
from the time of purchase until the time of redemption of Class B Shares. For
the purpose of determining the number of years from the time of any purchase,
all payments during a month will be aggregated and deemed to have been made on
the first day of that month. In processing redemptions of Class B Shares, the
Funds will first redeem Shares not subject to any CDSC, and then Shares held
longest during the applicable period.
 
<TABLE>
<CAPTION>
                                                                 CDSC AS A
                                                                 PERCENTAGE OF
   YEAR SINCE                                                    DOLLAR AMOUNT
   PURCHASE                                                      SUBJECT TO CDSC
   ----------                                                    ---------------
   <S>                                                           <C>
   First........................................................      5.0%
   Second.......................................................      4.0%
   Third........................................................      3.0%
   Fourth.......................................................      3.0%
   Fifth........................................................      2.0%
   Sixth........................................................      1.0%
   Seventh and thereafter.......................................      none
</TABLE>
 
                                      46
<PAGE>
 
  Proceeds from the CDSC are payable to the distributor and may be used in
whole or part to defray the distributor's expenses related to providing
distribution-related services to the Funds in connection with the sale of
Class B Shares, including the payment of compensation to Authorized Dealers. A
commission equal to 4.00% of the amount invested is paid to Authorized
Dealers.
 
  Class B Shares of a Fund will automatically convert into Class A Shares of
the same Fund at the end of the calendar quarter that is eight years after the
purchase date, except as noted below. Class B Shares of a Fund acquired by
exchange from Class B Shares of another Goldman Sachs Fund will convert into
Class A Shares of such Fund based on the date of the initial purchase. Class B
Shares acquired through reinvestment of distributions will convert into Class
A Shares based on the date of the initial purchase of the Shares on which the
distribution was paid. The conversion of Class B Shares to Class A Shares will
not occur at any time the Funds are advised that such conversions may
constitute taxable events for federal tax purposes, which the Funds believe is
unlikely. If conversions do not occur as a result of possible taxability,
Class B Shares would continue to be subject to higher expenses than Class A
Shares for an indeterminate period.
 
OFFERING PRICE--CLASS C SHARES
 
  Investors may purchase Class C Shares of the Funds at the next determined
NAV without the imposition of an initial sales charge. However, if Class C
Shares are redeemed within 12 months of purchase, a CDSC of 1% will be
deducted from the redemption proceeds. At redemption, the charge will be
assessed on the amount equal to the lesser of the current market value or the
original purchase cost of the Shares being redeemed. No CDSC will be imposed
on increases in account value above the initial purchase price, including
Shares derived from the reinvestment of dividends or capital gains
distributions. Upon redemption of Shares subject to a CDSC, shareholders will
receive that portion of the appreciation in account value attributable to the
Shares actually redeemed.
 
  For the purpose of determining the number of months from the time of any
purchase, all payments during a month will be aggregated and deemed to have
been made on the first day of that month. In processing redemptions of Class C
Shares, the Funds will first redeem Shares held for longer than 12 months, and
then Shares held for the longest period during the 12 month period. Proceeds
from the CDSC are payable to the Distributor and may be used in whole or in
part to defray the Distributor's expenses related to providing distribution-
related services to the Funds in connection with the sale of Class C Shares,
including the payment of compensation to Authorized Dealers. An amount equal
to 1.00% of the amount invested is paid by the Distributor to Authorized
Dealers.
 
REINVESTMENT OF REDEMPTION PROCEEDS--CLASS A, CLASS B AND CLASS C SHARES
 
  A shareholder who redeems Class A or Class B Shares of a Fund may reinvest
at NAV any portion or all of the redemption proceeds (plus that amount
necessary to acquire a fractional Share to round off his purchase to the
nearest full Share) in Class A Shares of the same Fund or any other Goldman
Sachs Fund. A shareholder who redeems Class C Shares of a Fund may reinvest at
NAV any portion or all of the redemption proceeds (plus that amount necessary
to acquire a fractional Share to round off the purchase to the nearest full
Share) in Class C Shares of the same Fund or any other Goldman Sachs Fund.
Shareholders should obtain and read the applicable prospectuses of such other
funds and consider their objectives, policies and applicable fees before
investing in any of such funds. This reinvestment privilege is subject to the
condition that the Shares redeemed have been held for at least thirty (30)
days before the redemption and that the reinvestment is effected within ninety
(90) days after such redemption. If you redeemed Class A or Class C Shares,
paid a CDSC upon redemption and
 
                                      47
<PAGE>
 
reinvest in Class A or Class C Shares subject to the conditions set forth
above, your account will be credited with the amount of the CDSC previously
charged, and the reinvested Shares will continue to be subject to a CDSC. In
this case, the holding period of the Class A or Class C Shares acquired
through reinvestment for purposes of computing the CDSC payable upon a
subsequent redemption will include the holding period of the redeemed Shares.
If you redeemed Class B Shares and paid a CDSC upon redemption, you are
permitted to reinvest the redemption proceeds in Class A Shares at NAV as
described above, but the amount of the CDSC paid upon redemption will not be
credited to your account.
 
  A reinvesting shareholder may be subject to tax as a result of such
redemption. If the redemption occurs within 90 days after the original
purchase of Class A Shares, any sales charge paid on the original purchase
cannot be taken into account by a reinvesting shareholder to the extent an
otherwise applicable sales charge is not imposed pursuant to the reinvestment
privilege for purposes of determining gain or loss, if any, realized on the
redemption, but instead will be added to the tax basis of the Class A Shares
received in the reinvestment. To the extent that any loss is realized and
Shares of the same Fund are purchased within 30 days before or after the
redemption, some or all of the loss may not be allowed as a deduction
depending upon the number of Shares purchased. Shareholders should consult
their own tax advisers concerning the tax consequences of a redemption and
reinvestment. Upon receipt of a written request, the reinvestment privilege
may be exercised once annually by a shareholder, except that there is no such
time limit as to the availability of this privilege in connection with
transactions the sole purpose of which is to reinvest the proceeds at NAV in a
tax-sheltered retirement plan.
 
WAIVER OR REDUCTION OF CONTINGENT DEFERRED SALES CHARGE--CLASS A, B AND C
SHARES
 
  The CDSC on Class B, Class C and Class A Shares that are subject to a CDSC
may be waived or reduced if the redemption relates to: (a) retirement
distributions or loans to participants or beneficiaries from pension and
profit sharing plans, pension funds and other company-sponsored benefit plans
(each a "Plan"); (b) the death or disability (as defined in Section 72(m)(7)
of the Code) of a participant or beneficiary in a Plan; (c) hardship
withdrawals by a participant or beneficiary in a Plan; (d) satisfying the
minimum distribution requirements of the Code; (e) the establishment of
"substantially equal periodic payments" as described in Section 72(t)(2) of
the Code; (f) the separation from service by a participant or beneficiary in a
Plan; (g) the death or disability (as defined in Section 72(m)(7) of the Code)
of a shareholder if the redemption is made within one year of such event; (h)
excess contributions distributed from a Plan; (i) distributions from a
qualified retirement plan invested in the Goldman Sachs Funds which are being
rolled over to a Goldman Sachs IRA; and (j) redemption proceeds which are to
be reinvested in accounts or non-registered products over which GSAM or its
advisory affiliates have investment discretion. In addition, Class A, Class B
and Class C Shares subject to a Systematic Withdrawal Plan may be redeemed
without a CDSC. However, Goldman Sachs reserves the right to limit such
redemptions, on an annual basis, to 12% each of the value of your Class B and
Class C Shares and 10% of the value of your Class A Shares.
 
 
                      SERVICES AVAILABLE TO SHAREHOLDERS
 
AUTOMATIC INVESTMENT PLAN
 
  Systematic cash investments may be made through a shareholder's bank via the
Automated Clearing House Network or a shareholder's checking account via bank
draft each month. Required forms are available from Goldman Sachs or any
Authorized Dealer.
 
                                      48
<PAGE>
 
CROSS-REINVESTMENT OF DIVIDENDS AND DISTRIBUTIONS AND AUTOMATIC EXCHANGE
PROGRAM
 
  A shareholder may elect to cross-reinvest dividends and capital gain
distributions paid by a Fund in Shares of the same class or an equivalent
class of other Goldman Sachs Funds or ILA Portfolios. See "Fund Highlights." A
shareholder may also elect to exchange automatically a specified dollar amount
of Shares of a Fund for Shares of the same Class or an equivalent class of any
other Goldman Sachs Fund or ILA Portfolio. Shares acquired through cross-
reinvestment of dividends or the automatic exchange program will be purchased
at NAV and will not be subject to any initial sales charge or CDSC as a result
of the cross-reinvestment or exchange, but Shares subject to a CDSC acquired
under the automatic exchange program may be subject to a CDSC at the time of
redemption from the fund into which the exchange is made determined on the
basis of the date and value of the investor's initial purchase of the Fund
from which the exchange (or any prior exchange) is made. Automatic exchanges
are made monthly on the 15th day of each month or the first Business Day
thereafter. The minimum dollar amount for automatic exchanges must be at least
$50 per month. Cross-reinvestments and automatic exchanges are subject to the
following conditions: (i) the value of the shareholder's account(s) in the
Fund which is paying the dividend or from which the automatic exchange is
being made must equal or exceed $5,000; and (ii) the value of the account in
the acquired fund must equal or exceed the acquired fund's minimum initial
investment requirement or the shareholder must elect to continue cross-
reinvestment or automatic exchanges until the value of acquired fund Shares in
the shareholder's account equals or exceeds the acquired fund's minimum
initial investment requirement. A Fund shareholder may elect cross-
reinvestment into an identical account or an account registered in a different
name or with a different address, social security or other taxpayer
identification number, provided that the account in the acquired fund has been
established, appropriate signatures have been obtained and the minimum initial
investment requirement has been satisfied. A Fund shareholder should obtain
and read the prospectus of the fund into which dividends are invested or
automatic exchanges are made.
 
TAX-SHELTERED RETIREMENT PLANS
 
  The Funds offer their Shares for purchase by retirement plans, including
traditional and Roth IRAs for individuals and their spouses, IRA plans for
employees in connection with employer sponsored SEP, SAR-SEP and SIMPLE IRA
plans, 403(b) plans and defined contribution plans such as 401(k) Salary
Reduction Plans. Detailed information concerning these plans may be obtained
from the Transfer Agent. The information sets forth the service fee charged
for retirement plans and describes the federal income tax consequences of
establishing a plan. This information should be read carefully, and
consultation with an attorney or tax adviser may be advisable.
 
EXCHANGE PRIVILEGE
 
  Shares of a Fund may be exchanged at NAV without the imposition of an
initial sales charge or CDSC at the time of exchange for Shares of the same
class or an equivalent class of any other Fund, Goldman Sachs Fund or ILA
Portfolio. A shareholder needs to obtain and read the prospectus of the fund
into which the exchange is made. The Shares of these other funds acquired by
an exchange may later be exchanged for Shares of the same class (or an
equivalent class) of the original Fund at the next determined NAV without the
imposition of an initial sales charge or CDSC if the dollar amount in the Fund
resulting from such exchanges is below the shareholder's all-time highest
dollar amount on which it has previously paid the applicable sales charge.
Shares of these other funds purchased through dividends and/or capital gains
reinvestment may be exchanged for Shares of the Funds without a sales charge.
In addition to free automatic exchanges pursuant to the Automatic Exchange
Program, six free exchanges are permitted in each 12 month period. A fee of
$12.50 may be charged for each subsequent exchange during such period. The
exchange privilege may be materially modified or withdrawn at any time upon 60
days' notice to shareholders and is subject to certain limitations.
 
                                      49
<PAGE>
 
  An exchange of Shares subject to a CDSC will not be subject to the
applicable CDSC at the time of exchange. Shares subject to a CDSC acquired in
an exchange will be subject to the CDSC of the Shares originally held. For
purposes of determining the amount of any applicable CDSC, the length of time
a shareholder has owned Shares will be measured from the date the shareholder
acquired the original Shares subject to a CDSC and will not be affected by any
subsequent exchange.
 
  An exchange may be made by identifying the applicable Fund and Class of
Shares and either writing to Goldman Sachs, Attention: Goldman Sachs Domestic
Equity Funds, Shareholder Services, c/o NFDS, P.O. Box 419711, Kansas City, MO
64141-6711 or, unless the investor has specifically declined telephone
exchange privileges on the Account Application or elected in writing not to
utilize telephone exchanges, by a telephone request to the Transfer Agent at
800-526-7384 (7:00 a.m. to 3:00 p.m. Chicago time). Certain procedures are
employed to prevent unauthorized or fraudulent exchange requests as set forth
under "How to Sell Shares of the Funds." Under the telephone exchange
privilege, Shares may be exchanged among accounts with different names,
addresses and social security or other taxpayer identification numbers only if
the exchange instructions are in writing and received in accordance with the
procedures set forth under "How to Sell Shares of the Funds." In times of
drastic economic or market changes the telephone exchange privilege may be
difficult to implement.
 
  For federal income tax purposes, an exchange, including an automatic
exchange, is treated as a redemption of the Shares surrendered in the
exchange, on which an investor may be subject to tax, followed by a purchase
of Shares received in the exchange. If such redemption occurs within ninety
(90) days after the purchase of such Shares, to the extent a sales charge that
would otherwise apply to the Shares received in the exchange is not imposed,
the sales charge paid on such purchase of Class A Shares cannot be taken into
account by the exchanging shareholder for purposes of determining gain or
loss, if any, realized on such redemption for federal income tax purposes, but
instead will be added to the tax basis of the Shares received in the exchange.
Shareholders should consult their own tax advisers concerning the tax
consequences of an exchange.
 
  Eligible investors may exchange certain classes of Shares for another class
of Shares of the same Fund. For further information, call Goldman Sachs at the
number set forth on the back of the Prospectus.
 
  All exchanges which represent an initial investment in a Fund must satisfy
the minimum investment requirements of the Fund into which the Shares are
being exchanged. Exchanges are available only in states where exchanges may
legally be made.
 
OTHER PURCHASE INFORMATION
 
  Authorized Dealers and other financial intermediaries may be authorized to
accept, on the Trust's behalf, purchase, redemption and exchange orders placed
by or on behalf of their customers and, if approved by the Trust, to designate
other intermediaries to accept such orders. In these cases, a Fund will be
deemed to have received an order that is in proper form when the order is
accepted by an Authorized Dealer or intermediary on a Business Day, and the
order will be priced at a Fund's NAV per Share (adjusted for any applicable
sales charge) next determined after such acceptance. Otherwise, a Fund or
Goldman Sachs must receive an order in proper form before it is effective.
Authorized Dealers and intermediaries will be responsible for transmitting
accepted orders to the Funds within the period agreed upon by them. Customers
should contact their Authorized Dealers or intermediaries to learn whether
they are authorized to accept orders for the Trust.
 
  Authorized Dealers and other financial intermediaries provide varying
arrangements for their clients to purchase and redeem Fund Shares. Some may
establish higher minimum investment requirements and others may limit the
availability of certain privileges with respect to the purchase and redemption
of Shares or the
 
                                      50
<PAGE>
 
reinvestment of dividends. Firms may arrange with their clients for other
investment or administrative services and may independently establish and
charge additional fees not described in this Prospectus to their clients for
such services. If Shares of a Fund are held in a "street name" account or were
purchased through an Authorized Dealer, shareholders should contact the
Authorized Dealer to purchase, redeem or exchange Shares, to make changes in
or give instructions concerning the account or to obtain information about the
account.
 
  The Funds and Goldman Sachs each reserves the right to reject any specific
purchase order (including exchanges) or to restrict purchases or exchanges by
a particular purchaser (or group of related purchasers). This may occur, for
example, when a purchaser or a group of purchasers' pattern of frequent
purchases, sales or exchanges of Shares of a Fund is evident, or if purchases,
sales or exchanges are, or a subsequent abrupt redemption might be, of a size
that would disrupt management of a Fund.
 
  In the sole discretion of Goldman Sachs, a Fund may accept securities
instead of cash for the purchase of Shares of the Fund. Such purchases will be
permitted only if the Investment Adviser determines that any securities
acquired in this manner are consistent with the Fund's investment objectives,
restrictions and policies and are desirable investments for the Fund.
 
  The Investment Adviser, Distributor, and/or their affiliates also pay
additional compensation, from time to time, out of their assets and not as an
additional charge to the Funds, to selected Authorized Dealers and other
persons in connection with the sale, distribution and/or servicing of Shares
of the Funds and other Goldman Sachs Funds (such as additional payments based
on new sales, amounts exceeding pre-established thresholds, or the length of
time their customers' assets have remained in a Fund) and, subject to
applicable NASD regulations, contribute to various non-cash and cash incentive
arrangements to promote the sale of Shares, as well as sponsor various
educational programs, sales contests and/or promotions in which participants
may receive reimbursement of expenses, entertainment and prizes such as travel
awards, merchandise, cash, investment research and educational information and
related support materials. This additional compensation can vary among
Authorized Dealers depending upon such factors as the amounts their customers
have invested (or may invest) in particular Goldman Sachs Funds, the
particular program involved, or the amount of reimbursable expenses.
Additional compensation based on sales may, but is currently not expected to,
exceed 0.50% (annualized) of the amount invested. For further information, see
"Other Information Regarding Purchases, Redemptions, Exchanges and Dividends"
in the Additional Statement.
 
 
                        DISTRIBUTION AND SERVICE PLANS
 
  The Trust has adopted distribution and service plans on behalf of the Funds'
Class A, Class B and Class C Shares (each a "Plan"). Under the Plans, Goldman
Sachs is entitled to a monthly fee from each Fund for distribution services
equal, on an annual basis, to 0.25%, 0.75% and 0.75%, respectively, of a
Fund's average daily net assets attributable to Class A, Class B and Class C
Shares, respectively.
 
  Goldman Sachs may use this distribution fee for its expenses of distributing
Class A, Class B and Class C Shares of the Funds. The types of expenses for
which Goldman Sachs may be compensated for distribution services under the
Plans include: compensation paid to and expenses incurred by Authorized
Dealers, Goldman Sachs and their respective officers, employees and sales
representatives; commissions paid to Authorized Dealers; allocable overhead;
telephone and travel expenses; interest expenses and other costs associated
with the
 
                                      51
<PAGE>
 
financing of such compensation and expenses; the printing of prospectuses for
prospective shareholders; preparation and distribution of sales literature and
advertising of any type; and all other expenses incurred in connection with
activities primarily intended to result in the sale of Class A, Class B and
Class C Shares. Goldman Sachs may also use payments under the Class A Plan for
personal and account maintenance services as described below. The aggregate
compensation that may be received under the Plans for distribution services
may not exceed the limitations imposed by the NASD's Conduct Rules. Payments
for distribution services are also subject to the requirements of Rule 12b-1
under the Act.
 
  Under the Plans for Class B and Class C Shares, Goldman Sachs is also
entitled to receive a separate fee equal on an annual basis to 0.25% of each
Fund's average daily net assets attributable to Class B or Class C Shares.
This fee is for personal and account maintenance services, and may be used to
make payments to Goldman Sachs, Authorized Dealers and their officers, sales
representatives and employees for responding to inquiries of, and furnishing
assistance to, shareholders regarding ownership of their Shares or their
accounts or similar services not otherwise provided on behalf of the Funds. If
the distribution or service fees received by Goldman Sachs pursuant to the
Plans exceed its expenses, Goldman Sachs may realize a profit from these
arrangements. The Plans will be reviewed and are subject to approval annually
by the Trustees.
 
  In connection with the sale of Class C Shares, Goldman Sachs begins paying
the 0.75% distribution fee as an ongoing commission, and the 0.25% ongoing
service fee, to Authorized Dealers after the Shares have been held for one
year. All of these fees are paid by Goldman Sachs on a quarterly basis.
 
 
                        HOW TO SELL SHARES OF THE FUNDS
 
  Each Fund will redeem its Shares upon the request of a shareholder on any
Business Day at the NAV next determined after the receipt of such request in
proper form, subject to any applicable CDSC. See "Net Asset Value." Redemption
proceeds will normally be mailed by check to a shareholder within three
Business Days of receipt of a properly executed request. If the Shares to be
redeemed were recently purchased by check, a Fund may delay transmittal of
redemption proceeds until such time as it has assured itself that good funds
have been collected for the purchase of such Shares. This may take up to 15
days. Redemption requests may be made by writing to or calling the Transfer
Agent at the address or telephone number set forth on the back cover page of
this Prospectus or an Authorized Dealer.
 
  The Trust accepts telephone requests for redemption of Shares for amounts up
to $50,000 within any seven calendar day period, except for investors who have
specifically declined telephone redemption privileges on the Account
Application or elected in writing not to utilize telephone redemptions
(proceeds which are sent to a Goldman Sachs brokerage account are not subject
to the $50,000 limit). It may be difficult to implement redemptions by
telephone in times of drastic economic or market changes. By completing an
Account Application, an investor agrees that the Trust, the Distributor and
the Transfer Agent shall not be liable for any loss incurred by the investor
by reason of the Trust accepting unauthorized telephone redemption requests if
the Trust reasonably believes the instructions to be genuine. Thus,
shareholders risk possible losses in the event of a telephone redemption not
authorized by them. The Trust may accept telephone redemption instructions
from any person identifying himself or herself as the owner of an account or
the owner's broker where the owner has not declined in writing to utilize this
service.
 
                                      52
<PAGE>
 
  In an effort to prevent unauthorized or fraudulent redemption and exchange
requests by telephone, Goldman Sachs and NFDS each employ reasonable
procedures specified by the Trust to confirm that such instructions are
genuine. Consequently, proceeds of telephone redemption requests will be sent
only to the shareholder's address of record or authorized bank account
designated in the Account Application and exchanges of Shares will be made
only to an identical account. Telephone requests will also be recorded. The
Trust may implement other procedures from time to time concerning telephone
redemptions and exchanges. If reasonable procedures are not employed, the
Trust may be liable for any loss due to unauthorized or fraudulent
transactions. Proceeds of telephone redemptions will be mailed to the
shareholder's address of record or wired to the authorized bank account
indicated on the Account Application, unless the shareholder provides written
instructions (accompanied by a signature guarantee) indicating another
address. Telephone redemptions will not be accepted during the 30-day period
following any change in a shareholder's address of record. This redemption
option does not apply to Shares held in a "street name" account. Shareholders
whose accounts are held in "street name" should contact their broker of record
who may effect telephone redemptions on their behalf. The Trust reserves the
right to terminate or modify the telephone redemption service at any time.
 
  Written requests for redemptions must be signed by each shareholder with its
signature guaranteed by a bank, a securities broker or dealer, a credit union
having authority to issue signature guarantees, a savings and loan
association, a building and loan association, a cooperative bank, a federal
savings bank or association, a national securities exchange, a registered
securities association or a clearing agency, provided that such institution
satisfies the standards established by the Transfer Agent.
 
  The Funds will also arrange for the proceeds of redemptions effected by any
means to be wired as federal funds to the bank account designated in the
shareholder's Account Application. Redemption proceeds will normally be wired
on the next Business Day in federal funds (for a total of one Business Day
delay) following receipt of a properly executed wire transfer redemption
request. Wiring of redemption proceeds may be delayed one additional Business
Day if the Federal Reserve Bank is closed on the day redemption proceeds would
ordinarily be wired. A transaction fee of $7.50 may be charged for payments of
redemption proceeds by wire. In order to change the bank designated on the
Account Application to receive redemption proceeds, a written request must be
received by the Transfer Agent. This request must be signature guaranteed as
set forth above. Further documentation may be required for executors, trustees
or corporations. Once wire transfer instructions have been given by Goldman
Sachs or an Authorized Dealer, neither a Fund, the Trust, Goldman Sachs nor
any Authorized Dealer assumes any further responsibility for the performance
of intermediaries or the shareholder's bank in the transfer process. If a
problem with such performance arises, the shareholder should deal directly
with such intermediaries or bank.
 
  Additional documentation regarding a redemption by any means may be required
to effect a redemption when deemed appropriate by the Transfer Agent. The
request for such redemption will not be considered to have been received in
proper form until such additional documentation has been received.
 
SYSTEMATIC WITHDRAWAL PLAN
 
  A shareholder may draw on shareholdings systematically via check or ACH in
any amount specified by the shareholder over $50. Checks are only available on
or about the 25th of each month. Each systematic withdrawal is a redemption
and therefore a taxable transaction. A minimum balance of $5,000 in Shares of
a Fund is required. The maintenance of a withdrawal plan concurrently with
purchases of additional Class A, Class B or Class C Shares would be
disadvantageous because of the sales charge imposed on your purchases of Class
A Shares or the imposition of a CDSC on your redemptions of Class A, Class B
or Class C Shares. The CDSC
 
                                      53
<PAGE>
 
applicable to Class A, Class B or Class C Shares redeemed under a systematic
withdrawal plan may be waived. See "How to Invest--Waiver or Reduction of
Contingent Deferred Sales Charge." See the Additional Statement for more
information about the Systematic Withdrawal Plan.
 
 
                                   DIVIDENDS
 
  Each dividend from net investment income and capital gains distributions, if
any, declared by a Fund on its outstanding Shares will, at the election of
each shareholder, be paid in: (i) cash; (ii) additional Shares of the same
class of the Fund; or (iii) Shares of the same or an equivalent class of other
Goldman Sachs Funds or units of the ILA Portfolios (the Prime Obligations
Portfolio only for Class B and Class C), as described under "Cross-
Reinvestment of Dividends and Distributions and Automatic Exchange Program."
This election should initially be made on a shareholder's Account Application
and may be changed upon written notice to Goldman Sachs at any time prior to
the record date for a particular dividend or distribution. If no election is
made, all dividends from net investment income and capital gain distributions
will be reinvested in the applicable Fund.
 
  The election to reinvest dividends and distributions paid by a Fund in
additional Shares or units of the Fund or another Goldman Sachs Fund or ILA
Portfolio will not affect the tax treatment of such dividends and
distributions, which will be treated as received by the shareholder and then
used to purchase Shares or units of the Fund, another Goldman Sachs Fund or an
ILA Portfolio.
 
  Each Fund intends that all or substantially all of its net investment income
and net realized capital gains, after reduction by available capital losses,
including any capital losses carried forward from prior years, will be
declared as dividends for each taxable year. The Balanced and Growth and
Income Funds will pay dividends from net investment income quarterly. Each
other Fund will pay dividends at least annually. All of the Funds will pay
dividends from net investment income, and dividends from net realized capital
gains, reduced by available capital losses, at least annually. From time to
time, a portion of any Fund's dividends may constitute a return of capital.
 
  At the time of an investor's purchase of Shares of a Fund a portion of the
NAV per Share may be represented by undistributed income of the Fund or
realized or unrealized appreciation of the Fund's portfolio securities.
Therefore, subsequent distributions on such Shares from such income or
realized appreciation may be taxable to the investor even if the NAV of the
investor's Shares is, as a result of the distributions, reduced below the cost
of such Shares and the distributions (or portions thereof) represent a return
of a portion of the purchase price.
 
 
                                NET ASSET VALUE
 
  The NAV per Share of each Class of a Fund is calculated by the Fund's
custodian as of the close of regular trading on the New York Stock Exchange
(which is normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m. New York
time), on each Business Day (as such term is defined under "Additional
Information"). The NAV per Share of each Class is calculated by determining
the net assets attributed to each Class and dividing by the number of
outstanding Shares of that Class. Portfolio securities are valued based on
market quotations or, if accurate quotations are not readily available, at
fair value as determined in good faith under procedures established by the
Trustees.
 
                                      54
<PAGE>
 
 
                            PERFORMANCE INFORMATION
 
  From time to time each Fund may publish average annual total return and the
Balanced and Growth and Income Funds may publish their yield and distribution
rates in advertisements and communications to shareholders or prospective
investors. Average annual total return is determined by computing the average
annual percentage change in value of $1,000 invested at the maximum public
offering price for specified periods ending with the most recent calendar
quarter, assuming reinvestment of all dividends and distributions at NAV. The
total return calculation assumes a complete redemption of the investment at
the end of the relevant period. Total return calculations for Class A Shares
reflect the effect of paying the maximum initial sales charge. Investment at a
lower sales charge would result in higher performance figures. Total return
calculations for Class B and Class C Shares reflect deduction of the
applicable CDSC imposed upon redemption of Class B and Class C Shares held for
the applicable period. Each Fund may also from time to time advertise total
return on a cumulative, average, year-by-year or other basis for various
specified periods by means of quotations, charts, graphs or schedules. In
addition, each Fund may furnish total return calculations based on investments
at various sales charge levels or at NAV. Any performance information which is
based on a Fund's NAV per Share would be reduced if any applicable sales
charge were taken into account. In addition to the above, each Fund may from
time to time advertise its performance relative to certain averages,
performance rankings, indices, other information prepared by recognized mutual
fund statistical services and investments for which reliable performance
information is available.
 
  The Balanced and Growth and Income Funds compute their yield by dividing net
investment income earned during a recent 30 day period by the product of the
average daily number of Shares outstanding and entitled to receive dividends
during the period and the maximum offering price per Share on the last day of
the relevant period. The results are compounded on a bond equivalent (semi-
annual) basis and then annualized. Net investment income per Share is equal to
the dividends and interest earned during the period, reduced by accrued
expenses for the period. The calculation of net investment income for these
purposes may differ from the net investment income determined for accounting
purposes. The Balanced and Growth and Income Funds' quotations of distribution
rate are calculated by annualizing the most recent distribution of net
investment income for a monthly, quarterly or other relevant period and
dividing this amount by the NAV per Share on the last day of the period for
which the distribution rate is being calculated.
 
  Each Fund's yield, total return and distribution rate will be calculated
separately for each Class of Shares in existence. Because each Class of Shares
may be subject to different expenses, the yield, total return and distribution
rate calculations with respect to each Class of Shares for the same period
will differ. The investment performance of the Class A, Class B and Class C
Shares will be affected by the payment of a sales charge, distribution and
service fees and other Class specific expenses. See "Shares of the Trust."
 
  The Funds' performance quotations do not reflect any fees charged by an
Authorized Dealer to its customer accounts in connection with investments in
the Funds. The investment results of a Fund will fluctuate over time and any
presentation of investment results for any prior period should not be
considered a representation of what an investment may earn or what the Fund's
performance may be in any future period. In addition to information provided
in shareholder reports, the Funds may, in their discretion, from time to time,
make a list of their holdings available to investors upon request.
 
                                      55
<PAGE>
 
 
                              SHARES OF THE TRUST
 
  Each Fund is a series of Goldman Sachs Trust, which was formed under the
laws of the State of Delaware on January 28, 1997. The Funds were formerly
series of Goldman Sachs Equity Portfolios, Inc., a Maryland corporation, and
were reorganized into the Trust as of April 30, 1997. The Trustees have
authority under the Trust's Declaration of Trust to create and classify Shares
of beneficial interest in separate series, without further action by
shareholders. Additional series may be added in the future. The Trustees also
have authority to classify and reclassify any series or portfolio of Shares
into one or more Classes. Information about the Trust's other series and
Classes is contained in separate prospectuses.
 
  When issued, Shares are fully paid and non-assessable. In the event of
liquidation, shareholders of each class are entitled to share pro rata in the
net assets of the applicable Fund available for distribution to the
shareholders of such class. All Shares are freely transferable and have no
preemptive, subscription or conversion rights. Shareholders are entitled to
one vote per Share, provided that at the option of the Trustees, shareholders
will be entitled to a number of votes based upon the NAVs represented by their
Shares.
 
  As of April 3, 1998, State Street Bank and Trust Company as Trustee for
Goldman Sachs Profit Sharing Master Trust, Attention: Louis Pereira, P.O. Box
1992, Boston, MA 02105-1992 was recordholder of 59.9% of Mid Cap Equity Fund's
outstanding Shares.
 
  The Trust does not intend to hold annual meetings of shareholders. However,
recordholders may, under certain circumstances, as permitted by the Act,
communicate with other shareholders in connection with requiring a special
meeting of shareholders. The Trustees will call a special meeting of
shareholders for the purpose of electing Trustees if, at any time, less than a
majority of Trustees holding office at the time were elected by shareholders.
 
  In the interest of economy and convenience, the Trust does not issue
certificates representing the Funds' Shares. Instead, the Transfer Agent
maintains a record of each shareholder's ownership. Each shareholder receives
confirmation of purchase and redemption orders from the Transfer Agent. Fund
Shares and any dividends and distributions paid by the Funds are reflected in
account statements from the Transfer Agent.
 
 
                                   TAXATION
 
FEDERAL TAXES
 
  Each Fund is treated as a separate entity for tax purposes. Each Fund has
elected to be treated as a regulated investment company and each Fund intends
to continue to qualify for such treatment for each taxable year under
Subchapter M of the Code. To qualify as such, a Fund must satisfy certain
requirements relating to the sources of its income, diversification of its
assets and distribution of its income to shareholders. As a regulated
investment company, a Fund will not be subject to federal income or excise tax
on any net investment income and net realized capital gains that are
distributed to its shareholders in accordance with certain timing requirements
of the Code.
 
  Dividends paid by a Fund from net investment income, certain net realized
foreign exchange gains, the excess of net short-term capital gain over net
long-term capital loss and original issue discount or market discount
 
                                      56
<PAGE>
 
income will be taxable to shareholders as ordinary income. Distributions out
of the net capital gain (the excess of net long-term capital gain over net
short-term capital loss), if any, of a Fund will be taxed to shareholders as
long-term capital gains, regardless of the length of time a shareholder has
held his or her Shares or whether such gain was reflected in the price paid
for the Shares. These tax consequences will apply whether distributions are
received in cash or reinvested in Shares. A Fund's dividends that are paid to
its corporate shareholders and are attributable to qualifying dividends such
Fund receives from U.S. domestic corporations may be eligible, in the hands of
such corporate shareholders, for the corporate dividends-received deduction,
subject to certain holding period requirements and debt financing limitations
under the Code. Certain distributions paid by a Fund in January of a given
year may be taxable to shareholders as if received the prior December 31.
Shareholders will be informed annually about the amount and character of
distributions received from the Funds for federal income tax purposes.
 
  Investors should consider the tax implications of buying Shares immediately
prior to a distribution. Investors who purchase Shares shortly before the
record date for a distribution will pay a per Share price that includes the
value of the anticipated distribution and will be taxed on the distribution
even though the distribution represents a return of a portion of the purchase
price.
 
  Redemptions and exchanges of Shares are taxable events.
 
  Individuals and certain other classes of shareholders may be subject to 31%
backup withholding of federal income tax on distributions, redemptions and
exchanges if they fail to furnish their correct taxpayer identification number
and certain certifications required by the Internal Revenue Service or if they
are otherwise subject to backup withholding. Individuals, corporations and
other shareholders that are not U.S. persons under the Code are subject to
different tax rules and may be subject to nonresident alien withholding at the
rate of 30% (or a lower rate provided by an applicable tax treaty, if any) on
amounts treated as ordinary dividends from the Funds.
 
  Each Fund may be subject to foreign withholding or other foreign taxes on
income or gain from certain foreign securities. In general, the Funds do not
anticipate that they will be eligible to pass any foreign tax credits through
to their shareholders; however, the Funds may deduct these taxes in computing
their taxable income, if any.
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local
or foreign taxes on payments received from the Funds. A state income (and
possibly local income and/or intangible property) tax exemption may be
available to the extent (if any) a Fund's distributions are derived from
interest on (or, in the case of intangible property taxes, the value of its
assets is attributable to) certain U.S. Government obligations, provided in
some states that certain thresholds for holdings of such obligations and/or
reporting requirements are satisfied. For a further discussion of certain tax
consequences of investing in Shares of the Funds, see "Taxation" in the
Additional Statement. Shareholders are urged to consult their own tax advisers
regarding specific questions as to federal, state and local taxes as well as
to any foreign taxes.
 
 
                            ADDITIONAL INFORMATION
 
  As used in this Prospectus, the term "Business Day" means any day the New
York Stock Exchange is open for trading, which is Monday through Friday except
for holidays. The New York Stock Exchange is closed on the following holidays:
New Year's Day, Martin Luther King, Jr. Day, Presidents' Day (observed), Good
Friday, Memorial Day (observed), Independence Day, Labor Day, Thanksgiving Day
and Christmas Day.
 
                                      57
<PAGE>
 
 
                                   APPENDIX
 
                            STATEMENT OF INTENTION
    (APPLICABLE ONLY TO CLASS A SHARES PURCHASED SUBJECT TO A SALES CHARGE)
 
  If a shareholder anticipates purchasing $50,000 or more of Class A Shares of
a Fund alone or in combination with Class A Shares of another Fund or another
Goldman Sachs Fund within a 13-month period, the shareholder may obtain Shares
of the Fund at the same reduced sales charge as though the total quantity were
invested in one lump sum by filing this Statement of Intention incorporated by
reference in the Account Application. Income dividends and capital gain
distributions taken in additional Shares will not apply toward the completion
of this Statement of Intention.
 
  To ensure that the reduced price will be received on future purchases, the
investor must inform Goldman Sachs that this Statement of Intention is in
effect each time Shares are purchased. Subject to the conditions mentioned
below, each purchase will be made at the public offering price applicable to a
single transaction of the dollar amount specified on the Account Application.
The investor makes no commitment to purchase additional Shares, but if the
investor's purchases within 13 months plus the value of Shares credited toward
completion do not total the sum specified, the investor will pay the increased
amount of the sales charge prescribed in the Escrow Agreement.
 
                               ESCROW AGREEMENT
 
  Out of the initial purchase (or subsequent purchases if necessary), 5% of
the dollar amount specified on the Account Application shall be held in escrow
by the Transfer Agent in the form of Shares registered in the investor's name.
All income dividends and capital gains distributions on escrowed Shares will
be paid to the investor or to his or her order. When the minimum investment so
specified is completed (either prior to or by the end of the 13th month), the
investor will be notified and the escrowed Shares will be released. In signing
the Account Application, the investor irrevocably constitutes and appoints the
Transfer Agent his or her attorney to surrender for redemption any or all
escrowed Shares with full power of substitution in the premises.
 
  If the intended investment is not completed, the investor will be asked to
remit to Goldman Sachs any difference between the sales charge on the amount
specified and on the amount actually attained. If the investor does not within
20 days after written request by Goldman Sachs pay such difference in the
sales charge, the Transfer Agent will redeem an appropriate number of the
escrowed Shares in order to realize such difference. Shares remaining after
any such redemption will be released by the Transfer Agent.
 
                                      A-1
<PAGE>
 
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS ASSET
MANAGEMENT
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN SACHS FUNDS
MANAGEMENT, L.P.
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR
85 BROAD STREET
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
TRANSFER AGENT
4900 SEARS TOWER
CHICAGO, ILLINOIS 60606
 
STATE STREET BANK AND TRUST COMPANY
CUSTODIAN
1776 HERITAGE DRIVE
NORTH QUINCY, MASSACHUSETTS 02171
 
ARTHUR ANDERSEN LLP
INDEPENDENT PUBLIC ACCOUNTANTS
225 FRANKLIN STREET
BOSTON, MA 02110
 
TOLL FREE (IN U.S.) . . . . . . . . 800-526-7384
 
EQDOMPROABC
501416
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS DOMESTIC
 
EQUITY FUNDS
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
 
CLASS A, B AND C SHARES
 
 
 
LOGO
Goldman
Sachs
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
- --------------------------------------------------------------------------------
 
 
PROSPECTUS
                      GOLDMAN SACHS DOMESTIC EQUITY FUNDS
 
May 1, 1998, as revised September 1, 1998
                                 SERVICE SHARES
 
 
GOLDMAN SACHS BALANCED FUND         GOLDMAN SACHS CORE SMALL CAP EQUITY FUND
 Seeks long-term capital growth       Seeks long-term growth of capital
 and current income through in-       through a broadly diversified portfolio
 vestments in equity and fixed        of equity securities of U.S. issuers
 income securities.                   which are included in the Russell 2000
                                      Index at the time of investment.
GOLDMAN SACHS GROWTH AND INCOME
FUND                                GOLDMAN SACHS CAPITAL GROWTH FUND
 Seeks long-term growth of cap-       Seeks long-term growth of capital
 ital and growth of income            through diversified investments in eq-
 through investments in equity        uity securities of companies that are
 securities that are considered       considered to have long-term capital ap-
 to have favorable prospects          preciation potential.
 for capital appreciation
 and/or dividend paying abili-      GOLDMAN SACHS MID CAP EQUITY FUND
 ty.                                  Seeks long-term capital appreciation
                                      primarily through investments in equity
GOLDMAN SACHS CORE U.S. EQUITY        securities of companies with public
FUND                                  stock market capitalizations within the
 Seeks long-term growth of cap-       range of the market capitalization of
 ital and dividend income             companies constituting the Russell
 through a broadly diversified        Midcap Index at the time of investment
 portfolio of large cap and           (currently between $400 million and $16
 blue chip equity securities          billion).
 representing all major sectors
 of the U.S. economy.               GOLDMAN SACHS SMALL CAP VALUE FUND
                                      Seeks long-term capital growth through
GOLDMAN SACHS CORE LARGE CAP          investments in equity securities of com-
GROWTH FUND                           panies with public stock market capital-
 Seeks long-term growth of            izations of $1 billion or less at the
 capital through a broadly            time of investment.
 diversified portfolio of
 equity securities of large cap
 U.S. issuers that are expected
 to have better prospects for
 earnings growth than the
 growth rate of the general
 domestic economy. Dividend
 income is a secondary
 consideration.
 
                                 -------------
 
SERVICE SHARES OF THE FUNDS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED
OR ENDORSED BY, ANY BANK OR OTHER INSURED DEPOSITORY INSTITUTION AND ARE NOT
INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD
OR ANY OTHER GOVERNMENT AGENCY. AN INVESTMENT IN A FUND INVOLVES INVESTMENT
RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
                                                        (continued on next page)
<PAGE>
 
 
(cover continued)
 
  Goldman Sachs Asset Management ("GSAM"), New York, New York, a separate
operating division of Goldman, Sachs & Co. ("Goldman Sachs"), serves as
investment adviser to the Balanced, Growth and Income, CORE Large Cap Growth,
CORE Small Cap Equity, Mid Cap Equity and Small Cap Value (formerly "Small Cap
Equity") Funds. Goldman Sachs Funds Management, L.P. ("GSFM"), New York, New
York, an affiliate of Goldman Sachs, serves as investment adviser to the CORE
U.S. Equity (formerly the "Select Equity Fund") and Capital Growth Funds. GSAM
and GSFM are each referred to in this Prospectus as the "Investment Adviser."
Goldman Sachs serves as each Fund's distributor and transfer agent.
 
  This Prospectus provides information about Goldman Sachs Trust (the "Trust")
and the Funds that a prospective investor should understand before investing.
This Prospectus should be retained for future reference. A Statement of
Additional Information (the "Additional Statement"), dated May 1, 1998, as
revised September 1, 1998, containing further information about the Trust and
the Funds which may be of interest to investors, has been filed with the
Securities and Exchange Commission ("SEC"), is incorporated herein by reference
in its entirety, and may be obtained without charge from Service Organizations
(as defined herein), or Goldman Sachs by calling the telephone number, or
writing to one of the addresses, listed on the back cover of this Prospectus.
The SEC maintains a Web site (http://www.sec.gov) that contains the Additional
Statement and other information regarding the Trust.
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
Fund Highlights....................    3
Fees and Expenses..................    6
Financial Highlights...............    8
Investment Objectives and Policies.   16
Description of Securities..........   21
Investment Techniques..............   26
Risk Factors.......................   30
Investment Restrictions............   32
Portfolio Turnover.................   32
Management.........................   32
Expenses...........................   37
Net Asset Value....................   37
</TABLE>
<TABLE>
<CAPTION>
                               PAGE
                               ----
<S>                            <C>
Performance Information.......  38
Shares of the Trust...........  38
Taxation......................  39
Additional Information........  40
Additional Services...........  41
Reports to Shareholders.......  41
Dividends.....................  42
Purchase of Service Shares....  42
Exchange Privilege............  44
Redemption of Service Shares..  44
Appendix...................... A-1
</TABLE>
                                       2
<PAGE>
 
 
                                FUND HIGHLIGHTS
 
   The following is intended to highlight certain information and is
 qualified in its entirety by the more detailed information contained in
 this Prospectus.
 
  WHAT IS THE GOLDMAN SACHS TRUST?
 
   The Goldman Sachs Trust is an open-end management investment company
 that offers its shares ("Shares") in several investment funds (commonly
 known as mutual funds (the "Funds")). Each Fund pools the monies of
 investors by selling its Shares to the public and investing these monies
 in a portfolio of securities designed to achieve that Fund's stated
 investment objectives.
 
  WHAT ARE THE INVESTMENT OBJECTIVES AND POLICIES OF THE FUNDS?
 
   Each Fund has distinct investment objectives and policies. There can be
 no assurance that a Fund's objectives will be achieved. Each Fund is a
 "diversified open-end management company" as defined in the Investment
 Company Act of 1940, as amended (the "Act"). For a further description of
 each Fund's investment objectives and policies, see "Investment
 Objectives and Policies," "Description of Securities" and "Investment
 Techniques."
 
 
 
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION> 
                INVESTMENT
 FUND NAME      OBJECTIVES               INVESTMENT CRITERIA                BENCHMARK
- -----------    ------------            ----------------------              -----------     
<S>          <C>               <C>                                      <C>
 BALANCED    Long-term         Between 45% and 65% of total assets in   Lehman Aggregate
 FUND        capital growth    equity securities and at least 25% in    Bond Index and
             and current       fixed-income senior securities.          the Standard &
             income.                                                    Poor's Index of
                                                                        500 Common
                                                                        Stocks (the "S&P
                                                                        500 Index")
- ----------------------------------------------------------------------------------------
 GROWTH AND  Long-term growth  At least 65% of total assets in equity   S&P 500 Index
 INCOME FUND of capital and    securities that the Investment Adviser
             growth of         considers to have favorable prospects
             income.           for capital appreciation and/or
                               dividend-paying ability.
- ----------------------------------------------------------------------------------------
 CORE U.S.   Long-term growth  At least 90% of total assets in equity   S&P 500 Index
 EQUITY FUND of capital and    securities of U.S. issuers, including
             dividend income.  certain foreign issuers in the U.S. The
                               Fund seeks to achieve its objective
                               through a broadly diversified portfolio
                               of large cap and blue chip equity
                               securities representing all major
                               sectors of the U.S. economy. The Fund's
                               investments are selected using both a
                               variety of quantitative techniques and
                               fundamental research in seeking to
                               maximize the Fund's expected return,
                               while maintaining risk, style,
                               capitalization and industry
                               characteristics similar to the S&P 500
                               Index.
- ----------------------------------------------------------------------------------------
 CORE LARGE  Long-term growth  At least 90% of total assets in equity   Russell 1000
 CAP GROWTH  of capital.       securities of U.S. issuers, including    Growth Index
 FUND        Dividend income   certain foreign issuers traded in the
             is a secondary    U.S. The Fund seeks to achieve its
             consideration.    objective through a broadly diversified
                               portfolio of equity securities of large
                               cap U.S. issuers that are expected to
                               have better prospects for earnings
                               growth than the growth rate of the
                               general domestic economy. The Fund's
                               investments are selected using both a
                               variety of quantitative techniques and
                               fundamental research in seeking to
                               maximize the Fund's expected return,
                               while maintaining risk, style,
                               capitalization and industry
                               characteristics similar to the Russell
                               1000 Growth Index.
</TABLE>
 
 
                                       3
<PAGE>
 
 
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION> 
                INVESTMENT
 FUND NAME      OBJECTIVES               INVESTMENT CRITERIA                BENCHMARK
 ----------  ---------------         --------------------------           --------------                           
<S>          <C>               <C>                                      <C>
 CORE SMALL  Long-term growth  At least 90% of total assets in equity   Russell 2000
 CAP EQUITY  of capital.       securities of U.S. issuers, including    Index
 FUND                          certain foreign issuers traded in the
                               U.S. The Fund seeks to achieve its
                               investment objective through a broadly
                               diversified portfolio of equity
                               securities of U.S. issuers which are
                               included in the Russell 2000 Index at
                               the time of investment. The Fund's
                               investments are selected using both a
                               variety of quantitative techniques and
                               fundamental research in seeking to
                               maximize the Fund's expected return,
                               while maintaining risk, style,
                               capitalization and industry
                               characteristics similar to the Russell
                               2000 Index.
- --------------------------------------------------------------------------------------
 CAPITAL     Long-term         At least 90% of total assets in a        S&P 500 Index
 GROWTH FUND capital growth.   diversified portfolio of equity
                               securities. The Investment Adviser
                               considers long-term capital
                               appreciation potential in selecting
                               investments.
- --------------------------------------------------------------------------------------
 MID CAP     Long-term         At least 65% of total assets in          Russell Midcap
 EQUITY FUND capital           equity securities of companies with      Index
             appreciation.     public stock market capitalizations
                               within the range of the market
                               capitalization of companies
                               constituting the Russell Midcap Index
                               at the time of investment (currently
                               between $400 million and $16 billion)
                               ("Mid-Cap Companies").
- --------------------------------------------------------------------------------------
 SMALL CAP   Long-term         At least 65% of total assets in equity   Russell 2000
 VALUE FUND  capital growth.   securities of companies with public
                               stock market capitalizations of $1
                               billion or less at the time of
                               investment.
</TABLE>
 
- --------------------------------------------------------------------------------
 
 WHAT ARE THE RISK FACTORS AND SPECIAL CHARACTERISTICS THAT I SHOULD
 CONSIDER BEFORE INVESTING?
 
  Each Fund's Share price will fluctuate with market, economic and, to the
extent applicable, foreign exchange conditions, so that an investment in
any of the Funds may be worth more or less when redeemed than when
purchased. None of the Funds should be relied upon as a complete investment
program. There can be no assurance that a Fund's investment objectives will
be achieved. See "Risk Factors."
 
  Risks of Investing in Small Capitalization Companies. To the extent that
a Fund invests in the securities of small market capitalization companies,
the Fund may be exposed to a higher degree of risk and price volatility.
Securities of such issuers may lack sufficient market liquidity to enable a
Fund to effect sales at an advantageous time or without a substantial drop
in price.
 
  Foreign Risks. Investments in securities of foreign issuers and
currencies involve risks that are different from those associated with
investments in domestic securities. The risks associated with foreign
investments and currencies include changes in relative currency exchange
rates, political and economic developments, the imposition of exchange
controls, confiscation and other governmental restrictions. Generally,
there is less availability of data on foreign companies and securities
markets as well as less regulation of foreign stock exchanges, brokers and
issuers. A Fund's investments in emerging markets and countries ("Emerging
Countries") involves greater risks than investments in the developed
countries of Western Europe, the United States, Canada, Australia, New
Zealand and Japan.
 
  Other. A Fund's use of certain investment techniques, including
derivatives, forward contracts, options and futures, will subject the Fund
to greater risk than funds that do not employ such techniques.
 
                                       4
<PAGE>
 
 
 WHO MANAGES THE FUNDS?
 
  Goldman Sachs Asset Management serves as Investment Adviser to the Balanced,
Growth and Income, CORE Large Cap Growth, CORE Small Cap Equity, Mid Cap Equity
and Small Cap Value Funds. Goldman Sachs Funds Management, L.P. serves as
Investment Adviser to the CORE U.S. Equity and Capital Growth Funds. As of July
24, 1998, the Investment Adviser, together with its affiliates, acted as
investment adviser or distributor for assets in excess of $168 billion.
 
 WHO DISTRIBUTES THE FUNDS' SHARES?
 
  Goldman Sachs acts as distributor of each Fund's Shares (the "Distributor").
 
 WHAT IS THE MINIMUM INVESTMENT?
 
  The Funds do not have any minimum purchase or account requirements with
respect to Service Shares. A Service Organization may, however, impose a
minimum amount for initial and subsequent investments in Service Shares,
and may establish other requirements such as a minimum account balance.
 
 HOW DO I PURCHASE SERVICE SHARES?
 
  Customers of Service Organizations may invest in Service Shares only
through their Service Organizations. Service Shares of a Fund are purchased
at the current net asset value ("NAV") without any sales load. See
"Purchase of Service Shares."
 
  ADDITIONAL SERVICES. The Trust, on behalf of the Funds, has adopted a
Service Plan with respect to the Service Shares which authorizes a Fund to
compensate Service Organizations for providing account administration and
shareholder liaison services to their customers who are the beneficial
owners of such Shares. The Trust, on behalf of the Funds, will enter into
agreements with each Service Organization which will provide for
compensation to the Service Organization in an amount up to 0.50% (on an
annualized basis) of the average daily net assets of the Service Shares of
the Funds attributable to or held in the name of the Service Organization
for its customers. See "Additional Services."
 
 HOW DO I SELL MY SERVICE SHARES?
 
  You may redeem Service Shares upon request on any Business Day, as
defined under "Additional Information," at the NAV next determined after
receipt of such request in proper form. See "Redemption of Service Shares."
 
 HOW DO I RECEIVE DIVIDENDS AND DISTRIBUTIONS?
 
<TABLE>
<CAPTION>
                                       INVESTMENT INCOME DIVIDENDS CAPITAL GAINS
FUND                                        DECLARED AND PAID      DISTRIBUTIONS
- ----                                        -----------------      -------------
<S>                                    <C>                         <C>
Balanced..............................          Quarterly            Annually
Growth and Income.....................          Quarterly            Annually
CORE U.S. Equity......................           Annually            Annually
CORE Large Cap Growth.................           Annually            Annually
CORE Small Cap Equity.................           Annually            Annually
Capital Growth........................           Annually            Annually
Mid Cap Equity........................           Annually            Annually
Small Cap Value.......................           Annually            Annually
</TABLE>
 
  Recordholders of Service Shares may receive dividends and distributions
in additional Service Shares of the Fund in which they have invested or may
elect to receive them in cash. For further information concerning dividends
and distributions, see "Dividends."
 
                                       5
<PAGE>
 
 
                               FEES AND EXPENSES
                               (SERVICE SHARES)
 
<TABLE>
<CAPTION>
                                                  CORE   CORE
                                   GROWTH  CORE  LARGE  SMALL           MID   SMALL
                                    AND    U.S.   CAP    CAP   CAPITAL  CAP    CAP
                          BALANCED INCOME EQUITY GROWTH EQUITY GROWTH  EQUITY VALUE
                            FUND    FUND   FUND   FUND   FUND   FUND    FUND  FUND
                          -------- ------ ------ ------ ------ ------- ------ -----
<S>                       <C>      <C>    <C>    <C>    <C>    <C>     <C>    <C>
SHAREHOLDER TRANSACTION
EXPENSES:
 Maximum Sales Charge
  Imposed on Purchases..    None    None   None   None   None   None    None  None
 Maximum Sales Charge
  Imposed on Reinvested
  Dividends.............    None    None   None   None   None   None    None  None
 Redemption Fees........    None    None   None   None   None   None    None  None
 Exchange Fees..........    None    None   None   None   None   None    None  None
ANNUAL FUND OPERATING
 EXPENSES:
 (as a percentage of
 average daily net
 assets)/1/
 Management Fees (after
  applicable
  limitations)/2/.......    0.65%   0.70%  0.70%  0.60%  0.85%  1.00%   0.75% 1.00%
 Service Fees/3/........    0.50%   0.50%  0.50%  0.50%  0.50%  0.50%   0.50% 0.50%
 Other Expenses (after
  applicable limita-
  tions)/4/.............    0.05%   0.09%  0.04%  0.04%  0.08%  0.04%   0.14% 0.10%
                            ----    ----   ----   ----   ----   ----    ----  ----
TOTAL FUND OPERATING
 EXPENSES (AFTER FEE AND
 EXPENSE
 LIMITATIONS)/5/........    1.20%   1.29%  1.24%  1.14%  1.43%  1.54%   1.39% 1.60%
                            ====    ====   ====   ====   ====   ====    ====  ====
</TABLE>
 
- ---------------------
/1/ The Funds' annual operating expenses have been restated to reflect fees
    and expenses in effect as of September 1, 1998.
/2/ The Investment Adviser has voluntarily agreed not to impose a portion of
    the management fee on the CORE U.S. Equity and CORE Large Cap Growth Funds
    equal to 0.05% and 0.15%, respectively. Without such limitations,
    management fees would be 0.75% of each Fund's average daily net assets.
/3/ Service Organizations may charge other fees to their customers who are
    beneficial owners of Service Shares in connection with their customer
    accounts.
/4/ The Investment Adviser has voluntarily agreed to reduce or limit certain
    other expenses (excluding management fees, service fees, transfer agency
    fees (equal to 0.04% of the average daily net assets of each Fund's
    Service Shares), taxes, interest and brokerage fees and litigation,
    indemnification and other extraordinary expenses) for each Fund to the
    extent such expenses exceed the following percentages of average daily net
    assets:
<TABLE>
<CAPTION>
                                                                         OTHER
                                                                        EXPENSES
                                                                        --------
      <S>                                                               <C>
      Balanced.........................................................  0.01%
      Growth and Income................................................  0.05%
      CORE U.S. Equity.................................................  0.00%
      CORE Large Cap Growth............................................  0.00%
      CORE Small Cap Equity............................................  0.04%
      Capital Growth...................................................  0.00%
      Mid Cap Equity...................................................  0.10%
      Small Cap Value..................................................  0.06%
</TABLE>
 
/5/ Without the limitations described above, "Other Expenses" and "Total
    Operating Expenses" of the Service Shares of the Funds would be as set
    forth below:
 
<TABLE>
<CAPTION>
                                                                         TOTAL
                                                               OTHER   OPERATING
                                                              EXPENSES EXPENSES
                                                              -------- ---------
      <S>                                                     <C>      <C>
      Balanced ..............................................  0.28%     1.43%
      Growth and Income......................................  0.12%     1.32%
      CORE U.S. Equity.......................................  0.12%     1.37%
      CORE Large Cap Growth..................................  0.22%     1.47%
      CORE Small Cap Equity..................................  0.48%     1.83%
      Capital Growth.........................................  0.10%     1.60%
      Mid Cap Equity.........................................  0.16%     1.41%
      Small Cap Value........................................  0.13%     1.63%
</TABLE>
 
 
                                       6
<PAGE>
 
<TABLE>
<CAPTION>
EXAMPLE:                                       1 YEAR 3 YEARS 5 YEARS 10 YEARS
- --------                                       ------ ------- ------- --------
<S>                                            <C>    <C>     <C>     <C>
You would pay the following expenses on a hy-
 pothetical $1,000 investment, assuming (1) a
 5% annual return and (2) redemption at the
 end of each time period:
Balanced......................................  $12     $38    $ 66     $145
Growth and Income.............................   13      41      71      156
CORE U.S. Equity..............................   13      39      68      150
CORE Large Cap Growth.........................   12      36      63      139
CORE Small Cap Equity.........................   15      45      78      171
Capital Growth................................   16      49      84      183
Mid Cap Equity................................   14      44      76      167
Small Cap Value...............................   16      50      87      190
</TABLE>
 
  The Investment Adviser and Goldman Sachs may modify or discontinue any of
the limitations set forth above in the future at their discretion. The
information set forth in the foregoing table and hypothetical example relates
only to Service Shares of the Funds. Each Fund also offers Institutional
Shares and Class A, Class B and Class C Shares, which are subject to different
fees and expenses (which affect performance), have different minimum
investment requirements and are entitled to different services. Information
regarding Institutional, Class A, Class B and Class C Shares may be obtained
from an investor's sales representative or from Goldman Sachs by calling the
number on the back of this Prospectus.
 
  In addition to the compensation itemized above, certain Service
Organizations may receive other compensation in connection with the sale and
distribution of Service Shares or for services to their customers' accounts
and/or the Funds. For additional information regarding such compensation, see
"Purchase of Service Shares" in this Prospectus and the Additional Statement.
 
  The purpose of the foregoing table is to assist investors in understanding
the various fees and expenses of a Fund that an investor will bear directly or
indirectly. The information on the fees and expenses included in the table and
hypothetical example above is based on each Fund's fees and expenses (actual
or estimated) and should not be considered as representative of future
expenses. Actual fees and expenses may be greater or less than those
indicated. Moreover, while the example assumes a 5% annual return, a Fund's
actual performance will vary and may result in an actual return greater or
less than 5%. See "Management--Investment Advisers" and "Additional Services."
 
                                       7
<PAGE>
 
 
                             FINANCIAL HIGHLIGHTS
 
 
         SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD
 
  The following data have been audited by Arthur Andersen LLP, independent
public accountants, as indicated in their report incorporated by reference
into the Additional Statement from the Annual Report to shareholders of the
Funds for the year ended January 31, 1998 (the "Annual Report"). This
information should be read in conjunction with the financial statements and
related notes incorporated by reference and attached to the Additional
Statement. The Annual Report also contains performance information and is
available upon request and without charge by calling the telephone number or
writing to one of the addresses on the back cover of this Prospectus.
 
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                  INCOME FROM                        DISTRIBUTIONS TO
                           INVESTMENT OPERATIONS(E)                    SHAREHOLDERS
                           ------------------------- ------------------------------------------------
                                       NET REALIZED                                      IN EXCESS OF
                                      AND UNREALIZED                         FROM NET    NET REALIZED     NET
                 NET ASSET               GAIN ON        FROM    IN EXCESS  REALIZED GAIN   GAIN ON     INCREASE   NET ASSET
                  VALUE,      NET       INVESTMENT      NET       OF NET   ON INVESTMENT  INVESTMENT  (DECREASE)   VALUE,
                 BEGINNING INVESTMENT  AND FUTURES   INVESTMENT INVESTMENT  AND FUTURES  AND FUTURES    IN NET     END OF
                 OF PERIOD   INCOME    TRANSACTIONS    INCOME     INCOME   TRANSACTIONS  TRANSACTIONS ASSET VALUE  PERIOD
                 --------- ---------- -------------- ---------- ---------- ------------- ------------ ----------- ---------
                                                                                                             BALANCED FUND
- ---------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>        <C>        <C>           <C>          <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $18.78     $0.57        $2.66        $(0.56)    $ --        $(1.16)       $ --         $1.51     $20.29
1998--Class B
Shares..........   18.73      0.50         2.57         (0.42)    (0.02)       (1.16)         --          1.47      20.20
1998--Class C
Shares(b).......   21.10      0.25         0.24         (0.22)    (0.04)       (0.64)       (0.52)       (0.93)     20.17
1998--Institu-
tional
Shares(b).......   21.18      0.26         0.32         (0.23)    (0.08)       (0.45)       (0.71)       (0.89)     20.29
1998--Service
Shares(b).......   21.18      0.22         0.32         (0.22)    (0.06)       (0.72)       (0.44)       (0.90)     20.28
- ---------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   17.31      0.66         2.47         (0.66)      --         (1.00)         --          1.47      18.78
1997--Class B
Shares(b).......   17.46      0.42         2.34         (0.42)    (0.07)       (1.00)         --          1.27      18.73
- ---------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   14.22      0.51         3.43         (0.50)      --         (0.35)         --          3.09      17.31
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1995--Class A
Shares(b).......   14.18      0.10         0.02         (0.08)      --           --           --          0.04      14.22
<CAPTION>
                                                                                        RATIOS ASSUMING
                                                                                      NO VOLUNTARY WAIVER
                                                                                           OF FEES OR
                                                                                      EXPENSE LIMITATIONS
                                                                                    ------------------------
                                                                         RATIO OF                RATIO OF
                                                    NET      RATIO OF       NET                     NET
                                                 ASSETS AT      NET     INVESTMENT   RATIO OF   INVESTMENT
                            PORTFOLIO  AVERAGE     END OF   EXPENSES TO  INCOME TO   EXPENSES  INCOME (LOSS)
                   TOTAL    TURNOVER  COMMISSION   PERIOD   AVERAGE NET AVERAGE NET TO AVERAGE  TO AVERAGE
                 RETURN(A)   RATE(G)   RATE(F)   (IN 000'S)   ASSETS      ASSETS    NET ASSETS  NET ASSETS
                 ---------- --------- ---------- ---------- ----------- ----------- ---------- -------------
- ---------------------------------------------------------------------------------------------------------------------------
<S>              <C>        <C>       <C>        <C>        <C>         <C>         <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........   17.54%    190.43%    $.0590    $163,636     1.00%       2.94%       1.57%        2.37%
1998--Class B
Shares..........   16.71     190.43      .0590      23,639     1.76        2.14        2.07         1.83
1998--Class C
Shares(b).......    2.49(d)  190.43      .0590       8,850     1.77(c)     2.13(c)     2.08(c)      1.82(c)
1998--Institu-
tional
Shares(b).......    2.93(d)  190.43      .0590       8,367     0.76(c)     3.13(c)     1.07(c)      2.82(c)
1998--Service
Shares(b).......    2.66(d)  190.43      .0590          16     1.26(c)     2.58(c)     1.57(c)      2.27(c)
- ---------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   18.59     208.11      .0587      81,410     1.00        3.76        1.77         2.99
1997--Class B
Shares(b).......   16.22(d)  208.11      .0587       2,110     1.75(c)     2.59(c)     2.27(c)      2.07(c)
- ---------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   28.10     197.10        --       50,928     1.00        3.65        1.90         2.75
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1995--Class A
Shares(b).......    0.87(d)   14.71        --        7,510     1.00(c)     3.39(c)     8.29(c)     (3.90)(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the
    investment at the NAV at the end of the period and no sales or redemption
    charges. Total return would be reduced if a sales or redemption charge
    were taken into account.
(b) Class A and Class B Share activity commenced on October 12, 1994 and May
    1, 1996, respectively. Class C, Institutional and Service Share activity
    commenced on August 15, 1997.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a Fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
(g) Includes the effect of mortgage dollar roll transactions.
 
 
                                       8
<PAGE>
 
<TABLE>
<CAPTION>
                                INCOME (LOSS)
                               FROM INVESTMENT
                                OPERATIONS(E)                DISTRIBUTIONS TO SHAREHOLDERS
                           ------------------------ ------------------------------------------------
                                           NET                                          IN EXCESS OF
                                       REALIZED AND                         FROM NET    NET REALIZED                 NET
                 NET ASSET    NET       UNREALIZED     FROM    IN EXCESS  REALIZED GAIN   GAIN ON                 INCREASE
                  VALUE,   INVESTMENT    GAIN ON       NET       OF NET   ON INVESTMENT  INVESTMENT  ADDITIONAL  (DECREASE)
                 BEGINNING   INCOME    INVESTMENTS  INVESTMENT INVESTMENT  AND FUTURES  AND FUTURES   PAID-IN      IN NET
                 OF PERIOD   (LOSS)    AND FUTURES    INCOME     INCOME   TRANSACTIONS  TRANSACTIONS  CAPITAL    ASSET VALUE
                 --------- ----------  ------------ ---------- ---------- ------------- ------------ ----------  -----------
                                                                                            GROWTH AND INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>         <C>          <C>        <C>        <C>           <C>          <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $23.18     $0.11        $5.27       $(0.11)    $  --       $(2.52)       $  --       $ --         $2.75
1998--Class B
Shares..........   23.10      0.04         5.14          --       (0.03)      (2.45)        (0.07)       --          2.63
1998--Class C
Shares(b).......   28.20     (0.01)        0.06          --       (0.03)      (1.42)        (1.10)       --         (2.50)
1998--
Institutional
Shares..........   23.19      0.27         5.23        (0.22)       --        (0.24)        (2.28)       --          2.76
1998--Service
Shares..........   23.17      0.14         5.23        (0.06)     (0.04)      (2.52)          --         --          2.75
- ----------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   19.98      0.35         5.18        (0.35)     (0.01)      (1.97)          --         --          3.20
1997--Class B
Shares(b).......   20.82      0.17         4.31        (0.17)     (0.06)      (1.97)          --         --          2.28
1997--Institu-
tional
Shares(b).......   21.25      0.29         3.96        (0.30)     (0.04)      (1.97)          --         --          1.94
1997--Service
Shares(b).......   20.71      0.28         4.50        (0.28)     (0.07)      (1.97)          --         --          2.46
- ----------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   15.80      0.33         4.75        (0.30)       --        (0.60)          --         --          4.18
- ----------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   15.79      0.20(g)      0.30(g)     (0.20)     (0.07)      (0.33)          --        0.11(g)      0.01
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1994--Class A
Shares(b).......   14.18      0.15         1.68        (0.15)     (0.01)      (0.06)          --         --          1.61
<CAPTION>
                                                                                                     RATIOS ASSUMING
                                                                                                   NO VOLUNTARY WAIVER
                                                                                                       OF FEES OR
                                                                                                   EXPENSE LIMITATIONS
                                                                                                -------------------------
                                                                                      RATIO
                                                                                     OF NET                     RATIO
                                                              NET        RATIO     INVESTMENT                  OF NET
                 NET ASSET                                 ASSETS AT    OF NET    INCOME (LOSS)    RATIO     INVESTMENT
                  VALUE,              PORTFOLIO  AVERAGE     END OF   EXPENSES TO  TO AVERAGE   OF EXPENSES INCOME (LOSS)
                  END OF     TOTAL    TURNOVER  COMMISSION   PERIOD   AVERAGE NET      NET      TO AVERAGE   TO AVERAGE
                  PERIOD   RETURN(A)    RATE     RATE(F)   (IN 000S)    ASSETS       ASSETS     NET ASSETS   NET ASSETS
                 --------- ---------- --------- ---------- ---------- ----------- ------------- ----------- -------------
- ----------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>       <C>        <C>        <C>         <C>           <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $25.93     23.71%     61.95%    $.0590   $1,216,582    1.25%         0.43%       1.42%         0.26%
1998--Class B
Shares..........   25.73     22.87      61.95      .0590      307,815    1.94         (0.35)       1.94         (0.35)
1998--Class C
Shares(b).......   25.70      0.51(d)   61.95      .0590       31,686    1.99(c)      (0.48)(c)    1.99(c)      (0.48)(c)
1998--
Institutional
Shares..........   25.95     24.24      61.95      .0590       36.225    0.83          0.76        0.83          0.76
1998--Service
Shares..........   25.92     23.63      61.95      .0590        8,893    1.32          0.32        1.32          0.32
- ----------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   23.18     28.42      53.03      .0586      615,103    1.22          1.60        1.43%         1.39%
1997--Class B
Shares(b).......   23.10     22.23(d)   53.03      .0586       17,346    1.93(c)       0.15(c)     1.93(c)       0.15(c)
1997--Institu-
tional
Shares(b).......   23.19     20.77(d)   53.03      .0586          193    0.82(c)       1.36(c)     0.82(c)       1.36(c)
1997--Service
Shares(b).......   23.17     23.87(d)   53.03      .0586        3,174    1.32(c)       0.94(c)     1.32(c)       0.94(c)
- ----------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   19.98     32.45      57.93        --       436,757    1.20          1.67        1.45          1.42
- ----------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   15.80      3.97      71.80        --       193,772    1.25          1.28        1.58          0.95
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1994--Class A
Shares(b).......   15.79     13.08(d)  102.23        --        41,528    1.25(c)       1.23(c)     3.24(c)      (0.76)(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the
    investment at the NAV at the end of the period and no sales or redemption
    charges. Total return would be reduced if a sales or redemption charge
    were taken into account.
(b) Class A, Class B, Class C, Institutional and Service Share activity
    commenced on February 5, 1993, May 1, 1996, August 15, 1997, June 3, 1996
    and March 6, 1996, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a Fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
(g) Calculated based on the average Shares outstanding methodology.
 
 
                                       9
<PAGE>
 
<TABLE>
<CAPTION>
                                  INCOME FROM                       DISTRIBUTIONS TO
                           INVESTMENT OPERATIONS(E)                   SHAREHOLDERS
                           ------------------------- -----------------------------------------------
                                                                             FROM NET   IN EXCESS OF    NET
                                       NET REALIZED                          REALIZED   NET REALIZED INCREASE/   NET
                 NET ASSET            AND UNREALIZED            IN EXCESS    GAIN ON      GAIN ON    (DECREASE) ASSET
                  VALUE,      NET     GAIN (LOSS) ON  FROM NET    OF NET    INVESTMENT   INVESTMENT    IN NET   VALUE,
                 BEGINNING INVESTMENT  INVESTMENTS   INVESTMENT INVESTMENT AND FUTURES  AND FUTURES    ASSET    END OF   TOTAL
                 OF PERIOD   INCOME    AND FUTURES     INCOME     INCOME   TRANSACTIONS TRANSACTIONS   VALUE    PERIOD RETURN(A)
                 --------- ---------- -------------- ---------- ---------- ------------ ------------ ---------- ------ ---------
                                                                                                CORE U.S. EQUITY FUND
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>        <C>        <C>          <C>          <C>        <C>    <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $23.32     $0.11        $5.63        $(0.12)    $   --      $(2.35)      $   --      $3.27    $26.59   24.96%
1998--Class B
Shares..........   23.18      0.11         5.44            --      (0.06)      (2.00)        (.35)      3.14     26.32   24.28
1998--Class C
Shares(b).......   27.48      0.03         1.22            --      (0.14)      (0.67)       (1.68)     (1.24)    26.24    4.85(d)
1998--Institu-
tional Shares...   23.44      0.30         5.65         (0.24)      (.01)      (1.33)       (1.02)      3.35     26.79   25.76
1998--Service
Shares..........   23.27      0.19         5.57         (0.07)      (.08)      (2.35)          --       3.26     26.53   25.11
- ---------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   19.66      0.16         4.46         (0.16)        --       (0.80)          --       3.66     23.32   23.75
1997--Class B
Shares(b).......   20.44      0.04         3.70         (0.04)     (0.16)      (0.80)          --       2.74     23.18   18.59(d)
1997--Institu-
tional Shares...   19.71      0.30         4.51         (0.28)        --       (0.80)          --       3.73     23.44   24.63
1997--Service
Shares(b).......   21.02      0.13         3.15         (0.13)     (0.10)      (0.80)          --       2.25     23.27   15.92(d)
- ---------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   14.61      0.19         5.43         (0.16)        --       (0.41)          --       5.05     19.66   38.63
1996--Institu-
tional
Shares(b).......   16.97      0.16         3.23         (0.24)        --       (0.41)          --       2.74     19.71   20.14(d)
- ---------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   15.93      0.20        (0.38)        (0.20)        --       (0.94)          --      (1.32)    14.61   (1.10)
- ---------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   15.46      0.17         2.08         (0.17)        --       (1.61)          --       0.47     15.93   15.12
- ---------------------------------------------------------------------------------------------------------------------------------
1993--Class A
Shares..........   15.05      0.22         0.41         (0.22)        --          --           --       0.41     15.46    4.30
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1992--Class A
Shares(b).......   14.17      0.11         0.88         (0.11)        --          --           --       0.88     15.05    7.01(d)
<CAPTION>
                                                                          RATIOS ASSUMING
                                                                        NO VOLUNTARY WAIVER
                                                                            OF FEES OR
                                                                        EXPENSE LIMITATIONS
                                                                        ----------------------
                                                RATIO OF    RATIO OF               RATIO OF
                                                  NET         NET       RATIO OF     NET
                                         NET    EXPENSES   INVESTMENT   EXPENSES  INVESTMENT
                                      ASSETS AT    TO        INCOME        TO      INCOME
                 PORTFOLIO  AVERAGE    END OF   AVERAGE    (LOSS) TO    AVERAGE   (LOSS) TO
                 TURNOVER  COMMISSION  PERIOD     NET       AVERAGE       NET      AVERAGE
                   RATE     RATE(F)   (IN 000S)  ASSETS    NET ASSETS    ASSETS   NET ASSETS
                 --------- ---------- --------- ---------- ------------ --------- ------------
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>       <C>        <C>          <C>       <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........   65.89%    $.0651   $398,393     1.28%      0.51%       1.47%      0.32%
1998--Class B
Shares..........   65.89      .0651     59,208     1.79      (0.05)       1.96      (0.22)
1998--Class C
Shares(b).......   65.89      .0651      6,267     1.78(c)   (0.21)(c)    1.95(c)   (0.38)(c)
1998--Institu-
tional Shares...   65.89      .0651    202,893     0.65       1.16        0.82       0.99
1998--Service
Shares..........   65.89      .0651      7,841     1.15       0.62        1.32       0.45
- ---------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   37.78      .0417    225,968     1.29       0.91        1.53       0.67
1997--Class B
Shares(b).......   37.28      .0417     17,258     1.83(c)    0.06(c)     2.00(c)    0.11(c)
1997--Institu-
tional Shares...   37.28      .0417    148,942     0.65       1.52        0.85       1.32
1997--Service
Shares(b).......   37.28      .0417      3,666     1.15(c)    0.69(c)     1.35(c)    0.49(c)
- ---------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   39.35         --    129,045     1.25       1.01        1.55       0.71
1996--Institu-
tional
Shares(b).......   39.35         --     64,829     0.65(c)    1.49(c)     0.96(c)    1.18(c)
- ---------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   56.18         --     94,968     1.38       1.33        1.63       1.08
- ---------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   87.73         --     92,769     1.42       0.92        1.67       0.67
- ---------------------------------------------------------------------------------------------------------------------------------
1993--Class A
Shares..........  144.93         --    117,757     1.28       1.30        1.53       1.05
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1992--Class A
Shares(b).......  135.02         --    151,142   1.57(c)      1.24(c)     1.82(c)    0.99(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the investment
    at the NAV at the end of the period and no sales or redemption charges.
    Total return would be reduced if a sales or redemption charge were taken
    into account.
(b) Class A, Class B, Class B, Class C, Institutional and Service Share
    activity commenced on May 24, 1991, May 1, 1996, August 15, 1997, June 15,
    1995 and June 7, 1996, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a Fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
 
                                       10
<PAGE>
 
<TABLE>
<CAPTION>
                            INCOME FROM INVESTMENT
                                OPERATIONS(E)               DISTRIBUTIONS TO SHAREHOLDERS
                            ---------------------- -----------------------------------------------
                                           NET
                                        REALIZED
                                           AND                             FROM NET   IN EXCESS OF
                                       UNREALIZED                          REALIZED   NET REALIZED   NET     NET
                  NET ASSET    NET     GAIN (LOSS)            IN EXCESS    GAIN ON      GAIN ON    INCREASE ASSET
                   VALUE,   INVESTMENT     ON       FROM NET    OF NET    INVESTMENT   INVESTMENT   IN NET  VALUE,
                  BEGINNING   INCOME   INVESTMENTS INVESTMENT INVESTMENT AND FUTURES  AND FUTURES   ASSET   END OF
                  OF PERIOD   (LOSS)   AND FUTURES   INCOME     INCOME   TRANSACTIONS TRANSACTIONS  VALUE   PERIOD
                  --------- ---------- ----------- ---------- ---------- ------------ ------------ -------- ------
<S>               <C>       <C>        <C>         <C>        <C>        <C>          <C>          <C>      <C>
                                                                     CORE LARGE CAP GROWTH FUND
- ------------------------------------------------------------------------------------------------------------------
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998 -- Class A
Shares(b).......   $10.00     $ 0.01      $2.35      $(0.01)       --       $(0.32)      $(0.06)    $1.97   $11.97
1998 -- Class B
Shares(b).......    10.00      (0.03)      2.33          --        --        (0.18)       (0.20)     1.92    11.92
1998 -- Class C
Shares(b).......    11.80      (0.02)      0.54          --      (.01)       (0.38)          --      0.13    11.93
1998 -- Institu-
tional
Shares(b).......    10.00       0.01       2.35       (0.01)       --        (0.19)       (0.19)     1.97    11.97
1998 -- Service
Shares(b).......    10.00      (0.02)      2.35          --        --        (0.08)       (0.30)     1.95    11.95
<CAPTION>
                                                                                   RATIOS ASSUMING NO
                                                                                   VOLUNTARY WAIVER OF
                                                                                     FEES OR EXPENSE
                                                                                       LIMITATIONS
                                                                                   ------------------------
                                                     NET   RATIO OF
                                                   ASSETS    NET       RATIO OF    RATIO OF    RATIO OF
                                                   AT END  EXPENSES      NET       EXPENSES      NET
                                                     OF       TO      INVESTMENT      TO      INVESTMENT
                              PORTFOLIO  AVERAGE   PERIOD  AVERAGE    INCOME TO    AVERAGE     LOSS TO
                    TOTAL     TURNOVER  COMMISSION   (IN     NET       AVERAGE       NET       AVERAGE
                  RETURN(A)     RATE       RATE     000S)   ASSETS    NET ASSETS    ASSETS    NET ASSETS
                  ----------- --------- ---------- ------- ---------- ------------ ---------- -------------
<S>               <C>         <C>       <C>        <C>     <C>        <C>          <C>        <C>
- ------------------------------------------------------------------------------------------------------------------
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998 -- Class A
Shares(b).......    23.79%(d)   74.97%    $.0282   $53,786   0.91%(c)    0.12%(c)    2.40%(c)   (1.37)%(c)
1998 -- Class B
Shares(b).......    23.26(d)    74.97      .0282    13,857   1.67(c)    (0.72)(c)    2.91(c)    (1.96)(c)
1998 -- Class C
Shares(b).......     4.56(d)    74.97      .0282     4,132   1.68(c)    (0.76)(c)    2.92(c)    (2.00)(c)
1998 -- Institu-
tional
Shares(b).......    23.89(d)    74.97      .0282     4,656   0.72(c)     0.42(c)     1.96(c)    (0.82)(c)
1998 -- Service
Shares(b).......    23.56(d)    74.97      .0282       115   1.17(c)    (0.21)(c)    2.41(c)    (1.45)(c)
</TABLE>
- ------------
 (a) Assumes investment at the NAV at the beginning of the period,
     reinvestment of all dividends and distributions, a complete redemption of
     the investment at the NAV at the end of
     the period and no sales or redemption charges. Total return would be
     reduced if a sales or redemption charge were taken into account.
 (b) Class A, Class B, Institutional and Service Share activity commenced on
     May 1, 1997. Class C Share activity commenced on August 15, 1997.
 (c) Annualized.
 (d) Not annualized.
 (e) Includes the balancing effect of calculating per Share amounts.
 
 
 
                                       11
<PAGE>
 
<TABLE>
<CAPTION>
                                  INCOME FROM           DISTRIBUTIONS TO
                           INVESTMENT OPERATIONS(E)       SHAREHOLDERS
                           ------------------------- -----------------------
                                           NET
                                       REALIZED AND               FROM NET
                                        UNREALIZED                REALIZED
                 NET ASSET    NET     GAIN (LOSS) ON    FROM      GAIN ON        NET     NET ASSET
                  VALUE,   INVESTMENT INVESTMENT AND    NET      INVESTMENT   INCREASE    VALUE,               PORTFOLIO
                 BEGINNING   INCOME      FUTURES     INVESTMENT AND FUTURES    IN NET     END OF     TOTAL     TURNOVER
                 OF PERIOD   (LOSS)    TRANSACTIONS    INCOME   TRANSACTIONS ASSET VALUE  PERIOD   RETURN(A)     RATE
                 --------- ---------- -------------- ---------- ------------ ----------- --------- ---------   ---------
                                                                           CORE SMALL CAP EQUITY FUND
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>        <C>          <C>         <C>       <C>         <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......  $10.00     $(0.01)      $0.65          --        $(0.05)      $0.59     $10.59     6.37%(d)    37.65%
1998--Class B
Shares(b).......   10.00      (0.03)       0.64          --         (0.05)       0.56      10.56     6.07(d)     37.65
1998--Class C
Shares(b).......   10.00      (0.02)       0.64          --         (0.05)       0.57      10.57     6.17(d)     37.65
1998--Institu-
tional
Shares(b).......   10.00       0.01        0.65          --         (0.05)       0.61      10.61     6.57(d)     37.65
1998--Service
Shares(b).......   10.00       0.01        0.64          --         (0.05)       0.60      10.60     6.47(d)     37.65
<CAPTION>
                                                                    RATIOS ASSUMING NO
                                                                 VOLUNTARY WAIVER OF FEES
                                                                  OR EXPENSE LIMITATIONS
                                                                 ---------------------------
                                                                                  RATIO
                               NET      RATIO     RATIO OF NET                   OF NET
                            ASSETS AT   OF NET     INVESTMENT     RATIO OF     INVESTMENT
                  AVERAGE    END OF    EXPENSES   INCOME (LOSS)  EXPENSES TO  INCOME (LOSS)
                 COMMISSION  PERIOD   TO AVERAGE   TO AVERAGE    AVERAGE NET   TO AVERAGE
                    RATE    (IN 000S) NET ASSETS   NET ASSETS      ASSETS      NET ASSETS
                 ---------- --------- ----------- -------------- ------------ --------------
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>        <C>       <C>         <C>            <C>          <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......   $.0370    $11,118     1.25%(c)     (0.36)%(c)    3.92%(c)      (3.03)%(c)
1998--Class B
Shares(b).......    .0370      9,957     1.95(c)      (1.04)(c)     4.37(c)       (3.46)(c)
1998--Class C
Shares(b).......    .0370      2,557     1.95(c)      (1.07)(c)     4.37(c)       (3.49)(c)
1998--Institu-
tional
Shares(b).......    .0370      9,026     0.95(c)       0.15 (c)     3.37(c)       (2.27)(c)
1998--Service
Shares(b).......    .0370          2     1.45(c)       0.40 (c)     3.87(c)       (2.02)(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the investment
    at the NAV at the end of the period and no sales or redemption charges.
    Total return would be reduced if a sales or redemption charge were taken
    into account.
(b) Commenced operations on August 15, 1997.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
 
 
 
                                       12
<PAGE>
 
<TABLE>
<CAPTION>
                                       INCOME FROM
                                 INVESTMENT OPERATIONS(E)           DISTRIBUTIONS TO SHAREHOLDERS
                           ------------------------------------ -------------------------------------
                                                                                          IN EXCESS
                                           NET                                              OF NET
                 NET ASSET    NET      REALIZED AND             IN EXCESS    FROM NET      REALIZED   NET INCREASE
                  VALUE,   INVESTMENT   UNREALIZED    FROM NET    OF NET   REALIZED GAIN   GAIN ON     (DECREASE)  NET ASSET
                 BEGINNING   INCOME   GAIN (LOSS) ON INVESTMENT INVESTMENT ON INVESTMENT  INVESTMENT  IN NET ASSET VALUE, END
                 OF PERIOD   (LOSS)    INVESTMENTS     INCOME     INCOME   TRANSACTIONS  TRANSACTIONS    VALUE     OF PERIOD
                 --------- ---------- -------------- ---------- ---------- ------------- ------------ ------------ ----------
                                                                                                    CAPITAL GROWTH FUND
- -----------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>        <C>        <C>           <C>          <C>          <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $16.73     $0.02        $4.78        $(0.01)    $(0.01)     $(3.03)       $  --        $1.75       $18.48
1998--Class B
Shares..........   16.67      0.02         4.61           --         --        (1.20)        (1.83)       1.60        18.27
1998--Class C
Shares(b).......   19.73     (0.02)        1.60           --       (0.04)      (0.47)        (2.56)      (1.49)       18.24
1998--Institu-
tional
Shares(b).......   19.88      0.02         1.66         (0.01)     (0.07)      (0.41)        (2.62)      (1.43)       18.45
1998--Service
Shares(b).......   19.88     (0.01)        1.66           --       (0.04)      (0.76)        (2.27)      (1.42)       18.46
- -----------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   14.91      0.10         3.56         (0.10)     (0.02)      (1.72)          --         1.82        16.73
1997--Class B
Shares(b).......   15.67      0.01         2.81         (0.01)     (0.09)      (1.72)          --         1.00        16.67
- -----------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   13.67      0.12         3.93         (0.12)       --        (2.69)          --         1.24        14.91
- -----------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   15.96      0.03        (0.69)        (0.01)       --        (1.62)          --        (2.29)       13.67
- -----------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   14.64      0.02         2.40         (0.01)     (0.02)      (1.07)          --         1.32        15.96
- -----------------------------------------------------------------------------------------------------------------------------
1993--Class A
Shares..........   13.65      0.06         2.28         (0.07)       --        (1.28)          --         0.99        14.64
- -----------------------------------------------------------------------------------------------------------------------------
1992--Class A
Shares..........   11.10      0.28         2.90         (0.31)       --        (0.32)          --         2.55        13.65
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1991--Class A
Shares(b).......   11.34      0.34        (0.27)        (0.31)       --          --            --        (0.24)       11.10
<CAPTION>
                                                                                             RATIOS ASSUMING
                                                                                           NO VOLUNTARY WAIVER
                                                                                               OF FEES OR
                                                                                           EXPENSE LIMITATIONS
                                                                                        -------------------------
                                                                            RATIO OF                RATIO OF NET
                                                 NET ASSETS   RATIO OF   NET INVESTMENT  RATIO OF    INVESTMENT
                            PORTFOLIO  AVERAGE   AT END OF  NET EXPENSES INCOME (LOSS)  EXPENSES TO INCOME (LOSS)
                   TOTAL    TURNOVER  COMMISSION   PERIOD    TO AVERAGE    TO AVERAGE   AVERAGE NET    AVERAGE
                 RETURN(A)    RATE     RATE(F)   (IN 000S)   NET ASSETS    NET ASSETS     ASSETS     NET ASSETS
                 ---------- --------- ---------- ---------- ------------ -------------- ----------- -------------
- -----------------------------------------------------------------------------------------------------------------------------
<S>              <C>        <C>       <C>        <C>        <C>          <C>            <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........   29.71%     61.50%    $.0612   $1,256,595     1.40%         0.08%        1.65%        (0.17)%
1998--Class B
Shares..........   28.73      61.50      .0612       40,827     2.18         (0.77)        2.18         (0.77)
1998--Class C
Shares(b).......    8.83(d)   61.50      .0612        5,395     2.21(c)      (0.86)(c)     2.21(c)      (0.86)(c)
1998--Institu-
tional
Shares(b).......    9.31(d)   61.50      .0612        7,262     1.16(c)       0.18 (c)     1.16(c)       0.18 (c)
1998--Service
Shares(b).......    9.18(d)   61.50      .0612            2     1.50(c)      (0.16)(c)     1.50(c)      (0.16)(c)
- -----------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   25.97      52.92      .0563      920,646     1.40          0.62         1.65          0.37
1997--Class B
Shares(b).......   19.39(d)   52.92      .0563        3,221     2.15(c)      (0.39)(c)     2.15(c)      (0.39)(c)
- -----------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   30.45      63.90        --       881,056     1.36          0.65         1.61          0.40
- -----------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   (4.38)     38.36        --       862,105     1.38          0.16         1.63         (0.09)
- -----------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   16.89      36.12        --       833,682     1.38          0.13         1.63         (0.12)
- -----------------------------------------------------------------------------------------------------------------------------
1993--Class A
Shares..........   18.01      58.93        --       665,976     1.41          0.42         1.66          0.17
- -----------------------------------------------------------------------------------------------------------------------------
1992--Class A
Shares..........   29.31      48.93        --       500,307     1.53          2.09         1.78          1.84
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1991--Class A
Shares(b).......    0.84(d)   35.63        --       437,533     1.27(c)       3.24(c)      1.47(c)       3.04(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the
    investment at the NAV at the end of the period and no sales or redemption
    charges. Total return would be reduced if a sales or redemption charge
    were taken into account.
(b) Class A, Class B, Class C, Institutional and Service Share activity
    commenced on April 20, 1990, May 1, 1996, August 15, 1997, August 15, 1997
    and August 15, 1997, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a Fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
 
                                       13
<PAGE>
 
<TABLE>
<CAPTION>
                                         INCOME FROM                              DISTRIBUTIONS TO
                                   INVESTMENT OPERATIONS(E)                         SHAREHOLDERS
                           ---------------------------------------- ---------------------------------------------
                                                      NET REALIZED
                                                     AND UNREALIZED                                       NET
                                       NET REALIZED     LOSS ON                             FROM NET    INCREASE   NET
                 NET ASSET            AND UNREALIZED    FOREIGN                IN EXCESS    REALIZED   (DECREASE) ASSET
                  VALUE,      NET        GAIN ON        CURRENCY     FROM NET    OF NET     GAIN ON      IN NET   VALUE,
                 BEGINNING INVESTMENT  INVESTMENTS      RELATED     INVESTMENT INVESTMENT  INVESTMENT    ASSET    END OF
                 OF PERIOD   INCOME    AND OPTIONS    TRANSACTIONS    INCOME     INCOME   TRANSACTIONS   VALUE    PERIOD
                 --------- ---------- -------------- -------------- ---------- ---------- ------------ ---------- ------
                                                                                                    MID CAP EQUITY FUND
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>            <C>        <C>        <C>          <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares(b).......  $23.63     $0.09        $0.77          $(0.01)      $(0.06)    $(0.04)     $(2.77)     $(2.02)  $21.61
1998--Class B
Shares(b).......   23.63      0.06         0.75           (0.01)       (0.09)        --       (2.77)      (2.06)   21.57
1998--Class C
Shares(b).......   23.63      0.06         0.77           (0.01)       (0.09)        --       (2.77)      (2.04)   21.59
1998--Institu-
tional Shares...   18.73      0.16         5.70           (0.04)       (0.13)        --       (2.77)       2.92    21.65
1998--Service
Shares(b).......   23.01      0.09         1.41           (0.01)       (0.11)        --       (2.77)      (1.39)   21.62
- ------------------------------------------------------------------------------------------------------------------------
1997--Institu-
tional Shares...   15.91      0.24         3.77              --        (0.24)     (0.93)      (0.02)       2.82    18.73
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1996--Institu-
tional
Shares(b).......   15.00      0.13         0.90              --        (0.12)        --          --        0.91    15.91
<CAPTION>
                                                                                     RATIOS ASSUMING NO
                                                                                    EXPENSE LIMITATIONS
                                                                                   ------------------------
                                                     NET   RATIO OF    RATIO OF
                                                   ASSETS    NET         NET       RATIO OF     RATIO OF
                                                   AT END  EXPENSES   INVESTMENT   EXPENSES        NET
                                                     OF       TO        INCOME        TO       INVESTMENT
                             PORTFOLIO   AVERAGE   PERIOD  AVERAGE    (LOSS) TO    AVERAGE    INCOME (LOSS)
                   TOTAL     TURNOVER   COMMISSION   (IN     NET       AVERAGE       NET       TO AVERAGE
                 RETURN(A)     RATE      RATE(F)    000S)   ASSETS    NET ASSETS    ASSETS     NET ASSETS
                 ----------- ---------- ---------- ------- ---------- ------------ ---------- -------------
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>         <C>        <C>        <C>     <C>        <C>          <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares(b).......    3.42%(d)   62.60%    $0.0540   $90,588   1.35%(c)    0.33%(c)    1.47%(c)      0.21%(c)
1998--Class B
Shares(b).......    3.17(d)    62.60      0.0540    28,743   1.85(c)    (0.20)(c)    1.97(c)      (0.32)(c)
1998--Class C
Shares(b).......    3.27(d)    62.60      0.0540     6,445   1.85(c)    (0.23)(c)    1.97(c)      (0.35)(c)
1998--Institu-
tional Shares...   30.86       62.60      0.0540   236,440   0.85        0.78        0.97          0.66
1998--Service
Shares(b).......    6.30(d)    62.60      0.0540         8   1.35(c)     0.63 (c)    1.43(c)       0.51 (c)
- ------------------------------------------------------------------------------------------------------------------------
1997--Institu-
tional Shares...   25.63       74.03      0.0547   145,253   0.85        1.35        0.91          1.29
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1996--Institu-
tional
Shares(b).......    6.89(d)    58.77(d)       --   135,671   0.85(c)     1.67(c)     0.98(c)       1.54(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the investment
    at the NAV at the end of the period and no sales or redemption charges.
    Total return would be reduced if a sales or redemption charge were taken
    into account.
(b) Class A, Class B, Class C, Institutional and Service Share activity
    commenced on August 15, 1997, August 15, 1997, August 15, 1997, August 1,
    1995 and July 18, 1997, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a Fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
 
 
                                       14
<PAGE>
 
<TABLE>
<CAPTION>
                                     INCOME FROM                    DISTRIBUTIONS TO
                              INVESTMENT OPERATIONS(E)                SHAREHOLDERS
                           ------------------------------- -----------------------------------
                                          NET REALIZED                  FROM NET
                 NET ASSET    NET        AND UNREALIZED       FROM    REALIZED GAIN IN EXCESS  NET INCREASE
                  VALUE,   INVESTMENT    GAIN (LOSS) ON       NET     ON INVESTMENT   OF NET    (DECREASE)  NET ASSET
                 BEGINNING   INCOME      INVESTMENT AND    INVESTMENT AND OPTIONS   INVESTMENT IN NET ASSET VALUE, END   TOTAL
                 OF PERIOD   (LOSS)   OPTIONS TRANSACTIONS   INCOME   TRANSACTIONS    INCOME      VALUE     OF PERIOD  RETURN(A)
                 --------- ---------- -------------------- ---------- ------------- ---------- ------------ ---------- ---------
                                                                                                          SMALL CAP VALUE FUND
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>                  <C>        <C>           <C>        <C>          <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $20.91     $0.14           $5.33           $  --       $(2.33)      $  --       $ 3.14      $24.05     26.17%
1998--Class B
Shares..........   20.80     (0.01)           5.27              --        (2.33)         --         2.93       23.73     25.29
1998--Class C
Shares(b).......   24.69     (0.06)           1.43              --        (1.99)       (0.34)      (0.96)      23.73      5.51(d)
1998--Institu-
tional
Shares(b).......   24.91      0.03            1.48              --        (2.05)       (0.28)      (0.82)      24.09      6.08(d)
1998--Service
Shares(b).......   24.91     (0.01)           1.48              --        (2.02)       (0.31)      (0.86)      24.05      5.91(d)
- ---------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   17.29     (0.21)           4.92              --        (1.09)         --         3.62       20.91     27.28
1997--Class B
Shares(b).......   20.79     (0.11)           1.21              --        (1.09)         --         0.01       20.80      5.39(d)
- ---------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   16.14     (0.23)           1.39              --        (0.01)         --         1.15       17.29      7.20
- ---------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   20.67     (0.07)          (3.53)             --        (0.69)       (0.24)      (4.53)      16.14    (17.53)
- ---------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   16.68     (0.04)           5.03              --        (1.00)         --         3.99       20.67     30.13
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1993--Class A
Shares(b).......   14.18      0.03            2.50            (0.03)        --           --         2.50       16.68     17.86(d)
<CAPTION>
                                                                                   RATIOS ASSUMING NO
                                                                                    VOLUNTARY WAIVER
                                                                                        OF FEES
                                                                               --------------------------
                                                                  RATIO OF                    RATIO OF
                                      NET ASSETS   RATIO OF    NET INVESTMENT   RATIO OF   NET INVESTMENT
                 PORTFOLIO  AVERAGE   AT END OF  NET EXPENSES INCOME (LOSS) TO EXPENSES TO INCOME (LOSS)
                 TURNOVER  COMMISSION   PERIOD    TO AVERAGE    AVERAGE NET      AVERAGE   TO AVERAGE NET
                   RATE     RATE(F)   (IN 000S)   NET ASSETS       ASSETS      NET ASSETS      ASSETS
                 --------- ---------- ---------- ------------ ---------------- ----------- --------------
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>        <C>          <C>              <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........   84.81%   $0.0517    $370,246      1.54%         (0.28)%        1.76%        (0.50)%
1998--Class B
Shares..........   84.81     0.0517      42,677      2.29          (0.92)         2.29         (0.92)
1998--Class C
Shares(b).......   84.81     0.0517       5,604      2.09(c)       (0.79)(c)      2.09(c)      (0.79)(c)
1998--Institu-
tional
Shares(b).......   84.81     0.0517      14,626      1.16(c)        0.27(c)       1.16(c)       0.27(c)
1998--Service
Shares(b).......   84.81     0.0517           2      1.45(c)       (0.07)(c)      1.45(c)      (0.07)(c)
- ---------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   99.46      .0461     212,061      1.60          (0.72)         1.85         (0.97)
1997--Class B
Shares(b).......   99.46      .0461       3,674      2.35(c)       (1.63)(c)      2.35(c)      (1.63)(c)
- ---------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   57.58        --      204,994      1.41          (0.59)         1.66         (0.84)
- ---------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   43.67        --      319,487      1.53          (0.53)         1.78         (0.78)
- ---------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   56.81        --      261,074      1.60          (0.45)         1.85         (0.70)
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1993--Class A
Shares(b).......    7.12        --       59,339      1.65(c)        0.62(c)       2.70(c)      (0.43)(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the investment
    at the NAV at the end of the period and no sales or redemption charges.
    Total return would be reduced if a sales or redemption charge were taken
    into account.
(b) Class A, Class B, Class C, Institutional and Service Share activity
    commenced on October 22, 1992, May 1, 1996, August 15, 1997, August 15,
    1997 and August 15, 1997, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a Fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
 
 
                                       15
<PAGE>
 
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
 
  The investment objectives and principal investment policies of each Fund are
described below. Other investment practices and management techniques, which
involve certain risks are described under "Description of Securities," "Risk
Factors" and "Investment Techniques." There can be no assurance that a Fund's
investment objectives will be achieved.
 
  The Investment Adviser may purchase for the Funds common stocks, preferred
stocks, interests in real estate investment trusts, convertible debt
obligations, convertible preferred stocks, equity interests in trusts,
partnerships, joint ventures, limited liability companies and similar
enterprises, warrants and stock purchase rights ("equity securities"). In
choosing a Fund's securities, the Investment Adviser utilizes first-hand
fundamental research, including visiting company facilities to assess
operations and to meet decision-makers. The Investment Adviser may also use
macro analysis of numerous economic and valuation variables to anticipate
changes in company earnings and the overall investment climate. The Investment
Adviser is able to draw on the research and market expertise of the Goldman
Sachs Global Investment Research Department and other affiliates of the
Investment Adviser, as well as information provided by other securities
dealers. Equity securities in a Fund's portfolio will generally be sold when
the Investment Adviser believes that the market price fully reflects or
exceeds the securities' fundamental valuation or when other more attractive
investments are identified.
 
   Value Style Funds. The Growth and Income, Mid Cap Equity, Small Cap Value
Funds and the equity portion of the Balanced Fund are managed using a value
oriented approach. The Investment Adviser evaluates securities using
fundamental analysis and intends to purchase equity securities that are, in
its view, underpriced relative to a combination of such companies' long-term
earnings prospects, growth rate, free cash flow and/or dividend-paying
ability. Consideration will be given to the business quality of the issuer.
Factors positively affecting the Investment Adviser's view of that quality
include the competitiveness and degree of regulation in the markets in which
the company operates, the existence of a management team with a record of
success, the position of the company in the markets in which it operates, the
level of the company's financial leverage and the sustainable return on
capital invested in the business. The Funds may also purchase securities of
companies that have experienced difficulties and that, in the opinion of the
Investment Adviser, are available at attractive prices.
 
  Growth Style Funds. The Capital Growth Fund is managed using a growth equity
oriented approach. Equity securities for this Fund is selected based on their
prospects for above average growth. The Investment Adviser will select
securities of growth companies trading, in the Investment Adviser's opinion,
at a reasonable price relative to other industries, competitors and historical
price/earnings multiples. The Fund generally will invest in companies whose
earnings are believed to be in a relatively strong growth trend, or, to a
lesser extent, in companies in which significant further growth is not
anticipated but whose market value per share is thought to be undervalued. In
order to determine whether a security has favorable growth prospects, the
Investment Adviser ordinarily looks for one or more of the following
characteristics in relation to the security's prevailing price: prospects for
above average sales and earnings growth per share; high return on invested
capital; free cash flow generation; sound balance sheet, financial and
accounting policies, and overall financial strength; strong competitive
advantages; effective research, product development, and marketing; pricing
flexibility; strength of management; and general operating characteristics
that will enable the company to compete successfully in its marketplace.
 
                                      16
<PAGE>
 
  Quantitative Style Funds. The CORE U.S. Equity, CORE Large Cap Growth and
CORE Small Cap Equity Funds (the "CORE Funds") are managed using both
quantitative and fundamental techniques. CORE is an acronym for "Computer-
Optimized, Research-Enhanced," which reflects the CORE Funds' investment
process. This investment process and the proprietary multifactor model used to
implement it are discussed below.
 
  Investment Process. The Investment Adviser begins with a broad universe of
U.S. equity securities for the CORE Funds. As described more fully below, the
Investment Adviser uses a proprietary multifactor model (the "Multifactor
Model") to forecast the returns of different markets and individual
securities. In the case of an equity security followed by the Goldman Sachs
Global Investment Research Department (the "Research Department"), a rating is
assigned based upon the Research Department's evaluation. In the discretion of
the Investment Adviser, ratings may also be assigned to equity securities
based on research ratings obtained from other industry sources.
 
  In building a diversified portfolio for each CORE Fund, the Investment
Adviser utilizes optimization techniques to seek to maximize the Fund's
expected return, while maintaining a risk profile similar to the Fund's
benchmark. Each portfolio is primarily comprised of securities rated highest
by the foregoing investment process and has risk characteristics and industry
weightings similar to the relevant Fund's benchmark.
 
  Multifactor Model. The Multifactor Model is a rigorous computerized rating
system for forecasting the returns of different equity markets and individual
equity securities according to fundamental investment characteristics. The
CORE Funds use the Multifactor Model to forecast the returns of securities
held in each Fund's portfolio. The Multifactor Model incorporates common
variables covering measures of value, growth, momentum and risk (e.g.,
book/price ratio, earnings/price ratio, price momentum, price volatility,
consensus growth forecasts, earnings estimate revisions and earnings
stability). All of the factors used in the Multifactor Model have been shown
to significantly impact the performance of the securities and markets they
were designed to forecast.
 
  The weightings assigned to the factors in the Multifactor Model used by the
CORE Funds are derived using a statistical formulation that considers each
factor's historical performance in different market environments. As such, the
Multifactor Model is designed to evaluate each security using only the factors
that are statistically related to returns in the anticipated market
environment. Because it includes many disparate factors, the Investment
Adviser believes that the Multifactor Model is broader in scope and provides a
more thorough evaluation than most conventional, quantitative models.
Securities and markets ranked highest by the Multifactor Model do not have one
dominant investment characteristic; rather, they possess an attractive
combination of investment characteristics.
 
  Research Department. In assigning ratings to equity securities, the Research
Department uses a four category rating system ranging from "recommended for
purchase" to "likely to underperform." The ratings reflect the analyst's
judgment as to the investment results of a specific security and incorporate
economic outlook, valuation, risk and a variety of other factors.
 
  By employing both a quantitative (i.e., the Multifactor Model) and a
qualitative (i.e., research enhanced) method of selecting securities, the CORE
Funds seek to capitalize on the strengths of each discipline.
 
                                      17
<PAGE>
 
 BALANCED FUND
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital growth and current income. The Fund seeks capital
appreciation primarily through the equity component of its portfolio while
investing in fixed income securities primarily to provide income for regular
quarterly dividends.
 
  Primary Investment Focus. The Fund invests, under normal circumstances,
between 45% and 65% of its total assets in equity securities. The Fund also
invests at least 25% of its total assets in fixed-income senior securities and
the remainder of its assets in other fixed income securities and cash. The
percentage of the portfolio invested in equity and fixed-income securities
will vary from time to time as the Investment Adviser evaluates their relative
attractiveness based on market valuations, economic growth and inflation
prospects. This allocation is subject to the Fund's intention to pay regular
quarterly dividends. The amount of quarterly dividends can also be expected to
fluctuate in accordance with factors such as prevailing interest rates and the
percentage of the Fund's assets invested in fixed-income securities.
 
  Other. Although the Fund's equity investments consist primarily of publicly
traded U.S. securities, the Fund may invest up to 10% of its total assets in
the equity securities of foreign issuers, including issuers in Emerging
Countries and equity securities quoted in foreign currencies. A portion of the
Fund's portfolio of equity securities may be selected primarily to provide
current income. Equity securities selected to provide current income may
include interests in real estate investment trusts, convertible securities,
preferred stocks, utility stocks and interests in limited partnerships.
 
  The Fund's fixed-income securities primarily include securities issued by
the U.S. Government, its agencies, instrumentalities or sponsored enterprises,
corporations or other entities, mortgage-backed and asset-backed securities,
municipal securities and custodial receipts. The Fund may also invest in debt
obligations (U.S. dollar and non-U.S. dollar denominated) issued or guaranteed
by one or more foreign governments or any of their political subdivisions,
agencies or instrumentalities and foreign corporations or other entities. Such
securities are collectively referred to herein as "fixed-income securities."
The Fund's investments in fixed-income securities that are issued by foreign
issuers, including issuers in Emerging Countries, may not exceed 10% of the
Fund's total assets. The Fund may employ certain currency techniques to seek
to hedge against currency exchange rate fluctuations or to seek to increase
total return. When used to seek to enhance return, these management techniques
are considered speculative. Such currency management techniques involve risks
different from those associated with investing solely in securities of U.S.
issuers quoted in U.S. dollars. See "Description of Securities," "Investment
Techniques" and "Risk Factors."
 
 GROWTH AND INCOME FUND
 
 
  Objectives. The Fund's investment objectives are to provide investors with
long-term growth of capital and growth of income.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 65% of its total assets in equity securities that the Investment Adviser
considers to have favorable prospects for capital appreciation and/or
dividend-paying ability.
 
  Other. The Fund may invest up to 35% of its total assets in fixed-income
securities that, in the opinion of the Investment Adviser, offer the potential
to further the Fund's investment objectives. In addition, although the Fund
will invest primarily in publicly traded U.S. securities, it may invest up to
25% of its total assets in foreign securities, including securities of issuers
in Emerging Countries and securities quoted in foreign currencies.
 
                                      18
<PAGE>
 
 CORE U.S. EQUITY FUND (FORMERLY, THE "SELECT EQUITY FUND")
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital and dividend income. The Fund seeks to achieve its
objective through a broadly diversified portfolio of large cap and blue chip
equity securities representing all major sectors of the U.S. economy.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities of U.S. issuers, including
certain foreign issuers that are traded in the United States. The Fund's
investments are selected using both a variety of quantitative techniques and
fundamental research in seeking to maximize the Fund's expected return, while
maintaining risk, style, capitalization and industry characteristics similar
to the S&P 500 Index. The Fund seeks a broad representation in most major
sectors of the U.S. economy and a portfolio comprised of companies with
average long-term earnings growth expectations and dividend yields. The Fund
may invest only in fixed-income securities that are considered cash
equivalents.
 
  For a description of the investment process of the Fund, see "Investment
Objectives and Policies--Quantitative Style Funds."
 
 CORE LARGE CAP GROWTH FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital. The Fund seeks to achieve its objective through a
broadly diversified portfolio of equity securities of large cap U.S. issuers
that are expected to have better prospects for earnings growth than the growth
rate of the general domestic economy. Dividend income is a secondary
consideration.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities of U.S. issuers, including
certain foreign issuers that are traded in the United States. The Investment
Adviser emphasizes a company's growth prospects in analyzing equity securities
to be purchased by the Fund. The Fund's investments are selected using both a
variety of quantitative techniques and fundamental research in seeking to
maximize the Fund's expected return, while maintaining risk, style,
capitalization and industry characteristics similar to the Russell 1000 Growth
Index. The Fund seeks a portfolio comprised of companies with above average
capitalizations and earnings growth expectations and below average dividend
yields. The Fund may invest only in fixed-income securities that are
considered cash equivalents.
 
  For a description of the investment process of the Fund, see "Investment
Objectives and Policies--Quantitative Style Funds."
 
 CORE SMALL CAP EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital. The Fund seeks to achieve its objective through a
broadly diversified portfolio of equity securities of U.S. issuers which are
included in the Russell 2000 Index at the time of investment.
 
   Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities of U.S. issuers, including
certain foreign issuers that are traded in the United States. The Fund's
investments are selected using both a variety of quantitative techniques and
fundamental research in seeking to maximize the Fund's expected return, while
maintaining risk, style, capitalization and industry
 
                                      19
<PAGE>
 
characteristics similar to the Russell 2000 Index. The Fund seeks a portfolio
comprised of companies with small market capitalizations, strong expected
earnings growth and momentum, and better valuation and risk characteristics
than the Russell 2000 Index. The Fund may invest only in fixed-income
securities that are considered cash equivalents.
 
  The Investment Adviser believes that companies in which the Fund may invest
offer greater opportunity for growth of capital than larger, more mature,
better known companies. Investments in small market capitalization issuers
involve special risks. See "Description of Securities" and "Risk Factors." If
the issuer of a portfolio security held by the Fund is no longer included in
the Russell 2000 Index, the Fund may, but is not required to, sell the
security.
 
  For a description of the investment process of the Fund, see "Investment
Objectives and Policies--Quantitative Style Funds."
 
 CAPITAL GROWTH FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities. The Fund seeks to achieve
its investment objective by investing in a diversified portfolio of equity
securities that are considered by the Investment Adviser to have long-term
capital appreciation potential.
 
  Other. Although the Fund will invest primarily in publicly traded U.S.
securities, it may invest up to 10% of its total assets in foreign securities,
including securities of issuers in Emerging Countries and securities quoted in
foreign currencies.
 
 MID CAP EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal circumstances,
substantially all of its assets in equity securities and at least 65% of its
total assets in equity securities of Mid-Cap Companies with public stock
market capitalizations (based upon shares available for trading on an
unrestricted basis) within the range of the market capitalization of companies
constituting the Russell Midcap Index at the time of investment (currently
between $400 million and $16 billion). If the capitalization of an issuer
increases above $16 billion after purchase of such issuer's securities, the
Fund may, but is not required to, sell the securities. Dividend income, if
any, is an incidental consideration.
 
  Other. The Fund may invest up to 35% of its total assets in fixed-income
securities. In addition, although the Fund will invest primarily in publicly
traded U.S. securities, it may invest up to 25% of its total assets in foreign
securities, including securities of issuers in Emerging Countries and
securities quoted in foreign currencies.
 
 SMALL CAP VALUE FUND (FORMERLY, THE "SMALL CAP EQUITY FUND")
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital growth.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 65% of its total assets in equity securities of companies with public
stock market capitalizations of $1 billion or less at the time of
 
                                      20
<PAGE>
 
investment. Under normal circumstances, the Fund's investment horizon for
ownership of stocks will be two to three years. Dividend income, if any, is an
incidental consideration. If the market capitalization of a company held by
the Fund increases above the amount stated above, the Fund may, consistent
with its investment objective, continue to hold the security.
 
  Small Capitalization Companies. The Fund invests in companies which the
Investment Adviser believes are well managed niche businesses that have the
potential to achieve high or improving returns on capital and/or above average
sustainable growth. The Fund may invest in securities of small market
capitalization companies which may have experienced financial difficulties.
Investments may also be made in companies that are in the early stages of
their life and that the Investment Adviser believes have significant growth
potential. The Investment Adviser believes that the companies in which the
Fund may invest offer greater opportunity for growth of capital than larger,
more mature, better known companies. However, investments in such small market
capitalization companies involve special risks. See "Description of
Securities" and "Risk Factors."
 
  Other. The Fund may invest in the aggregate up to 35% of its total assets in
the equity securities of companies with public stock market capitalizations in
excess of $1 billion at the time of investment and in fixed- income
securities. In addition, although the Fund will invest primarily in publicly
traded U.S. securities, it may invest up to 25% of its total assets in foreign
securities, including securities of issuers in Emerging Countries and
securities quoted in foreign currencies.
 
 
                           DESCRIPTION OF SECURITIES
 
 
  The Funds may invest in equity and fixed income securities in accordance
with the investment policies stated above. Certain of these permitted
investments are described in more detail in this section.
 
CONVERTIBLE SECURITIES
 
  Each Fund may invest in convertible securities, including debt obligations
and preferred stock of the issuer convertible at a stated exchange rate into
common stock of the issuer. Convertible securities generally offer lower
interest or dividend yields than non-convertible securities of similar
quality. As with all fixed-income securities, the market value of convertible
securities tends to decline as interest rates increase and, conversely, to
increase as interest rates decline. However, when the market price of the
common stock underlying a convertible security exceeds the conversion price,
the convertible security tends to reflect the market price of the underlying
common stock. As the market price of the underlying common stock declines, the
convertible security tends to trade increasingly on a yield basis, and thus
may not decline in price to the same extent as the underlying common stock.
Convertible securities rank senior to common stocks in an issuer's capital
structure and consequently entail less risk than the issuer's common stock. In
evaluating a convertible security, the Investment Adviser will give primary
emphasis to the attractiveness of the underlying common stock. The convertible
debt securities in which the Balanced Fund invests will be rated, at the time
of investment, B or better by Standard & Poor's Ratings Group ("Standard &
Poor's") or Moody's Investors Service, Inc. ("Moody's"), or if unrated by such
rating organizations, determined to be of comparable quality by the Investment
Adviser. The convertible securities in which the CORE Funds invest are not
subject to any minimum rating criteria. The convertible debt securities in
which the other Funds may invest are subject to the same rating criteria as a
Fund's investments in non-convertible debt securities. Convertible debt
securities are equity investments for purposes of each Fund's investment
policies.
 
                                      21
<PAGE>
 
FOREIGN INVESTMENTS
 
  FOREIGN SECURITIES. Each Fund may invest in the securities of foreign
issuers (provided that the CORE U.S. Equity, CORE Large Cap Growth and CORE
Small Cap Equity Funds may only invest in equity securities of foreign issuers
that are traded in the U.S.). Investments in foreign securities may offer
potential benefits that are not available from investments exclusively in
equity securities of domestic issuers quoted in U.S. dollars. Foreign
countries may have economic policies or business cycles different from those
of the U.S. and markets for foreign securities do not necessarily move in a
manner parallel to U.S. markets.
 
  Investing in the securities of foreign issuers involves certain special
risks, including those set forth below, which are not typically associated
with investing in U.S. dollar denominated or quoted securities of U.S.
issuers. Such investments may be affected by changes in currency rates,
changes in foreign or U.S. laws or restrictions applicable to such investments
and in exchange control regulations (e.g., currency blockage). A decline in
the exchange rate of the currency (i.e., weakening of the currency against the
U.S. dollar) in which a portfolio security is quoted or denominated relative
to the U.S. dollar would reduce the value of the portfolio security. In
addition, if the currency in which a Fund receives dividends, interest or
other payments declines in value against the U.S. dollar before such income is
distributed as dividends to shareholders or converted to U.S. dollars, the
Fund may have to sell portfolio securities to obtain sufficient cash to pay
such dividends. The expected introduction of a single currency, the euro, on
January 1, 1999 for participating European nations in the Economic and
Monetary Union ("EU") presents unique uncertainties, including whether the
payment and operational systems of banks and other financial institutions will
be ready by the scheduled launch date; the creation of suitable clearing and
settlement payment systems for the new currency; the legal treatment of
certain outstanding financial contracts after January 1, 1999 that refer to
existing currencies rather than the euro; the establishment and maintenance of
exchange rates for currencies being converted into the euro and the euro; the
fluctuation of the euro relative to non-euro currencies during the transition
period from January 1, 1999 to December 31, 2000 and beyond; whether the
interest rate, tax and labor regimes of European countries participating in
the euro will converge over time; and whether the conversion of the currencies
of other EU countries such as the United Kingdom, Denmark and Greece into the
euro and the admission of other non-EU countries such as Poland, Latvia and
Lithuania as members of the EU may have an impact on the euro. These or other
factors, including political and economic risks, could cause market
disruptions before or after the introduction of the euro, and could adversely
affect the value of securities and foreign currencies held by the Funds.
Commissions on transactions in foreign securities may be higher than those for
similar transactions on domestic stock markets. In addition, clearance and
settlement procedures may be different in foreign countries and, in certain
markets, such procedures have been unable to keep pace with the volume of
securities transactions, thus making it difficult to conduct such
transactions.
 
  Foreign issuers are not generally subject to uniform accounting, auditing
and financial reporting standards comparable to those applicable to U.S.
issuers. There may be less publicly available information about a foreign
issuer than about a U.S. issuer. In addition, there is generally less
government regulation of foreign markets, companies and securities dealers
than in the United States. Foreign securities markets may have substantially
less volume than U.S. securities markets and securities of many foreign
issuers are less liquid and more volatile than securities of comparable
domestic issuers. Furthermore, with respect to certain foreign countries,
there is a possibility of nationalization, expropriation or confiscatory
taxation, imposition of withholding or other taxes on dividend or interest
payments (or, in some cases, capital gains), limitations on the removal of
funds or other assets of the Funds, political or social instability or
diplomatic developments which could affect investments in those countries.
 
  INVESTMENTS IN ADRS, EDRS AND GDRS. Each Fund may invest in foreign
securities which take the form of sponsored and unsponsored American
Depository Receipts ("ADRs") and Global Depository Receipts
 
                                      22
<PAGE>
 
("GDRs") and each Fund, other than the CORE Funds, may also invest in European
Depository Receipts ("EDRs") or other similar instruments representing
securities of foreign issuers (together, "Depository Receipts"). ADRs
represent the right to receive securities of foreign issuers deposited in a
domestic bank or a correspondent bank. Prices of ADRs are quoted in U.S.
dollars, and ADRs are traded in the United States on exchanges or over-the-
counter and are sponsored and issued by domestic banks. EDRs and GDRs are
receipts evidencing an arrangement with a non-U.S. bank. EDRs and GDRs are not
necessarily quoted in the same currency as the underlying security. To the
extent a Fund acquires Depository Receipts through banks which do not have a
contractual relationship with the foreign issuer of the security underlying
the Depository Receipts to issue and service such Depository Receipts
(unsponsored Depository Receipts), there may be an increased possibility that
the Fund would not become aware of and be able to respond to corporate
actions, such as stock splits or rights offerings involving the foreign
issuer, in a timely manner. In addition, the lack of information may result in
inefficiencies in the valuation of such instruments. Investment in Depository
Receipts does not eliminate all the risks inherent in investing in securities
of non-U.S. issuers. The market value of Depository Receipts is dependent upon
the market value of the underlying securities and fluctuations in the relative
value of the currencies in which the Depository Receipt and the underlying
securities are quoted. However, by investing in Depository Receipts, such as
ADRs, that are quoted in U.S. dollars, a Fund may avoid currency risks during
the settlement period for purchases and sales.
 
  FOREIGN CURRENCY TRANSACTIONS. Because investment in foreign issuers will
usually involve currencies of foreign countries, and because the Balanced Fund
may have currency exposure independent of its securities positions, the value
of the assets of a Fund as measured in U.S. dollars will be affected by
changes in foreign currency exchange rates. A Fund may, to the extent it
invests in foreign securities, purchase or sell foreign currencies on a spot
basis and may also purchase or sell forward foreign currency exchange
contracts for hedging purposes and to seek to protect against anticipated
changes in future foreign currency exchange rates. In addition, the Balanced
Fund may enter into such contracts to seek to increase total return when the
Investment Adviser anticipates that the foreign currency will appreciate or
depreciate in value, but securities denominated or quoted in that currency do
not present attractive investment opportunities and are not held in the Fund's
portfolio. When entered into to seek to enhance return, forward foreign
currency exchange contracts are considered speculative. The Balanced Fund may
also engage in cross-hedging by using forward contracts in a currency
different from that in which the hedged security is denominated or quoted if
the Investment Adviser determines that there is a pattern of correlation
between the two currencies. If a Fund enters into a forward foreign currency
exchange contract to buy foreign currency for any purpose or the Balanced Fund
enter into forward foreign currency exchange contracts to sell foreign
currency to seek to increase total return, the Fund will segregate cash or
liquid assets in an amount equal to the value of the Fund's total assets
committed to the consummation of the forward contract, or otherwise cover its
position in a manner permitted by the SEC. The Fund will incur costs in
connection with conversions between various currencies. A Fund may hold
foreign currency received in connection with investments in foreign securities
when, in the judgment of the Investment Adviser, it would be beneficial to
convert such currency into U.S. dollars at a later date, based on anticipated
changes in the relevant exchange rate.
 
  Currency exchange rates may fluctuate significantly over short periods of
time causing, along with other factors, a Fund's NAV to fluctuate. Currency
exchange rates generally are determined by the forces of supply and demand in
the foreign exchange markets and the relative merits of investments in
different countries, actual or anticipated changes in interest rates and other
complex factors, as seen from an international perspective. Currency exchange
rates also can be affected unpredictably by the intervention of U.S. or
foreign governments or central banks, or the failure to intervene, or by
currency controls or political developments in the U.S. or abroad. To the
extent that a substantial portion of a Fund's total assets, adjusted to
reflect the Fund's net
 
                                      23
<PAGE>
 
position after giving effect to currency transactions, is denominated or
quoted in the currencies of foreign countries, the Fund will be more
susceptible to the risk of adverse economic and political developments within
those countries.
 
  The market in forward foreign currency exchange contracts, currency swaps
and other privately negotiated currency instruments offers less protection
against defaults by the other party to such instruments than is available for
currency instruments traded on an exchange. Such contracts are subject to the
risk that the counterparty to the contract will default on its obligations.
Since these contracts are not guaranteed by an exchange or clearinghouse, a
default on the contract would deprive the Fund of unrealized profits,
transaction costs or the benefits of a currency hedge or force the Fund to
cover its purchase or sale commitments, if any, at the current market price. A
Fund will not enter into forward foreign currency exchange contracts, currency
swaps or other privately negotiated currency instruments unless the credit
quality of the unsecured senior debt or the claims-paying ability of the
counterparty is considered to be investment grade by the Investment Adviser.
 
  The Balanced Fund may also engage in a variety of foreign currency
management techniques. For a discussion of such instruments and the risks
associated with their use, see "Investment Objective and Policies" in the
Additional Statement.
 
FIXED-INCOME SECURITIES
 
  U.S. GOVERNMENT SECURITIES. Each Fund may invest in U.S. Government
securities. Generally, these securities include U.S. Treasury obligations and
obligations issued or guaranteed by U.S. Government agencies,
instrumentalities or sponsored enterprises. U.S. Government securities also
include Treasury receipts and other stripped U.S. Government securities, where
the interest and principal components of stripped U.S. Government securities
are traded independently. A Fund may also invest in zero coupon U.S. Treasury
securities and in zero coupon securities issued by financial institutions,
which represent a proportionate interest in underlying U.S. Treasury
securities. A zero coupon security pays no interest to its holder during its
life and its value consists of the difference between its face value at
maturity and its cost. The market prices of zero coupon securities generally
are more volatile than the market prices of securities that pay interest
periodically. See "Taxation" in the Additional Statement.
 
  FOREIGN GOVERNMENT SECURITIES. The Balanced Fund may invest in debt
obligations of foreign governments and governmental agencies, including those
of Emerging Countries. Investment in sovereign debt obligations involves
special risks not present in debt obligations of corporate issuers. The issuer
of the debt or the governmental authorities that control the repayment of the
debt may be unable or unwilling to repay principal or interest when due in
accordance with the terms of such debt, and the Fund may have limited recourse
in the event of a default. Periods of economic uncertainty may result in the
volatility of market prices of sovereign debt, and in turn the Fund's NAV, to
a greater extent than the volatility inherent in debt obligations of U.S.
issuers. A sovereign debtor's willingness or ability to repay principal and
pay interest in a timely manner may be affected by, among other factors, its
cash flow situation, the extent of its foreign currency reserves, the
availability of sufficient foreign exchange on the date a payment is due, the
relative size of the debt service burden to the economy as a whole, the
sovereign debtor's policy toward international lenders and the political
constraints to which a sovereign debtor may be subject.
 
  MORTGAGE-BACKED AND ASSET-BACKED SECURITIES. Each Fund (other than the CORE
Funds) may invest in mortgage-backed securities ("Mortgage-Backed
Securities"), which represent direct or indirect participations in, or are
collateralized by and payable from, mortgage loans secured by real property.
Each Fund (other than the CORE Funds) may also invest in asset-backed
securities ("Asset-Backed Securities"). The principal and interest payments on
Asset-Backed Securities are collateralized by pools of assets such as auto
loans, credit card receivables, leases, installment contracts and personal
property. Such asset pools are securitized through the use
 
                                      24
<PAGE>
 
of special purpose trusts or corporations. Principal and interest payments may
be credit enhanced by a letter of credit, a pool insurance policy or a
senior/subordinated structure.
 
  The Balanced Fund may also invest in stripped Mortgage-Backed Securities
("SMBS") (including interest only and principal only securities), which are
derivative multiple class Mortgage-Backed Securities. SMBS are usually
structured with two different classes: one that receives 100% of the interest
payments and the other that receives 100% of the principal payments from a
pool of mortgage loans. If the underlying mortgage loans experience different
than anticipated prepayments of principal, the Fund may fail to recoup fully
its initial investment in these securities. The market value of the class
consisting entirely of principal payments generally is unusually volatile in
response to changes in interest rates. The yields on a class of SMBS that
receives all or most of the interest from mortgage loans are generally higher
than prevailing market yields on other Mortgage-Backed Securities because
their cash flow patterns are more volatile and there is a greater risk that
the initial investment will not be fully recouped. The Fund's investments in
SMBS may require the Fund to sell portfolio securities to generate sufficient
cash to satisfy certain income distribution requirements.
 
  CORPORATE DEBT OBLIGATIONS. Each Fund may invest in corporate debt
obligations. Corporate debt obligations are subject to the risk of an issuer's
inability to meet principal and interest payments on the obligations.
 
  BANK OBLIGATIONS. Each Fund may invest in obligations issued or guaranteed
by U.S. or foreign banks. Bank obligations, including without limitations,
time deposits, bankers' acceptances and certificates of deposit, may be
general obligations of the parent bank or may be limited to the issuing branch
by the terms of the specific obligations or by government regulation. Banks
are subject to extensive but different governmental regulations which may
limit both the amount and types of loans which may be made and interest rates
which may be charged. In addition, the profitability of the banking industry
is largely dependent upon the availability and cost of funds for the purpose
of financing lending operations under prevailing money market conditions.
General economic conditions as well as exposure to credit losses arising from
possible financial difficulties of borrowers play an important part in the
operation of this industry.
 
  STRUCTURED SECURITIES. Each Fund may invest in structured securities. The
value of the principal of and/or interest on such securities is determined by
reference to changes in the value of specific currencies, interest rates,
commodities, indices or other financial indicators (the "Reference") or the
relative change in two or more References. The interest rate or the principal
amount payable upon maturity or redemption may be increased or decreased
depending upon changes in the applicable Reference. The terms of the
structured securities may provide that in certain circumstances no principal
is due at maturity and, therefore, result in the loss of a Fund's investment.
Structured securities may be positively or negatively indexed, so that
appreciation of the Reference may produce an increase or decrease in the
interest rate or value of the security at maturity. In addition, changes in
the interest rates or the value of the security at maturity may be a multiple
of changes in the value of the Reference. Consequently, structured securities
may entail a greater degree of market risk than other types of fixed-income
securities. Structured securities may also be more volatile, less liquid and
more difficult to price accurately than less complex securities.
 
  RATING CRITERIA. Except as noted below, each Fund (other than the CORE
Funds, which only invest in debt instruments that are cash equivalents) may
invest in debt securities rated at least investment grade at the time of
investment. Investment grade debt securities are securities rated BBB or
higher by Standard & Poor's or Baa or higher by Moody's. A security will be
deemed to have met a rating requirement if it receives the minimum required
rating from at least one such rating organization even though it has been
rated below the minimum rating by one or more other rating organizations, or
if unrated by such rating organizations, determined by the Investment Adviser
to be of comparable credit quality. The Balanced Fund may invest up to 10% of
its total assets on debt securities that are rated BB or B by Standard &
Poor's or Ba or B by Moody's. The Growth
 
                                      25
<PAGE>
 
and Income, Capital Growth and Small Cap Value Funds may invest up to 10%, 10%
and 35%, respectively, of their total assets in debt securities which are
unrated or rated in the lowest rating categories by Standard & Poor's or
Moody's (i.e., BB or lower by Standard & Poor's or Ba or lower by Moody's),
including securities rated D by Moody's or Standard & Poor's. Mid Cap Equity
Fund may invest up to 10% of its total assets in below investment grade debt
securities rated B or higher by Standard & Poor's or B or higher by Moody's.
Fixed-income securities rated BBB or Baa are considered medium-grade
obligations with speculative characteristics, and adverse economic conditions
or changing circumstances may weaken their issuers' capacity to pay interest
and repay principal. Fixed-income securities rated BB or Ba or below (or
comparable unrated securities) are commonly referred to as "junk bonds," are
considered predominately speculative and may be questionable as to principal
and interest payments. In some cases, such bonds may be highly speculative,
have poor prospects for reaching investment grade standing and be in default.
As a result, investment in such bonds will entail greater speculative risks
than those associated with investment in investment grade bonds. Also, to the
extent that the rating assigned to a security in a Fund's portfolio is
downgraded by a rating organization, the market price and liquidity of such
security may be adversely affected. See Appendix A to the Additional Statement
for a description of the corporate bond ratings assigned by Standard & Poor's
and Moody's.
 
REAL ESTATE INVESTMENT TRUSTS ("REITS")
 
  Each Fund may invest in REITs, which are pooled investment vehicles that
invest primarily in either real estate or real estate related loans. The value
of a REIT is affected by changes in the value of the properties owned by the
REIT or securing mortgage loans held by the REIT. REITs are dependent upon
cash flow from their investments to repay financing costs and the ability of
the REITs' manager. REITs are also subject to risks generally associated with
investments in real estate. A Fund will indirectly bear its proportionate
share of any expenses, including management fees, paid by a REIT in which it
invests.
 
 
                             INVESTMENT TECHNIQUES
 
 
OPTIONS ON SECURITIES AND SECURITIES INDICES
 
  Each Fund (other than the CORE U.S. Equity and CORE Large Cap Growth Funds)
may write (sell) covered call and put options and purchase call and put
options on any securities in which it may invest or on any securities index
composed of securities in which it may invest. The writing and purchase of
options is a highly specialized activity which involves investment techniques
and risks different from those associated with ordinary portfolio securities
transactions. The use of options to seek to increase total return involves the
risk of loss if the Investment Adviser is incorrect in its expectation of
fluctuations in securities prices or interest rates. The successful use of
options for hedging purposes also depends in part on the ability of the
Investment Adviser to manage future price fluctuations and the degree of
correlation between the options and securities markets. If the Investment
Adviser is incorrect in its expectation of changes in securities prices or
determination of the correlation between the securities indices on which
options are written and purchased and the securities in a Fund's investment
portfolio, the investment performance of the Fund will be less favorable than
it would have been in the absence of such options transactions. The writing of
options could significantly increase a Fund's portfolio turnover rate and,
therefore, associated brokerage commissions or spreads.
 
OPTIONS ON FOREIGN CURRENCIES
 
  A Fund may, to the extent it invests in foreign securities, purchase and
sell (write) call and put options on foreign currencies for the purpose of
protecting against declines in the U.S. dollar value of foreign portfolio
securities and anticipated dividends on such securities and against increases
in the U.S. dollar cost of foreign securities to be acquired. In addition, the
Balanced Fund may use options on currency to cross-hedge, which
 
                                      26
<PAGE>
 
involves writing or purchasing options on one currency to hedge against
changes in exchange rates for a different currency, if there is a pattern of
correlation between the two currencies. As with other kinds of options
transactions, however, the writing of an option on a foreign currency will
constitute only a partial hedge, up to the amount of the premium received. If
an option that a Fund has written is exercised, the Fund could be required to
purchase or sell foreign currencies at disadvantageous exchange rates, thereby
incurring losses. The purchase of an option on foreign currency may constitute
an effective hedge against exchange rate fluctuations; however, in the event
of exchange rate movements adverse to a Fund's position, the Fund may forfeit
the entire amount of the premium plus related transaction costs. In addition
to purchasing call and put options for hedging purposes, the Balanced Fund may
purchase call or put options on currency to seek to increase total return when
the Investment Adviser anticipates that the currency will appreciate or
depreciate in value, but the securities quoted or denominated in that currency
do not present attractive investment opportunities and are not held in the
Fund's portfolio. When purchased or sold to seek to increase total return,
options on currencies are considered speculative. Options on foreign
currencies written or purchased by the Funds are traded on U.S. and foreign
exchanges or over-the-counter.
 
FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS
 
  To seek to increase total return or to hedge against changes in interest
rates, securities prices or currency exchange rates, a Fund may purchase and
sell various kinds of futures contracts, and purchase and write call and put
options on any of such futures contracts. Each Fund may also enter into
closing purchase and sale transactions with respect to any such contracts and
options. The futures contracts may be based on various securities (such as
U.S. Government securities), foreign currencies, securities indices and other
financial instruments and indices. The CORE U.S. Equity and CORE Large Cap
Growth Funds may enter into such transactions only with respect to the S&P 500
Index in the case of the CORE U.S. Equity Fund and a representative index in
the case of the CORE Large Cap Growth Fund. A Fund will engage in futures and
related options transactions for bona fide hedging purposes as defined in
regulations of the Commodity Futures Trading Commission or to seek to increase
total return to the extent permitted by such regulations. A Fund may not
purchase or sell futures contracts or purchase or sell related options to seek
to increase total return, except for closing purchase or sale transactions, if
immediately thereafter the sum of the amount of initial margin deposits and
premiums paid on the Fund's outstanding positions in futures and related
options entered into for the purpose of seeking to increase total return would
exceed 5% of the market value of the Fund's net assets. These transactions
involve brokerage costs, require margin deposits and, in the case of contracts
and options obligating a Fund to purchase securities or currencies, require
the Fund to segregate and maintain cash or liquid assets with a value equal to
the amount of the Fund's obligations or to otherwise cover the obligations in
a manner permitted by the SEC.
 
  While transactions in futures contracts and options on futures may reduce
certain risks, such transactions themselves entail certain other risks. See
"Investment Objectives and Policies--Futures Contracts and Options on Future
Contracts" in the Additional Statement. Thus, while a Fund may benefit from
the use of futures and options on futures, unanticipated changes in interest
rates, securities prices or currency exchange rates may result in poorer
overall performance than if the Fund had not entered into any futures
contracts or options transactions. Because perfect correlation between a
futures position and portfolio position that is intended to be protected is
impossible to achieve, the desired protection may not be obtained and a Fund
may be exposed to risk of loss. The loss incurred by a Fund in entering into
futures contracts and in writing call options on futures is potentially
unlimited and may exceed the amount of the premium received. Futures markets
are highly volatile and the use of futures may increase the volatility of a
Fund's NAV. The profitability of a Fund's trading in futures to seek to
increase total return depends upon the ability of the Investment Adviser to
analyze correctly the futures markets. In addition, because of the low margin
deposits normally required in futures trading, a relatively small price
 
                                      27
<PAGE>
 
movement in a futures contract may result in substantial losses to a Fund.
Further, futures contracts and options on futures may be illiquid, and
exchanges may limit fluctuations in futures contract prices during a single
day. The Funds may engage in futures transactions on both U.S. and foreign
exchanges. Foreign exchanges may not provide the same protection as U.S.
exchanges.
 
STANDARD AND POOR'S DEPOSITORY RECEIPTS
 
  Each Fund may, consistent with its objectives, purchase Standard & Poor's
Depository Receipts ("SPDRs"). SPDRs are American Stock Exchange-traded
securities that represent ownership in the SPDR Trust, a trust which has been
established to accumulate and hold a portfolio of common stocks that is
intended to track the price performance and dividend yield of the S&P 500.
This trust is sponsored by a subsidiary of the American Stock Exchange. SPDRs
may be used for several reasons, including but not limited to: facilitating
the handling of cash flows or trading, or reducing transaction costs. The use
of SPDRs would introduce additional risk to the Fund as the price movement of
the instrument does not perfectly correlate with the price action of the
underlying index.
 
EQUITY SWAPS
 
  Each Fund may invest up to 10% of its total assets in equity swaps. Equity
swaps allow the parties to a swap agreement to exchange the dividend income or
other components of return on an equity investment (e.g., a group of equity
securities or an index) for a component of return on another non-equity or
equity investment. An equity swap may be used by a Fund to invest in a market
without owning or taking physical custody of securities in circumstances in
which direct investment may be restricted for legal reasons or is otherwise
impractical. Equity swaps are derivatives and their value can be very
volatile. To the extent that the Investment Adviser does not accurately
analyze and predict the potential relative fluctuation of the components
swapped with another party, a Fund may suffer a loss. The value of some
components of an equity swap (such as the dividends on a common stock) may
also be sensitive to changes in interest rates. Furthermore, during the period
a swap is outstanding, a Fund may suffer a loss if the counterparty defaults.
In connection with its investments in equity swaps, a Fund will either
segregate cash or liquid assets or otherwise cover its obligations in a manner
required by the SEC.
 
WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS
 
  Each Fund may purchase when-issued securities. When-issued transactions
arise when securities are purchased by a Fund with payment and delivery taking
place in the future in order to secure what is considered to be an
advantageous price and yield to the Fund at the time of entering into the
transaction. Each Fund may also purchase or sell securities on a forward
commitment basis; that is, make contracts to purchase or sell securities for a
fixed price at a future date beyond the customary three-day settlement period.
The purchase of securities on a when-issued or forward commitment basis
involves a risk of loss if the value of the security to be purchased declines
prior to the settlement date. Conversely, securities sold on a forward
commitment basis involve the risk that the value of the securities to be sold
may increase prior to the settlement date. Although a Fund would generally
purchase securities on a when-issued or forward commitment basis with the
intention of acquiring securities for its portfolio, a Fund may dispose of
when-issued securities or forward commitments prior to settlement if the
Investment Adviser deems it appropriate to do so. A Fund will segregate cash
or liquid assets in an amount sufficient to meet the purchase price until
three days prior to the settlement date. Alternatively, each Fund may enter
into offsetting contracts for the forward sale of other securities that it
owns.
 
ILLIQUID AND RESTRICTED SECURITIES
 
  A Fund will not invest more than 15% of its net assets in illiquid
investments, which include securities (both foreign and domestic) that are not
readily marketable, certain SMBS, repurchase agreements maturing in more than
seven days, time deposits with a notice or demand period of more than seven
days, certain over-the-
 
                                      28
<PAGE>
 
counter options and certain restricted securities, unless it is determined,
based upon a review of the trading markets for a specific restricted security,
that such restricted security is eligible for resale under Rule 144A under the
Securities Act of 1933 and, therefore, is liquid. The Trustees have adopted
guidelines under which the Investment Adviser determines and monitors the
liquidity of portfolio securities, subject to the oversight of the Trustees.
Investing in restricted securities eligible for resale pursuant to Rule 144A
may decrease the liquidity of a Fund's portfolio to the extent that qualified
institutional buyers become for a time uninterested in purchasing these
restricted securities. The purchase price and subsequent valuation of
restricted and illiquid securities normally reflect a discount, which may be
significant, from the market price of comparable securities for which a liquid
market exists.
 
REPURCHASE AGREEMENTS
 
  Each Fund may enter into repurchase agreements with dealers in U.S.
Government securities and member banks of the Federal Reserve System which
furnish collateral at least equal in value or market price to the amount of
their repurchase obligation. The Balanced Fund may also enter into repurchase
agreements involving certain foreign government securities. If the other party
or "seller" defaults, a Fund might suffer a loss to the extent that the
proceeds from the sale of the underlying securities and other collateral held
by the Fund in connection with the related repurchase agreement are less than
the repurchase price. In addition, in the event of bankruptcy of the seller or
failure of the seller to repurchase the securities as agreed, a Fund could
suffer losses, including loss of interest on or principal of the security and
costs associated with delay and enforcement of the repurchase agreement. The
Trustees have reviewed and approved certain counterparties whom they believe
to be creditworthy and have authorized the Funds to enter into repurchase
agreements with such counterparties. In addition, each Fund, together with
other registered investment companies having management agreements with an
Investment Adviser or its affiliates, may transfer uninvested cash balances
into a single joint account, the daily aggregate balance of which will be
invested in one or more repurchase agreements.
 
LENDING OF PORTFOLIO SECURITIES
 
  Each Fund may also seek to increase its income by lending portfolio
securities. Under present regulatory policies, such loans may be made to
institutions, such as certain broker-dealers, and are required to be secured
continuously by collateral in cash, cash equivalents, or U.S. Government
securities maintained on a current basis in an amount at least equal to the
market value of the securities loaned. Cash collateral may be invested in cash
equivalents. If the Investment Adviser determines to make securities loans,
the value of the securities loaned may not exceed 33 1/3% of the value of the
total assets of a Fund (including the loan collateral). A Fund may experience
a loss or delay in the recovery of its securities if the institution with
which it has engaged in a portfolio loan transaction breaches its agreement
with the Fund.
 
MORTGAGE DOLLAR ROLLS
 
  The Balanced Fund may enter into mortgage "dollar rolls" in which the Fund
sells securities for delivery in the current month and simultaneously
contracts with the same counterparty to repurchase substantially similar (same
type, coupon and maturity) but not identical securities on a specified future
date. During the roll period, the Fund loses the right to receive principal
and interest paid on the securities sold. However, the Fund would benefit to
the extent of any difference between the price received for the securities
sold and the lower forward price for the future purchase or fee income plus
the interest earned on the cash proceeds of the securities sold until the
settlement date for the forward purchase. Unless such benefits exceed the
income, capital appreciation and gain or loss due to mortgage prepayments that
would have been realized on the securities sold as part of the mortgage dollar
roll, the use of this technique will diminish the investment performance of
the Fund. The Fund
 
                                      29
<PAGE>
 
will segregate cash or liquid assets in an amount equal to the forward
purchase price until the settlement date. Successful use of mortgage dollar
rolls depends upon the Investment Adviser's ability to predict correctly
interest rates and mortgage prepayments. There is no assurance that mortgage
dollar rolls can be successfully employed. For financial reporting and tax
purposes, the Fund treats mortgage dollar rolls as two separate transactions:
one involving the purchase of a security and a separate transaction involving
a sale. The Fund does not currently intend to enter into mortgage dollar rolls
that are accounted for as a financing.
 
SHORT SALES AGAINST-THE-BOX
 
  Each Fund (other than the CORE Funds) may make short sales of securities or
maintain a short position, provided that at all times when a short position is
open the Fund owns an equal amount of such securities or securities
convertible into or exchangeable for, without payment of any further
consideration, an equal amount of the securities of the same issuer as the
securities sold short (a short sale against-the-box). Not more than 25% of a
Fund's net assets (determined at the time of the short sale) may be subject to
such short sales. As a result of recent tax legislation, short sales may not
generally be used to defer the recognition of gain for tax purposes with
respect to appreciated securities in a Fund's portfolio.
 
TEMPORARY INVESTMENTS
 
  Each Fund may, for temporary defensive purposes, invest 100% of its total
assets (except that the CORE Funds may only hold up to 35% of their respective
total assets) in U.S. Government securities, repurchase agreements
collateralized by U.S. Government securities, commercial paper rated at least
A-2 by Standard & Poor's or P-2 by Moody's, certificates of deposit, bankers'
acceptances, repurchase agreements, non-convertible preferred stocks and non-
convertible corporate bonds with a remaining maturity of less than one year.
When a Fund's assets are invested in such instruments, the Fund may not be
achieving its investment objective.
 
MISCELLANEOUS TECHNIQUES
 
  In addition to the techniques and investments described above, each Fund
may, with respect to no more than 5% of its net assets, engage in the
following techniques and investments: (i) warrants and stock purchase rights;
(ii) currency swaps (Balanced Fund only); (iii) credit swaps, mortgage swaps,
index swaps and interest rate swaps, caps, floors and collars (Balanced Fund
only); (iv) yield curve options and inverse floating rate securities (Balanced
Fund only); (v) other investment companies including World Equity Benchmark
Shares; (vi) unseasoned companies; (vii) municipal securities (Balanced Fund
only); (viii) loan participations (Balanced Fund only); (ix) custodial
receipts; and (x) reverse repurchase agreements for investment purposes
(Balanced Fund only).
 
  In addition, each Fund may borrow up to 33 1/3% of its total assets from
banks for temporary or emergency purposes. A Fund may not make additional
investments if borrowings (excluding covered mortgage dollar rolls) exceed 5%
of its total assets. For more information see the Additional Statement.
 
 
                                 RISK FACTORS
 
  Risks of Investing in Equity Securities. In general, the Funds are subject
to the risks associated with investments in common stocks and other equity
securities. Stock values fluctuate in response to the activities of individual
companies and in response to general market and economic conditions and,
accordingly, the value of the stocks that a Fund holds may decline over short
or extended periods. The U.S. stock markets tend to be cyclical, with periods
when stock prices generally rise and periods when prices generally decline. As
of the date of this Prospectus, domestic stock markets were trading at or
close to record high levels and there can be no guarantee that such levels
will continue.
 
                                      30
<PAGE>
 
  RISKS OF INVESTING IN SMALL CAPITALIZATION COMPANIES. Investing in the
securities of such companies involves greater risk and the possibility of
greater portfolio price volatility. Historically, small market capitalization
stocks and stocks of recently organized companies have been more volatile in
price than the larger market capitalization stocks included in the S&P 500
Index. Among the reasons for the greater price volatility of these small
company and unseasoned stocks are the less certain growth prospects of smaller
firms and the lower degree of liquidity in the markets for such stocks.
 
  SPECIAL RISKS OF INVESTMENTS IN EMERGING MARKETS. Investing in the
securities of issuers in Emerging Countries involves risks in addition to
those discussed under "Description of Securities-- Foreign Investments." The
Growth and Income, Mid Cap Equity and Small Cap Value Funds may each invest up
to 25%, the Balanced Fund may invest up to 20% and the Capital Growth Fund may
invest up to 10% of their respective total assets in securities of issuers in
Emerging Countries. Emerging Countries are generally located in the Asia-
Pacific region, Eastern Europe, Latin and South America and Africa.
 
  Foreign investment in the securities markets of certain Emerging Countries
is restricted or controlled to varying degrees which may limit investment in
such countries or increase the administrative costs of such investments.
Certain countries may restrict or prohibit investment opportunities in issuers
or industries deemed important to national interests. Such restrictions may
affect the market price, liquidity and rights of securities that may be
purchased by a Fund. The repatriation of both investment income and capital
from certain Emerging Countries is subject to restrictions such as the need
for governmental consents. Many Emerging Countries may be subject to a greater
degree of economic, political and social instability than is the case in
Western Europe, the United States, Canada, Australia, New Zealand and Japan.
Many Emerging Countries do not have fully democratic governments. For example,
governments of some Emerging Countries are authoritarian in nature or have
been installed or removed as a result of military coups, while governments in
other Emerging Countries have periodically used force to suppress civil
dissent. Many Emerging Countries have experienced currency devaluations and
substantial and, in some cases, extremely high rates of inflation, which have
a negative effect on the economies and securities markets of such Emerging
Countries. Settlement procedures in Emerging Countries are frequently less
developed and reliable than those in the United States and may involve a
Fund's delivery of securities before receipt of payment for their sale. In
addition, significant delays are common in certain markets in registering the
transfer of securities. Settlement or registration problems may make it more
difficult for a Fund to value its portfolio securities and could cause the
Fund to miss attractive investment opportunities, to have a portion of its
assets uninvested or to incur losses due to the failure of a counterparty to
pay for securities the Fund has delivered or the Fund's inability to complete
its contractual obligations.
 
  RISKS OF INVESTING IN FIXED-INCOME SECURITIES. When interest rates decline,
the market value of fixed-income securities tends to increase. Conversely,
when interest rates increase, the market value of fixed income securities
tends to decline. Volatility of a security's market value will differ
depending upon the security's duration, the issuer and the type of instrument.
Investments in fixed-income securities are subject to the risk that the issuer
could default on its obligations and a Fund could sustain losses on such
investments. A default could impact both interest and principal payments.
 
  RISKS OF DERIVATIVE TRANSACTIONS. A Fund's transactions, if any, in options,
futures, options on futures, swaps, structured securities and currency
transactions involve certain risks, including a possible lack of correlation
between changes in the value of hedging instruments and the portfolio assets
(if any) being hedged, the potential illiquidity of the markets for derivative
instruments, the risks arising from margin requirements and related leverage
factors associated with such transactions. The use of these management
techniques to seek to increase total return may be regarded as a speculative
practice and involves the risk of loss if the Investment Adviser is incorrect
in its expectation of fluctuations in securities prices, interest rates or
currency prices. A Fund's use of certain derivative transactions may be
limited by the requirements of the Internal Revenue Code of 1986, as amended
(the "Code"), for qualification as a regulated investment company.
 
                                      31
<PAGE>
 
 
                            INVESTMENT RESTRICTIONS
 
  Each Fund is subject to certain investment restrictions that are described
in detail under "Investment Restrictions" in the Additional Statement.
Fundamental investment restrictions of a Fund cannot be changed without
approval of a majority of the outstanding Shares of that Fund as defined in
the Additional Statement. Each Fund's investment objectives and all policies
not specifically designated as fundamental are non-fundamental and may be
changed without shareholder approval. If there is a change in a Fund's
investment objectives, shareholders should consider whether that Fund remains
an appropriate investment in light of their then current financial positions
and needs.
 
 
                              PORTFOLIO TURNOVER
 
  A high rate of portfolio turnover (100% or more) involves correspondingly
greater expenses which must be borne by a Fund and its shareholders. See
"Financial Highlights" for a statement of each Fund's historical portfolio
turnover rate. The portfolio turnover rate is calculated by dividing the
lesser of the dollar amount of sales or purchases of portfolio securities by
the average monthly value of a Fund's portfolio securities, excluding
securities having a maturity at the date of purchase of one year or less. The
Investment Adviser will not consider the portfolio turnover rate a limiting
factor in making investment decisions for a Fund consistent with the Fund's
investment objectives and portfolio management policies.
 
 
                                  MANAGEMENT
 
TRUSTEES AND OFFICERS
 
  The Trustees are responsible for deciding matters of general policy and
reviewing the actions of the Investment Adviser, Distributor and transfer
agent. The officers of the Trust conduct and supervise the Funds' daily
business operations. The Additional Statement contains information as to the
identity of, and other information about, the Trustees and officers of the
Trust.
 
INVESTMENT ADVISERS
 
  INVESTMENT ADVISERS. Goldman Sachs Asset Management, One New York Plaza, New
York, New York 10004, a separate operating division of Goldman Sachs, serves
as investment adviser to the Balanced, Growth and Income, CORE Large Cap
Growth, CORE Small Cap Equity, Mid Cap Equity and Small Cap Value Funds.
Goldman Sachs registered as an investment adviser in 1981. Goldman Sachs Funds
Management, L.P., One New York Plaza, New York, New York 10004, a Delaware
limited partnership which is an affiliate of Goldman Sachs, serves as the
investment adviser to the CORE U.S. Equity and Capital Growth Funds. Goldman
Sachs Funds Management, L.P. registered as an investment adviser in 1990. The
Goldman Sachs Group, L.P., which controls the Investment Advisers, has
announced that it will pursue an initial public offering of the firm during
the fourth quarter of 1998; if the public offering is consummated, The Goldman
Sachs Group, L.P. will merge into the new public company, which will be called
The Goldman Sachs Group, Inc. As of July 24, 1998, GSAM and GSFM together with
their affiliates, acted as investment adviser or distributor for assets in
excess of $168 billion.
 
  Under a Management Agreement with each Fund, the applicable Investment
Adviser, subject to the general supervision of the Trustees, provides day-to-
day advice as to the Fund's portfolio transactions. Goldman Sachs has agreed
to permit the Funds to use the name "Goldman Sachs" or a derivative thereof as
part of each Fund's name for as long as a Fund's Management Agreement is in
effect.
 
                                      32
<PAGE>
 
  In performing its investment advisory services, each Investment Adviser,
while remaining ultimately responsible for the management of the Funds, is
able to draw upon the research and expertise of its asset management
affiliates for portfolio decisions and management with respect to certain
portfolio securities. In addition, the Investment Adviser will have access to
the research of, and certain proprietary technical models developed by,
Goldman Sachs and may apply quantitative and qualitative analysis in
determining the appropriate allocations among the categories of issuers and
types of securities.
 
  Under the Management Agreement, the Investment Adviser also: (i) supervises
all non-advisory operations of each Fund that it advises; (ii) provides
personnel to perform such executive, administrative and clerical services as
are reasonably necessary to provide effective administration of each Fund;
(iii) arranges for at each Fund's expense (a) the preparation of all required
tax returns, (b) the preparation and submission of reports to existing
shareholders, (c) the periodic updating of prospectuses and Additional
Statements and (d) the preparation of reports to be filed with the SEC and
other regulatory authorities; (iv) maintains each Fund's records; and (v)
provides office space and all necessary office equipment and services.
 
 FUND MANAGERS
 
<TABLE>
<CAPTION>
                                                          YEARS
                                                          PRIMARILY
       NAME AND TITLE          FUND RESPONSIBILITY        RESPONSIBLE     FIVE YEAR EMPLOYMENT HISTORY
  ------------------------- --------------------------    ----------- ----------------------------
  <C>                       <C>                           <C>         <S>
  George D. Adler              Senior Portfolio Manager--    Since      Mr. Adler joined the
   Vice President              Capital Growth                1997       Investment Adviser in
                                                                        1997. From 1990 to 1997,
                                                                        he was a portfolio
                                                                        manager at Liberty
                                                                        Investment Management,
                                                                        Inc. From 1988 to 1990
                                                                        he was a director of
                                                                        portfolio management at
                                                                        Banc One in Ohio.
- ------------------------------------------------------------------------------------------------------
  Eileen A. Aptman             Senior Portfolio Manager--    Since      Ms. Aptman joined the
   Vice President              Mid Cap Equity                1996       Investment Adviser in
                               Small Cap Value               1997       1993. From 1990 to 1993,
                                                                        she worked at Delphi
                                                                        Management as an equity
                                                                        analyst, focusing her
                                                                        research efforts on
                                                                        value stocks.
- ------------------------------------------------------------------------------------------------------
  Jonathan A. Beinner          Senior Portfolio Manager--    Since      Mr. Beinner joined the
   Managing Director and       Balanced (Fixed Income)       1994       Investment Adviser in
   Co-Head U.S. Fixed                                                   1990. From 1988 to 1990,
   Income                                                               he worked as a portfolio
                                                                        manager at Franklin
                                                                        Savings Association in
                                                                        the trading and
                                                                        arbitrage group.
- ------------------------------------------------------------------------------------------------------
  Melissa Brown                Senior Portfolio Manager--    Since      Ms. Brown joined the
   Vice President              CORE U.S. Equity              1998       Investment Adviser in
                               CORE Large Cap Growth         1998       1998. From 1984 to 1998,
                               CORE Small Cap Equity         1998       she was the director of
                                                                        Quantitative Equity
                                                                        Research and served on
                                                                        the Investment Policy
                                                                        Committee at Prudential
                                                                        Securities.
- ------------------------------------------------------------------------------------------------------
  Kent A. Clark                Senior Portfolio Manager--    Since      Mr. Clark joined the
   Vice President              CORE U.S. Equity              1996       Investment Adviser in
                               CORE Large Cap Growth         1997       1992.
                               CORE Small Cap Equity         1997
- ------------------------------------------------------------------------------------------------------
  Robert G. Collins            Senior Portfolio Manager--    Since      Mr. Collins joined the
   Vice President              Capital Growth                1997       Investment Adviser in
                                                                        1997. From 1991 to 1997,
                                                                        he was a portfolio
                                                                        manager at Liberty
                                                                        Investment Management,
                                                                        Inc. His past
                                                                        experiences include work
                                                                        as a special situations
                                                                        analyst with Raymond
                                                                        James & Associates for
                                                                        five years.
</TABLE>
 
                                      33
<PAGE>
 
<TABLE>
<CAPTION>
                                                     YEARS
                                                     PRIMARILY
    NAME AND TITLE       FUND RESPONSIBILITY         RESPONSIBLE     FIVE YEAR EMPLOYMENT HISTORY
  ------------------- --------------------------     ----------- ----------------------------
  <C>                 <C>                            <C>         <S>
  Herbert E. Ehlers      Senior Portfolio Manager--     Since      Mr. Ehlers joined the
   Managing Director     Capital Growth                 1997       Investment Adviser in
                                                                   1997. From 1994 to 1997,
                                                                   he was the Chief
                                                                   Investment Officer and
                                                                   Chairman of Liberty
                                                                   Investment Management,
                                                                   Inc. He was a portfolio
                                                                   manager and president at
                                                                   Liberty's predecessor
                                                                   firm, Eagle Asset
                                                                   Management, from 1984 to
                                                                   1994.
- -------------------------------------------------------------------------------------------------
  Gregory H. Ekizian     Senior Portfolio Manager--     Since      Mr. Ekizian joined the
   Vice President        Capital Growth                 1997       Investment Adviser in
                                                                   1997. From 1990 to 1997,
                                                                   he was a portfolio
                                                                   manager at Liberty
                                                                   Investment Management,
                                                                   Inc. and its predecessor
                                                                   firm, Eagle Asset
                                                                   Management.
- -------------------------------------------------------------------------------------------------
  Paul D. Farrell        Senior Portfolio Manager--     Since      Mr. Farrell joined the
   Vice President        Mid Cap Equity                 1998       Investment Adviser in
                         Small Cap Value                1992       1991. In 1998, he became
                                                                   responsible for managing
                                                                   the Investment Adviser's
                                                                   Value team. During 1991,
                                                                   he served as a managing
                                                                   director at Plaza
                                                                   Investment Managers, the
                                                                   investment subsidiary of
                                                                   GEICO Corp., a major
                                                                   insurance company. From
                                                                   1986 to 1991, he was
                                                                   employed by Goldman
                                                                   Sachs as a vice
                                                                   president in the
                                                                   investment research
                                                                   department and was
                                                                   responsible for the
                                                                   formation of the firm's
                                                                   Emerging Growth Research
                                                                   Group.
- -------------------------------------------------------------------------------------------------
  Greg Gigliotti         Senior Portfolio Manager--     Since      Mr. Gigliotti joined the
   Vice President        Growth and Income              1998       Investment Adviser in
                         Balanced (Equity)              1998       1997. From 1996 to 1997
                         Mid Cap Equity                 1998       he was a Vice President
                                                                   and senior analyst at
                                                                   Franklin Mutual
                                                                   Advisors, Inc., the
                                                                   asset management
                                                                   division of Franklin
                                                                   Resources, Inc. From
                                                                   1989 to 1996 he was a
                                                                   Vice President and
                                                                   senior analyst at Heine
                                                                   Securities Corporation
                                                                   which was purchased by
                                                                   Franklin Resources, Inc.
- -------------------------------------------------------------------------------------------------
  Robert C. Jones         Senior Portfolio Manager--    Since      Mr. Jones joined the
   Managing Director      CORE U.S. Equity              1991       Investment Adviser in
                          CORE Large Cap Growth         1997       1989. From 1987 to 1989,
                          CORE Small Cap Equity         1997       he was the senior
                                                                   quantitative analyst in
                                                                   the Goldman Sachs
                                                                   Investment Research
                                                                   Department and the
                                                                   author of the monthly
                                                                   Stock Selection
                                                                   publication.
- -------------------------------------------------------------------------------------------------
  Richard C. Lucy         Senior Portfolio Manager--    Since      Mr. Lucy joined the
   Vice President and     Balanced (Fixed Income)       1994       Investment Adviser in
   Co-Head U.S.                                                    1992. From 1983 to 1992,
   Fixed Income                                                    he managed fixed income
                                                                   assets at Brown Brothers
                                                                   Harriman & Co.
- -------------------------------------------------------------------------------------------------
  Matthew B. McLennan     Senior Portfolio Manager--    Since      Mr. McLennan joined the
   Vice President         Mid Cap Equity                1998       Investment Adviser in
                          Small Cap Value               1996       1995. From 1994 to 1995,
                                                                   he worked in the
                                                                   Investment Banking
                                                                   Division of Goldman
                                                                   Sachs in Australia. From
                                                                   1991 to 1994, Mr.
                                                                   McLennan worked at
                                                                   Queensland Investment
                                                                   Corporation in
                                                                   Australia.
- -------------------------------------------------------------------------------------------------
  Victor H. Pinter        Senior Portfolio Manager--    Since      Mr. Pinter joined the
   Vice President         CORE U.S. Equity              1996       Investment Adviser in
                          CORE Large Cap Growth         1997       1990. From 1985 to 1990,
                          CORE Small Cap Equity         1997       he was a project manager
                                                                   in the Information
                                                                   Technology Division of
                                                                   the Investment Adviser.
</TABLE>
 
 
                                       34
<PAGE>
 
<TABLE>
<CAPTION>
                                                        YEARS
                                                        PRIMARILY
      NAME AND TITLE        FUND RESPONSIBILITY         RESPONSIBLE     FIVE YEAR EMPLOYMENT HISTORY
  ---------------------- --------------------------     ----------- ----------------------------
  <C>                    <C>                            <C>         <S>
  Thomas S. Price            Senior Portfolio Manager--    Since      Mr. Price joined the
   Vice President            Growth and Income             1998       Investment Adviser in
                             Balanced (Equity)             1998       1997. From 1996 to 1997
                             Mid Cap Equity                1998       he was a Vice President
                                                                      and senior analyst at
                                                                      Franklin Mutual
                                                                      Advisors, Inc., the
                                                                      asset management
                                                                      division of Franklin
                                                                      Resources, Inc. From
                                                                      1993 to 1996 he was a
                                                                      Vice President and
                                                                      senior analyst at Heine
                                                                      Securities Corporation
                                                                      which was purchased by
                                                                      Franklin Resources, Inc.
- ----------------------------------------------------------------------------------------------------
  David G. Shell             Senior Portfolio Manager--    Since      Mr. Shell joined the
   Vice President            Capital Growth                1997       Investment Adviser in
                                                                      1997. From 1987 to 1997,
                                                                      he was a portfolio
                                                                      manager at Liberty
                                                                      Investment Management,
                                                                      Inc. and its predecessor
                                                                      firm, Eagle Asset
                                                                      Management.
- ----------------------------------------------------------------------------------------------------
  Ernest C. Segundo, Jr.     Senior Portfolio Manager--    Since      Mr. Segundo joined the
   Vice President            Capital Growth                1997       Investment Adviser in
                                                                      1997. From 1992 to 1997,
                                                                      he was a portfolio
                                                                      manager at Liberty
                                                                      Investment Management,
                                                                      Inc. From 1990 to 1992,
                                                                      he was an equity
                                                                      research analyst with
                                                                      Fidelity Management &
                                                                      Research Company.
- ----------------------------------------------------------------------------------------------------
  Lawrence S. Sibley         Senior Portfolio Manager--    Since      Mr. Sibley joined the
   Vice President            Growth and Income             1997       Investment Adviser in
                             Balanced (Equity)             1997       1997. From 1994 to 1997,
                             Mid Cap Equity                1997       he headed Institutional
                                                                      Equity Sales at J.P.
                                                                      Morgan Securities and
                                                                      from 1987 to 1994, he
                                                                      was a principal of
                                                                      Sanford C. Bernstein &
                                                                      Co. in its Institutional
                                                                      Sales Department.
- ----------------------------------------------------------------------------------------------------
  Karma Wilson              Senior Portfolio Manager--     Since      Ms. Wilson joined the
   Vice President           Growth and Income              1998       Investment Adviser in
                            Balanced (Equity)              1998       1994. Prior to 1994, she
                            Mid Cap Equity                 1998       was an investment
                                                                      analyst with Bankers
                                                                      Trust Australia Ltd.
                                                                      Before 1992 she was
                                                                      employed at Arthur
                                                                      Andersen LLP.
</TABLE>
  It is the responsibility of the Investment Adviser to make the investment
decisions for a Fund and to place the purchase and sale orders for the Fund's
portfolio transactions in U.S. and foreign markets. Such orders may be
directed to any broker including, to the extent and in the manner permitted by
applicable law, Goldman Sachs or its affiliates. In effecting purchases and
sales of portfolio securities for the Funds, the Investment Adviser will seek
the best price and execution of a Fund's orders. In doing so, where two or
more brokers or dealers offer comparable prices and execution for a particular
trade, consideration may be given to whether the broker or dealer provides
investment research or brokerage services or sells Shares of any Goldman Sachs
Fund. See the Additional Statement for a further description of the Investment
Adviser's brokerage allocation practices.
 
  As compensation for its services rendered and assumption of certain expenses
pursuant to separate Management Agreements, GSAM and GSFM are entitled to the
following fees, computed daily and payable monthly at the annual rates listed
below:
<TABLE>
<CAPTION>
                                                               FOR THE FISCAL
                                                CONTRACTUAL YEAR OR PERIOD ENDED
                                                   RATE*     JANUARY 31, 1998*
                                                ----------- --------------------
     <S>                                        <C>         <C>
     GSAM
     ----
     Balanced..................................    0.65%           0.65%
     Growth and Income.........................    0.70%           0.70%
     CORE Large Cap Growth.....................    0.75%           0.60%
     CORE Small Cap Equity.....................    0.85%           0.75%
     Mid Cap Equity............................    0.75%           0.75%
     Small Cap Value...........................    1.00%           1.00%
     GSFM
     ----
     CORE U.S. Equity..........................    0.75%           0.59%
     Capital Growth............................    1.00%           1.00%
</TABLE>
                                                       (footnotes on next page)
 
                                      35
<PAGE>
 
- ---------------------
*All numbers are annualized. The difference, if any, between the stated fees
and the actual fees paid by the Funds reflects that the applicable Investment
Adviser did not charge the full amount of the fees to which it would have been
entitled. Effective September 1, 1998, the management fee for the CORE U.S.
Equity and CORE Small Cap Equity Funds will equal 0.70% and 0.85%,
respectively. The Investment Adviser may discontinue or modify any limitations
in the future at its discretion.
 
  The Investment Adviser has voluntarily agreed to reduce or limit certain
"Other Expenses" of the Funds (excluding management fees, service fees,
transfer agency fees, taxes, interest and brokerage fees and litigation,
indemnification and other extraordinary expenses) to the extent such expenses
exceed 0.01%, 0.05%, 0.00%, 0.00%, 0.04%, 0.00%, 0.10% and 0.06% per annum of
the average daily net assets of the Balanced, Growth and Income, CORE U.S.
Equity, CORE Large Cap Growth, CORE Small Cap Equity, Capital Growth, Mid Cap
Equity and Small Cap Value Funds, respectively. Such reductions or limits, if
any, may be discontinued or modified by the applicable Investment Adviser in
its discretion at any time.
 
  ACTIVITIES OF GOLDMAN SACHS AND ITS AFFILIATES AND OTHER ACCOUNTS MANAGED BY
GOLDMAN SACHS. The involvement of the Investment Adviser, Goldman Sachs and
their affiliates in the management of, or their interest in, other accounts
and other activities of Goldman Sachs may present conflicts of interest with
respect to a Fund or limit a Fund's investment activities. Goldman Sachs and
its affiliates engage in proprietary trading and advise accounts and funds
which have investment objectives similar to those of the Funds and/or which
engage in and compete for transactions in the same type of securities,
currencies and instruments as the Funds. Goldman Sachs and its affiliates will
not have any obligation to make available any information regarding their
proprietary activities or strategies, or the activities or strategies used for
other accounts managed by them, for the benefit of the management of the
Funds. The results of a Fund's investment activities, therefore, may differ
from those of Goldman Sachs and its affiliates and it is possible that a Fund
could sustain losses during periods in which Goldman Sachs and its affiliates
and other accounts achieve significant profits on their trading for
proprietary or other accounts. In addition, the Funds may, from time to time,
enter into transactions in which other clients of
Goldman Sachs have an adverse interest. From time to time, a Fund's activities
may be limited because of regulatory restrictions applicable to Goldman Sachs
and its affiliates, and/or their internal policies designed to comply with
such restrictions. See "Management--Activities of Goldman Sachs and its
Affiliates and Other Accounts Managed by Goldman Sachs" in the Additional
Statement for further information.
 
DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs, 85 Broad Street, New York, New York 10004, serves as the
exclusive distributor (the "Distributor") of each Fund's Shares. Goldman
Sachs, 4900 Sears Tower, Chicago, Illinois 60606, also serves as each Fund's
transfer agent (the "Transfer Agent") and as such performs various shareholder
servicing functions. Shareholders with inquiries regarding a Fund should
contact Goldman Sachs (as Transfer Agent) at the address or the telephone
number set forth on the back cover page of this Prospectus. Goldman Sachs is
entitled to receive a transfer agency fee with respect to each Fund's
Institutional and Service Shares equal, on an annual basis, to 0.04% of
average daily net assets.
 
  From time to time, Goldman Sachs or any of its affiliates may purchase and
hold Shares of the Funds. Goldman Sachs reserves the right to redeem at any
time some or all of the Shares acquired for its own account.
 
YEAR 2000
 
  Many computer systems were designed using only two digits to signify the
year (for example, "98" for "1998"). On January 1, 2000, if these computer
systems are not corrected, they may incorrectly interpret "00"
 
                                      36
<PAGE>
 
as the year "1900" rather than the year "2000," leading to computer shutdowns
or errors (commonly known as the "Year 2000 Problem"). To the extent these
systems conduct forward-looking calculations, these computer problems may
occur prior to January 1, 2000. Like other investment companies and financial
and business organizations, the Funds could be adversely affected in their
ability to process securities trades, price securities, provide shareholder
account services and otherwise conduct normal business operations if the
computer systems used by the Investment Adviser or other Fund service
providers do not adequately address this problem in a timely manner. The
Investment Adviser has established a dedicated group to analyze these issues
and to implement the systems modifications necessary to prepare for the Year
2000 Problem. Currently, the Investment Adviser does not anticipate that the
transition to the 21st Century will have any material impact on its ability to
continue to service the Funds at current levels. In addition, the Investment
Adviser has sought assurances from the Funds' other service providers that
they are taking the steps necessary so that they do not experience Year 2000
Problems, and the Investment Adviser will continue to monitor the situation.
At this time, however, no assurance can be given that the actions taken by the
Investment Adviser and the Funds' other service providers will be sufficient
to avoid any adverse effect on the Funds due to the Year 2000 Problem.
 
 
                                   EXPENSES
 
  The Funds are responsible for the payment of their expenses. The expenses
include, without limitation; fees payable to the Investment Adviser; custodial
and transfer agency fees; service fees paid to Service Organizations;
brokerage fees and commissions; filing fees for the registration or
qualification of the Funds' Shares under federal or state securities laws,
organizational expenses; fees and expenses incurred in connection with
membership in investment company organizations; taxes; interest; costs of
liability insurance, fidelity bonds or indemnification; any costs, expenses or
losses arising out of any liability of, or claim for damages or other relief
asserted against, the Funds for violation of any law; legal and auditing fees
and expenses (including the cost of legal and certain accounting services
rendered by employees of the Investment Adviser and its affiliates with
respect to the Funds); expenses of preparing and setting in type prospectuses,
Additional Statements, proxy material, financial reports and notices and the
printing and distributing of the same to shareholders and regulatory
authorities; compensation and expenses of the Trust's "non-interested"
Trustees; and extraordinary organizational expenses, if any, incurred by the
Trust.
 
 
                                NET ASSET VALUE
 
  The NAV per Share of each Class of a Fund is calculated by the Fund's
custodian as of the close of regular trading on the New York Stock Exchange
(which is normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m. New York
time), on each Business Day (as such term is defined under "Additional
Information"). NAV per Share of each Class is calculated by determining the
net assets attributed to each Class and dividing by the number of outstanding
Shares of that Class. Portfolio securities are valued based on market
quotations or, if accurate quotations are not readily available, at fair value
as determined in good faith under procedures established by the Trustees.
 
                                      37
<PAGE>
 
 
                            PERFORMANCE INFORMATION
 
  From time to time each Fund may publish average annual total return and the
Balanced and Growth and Income Funds may publish their yield and distribution
rates in advertisements and communications to shareholders or prospective
investors. Average annual total return is determined by computing the average
annual percentage change in value of $1,000 invested at the maximum public
offering price for specified periods ending with the most recent calendar
quarter, assuming reinvestment of all dividends and distributions at NAV. The
total return calculation assumes a complete redemption of the investment at
the end of the relevant period. Each Fund may also from time to time advertise
total return on a cumulative, average, year-by-year or other basis for various
specified periods by means of quotations, charts, graphs or schedules. In
addition, each Fund may furnish total return calculations based on investments
at various sales charge levels or at NAV. Any performance information which is
based on the NAV per Share would be reduced if any applicable sales charge
were taken into account. In addition to the above, each Fund may from time to
time advertise its performance relative to certain averages, performance
rankings, indices, other information prepared by recognized mutual fund
statistical services and investments for which reliable performance
information is available.
 
  The Balanced and Growth and Income Funds compute their yield by dividing net
investment income earned during a recent thirty-day period by the product of
the average daily number of Shares outstanding and entitled to receive
dividends during the period and the maximum offering price per Share on the
last day of the relevant period. The results are compounded on a bond
equivalent (semi-annual) basis and then annualized. Net investment income per
Share is equal to the dividends and interest earned during the period, reduced
by accrued expenses for the period. The calculation of net investment income
for these purposes may differ from the net investment income determined for
accounting purposes. The Balanced and Growth and Income Funds' quotations of
distribution rate are calculated by annualizing the most recent distribution
of net investment income for a monthly, quarterly or other relevant period and
dividing this amount by the NAV per Share on the last day of the period for
which the distribution rate is being calculated.
 
  Each Fund's total return, yield and distribution rate will be calculated
separately for each Class of Shares in existence. Because each Class of Shares
may be subject to different expenses, the total return, yield and distribution
rate calculations with respect to each Class of Shares for the same period
will differ. See "Shares of the Trust."
 
  The Funds' performance quotations do not reflect any fees charged by a
Service Organization to its customer accounts in connection with investments
in the Funds. The investment results of a Fund will fluctuate over time and
any presentation of investment results for any prior period should not be
considered a representation of what an investment may earn or what the Fund's
performance may be in any future period. In addition to information provided
in shareholder reports, the Funds may, in their discretion, from time to time
make a list of their holdings available to investors upon request.
 
 
                              SHARES OF THE TRUST
 
  Each Fund is a series of Goldman Sachs Trust, which was formed under the
laws of the State of Delaware on January 28, 1997. The Funds were formerly
series of Goldman Sachs Equity Portfolios, Inc., a Maryland corporation, and
were reorganized into the Trust as of April 30, 1997. The Trustees have
authority under the Trust's Declaration of Trust to create and classify Shares
of beneficial interests in separate series, without further
 
                                      38
<PAGE>
 
action by shareholders. Additional series may be added in the future. The
Trustees also have authority to classify and reclassify any series or
portfolio of Shares into one or more Classes. Information about the Trust's
other series and Classes is contained in separate prospectuses.
 
  When issued, Shares are fully paid and non-assessable. In the event of
liquidation, shareholders of each class are entitled to share pro rata in the
net assets of the applicable Fund available for distribution to the
shareholders of such Class. All Shares are freely transferable and have no
preemptive, subscription or conversion rights. Shareholders are entitled to
one vote per Share, provided that, at the option of the Trustees, shareholders
will be entitled to a number of votes based upon the NAVs represented by their
Shares.
 
  As of April 3, 1998, State Street Bank and Trust Company as Trustee for
Goldman Sachs Profit Sharing Master Trust, Attention: Louis Pereira, P.O. Box
1992, Boston, MA 02105-1992 was recordholder of 59.9% of Mid Cap Equity Fund's
outstanding Shares.
 
  The Trust does not intend to hold annual meetings of shareholders. However,
recordholders may, under certain circumstances, as permitted by the Act,
communicate with other shareholders in connection with requiring a special
meeting of shareholders. The Trustees will call a special meeting of
shareholders for the purpose of electing Trustees if, at any time, less than a
majority of Trustees holding office at the time were elected by shareholders.
 
  In the interest of economy and convenience, the Trust does not issue
certificates representing the Funds' Shares. Instead, the Transfer Agent
maintains a record of each shareholder's ownership. Each shareholder receives
confirmation of purchase and redemption orders from the Transfer Agent. Fund
Shares and any dividends and distributions paid by the Fund are reflected in
account statements from the Transfer Agent.
 
 
                                   TAXATION
 
FEDERAL TAXES
 
  Each Fund is treated as a separate entity for tax purposes. Each Fund has
elected to be treated as a regulated investment company and each Fund intends
to continue to qualify for such treatment for each taxable year under
Subchapter M of the Code. To qualify as such, a Fund must satisfy certain
requirements relating to the sources of its income, diversification of its
assets and distribution of its income to shareholders. As a regulated
investment company, a Fund will not be subject to federal income or excise tax
on any net investment income and net realized capital gains that are
distributed to its shareholders in accordance with certain timing requirements
of the Code.
 
  Dividends paid by a Fund from net investment income, certain net realized
foreign exchange gains, the excess of net short-term capital gain over net
long-term capital loss and original issue discount or market discount income
will be taxable to its shareholders as ordinary income. Distributions out of
the net capital gain (the excess of net long-term capital gain over net short-
term capital loss), if any, of a Fund will be taxed to shareholders as long-
term capital gains, regardless of the length of time a shareholder has held
his or her Shares or whether such gain was reflected in the price paid for the
Shares. These tax consequences will apply whether distributions are received
in cash or reinvested in Shares. A Fund's dividends that are paid to its
corporate shareholders and are attributable to qualifying dividends such Fund
receives from U.S. domestic corporations may be eligible, in the
 
                                      39
<PAGE>
 
hands of such corporate shareholders, for the corporate dividends-received
deduction, subject to certain holding period requirements and debt financing
limitations under the Code. Certain distributions paid by a Fund in January of
a given year may be taxable to shareholders as if received the prior December
31. Shareholders will be informed annually about the amount and character of
distributions received from the Funds for federal income tax purposes.
 
  Investors should consider the tax implications of buying Shares immediately
prior to a distribution. Investors who purchase Shares shortly before the
record date for a distribution will pay a per Share price that includes the
value of the anticipated distribution and will be taxed on the distribution
even though the distribution represents a return of a portion of the purchase
price.
 
  Redemptions and exchanges of Shares are taxable events.
 
  Individuals and certain other classes of shareholders may be subject to 31%
backup withholding of federal income tax on distributions, redemptions and
exchanges if they fail to furnish their correct taxpayer identification number
and certain certifications required by the Internal Revenue Service or if they
are otherwise subject to backup withholding. Individuals, corporations and
other shareholders that are not U.S. persons under the Code are subject to
different tax rules and may be subject to nonresident alien withholding at the
rate of 30% (or a lower rate provided by an applicable tax treaty, if any) on
amounts treated as ordinary dividends from the Funds.
 
  Each Fund may be subject to foreign withholding or other foreign taxes on
income or gain from certain foreign securities. In general, the Funds do not
anticipate that they will be eligible to pass any foreign tax credits through
to their shareholders; however, the Funds may deduct these taxes in computing
their taxable income, if any.
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local
or foreign taxes on payments received from the Funds. A state income (and
possibly local income and/or intangible property) tax exemption may be
available to the extent (if any) a Fund's distributions are derived from
interest on (or, in the case of intangible property taxes, the value of its
assets is attributable to) certain U.S. Government obligations, provided in
some states that certain thresholds for holdings of such obligations and/or
reporting requirements are satisfied. For a further discussion of certain tax
consequences of investing in Shares of the Funds, see "Taxation" in the
Additional Statement. Shareholders are urged to consult their own tax advisers
regarding specific questions as to federal, state and local taxes as well as
to any foreign taxes.
 
 
                            ADDITIONAL INFORMATION
 
  As used in this Prospectus, the term "Business Day" means any day the New
York Stock Exchange is open for trading, which is Monday through Friday except
for holidays. The New York Stock Exchange is closed on the following holidays:
New Year's Day, Martin Luther King, Jr. Day, Presidents' Day (observed), Good
Friday, Memorial Day (observed), Independence Day, Labor Day, Thanksgiving Day
and Christmas Day.
 
                                      40
<PAGE>
 
 
                              ADDITIONAL SERVICES
 
 
  The Trust, on behalf of the Funds, has adopted a Service Plan with respect to
the Service Shares which authorizes a Fund to compensate certain institutions
("Service Organizations") for providing account administration and personal and
account maintenance services to their customers who are beneficial owners of
such Shares. The Trust, on behalf of the Funds, enters into agreements with
Service Organizations which purchase Service Shares on behalf of their custom-
ers ("Service Agreements"). The Service Agreements provide for compensation to
the Service Organizations in an amount up to 0.50% (on an annualized basis) of
the average daily net assets of the Service Shares of the Fund attributable to
or held in the name of the Service Organization for its customers; provided,
however, that the fee paid for personal and account maintenance services may
not exceed 0.25% of such average daily net assets. The services provided by the
Service Organizations may include acting, directly or through an agent, as the
sole shareholder of record, maintaining account records for customers, process-
ing orders to purchase, redeem or exchange Service Shares for customers, re-
sponding to inquiries from prospective and existing shareholders and assisting
customers with investment procedures.
 
  The Trust may authorize certain Service Organizations to accept on the
Trust's behalf, purchase, redemption and exchange orders placed by their
customers and, if approved by the Trust, to designate other intermediaries to
accept such orders. In these cases, a Fund will be deemed to have received an
order in proper form when the order is accepted by the authorized Service
Organization or intermediary on a Business Day, and the order will be priced at
a Fund's NAV per Share next determined after such acceptance. The Service
Organization or intermediary will be responsible for transmitting accepted
orders to the Trust within the period agreed upon by them. A customer may
contact its Service Organization to learn whether the Service Organization is
authorized to accept orders. Service Organizations that are authorized to
accept orders for the Trust may receive payments from the Funds or Goldman
Sachs that are in addition to the payments payable by the Trust under the
Service Plan.
 
  Holders of Service Shares of a Fund bear all expenses and fees paid to Serv-
ice Organizations under the Service Plan as well as any other expenses which
are directly attributable to such Shares.
 
  Service Organizations may charge fees directly to their customers who are the
beneficial owners of Service Shares in connection with their customer accounts.
These fees would be in addition to any amounts received by the Service Organi-
zation under a Service Agreement and may affect the return earned on an invest-
ment in a Fund. The Trust, on behalf of the Funds, accrues payments made pursu-
ant to a Service Agreement daily. All inquiries of beneficial owners of Service
Shares should be directed to such owners' Service Organization.
 
  For the fiscal year ended January 31, 1998, the Trust paid the Service
Organizations fees at the annual rate of 0.50% of each Fund's average daily net
assets attributable to Service Shares.
 
 
                            REPORTS TO SHAREHOLDERS
 
 
  Recordholders of Service Shares of the Funds will receive an annual report
containing audited financial statements and a semi-annual report. Each
recordholder of Service Shares will also be provided with a printed confirma-
tion for each transaction in its account and a quarterly account statement. A
year-to-date statement for any account will be provided to a Service Organiza-
tion upon request made to Goldman Sachs.
 
                                       41
<PAGE>
 
 
  Service Organizations will be responsible for providing services similar to
those described above to their customers who are the beneficial owners of such
Shares. For example, Service Organizations are responsible for providing each
customer exercising investment discretion with quarterly statements with re-
spect to such customer's account in lieu of an immediate confirmation of each
transaction.
 
 
                                   DIVIDENDS
 
 
  Each dividend from net investment income and capital gain distributions, if
any, declared by a Fund on its outstanding Service Shares will, at the election
of each shareholder, be paid: (i) in cash; or (ii) in additional Service Shares
of such Fund. This election should initially be made on a shareholder's Account
Information Form and may be changed upon written notice to Goldman Sachs at any
time prior to the record date for a particular dividend or distribution. If no
election is made, all dividends from net investment income and capital gain
distributions will be reinvested in Service Shares of the applicable Fund.
 
  The election to reinvest dividends and distributions paid by a Fund in addi-
tional Service Shares of the Fund will not affect the tax treatment of such
dividends and distributions, which will be treated as received by the share-
holder and then used to purchase Service Shares of a Fund.
 
  Each Fund intends that all or substantially all its net investment income and
net capital gains, after reduction by available capital losses, including any
capital losses carried forward from prior years, will be declared as dividends
for each taxable year. The Balanced and Growth and Income Funds will pay
dividends from net investment income quarterly. Each other Fund will pay
dividends from net investment income, and dividends from net realized capital
gains, reduced by available capital losses, at least annually. From time to
time, a portion of a Fund's dividends may constitute a return of capital.
 
  At the time of an investor's purchase of Shares of a Fund a portion of the
NAV per Share may be represented by undistributed income of the Fund or real-
ized or unrealized appreciation of the Fund's portfolio securities. Therefore,
subsequent distributions on such Shares from such income or realized apprecia-
tion may be taxable to the investor even if the NAV of the investor's Shares
is, as a result of the distributions, reduced below the cost of such Shares and
the distributions (or portions thereof) represent a return of a portion of the
purchase price.
 
 
                           PURCHASE OF SERVICE SHARES
 
 
  Customers of Service Organizations may invest in Service Shares only through
their Service Organizations. Service Shares may be purchased on any Business
Day at the NAV per Share next determined after receipt of an order by Goldman
Sachs from a Service Organization. (See "Additional Services" for a description
of limited situations where a Service Organization or other intermediary may be
authorized to accept orders for the Funds.) No sales load will be charged. Cur-
rently, the NAV is determined as of the close of regular trading on the New
York Stock Exchange (which is normally, but not always, 3:00 p.m. Chicago time,
4:00 p.m. New York time), as described under "Net Asset Value." Purchases of
Service Shares of the Funds must be settled within three (3) Business Days of
the receipt of a complete purchase order. Payment of the proceeds of redemption
of Shares purchased by check may be delayed for a period of time as described
under "Redemption of Service Shares."
 
                                       42
<PAGE>
 
 
  The Service Organizations are responsible for the timely transmittal of
purchase orders to Goldman Sachs and payments to State Street Bank and Trust
Company ("State Street"). In order to facilitate timely transmittal, the
Service Organizations have established times by which purchase orders and
payments must be received by them.
 
PURCHASE PROCEDURES
 
  Purchases of Service Shares may be made by a Service Organization placing an
order with Goldman Sachs at 800-621-2550 and either wiring federal funds to
State Street or initiating an ACH transfer. Purchases may also be made by a
Service Organization by check (except that the Trust will not accept a check
drawn on a foreign bank or a third party check) or Federal Reserve draft made
payable to "Goldman Sachs Domestic Equity Funds--Name of Fund and Class of
Shares" and should be directed to "Goldman Sachs Domestic Equity Funds--Name of
Fund and Class of Shares," c/o National Financial Data Services, Inc. ("NFDS"),
P.O. Box 419711, Kansas City, MO 64141-6711.
 
OTHER PURCHASE INFORMATION
 
  The Funds do not have any minimum purchase or account requirements with
respect to Service Shares. A Service Organization may, however, impose a
minimum amount for initial and subsequent investments in Service Shares, and
may establish other requirements such as a minimum account balance. A Service
Organization may effect redemptions of noncomplying accounts, and may impose a
charge for any special services rendered to its customers. Customers should
contact their Service Organization for further information concerning such
requirements and charges.
 
  The Investment Adviser, Distributor, and/or their affiliates also pay
additional compensation, from time to time, out of their assets and not as an
additional charge to the Funds, to selected Service Organizations and other
persons in connection with the sale of Shares of the Funds and other investment
portfolios of the Trust (such as additional payments based on new sales amounts
exceeding pre-established thresholds, or the length of time customer assets
have remained in the Trust) and, subject to applicable NASD regulations,
contribute to various non-cash and cash incentive arrangements to promote the
sale of Shares, as well as sponsor various educational programs, sales contests
and/or promotions in which participants may receive reimbursement of expenses,
entertainment and prizes such as travel awards, merchandise, cash, investment
research and educational information and related support materials. This
additional compensation can vary among Service Organizations depending upon
such factors as the amounts their customers have invested (or may invest) in
particular investment portfolios of the Trust, the particular program involved,
or the amount of reimbursable expenses. Additional compensation based on sales
may, but is currently not expected to, exceed 0.50% (annualized) of the amount
invested. For further information, see the Additional Statement.
 
  The Funds reserve the right to redeem Service Shares of any Service Organiza-
tion whose account balance is less than $50 as a result of earlier redemptions.
Such redemptions will not be implemented if the value of a recordholder's ac-
count falls below the minimum account balance solely as a result of market con-
ditions. The Trust will give 60 days' prior written notice to Service Organiza-
tions whose Service Shares are being redeemed to allow them to purchase suffi-
cient additional Service Shares to avoid such redemption.
 
  The Funds and Goldman Sachs each reserve the right to reject any specific
purchase order (including exchanges) or to restrict purchases or exchanges by a
particular purchaser (or group of related purchasers). This
 
                                       43
<PAGE>
 
may occur, for example, when a purchaser or group of purchaser's pattern of
frequent purchases, sales or exchanges of Service Shares of a Fund is evident,
or if purchases, sales, or exchanges are, or a subsequent abrupt redemption
might be, of a size that would disrupt management of a Fund.
 
  In the sole discretion of Goldman Sachs, a Fund may accept securities instead
of cash for the purchase of Shares of the Fund. Such purchases will be
permitted only if the Investment Adviser determines that any securities
acquired in this manner are consistent with the Fund's investment objectives,
restrictions and policies and are desirable investments for the Fund.
 
 
                               EXCHANGE PRIVILEGE
 
 
  Service Shares of the Funds may be exchanged by a Service Organization for:
(i) Service Shares of any other mutual fund sponsored by Goldman Sachs and des-
ignated as an eligible fund for this purpose; and (ii) the corresponding class
of any Goldman Sachs Money Market Fund at the NAV next determined either by
writing to Goldman Sachs, Attention: Goldman Sachs Domestic Equity Funds--Name
of Fund and Class of Shares, c/o GSAM Shareholder Services, 4900 Sears Tower,
Chicago, Illinois 60606 or, if previously elected in the Fund's Account Infor-
mation Form, by telephone at 800-621-2550 (7:00 a.m. to 5:30 p.m. Chicago
time). A shareholder should obtain and read the prospectus relating to any
other fund and its Shares and consider its investment objective, policies and
applicable fees before making an exchange. Service Shares acquired by telephone
exchange must be registered in the same name(s) and have the same address as
Service Shares of the Fund for which the exchange is being made.
 
   In an effort to prevent unauthorized or fraudulent exchanges by telephone,
Goldman Sachs employs reasonable procedures as set forth under "Redemption of
Service Shares" to confirm that such instructions are genuine. In times of
drastic economic or market changes the telephone exchange privilege may be dif-
ficult to implement. For federal income tax purposes, an exchange is treated as
a sale of the Service Shares surrendered in the exchange, on which an investor
may realize a gain or loss, followed by a purchase of Service Shares or the
corresponding class of any Goldman Sachs Money Market Fund received in the ex-
change. Shareholders should consult their own tax advisers concerning the tax
consequences of an exchange. Exchanges are available only in states where ex-
changes may legally be made. The exchange privilege may be materially modified
or withdrawn at any time on 60 days' written notice to recordholders of Service
Shares and is subject to certain limitations. See "Purchase of Service Shares."
 
 
                          REDEMPTION OF SERVICE SHARES
 
 
  The Funds will redeem their Service Shares upon request of a recordholder of
such Shares on any Business Day at the NAV next determined after the receipt of
a request in proper form by Goldman Sachs. (See "Additional Services" for a de-
scription of limited situations where a Service Organization or other interme-
diary may be authorized to accept requests for the Funds.) If Service Shares to
be redeemed were recently purchased by check, a Fund may delay transmittal of
redemption proceeds until such time as it has assured itself that good funds
have been collected for the purchase of such Service Shares. This may take up
to 15 days. Redemption
 
                                       44
<PAGE>
 
requests may be made by a Service Organization by writing to or calling the
Transfer Agent at the address or telephone number set forth on the back cover
of this Prospectus. A Service Organization may request redemptions by telephone
if the optional telephone redemption privilege is elected on the Account Infor-
mation Form. It may be difficult to implement redemptions by telephone in times
of drastic economic or market changes.
 
   In an effort to prevent unauthorized or fraudulent redemption or exchange
requests by telephone, Goldman Sachs employs reasonable procedures specified by
the Trust to confirm that such instructions are genuine. Among other things,
any redemption request that requires money to go to an account or address other
than that designated on the Account Information Form must be in writing and
signed by an authorized person designated on the Account Information Form. Any
such written request is also confirmed by telephone with both the requesting
party and the designated bank account to verify instructions. Exchanges among
accounts with different names, addresses and social security or other taxpayer
identification numbers must be in writing and signed by an authorized person
designated on the Account Information Form. Other procedures may be implemented
from time to time concerning telephone redemptions and exchanges. If reasonable
procedures are not implemented, the Trust may be liable for any loss due to
unauthorized or fraudulent transactions. In all other cases, neither the Funds,
the Trust nor Goldman Sachs will be responsible for the authenticity of
redemption or exchange instructions received by telephone.
 
  The Funds will arrange for the proceeds of redemptions effected by any means
to be wired to the recordholder of Service Shares or, if the recordholder
elects in writing, by check. Redemption proceeds paid by wire transfer will
normally be wired on the next Business Day in federal funds (for a total one-
day delay), but may be paid up to three days after receipt of a properly
executed redemption request. Wiring of redemption proceeds may be delayed one
additional Business Day if the Federal Reserve Bank is closed on the day
redemption proceeds would ordinarily be wired. Redemption proceeds paid by
check will normally be mailed to the address of record within three Business
Days of receipt of a properly executed redemption request. Once wire transfer
instructions have been given by Goldman Sachs, neither the Funds, the Trust nor
Goldman Sachs assumes any further responsibility for the performance of
intermediaries or the customer's Service Organization in the transfer process.
If a problem with such performance arises, the customer should deal directly
with such intermediaries or Service Organizations.
 
  Additional documentation regarding a redemption by any means may be required
to effect a redemption when deemed appropriate by the Transfer Agent. The
request for such redemption will not be considered to have been received in
proper form until such additional documentation has been submitted to the
Transfer Agent by the recordholder of Service Shares.
 
  Service Organizations are responsible for the timely transmittal of
redemption requests by their customers to the Transfer Agent. In order to
facilitate timely transmittal of redemption requests, Service Organizations
have established times by which redemption requests must be received by them.
Additional documentation may be required when deemed appropriate by a Service
Organization.
 
                              --------------------
 
                                       45
<PAGE>
 
 
                                  APPENDIX
 
 
 
   GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON ACCOUNT
                               INFORMATION FORM
 
  You are required by law to provide a Fund with your correct Taxpayer
Identification Number (TIN), regardless of whether you file tax returns.
Failure to do so may subject you to penalties. Failure to provide your correct
TIN and to sign your name in the Certification section of the Account
Information Form could result in withholding of 31% by a Fund for the federal
backup withholding tax on distributions, redemptions, exchanges and other
payments relating to your account.
 
  Any tax withheld may be credited against taxes owed on your federal income
tax return.
 
  If you do not have a TIN, you should apply for one immediately by contacting
your local office of the Social Security Administration or the Internal
Revenue Service (IRS). Backup withholding could also apply to payments
relating to your account prior to a Fund's receipt of your TIN.
 
  Special rules apply for certain entities. For example, for an account
established under a Uniform Gifts or Transfers to Minors Act, the TIN of the
minor should be furnished.
 
  If you have been notified by the IRS that you are subject to backup
withholding because you failed to report all your interest and/or dividend
income on your tax return and you have not been notified by the IRS that such
withholding should cease, you must cross out item (2) in the Certification
section of the Account Information Form.
 
  If you are an exempt recipient, you should furnish your TIN and certify your
exemption by signing the Certification section and writing "exempt" after your
signature. Exempt recipients include: corporations, tax-exempt pension plans
and IRAs, governmental agencies, financial institutions, registered securities
and commodities dealers and others.
 
  If you are a nonresident alien or foreign entity, you must provide a
completed Form W-8 to a Fund in order to avoid backup withholding on certain
payments. Other payments to you may be subject to nonresident alien
withholding of up to 30%.
 
  For further information regarding backup and nonresident alien withholding,
see Sections 3406, 1441 and 1442 of the Code and consult your tax adviser.
 
                                      A-1
<PAGE>
 
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS ASSET
MANAGEMENT
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN SACHS FUNDS
MANAGEMENT, L.P.
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR
85 BROAD STREET
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
TRANSFER AGENT
4900 SEARS TOWER
CHICAGO, ILLINOIS 60606
 
STATE STREET BANK AND TRUST COMPANY
CUSTODIAN
1776 HERITAGE DRIVE
NORTH QUINCY, MASSACHUSETTS 02171
 
ARTHUR ANDERSEN, LLP
INDEPENDENT PUBLIC ACCOUNTANTS
225 FRANKLIN STREET
BOSTON, MASSACHUSETTS 02110
 
TOLL FREE (IN U.S.) . . . . . . . . 800-621-2550
 
EQDOMPROSVC
501418
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS
DOMESTIC
EQUITY FUNDS
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
 
SERVICE SHARES
 
 
 
LOGO
Goldman
Sachs
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
- --------------------------------------------------------------------------------
PROSPECTUS
 
                      GOLDMAN SACHS DOMESTIC EQUITY FUNDS
May 1, 1998, as revised       INSTITUTIONAL SHARES
September 1, 1998
 
 
GOLDMAN SACHS BALANCED FUND         GOLDMAN SACHS CORE SMALL CAP
 Seeks long-term capital growth     EQUITY FUND
 and current income through in-       Seeks long-term growth of capital
 vestments in equity and fixed        through a broadly diversified portfolio
 income securities.                   of equity securities of U.S. issuers
                                      which are included in the Russell 2000
GOLDMAN SACHS GROWTH AND INCOME       Index at the time of investment.
FUND
 Seeks long-term growth of cap-     GOLDMAN SACHS CAPITAL GROWTH FUND
 ital and growth of income            Seeks long-term growth of capital
 through investments in equity        through diversified investments in eq-
 securities that are considered       uity securities of companies that are
 to have favorable prospects          considered to have long-term capital ap-
 for capital appreciation             preciation potential.
 and/or dividend paying abili-
 ty.                                GOLDMAN SACHS MID CAP EQUITY FUND
                                      Seeks long-term capital appreciation
GOLDMAN SACHS CORE U.S. EQUITY        primarily through investments in equity
FUND                                  securities of companies with public
 Seeks long-term growth of cap-       stock market capitalizations within the
 ital and dividend income             range of the market capitalization of
 through a broadly diversified        companies constituting the Russell
 portfolio of large cap and           Midcap Index at the time of investment
 blue chip equity securities          (currently between $400 million and $16
 representing all major sectors       billion).
 of the U.S. economy.
                                    GOLDMAN SACHS SMALL CAP VALUE FUND
GOLDMAN SACHS CORE LARGE CAP          Seeks long-term capital growth through
GROWTH FUND                           investments in equity securities of com-
 Seeks long-term growth of cap-       panies with public stock market capital-
 ital through a broadly diver-        izations of $1 billion or less at the
 sified portfolio of equity se-       time of investment.
 curities of large cap U.S. is-
 suers that are expected to
 have better prospects for
 earnings growth than the
 growth rate of the general do-
 mestic economy. Dividend in-
 come is a secondary considera-
 tion.
 
                               -----------------
 
 
INSTITUTIONAL SHARES OF THE FUNDS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR
GUARANTEED OR ENDORSED BY, ANY BANK OR OTHER INSURED DEPOSITORY INSTITUTION AND
ARE NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL
RESERVE BOARD OR ANY OTHER GOVERNMENT AGENCY. AN INVESTMENT IN A FUND INVOLVES
INVESTMENT RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
 
                                                        (continued on next page)
<PAGE>
 
(cover continued)
 
  Goldman Sachs Asset Management ("GSAM"), New York, New York, a separate
operating division of Goldman, Sachs & Co. ("Goldman Sachs"), serves as
investment adviser to the Balanced, Growth and Income, CORE Large Cap Growth,
CORE Small Cap Equity, Mid Cap Equity and Small Cap Value (formerly "Small Cap
Equity") Funds. Goldman Sachs Funds Management, L.P. ("GSFM"), New York, New
York, an affiliate of Goldman Sachs, serves as investment adviser to the CORE
U.S. Equity (formerly the "Select Equity Fund") and Capital Growth Funds. GSAM
and GSFM are each referred to in this Prospectus as the "Investment Adviser."
Goldman Sachs serves as each Fund's distributor and transfer agent.
 
  This Prospectus provides information about Goldman Sachs Trust (the "Trust")
and the Funds that a prospective investor should understand before investing.
This Prospectus should be retained for future reference. A Statement of
Additional Information (the "Additional Statement"), dated May 1, 1998, as
revised September 1, 1998, containing further information about the Trust and
the Funds which may be of interest to investors, has been filed with the
Securities and Exchange Commission ("SEC"), is incorporated herein by
reference in its entirety, and may be obtained without charge from Goldman
Sachs by calling the telephone number, or writing to one of the addresses,
listed on the back cover of this Prospectus. The SEC maintains a Web site
(http://www.sec.gov) that contains the Additional Statement and other
information regarding the Trust.
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
Fund Highlights....................    3
Fees and Expenses..................    6
Financial Highlights...............    8
Investment Objectives and Policies.   16
Description of Securities..........   21
Investment Techniques..............   26
Risk Factors.......................   30
Investment Restrictions............   32
Portfolio Turnover.................   32
Management.........................   32
Expenses...........................   37
Net Asset Value....................   37
</TABLE>
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
Performance Information............   38
Shares of the Trust................   38
Taxation...........................   39
Additional Information.............   40
Reports to Shareholders............   41
Dividends..........................   41
Purchase of Institutional Shares...   41
Exchange Privilege.................   44
Redemption of Institutional Shares.   44
Appendix ..........................  A-1
Account Information Form
</TABLE>
 
                                       2
<PAGE>
 
                                FUND HIGHLIGHTS
 
   The following is intended to highlight certain information and is
 qualified in its entirety by the more detailed information contained in
 this Prospectus.
 
  WHAT IS THE GOLDMAN SACHS TRUST?
 
   The Goldman Sachs Trust is an open-end management investment company
 that offers its shares ("Shares") in several investment funds (commonly
 known as mutual funds (the "Funds")). Each Fund pools the monies of
 investors by selling its Shares to the public and investing these monies
 in a portfolio of securities designed to achieve that Fund's stated
 investment objectives.
 
  WHAT ARE THE INVESTMENT OBJECTIVES AND POLICIES OF THE FUNDS?
 
   Each Fund has distinct investment objectives and policies. There can be
 no assurance that a Fund's objectives will be achieved. Each Fund is a
 "diversified open-end management company" as defined in the Investment
 Company Act of 1940, as amended (the "Act"). For a further description of
 each Fund's investment objectives and policies, see "Investment
 Objectives and Policies," "Description of Securities" and "Investment
 Techniques."
 
- --------------------------------------------------------------------------------
<TABLE>
                INVESTMENT
 FUND NAME      OBJECTIVES               INVESTMENT CRITERIA                BENCHMARK
 ----------  ----------------  ---------------------------------------    -------------
<S>          <C>               <C>                                      <C>
 BALANCED    Long-term         Between 45% and 65% of total assets in   Lehman Aggregate
 FUND        capital growth    equity securities and at least 25% in    Bond Index and
             and current       fixed-income senior securities.          the Standard &
             income.                                                    Poor's Index of
                                                                        500 Common
                                                                        Stocks (the "S&P
                                                                        500 Index")
- ----------------------------------------------------------------------------------------
 GROWTH AND  Long-term growth  At least 65% of total assets in equity   S&P 500 Index
 INCOME FUND of capital and    securities that the Investment Adviser
             growth of         considers to have favorable prospects
             income.           for capital appreciation and/or
                               dividend-paying ability.
- ----------------------------------------------------------------------------------------
 CORE U.S.   Long-term growth  At least 90% of total assets in equity   S&P 500 Index
 EQUITY FUND of capital and    securities of U.S. issuers, including
             dividend income.  certain foreign issuers traded in the
                               U.S. The Fund seeks to achieve its
                               objective through a broadly diversified
                               portfolio of large cap and blue chip
                               equity securities representing all
                               major sectors of the U.S. economy. The
                               Fund's investments are selected using
                               both a variety of quantitative
                               techniques and fundamental research in
                               seeking to maximize the Fund's
                               expected return, while maintaining
                               risk, style, capitalization and
                               industry characteristics similar to the
                               S&P 500 Index.
- ----------------------------------------------------------------------------------------
 CORE LARGE  Long-term growth  At least 90% of total assets in equity   Russell 1000
 CAP GROWTH  of capital.       securities of U.S. issuers, including    Growth Index
 FUND        Dividend income   certain foreign issuers traded in the
             is a secondary    U.S. The Fund seeks to achieve its
             consideration.    objective through a broadly diversified
                               portfolio of equity securities of large
                               cap U.S. issuers that are expected to
                               have better prospects for earnings
                               growth than the growth rate of the
                               general domestic economy. The Fund's
                               investments are selected using both a
                               variety of quantitative techniques and
                               fundamental research in seeking to
                               maximize the Fund's expected returns,
                               while maintaining risk, style,
                               capitalization and industry
                               characteristics similar to the Russell
                               1000 Growth Index.
- ----------------------------------------------------------------------------------------
</TABLE>
                                                                     (continued)
 
                                       3
<PAGE>
 
<TABLE>

                INVESTMENT
 FUND NAME      OBJECTIVES               INVESTMENT CRITERIA                BENCHMARK
- -----------  ----------------  ---------------------------------------    ------------
<S>          <C>               <C>                                      <C>
 CORE SMALL  Long-term growth  At least 90% of total assets in equity   Russell 2000
 CAP EQUITY  of capital.       securities of U.S. issuers, including    Index
 FUND                          certain foreign issuers traded in the
                               U.S. The Fund seeks to achieve its
                               investment objective through a broadly
                               diversified portfolio of equity
                               securities of U.S. issuers which are
                               included in the Russell 2000 Index at
                               the time of investment. The Fund's
                               investments are selected using both a
                               variety of quantitative techniques and
                               fundamental research in seeking to
                               maximize the Fund's expected return,
                               while maintaining risk, style,
                               capitalization and industry
                               characteristics similar to the Russell
                               2000 Index.
- --------------------------------------------------------------------------------------
 CAPITAL     Long-term         At least 90% of total assets in a        S&P 500 Index
 GROWTH FUND capital growth.   diversified portfolio of equity
                               securities. The Investment Adviser
                               considers long-term capital
                               appreciation potential in selecting
                               investments.
- --------------------------------------------------------------------------------------
 MID CAP     Long-term         At least 65% of total assets in          Russell Midcap
 EQUITY FUND capital           equity securities of companies with      Index
             appreciation.     public stock market capitalizations
                               within the range of the market
                               capitalization of companies
                               constituting the Russell Midcap Index
                               at the time of investment (currently
                               between $400 million and $16 billion)
                               ("Mid-Cap Companies").
- --------------------------------------------------------------------------------------
 SMALL CAP   Long-term         At least 65% of total assets in equity   Russell 2000
 VALUE FUND  capital growth.   securities of companies with public
                               stock market capitalizations of $1
                               billion or less at the time of
                               investment.
</TABLE>
 
 
 WHAT ARE THE RISK FACTORS AND SPECIAL CHARACTERISTICS THAT I SHOULD CONSIDER
 BEFORE INVESTING?
 
  Each Fund's Share price will fluctuate with market, economic and, to the
extent applicable, foreign exchange conditions, so that an investment in
any of the Funds may be worth more or less when redeemed than when
purchased. None of the Funds should be relied upon as a complete investment
program. There can be no assurance that a Fund's investment objectives will
be achieved. See "Risk Factors."
 
  Risks of Investing in Small Capitalization Companies. To the extent that
a Fund invests in the securities of small market capitalization companies,
the Fund may be exposed to a higher degree of risk and price volatility.
Securities of such issuers may lack sufficient market liquidity to enable a
Fund to effect sales at an advantageous time or without a substantial drop
in price.
 
  Foreign Risks. Investments in securities of foreign issuers and
currencies involve risks that are different from those associated with
investments in domestic securities. The risks associated with foreign
investments and currencies include changes in relative currency exchange
rates, political and economic developments, the imposition of exchange
controls, confiscation and other governmental restrictions. Generally,
there is less availability of data on foreign companies and securities
markets as well as less regulation of foreign stock exchanges, brokers and
issuers. A Fund's investments in emerging markets and countries ("Emerging
Countries") involves greater risks than investments in the developed
countries of Western Europe, the United States, Canada, Australia, New
Zealand and Japan.
 
  Other. A Fund's use of certain investment techniques, including
derivatives, forward contracts, options and futures, will subject the Fund
to greater risk than funds that do not employ such techniques.
 
 
                                       4
<PAGE>
 
 WHO MANAGES THE FUNDS?
 
   Goldman Sachs Asset Management serves as Investment Adviser to the
 Balanced, Growth and Income, CORE Large Cap Growth, CORE Small Cap
 Equity, Mid Cap Equity and Small Cap Value Funds. Goldman Sachs Funds
 Management, L.P. serves as Investment Adviser to the CORE U.S. Equity and
 Capital Growth Funds. As of July 24, 1998, the Investment Adviser,
 together with its affiliates, acted as investment adviser or distributor
 for assets in excess of $168 billion.
 
 WHO DISTRIBUTES THE FUNDS' SHARES?
 
   Goldman Sachs acts as distributor of each Fund's Shares (the
 "Distributor").
 
 WHAT IS THE MINIMUM INVESTMENT?
 
  The minimum initial investment is $1,000,000 or $10,000,000 (depending
upon an investor's eligibility) in Institutional Shares of a Fund alone or
in combination with Institutional Shares (or the corresponding class) of
any other mutual fund sponsored by Goldman Sachs and designated as an
eligible fund for this purpose.
 
 HOW DO I PURCHASE INSTITUTIONAL SHARES?
 
  You may purchase Institutional Shares of the Funds through Goldman Sachs.
Institutional Shares are purchased at the current net asset value ("NAV")
without any sales load. See "Purchase of Institutional Shares."
 
 HOW DO I SELL MY INSTITUTIONAL SHARES?
 
  You may redeem Institutional Shares upon request on any Business Day, as
defined under "Additional Information," at the NAV next determined after
receipt of such request in proper form. See "Redemption of Institutional
Shares."
 
 HOW DO I RECEIVE DIVIDENDS AND DISTRIBUTIONS?
 
 
<TABLE>
<CAPTION>
                                       INVESTMENT INCOME DIVIDENDS
                                       --------------------------- CAPITAL GAINS
FUND                                        DECLARED AND PAID      DISTRIBUTIONS
- ----                                        -----------------      -------------
<S>                                    <C>                         <C>
Balanced..............................          Quarterly            Annually
Growth and Income.....................          Quarterly            Annually
CORE U.S. Equity......................           Annually            Annually
CORE Large Cap Growth.................           Annually            Annually
CORE Small Cap Equity.................           Annually            Annually
Capital Growth........................           Annually            Annually
Mid Cap Equity........................           Annually            Annually
Small Cap Value.......................           Annually            Annually
</TABLE>
 
  Recordholders of Institutional Shares may receive dividends and
distributions in additional Institutional Shares of the Fund in which they
have invested or may elect to receive them in cash. For further information
concerning dividends and distributions, see "Dividends."
 
                                       5
<PAGE>
 
                             FEES AND EXPENSES
                           (INSTITUTIONAL SHARES)
 
<TABLE>
<CAPTION>
                                                     CORE   CORE
                                   GROWTH           LARGE  SMALL           MID   SMALL
                                    AND   CORE U.S.  CAP    CAP   CAPITAL  CAP    CAP
                          BALANCED INCOME  EQUITY   GROWTH EQUITY GROWTH  EQUITY VALUE
                            FUND    FUND    FUND     FUND   FUND   FUND    FUND  FUND
                          -------- ------ --------- ------ ------ ------- ------ -----
<S>                       <C>      <C>    <C>       <C>    <C>    <C>     <C>    <C>
SHAREHOLDER TRANSACTION
 EXPENSES:
 Maximum Sales Charge
  Imposed on Purchases..    None    None    None     None   None   None    None  None
 Maximum Sales Charge
  Imposed on Reinvested
  Dividends.............    None    None    None     None   None   None    None  None
 Redemption Fees........    None    None    None     None   None   None    None  None
 Exchange Fees..........    None    None    None     None   None   None    None  None
ANNUAL FUND OPERATING
 EXPENSES:
 (as a percentage of
 average daily net
 assets)/1/
 Management Fees (after
  applicable
  limitations)/2/.......    0.65%   0.70%   0.70%    0.60%  0.85%  1.00%   0.75% 1.00%
 Distribution Fees......    None    None    None     None   None   None    None  None
 Other Expenses (after
  applicable
  limitations)/3/.......    0.05%   0.09%   0.04%    0.04%  0.08%  0.04%   0.14% 0.10%
                            ----    ----    ----     ----   ----   ----    ----  ----
TOTAL FUND OPERATING
 EXPENSES (AFTER FEE AND
 EXPENSE
 LIMITATIONS)/4/........    0.70%   0.79%   0.74%    0.64%  0.93%  1.04%   0.89% 1.10%
                            ====    ====    ====     ====   ====   ====    ====  ====
</TABLE>
- --------------------
/1/ The Funds' annual operating expenses have been restated to reflect fees and
    expenses in effect as of September 1, 1998.
/2/ The Investment Adviser has voluntarily agreed not to impose a portion of
    the management fee on the CORE U.S. Equity and CORE Large Cap Growth Funds
    equal to 0.05% and 0.15%, respectively. Without such limitations,
    management fees would be 0.75% of each Fund's average daily net assets.
/3/ The Investment Adviser has voluntarily agreed to reduce or limit certain
    other expenses (excluding management fees, transfer agency fees (equal to
    0.04% of the average daily net assets of each Fund's Institutional Shares),
    taxes, interest and brokerage fees and litigation, indemnification and
    other extraordinary expenses) for each Fund to the extent such expenses
    exceed the following percentages of average daily net assets:
<TABLE>
<CAPTION>
                                                                         OTHER
                                                                        EXPENSES
                                                                        --------
      <S>                                                               <C>
      Balanced.........................................................   0.01%
      Growth and Income................................................   0.05%
      CORE U.S. Equity.................................................   0.00%
      CORE Large Cap Growth............................................   0.00%
      CORE Small Cap Equity............................................   0.04%
      Capital Growth...................................................   0.00%
      Mid Cap Equity...................................................   0.10%
      Small Cap Value..................................................   0.06%
</TABLE>
 
 
/4/ Without the limitations described above, "Other Expenses" and "Total
    Operating Expenses" of the Institutional Shares of the Funds would be as
    set forth below:
<TABLE>
<CAPTION>
                                                                         TOTAL
                                                               OTHER   OPERATING
                                                              EXPENSES EXPENSES
                                                              -------- ---------
      <S>                                                     <C>      <C>
      Balanced...............................................   0.28%    0.93%
      Growth and Income......................................   0.12%    0.82%
      CORE U.S. Equity.......................................   0.12%    0.87%
      CORE Large Cap Growth..................................   0.22%    0.97%
      CORE Small Cap Equity..................................   0.48%    1.33%
      Capital Growth.........................................   0.10%    1.10%
      Mid Cap Equity.........................................   0.16%    0.91%
      Small Cap Value........................................   0.13%    1.13%
</TABLE>
 
                                       6
<PAGE>
 
<TABLE>
<CAPTION>
EXAMPLE:                                       1 YEAR 3 YEARS 5 YEARS 10 YEARS
- --------                                       ------ ------- ------- --------
<S>                                            <C>    <C>     <C>     <C>
You would pay the following expenses on a hy-
 pothetical $1,000 investment, assuming (1) a
 5% annual return and (2) redemption at the
 end of each time period:
Balanced......................................  $ 7     $22     $39     $87
Growth and Income.............................    8      25      44      98
CORE U.S. Equity..............................    8      24      41      92
CORE Large Cap Growth.........................    7      20      36      80
CORE Small Cap Equity.........................    9      30      51     114
Capital Growth................................   11      33      57     127
Mid Cap Equity................................    9      28      49     110
Small Cap Value...............................   11      35      61     134
</TABLE>
 
  The Investment Adviser and Goldman Sachs may modify or discontinue any of
the limitations set forth above in the future at their discretion. The
information set forth in the foregoing table and hypothetical example relates
only to Institutional Shares of the Funds. Each Fund also offers Service
Shares and Class A, Class B and Class C Shares, which are subject to different
fees and expenses (which affect performance), have different minimum
investment requirements and are entitled to different services. Information
regarding Service, Class A, Class B and Class C Shares may be obtained from an
investor's sales representative or from Goldman Sachs by calling the number on
the back cover of this Prospectus.
 
  Institutions that invest in Institutional Shares on behalf of their
customers may charge fees directly to their customer accounts in connection
with their investments. Such fees, if any, may affect the return such
customers realize with respect to their investments.
 
  Certain institutions may also receive other compensation in connection with
the sales and distribution of Institutional Shares or for services to their
customer's accounts and/or the Funds. For additional information regarding
such compensation, see "Purchase of Institutional Shares" in the Prospectus
and the Additional Statement.
 
  The purpose of the foregoing table is to assist investors in understanding
the various fees and expenses of a Fund that an investor will bear directly or
indirectly. The information on the fees and expenses included in the table and
hypothetical example above are based on each Fund's fees and expenses (actual
or estimated) and should not be considered as representative of past or future
expenses. Actual fees and expenses may be greater or less than those
indicated. Moreover, while the example assumes a 5% annual return, a Fund's
actual performance will vary and may result in an actual return greater or
less than 5%. See "Management--Investment Advisers."
 
                                       7
<PAGE>
 
 
                             FINANCIAL HIGHLIGHTS
 
 
         SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD
 
  The following data have been audited by Arthur Andersen LLP, independent
public accountants, as indicated in their report incorporated by reference
into the Additional Statement from the Annual Report to shareholders of the
Funds for the year ended January 31, 1998 (the "Annual Report"). This
information should be read in conjunction with the financial statements and
related notes incorporated by reference and attached to the Additional
Statement. The Annual Report also contains performance information and is
available upon request and without charge by calling the telephone number or
writing to one of the addresses on the back cover of this Prospectus.
 
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                  INCOME FROM                        DISTRIBUTIONS TO
                           INVESTMENT OPERATIONS(E)                    SHAREHOLDERS
                           ------------------------- ------------------------------------------------
                                       NET REALIZED                                      IN EXCESS OF
                                      AND UNREALIZED                         FROM NET    NET REALIZED     NET
                 NET ASSET               GAIN ON        FROM    IN EXCESS  REALIZED GAIN   GAIN ON     INCREASE   NET ASSET
                  VALUE,      NET       INVESTMENT      NET       OF NET   ON INVESTMENT  INVESTMENT  (DECREASE)   VALUE,
                 BEGINNING INVESTMENT  AND FUTURES   INVESTMENT INVESTMENT  AND FUTURES  AND FUTURES    IN NET     END OF
                 OF PERIOD   INCOME    TRANSACTIONS    INCOME     INCOME   TRANSACTIONS  TRANSACTIONS ASSET VALUE  PERIOD
                 --------- ---------- -------------- ---------- ---------- ------------- ------------ ----------- ---------
                                                                                                             BALANCED FUND
- ---------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>        <C>        <C>           <C>          <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $18.78     $0.57        $2.66        $(0.56)    $ --        $(1.16)       $ --         $1.51     $20.29
1998--Class B
Shares..........   18.73      0.50         2.57         (0.42)    (0.02)       (1.16)         --          1.47      20.20
1998--Class C
Shares(b).......   21.10      0.25         0.24         (0.22)    (0.04)       (0.64)       (0.52)       (0.93)     20.17
1998--Institu-
tional
Shares(b).......   21.18      0.26         0.32         (0.23)    (0.08)       (0.45)       (0.71)       (0.89)     20.29
1998--Service
Shares(b).......   21.18      0.22         0.32         (0.22)    (0.06)       (0.72)       (0.44)       (0.90)     20.28
- ---------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   17.31      0.66         2.47         (0.66)      --         (1.00)         --          1.47      18.78
1997--Class B
Shares(b).......   17.46      0.42         2.34         (0.42)    (0.07)       (1.00)         --          1.27      18.73
- ---------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   14.22      0.51         3.43         (0.50)      --         (0.35)         --          3.09      17.31
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1995--Class A
Shares(b).......   14.18      0.10         0.02         (0.08)      --           --           --          0.04      14.22
<CAPTION>
                                                                                        RATIOS ASSUMING
                                                                                      NO VOLUNTARY WAIVER
                                                                                           OF FEES OR
                                                                                      EXPENSE LIMITATIONS
                                                                                    ------------------------
                                                                         RATIO OF                RATIO OF
                                                    NET      RATIO OF       NET                     NET
                                                 ASSETS AT      NET     INVESTMENT   RATIO OF   INVESTMENT
                            PORTFOLIO  AVERAGE     END OF   EXPENSES TO  INCOME TO   EXPENSES  INCOME (LOSS)
                   TOTAL    TURNOVER  COMMISSION   PERIOD   AVERAGE NET AVERAGE NET TO AVERAGE  TO AVERAGE
                 RETURN(A)   RATE(G)   RATE(F)   (IN 000'S)   ASSETS      ASSETS    NET ASSETS  NET ASSETS
                 ---------- --------- ---------- ---------- ----------- ----------- ---------- -------------
- ---------------------------------------------------------------------------------------------------------------------------
<S>              <C>        <C>       <C>        <C>        <C>         <C>         <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........   17.54%    190.43%    $.0590    $163,636     1.00%       2.94%       1.57%        2.37%
1998--Class B
Shares..........   16.71     190.43      .0590      23,639     1.76        2.14        2.07         1.83
1998--Class C
Shares(b).......    2.49(d)  190.43      .0590       8,850     1.77(c)     2.13(c)     2.08(c)      1.82(c)
1998--Institu-
tional
Shares(b).......    2.93(d)  190.43      .0590       8,367     0.76(c)     3.13(c)     1.07(c)      2.82(c)
1998--Service
Shares(b).......    2.66(d)  190.43      .0590          16     1.26(c)     2.58(c)     1.57(c)      2.27(c)
- ---------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   18.59     208.11      .0587      81,410     1.00        3.76        1.77         2.99
1997--Class B
Shares(b).......   16.22(d)  208.11      .0587       2,110     1.75(c)     2.59(c)     2.27(c)      2.07(c)
- ---------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   28.10     197.10        --       50,928     1.00        3.65        1.90         2.75
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1995--Class A
Shares(b).......    0.87(d)   14.71        --        7,510     1.00(c)     3.39(c)     8.29(c)     (3.90)(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the
    investment at the NAV at the end of the period and no sales or redemption
    charges. Total return would be reduced if a sales or redemption charge
    were taken into account.
(b) Class A and Class B Share activity commenced on October 12, 1994 and May
    1, 1996, respectively. Class C, Institutional and Service Share activity
    commenced on August 15, 1997.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a Fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
(g) Includes the effect of mortgage dollar roll transactions.
 
 
                                       8
<PAGE>
 
<TABLE>
<CAPTION>
                                INCOME (LOSS)
                               FROM INVESTMENT
                                OPERATIONS(E)                DISTRIBUTIONS TO SHAREHOLDERS
                           ------------------------ ------------------------------------------------
                                           NET                                          IN EXCESS OF
                                       REALIZED AND                         FROM NET    NET REALIZED                 NET
                 NET ASSET    NET       UNREALIZED     FROM    IN EXCESS  REALIZED GAIN   GAIN ON                 INCREASE
                  VALUE,   INVESTMENT    GAIN ON       NET       OF NET   ON INVESTMENT  INVESTMENT  ADDITIONAL  (DECREASE)
                 BEGINNING   INCOME    INVESTMENTS  INVESTMENT INVESTMENT  AND FUTURES  AND FUTURES   PAID-IN      IN NET
                 OF PERIOD   (LOSS)    AND FUTURES    INCOME     INCOME   TRANSACTIONS  TRANSACTIONS  CAPITAL    ASSET VALUE
                 --------- ----------  ------------ ---------- ---------- ------------- ------------ ----------  -----------
                                                                                            GROWTH AND INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>         <C>          <C>        <C>        <C>           <C>          <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $23.18     $0.11        $5.27       $(0.11)    $  --       $(2.52)       $  --       $ --         $2.75
1998--Class B
Shares..........   23.10      0.04         5.14          --       (0.03)      (2.45)        (0.07)       --          2.63
1998--Class C
Shares(b).......   28.20     (0.01)        0.06          --       (0.03)      (1.42)        (1.10)       --         (2.50)
1998--
Institutional
Shares..........   23.19      0.27         5.23        (0.22)       --        (0.24)        (2.28)       --          2.76
1998--Service
Shares..........   23.17      0.14         5.23        (0.06)     (0.04)      (2.52)          --         --          2.75
- ----------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   19.98      0.35         5.18        (0.35)     (0.01)      (1.97)          --         --          3.20
1997--Class B
Shares(b).......   20.82      0.17         4.31        (0.17)     (0.06)      (1.97)          --         --          2.28
1997--Institu-
tional
Shares(b).......   21.25      0.29         3.96        (0.30)     (0.04)      (1.97)          --         --          1.94
1997--Service
Shares(b).......   20.71      0.28         4.50        (0.28)     (0.07)      (1.97)          --         --          2.46
- ----------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   15.80      0.33         4.75        (0.30)       --        (0.60)          --         --          4.18
- ----------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   15.79      0.20(g)      0.30(g)     (0.20)     (0.07)      (0.33)          --        0.11(g)      0.01
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1994--Class A
Shares(b).......   14.18      0.15         1.68        (0.15)     (0.01)      (0.06)          --         --          1.61
<CAPTION>
                                                                                                     RATIOS ASSUMING
                                                                                                   NO VOLUNTARY WAIVER
                                                                                                       OF FEES OR
                                                                                                   EXPENSE LIMITATIONS
                                                                                                -------------------------
                                                                                      RATIO
                                                                                     OF NET                     RATIO
                                                              NET        RATIO     INVESTMENT                  OF NET
                 NET ASSET                                 ASSETS AT    OF NET    INCOME (LOSS)    RATIO     INVESTMENT
                  VALUE,              PORTFOLIO  AVERAGE     END OF   EXPENSES TO  TO AVERAGE   OF EXPENSES INCOME (LOSS)
                  END OF     TOTAL    TURNOVER  COMMISSION   PERIOD   AVERAGE NET      NET      TO AVERAGE   TO AVERAGE
                  PERIOD   RETURN(A)    RATE     RATE(F)   (IN 000S)    ASSETS       ASSETS     NET ASSETS   NET ASSETS
                 --------- ---------- --------- ---------- ---------- ----------- ------------- ----------- -------------
- ----------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>       <C>        <C>        <C>         <C>           <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $25.93     23.71%     61.95%    $.0590   $1,216,582    1.25%         0.43%       1.42%         0.26%
1998--Class B
Shares..........   25.73     22.87      61.95      .0590      307,815    1.94         (0.35)       1.94         (0.35)
1998--Class C
Shares(b).......   25.70      0.51(d)   61.95      .0590       31,686    1.99(c)      (0.48)(c)    1.99(c)      (0.48)(c)
1998--
Institutional
Shares..........   25.95     24.24      61.95      .0590       36.225    0.83          0.76        0.83          0.76
1998--Service
Shares..........   25.92     23.63      61.95      .0590        8,893    1.32          0.32        1.32          0.32
- ----------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   23.18     28.42      53.03      .0586      615,103    1.22          1.60        1.43%         1.39%
1997--Class B
Shares(b).......   23.10     22.23(d)   53.03      .0586       17,346    1.93(c)       0.15(c)     1.93(c)       0.15(c)
1997--Institu-
tional
Shares(b).......   23.19     20.77(d)   53.03      .0586          193    0.82(c)       1.36(c)     0.82(c)       1.36(c)
1997--Service
Shares(b).......   23.17     23.87(d)   53.03      .0586        3,174    1.32(c)       0.94(c)     1.32(c)       0.94(c)
- ----------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   19.98     32.45      57.93        --       436,757    1.20          1.67        1.45          1.42
- ----------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   15.80      3.97      71.80        --       193,772    1.25          1.28        1.58          0.95
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1994--Class A
Shares(b).......   15.79     13.08(d)  102.23        --        41,528    1.25(c)       1.23(c)     3.24(c)      (0.76)(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the
    investment at the NAV at the end of the period and no sales or redemption
    charges. Total return would be reduced if a sales or redemption charge
    were taken into account.
(b) Class A, Class B, Class C, Institutional and Service Share activity
    commenced on February 5, 1993, May 1, 1996, August 15, 1997, June 3, 1996
    and March 6, 1996, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a Fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
(g) Calculated based on the average Shares outstanding methodology.
 
 
                                       9
<PAGE>
 
<TABLE>
<CAPTION>
                                  INCOME FROM                       DISTRIBUTIONS TO
                           INVESTMENT OPERATIONS(E)                   SHAREHOLDERS
                           ------------------------- -----------------------------------------------
                                                                             FROM NET   IN EXCESS OF    NET
                                       NET REALIZED                          REALIZED   NET REALIZED INCREASE/   NET
                 NET ASSET            AND UNREALIZED            IN EXCESS    GAIN ON      GAIN ON    (DECREASE) ASSET
                  VALUE,      NET     GAIN (LOSS) ON  FROM NET    OF NET    INVESTMENT   INVESTMENT    IN NET   VALUE,
                 BEGINNING INVESTMENT  INVESTMENTS   INVESTMENT INVESTMENT AND FUTURES  AND FUTURES    ASSET    END OF   TOTAL
                 OF PERIOD   INCOME    AND FUTURES     INCOME     INCOME   TRANSACTIONS TRANSACTIONS   VALUE    PERIOD RETURN(A)
                 --------- ---------- -------------- ---------- ---------- ------------ ------------ ---------- ------ ---------
                                                                                                CORE U.S. EQUITY FUND
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>        <C>        <C>          <C>          <C>        <C>    <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $23.32     $0.11        $5.63        $(0.12)    $   --      $(2.35)      $   --      $3.27    $26.59   24.96%
1998--Class B
Shares..........   23.18      0.11         5.44            --      (0.06)      (2.00)        (.35)      3.14     26.32   24.28
1998--Class C
Shares(b).......   27.48      0.03         1.22            --      (0.14)      (0.67)       (1.68)     (1.24)    26.24    4.85(d)
1998--Institu-
tional Shares...   23.44      0.30         5.65         (0.24)      (.01)      (1.33)       (1.02)      3.35     26.79   25.76
1998--Service
Shares..........   23.27      0.19         5.57         (0.07)      (.08)      (2.35)          --       3.26     26.53   25.11
- ---------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   19.66      0.16         4.46         (0.16)        --       (0.80)          --       3.66     23.32   23.75
1997--Class B
Shares(b).......   20.44      0.04         3.70         (0.04)     (0.16)      (0.80)          --       2.74     23.18   18.59(d)
1997--Institu-
tional Shares...   19.71      0.30         4.51         (0.28)        --       (0.80)          --       3.73     23.44   24.63
1997--Service
Shares(b).......   21.02      0.13         3.15         (0.13)     (0.10)      (0.80)          --       2.25     23.27   15.92(d)
- ---------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   14.61      0.19         5.43         (0.16)        --       (0.41)          --       5.05     19.66   38.63
1996--Institu-
tional
Shares(b).......   16.97      0.16         3.23         (0.24)        --       (0.41)          --       2.74     19.71   20.14(d)
- ---------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   15.93      0.20        (0.38)        (0.20)        --       (0.94)          --      (1.32)    14.61   (1.10)
- ---------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   15.46      0.17         2.08         (0.17)        --       (1.61)          --       0.47     15.93   15.12
- ---------------------------------------------------------------------------------------------------------------------------------
1993--Class A
Shares..........   15.05      0.22         0.41         (0.22)        --          --           --       0.41     15.46    4.30
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1992--Class A
Shares(b).......   14.17      0.11         0.88         (0.11)        --          --           --       0.88     15.05    7.01(d)
<CAPTION>
                                                                          RATIOS ASSUMING
                                                                        NO VOLUNTARY WAIVER
                                                                            OF FEES OR
                                                                        EXPENSE LIMITATIONS
                                                                        ----------------------
                                                RATIO OF    RATIO OF               RATIO OF
                                                  NET         NET       RATIO OF     NET
                                         NET    EXPENSES   INVESTMENT   EXPENSES  INVESTMENT
                                      ASSETS AT    TO        INCOME        TO      INCOME
                 PORTFOLIO  AVERAGE    END OF   AVERAGE    (LOSS) TO    AVERAGE   (LOSS) TO
                 TURNOVER  COMMISSION  PERIOD     NET       AVERAGE       NET      AVERAGE
                   RATE     RATE(F)   (IN 000S)  ASSETS    NET ASSETS    ASSETS   NET ASSETS
                 --------- ---------- --------- ---------- ------------ --------- ------------
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>       <C>        <C>          <C>       <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........   65.89%    $.0651   $398,393     1.28%      0.51%       1.47%      0.32%
1998--Class B
Shares..........   65.89      .0651     59,208     1.79      (0.05)       1.96      (0.22)
1998--Class C
Shares(b).......   65.89      .0651      6,267     1.78(c)   (0.21)(c)    1.95(c)   (0.38)(c)
1998--Institu-
tional Shares...   65.89      .0651    202,893     0.65       1.16        0.82       0.99
1998--Service
Shares..........   65.89      .0651      7,841     1.15       0.62        1.32       0.45
- ---------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   37.78      .0417    225,968     1.29       0.91        1.53       0.67
1997--Class B
Shares(b).......   37.28      .0417     17,258     1.83(c)    0.06(c)     2.00(c)    0.11(c)
1997--Institu-
tional Shares...   37.28      .0417    148,942     0.65       1.52        0.85       1.32
1997--Service
Shares(b).......   37.28      .0417      3,666     1.15(c)    0.69(c)     1.35(c)    0.49(c)
- ---------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   39.35         --    129,045     1.25       1.01        1.55       0.71
1996--Institu-
tional
Shares(b).......   39.35         --     64,829     0.65(c)    1.49(c)     0.96(c)    1.18(c)
- ---------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   56.18         --     94,968     1.38       1.33        1.63       1.08
- ---------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   87.73         --     92,769     1.42       0.92        1.67       0.67
- ---------------------------------------------------------------------------------------------------------------------------------
1993--Class A
Shares..........  144.93         --    117,757     1.28       1.30        1.53       1.05
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1992--Class A
Shares(b).......  135.02         --    151,142   1.57(c)      1.24(c)     1.82(c)    0.99(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the investment
    at the NAV at the end of the period and no sales or redemption charges.
    Total return would be reduced if a sales or redemption charge were taken
    into account.
(b) Class A, Class B, Class B, Class C, Institutional and Service Share
    activity commenced on May 24, 1991, May 1, 1996, August 15, 1997, June 15,
    1995 and June 7, 1996, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a Fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
 
                                       10
<PAGE>
 
<TABLE>
<CAPTION>
                            INCOME FROM INVESTMENT
                                OPERATIONS(E)               DISTRIBUTIONS TO SHAREHOLDERS
                            ---------------------- -----------------------------------------------
                                           NET
                                        REALIZED
                                           AND                             FROM NET   IN EXCESS OF
                                       UNREALIZED                          REALIZED   NET REALIZED   NET     NET
                  NET ASSET    NET     GAIN (LOSS)            IN EXCESS    GAIN ON      GAIN ON    INCREASE ASSET
                   VALUE,   INVESTMENT     ON       FROM NET    OF NET    INVESTMENT   INVESTMENT   IN NET  VALUE,
                  BEGINNING   INCOME   INVESTMENTS INVESTMENT INVESTMENT AND FUTURES  AND FUTURES   ASSET   END OF
                  OF PERIOD   (LOSS)   AND FUTURES   INCOME     INCOME   TRANSACTIONS TRANSACTIONS  VALUE   PERIOD
                  --------- ---------- ----------- ---------- ---------- ------------ ------------ -------- ------
<S>               <C>       <C>        <C>         <C>        <C>        <C>          <C>          <C>      <C>
                                                                     CORE LARGE CAP GROWTH FUND
- ------------------------------------------------------------------------------------------------------------------
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998 -- Class A
Shares(b).......   $10.00     $ 0.01      $2.35      $(0.01)       --       $(0.32)      $(0.06)    $1.97   $11.97
1998 -- Class B
Shares(b).......    10.00      (0.03)      2.33          --        --        (0.18)       (0.20)     1.92    11.92
1998 -- Class C
Shares(b).......    11.80      (0.02)      0.54          --      (.01)       (0.38)          --      0.13    11.93
1998 -- Institu-
tional
Shares(b).......    10.00       0.01       2.35       (0.01)       --        (0.19)       (0.19)     1.97    11.97
1998 -- Service
Shares(b).......    10.00      (0.02)      2.35          --        --        (0.08)       (0.30)     1.95    11.95
<CAPTION>
                                                                                   RATIOS ASSUMING NO
                                                                                   VOLUNTARY WAIVER OF
                                                                                     FEES OR EXPENSE
                                                                                       LIMITATIONS
                                                                                   ------------------------
                                                     NET   RATIO OF
                                                   ASSETS    NET       RATIO OF    RATIO OF    RATIO OF
                                                   AT END  EXPENSES      NET       EXPENSES      NET
                                                     OF       TO      INVESTMENT      TO      INVESTMENT
                              PORTFOLIO  AVERAGE   PERIOD  AVERAGE    INCOME TO    AVERAGE     LOSS TO
                    TOTAL     TURNOVER  COMMISSION   (IN     NET       AVERAGE       NET       AVERAGE
                  RETURN(A)     RATE       RATE     000S)   ASSETS    NET ASSETS    ASSETS    NET ASSETS
                  ----------- --------- ---------- ------- ---------- ------------ ---------- -------------
<S>               <C>         <C>       <C>        <C>     <C>        <C>          <C>        <C>
- ------------------------------------------------------------------------------------------------------------------
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998 -- Class A
Shares(b).......    23.79%(d)   74.97%    $.0282   $53,786   0.91%(c)    0.12%(c)    2.40%(c)   (1.37)%(c)
1998 -- Class B
Shares(b).......    23.26(d)    74.97      .0282    13,857   1.67(c)    (0.72)(c)    2.91(c)    (1.96)(c)
1998 -- Class C
Shares(b).......     4.56(d)    74.97      .0282     4,132   1.68(c)    (0.76)(c)    2.92(c)    (2.00)(c)
1998 -- Institu-
tional
Shares(b).......    23.89(d)    74.97      .0282     4,656   0.72(c)     0.42(c)     1.96(c)    (0.82)(c)
1998 -- Service
Shares(b).......    23.56(d)    74.97      .0282       115   1.17(c)    (0.21)(c)    2.41(c)    (1.45)(c)
</TABLE>
- ------------
 (a) Assumes investment at the NAV at the beginning of the period,
     reinvestment of all dividends and distributions, a complete redemption of
     the investment at the NAV at the end of
     the period and no sales or redemption charges. Total return would be
     reduced if a sales or redemption charge were taken into account.
 (b) Class A, Class B, Institutional and Service Share activity commenced on
     May 1, 1997. Class C Share activity commenced on August 15, 1997.
 (c) Annualized.
 (d) Not annualized.
 (e) Includes the balancing effect of calculating per Share amounts.
 
 
 
                                       11
<PAGE>
 
<TABLE>
<CAPTION>
                                  INCOME FROM           DISTRIBUTIONS TO
                           INVESTMENT OPERATIONS(E)       SHAREHOLDERS
                           ------------------------- -----------------------
                                           NET
                                       REALIZED AND               FROM NET
                                        UNREALIZED                REALIZED
                 NET ASSET    NET     GAIN (LOSS) ON    FROM      GAIN ON        NET     NET ASSET
                  VALUE,   INVESTMENT INVESTMENT AND    NET      INVESTMENT   INCREASE    VALUE,               PORTFOLIO
                 BEGINNING   INCOME      FUTURES     INVESTMENT AND FUTURES    IN NET     END OF     TOTAL     TURNOVER
                 OF PERIOD   (LOSS)    TRANSACTIONS    INCOME   TRANSACTIONS ASSET VALUE  PERIOD   RETURN(A)     RATE
                 --------- ---------- -------------- ---------- ------------ ----------- --------- ---------   ---------
                                                                           CORE SMALL CAP EQUITY FUND
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>        <C>          <C>         <C>       <C>         <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......  $10.00     $(0.01)      $0.65          --        $(0.05)      $0.59     $10.59     6.37%(d)    37.65%
1998--Class B
Shares(b).......   10.00      (0.03)       0.64          --         (0.05)       0.56      10.56     6.07(d)     37.65
1998--Class C
Shares(b).......   10.00      (0.02)       0.64          --         (0.05)       0.57      10.57     6.17(d)     37.65
1998--Institu-
tional
Shares(b).......   10.00       0.01        0.65          --         (0.05)       0.61      10.61     6.57(d)     37.65
1998--Service
Shares(b).......   10.00       0.01        0.64          --         (0.05)       0.60      10.60     6.47(d)     37.65
<CAPTION>
                                                                    RATIOS ASSUMING NO
                                                                 VOLUNTARY WAIVER OF FEES
                                                                  OR EXPENSE LIMITATIONS
                                                                 ---------------------------
                                                                                  RATIO
                               NET      RATIO     RATIO OF NET                   OF NET
                            ASSETS AT   OF NET     INVESTMENT     RATIO OF     INVESTMENT
                  AVERAGE    END OF    EXPENSES   INCOME (LOSS)  EXPENSES TO  INCOME (LOSS)
                 COMMISSION  PERIOD   TO AVERAGE   TO AVERAGE    AVERAGE NET   TO AVERAGE
                    RATE    (IN 000S) NET ASSETS   NET ASSETS      ASSETS      NET ASSETS
                 ---------- --------- ----------- -------------- ------------ --------------
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>        <C>       <C>         <C>            <C>          <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......   $.0370    $11,118     1.25%(c)     (0.36)%(c)    3.92%(c)      (3.03)%(c)
1998--Class B
Shares(b).......    .0370      9,957     1.95(c)      (1.04)(c)     4.37(c)       (3.46)(c)
1998--Class C
Shares(b).......    .0370      2,557     1.95(c)      (1.07)(c)     4.37(c)       (3.49)(c)
1998--Institu-
tional
Shares(b).......    .0370      9,026     0.95(c)       0.15 (c)     3.37(c)       (2.27)(c)
1998--Service
Shares(b).......    .0370          2     1.45(c)       0.40 (c)     3.87(c)       (2.02)(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the investment
    at the NAV at the end of the period and no sales or redemption charges.
    Total return would be reduced if a sales or redemption charge were taken
    into account.
(b) Commenced operations on August 15, 1997.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
 
 
 
                                       12
<PAGE>
 
<TABLE>
<CAPTION>
                                       INCOME FROM
                                 INVESTMENT OPERATIONS(E)           DISTRIBUTIONS TO SHAREHOLDERS
                           ------------------------------------ -------------------------------------
                                                                                          IN EXCESS
                                           NET                                              OF NET
                 NET ASSET    NET      REALIZED AND             IN EXCESS    FROM NET      REALIZED   NET INCREASE
                  VALUE,   INVESTMENT   UNREALIZED    FROM NET    OF NET   REALIZED GAIN   GAIN ON     (DECREASE)  NET ASSET
                 BEGINNING   INCOME   GAIN (LOSS) ON INVESTMENT INVESTMENT ON INVESTMENT  INVESTMENT  IN NET ASSET VALUE, END
                 OF PERIOD   (LOSS)    INVESTMENTS     INCOME     INCOME   TRANSACTIONS  TRANSACTIONS    VALUE     OF PERIOD
                 --------- ---------- -------------- ---------- ---------- ------------- ------------ ------------ ----------
                                                                                                    CAPITAL GROWTH FUND
- -----------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>        <C>        <C>           <C>          <C>          <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $16.73     $0.02        $4.78        $(0.01)    $(0.01)     $(3.03)       $  --        $1.75       $18.48
1998--Class B
Shares..........   16.67      0.02         4.61           --         --        (1.20)        (1.83)       1.60        18.27
1998--Class C
Shares(b).......   19.73     (0.02)        1.60           --       (0.04)      (0.47)        (2.56)      (1.49)       18.24
1998--Institu-
tional
Shares(b).......   19.88      0.02         1.66         (0.01)     (0.07)      (0.41)        (2.62)      (1.43)       18.45
1998--Service
Shares(b).......   19.88     (0.01)        1.66           --       (0.04)      (0.76)        (2.27)      (1.42)       18.46
- -----------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   14.91      0.10         3.56         (0.10)     (0.02)      (1.72)          --         1.82        16.73
1997--Class B
Shares(b).......   15.67      0.01         2.81         (0.01)     (0.09)      (1.72)          --         1.00        16.67
- -----------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   13.67      0.12         3.93         (0.12)       --        (2.69)          --         1.24        14.91
- -----------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   15.96      0.03        (0.69)        (0.01)       --        (1.62)          --        (2.29)       13.67
- -----------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   14.64      0.02         2.40         (0.01)     (0.02)      (1.07)          --         1.32        15.96
- -----------------------------------------------------------------------------------------------------------------------------
1993--Class A
Shares..........   13.65      0.06         2.28         (0.07)       --        (1.28)          --         0.99        14.64
- -----------------------------------------------------------------------------------------------------------------------------
1992--Class A
Shares..........   11.10      0.28         2.90         (0.31)       --        (0.32)          --         2.55        13.65
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1991--Class A
Shares(b).......   11.34      0.34        (0.27)        (0.31)       --          --            --        (0.24)       11.10
<CAPTION>
                                                                                             RATIOS ASSUMING
                                                                                           NO VOLUNTARY WAIVER
                                                                                               OF FEES OR
                                                                                           EXPENSE LIMITATIONS
                                                                                        -------------------------
                                                                            RATIO OF                RATIO OF NET
                                                 NET ASSETS   RATIO OF   NET INVESTMENT  RATIO OF    INVESTMENT
                            PORTFOLIO  AVERAGE   AT END OF  NET EXPENSES INCOME (LOSS)  EXPENSES TO INCOME (LOSS)
                   TOTAL    TURNOVER  COMMISSION   PERIOD    TO AVERAGE    TO AVERAGE   AVERAGE NET    AVERAGE
                 RETURN(A)    RATE     RATE(F)   (IN 000S)   NET ASSETS    NET ASSETS     ASSETS     NET ASSETS
                 ---------- --------- ---------- ---------- ------------ -------------- ----------- -------------
- -----------------------------------------------------------------------------------------------------------------------------
<S>              <C>        <C>       <C>        <C>        <C>          <C>            <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........   29.71%     61.50%    $.0612   $1,256,595     1.40%         0.08%        1.65%        (0.17)%
1998--Class B
Shares..........   28.73      61.50      .0612       40,827     2.18         (0.77)        2.18         (0.77)
1998--Class C
Shares(b).......    8.83(d)   61.50      .0612        5,395     2.21(c)      (0.86)(c)     2.21(c)      (0.86)(c)
1998--Institu-
tional
Shares(b).......    9.31(d)   61.50      .0612        7,262     1.16(c)       0.18 (c)     1.16(c)       0.18 (c)
1998--Service
Shares(b).......    9.18(d)   61.50      .0612            2     1.50(c)      (0.16)(c)     1.50(c)      (0.16)(c)
- -----------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   25.97      52.92      .0563      920,646     1.40          0.62         1.65          0.37
1997--Class B
Shares(b).......   19.39(d)   52.92      .0563        3,221     2.15(c)      (0.39)(c)     2.15(c)      (0.39)(c)
- -----------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   30.45      63.90        --       881,056     1.36          0.65         1.61          0.40
- -----------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   (4.38)     38.36        --       862,105     1.38          0.16         1.63         (0.09)
- -----------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   16.89      36.12        --       833,682     1.38          0.13         1.63         (0.12)
- -----------------------------------------------------------------------------------------------------------------------------
1993--Class A
Shares..........   18.01      58.93        --       665,976     1.41          0.42         1.66          0.17
- -----------------------------------------------------------------------------------------------------------------------------
1992--Class A
Shares..........   29.31      48.93        --       500,307     1.53          2.09         1.78          1.84
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1991--Class A
Shares(b).......    0.84(d)   35.63        --       437,533     1.27(c)       3.24(c)      1.47(c)       3.04(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the
    investment at the NAV at the end of the period and no sales or redemption
    charges. Total return would be reduced if a sales or redemption charge
    were taken into account.
(b) Class A, Class B, Class C, Institutional and Service Share activity
    commenced on April 20, 1990, May 1, 1996, August 15, 1997, August 15, 1997
    and August 15, 1997, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a Fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
 
                                       13
<PAGE>
 
<TABLE>
<CAPTION>
                                         INCOME FROM                              DISTRIBUTIONS TO
                                   INVESTMENT OPERATIONS(E)                         SHAREHOLDERS
                           ---------------------------------------- ---------------------------------------------
                                                      NET REALIZED
                                                     AND UNREALIZED                                       NET
                                       NET REALIZED     LOSS ON                             FROM NET    INCREASE   NET
                 NET ASSET            AND UNREALIZED    FOREIGN                IN EXCESS    REALIZED   (DECREASE) ASSET
                  VALUE,      NET        GAIN ON        CURRENCY     FROM NET    OF NET     GAIN ON      IN NET   VALUE,
                 BEGINNING INVESTMENT  INVESTMENTS      RELATED     INVESTMENT INVESTMENT  INVESTMENT    ASSET    END OF
                 OF PERIOD   INCOME    AND OPTIONS    TRANSACTIONS    INCOME     INCOME   TRANSACTIONS   VALUE    PERIOD
                 --------- ---------- -------------- -------------- ---------- ---------- ------------ ---------- ------
                                                                                                    MID CAP EQUITY FUND
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>            <C>        <C>        <C>          <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares(b).......  $23.63     $0.09        $0.77          $(0.01)      $(0.06)    $(0.04)     $(2.77)     $(2.02)  $21.61
1998--Class B
Shares(b).......   23.63      0.06         0.75           (0.01)       (0.09)        --       (2.77)      (2.06)   21.57
1998--Class C
Shares(b).......   23.63      0.06         0.77           (0.01)       (0.09)        --       (2.77)      (2.04)   21.59
1998--Institu-
tional Shares...   18.73      0.16         5.70           (0.04)       (0.13)        --       (2.77)       2.92    21.65
1998--Service
Shares(b).......   23.01      0.09         1.41           (0.01)       (0.11)        --       (2.77)      (1.39)   21.62
- ------------------------------------------------------------------------------------------------------------------------
1997--Institu-
tional Shares...   15.91      0.24         3.77              --        (0.24)     (0.93)      (0.02)       2.82    18.73
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1996--Institu-
tional
Shares(b).......   15.00      0.13         0.90              --        (0.12)        --          --        0.91    15.91
<CAPTION>
                                                                                     RATIOS ASSUMING NO
                                                                                    EXPENSE LIMITATIONS
                                                                                   ------------------------
                                                     NET   RATIO OF    RATIO OF
                                                   ASSETS    NET         NET       RATIO OF     RATIO OF
                                                   AT END  EXPENSES   INVESTMENT   EXPENSES        NET
                                                     OF       TO        INCOME        TO       INVESTMENT
                             PORTFOLIO   AVERAGE   PERIOD  AVERAGE    (LOSS) TO    AVERAGE    INCOME (LOSS)
                   TOTAL     TURNOVER   COMMISSION   (IN     NET       AVERAGE       NET       TO AVERAGE
                 RETURN(A)     RATE      RATE(F)    000S)   ASSETS    NET ASSETS    ASSETS     NET ASSETS
                 ----------- ---------- ---------- ------- ---------- ------------ ---------- -------------
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>         <C>        <C>        <C>     <C>        <C>          <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares(b).......    3.42%(d)   62.60%    $0.0540   $90,588   1.35%(c)    0.33%(c)    1.47%(c)      0.21%(c)
1998--Class B
Shares(b).......    3.17(d)    62.60      0.0540    28,743   1.85(c)    (0.20)(c)    1.97(c)      (0.32)(c)
1998--Class C
Shares(b).......    3.27(d)    62.60      0.0540     6,445   1.85(c)    (0.23)(c)    1.97(c)      (0.35)(c)
1998--Institu-
tional Shares...   30.86       62.60      0.0540   236,440   0.85        0.78        0.97          0.66
1998--Service
Shares(b).......    6.30(d)    62.60      0.0540         8   1.35(c)     0.63 (c)    1.43(c)       0.51 (c)
- ------------------------------------------------------------------------------------------------------------------------
1997--Institu-
tional Shares...   25.63       74.03      0.0547   145,253   0.85        1.35        0.91          1.29
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1996--Institu-
tional
Shares(b).......    6.89(d)    58.77(d)       --   135,671   0.85(c)     1.67(c)     0.98(c)       1.54(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the investment
    at the NAV at the end of the period and no sales or redemption charges.
    Total return would be reduced if a sales or redemption charge were taken
    into account.
(b) Class A, Class B, Class C, Institutional and Service Share activity
    commenced on August 15, 1997, August 15, 1997, August 15, 1997, August 1,
    1995 and July 18, 1997, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a Fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
 
 
                                       14
<PAGE>
 
<TABLE>
<CAPTION>
                                     INCOME FROM                    DISTRIBUTIONS TO
                              INVESTMENT OPERATIONS(E)                SHAREHOLDERS
                           ------------------------------- -----------------------------------
                                          NET REALIZED                  FROM NET
                 NET ASSET    NET        AND UNREALIZED       FROM    REALIZED GAIN IN EXCESS  NET INCREASE
                  VALUE,   INVESTMENT    GAIN (LOSS) ON       NET     ON INVESTMENT   OF NET    (DECREASE)  NET ASSET
                 BEGINNING   INCOME      INVESTMENT AND    INVESTMENT AND OPTIONS   INVESTMENT IN NET ASSET VALUE, END   TOTAL
                 OF PERIOD   (LOSS)   OPTIONS TRANSACTIONS   INCOME   TRANSACTIONS    INCOME      VALUE     OF PERIOD  RETURN(A)
                 --------- ---------- -------------------- ---------- ------------- ---------- ------------ ---------- ---------
                                                                                                          SMALL CAP VALUE FUND
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>                  <C>        <C>           <C>        <C>          <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $20.91     $0.14           $5.33           $  --       $(2.33)      $  --       $ 3.14      $24.05     26.17%
1998--Class B
Shares..........   20.80     (0.01)           5.27              --        (2.33)         --         2.93       23.73     25.29
1998--Class C
Shares(b).......   24.69     (0.06)           1.43              --        (1.99)       (0.34)      (0.96)      23.73      5.51(d)
1998--Institu-
tional
Shares(b).......   24.91      0.03            1.48              --        (2.05)       (0.28)      (0.82)      24.09      6.08(d)
1998--Service
Shares(b).......   24.91     (0.01)           1.48              --        (2.02)       (0.31)      (0.86)      24.05      5.91(d)
- ---------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   17.29     (0.21)           4.92              --        (1.09)         --         3.62       20.91     27.28
1997--Class B
Shares(b).......   20.79     (0.11)           1.21              --        (1.09)         --         0.01       20.80      5.39(d)
- ---------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   16.14     (0.23)           1.39              --        (0.01)         --         1.15       17.29      7.20
- ---------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   20.67     (0.07)          (3.53)             --        (0.69)       (0.24)      (4.53)      16.14    (17.53)
- ---------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   16.68     (0.04)           5.03              --        (1.00)         --         3.99       20.67     30.13
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1993--Class A
Shares(b).......   14.18      0.03            2.50            (0.03)        --           --         2.50       16.68     17.86(d)
<CAPTION>
                                                                                   RATIOS ASSUMING NO
                                                                                    VOLUNTARY WAIVER
                                                                                        OF FEES
                                                                               --------------------------
                                                                  RATIO OF                    RATIO OF
                                      NET ASSETS   RATIO OF    NET INVESTMENT   RATIO OF   NET INVESTMENT
                 PORTFOLIO  AVERAGE   AT END OF  NET EXPENSES INCOME (LOSS) TO EXPENSES TO INCOME (LOSS)
                 TURNOVER  COMMISSION   PERIOD    TO AVERAGE    AVERAGE NET      AVERAGE   TO AVERAGE NET
                   RATE     RATE(F)   (IN 000S)   NET ASSETS       ASSETS      NET ASSETS      ASSETS
                 --------- ---------- ---------- ------------ ---------------- ----------- --------------
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>        <C>          <C>              <C>         <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........   84.81%   $0.0517    $370,246      1.54%         (0.28)%        1.76%        (0.50)%
1998--Class B
Shares..........   84.81     0.0517      42,677      2.29          (0.92)         2.29         (0.92)
1998--Class C
Shares(b).......   84.81     0.0517       5,604      2.09(c)       (0.79)(c)      2.09(c)      (0.79)(c)
1998--Institu-
tional
Shares(b).......   84.81     0.0517      14,626      1.16(c)        0.27(c)       1.16(c)       0.27(c)
1998--Service
Shares(b).......   84.81     0.0517           2      1.45(c)       (0.07)(c)      1.45(c)      (0.07)(c)
- ---------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   99.46      .0461     212,061      1.60          (0.72)         1.85         (0.97)
1997--Class B
Shares(b).......   99.46      .0461       3,674      2.35(c)       (1.63)(c)      2.35(c)      (1.63)(c)
- ---------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   57.58        --      204,994      1.41          (0.59)         1.66         (0.84)
- ---------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   43.67        --      319,487      1.53          (0.53)         1.78         (0.78)
- ---------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   56.81        --      261,074      1.60          (0.45)         1.85         (0.70)
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1993--Class A
Shares(b).......    7.12        --       59,339      1.65(c)        0.62(c)       2.70(c)      (0.43)(c)
</TABLE>
- -----------
(a) Assumes investment at the NAV at the beginning of the period, reinvestment
    of all dividends and distributions, a complete redemption of the investment
    at the NAV at the end of the period and no sales or redemption charges.
    Total return would be reduced if a sales or redemption charge were taken
    into account.
(b) Class A, Class B, Class C, Institutional and Service Share activity
    commenced on October 22, 1992, May 1, 1996, August 15, 1997, August 15,
    1997 and August 15, 1997, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per Share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a Fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
 
 
                                       15
<PAGE>
 
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
 
  The investment objectives and principal investment policies of each Fund are
described below. Other investment practices and management techniques, which
involve certain risks are described under "Description of Securities," "Risk
Factors" and "Investment Techniques." There can be no assurance that a Fund's
investment objectives will be achieved.
 
  The Investment Adviser may purchase for the Funds common stocks, preferred
stocks, interests in real estate investment trusts, convertible debt
obligations, convertible preferred stocks, equity interests in trusts,
partnerships, joint ventures, limited liability companies and similar
enterprises, warrants and stock purchase rights ("equity securities"). In
choosing a Fund's securities, the Investment Adviser utilizes first-hand
fundamental research, including visiting company facilities to assess
operations and to meet decision-makers. The Investment Adviser may also use
macro analysis of numerous economic and valuation variables to anticipate
changes in company earnings and the overall investment climate. The Investment
Adviser is able to draw on the research and market expertise of the Goldman
Sachs Global Investment Research Department and other affiliates of the
Investment Adviser, as well as information provided by other securities
dealers. Equity securities in a Fund's portfolio will generally be sold when
the Investment Adviser believes that the market price fully reflects or
exceeds the securities' fundamental valuation or when other more attractive
investments are identified.
 
   Value Style Funds. The Growth and Income, Mid Cap Equity, Small Cap Value
Funds and the equity portion of the Balanced Fund are managed using a value
oriented approach. The Investment Adviser evaluates securities using
fundamental analysis and intends to purchase equity securities that are, in
its view, underpriced relative to a combination of such companies' long-term
earnings prospects, growth rate, free cash flow and/or dividend-paying
ability. Consideration will be given to the business quality of the issuer.
Factors positively affecting the Investment Adviser's view of that quality
include the competitiveness and degree of regulation in the markets in which
the company operates, the existence of a management team with a record of
success, the position of the company in the markets in which it operates, the
level of the company's financial leverage and the sustainable return on
capital invested in the business. The Funds may also purchase securities of
companies that have experienced difficulties and that, in the opinion of the
Investment Adviser, are available at attractive prices.
 
  Growth Style Funds. The Capital Growth Fund is managed using a growth equity
oriented approach. Equity securities for this Fund is selected based on their
prospects for above average growth. The Investment Adviser will select
securities of growth companies trading, in the Investment Adviser's opinion,
at a reasonable price relative to other industries, competitors and historical
price/earnings multiples. The Fund generally will invest in companies whose
earnings are believed to be in a relatively strong growth trend, or, to a
lesser extent, in companies in which significant further growth is not
anticipated but whose market value per share is thought to be undervalued. In
order to determine whether a security has favorable growth prospects, the
Investment Adviser ordinarily looks for one or more of the following
characteristics in relation to the security's prevailing price: prospects for
above average sales and earnings growth per share; high return on invested
capital; free cash flow generation; sound balance sheet, financial and
accounting policies, and overall financial strength; strong competitive
advantages; effective research, product development, and marketing; pricing
flexibility; strength of management; and general operating characteristics
that will enable the company to compete successfully in its marketplace.
 
                                      16
<PAGE>
 
  Quantitative Style Funds. The CORE U.S. Equity, CORE Large Cap Growth and
CORE Small Cap Equity Funds (the "CORE Funds") are managed using both
quantitative and fundamental techniques. CORE is an acronym for "Computer-
Optimized, Research-Enhanced," which reflects the CORE Funds' investment
process. This investment process and the proprietary multifactor model used to
implement it are discussed below.
 
  Investment Process. The Investment Adviser begins with a broad universe of
U.S. equity securities for the CORE Funds. As described more fully below, the
Investment Adviser uses a proprietary multifactor model (the "Multifactor
Model") to forecast the returns of different markets and individual
securities. In the case of an equity security followed by the Goldman Sachs
Global Investment Research Department (the "Research Department"), a rating is
assigned based upon the Research Department's evaluation. In the discretion of
the Investment Adviser, ratings may also be assigned to equity securities
based on research ratings obtained from other industry sources.
 
  In building a diversified portfolio for each CORE Fund, the Investment
Adviser utilizes optimization techniques to seek to maximize the Fund's
expected return, while maintaining a risk profile similar to the Fund's
benchmark. Each portfolio is primarily comprised of securities rated highest
by the foregoing investment process and has risk characteristics and industry
weightings similar to the relevant Fund's benchmark.
 
  Multifactor Model. The Multifactor Model is a rigorous computerized rating
system for forecasting the returns of different equity markets and individual
equity securities according to fundamental investment characteristics. The
CORE Funds use the Multifactor Model to forecast the returns of securities
held in each Fund's portfolio. The Multifactor Model incorporates common
variables covering measures of value, growth, momentum and risk (e.g.,
book/price ratio, earnings/price ratio, price momentum, price volatility,
consensus growth forecasts, earnings estimate revisions and earnings
stability). All of the factors used in the Multifactor Model have been shown
to significantly impact the performance of the securities and markets they
were designed to forecast.
 
  The weightings assigned to the factors in the Multifactor Model used by the
CORE Funds are derived using a statistical formulation that considers each
factor's historical performance in different market environments. As such, the
Multifactor Model is designed to evaluate each security using only the factors
that are statistically related to returns in the anticipated market
environment. Because it includes many disparate factors, the Investment
Adviser believes that the Multifactor Model is broader in scope and provides a
more thorough evaluation than most conventional, quantitative models.
Securities and markets ranked highest by the Multifactor Model do not have one
dominant investment characteristic; rather, they possess an attractive
combination of investment characteristics.
 
  Research Department. In assigning ratings to equity securities, the Research
Department uses a four category rating system ranging from "recommended for
purchase" to "likely to underperform." The ratings reflect the analyst's
judgment as to the investment results of a specific security and incorporate
economic outlook, valuation, risk and a variety of other factors.
 
  By employing both a quantitative (i.e., the Multifactor Model) and a
qualitative (i.e., research enhanced) method of selecting securities, the CORE
Funds seek to capitalize on the strengths of each discipline.
 
                                      17
<PAGE>
 
 BALANCED FUND
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital growth and current income. The Fund seeks capital
appreciation primarily through the equity component of its portfolio while
investing in fixed income securities primarily to provide income for regular
quarterly dividends.
 
  Primary Investment Focus. The Fund invests, under normal circumstances,
between 45% and 65% of its total assets in equity securities. The Fund also
invests at least 25% of its total assets in fixed-income senior securities and
the remainder of its assets in other fixed income securities and cash. The
percentage of the portfolio invested in equity and fixed-income securities
will vary from time to time as the Investment Adviser evaluates their relative
attractiveness based on market valuations, economic growth and inflation
prospects. This allocation is subject to the Fund's intention to pay regular
quarterly dividends. The amount of quarterly dividends can also be expected to
fluctuate in accordance with factors such as prevailing interest rates and the
percentage of the Fund's assets invested in fixed-income securities.
 
  Other. Although the Fund's equity investments consist primarily of publicly
traded U.S. securities, the Fund may invest up to 10% of its total assets in
the equity securities of foreign issuers, including issuers in Emerging
Countries and equity securities quoted in foreign currencies. A portion of the
Fund's portfolio of equity securities may be selected primarily to provide
current income. Equity securities selected to provide current income may
include interests in real estate investment trusts, convertible securities,
preferred stocks, utility stocks and interests in limited partnerships.
 
  The Fund's fixed-income securities primarily include securities issued by
the U.S. Government, its agencies, instrumentalities or sponsored enterprises,
corporations or other entities, mortgage-backed and asset-backed securities,
municipal securities and custodial receipts. The Fund may also invest in debt
obligations (U.S. dollar and non-U.S. dollar denominated) issued or guaranteed
by one or more foreign governments or any of their political subdivisions,
agencies or instrumentalities and foreign corporations or other entities. Such
securities are collectively referred to herein as "fixed-income securities."
The Fund's investments in fixed-income securities that are issued by foreign
issuers, including issuers in Emerging Countries, may not exceed 10% of the
Fund's total assets. The Fund may employ certain currency techniques to seek
to hedge against currency exchange rate fluctuations or to seek to increase
total return. When used to seek to enhance return, these management techniques
are considered speculative. Such currency management techniques involve risks
different from those associated with investing solely in securities of U.S.
issuers quoted in U.S. dollars. See "Description of Securities," "Investment
Techniques" and "Risk Factors."
 
 GROWTH AND INCOME FUND
 
 
  Objectives. The Fund's investment objectives are to provide investors with
long-term growth of capital and growth of income.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 65% of its total assets in equity securities that the Investment Adviser
considers to have favorable prospects for capital appreciation and/or
dividend-paying ability.
 
  Other. The Fund may invest up to 35% of its total assets in fixed-income
securities that, in the opinion of the Investment Adviser, offer the potential
to further the Fund's investment objectives. In addition, although the Fund
will invest primarily in publicly traded U.S. securities, it may invest up to
25% of its total assets in foreign securities, including securities of issuers
in Emerging Countries and securities quoted in foreign currencies.
 
                                      18
<PAGE>
 
 CORE U.S. EQUITY FUND (FORMERLY, THE "SELECT EQUITY FUND")
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital and dividend income. The Fund seeks to achieve its
objective through a broadly diversified portfolio of large cap and blue chip
equity securities representing all major sectors of the U.S. economy.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities of U.S. issuers, including
certain foreign issuers that are traded in the United States. The Fund's
investments are selected using both a variety of quantitative techniques and
fundamental research in seeking to maximize the Fund's expected return, while
maintaining risk, style, capitalization and industry characteristics similar
to the S&P 500 Index. The Fund seeks a broad representation in most major
sectors of the U.S. economy and a portfolio comprised of companies with
average long-term earnings growth expectations and dividend yields. The Fund
may invest only in fixed-income securities that are considered cash
equivalents.
 
  For a description of the investment process of the Fund, see "Investment
Objectives and Policies--Quantitative Style Funds."
 
 CORE LARGE CAP GROWTH FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital. The Fund seeks to achieve its objective through a
broadly diversified portfolio of equity securities of large cap U.S. issuers
that are expected to have better prospects for earnings growth than the growth
rate of the general domestic economy. Dividend income is a secondary
consideration.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities of U.S. issuers, including
certain foreign issuers that are traded in the United States. The Investment
Adviser emphasizes a company's growth prospects in analyzing equity securities
to be purchased by the Fund. The Fund's investments are selected using both a
variety of quantitative techniques and fundamental research in seeking to
maximize the Fund's expected return, while maintaining risk, style,
capitalization and industry characteristics similar to the Russell 1000 Growth
Index. The Fund seeks a portfolio comprised of companies with above average
capitalizations and earnings growth expectations and below average dividend
yields. The Fund may invest only in fixed-income securities that are
considered cash equivalents.
 
  For a description of the investment process of the Fund, see "Investment
Objectives and Policies--Quantitative Style Funds."
 
 CORE SMALL CAP EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital. The Fund seeks to achieve its objective through a
broadly diversified portfolio of equity securities of U.S. issuers which are
included in the Russell 2000 Index at the time of investment.
 
   Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities of U.S. issuers, including
certain foreign issuers that are traded in the United States. The Fund's
investments are selected using both a variety of quantitative techniques and
fundamental research in seeking to maximize the Fund's expected return, while
maintaining risk, style, capitalization and industry
 
                                      19
<PAGE>
 
characteristics similar to the Russell 2000 Index. The Fund seeks a portfolio
comprised of companies with small market capitalizations, strong expected
earnings growth and momentum, and better valuation and risk characteristics
than the Russell 2000 Index. The Fund may invest only in fixed-income
securities that are considered cash equivalents.
 
  The Investment Adviser believes that companies in which the Fund may invest
offer greater opportunity for growth of capital than larger, more mature,
better known companies. Investments in small market capitalization issuers
involve special risks. See "Description of Securities" and "Risk Factors." If
the issuer of a portfolio security held by the Fund is no longer included in
the Russell 2000 Index, the Fund may, but is not required to, sell the
security.
 
  For a description of the investment process of the Fund, see "Investment
Objectives and Policies--Quantitative Style Funds."
 
 CAPITAL GROWTH FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities. The Fund seeks to achieve
its investment objective by investing in a diversified portfolio of equity
securities that are considered by the Investment Adviser to have long-term
capital appreciation potential.
 
  Other. Although the Fund will invest primarily in publicly traded U.S.
securities, it may invest up to 10% of its total assets in foreign securities,
including securities of issuers in Emerging Countries and securities quoted in
foreign currencies.
 
 MID CAP EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal circumstances,
substantially all of its assets in equity securities and at least 65% of its
total assets in equity securities of Mid-Cap Companies with public stock
market capitalizations (based upon shares available for trading on an
unrestricted basis) within the range of the market capitalization of companies
constituting the Russell Midcap Index at the time of investment (currently
between $400 million and $16 billion). If the capitalization of an issuer
increases above $16 billion after purchase of such issuer's securities, the
Fund may, but is not required to, sell the securities. Dividend income, if
any, is an incidental consideration.
 
  Other. The Fund may invest up to 35% of its total assets in fixed-income
securities. In addition, although the Fund will invest primarily in publicly
traded U.S. securities, it may invest up to 25% of its total assets in foreign
securities, including securities of issuers in Emerging Countries and
securities quoted in foreign currencies.
 
 SMALL CAP VALUE FUND (FORMERLY, THE "SMALL CAP EQUITY FUND")
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital growth.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 65% of its total assets in equity securities of companies with public
stock market capitalizations of $1 billion or less at the time of
 
                                      20
<PAGE>
 
investment. Under normal circumstances, the Fund's investment horizon for
ownership of stocks will be two to three years. Dividend income, if any, is an
incidental consideration. If the market capitalization of a company held by
the Fund increases above the amount stated above, the Fund may, consistent
with its investment objective, continue to hold the security.
 
  Small Capitalization Companies. The Fund invests in companies which the
Investment Adviser believes are well managed niche businesses that have the
potential to achieve high or improving returns on capital and/or above average
sustainable growth. The Fund may invest in securities of small market
capitalization companies which may have experienced financial difficulties.
Investments may also be made in companies that are in the early stages of
their life and that the Investment Adviser believes have significant growth
potential. The Investment Adviser believes that the companies in which the
Fund may invest offer greater opportunity for growth of capital than larger,
more mature, better known companies. However, investments in such small market
capitalization companies involve special risks. See "Description of
Securities" and "Risk Factors."
 
  Other. The Fund may invest in the aggregate up to 35% of its total assets in
the equity securities of companies with public stock market capitalizations in
excess of $1 billion at the time of investment and in fixed- income
securities. In addition, although the Fund will invest primarily in publicly
traded U.S. securities, it may invest up to 25% of its total assets in foreign
securities, including securities of issuers in Emerging Countries and
securities quoted in foreign currencies.
 
 
                           DESCRIPTION OF SECURITIES
 
 
  The Funds may invest in equity and fixed income securities in accordance
with the investment policies stated above. Certain of these permitted
investments are described in more detail in this section.
 
CONVERTIBLE SECURITIES
 
  Each Fund may invest in convertible securities, including debt obligations
and preferred stock of the issuer convertible at a stated exchange rate into
common stock of the issuer. Convertible securities generally offer lower
interest or dividend yields than non-convertible securities of similar
quality. As with all fixed-income securities, the market value of convertible
securities tends to decline as interest rates increase and, conversely, to
increase as interest rates decline. However, when the market price of the
common stock underlying a convertible security exceeds the conversion price,
the convertible security tends to reflect the market price of the underlying
common stock. As the market price of the underlying common stock declines, the
convertible security tends to trade increasingly on a yield basis, and thus
may not decline in price to the same extent as the underlying common stock.
Convertible securities rank senior to common stocks in an issuer's capital
structure and consequently entail less risk than the issuer's common stock. In
evaluating a convertible security, the Investment Adviser will give primary
emphasis to the attractiveness of the underlying common stock. The convertible
debt securities in which the Balanced Fund invests will be rated, at the time
of investment, B or better by Standard & Poor's Ratings Group ("Standard &
Poor's") or Moody's Investors Service, Inc. ("Moody's"), or if unrated by such
rating organizations, determined to be of comparable quality by the Investment
Adviser. The convertible securities in which the CORE Funds invest are not
subject to any minimum rating criteria. The convertible debt securities in
which the other Funds may invest are subject to the same rating criteria as a
Fund's investments in non-convertible debt securities. Convertible debt
securities are equity investments for purposes of each Fund's investment
policies.
 
                                      21
<PAGE>
 
FOREIGN INVESTMENTS
 
  FOREIGN SECURITIES. Each Fund may invest in the securities of foreign
issuers (provided that the CORE U.S. Equity, CORE Large Cap Growth and CORE
Small Cap Equity Funds may only invest in equity securities of foreign issuers
that are traded in the U.S.). Investments in foreign securities may offer
potential benefits that are not available from investments exclusively in
equity securities of domestic issuers quoted in U.S. dollars. Foreign
countries may have economic policies or business cycles different from those
of the U.S. and markets for foreign securities do not necessarily move in a
manner parallel to U.S. markets.
 
  Investing in the securities of foreign issuers involves certain special
risks, including those set forth below, which are not typically associated
with investing in U.S. dollar denominated or quoted securities of U.S.
issuers. Such investments may be affected by changes in currency rates,
changes in foreign or U.S. laws or restrictions applicable to such investments
and in exchange control regulations (e.g., currency blockage). A decline in
the exchange rate of the currency (i.e., weakening of the currency against the
U.S. dollar) in which a portfolio security is quoted or denominated relative
to the U.S. dollar would reduce the value of the portfolio security. In
addition, if the currency in which a Fund receives dividends, interest or
other payments declines in value against the U.S. dollar before such income is
distributed as dividends to shareholders or converted to U.S. dollars, the
Fund may have to sell portfolio securities to obtain sufficient cash to pay
such dividends. The expected introduction of a single currency, the euro, on
January 1, 1999 for participating European nations in the Economic and
Monetary Union ("EU") presents unique uncertainties, including whether the
payment and operational systems of banks and other financial institutions will
be ready by the scheduled launch date; the creation of suitable clearing and
settlement payment systems for the new currency; the legal treatment of
certain outstanding financial contracts after January 1, 1999 that refer to
existing currencies rather than the euro; the establishment and maintenance of
exchange rates for currencies being converted into the euro and the euro; the
fluctuation of the euro relative to non-euro currencies during the transition
period from January 1, 1999 to December 31, 2000 and beyond; whether the
interest rate, tax and labor regimes of European countries participating in
the euro will converge over time; and whether the conversion of the currencies
of other EU countries such as the United Kingdom, Denmark and Greece into the
euro and the admission of other non-EU countries such as Poland, Latvia and
Lithuania as members of the EU may have an impact on the euro. These or other
factors, including political and economic risks, could cause market
disruptions before or after the introduction of the euro, and could adversely
affect the value of securities and foreign currencies held by the Funds.
Commissions on transactions in foreign securities may be higher than those for
similar transactions on domestic stock markets. In addition, clearance and
settlement procedures may be different in foreign countries and, in certain
markets, such procedures have been unable to keep pace with the volume of
securities transactions, thus making it difficult to conduct such
transactions.
 
  Foreign issuers are not generally subject to uniform accounting, auditing
and financial reporting standards comparable to those applicable to U.S.
issuers. There may be less publicly available information about a foreign
issuer than about a U.S. issuer. In addition, there is generally less
government regulation of foreign markets, companies and securities dealers
than in the United States. Foreign securities markets may have substantially
less volume than U.S. securities markets and securities of many foreign
issuers are less liquid and more volatile than securities of comparable
domestic issuers. Furthermore, with respect to certain foreign countries,
there is a possibility of nationalization, expropriation or confiscatory
taxation, imposition of withholding or other taxes on dividend or interest
payments (or, in some cases, capital gains), limitations on the removal of
funds or other assets of the Funds, political or social instability or
diplomatic developments which could affect investments in those countries.
 
  INVESTMENTS IN ADRS, EDRS AND GDRS. Each Fund may invest in foreign
securities which take the form of sponsored and unsponsored American
Depository Receipts ("ADRs") and Global Depository Receipts
 
                                      22
<PAGE>
 
("GDRs") and each Fund, other than the CORE Funds, may also invest in European
Depository Receipts ("EDRs") or other similar instruments representing
securities of foreign issuers (together, "Depository Receipts"). ADRs
represent the right to receive securities of foreign issuers deposited in a
domestic bank or a correspondent bank. Prices of ADRs are quoted in U.S.
dollars, and ADRs are traded in the United States on exchanges or over-the-
counter and are sponsored and issued by domestic banks. EDRs and GDRs are
receipts evidencing an arrangement with a non-U.S. bank. EDRs and GDRs are not
necessarily quoted in the same currency as the underlying security. To the
extent a Fund acquires Depository Receipts through banks which do not have a
contractual relationship with the foreign issuer of the security underlying
the Depository Receipts to issue and service such Depository Receipts
(unsponsored Depository Receipts), there may be an increased possibility that
the Fund would not become aware of and be able to respond to corporate
actions, such as stock splits or rights offerings involving the foreign
issuer, in a timely manner. In addition, the lack of information may result in
inefficiencies in the valuation of such instruments. Investment in Depository
Receipts does not eliminate all the risks inherent in investing in securities
of non-U.S. issuers. The market value of Depository Receipts is dependent upon
the market value of the underlying securities and fluctuations in the relative
value of the currencies in which the Depository Receipt and the underlying
securities are quoted. However, by investing in Depository Receipts, such as
ADRs, that are quoted in U.S. dollars, a Fund may avoid currency risks during
the settlement period for purchases and sales.
 
  FOREIGN CURRENCY TRANSACTIONS. Because investment in foreign issuers will
usually involve currencies of foreign countries, and because the Balanced Fund
may have currency exposure independent of its securities positions, the value
of the assets of a Fund as measured in U.S. dollars will be affected by
changes in foreign currency exchange rates. A Fund may, to the extent it
invests in foreign securities, purchase or sell foreign currencies on a spot
basis and may also purchase or sell forward foreign currency exchange
contracts for hedging purposes and to seek to protect against anticipated
changes in future foreign currency exchange rates. In addition, the Balanced
Fund may enter into such contracts to seek to increase total return when the
Investment Adviser anticipates that the foreign currency will appreciate or
depreciate in value, but securities denominated or quoted in that currency do
not present attractive investment opportunities and are not held in the Fund's
portfolio. When entered into to seek to enhance return, forward foreign
currency exchange contracts are considered speculative. The Balanced Fund may
also engage in cross-hedging by using forward contracts in a currency
different from that in which the hedged security is denominated or quoted if
the Investment Adviser determines that there is a pattern of correlation
between the two currencies. If a Fund enters into a forward foreign currency
exchange contract to buy foreign currency for any purpose or the Balanced Fund
enter into forward foreign currency exchange contracts to sell foreign
currency to seek to increase total return, the Fund will segregate cash or
liquid assets in an amount equal to the value of the Fund's total assets
committed to the consummation of the forward contract, or otherwise cover its
position in a manner permitted by the SEC. The Fund will incur costs in
connection with conversions between various currencies. A Fund may hold
foreign currency received in connection with investments in foreign securities
when, in the judgment of the Investment Adviser, it would be beneficial to
convert such currency into U.S. dollars at a later date, based on anticipated
changes in the relevant exchange rate.
 
  Currency exchange rates may fluctuate significantly over short periods of
time causing, along with other factors, a Fund's NAV to fluctuate. Currency
exchange rates generally are determined by the forces of supply and demand in
the foreign exchange markets and the relative merits of investments in
different countries, actual or anticipated changes in interest rates and other
complex factors, as seen from an international perspective. Currency exchange
rates also can be affected unpredictably by the intervention of U.S. or
foreign governments or central banks, or the failure to intervene, or by
currency controls or political developments in the U.S. or abroad. To the
extent that a substantial portion of a Fund's total assets, adjusted to
reflect the Fund's net
 
                                      23
<PAGE>
 
position after giving effect to currency transactions, is denominated or
quoted in the currencies of foreign countries, the Fund will be more
susceptible to the risk of adverse economic and political developments within
those countries.
 
  The market in forward foreign currency exchange contracts, currency swaps
and other privately negotiated currency instruments offers less protection
against defaults by the other party to such instruments than is available for
currency instruments traded on an exchange. Such contracts are subject to the
risk that the counterparty to the contract will default on its obligations.
Since these contracts are not guaranteed by an exchange or clearinghouse, a
default on the contract would deprive the Fund of unrealized profits,
transaction costs or the benefits of a currency hedge or force the Fund to
cover its purchase or sale commitments, if any, at the current market price. A
Fund will not enter into forward foreign currency exchange contracts, currency
swaps or other privately negotiated currency instruments unless the credit
quality of the unsecured senior debt or the claims-paying ability of the
counterparty is considered to be investment grade by the Investment Adviser.
 
  The Balanced Fund may also engage in a variety of foreign currency
management techniques. For a discussion of such instruments and the risks
associated with their use, see "Investment Objective and Policies" in the
Additional Statement.
 
FIXED-INCOME SECURITIES
 
  U.S. GOVERNMENT SECURITIES. Each Fund may invest in U.S. Government
securities. Generally, these securities include U.S. Treasury obligations and
obligations issued or guaranteed by U.S. Government agencies,
instrumentalities or sponsored enterprises. U.S. Government securities also
include Treasury receipts and other stripped U.S. Government securities, where
the interest and principal components of stripped U.S. Government securities
are traded independently. A Fund may also invest in zero coupon U.S. Treasury
securities and in zero coupon securities issued by financial institutions,
which represent a proportionate interest in underlying U.S. Treasury
securities. A zero coupon security pays no interest to its holder during its
life and its value consists of the difference between its face value at
maturity and its cost. The market prices of zero coupon securities generally
are more volatile than the market prices of securities that pay interest
periodically. See "Taxation" in the Additional Statement.
 
  FOREIGN GOVERNMENT SECURITIES. The Balanced Fund may invest in debt
obligations of foreign governments and governmental agencies, including those
of Emerging Countries. Investment in sovereign debt obligations involves
special risks not present in debt obligations of corporate issuers. The issuer
of the debt or the governmental authorities that control the repayment of the
debt may be unable or unwilling to repay principal or interest when due in
accordance with the terms of such debt, and the Fund may have limited recourse
in the event of a default. Periods of economic uncertainty may result in the
volatility of market prices of sovereign debt, and in turn the Fund's NAV, to
a greater extent than the volatility inherent in debt obligations of U.S.
issuers. A sovereign debtor's willingness or ability to repay principal and
pay interest in a timely manner may be affected by, among other factors, its
cash flow situation, the extent of its foreign currency reserves, the
availability of sufficient foreign exchange on the date a payment is due, the
relative size of the debt service burden to the economy as a whole, the
sovereign debtor's policy toward international lenders and the political
constraints to which a sovereign debtor may be subject.
 
  MORTGAGE-BACKED AND ASSET-BACKED SECURITIES. Each Fund (other than the CORE
Funds) may invest in mortgage-backed securities ("Mortgage-Backed
Securities"), which represent direct or indirect participations in, or are
collateralized by and payable from, mortgage loans secured by real property.
Each Fund (other than the CORE Funds) may also invest in asset-backed
securities ("Asset-Backed Securities"). The principal and interest payments on
Asset-Backed Securities are collateralized by pools of assets such as auto
loans, credit card receivables, leases, installment contracts and personal
property. Such asset pools are securitized through the use
 
                                      24
<PAGE>
 
of special purpose trusts or corporations. Principal and interest payments may
be credit enhanced by a letter of credit, a pool insurance policy or a
senior/subordinated structure.
 
  The Balanced Fund may also invest in stripped Mortgage-Backed Securities
("SMBS") (including interest only and principal only securities), which are
derivative multiple class Mortgage-Backed Securities. SMBS are usually
structured with two different classes: one that receives 100% of the interest
payments and the other that receives 100% of the principal payments from a
pool of mortgage loans. If the underlying mortgage loans experience different
than anticipated prepayments of principal, the Fund may fail to recoup fully
its initial investment in these securities. The market value of the class
consisting entirely of principal payments generally is unusually volatile in
response to changes in interest rates. The yields on a class of SMBS that
receives all or most of the interest from mortgage loans are generally higher
than prevailing market yields on other Mortgage-Backed Securities because
their cash flow patterns are more volatile and there is a greater risk that
the initial investment will not be fully recouped. The Fund's investments in
SMBS may require the Fund to sell portfolio securities to generate sufficient
cash to satisfy certain income distribution requirements.
 
  CORPORATE DEBT OBLIGATIONS. Each Fund may invest in corporate debt
obligations. Corporate debt obligations are subject to the risk of an issuer's
inability to meet principal and interest payments on the obligations.
 
  BANK OBLIGATIONS. Each Fund may invest in obligations issued or guaranteed
by U.S. or foreign banks. Bank obligations, including without limitations,
time deposits, bankers' acceptances and certificates of deposit, may be
general obligations of the parent bank or may be limited to the issuing branch
by the terms of the specific obligations or by government regulation. Banks
are subject to extensive but different governmental regulations which may
limit both the amount and types of loans which may be made and interest rates
which may be charged. In addition, the profitability of the banking industry
is largely dependent upon the availability and cost of funds for the purpose
of financing lending operations under prevailing money market conditions.
General economic conditions as well as exposure to credit losses arising from
possible financial difficulties of borrowers play an important part in the
operation of this industry.
 
  STRUCTURED SECURITIES. Each Fund may invest in structured securities. The
value of the principal of and/or interest on such securities is determined by
reference to changes in the value of specific currencies, interest rates,
commodities, indices or other financial indicators (the "Reference") or the
relative change in two or more References. The interest rate or the principal
amount payable upon maturity or redemption may be increased or decreased
depending upon changes in the applicable Reference. The terms of the
structured securities may provide that in certain circumstances no principal
is due at maturity and, therefore, result in the loss of a Fund's investment.
Structured securities may be positively or negatively indexed, so that
appreciation of the Reference may produce an increase or decrease in the
interest rate or value of the security at maturity. In addition, changes in
the interest rates or the value of the security at maturity may be a multiple
of changes in the value of the Reference. Consequently, structured securities
may entail a greater degree of market risk than other types of fixed-income
securities. Structured securities may also be more volatile, less liquid and
more difficult to price accurately than less complex securities.
 
  RATING CRITERIA. Except as noted below, each Fund (other than the CORE
Funds, which only invest in debt instruments that are cash equivalents) may
invest in debt securities rated at least investment grade at the time of
investment. Investment grade debt securities are securities rated BBB or
higher by Standard & Poor's or Baa or higher by Moody's. A security will be
deemed to have met a rating requirement if it receives the minimum required
rating from at least one such rating organization even though it has been
rated below the minimum rating by one or more other rating organizations, or
if unrated by such rating organizations, determined by the Investment Adviser
to be of comparable credit quality. The Balanced Fund may invest up to 10% of
its total assets on debt securities that are rated BB or B by Standard &
Poor's or Ba or B by Moody's. The Growth
 
                                      25
<PAGE>
 
and Income, Capital Growth and Small Cap Value Funds may invest up to 10%, 10%
and 35%, respectively, of their total assets in debt securities which are
unrated or rated in the lowest rating categories by Standard & Poor's or
Moody's (i.e., BB or lower by Standard & Poor's or Ba or lower by Moody's),
including securities rated D by Moody's or Standard & Poor's. Mid Cap Equity
Fund may invest up to 10% of its total assets in below investment grade debt
securities rated B or higher by Standard & Poor's or B or higher by Moody's.
Fixed-income securities rated BBB or Baa are considered medium-grade
obligations with speculative characteristics, and adverse economic conditions
or changing circumstances may weaken their issuers' capacity to pay interest
and repay principal. Fixed-income securities rated BB or Ba or below (or
comparable unrated securities) are commonly referred to as "junk bonds," are
considered predominately speculative and may be questionable as to principal
and interest payments. In some cases, such bonds may be highly speculative,
have poor prospects for reaching investment grade standing and be in default.
As a result, investment in such bonds will entail greater speculative risks
than those associated with investment in investment grade bonds. Also, to the
extent that the rating assigned to a security in a Fund's portfolio is
downgraded by a rating organization, the market price and liquidity of such
security may be adversely affected. See Appendix A to the Additional Statement
for a description of the corporate bond ratings assigned by Standard & Poor's
and Moody's.
 
REAL ESTATE INVESTMENT TRUSTS ("REITS")
 
  Each Fund may invest in REITs, which are pooled investment vehicles that
invest primarily in either real estate or real estate related loans. The value
of a REIT is affected by changes in the value of the properties owned by the
REIT or securing mortgage loans held by the REIT. REITs are dependent upon
cash flow from their investments to repay financing costs and the ability of
the REITs' manager. REITs are also subject to risks generally associated with
investments in real estate. A Fund will indirectly bear its proportionate
share of any expenses, including management fees, paid by a REIT in which it
invests.
 
 
                             INVESTMENT TECHNIQUES
 
 
OPTIONS ON SECURITIES AND SECURITIES INDICES
 
  Each Fund (other than the CORE U.S. Equity and CORE Large Cap Growth Funds)
may write (sell) covered call and put options and purchase call and put
options on any securities in which it may invest or on any securities index
composed of securities in which it may invest. The writing and purchase of
options is a highly specialized activity which involves investment techniques
and risks different from those associated with ordinary portfolio securities
transactions. The use of options to seek to increase total return involves the
risk of loss if the Investment Adviser is incorrect in its expectation of
fluctuations in securities prices or interest rates. The successful use of
options for hedging purposes also depends in part on the ability of the
Investment Adviser to manage future price fluctuations and the degree of
correlation between the options and securities markets. If the Investment
Adviser is incorrect in its expectation of changes in securities prices or
determination of the correlation between the securities indices on which
options are written and purchased and the securities in a Fund's investment
portfolio, the investment performance of the Fund will be less favorable than
it would have been in the absence of such options transactions. The writing of
options could significantly increase a Fund's portfolio turnover rate and,
therefore, associated brokerage commissions or spreads.
 
OPTIONS ON FOREIGN CURRENCIES
 
  A Fund may, to the extent it invests in foreign securities, purchase and
sell (write) call and put options on foreign currencies for the purpose of
protecting against declines in the U.S. dollar value of foreign portfolio
securities and anticipated dividends on such securities and against increases
in the U.S. dollar cost of foreign securities to be acquired. In addition, the
Balanced Fund may use options on currency to cross-hedge, which
 
                                      26
<PAGE>
 
involves writing or purchasing options on one currency to hedge against
changes in exchange rates for a different currency, if there is a pattern of
correlation between the two currencies. As with other kinds of options
transactions, however, the writing of an option on a foreign currency will
constitute only a partial hedge, up to the amount of the premium received. If
an option that a Fund has written is exercised, the Fund could be required to
purchase or sell foreign currencies at disadvantageous exchange rates, thereby
incurring losses. The purchase of an option on foreign currency may constitute
an effective hedge against exchange rate fluctuations; however, in the event
of exchange rate movements adverse to a Fund's position, the Fund may forfeit
the entire amount of the premium plus related transaction costs. In addition
to purchasing call and put options for hedging purposes, the Balanced Fund may
purchase call or put options on currency to seek to increase total return when
the Investment Adviser anticipates that the currency will appreciate or
depreciate in value, but the securities quoted or denominated in that currency
do not present attractive investment opportunities and are not held in the
Fund's portfolio. When purchased or sold to seek to increase total return,
options on currencies are considered speculative. Options on foreign
currencies written or purchased by the Funds are traded on U.S. and foreign
exchanges or over-the-counter.
 
FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS
 
  To seek to increase total return or to hedge against changes in interest
rates, securities prices or currency exchange rates, a Fund may purchase and
sell various kinds of futures contracts, and purchase and write call and put
options on any of such futures contracts. Each Fund may also enter into
closing purchase and sale transactions with respect to any such contracts and
options. The futures contracts may be based on various securities (such as
U.S. Government securities), foreign currencies, securities indices and other
financial instruments and indices. The CORE U.S. Equity and CORE Large Cap
Growth Funds may enter into such transactions only with respect to the S&P 500
Index in the case of the CORE U.S. Equity Fund and a representative index in
the case of the CORE Large Cap Growth Fund. A Fund will engage in futures and
related options transactions for bona fide hedging purposes as defined in
regulations of the Commodity Futures Trading Commission or to seek to increase
total return to the extent permitted by such regulations. A Fund may not
purchase or sell futures contracts or purchase or sell related options to seek
to increase total return, except for closing purchase or sale transactions, if
immediately thereafter the sum of the amount of initial margin deposits and
premiums paid on the Fund's outstanding positions in futures and related
options entered into for the purpose of seeking to increase total return would
exceed 5% of the market value of the Fund's net assets. These transactions
involve brokerage costs, require margin deposits and, in the case of contracts
and options obligating a Fund to purchase securities or currencies, require
the Fund to segregate and maintain cash or liquid assets with a value equal to
the amount of the Fund's obligations or to otherwise cover the obligations in
a manner permitted by the SEC.
 
  While transactions in futures contracts and options on futures may reduce
certain risks, such transactions themselves entail certain other risks. See
"Investment Objectives and Policies--Futures Contracts and Options on Future
Contracts" in the Additional Statement. Thus, while a Fund may benefit from
the use of futures and options on futures, unanticipated changes in interest
rates, securities prices or currency exchange rates may result in poorer
overall performance than if the Fund had not entered into any futures
contracts or options transactions. Because perfect correlation between a
futures position and portfolio position that is intended to be protected is
impossible to achieve, the desired protection may not be obtained and a Fund
may be exposed to risk of loss. The loss incurred by a Fund in entering into
futures contracts and in writing call options on futures is potentially
unlimited and may exceed the amount of the premium received. Futures markets
are highly volatile and the use of futures may increase the volatility of a
Fund's NAV. The profitability of a Fund's trading in futures to seek to
increase total return depends upon the ability of the Investment Adviser to
analyze correctly the futures markets. In addition, because of the low margin
deposits normally required in futures trading, a relatively small price
 
                                      27
<PAGE>
 
movement in a futures contract may result in substantial losses to a Fund.
Further, futures contracts and options on futures may be illiquid, and
exchanges may limit fluctuations in futures contract prices during a single
day. The Funds may engage in futures transactions on both U.S. and foreign
exchanges. Foreign exchanges may not provide the same protection as U.S.
exchanges.
 
STANDARD AND POOR'S DEPOSITORY RECEIPTS
 
  Each Fund may, consistent with its objectives, purchase Standard & Poor's
Depository Receipts ("SPDRs"). SPDRs are American Stock Exchange-traded
securities that represent ownership in the SPDR Trust, a trust which has been
established to accumulate and hold a portfolio of common stocks that is
intended to track the price performance and dividend yield of the S&P 500.
This trust is sponsored by a subsidiary of the American Stock Exchange. SPDRs
may be used for several reasons, including but not limited to: facilitating
the handling of cash flows or trading, or reducing transaction costs. The use
of SPDRs would introduce additional risk to the Fund as the price movement of
the instrument does not perfectly correlate with the price action of the
underlying index.
 
EQUITY SWAPS
 
  Each Fund may invest up to 10% of its total assets in equity swaps. Equity
swaps allow the parties to a swap agreement to exchange the dividend income or
other components of return on an equity investment (e.g., a group of equity
securities or an index) for a component of return on another non-equity or
equity investment. An equity swap may be used by a Fund to invest in a market
without owning or taking physical custody of securities in circumstances in
which direct investment may be restricted for legal reasons or is otherwise
impractical. Equity swaps are derivatives and their value can be very
volatile. To the extent that the Investment Adviser does not accurately
analyze and predict the potential relative fluctuation of the components
swapped with another party, a Fund may suffer a loss. The value of some
components of an equity swap (such as the dividends on a common stock) may
also be sensitive to changes in interest rates. Furthermore, during the period
a swap is outstanding, a Fund may suffer a loss if the counterparty defaults.
In connection with its investments in equity swaps, a Fund will either
segregate cash or liquid assets or otherwise cover its obligations in a manner
required by the SEC.
 
WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS
 
  Each Fund may purchase when-issued securities. When-issued transactions
arise when securities are purchased by a Fund with payment and delivery taking
place in the future in order to secure what is considered to be an
advantageous price and yield to the Fund at the time of entering into the
transaction. Each Fund may also purchase or sell securities on a forward
commitment basis; that is, make contracts to purchase or sell securities for a
fixed price at a future date beyond the customary three-day settlement period.
The purchase of securities on a when-issued or forward commitment basis
involves a risk of loss if the value of the security to be purchased declines
prior to the settlement date. Conversely, securities sold on a forward
commitment basis involve the risk that the value of the securities to be sold
may increase prior to the settlement date. Although a Fund would generally
purchase securities on a when-issued or forward commitment basis with the
intention of acquiring securities for its portfolio, a Fund may dispose of
when-issued securities or forward commitments prior to settlement if the
Investment Adviser deems it appropriate to do so. A Fund will segregate cash
or liquid assets in an amount sufficient to meet the purchase price until
three days prior to the settlement date. Alternatively, each Fund may enter
into offsetting contracts for the forward sale of other securities that it
owns.
 
ILLIQUID AND RESTRICTED SECURITIES
 
  A Fund will not invest more than 15% of its net assets in illiquid
investments, which include securities (both foreign and domestic) that are not
readily marketable, certain SMBS, repurchase agreements maturing in more than
seven days, time deposits with a notice or demand period of more than seven
days, certain over-the-
 
                                      28
<PAGE>
 
counter options and certain restricted securities, unless it is determined,
based upon a review of the trading markets for a specific restricted security,
that such restricted security is eligible for resale under Rule 144A under the
Securities Act of 1933 and, therefore, is liquid. The Trustees have adopted
guidelines under which the Investment Adviser determines and monitors the
liquidity of portfolio securities, subject to the oversight of the Trustees.
Investing in restricted securities eligible for resale pursuant to Rule 144A
may decrease the liquidity of a Fund's portfolio to the extent that qualified
institutional buyers become for a time uninterested in purchasing these
restricted securities. The purchase price and subsequent valuation of
restricted and illiquid securities normally reflect a discount, which may be
significant, from the market price of comparable securities for which a liquid
market exists.
 
REPURCHASE AGREEMENTS
 
  Each Fund may enter into repurchase agreements with dealers in U.S.
Government securities and member banks of the Federal Reserve System which
furnish collateral at least equal in value or market price to the amount of
their repurchase obligation. The Balanced Fund may also enter into repurchase
agreements involving certain foreign government securities. If the other party
or "seller" defaults, a Fund might suffer a loss to the extent that the
proceeds from the sale of the underlying securities and other collateral held
by the Fund in connection with the related repurchase agreement are less than
the repurchase price. In addition, in the event of bankruptcy of the seller or
failure of the seller to repurchase the securities as agreed, a Fund could
suffer losses, including loss of interest on or principal of the security and
costs associated with delay and enforcement of the repurchase agreement. The
Trustees have reviewed and approved certain counterparties whom they believe
to be creditworthy and have authorized the Funds to enter into repurchase
agreements with such counterparties. In addition, each Fund, together with
other registered investment companies having management agreements with an
Investment Adviser or its affiliates, may transfer uninvested cash balances
into a single joint account, the daily aggregate balance of which will be
invested in one or more repurchase agreements.
 
LENDING OF PORTFOLIO SECURITIES
 
  Each Fund may also seek to increase its income by lending portfolio
securities. Under present regulatory policies, such loans may be made to
institutions, such as certain broker-dealers, and are required to be secured
continuously by collateral in cash, cash equivalents, or U.S. Government
securities maintained on a current basis in an amount at least equal to the
market value of the securities loaned. Cash collateral may be invested in cash
equivalents. If the Investment Adviser determines to make securities loans,
the value of the securities loaned may not exceed 33 1/3% of the value of the
total assets of a Fund (including the loan collateral). A Fund may experience
a loss or delay in the recovery of its securities if the institution with
which it has engaged in a portfolio loan transaction breaches its agreement
with the Fund.
 
MORTGAGE DOLLAR ROLLS
 
  The Balanced Fund may enter into mortgage "dollar rolls" in which the Fund
sells securities for delivery in the current month and simultaneously
contracts with the same counterparty to repurchase substantially similar (same
type, coupon and maturity) but not identical securities on a specified future
date. During the roll period, the Fund loses the right to receive principal
and interest paid on the securities sold. However, the Fund would benefit to
the extent of any difference between the price received for the securities
sold and the lower forward price for the future purchase or fee income plus
the interest earned on the cash proceeds of the securities sold until the
settlement date for the forward purchase. Unless such benefits exceed the
income, capital appreciation and gain or loss due to mortgage prepayments that
would have been realized on the securities sold as part of the mortgage dollar
roll, the use of this technique will diminish the investment performance of
the Fund. The Fund
 
                                      29
<PAGE>
 
will segregate cash or liquid assets in an amount equal to the forward
purchase price until the settlement date. Successful use of mortgage dollar
rolls depends upon the Investment Adviser's ability to predict correctly
interest rates and mortgage prepayments. There is no assurance that mortgage
dollar rolls can be successfully employed. For financial reporting and tax
purposes, the Fund treats mortgage dollar rolls as two separate transactions:
one involving the purchase of a security and a separate transaction involving
a sale. The Fund does not currently intend to enter into mortgage dollar rolls
that are accounted for as a financing.
 
SHORT SALES AGAINST-THE-BOX
 
  Each Fund (other than the CORE Funds) may make short sales of securities or
maintain a short position, provided that at all times when a short position is
open the Fund owns an equal amount of such securities or securities
convertible into or exchangeable for, without payment of any further
consideration, an equal amount of the securities of the same issuer as the
securities sold short (a short sale against-the-box). Not more than 25% of a
Fund's net assets (determined at the time of the short sale) may be subject to
such short sales. As a result of recent tax legislation, short sales may not
generally be used to defer the recognition of gain for tax purposes with
respect to appreciated securities in a Fund's portfolio.
 
TEMPORARY INVESTMENTS
 
  Each Fund may, for temporary defensive purposes, invest 100% of its total
assets (except that the CORE Funds may only hold up to 35% of their respective
total assets) in U.S. Government securities, repurchase agreements
collateralized by U.S. Government securities, commercial paper rated at least
A-2 by Standard & Poor's or P-2 by Moody's, certificates of deposit, bankers'
acceptances, repurchase agreements, non-convertible preferred stocks and non-
convertible corporate bonds with a remaining maturity of less than one year.
When a Fund's assets are invested in such instruments, the Fund may not be
achieving its investment objective.
 
MISCELLANEOUS TECHNIQUES
 
  In addition to the techniques and investments described above, each Fund
may, with respect to no more than 5% of its net assets, engage in the
following techniques and investments: (i) warrants and stock purchase rights;
(ii) currency swaps (Balanced Fund only); (iii) credit swaps, mortgage swaps,
index swaps and interest rate swaps, caps, floors and collars (Balanced Fund
only); (iv) yield curve options and inverse floating rate securities (Balanced
Fund only); (v) other investment companies including World Equity Benchmark
Shares; (vi) unseasoned companies; (vii) municipal securities (Balanced Fund
only); (viii) loan participations (Balanced Fund only); (ix) custodial
receipts; and (x) reverse repurchase agreements for investment purposes
(Balanced Fund only).
 
  In addition, each Fund may borrow up to 33 1/3% of its total assets from
banks for temporary or emergency purposes. A Fund may not make additional
investments if borrowings (excluding covered mortgage dollar rolls) exceed 5%
of its total assets. For more information see the Additional Statement.
 
 
                                 RISK FACTORS
 
  Risks of Investing in Equity Securities. In general, the Funds are subject
to the risks associated with investments in common stocks and other equity
securities. Stock values fluctuate in response to the activities of individual
companies and in response to general market and economic conditions and,
accordingly, the value of the stocks that a Fund holds may decline over short
or extended periods. The U.S. stock markets tend to be cyclical, with periods
when stock prices generally rise and periods when prices generally decline. As
of the date of this Prospectus, domestic stock markets were trading at or
close to record high levels and there can be no guarantee that such levels
will continue.
 
                                      30
<PAGE>
 
  RISKS OF INVESTING IN SMALL CAPITALIZATION COMPANIES. Investing in the
securities of such companies involves greater risk and the possibility of
greater portfolio price volatility. Historically, small market capitalization
stocks and stocks of recently organized companies have been more volatile in
price than the larger market capitalization stocks included in the S&P 500
Index. Among the reasons for the greater price volatility of these small
company and unseasoned stocks are the less certain growth prospects of smaller
firms and the lower degree of liquidity in the markets for such stocks.
 
  SPECIAL RISKS OF INVESTMENTS IN EMERGING MARKETS. Investing in the
securities of issuers in Emerging Countries involves risks in addition to
those discussed under "Description of Securities-- Foreign Investments." The
Growth and Income, Mid Cap Equity and Small Cap Value Funds may each invest up
to 25%, the Balanced Fund may invest up to 20% and the Capital Growth Fund may
invest up to 10% of their respective total assets in securities of issuers in
Emerging Countries. Emerging Countries are generally located in the Asia-
Pacific region, Eastern Europe, Latin and South America and Africa.
 
  Foreign investment in the securities markets of certain Emerging Countries
is restricted or controlled to varying degrees which may limit investment in
such countries or increase the administrative costs of such investments.
Certain countries may restrict or prohibit investment opportunities in issuers
or industries deemed important to national interests. Such restrictions may
affect the market price, liquidity and rights of securities that may be
purchased by a Fund. The repatriation of both investment income and capital
from certain Emerging Countries is subject to restrictions such as the need
for governmental consents. Many Emerging Countries may be subject to a greater
degree of economic, political and social instability than is the case in
Western Europe, the United States, Canada, Australia, New Zealand and Japan.
Many Emerging Countries do not have fully democratic governments. For example,
governments of some Emerging Countries are authoritarian in nature or have
been installed or removed as a result of military coups, while governments in
other Emerging Countries have periodically used force to suppress civil
dissent. Many Emerging Countries have experienced currency devaluations and
substantial and, in some cases, extremely high rates of inflation, which have
a negative effect on the economies and securities markets of such Emerging
Countries. Settlement procedures in Emerging Countries are frequently less
developed and reliable than those in the United States and may involve a
Fund's delivery of securities before receipt of payment for their sale. In
addition, significant delays are common in certain markets in registering the
transfer of securities. Settlement or registration problems may make it more
difficult for a Fund to value its portfolio securities and could cause the
Fund to miss attractive investment opportunities, to have a portion of its
assets uninvested or to incur losses due to the failure of a counterparty to
pay for securities the Fund has delivered or the Fund's inability to complete
its contractual obligations.
 
  RISKS OF INVESTING IN FIXED-INCOME SECURITIES. When interest rates decline,
the market value of fixed-income securities tends to increase. Conversely,
when interest rates increase, the market value of fixed income securities
tends to decline. Volatility of a security's market value will differ
depending upon the security's duration, the issuer and the type of instrument.
Investments in fixed-income securities are subject to the risk that the issuer
could default on its obligations and a Fund could sustain losses on such
investments. A default could impact both interest and principal payments.
 
  RISKS OF DERIVATIVE TRANSACTIONS. A Fund's transactions, if any, in options,
futures, options on futures, swaps, structured securities and currency
transactions involve certain risks, including a possible lack of correlation
between changes in the value of hedging instruments and the portfolio assets
(if any) being hedged, the potential illiquidity of the markets for derivative
instruments, the risks arising from margin requirements and related leverage
factors associated with such transactions. The use of these management
techniques to seek to increase total return may be regarded as a speculative
practice and involves the risk of loss if the Investment Adviser is incorrect
in its expectation of fluctuations in securities prices, interest rates or
currency prices. A Fund's use of certain derivative transactions may be
limited by the requirements of the Internal Revenue Code of 1986, as amended
(the "Code"), for qualification as a regulated investment company.
 
                                      31
<PAGE>
 
 
                            INVESTMENT RESTRICTIONS
 
  Each Fund is subject to certain investment restrictions that are described
in detail under "Investment Restrictions" in the Additional Statement.
Fundamental investment restrictions of a Fund cannot be changed without
approval of a majority of the outstanding Shares of that Fund as defined in
the Additional Statement. Each Fund's investment objectives and all policies
not specifically designated as fundamental are non-fundamental and may be
changed without shareholder approval. If there is a change in a Fund's
investment objectives, shareholders should consider whether that Fund remains
an appropriate investment in light of their then current financial positions
and needs.
 
 
                              PORTFOLIO TURNOVER
 
  A high rate of portfolio turnover (100% or more) involves correspondingly
greater expenses which must be borne by a Fund and its shareholders. See
"Financial Highlights" for a statement of each Fund's historical portfolio
turnover rate. The portfolio turnover rate is calculated by dividing the
lesser of the dollar amount of sales or purchases of portfolio securities by
the average monthly value of a Fund's portfolio securities, excluding
securities having a maturity at the date of purchase of one year or less. The
Investment Adviser will not consider the portfolio turnover rate a limiting
factor in making investment decisions for a Fund consistent with the Fund's
investment objectives and portfolio management policies.
 
 
                                  MANAGEMENT
 
TRUSTEES AND OFFICERS
 
  The Trustees are responsible for deciding matters of general policy and
reviewing the actions of the Investment Adviser, Distributor and transfer
agent. The officers of the Trust conduct and supervise the Funds' daily
business operations. The Additional Statement contains information as to the
identity of, and other information about, the Trustees and officers of the
Trust.
 
INVESTMENT ADVISERS
 
  INVESTMENT ADVISERS. Goldman Sachs Asset Management, One New York Plaza, New
York, New York 10004, a separate operating division of Goldman Sachs, serves
as investment adviser to the Balanced, Growth and Income, CORE Large Cap
Growth, CORE Small Cap Equity, Mid Cap Equity and Small Cap Value Funds.
Goldman Sachs registered as an investment adviser in 1981. Goldman Sachs Funds
Management, L.P., One New York Plaza, New York, New York 10004, a Delaware
limited partnership which is an affiliate of Goldman Sachs, serves as the
investment adviser to the CORE U.S. Equity and Capital Growth Funds. Goldman
Sachs Funds Management, L.P. registered as an investment adviser in 1990. The
Goldman Sachs Group, L.P., which controls the Investment Advisers, has
announced that it will pursue an initial public offering of the firm during
the fourth quarter of 1998; if the public offering is consummated, The Goldman
Sachs Group, L.P. will merge into the new public company, which will be called
The Goldman Sachs Group, Inc. As of July 24, 1998, GSAM and GSFM together with
their affiliates, acted as investment adviser or distributor for assets in
excess of $168 billion.
 
  Under a Management Agreement with each Fund, the applicable Investment
Adviser, subject to the general supervision of the Trustees, provides day-to-
day advice as to the Fund's portfolio transactions. Goldman Sachs has agreed
to permit the Funds to use the name "Goldman Sachs" or a derivative thereof as
part of each Fund's name for as long as a Fund's Management Agreement is in
effect.
 
                                      32
<PAGE>
 
  In performing its investment advisory services, each Investment Adviser,
while remaining ultimately responsible for the management of the Funds, is
able to draw upon the research and expertise of its asset management
affiliates for portfolio decisions and management with respect to certain
portfolio securities. In addition, the Investment Adviser will have access to
the research of, and certain proprietary technical models developed by,
Goldman Sachs and may apply quantitative and qualitative analysis in
determining the appropriate allocations among the categories of issuers and
types of securities.
 
  Under the Management Agreement, the Investment Adviser also: (i) supervises
all non-advisory operations of each Fund that it advises; (ii) provides
personnel to perform such executive, administrative and clerical services as
are reasonably necessary to provide effective administration of each Fund;
(iii) arranges for at each Fund's expense (a) the preparation of all required
tax returns, (b) the preparation and submission of reports to existing
shareholders, (c) the periodic updating of prospectuses and Additional
Statements and (d) the preparation of reports to be filed with the SEC and
other regulatory authorities; (iv) maintains each Fund's records; and (v)
provides office space and all necessary office equipment and services.
 
 FUND MANAGERS
 
<TABLE>
<CAPTION>
                                                          YEARS
                                                          PRIMARILY
       NAME AND TITLE          FUND RESPONSIBILITY        RESPONSIBLE     FIVE YEAR EMPLOYMENT HISTORY
  ------------------------- --------------------------    ----------- ----------------------------
  <C>                       <C>                           <C>         <S>
  George D. Adler              Senior Portfolio Manager--    Since      Mr. Adler joined the
   Vice President              Capital Growth                1997       Investment Adviser in
                                                                        1997. From 1990 to 1997,
                                                                        he was a portfolio
                                                                        manager at Liberty
                                                                        Investment Management,
                                                                        Inc. From 1988 to 1990
                                                                        he was a director of
                                                                        portfolio management at
                                                                        Banc One in Ohio.
- ------------------------------------------------------------------------------------------------------
  Eileen A. Aptman             Senior Portfolio Manager--    Since      Ms. Aptman joined the
   Vice President              Mid Cap Equity                1996       Investment Adviser in
                               Small Cap Value               1997       1993. From 1990 to 1993,
                                                                        she worked at Delphi
                                                                        Management as an equity
                                                                        analyst, focusing her
                                                                        research efforts on
                                                                        value stocks.
- ------------------------------------------------------------------------------------------------------
  Jonathan A. Beinner          Senior Portfolio Manager--    Since      Mr. Beinner joined the
   Managing Director and       Balanced (Fixed Income)       1994       Investment Adviser in
   Co-Head U.S. Fixed                                                   1990. From 1988 to 1990,
   Income                                                               he worked as a portfolio
                                                                        manager at Franklin
                                                                        Savings Association in
                                                                        the trading and
                                                                        arbitrage group.
- ------------------------------------------------------------------------------------------------------
  Melissa Brown                Senior Portfolio Manager--    Since      Ms. Brown joined the
   Vice President              CORE U.S. Equity              1998       Investment Adviser in
                               CORE Large Cap Growth         1998       1998. From 1984 to 1998,
                               CORE Small Cap Equity         1998       she was the director of
                                                                        Quantitative Equity
                                                                        Research and served on
                                                                        the Investment Policy
                                                                        Committee at Prudential
                                                                        Securities.
- ------------------------------------------------------------------------------------------------------
  Kent A. Clark                Senior Portfolio Manager--    Since      Mr. Clark joined the
   Vice President              CORE U.S. Equity              1996       Investment Adviser in
                               CORE Large Cap Growth         1997       1992.
                               CORE Small Cap Equity         1997
- ------------------------------------------------------------------------------------------------------
  Robert G. Collins            Senior Portfolio Manager--    Since      Mr. Collins joined the
   Vice President              Capital Growth                1997       Investment Adviser in
                                                                        1997. From 1991 to 1997,
                                                                        he was a portfolio
                                                                        manager at Liberty
                                                                        Investment Management,
                                                                        Inc. His past
                                                                        experiences include work
                                                                        as a special situations
                                                                        analyst with Raymond
                                                                        James & Associates for
                                                                        five years.
</TABLE>
 
                                      33
<PAGE>
 
<TABLE>
<CAPTION>
                                                     YEARS
                                                     PRIMARILY
    NAME AND TITLE       FUND RESPONSIBILITY         RESPONSIBLE     FIVE YEAR EMPLOYMENT HISTORY
  ------------------- --------------------------     ----------- ----------------------------
  <C>                 <C>                            <C>         <S>
  Herbert E. Ehlers      Senior Portfolio Manager--     Since      Mr. Ehlers joined the
   Managing Director     Capital Growth                 1997       Investment Adviser in
                                                                   1997. From 1994 to 1997,
                                                                   he was the Chief
                                                                   Investment Officer and
                                                                   Chairman of Liberty
                                                                   Investment Management,
                                                                   Inc. He was a portfolio
                                                                   manager and president at
                                                                   Liberty's predecessor
                                                                   firm, Eagle Asset
                                                                   Management, from 1984 to
                                                                   1994.
- -------------------------------------------------------------------------------------------------
  Gregory H. Ekizian     Senior Portfolio Manager--     Since      Mr. Ekizian joined the
   Vice President        Capital Growth                 1997       Investment Adviser in
                                                                   1997. From 1990 to 1997,
                                                                   he was a portfolio
                                                                   manager at Liberty
                                                                   Investment Management,
                                                                   Inc. and its predecessor
                                                                   firm, Eagle Asset
                                                                   Management.
- -------------------------------------------------------------------------------------------------
  Paul D. Farrell        Senior Portfolio Manager--     Since      Mr. Farrell joined the
   Vice President        Mid Cap Equity                 1998       Investment Adviser in
                         Small Cap Value                1992       1991. In 1998, he became
                                                                   responsible for managing
                                                                   the Investment Adviser's
                                                                   Value team. During 1991,
                                                                   he served as a managing
                                                                   director at Plaza
                                                                   Investment Managers, the
                                                                   investment subsidiary of
                                                                   GEICO Corp., a major
                                                                   insurance company. From
                                                                   1986 to 1991, he was
                                                                   employed by Goldman
                                                                   Sachs as a vice
                                                                   president in the
                                                                   investment research
                                                                   department and was
                                                                   responsible for the
                                                                   formation of the firm's
                                                                   Emerging Growth Research
                                                                   Group.
- -------------------------------------------------------------------------------------------------
  Greg Gigliotti         Senior Portfolio Manager--     Since      Mr. Gigliotti joined the
   Vice President        Growth and Income              1998       Investment Adviser in
                         Balanced (Equity)              1998       1997. From 1996 to 1997
                         Mid Cap Equity                 1998       he was a Vice President
                                                                   and senior analyst at
                                                                   Franklin Mutual
                                                                   Advisors, Inc., the
                                                                   asset management
                                                                   division of Franklin
                                                                   Resources, Inc. From
                                                                   1989 to 1996 he was a
                                                                   Vice President and
                                                                   senior analyst at Heine
                                                                   Securities Corporation
                                                                   which was purchased by
                                                                   Franklin Resources, Inc.
- -------------------------------------------------------------------------------------------------
  Robert C. Jones         Senior Portfolio Manager--    Since      Mr. Jones joined the
   Managing Director      CORE U.S. Equity              1991       Investment Adviser in
                          CORE Large Cap Growth         1997       1989. From 1987 to 1989,
                          CORE Small Cap Equity         1997       he was the senior
                                                                   quantitative analyst in
                                                                   the Goldman Sachs
                                                                   Investment Research
                                                                   Department and the
                                                                   author of the monthly
                                                                   Stock Selection
                                                                   publication.
- -------------------------------------------------------------------------------------------------
  Richard C. Lucy         Senior Portfolio Manager--    Since      Mr. Lucy joined the
   Vice President and     Balanced (Fixed Income)       1994       Investment Adviser in
   Co-Head U.S.                                                    1992. From 1983 to 1992,
   Fixed Income                                                    he managed fixed income
                                                                   assets at Brown Brothers
                                                                   Harriman & Co.
- -------------------------------------------------------------------------------------------------
  Matthew B. McLennan     Senior Portfolio Manager--    Since      Mr. McLennan joined the
   Vice President         Mid Cap Equity                1998       Investment Adviser in
                          Small Cap Value               1996       1995. From 1994 to 1995,
                                                                   he worked in the
                                                                   Investment Banking
                                                                   Division of Goldman
                                                                   Sachs in Australia. From
                                                                   1991 to 1994, Mr.
                                                                   McLennan worked at
                                                                   Queensland Investment
                                                                   Corporation in
                                                                   Australia.
- -------------------------------------------------------------------------------------------------
  Victor H. Pinter        Senior Portfolio Manager--    Since      Mr. Pinter joined the
   Vice President         CORE U.S. Equity              1996       Investment Adviser in
                          CORE Large Cap Growth         1997       1990. From 1985 to 1990,
                          CORE Small Cap Equity         1997       he was a project manager
                                                                   in the Information
                                                                   Technology Division of
                                                                   the Investment Adviser.
</TABLE>
 
 
                                       34
<PAGE>
 
<TABLE>
<CAPTION>
                                                        YEARS
                                                        PRIMARILY
      NAME AND TITLE        FUND RESPONSIBILITY         RESPONSIBLE     FIVE YEAR EMPLOYMENT HISTORY
  ---------------------- --------------------------     ----------- ----------------------------
  <C>                    <C>                            <C>         <S>
  Thomas S. Price            Senior Portfolio Manager--    Since      Mr. Price joined the
   Vice President            Growth and Income             1998       Investment Adviser in
                             Balanced (Equity)             1998       1997. From 1996 to 1997
                             Mid Cap Equity                1998       he was a Vice President
                                                                      and senior analyst at
                                                                      Franklin Mutual
                                                                      Advisors, Inc., the
                                                                      asset management
                                                                      division of Franklin
                                                                      Resources, Inc. From
                                                                      1993 to 1996 he was a
                                                                      Vice President and
                                                                      senior analyst at Heine
                                                                      Securities Corporation
                                                                      which was purchased by
                                                                      Franklin Resources, Inc.
- ----------------------------------------------------------------------------------------------------
  David G. Shell             Senior Portfolio Manager--    Since      Mr. Shell joined the
   Vice President            Capital Growth                1997       Investment Adviser in
                                                                      1997. From 1987 to 1997,
                                                                      he was a portfolio
                                                                      manager at Liberty
                                                                      Investment Management,
                                                                      Inc. and its predecessor
                                                                      firm, Eagle Asset
                                                                      Management.
- ----------------------------------------------------------------------------------------------------
  Ernest C. Segundo, Jr.     Senior Portfolio Manager--    Since      Mr. Segundo joined the
   Vice President            Capital Growth                1997       Investment Adviser in
                                                                      1997. From 1992 to 1997,
                                                                      he was a portfolio
                                                                      manager at Liberty
                                                                      Investment Management,
                                                                      Inc. From 1990 to 1992,
                                                                      he was an equity
                                                                      research analyst with
                                                                      Fidelity Management &
                                                                      Research Company.
- ----------------------------------------------------------------------------------------------------
  Lawrence S. Sibley         Senior Portfolio Manager--    Since      Mr. Sibley joined the
   Vice President            Growth and Income             1997       Investment Adviser in
                             Balanced (Equity)             1997       1997. From 1994 to 1997,
                             Mid Cap Equity                1997       he headed Institutional
                                                                      Equity Sales at J.P.
                                                                      Morgan Securities and
                                                                      from 1987 to 1994, he
                                                                      was a principal of
                                                                      Sanford C. Bernstein &
                                                                      Co. in its Institutional
                                                                      Sales Department.
- ----------------------------------------------------------------------------------------------------
  Karma Wilson              Senior Portfolio Manager--     Since      Ms. Wilson joined the
   Vice President           Growth and Income              1998       Investment Adviser in
                            Balanced (Equity)              1998       1994. Prior to 1994, she
                            Mid Cap Equity                 1998       was an investment
                                                                      analyst with Bankers
                                                                      Trust Australia Ltd.
                                                                      Before 1992 she was
                                                                      employed at Arthur
                                                                      Andersen LLP.
</TABLE>
  It is the responsibility of the Investment Adviser to make the investment
decisions for a Fund and to place the purchase and sale orders for the Fund's
portfolio transactions in U.S. and foreign markets. Such orders may be
directed to any broker including, to the extent and in the manner permitted by
applicable law, Goldman Sachs or its affiliates. In effecting purchases and
sales of portfolio securities for the Funds, the Investment Adviser will seek
the best price and execution of a Fund's orders. In doing so, where two or
more brokers or dealers offer comparable prices and execution for a particular
trade, consideration may be given to whether the broker or dealer provides
investment research or brokerage services or sells Shares of any Goldman Sachs
Fund. See the Additional Statement for a further description of the Investment
Adviser's brokerage allocation practices.
 
  As compensation for its services rendered and assumption of certain expenses
pursuant to separate Management Agreements, GSAM and GSFM are entitled to the
following fees, computed daily and payable monthly at the annual rates listed
below:
<TABLE>
<CAPTION>
                                                               FOR THE FISCAL
                                                CONTRACTUAL YEAR OR PERIOD ENDED
                                                   RATE*     JANUARY 31, 1998*
                                                ----------- --------------------
     <S>                                        <C>         <C>
     GSAM
     ----
     Balanced..................................    0.65%           0.65%
     Growth and Income.........................    0.70%           0.70%
     CORE Large Cap Growth.....................    0.75%           0.60%
     CORE Small Cap Equity.....................    0.85%           0.75%
     Mid Cap Equity............................    0.75%           0.75%
     Small Cap Value...........................    1.00%           1.00%
     GSFM
     ----
     CORE U.S. Equity..........................    0.75%           0.59%
     Capital Growth............................    1.00%           1.00%
</TABLE>
                                                       (footnotes on next page)
 
                                      35
<PAGE>
 
- ---------------------
*All numbers are annualized. The difference, if any, between the stated fees
and the actual fees paid by the Funds reflects that the applicable Investment
Adviser did not charge the full amount of the fees to which it would have been
entitled. Effective September 1, 1998, the management fee for the CORE U.S.
Equity and CORE Small Cap Equity Funds will equal 0.70% and 0.85%,
respectively. The Investment Adviser may discontinue or modify any limitations
in the future at its discretion.
 
  The Investment Adviser has voluntarily agreed to reduce or limit certain
"Other Expenses" of the Funds (excluding management fees, service fees,
transfer agency fees, taxes, interest and brokerage fees and litigation,
indemnification and other extraordinary expenses) to the extent such expenses
exceed 0.01%, 0.05%, 0.00%, 0.00%, 0.04%, 0.00%, 0.10% and 0.06% per annum of
the average daily net assets of the Balanced, Growth and Income, CORE U.S.
Equity, CORE Large Cap Growth, CORE Small Cap Equity, Capital Growth, Mid Cap
Equity and Small Cap Value Funds, respectively. Such reductions or limits, if
any, may be discontinued or modified by the applicable Investment Adviser in
its discretion at any time.
 
  ACTIVITIES OF GOLDMAN SACHS AND ITS AFFILIATES AND OTHER ACCOUNTS MANAGED BY
GOLDMAN SACHS. The involvement of the Investment Adviser, Goldman Sachs and
their affiliates in the management of, or their interest in, other accounts
and other activities of Goldman Sachs may present conflicts of interest with
respect to a Fund or limit a Fund's investment activities. Goldman Sachs and
its affiliates engage in proprietary trading and advise accounts and funds
which have investment objectives similar to those of the Funds and/or which
engage in and compete for transactions in the same type of securities,
currencies and instruments as the Funds. Goldman Sachs and its affiliates will
not have any obligation to make available any information regarding their
proprietary activities or strategies, or the activities or strategies used for
other accounts managed by them, for the benefit of the management of the
Funds. The results of a Fund's investment activities, therefore, may differ
from those of Goldman Sachs and its affiliates and it is possible that a Fund
could sustain losses during periods in which Goldman Sachs and its affiliates
and other accounts achieve significant profits on their trading for
proprietary or other accounts. In addition, the Funds may, from time to time,
enter into transactions in which other clients of
Goldman Sachs have an adverse interest. From time to time, a Fund's activities
may be limited because of regulatory restrictions applicable to Goldman Sachs
and its affiliates, and/or their internal policies designed to comply with
such restrictions. See "Management--Activities of Goldman Sachs and its
Affiliates and Other Accounts Managed by Goldman Sachs" in the Additional
Statement for further information.
 
DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs, 85 Broad Street, New York, New York 10004, serves as the
exclusive distributor (the "Distributor") of each Fund's Shares. Goldman
Sachs, 4900 Sears Tower, Chicago, Illinois 60606, also serves as each Fund's
transfer agent (the "Transfer Agent") and as such performs various shareholder
servicing functions. Shareholders with inquiries regarding a Fund should
contact Goldman Sachs (as Transfer Agent) at the address or the telephone
number set forth on the back cover page of this Prospectus. Goldman Sachs is
entitled to receive a transfer agency fee with respect to each Fund's
Institutional and Service Shares equal, on an annual basis, to 0.04% of
average daily net assets.
 
  From time to time, Goldman Sachs or any of its affiliates may purchase and
hold Shares of the Funds. Goldman Sachs reserves the right to redeem at any
time some or all of the Shares acquired for its own account.
 
YEAR 2000
 
  Many computer systems were designed using only two digits to signify the
year (for example, "98" for "1998"). On January 1, 2000, if these computer
systems are not corrected, they may incorrectly interpret "00"
 
                                      36
<PAGE>
 
as the year "1900" rather than the year "2000," leading to computer shutdowns
or errors (commonly known as the "Year 2000 Problem"). To the extent these
systems conduct forward-looking calculations, these computer problems may
occur prior to January 1, 2000. Like other investment companies and financial
and business organizations, the Funds could be adversely affected in their
ability to process securities trades, price securities, provide shareholder
account services and otherwise conduct normal business operations if the
computer systems used by the Investment Adviser or other Fund service
providers do not adequately address this problem in a timely manner. The
Investment Adviser has established a dedicated group to analyze these issues
and to implement the systems modifications necessary to prepare for the Year
2000 Problem. Currently, the Investment Adviser does not anticipate that the
transition to the 21st Century will have any material impact on its ability to
continue to service the Funds at current levels. In addition, the Investment
Adviser has sought assurances from the Funds' other service providers that
they are taking the steps necessary so that they do not experience Year 2000
Problems, and the Investment Adviser will continue to monitor the situation.
At this time, however, no assurance can be given that the actions taken by the
Investment Adviser and the Funds' other service providers will be sufficient
to avoid any adverse effect on the Funds due to the Year 2000 Problem.
 
 
                                   EXPENSES
 
  The Funds are responsible for the payment of their expenses. The expenses
include, without limitation; fees payable to the Investment Adviser; custodial
and transfer agency fees; service fees paid to Service Organizations;
brokerage fees and commissions; filing fees for the registration or
qualification of the Funds' Shares under federal or state securities laws,
organizational expenses; fees and expenses incurred in connection with
membership in investment company organizations; taxes; interest; costs of
liability insurance, fidelity bonds or indemnification; any costs, expenses or
losses arising out of any liability of, or claim for damages or other relief
asserted against, the Funds for violation of any law; legal and auditing fees
and expenses (including the cost of legal and certain accounting services
rendered by employees of the Investment Adviser and its affiliates with
respect to the Funds); expenses of preparing and setting in type prospectuses,
Additional Statements, proxy material, financial reports and notices and the
printing and distributing of the same to shareholders and regulatory
authorities; compensation and expenses of the Trust's "non-interested"
Trustees; and extraordinary organizational expenses, if any, incurred by the
Trust.
 
 
                                NET ASSET VALUE
 
  The NAV per Share of each Class of a Fund is calculated by the Fund's
custodian as of the close of regular trading on the New York Stock Exchange
(which is normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m. New York
time), on each Business Day (as such term is defined under "Additional
Information"). NAV per Share of each Class is calculated by determining the
net assets attributed to each Class and dividing by the number of outstanding
Shares of that Class. Portfolio securities are valued based on market
quotations or, if accurate quotations are not readily available, at fair value
as determined in good faith under procedures established by the Trustees.
 
                                      37
<PAGE>
 
 
                            PERFORMANCE INFORMATION
 
  From time to time each Fund may publish average annual total return and the
Balanced and Growth and Income Funds may publish their yield and distribution
rates in advertisements and communications to shareholders or prospective
investors. Average annual total return is determined by computing the average
annual percentage change in value of $1,000 invested at the maximum public
offering price for specified periods ending with the most recent calendar
quarter, assuming reinvestment of all dividends and distributions at NAV. The
total return calculation assumes a complete redemption of the investment at
the end of the relevant period. Each Fund may also from time to time advertise
total return on a cumulative, average, year-by-year or other basis for various
specified periods by means of quotations, charts, graphs or schedules. In
addition, each Fund may furnish total return calculations based on investments
at various sales charge levels or at NAV. Any performance information which is
based on the NAV per Share would be reduced if any applicable sales charge
were taken into account. In addition to the above, each Fund may from time to
time advertise its performance relative to certain averages, performance
rankings, indices, other information prepared by recognized mutual fund
statistical services and investments for which reliable performance
information is available.
 
  The Balanced and Growth and Income Funds compute their yield by dividing net
investment income earned during a recent thirty-day period by the product of
the average daily number of Shares outstanding and entitled to receive
dividends during the period and the maximum offering price per Share on the
last day of the relevant period. The results are compounded on a bond
equivalent (semi-annual) basis and then annualized. Net investment income per
Share is equal to the dividends and interest earned during the period, reduced
by accrued expenses for the period. The calculation of net investment income
for these purposes may differ from the net investment income determined for
accounting purposes. The Balanced and Growth and Income Funds' quotations of
distribution rate are calculated by annualizing the most recent distribution
of net investment income for a monthly, quarterly or other relevant period and
dividing this amount by the NAV per Share on the last day of the period for
which the distribution rate is being calculated.
 
  Each Fund's total return, yield and distribution rate will be calculated
separately for each Class of Shares in existence. Because each Class of Shares
may be subject to different expenses, the total return, yield and distribution
rate calculations with respect to each Class of Shares for the same period
will differ. See "Shares of the Trust."
 
  The Funds' performance quotations do not reflect any fees charged by a
Service Organization to its customer accounts in connection with investments
in the Funds. The investment results of a Fund will fluctuate over time and
any presentation of investment results for any prior period should not be
considered a representation of what an investment may earn or what the Fund's
performance may be in any future period. In addition to information provided
in shareholder reports, the Funds may, in their discretion, from time to time
make a list of their holdings available to investors upon request.
 
 
                              SHARES OF THE TRUST
 
  Each Fund is a series of Goldman Sachs Trust, which was formed under the
laws of the State of Delaware on January 28, 1997. The Funds were formerly
series of Goldman Sachs Equity Portfolios, Inc., a Maryland corporation, and
were reorganized into the Trust as of April 30, 1997. The Trustees have
authority under the Trust's Declaration of Trust to create and classify Shares
of beneficial interests in separate series, without further
 
                                      38
<PAGE>
 
action by shareholders. Additional series may be added in the future. The
Trustees also have authority to classify and reclassify any series or
portfolio of Shares into one or more Classes. Information about the Trust's
other series and Classes is contained in separate prospectuses.
 
  When issued, Shares are fully paid and non-assessable. In the event of
liquidation, shareholders of each class are entitled to share pro rata in the
net assets of the applicable Fund available for distribution to the
shareholders of such Class. All Shares are freely transferable and have no
preemptive, subscription or conversion rights. Shareholders are entitled to
one vote per Share, provided that, at the option of the Trustees, shareholders
will be entitled to a number of votes based upon the NAVs represented by their
Shares.
 
  As of April 3, 1998, State Street Bank and Trust Company as Trustee for
Goldman Sachs Profit Sharing Master Trust, Attention: Louis Pereira, P.O. Box
1992, Boston, MA 02105-1992 was recordholder of 59.9% of Mid Cap Equity Fund's
outstanding Shares.
 
  The Trust does not intend to hold annual meetings of shareholders. However,
recordholders may, under certain circumstances, as permitted by the Act,
communicate with other shareholders in connection with requiring a special
meeting of shareholders. The Trustees will call a special meeting of
shareholders for the purpose of electing Trustees if, at any time, less than a
majority of Trustees holding office at the time were elected by shareholders.
 
  In the interest of economy and convenience, the Trust does not issue
certificates representing the Funds' Shares. Instead, the Transfer Agent
maintains a record of each shareholder's ownership. Each shareholder receives
confirmation of purchase and redemption orders from the Transfer Agent. Fund
Shares and any dividends and distributions paid by the Fund are reflected in
account statements from the Transfer Agent.
 
 
                                   TAXATION
 
FEDERAL TAXES
 
  Each Fund is treated as a separate entity for tax purposes. Each Fund has
elected to be treated as a regulated investment company and each Fund intends
to continue to qualify for such treatment for each taxable year under
Subchapter M of the Code. To qualify as such, a Fund must satisfy certain
requirements relating to the sources of its income, diversification of its
assets and distribution of its income to shareholders. As a regulated
investment company, a Fund will not be subject to federal income or excise tax
on any net investment income and net realized capital gains that are
distributed to its shareholders in accordance with certain timing requirements
of the Code.
 
  Dividends paid by a Fund from net investment income, certain net realized
foreign exchange gains, the excess of net short-term capital gain over net
long-term capital loss and original issue discount or market discount income
will be taxable to its shareholders as ordinary income. Distributions out of
the net capital gain (the excess of net long-term capital gain over net short-
term capital loss), if any, of a Fund will be taxed to shareholders as long-
term capital gains, regardless of the length of time a shareholder has held
his or her Shares or whether such gain was reflected in the price paid for the
Shares. These tax consequences will apply whether distributions are received
in cash or reinvested in Shares. A Fund's dividends that are paid to its
corporate shareholders and are attributable to qualifying dividends such Fund
receives from U.S. domestic corporations may be eligible, in the
 
                                      39
<PAGE>
 
hands of such corporate shareholders, for the corporate dividends-received
deduction, subject to certain holding period requirements and debt financing
limitations under the Code. Certain distributions paid by a Fund in January of
a given year may be taxable to shareholders as if received the prior December
31. Shareholders will be informed annually about the amount and character of
distributions received from the Funds for federal income tax purposes.
 
  Investors should consider the tax implications of buying Shares immediately
prior to a distribution. Investors who purchase Shares shortly before the
record date for a distribution will pay a per Share price that includes the
value of the anticipated distribution and will be taxed on the distribution
even though the distribution represents a return of a portion of the purchase
price.
 
  Redemptions and exchanges of Shares are taxable events.
 
  Individuals and certain other classes of shareholders may be subject to 31%
backup withholding of federal income tax on distributions, redemptions and
exchanges if they fail to furnish their correct taxpayer identification number
and certain certifications required by the Internal Revenue Service or if they
are otherwise subject to backup withholding. Individuals, corporations and
other shareholders that are not U.S. persons under the Code are subject to
different tax rules and may be subject to nonresident alien withholding at the
rate of 30% (or a lower rate provided by an applicable tax treaty, if any) on
amounts treated as ordinary dividends from the Funds.
 
  Each Fund may be subject to foreign withholding or other foreign taxes on
income or gain from certain foreign securities. In general, the Funds do not
anticipate that they will be eligible to pass any foreign tax credits through
to their shareholders; however, the Funds may deduct these taxes in computing
their taxable income, if any.
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local
or foreign taxes on payments received from the Funds. A state income (and
possibly local income and/or intangible property) tax exemption may be
available to the extent (if any) a Fund's distributions are derived from
interest on (or, in the case of intangible property taxes, the value of its
assets is attributable to) certain U.S. Government obligations, provided in
some states that certain thresholds for holdings of such obligations and/or
reporting requirements are satisfied. For a further discussion of certain tax
consequences of investing in Shares of the Funds, see "Taxation" in the
Additional Statement. Shareholders are urged to consult their own tax advisers
regarding specific questions as to federal, state and local taxes as well as
to any foreign taxes.
 
 
                            ADDITIONAL INFORMATION
 
  As used in this Prospectus, the term "Business Day" means any day the New
York Stock Exchange is open for trading, which is Monday through Friday except
for holidays. The New York Stock Exchange is closed on the following holidays:
New Year's Day, Martin Luther King, Jr. Day, Presidents' Day (observed), Good
Friday, Memorial Day (observed), Independence Day, Labor Day, Thanksgiving Day
and Christmas Day.
 
                                      40
<PAGE>
 
 
                            REPORTS TO SHAREHOLDERS
 
 
  Recordholders of Institutional Shares of the Funds will receive an annual
report containing audited financial statements and a semi-annual report. To
eliminate unnecessary duplication, only one copy of such reports may be sent to
recordholders with the same mailing address. Recordholders who desire a
duplicate copy of such reports to be mailed to their residence should contact
Goldman Sachs at 800-621-2550. Each recordholder of Institutional Shares will
also be provided with a printed confirmation for each transaction in its
account and a quarterly account statement. A year-to-date statement for any
account will be provided upon request made to Goldman Sachs. The Funds do not
generally provide subaccounting services with respect to beneficial ownership
of Institutional Shares.
 
 
                                   DIVIDENDS
 
 
  Each dividend from net investment income and capital gain distributions, if
any, declared by a Fund on its outstanding Institutional Shares will, at the
election of each shareholder, be paid: (i) in cash; or (ii) in additional
Institutional Shares of such Fund. This election should initially be made on a
shareholder's Account Information Form and may be changed upon written notice
to Goldman Sachs at any time prior to the record date for a particular dividend
or distribution. If no election is made, all dividends from net investment
income and capital gain distributions will be reinvested in Institutional
Shares of the applicable Fund.
 
  The election to reinvest dividends and distributions paid by a Fund in
additional Institutional Shares of the Fund will not affect the tax treatment
of such dividends and distributions, which will be treated as received by the
shareholder and then used to purchase Institutional Shares of a Fund.
 
  Each Fund intends that all or substantially all its net investment income and
net capital gains, after reduction by available capital losses, including any
capital losses carried forward from prior years, will be declared as dividends
for each taxable year. The Balanced and Growth and Income Funds will pay
dividends from net investment income quarterly. Each other Fund will pay
dividends from net investment income, and dividends from net realized capital
gains, reduced by available capital losses, at least annually. From time to
time, a portion of a Fund's dividends may constitute a return of capital.
 
  At the time of an investor's purchase of Shares of a Fund, a portion of the
NAV per Share may be represented by undistributed income of the Fund or
realized or unrealized appreciation of the Fund's portfolio securities.
Therefore, subsequent distributions on such Shares from such income or realized
appreciation may be taxable to the investor even if the NAV of the investor's
Shares is, as a result of the distributions, reduced below the cost of such
Shares and the distributions (or portions thereof) represent a return of a
portion of the purchase price.
 
 
                        PURCHASE OF INSTITUTIONAL SHARES
 
 
  Institutional Shares may be purchased on any Business Day at the NAV per
Share next determined after receipt of an order. No sales load will be charged.
Currently, the NAV is determined as of the close of regular trading on the New
York Stock Exchange (which is normally, but not always, 3:00 p.m. Chicago time,
4:00 p.m. New York time), as described under "Net Asset Value." Purchases of
Institutional Shares of the Funds must be
 
                                       41
<PAGE>
 
settled within three (3) Business Days of the receipt of a complete purchase
order. Payment of the proceeds of redemption of Shares purchased by check may
be delayed for a period of time as described under "Redemption of Institutional
Shares."
 
  Prior to making an initial investment in a Fund, an investor must open an
account with a Fund by furnishing necessary information to the Fund or Goldman
Sachs. An Account Information Form, a copy of which is attached to this
Prospectus, should be used to open such an account. Subsequent purchases may be
made in the manner set forth below.
 
PURCHASE PROCEDURES
 
  Purchases of Institutional Shares may be made by qualified investors by
placing an order with Goldman Sachs at 800-621-2550 and either wiring federal
funds to State Street Bank and Trust Company ("State Street") or initiating an
ACH transfer. Purchases may also be made by check (except that the Trust will
not accept a check drawn on a foreign bank or a third party check) or Federal
Reserve draft made payable to "Goldman Sachs Domestic Equity Funds--Name of
Fund and Class of Shares" and should be directed to "Goldman Sachs Domestic
Equity Funds--Name of Fund and Class of Shares," c/o National Financial Data
Services, Inc. ("NFDS"), P.O. Box 419711, Kansas City, MO 64141-6711.
 
MINIMUM INITIAL INVESTMENTS
 
  Institutional Shares of the Fund are offered to: (a) banks, trust companies
or other types of depository institutions investing for their own account or on
behalf of their clients; (b) pension and profit sharing plans, pension funds
and other company-sponsored benefit plans; (c) any state, county, city or any
instrumentality, department, authority or agency thereof; (d) corporations and
other for-profit business organizations with assets of at least $100 million or
publicly traded securities outstanding; (e) "wrap" accounts for the benefit of
clients of broker-dealers, financial institutions or financial planners,
provided that they have entered into an agreement with GSAM specifying
aggregate minimums and certain operating policies and standards; and (f)
registered investment advisers investing for accounts for which they receive
asset-based fees. With respect to these investors, the minimum initial
investment is $1,000,000 in Institutional Shares of a Fund alone or in
combination with other assets under the management of GSAM and its affiliates.
 
  The minimum initial investment in Institutional Shares for (a) individual
investors; (b) qualified non-profit organizations, charitable trusts,
foundations and endowments; and (c) accounts over which GSAM or its advisory
affiliates have investment discretion is $10,000,000.
 
  The foregoing minimum investment requirements may be waived at the discretion
of the Trust's officers. In addition, the minimum investment requirement may be
waived for current and former officers, partners, directors or employees of
Goldman Sachs or any of its affiliates or for other investors at the discretion
of the Trust's officers. No minimum amount is required for subsequent
investments.
 
OTHER PURCHASE INFORMATION
 
  The Trust may authorize certain institutions (including banks, trust
companies, brokers and investment advisers) that provide recordkeeping,
reporting and processing services to their customers to accept on the Trust's
 
                                       42
<PAGE>
 
behalf purchase, redemption and exchange orders placed by or on behalf of such
customers and, if approved by the Trust, to designate other intermediaries to
accept such orders. In these cases, a Fund will be deemed to have received an
order in proper form by or on behalf of a customer when the order is accepted
by the authorized institution or intermediary on a Business Day, and the order
will be priced at a Fund's NAV per Share next determined after such acceptance.
The institution or intermediary will be responsible for transmitting accepted
orders to the Trust within the period agreed upon by them. A customer should
contact an institution to learn whether it is authorized to accept orders for
the Trust. Such institutions may receive payments from the Funds or Goldman
Sachs for the services provided by them with respect to the Funds'
Institutional Shares. These payments may be in addition to other servicing
and/or sub-transfer agency payments borne by the Funds and their Share classes.
 
  The Investment Adviser, Distributor, and/or their affiliates also pay
additional compensation, from time to time, out of their assets and not as an
additional charge to the Funds, to selected institutions (including banks,
trust companies, brokers and investment advisers) and other persons in
connection with the sale and/or servicing of Shares of the Funds and other
investment portfolios of the Trust (such as additional payments based on new
sales, amounts exceeding pre-established thresholds, or the length of time
clients' assets have remained in the Trust), and subject to applicable NASD
regulations, contribute to various non-cash and cash incentive arrangements to
promote the sale of Shares, as well as sponsor various educational programs,
sales contests and/or promotions in which participants may receive
reimbursement of expenses, entertainment and prizes such as travel awards,
merchandise, cash, investment research and educational information and related
support materials. This additional compensation may vary among institutions
depending upon such factors as the amounts their clients have invested (or may
invest) in particular portfolios of the Trust, the particular program involved,
or the amount of reimbursable expenses. Additional compensation based on sales
may, but is currently not expected to, exceed 0.50% (annualized) of the amount
invested. For further information, see the Additional Statement.
 
  The Funds reserve the right to redeem the Institutional Shares of any
shareholder of record whose account balance is less than $50 as a result of
earlier redemptions. Such redemptions will not be implemented if the value of a
recordholder's account falls below the minimum account balance solely as a
result of market conditions. The Trust will give 60 days' prior written notice
to recordholders whose Institutional Shares are being redeemed to allow them to
purchase sufficient additional Institutional Shares of a Fund to avoid such
redemption.
 
  The Funds and Goldman Sachs each reserve the right to reject any specific
purchase order (including exchanges) or to restrict purchases or exchanges by a
particular purchaser (or group of related purchasers). This may occur, for
example, when a purchaser or group of purchasers' pattern of frequent
purchases, sales or exchanges of Institutional Shares of a Fund is evident, or
if purchases, sales or exchanges are, or a subsequent abrupt redemption might
be, of a size that would disrupt management of a Fund.
 
  In the sole discretion of Goldman Sachs, a Fund may accept securities instead
of cash for the purchase of Shares of the Fund. Such purchases will be
permitted only if the Investment Adviser determines that any securities
acquired in this manner are consistent with the Fund's investment objectives,
restrictions and policies and are desirable investments for the Fund.
 
                                       43
<PAGE>
 
 
                               EXCHANGE PRIVILEGE
 
 
  Institutional Shares of the Fund may be exchanged for: (i) Institutional
Shares of any other mutual fund sponsored by Goldman Sachs and designated as an
eligible fund for this purpose; and (ii) the corresponding class of any Goldman
Sachs Money Market Fund at the NAV next determined either by writing to Goldman
Sachs, Attention: Goldman Sachs Domestic Equity Funds--Name of Fund and Class
of Shares, c/o GSAM Shareholder Services, 4900 Sears Tower, Chicago, Illinois
60606 or, if previously elected in the Fund's Account Information Form, by
telephone at 800-621-2550 (7:00 a.m. to 5:30 p.m. Chicago time). A shareholder
should obtain and read the prospectus relating to any other fund and its Shares
and consider its investment objective, policies and applicable fees before
making an exchange. Under the telephone exchange privilege, Institutional
Shares may be exchanged among accounts with different names, addresses and
social security or other taxpayer identification numbers only if the exchange
request is in writing and is received in accordance with the procedures set
forth under "Redemption of Institutional Shares."
 
  In an effort to prevent unauthorized or fraudulent exchanges by telephone,
Goldman Sachs employs reasonable procedures as set forth under "Redemption of
Institutional Shares" to confirm that such instructions are genuine. In times
of drastic economic or market changes the telephone exchange privilege may be
difficult to implement. For federal income tax purposes, an exchange is treated
as a sale of the Institutional Shares surrendered in the exchange on which an
investor may realize a gain or loss, followed by a purchase of Institutional
Shares, or the corresponding class of any Goldman Sachs Money Market Fund
received in the exchange. Shareholders should consult their own tax adviser
concerning the tax consequences of an exchange.
 
  Each exchange which represents an initial investment in a Fund must satisfy
the minimum investment requirements of the Fund into which the Institutional
Shares are being exchanged, except that this requirement may be waived at the
discretion of the officers of the Fund. Exchanges are available only in states
where exchanges may legally be made. The exchange privilege may be materially
modified or withdrawn at any time on 60 days' written notice to holders of
Institutional Shares and is subject to certain limitations. See "Purchase of
Institutional Shares."
 
 
                       REDEMPTION OF INSTITUTIONAL SHARES
 
 
  The Funds will redeem Institutional Shares upon request of a recordholder of
such Shares on any Business Day at the NAV next determined after receipt of a
request in proper form by Goldman Sachs from the recordholder. (See "Purchase
of Institutional Shares--Other Purchase Information" for a description of
limited situations where an institution or other intermediary may be authorized
to accept requests for the Funds.) If Institutional Shares to be redeemed were
recently purchased by check, a Fund may delay transmittal of redemption
proceeds until such time as it has assured itself that good funds have been
collected for the purchase of such Institutional Shares. This may take up to 15
days. Redemption requests may be made by a shareholder of record by writing to
or calling the Transfer Agent at the address or telephone number set forth on
the back cover of this Prospectus. A shareholder of record may request
redemptions by telephone if the optional telephone redemption privilege is
elected on the Account Information Form accompanying this Prospectus. It may be
difficult to implement redemptions by telephone in times of drastic economic or
market changes.
 
                                       44
<PAGE>
 
  In an effort to prevent unauthorized or fraudulent redemption or exchange
requests by telephone, Goldman Sachs employs reasonable procedures specified by
the Trust to confirm that such instructions are genuine. Among other things,
any redemption request that requires money to go to an account or address other
than that designated on the Account Information Form must be in writing and
signed by an authorized person designated on the Account Information Form. Any
such written request is also confirmed by telephone with both the requesting
party and the designated bank account to verify instructions. Exchanges among
accounts with different names, addresses and social security or other taxpayer
identification numbers must be in writing and signed by an authorized person
designated on the Account Information Form. Other procedures may be implemented
from time to time concerning telephone redemptions and exchanges. If reasonable
procedures are not implemented, the Trust may be liable for any loss due to
unauthorized or fraudulent transactions. In all other cases, neither the Funds,
the Trust nor Goldman Sachs will be responsible for the authenticity of
redemption or exchange instructions received by telephone.
 
  Written requests for redemptions must be signed by each recordholder whose
signature has been guaranteed by a bank, a securities broker or dealer, a
credit union having authority to issue signature guarantees, a savings and loan
association, a building and loan association, a cooperative bank, a federal
savings bank or association, a national securities exchange, a registered
securities association or a clearing agency, provided that such institution
satisfies the standards established by the Transfer Agent.
 
  The Funds will arrange for the proceeds of redemptions effected by any means
to be wired as federal funds to the bank account designated in the
recordholder's Account Information Form or, if the recordholder elects in
writing, by check. Redemption proceeds paid by wire transfer will normally be
wired on the next Business Day in federal funds (for a total one-day delay),
but may be paid up to three Business Days after receipt of a properly executed
redemption request. Wiring of redemption proceeds may be delayed one additional
Business Day if the Federal Reserve Bank is closed on the day redemption
proceeds would originally be wired. Redemption proceeds paid by check will
normally be mailed to the address of record within three Business Days of
receipt of a properly executed redemption request. In order to change the bank
designated on the Account Information Form to receive redemption proceeds, a
written request must be received by the Transfer Agent. This request must be
signature guaranteed as set forth above. Further documentation may be required
for executors, trustees or corporations. Once wire transfer instructions have
been given by Goldman Sachs, neither the Funds, the Trust nor Goldman Sachs
assumes any further responsibility for the performance of intermediaries or the
recordholder's bank in the transfer process. If a problem with such performance
arises, the recordholder should deal directly with such intermediaries or bank.
 
  Additional documentation regarding a redemption by any means may be required
to effect a redemption when deemed appropriate by Goldman Sachs. The request
for such redemption will not be considered to have been received in proper form
until such additional documentation has been received.
 
  Institutions (including banks, trust companies, brokers and investment
advisers) are responsible for the timely transmittal of redemption requests by
their customers to the Transfer Agent. In order to facilitate the timely
transmittal of redemption requests, these institutions have established times
by which redemption requests must be received by them. Additional documentation
may be required when deemed appropriate by an institution.
 
                              --------------------
 
                                       45
<PAGE>
 
 
                                  APPENDIX
 
 
 
   GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON ACCOUNT
                               INFORMATION FORM
 
  You are required by law to provide a Fund with your correct Taxpayer
Identification Number (TIN), regardless of whether you file tax returns.
Failure to do so may subject you to penalties. Failure to provide your correct
TIN and to sign your name in the Certification section of the Account
Information Form could result in withholding of 31% by a Fund for the federal
backup withholding tax on distributions, redemptions, exchanges and other
payments relating to your account.
 
  Any tax withheld may be credited against taxes owed on your federal income
tax return.
 
  If you do not have a TIN, you should apply for one immediately by contacting
your local office of the Social Security Administration or the Internal
Revenue Service (IRS). Backup withholding could also apply to payments
relating to your account prior to a Fund's receipt of your TIN.
 
  Special rules apply for certain entities. For example, for an account
established under a Uniform Gifts or Transfers to Minors Act, the TIN of the
minor should be furnished.
 
  If you have been notified by the IRS that you are subject to backup
withholding because you failed to report all your interest and/or dividend
income on your tax return and you have not been notified by the IRS that such
withholding should cease, you must cross out item (2) in the Certification
section of the Account Information Form.
 
  If you are an exempt recipient, you should furnish your TIN and certify your
exemption by signing the Certification section and writing "exempt" after your
signature. Exempt recipients include: corporations, tax-exempt pension plans
and IRAs, governmental agencies, financial institutions, registered securities
and commodities dealers and others.
 
  If you are a nonresident alien or foreign entity, you must provide a
completed Form W-8 to a Fund in order to avoid backup withholding on certain
payments. Other payments to you may be subject to nonresident alien
withholding of up to 30%.
 
  For further information regarding backup and nonresident alien withholding,
see Sections 3406, 1441 and 1442 of the Code and consult your tax adviser.
 
                                      A-1
<PAGE>
 
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS ASSET
MANAGEMENT
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN SACHS FUNDS
MANAGEMENT, L.P.
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR
85 BROAD STREET
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
TRANSFER AGENT
4900 SEARS TOWER
CHICAGO, ILLINOIS 60606
 
STATE STREET BANK AND TRUST COMPANY
CUSTODIAN
1776 HERITAGE DRIVE
NORTH QUINCY, MASSACHUSETTS 02171
 
ARTHUR ANDERSEN, LLP
INDEPENDENT PUBLIC ACCOUNTANTS
225 FRANKLIN STREET
BOSTON, MASSACHUSETTS 02110
 
TOLL FREE (IN U.S.) . . . . . . . . 800-621-2550
 
EQDOMPROINST
501417
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS DOMESTIC
EQUITY FUNDS
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
 
INSTITUTIONAL SHARES
 
 
 
LOGO
Goldman
Sachs
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
- --------------------------------------------------------------------------------
 
 
PROSPECTUS          GOLDMAN SACHS INTERNATIONAL EQUITY FUNDS
May 1, 1998, as revised  CLASS A, B AND C SHARES
September 1, 1998
                           
 
GOLDMAN SACHS CORE INTERNATIONAL EQUITY FUND
  Seeks long-term growth of capital through a broadly diversified portfolio of
  equity securities of large cap companies that are organized outside the U.S.
  or whose securities are principally traded outside the U.S.
 
GOLDMAN SACHS INTERNATIONAL EQUITY FUND
  Seeks long-term capital appreciation through investments in equity securi-
  ties of companies that are organized outside the U.S. or whose securities
  are principally traded outside the U.S.
 
GOLDMAN SACHS JAPANESE EQUITY FUND
  Seeks long-term capital appreciation through investments in equity securi-
  ties of Japanese companies.
 
GOLDMAN SACHS INTERNATIONAL SMALL CAP FUND
  Seeks long-term capital appreciation through investments in equity securi-
  ties of companies with public stock market capitalizations of $1 billion or
  less at the time of investment that are organized outside the U.S. or whose
  securities are principally traded outside the U.S.
 
GOLDMAN SACHS EMERGING MARKETS EQUITY FUND
  Seeks long-term capital appreciation through investments in equity securi-
  ties of emerging country issuers.
 
GOLDMAN SACHS ASIA GROWTH FUND
  Seeks long-term capital appreciation through investments in equity securi-
  ties of companies related (in the manner described herein) to Asian coun-
  tries.
 
  Goldman Sachs Asset Management ("GSAM"), New York, New York, a separate
operating division of Goldman, Sachs & Co. ("Goldman Sachs"), serves as
investment adviser to the CORE International Equity Fund. Goldman Sachs Asset
Management International ("GSAMI"), London, England, an affiliate of Goldman
Sachs, serves as investment adviser to each other Fund. GSAM and GSAMI are each
referred to in this Prospectus as the "Investment Adviser." Goldman Sachs
serves as each Fund's distributor and transfer agent.
 
  This Prospectus provides information about Goldman Sachs Trust (the "Trust")
and the Funds that a prospective investor should understand before investing.
This Prospectus should be retained for future reference. A Statement of
Additional Information (the "Additional Statement"), dated May 1, 1998, as
revised September 1, 1998, containing further information about the Trust and
the Funds which may be of interest to investors, has been filed with the
Securities and Exchange Commission ("SEC"), is incorporated herein by reference
in its entirety, and may be obtained without charge from Goldman Sachs by
calling the telephone number, or writing to one of the addresses, listed on the
back cover of this Prospectus. The SEC maintains a Web site
(http://www.sec.gov) that contains the Additional Statement and other
information regarding the Trust.
 
SHARES OF THE FUNDS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR
ENDORSED BY, ANY BANK OR OTHER INSURED DEPOSITORY INSTITUTION, AND ARE NOT
INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD
OR ANY OTHER GOVERNMENT AGENCY. AN INVESTMENT IN A FUND INVOLVES INVESTMENT
RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
 
                                                        (continued on next page)
<PAGE>
 
  A FUND'S INVESTMENTS IN SECURITIES OF FOREIGN ISSUERS AND FOREIGN CURRENCIES
ENTAIL CERTAIN RISKS NOT CUSTOMARILY ASSOCIATED WITH INVESTING IN SECURITIES
OF U.S. ISSUERS QUOTED IN U.S. DOLLARS, INCLUDING RISKS RELATING TO CHANGES IN
RELATIVE CURRENCY EXCHANGE RATES OR (AS IN THE CASE OF THE EXPECTED
INTRODUCTION OF THE EURO) THE CREATION OF NEW CURRENCIES. THE SECURITIES
MARKETS OF ASIAN, LATIN AMERICAN, EASTERN EUROPEAN, AFRICAN AND OTHER EMERGING
COUNTRIES IN WHICH THE CORE INTERNATIONAL EQUITY FUND CAN INVEST A PORTION OF
ITS ASSETS AND THE INTERNATIONAL SMALL CAP, INTERNATIONAL EQUITY, EMERGING
MARKETS EQUITY AND ASIA GROWTH FUNDS MAY INVEST WITHOUT LIMIT, ARE LESS
LIQUID, ARE ESPECIALLY SUBJECT TO GREATER PRICE VOLATILITY, HAVE SMALLER
MARKET CAPITALIZATIONS, HAVE LESS GOVERNMENT REGULATION AND ARE NOT SUBJECT TO
AS EXTENSIVE AND FREQUENT ACCOUNTING, FINANCIAL AND OTHER REPORTING
REQUIREMENTS AS THE SECURITIES MARKETS OF MORE DEVELOPED COUNTRIES. FURTHER,
INVESTMENT IN EQUITY SECURITIES OF ISSUERS LOCATED IN RUSSIA AND CERTAIN OTHER
EMERGING COUNTRIES INVOLVES RISK OF LOSS RESULTING FROM PROBLEMS IN SHARE
REGISTRATION AND CUSTODY, WHICH RISKS ARE NOT NORMALLY ASSOCIATED WITH
INVESTMENT IN MORE DEVELOPED COUNTRIES. FUNDS THAT INVEST IN FOREIGN
SECURITIES AND EMERGING MARKETS ARE INTENDED FOR INVESTORS WHO CAN ACCEPT THE
RISKS ASSOCIATED WITH THESE INVESTMENTS AND MAY NOT BE SUITABLE FOR ALL
INVESTORS. THE JAPANESE EQUITY AND ASIA GROWTH FUNDS WILL BE PARTICULARLY
SUBJECT TO EVENTS AFFECTING THE MARKETS IN WHICH THESE FUNDS CONCENTRATE THEIR
INVESTMENTS. SEE "DESCRIPTION OF SECURITIES" AND "RISK FACTORS."
 
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
Fund Highlights....................    3
Fees and Expenses..................    7
Financial Highlights...............   11
Investment Objectives and Policies.   15
Description of Securities..........   20
Investment Techniques..............   24
Risk Factors.......................   28
Investment Restrictions............   31
Portfolio Turnover.................   31
Management.........................   31
Expenses ..........................   37
Reports to Shareholders............   37
</TABLE>
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
How to Invest......................   38
Services Available to Shareholders.   44
Distribution and Service Plans.....   47
How to Sell Shares of the Funds....   48
Dividends..........................   49
Net Asset Value....................   50
Performance Information............   50
Shares of the Trust................   51
Taxation...........................   52
Additional Information.............   53
Appendix ..........................  A-1
Account Application
</TABLE>
<PAGE>
 
 
                                FUND HIGHLIGHTS
 
   The following is intended to highlight certain information and is
 qualified in its entirety by the more detailed information contained in
 this Prospectus.
 
  WHAT IS THE GOLDMAN SACHS TRUST?
 
   The Goldman Sachs Trust is an open-end management investment company
 that offers its shares ("Shares") in several investment funds (commonly
 known as mutual funds (the "Funds")). Each Fund pools the monies of
 investors by selling its Shares to the public and investing these monies
 in a portfolio of securities designed to achieve that Fund's stated
 investment objectives.
 
  WHAT ARE THE INVESTMENT OBJECTIVES AND POLICIES OF THE FUNDS?
 
   Each Fund has distinct investment objectives and policies. There can be
 no assurance that a Fund's objectives will be achieved. Each Fund is a
 "diversified open-end management company" as defined in the Investment
 Company Act of 1940, as amended (the "Act"). For a further description of
 each Fund's investment objectives and policies, see "Investment
 Objectives and Policies," "Description of Securities" and "Investment
 Techniques."
 
<TABLE>
<S>             <C>                    <C>                            <C>
 FUND NAME      INVESTMENT OBJECTIVES       INVESTMENT CRITERIA             BENCHMARK
- --------------  ---------------------  ------------------------------ ---------------------
 CORE           Long-term growth of    At least 90% of total assets   EAFE Index (unhedged)
 INTERNATIONAL  capital.               in equity securities of
 EQUITY FUND                           companies organized outside
                                       the United States or whose
                                       securities are principally
                                       traded outside the United
                                       States. The Fund seeks broad
                                       representation of large cap
                                       issuers across major countries
                                       and sectors of the
                                       international economy. The
                                       Fund's investments are
                                       selected using both a variety
                                       of quantitative techniques and
                                       fundamental research in
                                       seeking to maximize the Fund's
                                       expected return, while
                                       maintaining risk, style,
                                       capitalization and industry
                                       characteristics similar to the
                                       unhedged Morgan Stanley
                                       Capital International (MSCI)
                                       Europe, Australasia and Far
                                       East Index (the "EAFE Index").
                                       The Fund may employ certain
                                       currency management
                                       techniques.
- -------------------------------------------------------------------------------------------
 INTERNATIONAL  Long-term capital      Substantially all, and at      FT/S&P Actuaries
 EQUITY FUND    appreciation.          least 65%, of total assets in  Europe & Pacific
                                       equity securities of companies Index (unhedged)
                                       organized outside the United
                                       States or whose securities are
                                       principally traded outside the
                                       United States. The Fund may
                                       employ currency management
                                       techniques.
- -------------------------------------------------------------------------------------------
</TABLE>
 
                                       3
<PAGE>
 
<TABLE>
<S>             <C>                    <C>                            <C>
 FUND NAME      INVESTMENT OBJECTIVES       INVESTMENT CRITERIA             BENCHMARK
- --------------  ---------------------  ------------------------------ ---------------------
 JAPANESE       Long-term capital      Substantially all, and at      Tokyo Price Index
 EQUITY FUND    appreciation.          least 65%, of total assets in  ("TOPIX")
                                       equity securities of Japanese
                                       companies. The Fund may employ
                                       currency management
                                       techniques.
- -------------------------------------------------------------------------------------------
 INTERNATIONAL  Long-term capital      Substantially all, and at      Morgan Stanley
 SMALL CAP      appreciation.          least 65%, of total assets in  Capital International
 FUND                                  equity securities of companies EAFE Small Cap Index
                                       with public stock market
                                       capitalizations of $1 billion
                                       or less at the time of
                                       investment that are organized
                                       outside the United States or
                                       whose securities are
                                       principally traded outside the
                                       United States. The Fund may
                                       employ currency management
                                       techniques.
- -------------------------------------------------------------------------------------------
 EMERGING       Long-term capital      Substantially all, and at      Morgan Stanley
 MARKETS        appreciation.          least 65%, of total assets in  Capital International
 EQUITY FUND                           equity securities of emerging  Emerging Markets Free
                                       country issuers. The Fund may  Index
                                       employ certain currency
                                       management techniques.
- -------------------------------------------------------------------------------------------
 ASIA GROWTH    Long-term capital      Substantially all, and at      Morgan Stanley
 FUND           appreciation.          least 65%, of total assets in  Capital International
                                       equity securities of companies All Country Asia Free
                                       in China, Hong Kong, India,    ex-Japan Index
                                       Indonesia, Malaysia, Pakistan,
                                       the Philippines,
                                       Singapore, South Korea, Sri
                                       Lanka, Taiwan, Thailand and
                                       other Asian countries. The
                                       Fund may employ certain
                                       currency management
                                       techniques.
</TABLE>
 
  WHAT ARE THE RISK FACTORS AND SPECIAL CHARACTERISTICS THAT I SHOULD
 CONSIDER BEFORE INVESTING?
 
   Each Fund's Share price will fluctuate with market, economic and, to
 the extent applicable, foreign exchange conditions, so that an investment
 in any of the Funds may be worth more or less when redeemed than when
 purchased. None of the Funds should be relied upon as a complete
 investment program. There can be no assurance that a Fund's investment
 objectives will be achieved. See "Risk Factors."
 
   Risks of Investing in Small Capitalization Companies. To the extent
 that a Fund invests in the securities of small market capitalization
 companies, the Fund may be exposed to a higher degree of risk and price
 volatility. Securities of such issuers may lack sufficient market
 liquidity to enable a Fund to effect sales at an advantageous time or
 without a substantial drop in price.
 
   Foreign Risks. Investments in securities of foreign issuers and
 currencies involve risks that are different from those associated with
 investments in domestic securities. The risks associated with foreign
 investments and currencies include changes in relative currency exchange
 rates (or, as in the case of the expected introduction of the euro next
 year, the creation of new currencies), political and economic
 developments, the imposition of exchange controls, confiscation and other
 governmental restrictions. Generally, there is less availability of data
 on foreign companies and securities markets as well as less regulation of
 foreign stock exchanges, brokers and issuers. A Fund's investments in
 emerging markets and countries ("Emerging Countries") involves greater
 risks than investments in the developed countries of Western Europe, the
 United States, Canada, Australia, New Zealand and Japan. In addition,
 because the Funds invest primarily outside the United States, they may
 involve greater risks, since the securities markets of foreign countries
 are
 
                                       4
<PAGE>
 
generally less liquid and subject to greater price volatility. The securities
markets of Emerging Countries, including those in Asia, Latin America, Eastern
Europe and Africa are marked by a high concentration of market capitalization
and trading volume in a small number of issuers representing a limited number
of industries, as well as a high concentration of ownership of such securities
by a limited number of investors.
 
  Risks of Investing in Japanese Markets. The Japanese Equity Fund will
concentrate in Japanese securities and therefore, will be particularly subject
to the risk of adverse social, political and economic events which occur in
Japan or affect the Japanese markets.
 
  Other. A Fund's use of certain investment techniques, including derivatives,
forward contracts, options and futures, will subject the Fund to greater risk
than funds that do not employ such techniques.
 
 WHO MANAGES THE FUNDS?
 
  Goldman Sachs Asset Management serves as Investment Adviser to the CORE
International Equity Fund. Goldman Sachs Asset Management International serves
as Investment Adviser to each other Fund. As of July 24, 1998, the Investment
Advisers, together with their affiliates, acted as investment adviser or
distributor for assets in excess of $168 billion.
 
 WHO DISTRIBUTES THE FUNDS' SHARES?
 
  Goldman Sachs acts as distributor of each Fund's Shares (the "Distributor").
 
 WHAT IS THE MINIMUM INVESTMENT?
 
 
<TABLE>
<CAPTION>
                                                                 MINIMUM
                                                           --------------------
                                                           INITIAL
                                                           PURCHASE ADDITIONAL
TYPE OF PURCHASE                                            AMOUNT  INVESTMENTS
- ----------------                                           -------- -----------
<S>                                                        <C>      <C>
Regular Purchases.........................................  $1,000      $50
Tax-Sheltered Retirement Plans (excluding SIMPLE IRAs and
 Education IRAs) and UGMA/UTMA Purchases..................  $  250      $50
SIMPLE IRAs and Education IRAs............................  $   50      $50
Automatic Investment Plan.................................  $   50      $50
403(b) Plans..............................................  $  200      $50
</TABLE>
 
  For further information, see "How to Invest--How to Buy Shares of the Funds"
on page 39.
 
 HOW DO I PURCHASE SHARES?
 
 
  You may purchase Shares of the Funds through Goldman Sachs and certain
investment dealers, including members of the National Association of Securities
Dealers, Inc. (the "NASD") and certain other financial service firms that have
agreements with Goldman Sachs relating to the sale of Shares ("Authorized
Dealers"). See "How to Invest" on page 38.
 
 WHAT ARE MY PURCHASE ALTERNATIVES?
 
 
  The Funds offer three classes of Shares through this Prospectus. These Shares
may be purchased, at the investor's choice, at a price equal to their next
determined net asset value ("NAV") (i) plus an initial sales charge imposed at
the time of purchase ("Class A Shares"); (ii) with a contingent deferred sales
charge (CDSC) imposed on redemptions within six years of purchase ("Class B
Shares"); or (iii) without any initial sales charge or CDSC, as long as Shares
are held for one year or more ("Class C Shares"). Direct purchases of $1
million or more of Class A Shares will be sold without an initial sales charge
and may be subject to a CDSC at the time of certain redemptions.
 
                                       5
<PAGE>
 
 
<TABLE>
<CAPTION>
                            MAXIMUM INITIAL                   MAXIMUM CONTINGENT
   ALL FUNDS                 SALES CHARGE                   DEFERRED SALES CHARGE
   ---------                ---------------                 ---------------------
   <S>                      <C>             <C>
   Class A.................      5.5%                            (See above)
   Class B.................       N/A                 5% declining to 0% after six years
   Class C.................       N/A       1% if Shares are redeemed within 12 months of purchase
</TABLE>
 
  Over time, the CDSC and distribution and service fees attributable to Class B
or Class C Shares will exceed the initial sales charge and the distribution and
service fees attributable to Class A Shares. Class B Shares convert to Class A
Shares, which are subject to lower distribution and service fees, eight years
after initial purchase. Class C Shares, which are subject to the same
distribution and service fees as Class B Shares, do not convert to Class A
Shares and are subject to the higher distribution and service fees
indefinitely. See "How to Invest--Alternative Purchase Arrangements" on page
38.
 
 HOW DO I SELL MY SHARES?
 
 
  You may redeem Shares upon request on any Business Day, as defined under
"Additional Information," at the NAV next determined after receipt of such
request in proper form, subject to any applicable CDSC. See "How to Sell Shares
of the Funds."
 HOW DO I RECEIVE DIVIDENDS AND DISTRIBUTIONS?
 
 
<TABLE>
<CAPTION>
 INVESTMENT INCOME DIVIDENDS                                     CAPITAL GAINS
      DECLARED AND PAID                                          DISTRIBUTIONS
 ---------------------------                                     -------------
<S>                                                              <C>
          Annually                                                 Annually
</TABLE>
 
  You may receive dividends and distributions in additional Shares of the same
Class of the Fund in which you have invested or you may elect to receive them
in cash, Shares of the same Class of other mutual funds sponsored by Goldman
Sachs (the "Goldman Sachs Funds") or ILA Service Units of the Prime Obligations
Portfolio or the Tax-Exempt Diversified Portfolio, if you hold Class A Shares
of a Fund, or ILA Class B or Class C Units of the Prime Obligations Portfolio,
if you hold Class B or Class C Shares of a Fund (the "ILA Portfolios"). For
further information concerning dividends and distributions, see "Dividends."
 
                                       6
<PAGE>
 
 
                               FEES AND EXPENSES
 
<TABLE>
<CAPTION>
                                   CORE                             INT'L                          JAPANESE
                                   INT'L                           EQUITY                           EQUITY
                                EQUITY FUND                         FUND                             FUND
                          -----------------------------    -----------------------------    -----------------------------
                          CLASS A    CLASS B    CLASS C    CLASS A    CLASS B    CLASS C    CLASS A    CLASS B    CLASS C
                          -------    -------    -------    -------    -------    -------    -------    -------    -------
<S>                       <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
SHAREHOLDER TRANSACTION EXPENSES:
 Maximum Sales Charge
  Imposed on Purchases...   5.5%/1/   none       none        5.5%/1/   none       none        5.5%/1/   none       none
 Maximum Sales Charge
  Imposed on Reinvested
  Dividends..............  none       none       none       none       none       none       none       none       none
 Maximum Deferred Sales
  Charge.................  none/1/     5.0%/2/    1.0%/3/   none/1/     5.0%/2/    1.0%/3/   none/1/     5.0%/2/    1.0%/3/
 Redemption Fees/4/......  none       none       none       none       none       none       none       none       none
 Exchange Fees/4/........  none       none       none       none       none       none       none       none       none
ANNUAL FUND OPERATING EXPENSES: (as a percentage of
 average daily net assets)/5/
 Management Fees.........  0.85%      0.85%      0.85%      1.00%      1.00%      1.00%      1.00%      1.00%      1.00%
 Distribution and Service
  Fees...................  0.50%      1.00%      1.00%      0.50%      1.00%      1.00%      0.50%      1.00%      1.00%
 Other Expenses (after
  applicable
  limitations)/6/........  0.31%      0.31%      0.31%      0.29%      0.29%      0.29%      0.20%      0.20%      0.20%
                           ----       ----       ----       ----       ----       ----       ----       ----       ----
TOTAL FUND OPERATING
 EXPENSES (AFTER EXPENSE
 LIMITATIONS)/7/.........  1.66%      2.16%      2.16%      1.79%      2.29%      2.29%      1.70%      2.20%      2.20%
                           ====       ====       ====       ====       ====       ====       ====       ====       ====
<CAPTION>
                                   INT'L                          EMERGING                           ASIA
                                 SMALL CAP                         MARKETS                          GROWTH
                                   FUND                          EQUITY FUND                         FUND
                          -----------------------------    -----------------------------    -----------------------------
                          CLASS A    CLASS B    CLASS C    CLASS A    CLASS B    CLASS C    CLASS A    CLASS B    CLASS C
                          -------    -------    -------    -------    -------    -------    -------    -------    -------
<S>                       <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
SHAREHOLDER TRANSACTION
 EXPENSES:
 Maximum Sales Charge
  Imposed on Purchases...   5.5%/1/   none       none        5.5%/1/   none       none        5.5%/1/   none       none
 Maximum Sales Charge
  Imposed on Reinvested
  Dividends..............  none       none       none       none       none       none       none       none       none
 Maximum Deferred Sales
  Charge.................  none/1/     5.0%/2/    1.0%/3/   none/1/     5.0%/2/    1.0%/3/   none/1/     5.0%/2/    1.0%/3/
 Redemption Fees/4/......  none       none       none       none       none       none       none       none       none
 Exchange Fees/4/........  none       none       none       none       none       none       none       none       none
ANNUAL FUND OPERATING EXPENSES: (as a percentage of
 average net assets)/5/
 Management Fees.........  1.20%      1.20%      1.20%      1.20%      1.20%      1.20%      1.00%      1.00%      1.00%
 Distribution and Service
  Fees...................  0.50%      1.00%      1.00%      0.50%      1.00%      1.00%      0.50%      1.00%      1.00%
 Other Expenses (after
  applicable
  limitations)/6/........  0.35%      0.35%      0.35%      0.34%      0.34%      0.34%      0.35%      0.35%      0.35%
                           ----       ----       ----       ----       ----       ----       ----       ----       ----
TOTAL FUND OPERATING
 EXPENSES (AFTER EXPENSE
 LIMITATIONS)/7/.........  2.05%      2.55%      2.55%      2.04%      2.54%      2.54%      1.85%      2.35%      2.35%
                           ====       ====       ====       ====       ====       ====       ====       ====       ====
</TABLE>
 
                                       7
<PAGE>
 
- --------
/1/ As a percentage of the offering price. No sales charge is imposed on
    purchases of Class A Shares by certain classes of investors. A CDSC of
    1.00% is imposed on certain redemptions (within 18 months of purchase) of
    Class A Shares sold without an initial sales charge as part of an
    investment of $1 million or more. See "How to Invest--Offering Price--
    Class A Shares."
/2/ A CDSC is imposed upon Shares redeemed within six years of purchase at a
    rate of 5% in the first year, declining to 1% in the sixth year, and
    eliminated thereafter. See "How to Invest--Offering Price--Class B
    Shares."
/3/ A CDSC of 1.00% is imposed on Shares redeemed within 12 months of
    purchase. See "How to Invest--Offering Price--Class C Shares."
/4/ A transaction fee of $7.50 may be charged for redemption proceeds paid by
    wire. In addition to free reinvestments of dividends and distributions in
    shares of other Goldman Sachs Funds or units of the ILA Portfolios and
    free automatic exchanges pursuant to the Automatic Exchange Program, six
    free exchanges are permitted in each twelve month period. A fee of $12.50
    may be charged for each subsequent exchange during such period. See "How
    to Invest--Exchange Privilege."
/5/ The Funds' annual operating expenses have been restated to reflect fees
    and expenses in effect as of September 1, 1998.
/6/ The Investment Adviser has voluntarily agreed to reduce or limit certain
    other expenses (excluding management, distribution and service fees,
    transfer agency fees (equal to 0.19% of the average daily net assets of
    each Fund's Class A, B and C Shares), taxes, interest and brokerage fees
    and litigation, indemnification and other extraordinary expenses) for each
    Fund to the extent such expenses exceed the following percentages of
    average daily net assets:
 
<TABLE>
<CAPTION>
                                                                         OTHER
                                                                        EXPENSES
                                                                        --------
      <S>                                                               <C>
      CORE International Equity........................................  0.12%
      International Equity.............................................  0.10%
      Japanese Equity..................................................  0.01%
      International Small Cap..........................................  0.16%
      Emerging Markets Equity..........................................  0.15%
      Asia Growth......................................................  0.16%
</TABLE>
 
/7/ Without the limitations described above, "Other Expenses" and "Total
    Operating Expenses" of the Funds would be as set forth below:
 
<TABLE>
<CAPTION>
                                                                        TOTAL
                                                              OTHER   OPERATING
                                                             EXPENSES EXPENSES
                                                             -------- ---------
      <S>                                                    <C>      <C>
      CORE International Equity
        Class A.............................................  0.59%     1.94%
        Class B.............................................  0.59%     2.44%
        Class C.............................................  0.59%     2.44%
      International Equity
        Class A.............................................  0.37%     1.87%
        Class B.............................................  0.37%     2.37%
        Class C.............................................  0.37%     2.37%
      Japanese Equity
        Class A.............................................  2.22%     3.72%
        Class B.............................................  2.22%     4.22%
        Class C.............................................  2.22%     4.22%
</TABLE>
 
                                       8
<PAGE>
 
<TABLE>
<CAPTION>
                                                                         TOTAL
                                                               OTHER   OPERATING
                                                              EXPENSES EXPENSES
                                                              -------- ---------
      <S>                                                     <C>      <C>
      International Small Cap
        Class A..............................................  3.50%     5.20%
        Class B..............................................  3.50%     5.70%
        Class C..............................................  3.50%     5.70%
      Emerging Markets Equity
        Class A..............................................  0.65%     2.35%
        Class B..............................................  0.65%     2.85%
        Class C..............................................  0.65%     2.85%
      Asia Growth
        Class A..............................................  0.50%     2.00%
        Class B..............................................  0.50%     2.50%
        Class C..............................................  0.50%     2.50%
</TABLE>
 
EXAMPLE
 
  You would pay the following expenses on a hypothetical $1,000 investment
(including the maximum sales charge) assuming (i) a 5% annual return; and (ii)
redemption at the end of each time period.
 
<TABLE>
<CAPTION>
    FUND                                         1 YEAR 3 YEARS 5 YEARS 10 YEARS
    ----                                         ------ ------- ------- --------
<S>                                              <C>    <C>     <C>     <C>
CORE International Equity
 Class A Shares................................   $71    $104    $140     $241
 Class B Shares
 --Assuming complete redemption at end of
  period.......................................    69      96     135      237
 --Assuming no redemption......................    22      68     116      237
 Class C Shares
 --Assuming complete redemption at end of
  period.......................................    31      68     116      249
 --Assuming no redemption......................    22      68     116      249
International Equity
 Class A Shares................................    72     108     147      254
 Class B Shares
 --Assuming complete redemption at end of
  period.......................................    70     100     142      250
 --Assuming no redemption......................    23      72     123      250
 Class C Shares
 --Assuming complete redemption at end of
  period.......................................    32      72     123      263
 --Assuming no redemption......................    23      72     123      263
Japanese Equity
 Class A Shares................................    71     106     N/A      N/A
 Class B Shares
 --Assuming complete redemption at end of
  period.......................................    69      97     N/A      N/A
 --Assuming no redemption......................    22      69     N/A      N/A
 Class C Shares
 --Assuming complete redemption at end of
  period.......................................    31      69     N/A      N/A
 --Assuming no redemption......................    22      69     N/A      N/A
International Small Cap
 Class A Shares................................    75     116     N/A      N/A
 Class B Shares
 --Assuming complete redemption at end of
  period.......................................    73     107     N/A      N/A
 --Assuming no redemption......................    26      79     N/A      N/A
 Class C Shares
 --Assuming complete redemption at end of
  period.......................................    35      79     N/A      N/A
 --Assuming no redemption......................    26      79     N/A      N/A
</TABLE>
 
                                       9
<PAGE>
 
<TABLE>
<CAPTION>
    FUND                                         1 YEAR 3 YEARS 5 YEARS 10 YEARS
    ----                                         ------ ------- ------- --------
<S>                                              <C>    <C>     <C>     <C>
Emerging Markets Equity
 Class A Shares................................   $75    $115     N/A      N/A
 Class B Shares
 --Assuming complete redemption at end of
  period.......................................    73     107     N/A      N/A
 --Assuming no redemption......................    26      79     N/A      N/A
 Class C Shares
 --Assuming complete redemption at end of
  period.......................................    35      79     N/A      N/A
 --Assuming no redemption......................    26      79     N/A      N/A
Asia Growth
 Class A Shares................................    73     110    $150     $260
 Class B Shares
 --Assuming complete redemption at end of
  period.......................................    71     101     145      256
 --Assuming no redemption......................    24      73     126      256
 Class C Shares
 --Assuming complete redemption at end of
  period.......................................    33      73     126      269
 --Assuming no redemption......................    24      73     126      269
</TABLE>
 
  The hypothetical example assumes that a CDSC will not apply to redemptions
of Class A Shares within the first 18 months. Class B Shares convert to Class
A Shares eight years after purchase; therefore, Class A expenses are used in
the hypothetical example after year eight.
 
  The Investment Adviser and Goldman Sachs may modify or discontinue any of
the limitations set forth above in the future at their discretion. The
information set forth in the foregoing table and hypothetical example relates
only to Class A, B and C Shares. Each Fund also offers Institutional and
Service Shares, which are subject to different fees and expenses (which affect
performance), have different minimum investment requirements and are entitled
to different services than Class A, Class B and Class C Shares. Information
regarding Institutional and Service Shares may be obtained from your sales
representative or from Goldman Sachs by calling the number on the back cover
page of this Prospectus. Because of the Distribution and Service Plans, long-
term shareholders may pay more than the economic equivalent of the maximum
front-end sales charges permitted by the NASD's rules regarding investment
companies.
 
  In addition to the compensation itemized above, certain institutions that
sell Fund Shares and/or their salespersons may receive other compensation in
connection with the sale and distribution of Class A, Class B and Class C
Shares of the Funds or for services to their customers' accounts and/or the
Funds. For additional information regarding such compensation, see
"Management" and "Services Available to Shareholders" in this Prospectus and
"Other Information Regarding Purchases, Redemptions, Exchanges and Dividends"
in the Additional Statement.
 
  The purpose of the foregoing table is to assist investors in understanding
the various fees and expenses of a Fund that an investor will bear directly or
indirectly. The information on the fees and expenses included in the table and
hypothetical example above are based on each Fund's fees and expenses (actual
or estimated) and should not be considered as representative of past or future
expenses. Actual fees and expenses may be greater or less than those
indicated. Moreover, while the example assumes a 5% annual return, a Fund's
actual performance will vary and may result in an actual return greater or
less than 5%. See "Management--Investment Advisers."
 
                                      10
<PAGE>
 
 
                             FINANCIAL HIGHLIGHTS
 
         SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD
 
  The following data have been audited by Arthur Andersen LLP, independent
public accountants, as indicated in their report incorporated by reference
into the Additional Statement from the Annual Report to shareholders of the
Funds for the year ended January 31, 1998 (the "Annual Report"). This
information should be read in conjunction with the financial statements and
related notes incorporated by reference and attached to the Additional
Statement. The Annual Report also contains performance information and is
available upon request and without charge by calling the telephone number or
writing to one of the addresses on the back cover of this Prospectus. During
the periods shown, the Trust did not offer Class A, Class B or Class C Shares
of the Japanese Equity or International Small Cap Funds. Accordingly, there
are no financial highlights for these Funds.
 
<TABLE>
<CAPTION>
                                      INCOME (LOSS) FROM               DISTRIBUTIONS TO
                                   INVESTMENT OPERATIONS(E)              SHAREHOLDERS
                           ---------------------------------------- -----------------------
                                                                                 FROM NET
                                       NET REALIZED   NET REALIZED               REALIZED
                                      AND UNREALIZED AND UNREALIZED              GAIN ON
                 NET ASSET            GAIN (LOSS) ON GAIN (LOSS) ON    FROM     INVESTMENT      NET     NET ASSET
                  VALUE,      NET      INVESTMENTS      CURRENCY       NET         AND       DECREASE    VALUE,
                 BEGINNING INVESTMENT  AND FUTURES      RELATED     INVESTMENT   FUTURES      IN NET     END OF     TOTAL
                 OF PERIOD   INCOME    TRANSACTIONS   TRANSACTIONS    INCOME   TRANSACTIONS ASSET VALUE  PERIOD   RETURN(A)
                 --------- ---------- -------------- -------------- ---------- ------------ ----------- --------- ---------
                                                                                           CORE INTERNATIONAL EQUITY FUND
- ------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>            <C>        <C>          <C>         <C>       <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......  $10.00     $   --       $0.13          $(0.91)      $   --       --         $(0.78)     $9.22     (7.66)%(d)
1998--Class B
Shares(b).......   10.00      (0.02)       0.13           (0.90)          --       --          (0.79)      9.21     (7.90)(d)
1998--Class C
Shares(b).......   10.00      (0.02)       0.13           (0.89)          --       --          (0.78)      9.22     (7.80)(d)
1998--Institu-
tional
Shares(b).......   10.00       0.02        0.13           (0.89)      (0.02)       --          (0.76)      9.24     (7.45)(d)
1998--Service
Shares(b).......   10.00       0.01        0.13           (0.91)          --       --          (0.77)      9.23     (7.70)(d)
<CAPTION>
                                                                                RATIOS ASSUMING
                                                                              NO VOLUNTARY WAIVER
                                                                                   OF FEES OR
                                                                              EXPENSE LIMITATIONS
                                                                            --------------------------
                                                               RATIO OF                   RATIO OF
                                         NET      RATIO OF        NET                        NET
                                      ASSETS AT      NET      INVESTMENT     RATIO OF    INVESTMENT
                 PORTFOLIO  AVERAGE     END OF   EXPENSES TO   INCOME TO     EXPENSES   INCOME (LOSS)
                 TURNOVER  COMMISSION   PERIOD   AVERAGE NET  AVERAGE NET   TO AVERAGE   TO AVERAGE
                   RATE       RATE    IN (000'S)   ASSETS       ASSETS      NET ASSETS   NET ASSETS
                 --------- ---------- ---------- ------------ ------------- ----------- --------------
- ------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>        <C>          <C>           <C>         <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......   25.16%    $.0069    $ 7,087      1.50%(c)     (0.27)%(c)    4.87%(c)     (3.90)%(c)
1998--Class B
Shares(b).......   25.16      .0069      2,721      2.00(c)      (0.72)(c)     5.12(c)      (3.84)(c)
1998--Class C
Shares(b).......   25.16      .0069      1,608      2.00(c)      (0.73)(c)     5.12(c)      (3.85)(c)
1998--Institu-
tional
Shares(b).......   25.16      .0069     17,719      1.00(c)       0.59(c)      4.12(c)      (2.53)(c)
1998--Service
Shares(b).......   25.16      .0069          1      1.50(c)       0.26(c)      4.62(c)      (2.86)(c)
</TABLE>
- ----
(a) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions, a complete redemption of
    the investment at the net asset value at the end of the period and no
    sales or redemption charges. Total return would be reduced if a sales or
    redemption charge were taken into account.
(b) Commenced operations on August 15, 1997.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per share amounts.
 
                                       11
<PAGE>
 
 
<TABLE>
<CAPTION>
                                         INCOME  FROM                              DISTRIBUTIONS TO
                                   INVESTMENT OPERATIONS(E)                          SHAREHOLDERS
                           ---------------------------------------- -----------------------------------------------
                                                                                            FROM NET   IN EXCESS OF
                                                          NET                               REALIZED   NET REALIZED
                                                        REALIZED                            GAIN ON      GAIN ON
                                           NET       AND UNREALIZED                        INVESTMENT   INVESTMENT      NET
                 NET ASSET    NET        REALIZED     GAIN (LOSS)              IN EXCESS  AND FOREIGN  AND FOREIGN   INCREASE
                  VALUE,   INVESTMENT AND UNREALIZED  ON CURRENCY    FROM NET    OF NET     CURRENCY     CURRENCY   (DECREASE)
                 BEGINNING   INCOME   GAIN (LOSS) ON    RELATED     INVESTMENT INVESTMENT   RELATED      RELATED      IN NET
                 OF PERIOD   (LOSS)    INVESTMENTS    TRANSACTIONS    INCOME     INCOME   TRANSACTIONS TRANSACTIONS ASSET VALUE
                 --------- ---------- -------------- -------------- ---------- ---------- ------------ ------------ -----------
                                                                                          INTERNATIONAL EQUITY FUND
- -------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>            <C>        <C>        <C>          <C>          <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $19.32     $0.03        $2.99          $(0.95)       $--       $(0.30)     $(0.88)      $(0.36)      $0.53
1998--Class B
Shares..........   19.24     (0.08)        2.96           (0.94)        --        (0.25)      (0.47)       (0.76)       0.46
1998--Class C
Shares(b).......   22.60     (0.04)       (2.03)           0.65         --        (0.38)        --         (1.24)      (3.04)
1998--
Institutional
Shares..........   19.40      0.10         3.09           (0.98)      (0.07)      (0.33)      (0.97)       (0.27)       0.57
1998--Service
Shares..........   19.34      0.02         3.02           (0.96)        --        (0.35)      (0.18)       (1.05)       0.50
- -------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   17.20      0.10         3.51           (1.28)        --          --        (0.21)         --         2.12
1997--Class B
Shares(b).......   18.91     (0.06)        0.94           (0.34)        --          --        (0.21)         --         0.33
1997--
Institutional
Shares(b).......   17.45      0.04         3.39           (1.24)      (0.03)        --        (0.21)         --         1.95
1997--Service
Shares(b).......   17.70     (0.02)        2.95           (1.08)        --          --        (0.21)         --         1.64
- -------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   14.52      0.13         2.58            1.42       (0.58)        --        (0.87)         --         2.68
- -------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   18.10      0.06        (3.04)          (0.01)        --          --        (0.59)         --        (3.58)
- -------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   14.35      0.05         4.08           (0.38)        --          --          --           --         3.75
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1993--Class A
Shares(b).......   14.18     (0.01)        0.29           (0.11)        --          --          --           --         0.17
<CAPTION>
                                                                                                    RATIOS ASSUMING
                                                                                                  NO VOLUNTARY WAIVER
                                                                                                       OF FEES OR
                                                                                                  EXPENSE LIMITATIONS
                                                                                                ------------------------
                                                                                    RATIO OF
                                                                                      NET
                                                                                   INVESTMENT                  RATIO
                                                                NET       RATIO      INCOME                   OF NET
                 NET ASSET                                   ASSETS AT   OF NET    (LOSS) TO     RATIO OF   INVESTMENT
                  VALUE,                PORTFOLIO  AVERAGE    END OF   EXPENSES TO  AVERAGE      EXPENSES  INCOME (LOSS)
                  END OF     TOTAL      TURNOVER  COMMISSION  PERIOD     AVERAGE      NET       TO AVERAGE  TO AVERAGE
                  PERIOD   RETURN(A)      RATE     RATE(F)   IN (000S) NET ASSETS    ASSETS     NET ASSETS  NET ASSETS
                 --------- ------------ --------- ---------- --------- ----------- ------------ ---------- -------------
- -------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>          <C>       <C>        <C>       <C>         <C>          <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $19.85     11.12%       40.82%    $.0207   $697.590     1.67%      (.027)%       1.80%       (0.40)%
1998--Class B
Shares..........   19.70     10.51        40.82      .0207     55,324     2.20       (0.90)        2.30        (1.00)
1998--Class C
Shares(b).......   19.56     (5.92)(d)    40.82      .0207      3,369     2.27(c)    (1.43)(c)     2.37(c)     (1.53)(c)
1998--
Institutional
Shares..........   19.97     11.82        40.82      .0207     56,263     1.08        0.30         1.18         0.20
1998--Service
Shares..........   19.84     11.25        40.82      .0207      3,035     1.55       (0.36)        1.65        (0.46)
- -------------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   19.32     13.48        38.01      .0318    536,283     1.69       (0.07)        1.88        (0.26)
1997--Class B
Shares(b).......   19.24      2.83 (d)    38.01      .0318     19,198     2.23(c)    (0.97)(c)     2.38(c)     (1.12)(c)
1997--
Institutional
Shares(b).......   19.40     12.53 (d)    38.01      .0318     68,374     1.10(c)     0.43 (c)     1.25(c)      0.28 (c)
1997--Service
Shares(b).......   19.34     10.42 (d)    38.01      .0318        674     1.60(c)    (0.40)(c)     1.75(c)     (0.55)(c)
- -------------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   17.20     28.68        68.48        --     330,860     1.52        0.26         1.77         0.01
- -------------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   14.52    (16.65)       84.54        --     275,086     1.73        0.40         1.98         0.15
- -------------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   18.10     26.13        60.04        --     269,091     1.76        0.51         2.01         0.26
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1993--Class A
Shares(b).......   14.35      1.23 (d)     0.00        --      66,063     1.80(c)    (0.42)(c)     2.58(c)     (1.20)(c)
</TABLE>
- -----------
 
(a) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions, a complete redemption of
    the investment at the net asset value at the end of the period and no
    sales or redemption charges. Total return would be reduced if a sales or
    redemption charge were taken into account.
(b) Class A, Class B, Class C, Institutional and Service share activity
    commenced on December 1, 1992, May 1, 1996, August 15, 1997, February 7,
    1996 and March 6, 1996, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
                                       12
<PAGE>
 
 
<TABLE>
<CAPTION>
                                          INCOME FROM
                                    INVESTMENT OPERATIONS(E)             DISTRIBUTIONS TO SHAREHOLDERS
                           ------------------------------------------ -----------------------------------
                                                       NET REALIZED                FROM NET
                 NET ASSET             NET REALIZED   AND UNREALIZED             REALIZED GAIN IN EXCESS
                  VALUE,      NET     AND UNREALIZED LOSS ON FOREIGN   FROM NET  ON INVESTMENT   OF NET   NET DECREASE NET ASSET
                 BEGINNING INVESTMENT GAIN (LOSS) ON CURRENCY RELATED INVESTMENT  AND OPTIONS  INVESTMENT    IN NET    VALUE, END
                 OF PERIOD   INCOME    INVESTMENTS     TRANSACTIONS     INCOME   TRANSACTIONS    INCOME   ASSET VALUE  OF PERIOD
                 --------- ---------- -------------- ---------------- ---------- ------------- ---------- ------------ ----------
                                                                                                EMERGING MARKETS EQUITY FUND
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>              <C>        <C>           <C>        <C>          <C>
FOR THE PERIOD ENDED JANUARY 31, 1998
- -------------------------------------
1998--Class A
Shares(b).......  $10.00      $--         $(0.11)         $(0.20)        --           --          --         $(0.31)     $9.69
1998--Class B
Shares(b).......   10.00       --          (0.11)          (0.20)        --           --          --          (0.31)      9.69
1998--Class C
Shares(b).......   10.00       --          (0.10)          (0.20)        --           --          --          (0.30)      9.70
1998--Institu-
tional
Shares(b).......   10.00      0.01         (0.11)          (0.20)        --           --          --          (0.30)      9.70
1998--Service
Shares(b).......   10.00       --          (0.11)          (0.20)        --           --          --          (0.31)      9.69
<CAPTION>
                                                                                              RATIOS ASSUMING
                                                                                            NO VOLUNTARY WAIVER
                                                                                                 OF FEES OR
                                                                                            EXPENSE LIMITATIONS
                                                                                          ---------------------------
                                                                              RATIO OF                 RATIO OF NET
                                                   NET ASSETS   RATIO OF   NET INVESTMENT  RATIO OF     INVESTMENT
                              PORTFOLIO  AVERAGE   AT END OF  NET EXPENSES INCOME (LOSS)  EXPENSES TO    LOSS TO
                   TOTAL      TURNOVER  COMMISSION   PERIOD    TO AVERAGE    TO AVERAGE   AVERAGE NET    AVERAGE
                 RETURN(A)      RATE       RATE    (IN 000S)   NET ASSETS    NET ASSETS     ASSETS      NET ASSETS
                 ------------ --------- ---------- ---------- ------------ -------------- ------------ --------------
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>          <C>       <C>        <C>        <C>          <C>            <C>          <C>
FOR THE PERIOD ENDED JANUARY 31, 1998
- -------------------------------------
1998--Class A
Shares(b).......   (3.10)%(d)   3.35%    $0.0005    $17,681       1.90%(c)      0.55%(c)     5.88%(c)     (3,43)%(c)
1998--Class B
Shares(b).......   (3.10)(d)    3.35      0.0005         64       2.41(c)       0.05(c)      6.39(c)      (3.93)(c)
1998--Class C
Shares(b).......   (3.00)(d)    3.35      0.0005         73       2.48(c)      (0.27)(c)     6.46(c)      (4.25)(c)
1998--Institu-
tional
Shares(b).......   (3.00)(d)    3.35      0.0005     19,120       1.30(c)       0.80(c)      5.28c)       (3.18)(c)
1998--Service
Shares(b).......   (3.10)(d)    3.35      0.0005          2       2.72(c)      (0.05)(c)     6.70(c)      (4.03)(c)
</TABLE>
- ----
(a) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions, a complete redemption of
    the investment at the net asset value at the end of the period and no
    sales or redemption charges. Total return would be reduced if a sales or
    redemption charge were taken into account.
(b) Class A, Class B, Class C, Institutional and Service share activity
    commenced on December 15, 1997.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per share amounts.
 
 
 
                                       13
<PAGE>
 
<TABLE>
<CAPTION>
                                         INCOME FROM                         DISTRIBUTIONS TO
                                   INVESTMENT OPERATIONS(E)                    SHAREHOLDERS
                           ---------------------------------------- ----------------------------------
                                                      NET REALIZED
                                                     AND UNREALIZED                         FROM NET      NET
                                                        LOSS ON                             REALIZED    INCREASE   NET
                 NET ASSET    NET      NET REALIZED     FOREIGN                IN EXCESS    GAIN ON    (DECREASE) ASSET
                  VALUE,   INVESTMENT AND UNREALIZED    CURRENCY     FROM NET    OF NET    INVESTMENT    IN NET   VALUE,
                 BEGINNING   INCOME   GAIN (LOSS) ON    RELATED     INVESTMENT INVESTMENT AND FUTURES    ASSET    END OF
                 OF PERIOD   (LOSS)    INVESTMENTS    TRANSACTIONS    INCOME     INCOME   TRANSACTIONS   VALUE    PERIOD
                 --------- ---------- -------------- -------------- ---------- ---------- ------------ ---------- ------
                                                                                                     ASIA GROWTH FUND
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>            <C>        <C>        <C>          <C>        <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $16.31     $  --        $(5.78)        $(2.12)      $   --     $(0.03)     $   --      $(7.93)  $8.38
1998--Class B
Shares..........   16.24      0.01         (5.79)         (2.12)          --      (0.03)         --       (7.93)   8.31
1998--Class C
Shares(b).......   15.73      0.01         (5.43)         (1.99)          --      (0.03)         --       (7.44)   8.29
1998--Institu-
tional Shares...   16.33      0.10         (5.83)         (2.13)       (0.03)        --          --       (7.89)   8.44
- ------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   16.49      0.06         (0.11)            --        (0.12)        --       (0.01)      (0.18)  16.31
1997--Class B
Shares(b).......   17.31     (0.05)        (0.48)            --        (0.51)     (0.03)         --       (1.07)  16.24
1997--Institu-
tional
Shares(b).......   16.61      0.04         (0.11)            --        (0.11)     (0.06)      (0.04)      (0.28)  16.33
- ------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares             13.31      0.17          3.44             --        (0.12)     (0.14)      (0.17)       3.18   16.49
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1995--Class A
Shares(b).......   14.18      0.11         (0.89)            --         0.01         --       (0.10)      (0.87)  13.31
<CAPTION>
                                                                                     RATIOS ASSUMING
                                                                                   NO VOLUNTARY WAIVER
                                                                                        OF FEES OR
                                                                                   EXPENSE LIMITATIONS
                                                                                  -----------------------
                                                     NET   RATIO OF   RATIO OF
                                                   ASSETS    NET        NET       RATIO OF    RATIO OF
                                                   AT END  EXPENSES  INVESTMENT   EXPENSES       NET
                                                     OF       TO       INCOME        TO      INVESTMENT
                              PORTFOLIO  AVERAGE   PERIOD  AVERAGE   (LOSS) TO    AVERAGE   INCOME (LOSS)
                   TOTAL      TURNOVER  COMMISSION   (IN     NET      AVERAGE       NET      TO AVERAGE
                 RETURN(A)      RATE     RATE(F)    000S)   ASSETS   NET ASSETS    ASSETS    NET ASSETS
                 ------------ --------- ---------- ------- --------- ------------ --------- -------------
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>          <C>       <C>        <C>     <C>       <C>          <C>       <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  (48.49)%     105.16%    $.0070   $87,437   1.75%      0.31%       1.99%        0.07%
1998--Class B
Shares..........  (48.70)      105.16      .0070     3,359   2.30      (0.29)       2.50        (0.49)
1998--Class C
Shares(b).......  (47.17)(d)   105.16      .0070       436   2.35(c)   (0.26)(c)    2.55(c)     (0.46)(c)
1998--Institu-
tional Shares...  (48.19)      105.16      .0070       874   1.11       0.87        1.31         0.67
- ------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   (1.01)       48.40      .0151   263,014   1.67       0.20        1.87         0.00
1997--Class B
Shares(b).......   (6.02)(d)    48.40      .0151     3,354   2.21(c)   (0.56)(c)    2.37(c)     (0.72)(c)
1997--Institu-
tional
Shares(b).......   (1.09)(d)    48.40      .0151    13,322   1.10(c)    0.54 (c)    1.26(c)      0.38 (c)
- ------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares             26.49        88.80         --   205,539   1.77       1.05        2.02         0.80
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1995--Class A
Shares(b).......   (5.46)(d)    36.08         --   124,298   1.90(c)    1.83(c)     2.38(c)      1.35(c)
</TABLE>
- ----
(a) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions, a complete redemption of
    the investment at the net asset value at the end of the period and no
    sales or redemption charges. Total return would be reduced if a sales or
    redemption charge were taken into account.
(b) Class A, Class B, Class C and Institutional share activity commenced on
    July 8, 1994, May 1, 1996, August 15, 1997 and February 2, 1996,
    respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
 
                                       14
<PAGE>
 
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
  The investment objectives and principal investment policies of each Fund are
described below. In particular, each Fund may employ certain currency
techniques to seek to hedge against currency exchange rate fluctuations or to
seek to increase total return. When used to seek to enhance return, these
management techniques are considered speculative. Such currency management
techniques involve risks different from those associated with investing solely
in securities of U.S. issuers quoted in U.S. dollars. To the extent that a
Fund is fully invested in foreign securities while also maintaining currency
positions, it may be exposed to greater combined risk. A Fund's net currency
positions may expose it to risks independent of its securities positions.
There can be no assurance that a Fund's investment objectives will be
achieved.
 
  The Investment Advisers may purchase for the Funds common stocks, preferred
stocks, interests in real estate investment trusts, convertible debt
obligations, convertible preferred stocks, bonds with attached warrants,
equity-related transferable securities, equity interests in trusts,
partnerships, joint ventures, limited liability companies and similar
enterprises, warrants and stock purchase rights ("equity securities"). In
choosing a Fund's securities, the Investment Advisers utilize first-hand
fundamental research, including visiting company facilities to assess
operations and to meet decision-makers. The Investment Advisers may also use
macro analysis of numerous economic and valuation variables to anticipate
changes in company earnings and the overall investment climate. The Investment
Advisers are able to draw on the research and market expertise of the Goldman
Sachs Global Investment Research Department and other affiliates of the
Investment Advisers, as well as information provided by other securities
dealers. Equity securities in a Fund's portfolio will generally be sold when
the Investment Adviser believes that the market price fully reflects or
exceeds the securities' fundamental valuation or when other more attractive
investments are identified. Other investment practices and management
techniques, which involve certain risks, are described below under
"Description of Securities," "Risk Factors" and "Investment Techniques."
 
  Actively Managed Funds. The International Equity, Japanese Equity,
International Small Cap, Emerging Markets Equity and Asia Growth Funds are
managed using an active international approach, which utilizes a consistent
process of stock selection undertaken by portfolio management teams located
within each of the major investment regions, including Europe, Japan, Asia and
the United States. In selecting securities, the Investment Adviser uses a
long-term, bottom-up strategy based on first-hand fundamental research that is
designed to give broad exposure to the available opportunities while seeking
to add return primarily through stock selection. Equity securities for these
Funds are evaluated based on three key factors--the business, the management
and the valuation. The Investment Adviser ordinarily seeks securities that
have, in the Investment Adviser's opinion, superior earnings growth potential,
sustainable franchise value with management attuned to creating shareholder
value and relatively discounted valuations. In addition, the Investment
Adviser uses a multi-factor risk model which seeks to assure that deviations
from the benchmark are justifiable.
 
  Quantitative Style Fund. The CORE International Equity Fund is managed using
both quantitative and fundamental techniques. CORE is an acronym for
"Computer-Optimized, Research-Enhanced," which reflects the CORE International
Equity Fund's investment process. This investment process and the proprietary
multifactor models used to implement it are discussed below.
 
                                      15
<PAGE>
 
  Investment Process. The Investment Adviser begins with a broad universe of
foreign equity securities for the CORE International Equity Fund. As described
more fully below, the Investment Adviser uses proprietary multifactor models
(each a "Multifactor Model") to forecast the returns of different markets,
currencies and individual securities. The Investment Adviser may rely on
research from both the Goldman Sachs Global Investment Research Department
(the "Research Department") and other industry sources.
 
  In building a diversified portfolio for the CORE International Equity Fund,
the Investment Adviser utilizes optimization techniques to seek to maximize
the Fund's expected return, while maintaining a risk profile similar to the
Fund's benchmark. The Fund's portfolio is primarily composed of securities
rated highest by the foregoing investment process and has risk characteristics
and industry weightings similar to the Fund's benchmark.
 
  Multifactor Models. The Multifactor Models are rigorous computerized rating
systems for forecasting the returns of different equity markets, currencies,
and individual equity securities according to fundamental investment
characteristics. The CORE International Equity Fund uses multiple Multifactor
Models to forecast returns. Currently, the CORE International Equity Fund uses
one model to forecast equity market returns, one model to forecast currency
returns and 22 separate models to forecast individual equity security returns
in 22 different countries. Despite this variety, all Multifactor Models
incorporate common variables covering measures of value, growth, momentum and
risk (e.g., book/price ratio, earnings/price ratio, price momentum, price
volatility, consensus growth forecasts, earnings estimate revisions, earnings
stability, currency momentum and country political risk ratings). All of the
factors used in the Multifactor Models have been shown to significantly impact
the performance of the securities, currencies and markets they were designed
to forecast.
 
  Because they include many disparate factors, the Investment Adviser believes
that all the Multifactor Models are broader in scope and provide a more
thorough evaluation than most conventional quantitative models. Securities and
markets ranked highest by the relevant Multifactor Model do not have one
dominant investment characteristic; rather, they possess an attractive
combination of investment characteristics.
 
  Research Department. In assigning ratings to equity securities, the Research
Department uses a four category rating system ranging from "recommended for
purchase" to "likely to underperform." The ratings reflect the analyst's
judgment as to the investment results of a specific security and incorporate
economic outlook, valuation, risk and a variety of other factors.
 
  By employing both a quantitative (i.e., the Multifactor Models) and a
qualitative (i.e., research enhanced) method of selecting securities, the CORE
International Equity Fund seeks to capitalize on the strengths of each
discipline.
 
 CORE INTERNATIONAL EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital. The Fund seeks to achieve its objective through a
broadly diversified portfolio of large cap equity securities of companies that
are organized outside the United States or whose securities are principally
traded outside the United States.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities of companies that are
organized outside the United States or whose securities are principally traded
outside the United States. The Fund seeks broad representation of large cap
issuers across major countries
 
                                      16
<PAGE>
 
and sectors of the international economy. The Fund's investments are selected
using both a variety of quantitative techniques and fundamental research in
seeking to maximize the Fund's expected return, while maintaining risk, style,
capitalization and industry characteristics similar to the EAFE Index. In
addition, the Fund seeks a portfolio composed of companies with attractive
valuations and stronger momentum characteristics than the EAFE Index.
 
  The Fund may allocate its assets among countries as determined by the
Investment Adviser from time to time, provided the Fund's assets are invested
in at least three foreign countries. The Fund may invest in securities of
issuers in Emerging Countries which involve certain risks, as described below
under "Risk Factors--Special Risks of Investments in the Asian and Other
Emerging Markets," which are not present in investments in more developed
countries.
 
  For a description of the investment process of the Fund, see "Investment
Objectives and Policies--Quantitative Style Fund."
 
  Other. The Fund may invest only in fixed-income securities that are
considered to be cash equivalents.
 
 INTERNATIONAL EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal circumstances,
substantially all, and at least 65%, of its total assets in equity securities
of companies that are organized outside the United States or whose securities
are principally traded outside the United States. The Fund may allocate its
assets among countries as determined by the Investment Adviser from time to
time provided that the Fund's assets are invested in at least three foreign
countries. The Fund expects to invest a substantial portion of its assets in
the securities of issuers located in the developed countries of Western Europe
and in Japan. However, the Fund may also invest in the securities of issuers
located in Australia, Canada, New Zealand and the Emerging Countries in which
the Emerging Markets Equity Fund may invest. Many of the countries in which
the Fund may invest have emerging markets or economies which involve certain
risks, as described below under "Risk Factors--Special Risks of Investments in
the Asian and Other Emerging Markets," which are not present in investments in
more developed countries. The Fund intends to invest in companies with public
stock market capitalizations that are larger than those in which the
International Small Cap Fund primarily intends to invest.
 
  Other. Up to 35% of the Fund's total assets may be invested in fixed-income
securities.
 
 JAPANESE EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal circumstances,
substantially all, and at least 65%, of its total assets in equity securities
of Japanese companies. Japanese companies include those organized under the
laws of Japan or whose shares are traded primarily on a Japanese stock
exchange as well as those whose shares are registered with the Japan
Securities Dealers Association for trading primarily on Japan's over-the-
counter market. The Fund's concentration in Japanese companies will expose it
to the risk of adverse social, political and economic events which occur in
Japan or affect the Japanese markets as described under "Risk Factors--Special
Risks of Investment in the Japanese Markets."
 
                                      17
<PAGE>
 
  Other. The Fund may invest in the aggregate up to 35% of its total assets in
equity securities of non-Japanese companies and in fixed-income securities.
 
 INTERNATIONAL SMALL CAP FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal market
circumstances, substantially all, and at least 65%, of its total assets in
equity securities of companies with public stock market capitalizations of $1
billion or less at the time of investment that are organized outside the U.S.
or whose securities are principally traded outside the U.S. The Fund may
allocate its assets among countries as determined by the Investment Adviser
from time to time provided that the Fund's assets are invested in at least
three foreign countries. The Fund expects to invest a substantial portion of
its assets in small cap securities of companies in the developed countries of
Western Europe, Japan and Asia. However, the Fund may also invest in the
securities of issuers located in Australia, Canada, New Zealand and the
Emerging Countries in which the Emerging Markets Equity Fund may invest. Many
of the countries in which the Fund may invest have emerging markets or
economies which involve certain risks, as described below under "Risk
Factors--Special Risks of Investments in the Asian and Other Emerging
Markets," which are not present in investments in more developed countries. If
the market capitalization of a company held by the Fund increases above $1
billion, the Fund may, consistent with its investment objective, continue to
hold the security.
 
  Other. The Fund may invest in the aggregate up to 35% of its total assets in
equity securities of larger cap companies with public stock market
capitalizations of more than $1 billion at the time of investment and in
fixed-income securities.
 
 EMERGING MARKETS EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal market
circumstances, substantially all, and at least 65%, of its total assets in
equity securities of Emerging Country issuers. For purposes of the Fund's
investment policies, Emerging Countries are countries with economies or
securities markets that are considered by the Investment Adviser not to be
fully developed. The Investment Adviser may consider classifications by the
World Bank, the International Finance Corporation or the United Nations and
its agencies in determining whether a country is emerging or developed.
Currently, Emerging Countries include among others, most Latin American,
African, Asian and Eastern European nations. The Investment Adviser currently
intends that the Fund's investment focus will be in the following Emerging
Countries: Argentina, Botswana, Brazil, Chile, China, Colombia, the Czech
Republic, Egypt, Greece, Hong Kong, Hungary, India, Indonesia, Israel, Jordan,
Kenya, Malaysia, Mexico, Morocco, Pakistan, Peru, the Philippines, Poland,
Portugal, Russia, Singapore, South Africa, South Korea, Sri Lanka, Taiwan,
Thailand, Turkey, Venezuela and Zimbabwe.
 
  An Emerging Country issuer is any entity that satisfies at least one of the
following criteria: (i) it derives 50% or more of its total revenue from goods
produced, sales made or services performed in one or more Emerging Countries;
(ii) it is organized under the laws of, or has a principal office in, an
Emerging Country; (iii) it maintains 50% or more of its assets in one or more
of the Emerging Countries; or (iv) the principal securities trading market for
a class of its securities is in an Emerging Country.
 
                                      18
<PAGE>
 
  Investments in Emerging Countries involve certain risks as described under
"Risk Factors--Special Risks of Investments in the Asian and Other Emerging
Markets," which are not present in investments in more developed countries.
The Fund may purchase privately placed equity securities, equity securities of
companies that are in the process of being privatized by foreign governments,
securities of issuers that have not paid dividends on a timely basis, equity
securities of issuers that have experienced difficulties, and securities of
companies without performance records.
 
  Other. Under normal circumstances, the Fund maintains investments in at
least six Emerging Countries, and will not invest more than 35% of its total
assets in securities of issuers in any one Emerging Country. Allocation of the
Fund's investments will depend upon the relative attractiveness of the
Emerging Country markets and particular issuers. In addition, macro-economic
factors and the portfolio managers' and Goldman Sachs economists' views of the
relative attractiveness of Emerging Countries and currencies are considered in
allocating the Fund's assets among Emerging Countries. Concentration of the
Fund's assets in one or a few Emerging Countries and currencies will subject
the Fund to greater risks than if the Fund's assets were not geographically
concentrated. See "Description of Securities--Foreign Investments" and "Risk
Factors." The Fund may invest in the aggregate up to 35% of its total assets
in (i) fixed-income securities of private and governmental Emerging Country
issuers; and (ii) equity and fixed-income securities of issuers in developed
countries.
 
 ASIA GROWTH FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal market
circumstances, substantially all, and at least 65%, of its total assets in
equity securities of companies that satisfy at least one of the following
criteria: (i) their securities are traded principally on stock exchanges in
one or more of the Asian countries; (ii) they derive 50% or more of their
total revenue from goods produced, sales made or services performed in one or
more of the Asian countries; (iii) they maintain 50% or more of their assets
in one or more of the Asian countries; or (iv) they are organized under the
laws of one of the Asian countries. The Fund seeks to achieve its objective by
investing primarily in equity securities of Asian companies which are
considered by the Investment Adviser to have long-term capital appreciation
potential. Many of the countries in which the Fund may invest have emerging
markets or economies which involve certain risks as described under "Risk
Factors--Special Risks of Investments in the Asian and Other Emerging
Markets," which are not present in investments in more developed countries.
The Fund may purchase equity securities of issuers that have not paid
dividends on a timely basis, securities of companies that have experienced
difficulties, and securities of companies without performance records.
 
  Other. The Fund may allocate its assets among the Asian countries as
determined from time to time by the Investment Adviser. For purposes of the
Fund's investment policies, Asian countries are China, Hong Kong, India,
Indonesia, Malaysia, Pakistan, the Philippines, Singapore, South Korea, Sri
Lanka, Taiwan and Thailand, as well as any other country in Asia (other than
Japan) to the extent that foreign investors are permitted by applicable law to
make such investments. Allocation of the Fund's investments will depend upon
the Investment Adviser's views of the relative attractiveness of the Asian
markets and particular issuers. For example, on January 31, 1998 (the end of
the Fund's last fiscal year), more than 35% of the Fund's assets were invested
in securities traded in Hong Kong. Concentration of the Fund's assets in one
or a few of the Asian countries and Asian currencies will subject the Fund to
greater risks than if the Fund's assets were not geographically
 
                                      19
<PAGE>
 
concentrated. See "Description of Securities--Foreign Investments." The Fund
may invest in the aggregate up to 35% of its total assets in equity securities
of issuers in other countries, including Japan, and in fixed-income
securities.
 
 
                           DESCRIPTION OF SECURITIES
 
  The Funds may invest in equity and fixed income securities in accordance
with the investment policies stated above. Certain of these permitted
investments are described in more detail in this section.
 
CONVERTIBLE SECURITIES
 
  Each Fund may invest in convertible securities, including debt obligations
and preferred stock of the issuer convertible at a stated exchange rate into
common stock of the issuer. Convertible securities generally offer lower
interest or dividend yields than non-convertible securities of similar
quality. As with all fixed-income securities, the market value of convertible
securities tends to decline as interest rates increase and, conversely, to
increase as interest rates decline. However, when the market price of the
common stock underlying a convertible security exceeds the conversion price,
the convertible security tends to reflect the market price of the underlying
common stock. As the market price of the underlying common stock declines, the
convertible security tends to trade increasingly on a yield basis, and thus
may not decline in price to the same extent as the underlying common stock.
Convertible securities rank senior to common stocks in an issuer's capital
structure and consequently entail less risk than the issuer's common stock. In
evaluating a convertible security, the Investment Adviser will give primary
emphasis to the attractiveness of the underlying common stock. The convertible
securities in which the Funds invest are not subject to any minimum rating
criteria. Convertible debt securities are equity investments for purposes of
each Fund's investment policies.
 
FOREIGN INVESTMENTS
 
  FOREIGN SECURITIES. Each Fund will invest in the securities of foreign
issuers. Investments in foreign securities may offer potential benefits that
are not available from investments exclusively in equity securities of
domestic issuers quoted in U.S. dollars. Foreign countries may have economic
policies or business cycles different from those of the U.S. and markets for
foreign securities do not necessarily move in a manner parallel to U.S.
markets.
 
  Investing in the securities of foreign issuers involves certain special
risks, including those set forth below, which are not typically associated
with investing in U.S. dollar-denominated or quoted securities of U.S.
issuers. Such investments may be affected by changes in currency rates,
changes in foreign or U.S. laws or restrictions applicable to such investments
and in exchange control regulations (e.g., currency blockage). A decline in
the exchange rate of the currency (i.e., weakening of the currency against the
U.S. dollar) in which a portfolio security is quoted or denominated relative
to the U.S. dollar would reduce the value of the portfolio security. In
addition, if the currency in which a Fund receives dividends, interest or
other payments declines in value against the U.S. dollar before such income is
distributed as dividends to shareholders or converted to U.S. dollars, the
Fund may have to sell portfolio securities to obtain sufficient cash to pay
such dividends. The expected introduction of a single currency, the euro, on
January 1, 1999 for participating European nations in the Economic and
Monetary Union ("EU") presents unique uncertainties, including whether the
payment and operational systems of banks and other financial institutions will
be ready by the scheduled launch date; the creation of suitable clearing and
settlement payment systems for the new currency; the legal treatment of
certain
 
                                      20
<PAGE>
 
outstanding financial contracts after January 1, 1999 that refer to existing
currencies rather than the euro; the establishment and maintenance of exchange
rates for currencies being converted into the euro; the fluctuation of the
euro relative to non-euro currencies during the transition period from January
1, 1999 to December 31, 2000 and beyond; whether the interest rate, tax and
labor regimes of European countries participating in the Fund will converge
over time; and whether the conversion of the currencies of other EU countries
such as the United Kingdom, Denmark and Greece into the euro and the admission
of other non-EU countries such as Poland, Latvia and Lithuania as members of
the EU may have an impact on the euro. These or other factors, including
political and economic risks, could cause market disruptions before or after
the introduction of the euro, and could adversely affect the value of
securities and foreign currencies held by the Funds. Commissions on
transactions in foreign securities may be higher than those for similar
transactions on domestic stock markets. In addition, clearance and settlement
procedures may be different in foreign countries and, in certain markets, such
procedures have been unable to keep pace with the volume of securities
transactions, thus making it difficult to conduct such transactions.
 
  Foreign issuers are not generally subject to uniform accounting, auditing
and financial reporting standards comparable to those applicable to U.S.
issuers. There may be less publicly available information about a foreign
issuer than about a U.S. issuer. In addition, there is generally less
government regulation of foreign markets, companies and securities dealers
than in the United States. Foreign securities markets may have substantially
less volume than U.S. securities markets and securities of many foreign
issuers are less liquid and more volatile than securities of comparable
domestic issuers. Furthermore, with respect to certain foreign countries,
there is a possibility of nationalization, expropriation or confiscatory
taxation, imposition of withholding or other taxes on dividend or interest
payments (or, in some cases, capital gains), limitations on the removal of
funds or other assets of the Funds, political or social instability or
diplomatic developments which could affect investments in those countries.
 
  Concentration of a Fund's assets in one or a few countries and currencies
will subject a Fund to greater risks than if a Fund's assets were not
geographically concentrated.
 
  INVESTMENTS IN ADRS, EDRS AND GDRS. Each Fund may invest in foreign
securities which take the form of sponsored and unsponsored American
Depository Receipts ("ADRs"), Global Depository Receipts ("GDRs"), European
Depository Receipts ("EDRs") or other similar instruments representing
securities of foreign issuers (together, "Depository Receipts"). ADRs
represent the right to receive securities of foreign issuers deposited in a
domestic bank or a correspondent bank. Prices of ADRs are quoted in U.S.
dollars, and ADRs are traded in the United States on exchanges or over-the-
counter and are sponsored and issued by domestic banks. EDRs and GDRs are
receipts evidencing an arrangement with a non-U.S. bank. EDRs and GDRs are not
necessarily quoted in the same currency as the underlying security. To the
extent a Fund acquires Depository Receipts through banks which do not have a
contractual relationship with the foreign issuer of the security underlying
the Depository Receipts to issue and service such Depository Receipts
(unsponsored Depository Receipts), there may be an increased possibility that
the Fund would not become aware of and be able to respond to corporate
actions, such as stock splits or rights offerings involving the foreign
issuer, in a timely manner. In addition, the lack of information may result in
inefficiencies in the valuation of such instruments. Investment in Depository
Receipts does not eliminate all the risks inherent in investing in securities
of non-U.S. issuers. The market value of Depository Receipts is dependent upon
the market value of the underlying securities and fluctuations in the relative
value of the currencies in which the Depository Receipt and the underlying
securities are quoted. However, by investing in Depository Receipts, such as
ADRs, that are quoted in U.S. dollars, a Fund may avoid currency risks during
the settlement period for purchases and sales.
 
                                      21
<PAGE>
 
  FOREIGN CURRENCY TRANSACTIONS. Because investment in foreign issuers will
usually involve currencies of foreign countries, and because each Fund may
have currency exposure independent of its securities positions, the value of
the assets of a Fund as measured in U.S. dollars will be affected by changes
in foreign currency exchange rates. A Fund may, to the extent it invests in
foreign securities, purchase or sell foreign currencies on a spot basis and
may also purchase or sell forward foreign currency exchange contracts for
hedging purposes and to seek to protect against anticipated changes in future
foreign currency exchange rates. In addition, each Fund may enter into such
contracts to seek to increase total return when the Investment Adviser
anticipates that the foreign currency will appreciate or depreciate in value,
but securities denominated or quoted in that currency do not present
attractive investment opportunities and are not held in the Fund's portfolio.
When entered into to seek to enhance return, forward foreign currency exchange
contracts are considered speculative. Each Fund may also engage in cross-
hedging by using forward contracts in a currency different from that in which
the hedged security is denominated or quoted if the Investment Adviser
determines that there is a pattern of correlation between the two currencies.
If a Fund enters into a forward foreign currency exchange contract to buy
foreign currency for any purpose or to sell foreign currency to seek to
increase total return, the Fund will segregate cash or liquid assets in an
amount equal to the value of the Fund's total assets committed to the
consummation of the forward contract, or otherwise cover its position in a
manner permitted by the SEC. The Fund will incur costs in connection with
conversions between various currencies. A Fund may hold foreign currency
received in connection with investments in foreign securities when, in the
judgment of the Investment Adviser, it would be beneficial to convert such
currency into U.S. dollars at a later date, based on anticipated changes in
the relevant exchange rate.
 
  Currency exchange rates may fluctuate significantly over short periods of
time causing, along with other factors, a Fund's NAV to fluctuate. Currency
exchange rates generally are determined by the forces of supply and demand in
the foreign exchange markets and the relative merits of investments in
different countries, actual or anticipated changes in interest rates and other
complex factors, as seen from an international perspective. Currency exchange
rates also can be affected unpredictably by the intervention of U.S. or
foreign governments or central banks, or the failure to intervene, or by
currency controls or political developments in the U.S. or abroad. To the
extent that a substantial portion of a Fund's total assets, adjusted to
reflect the Fund's net position after giving effect to currency transactions,
is denominated or quoted in the currencies of foreign countries, the Fund will
be more susceptible to the risk of adverse economic and political developments
within those countries.
 
  The market in forward foreign currency exchange contracts, currency swaps
and other privately negotiated currency instruments offers less protection
against defaults by the other party to such instruments than is available for
currency instruments traded on an exchange. Such contracts are subject to the
risk that the counterparty to the contract will default on its obligations.
Since these contracts are not guaranteed by an exchange or clearinghouse, a
default on the contract would deprive the Fund of unrealized profits,
transaction costs or the benefits of a currency hedge or force the Fund to
cover its purchase or sale commitments, if any, at the current market price. A
Fund will not enter into forward foreign currency exchange contracts, currency
swaps or other privately negotiated currency instruments unless the credit
quality of the unsecured senior debt or the claims-paying ability of the
counterparty is considered to be investment grade by the Investment Adviser.
 
  Each Fund may also engage in a variety of foreign currency management
techniques. However, due to the limited market for these instruments with
respect to the currencies of many Emerging Countries, including certain Asian
countries, the Investment Advisers do not currently anticipate that a
significant portion of International Equity, International Small Cap, Emerging
Markets Equity or Asia Growth Fund's currency exposure will be covered by such
instruments. For a discussion of such instruments and the risks associated
with their use, see "Investment Objective and Policies" in the Additional
Statement.
 
                                      22
<PAGE>
 
FIXED-INCOME SECURITIES
 
  Each Fund may invest in fixed-income securities, including U.S. Government
securities, corporate debt obligations, obligations issued by U.S. or foreign
banks (including without limitation, time deposits, bankers' acceptances and
certificates of deposit), mortgage-backed securities (including stripped
mortgage-backed securities) and asset-backed securities.
 
  Investments in fixed-income securities may include obligations of foreign
governments and governmental agencies, including those of Emerging Countries.
Investment in sovereign debt obligations involves special risks not present in
debt obligations of corporate issuers. The issuer of the debt or the
governmental authorities that control the repayment of the debt may be unable
or unwilling to repay principal or interest when due in accordance with the
terms of such debt, and a Fund may have limited recourse in the event of a
default. Periods of economic uncertainty may result in the volatility of
market prices of sovereign debt, and in turn a Fund's NAV, to a greater extent
than the volatility inherent in debt obligations of U.S. issuers. A sovereign
debtor's willingness or ability to repay principal and pay interest in a
timely manner may be affected by, among other factors, its cash flow
situation, the extent of its foreign currency reserves, the availability of
sufficient foreign exchange on the date a payment is due, the relative size of
the debt service burden to the economy as a whole, the sovereign debtor's
policy toward international lenders and the political constraints to which a
sovereign debtor may be subject.
 
  Fixed-income investments may also include investments in structured
securities. The value of the principal of and/or interest on such securities
is determined by reference to changes in the value of specific currencies,
interest rates, commodities, indices or other financial indicators (the
"Reference") or the relative change in two or more References. The interest
rate or the principal amount payable upon maturity or redemption may be
increased or decreased depending upon changes in the applicable Reference. The
terms of the structured securities may provide that in certain circumstances
no principal is due at maturity and, therefore, result in the loss of a Fund's
investment. Structured securities may be positively or negatively indexed, so
that appreciation of the Reference may produce an increase or decrease in the
interest rate or value of the security at maturity. In addition, changes in
the interest rates or the value of the security at maturity may be a multiple
of changes in the value of the Reference. Consequently, structured securities
may entail a greater degree of market risk than other types of fixed-income
securities. Structured securities may also be more volatile, less liquid and
more difficult to price accurately than less complex securities.
 
  Each Fund (other than the CORE International Equity Fund, which only invests
in debt instruments that are cash equivalents) may invest up to 35% of its
total assets in debt securities which are unrated or rated in the lowest
rating categories by Standard & Poor's Ratings Group ("Standard & Poor's") or
Moody's Investors Service, Inc. ("Moody's") (i.e., BB or lower by Standard &
Poor's or Ba or lower by Moody's), including securities rated D by Moody's or
Standard & Poor's. Fixed-income securities rated BB or Ba or below (or
comparable unrated securities) are commonly referred to as "junk bonds" and
are considered predominantly speculative and may be questionable as to
principal and interest payments. In some cases, such bonds may be highly
speculative, have poor prospects for reaching investment grade standing and be
in default. As a result, investment in such bonds will entail greater
speculative risks than those associated with investment in investment grade
bonds. Also, to the extent that the rating assigned to a security in a Fund's
portfolio is downgraded by a rating organization, the market price and
liquidity of such security may be adversely affected. See Appendix A to the
Additional Statement for a description of the corporate bond ratings assigned
by Standard & Poor's and Moody's.
 
                                      23
<PAGE>
 
REAL ESTATE INVESTMENT TRUSTS ("REITS")
 
  Each Fund may invest in REITs, which are pooled investment vehicles that
invest primarily in either real estate or real estate related loans. The value
of a REIT is affected by changes in the value of the properties owned by the
REIT or securing mortgage loans held by the REIT. REITs are dependent upon
cash flow from their investments to repay financing costs and the ability of
the REITs' managers. REITs are also subject to risks generally associated with
investments in real estate. A Fund will indirectly bear its proportionate
share of any expenses, including management fees, paid by a REIT in which it
invests.
 
 
                             INVESTMENT TECHNIQUES
 
OPTIONS ON SECURITIES AND SECURITIES INDICES
 
  Each Fund may write (sell) covered call and put options and purchase call
and put options on any securities in which it may invest or on any securities
index composed of securities in which it may invest. The writing and purchase
of options is a highly specialized activity which involves investment
techniques and risks different from those associated with ordinary portfolio
securities transactions. The use of options to seek to increase total return
involves the risk of loss if the Investment Adviser is incorrect in its
expectation of fluctuations in securities prices or interest rates. The
successful use of options for hedging purposes also depends in part on the
ability of the Investment Adviser to manage future price fluctuations and the
degree of correlation between the options and securities markets. If the
Investment Adviser is incorrect in its expectation of changes in securities
prices or determination of the correlation between the securities indices on
which options are written and purchased and the securities in a Fund's
investment portfolio, the investment performance of the Fund will be less
favorable than it would have been in the absence of such options transactions.
The writing of options could significantly increase a Fund's portfolio
turnover rate and, therefore, associated brokerage commissions or spreads.
 
OPTIONS ON FOREIGN CURRENCIES
 
  A Fund may, to the extent it invests in foreign securities, purchase and
sell (write) call and put options on foreign currencies for the purpose of
protecting against declines in the U.S. dollar value of foreign portfolio
securities and anticipated dividends on such securities and against increases
in the U.S. dollar cost of foreign securities to be acquired. In addition,
each Fund may use options on currency to cross-hedge, which involves writing
or purchasing options on one currency to hedge against changes in exchange
rates for a different currency, if there is a pattern of correlation between
the two currencies. As with other kinds of options transactions, however, the
writing of an option on a foreign currency will constitute only a partial
hedge, up to the amount of the premium received. If an option that a Fund has
written is exercised, the Fund could be required to purchase or sell foreign
currencies at disadvantageous exchange rates, thereby incurring losses. The
purchase of an option on foreign currency may constitute an effective hedge
against exchange rate fluctuations; however, in the event of exchange rate
movements adverse to a Fund's position, the Fund may forfeit the entire amount
of the premium plus related transaction costs. In addition to purchasing put
and call options for hedging purposes, each Fund may purchase call or put
options on currency to seek to increase total return when the Investment
Adviser anticipates that the currency will appreciate or depreciate in value,
but the securities quoted or denominated in that currency do not present
attractive investment opportunities and are not held in the Fund's portfolio.
When purchased or sold to seek to increase total return, options on currencies
are considered speculative. Options on foreign currencies written or purchased
by the Funds are traded on U.S. and foreign exchanges or over-the-counter.
 
                                      24
<PAGE>
 
FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS
 
  To seek to increase total return or to hedge against changes in interest
rates, securities prices or currency exchange rates, a Fund may purchase and
sell various kinds of futures contracts, and purchase and write call and put
options on any of such futures contracts. Each Fund may also enter into
closing purchase and sale transactions with respect to any such contracts and
options. The futures contracts may be based on various securities, foreign
currencies, securities indices and other financial instruments and indices,
whether domestic or foreign. A Fund will engage in futures and related options
transactions for bona fide hedging purposes as defined in regulations of the
Commodity Futures Trading Commission or to seek to increase total return to
the extent permitted by such regulations. A Fund may not purchase or sell
futures contracts or purchase or sell related options to seek to increase
total return, except for closing purchase or sale transactions, if immediately
thereafter the sum of the amount of initial margin deposits and premiums paid
on the Fund's outstanding positions in futures and related options entered
into for the purpose of seeking to increase total return would exceed 5% of
the market value of the Fund's net assets. These transactions involve
brokerage costs, require margin deposits and, in the case of contracts and
options obligating a Fund to purchase securities or currencies, require the
Fund to segregate and maintain cash or liquid assets with a value equal to the
amount of the Fund's obligations or to otherwise cover the obligations in a
manner permitted by the SEC.
 
  While transactions in futures contracts and options on futures may reduce
certain risks, such transactions themselves entail certain other risks. See
"Investment Objectives and Policies--Futures Contracts and Options on Futures
Contracts" in the Additional Statement. Thus, while a Fund may benefit from
the use of futures and options on futures, unanticipated changes in interest
rates, securities prices or currency exchange rates may result in poorer
overall performance than if the Fund had not entered into any futures
contracts or options transactions. Because perfect correlation between a
futures position and portfolio position that is intended to be protected is
impossible to achieve, the desired protection may not be obtained and a Fund
may be exposed to risk of loss. The loss incurred by a Fund in entering into
futures contracts and in writing call options on futures is potentially
unlimited and may exceed the amount of the premium received. Futures markets
are highly volatile and the use of futures may increase the volatility of a
Fund's NAV. The profitability of a Fund's trading in futures to seek to
increase total return depends upon the ability of the Investment Adviser to
analyze correctly the futures markets. In addition, because of the low margin
deposits normally required in futures trading, a relatively small price
movement in a futures contract may result in substantial losses to a Fund.
Further, futures contracts and options on futures may be illiquid, and
exchanges may limit fluctuations in futures contract prices during a single
day. The Funds may engage in futures transactions on both U.S. and foreign
exchanges. Foreign exchanges may not provide the same protections as U.S.
exchanges.
 
EQUITY SWAPS
 
  Each Fund may invest up to 10% of its total assets in equity swaps. Equity
swaps allow the parties to a swap agreement to exchange the dividend income or
other components of return on an equity investment (e.g., a group of equity
securities or an index) for a component of return on another non-equity or
equity investment. An equity swap may be used by a Fund to invest in a market
without owning or taking physical custody of securities in circumstances in
which direct investment may be restricted for legal reasons or is otherwise
impractical. Equity swaps are derivatives and their value can be very
volatile. To the extent that the Investment Adviser does not accurately
analyze and predict the potential relative fluctuation of the components
swapped with another party, a Fund may suffer a loss. The value of some
components of an equity swap (such as the dividends on a common stock) may
also be sensitive to changes in interest rates. Furthermore, during the period
a swap is
 
                                      25
<PAGE>
 
outstanding, a Fund may suffer a loss if the counterparty defaults. In
connection with its investments in equity swaps, a Fund will either segregate
cash or liquid assets or otherwise cover its obligations in a manner required
by the SEC.
 
WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS
 
  Each Fund may purchase when-issued securities. When-issued transactions
arise when securities are purchased by a Fund with payment and delivery taking
place in the future in order to secure what is considered to be an
advantageous price and yield to the Fund at the time of entering into the
transaction. Each Fund may also purchase or sell securities on a forward
commitment basis; that is, make contracts to purchase or sell securities for a
fixed price at a future date beyond the customary settlement period. The
purchase of securities on a when-issued or forward commitment basis involves a
risk of loss if the value of the security to be purchased declines prior to
the settlement date. Conversely, securities sold on a forward commitment basis
involve the risk that the value of the securities to be sold may increase
prior to the settlement date. Although a Fund would generally purchase
securities on a when-issued or forward commitment basis with the intention of
acquiring securities for its portfolio, a Fund may dispose of when-issued
securities or forward commitments prior to settlement if the Investment
Adviser deems it appropriate to do so. A Fund will segregate cash or liquid
assets in an amount sufficient to meet the purchase price until three days
prior to the settlement date. Alternatively, each Fund may enter into
offsetting contracts for the forward sale of other securities that it owns.
 
ILLIQUID AND RESTRICTED SECURITIES
 
  A Fund will not invest more than 15% of its net assets in illiquid
investments, which include securities (both foreign and domestic) that are not
readily marketable, certain stripped mortgage-backed securities, repurchase
agreements maturing in more than seven days, time deposits with a notice or
demand period of more than seven days, certain over-the-counter options, and
certain restricted securities, unless it is determined, based upon a review of
the trading markets for a specific restricted security, that such restricted
security is eligible for resale pursuant to Rule 144A under the Securities Act
of 1933 and, therefore, is liquid. The Trustees have adopted guidelines under
which the Investment Adviser determines and monitors the liquidity of
portfolio securities, subject to the oversight of the Trustees. Investing in
restricted securities eligible for resale pursuant to Rule 144A may decrease
the liquidity of a Fund's portfolio to the extent that qualified institutional
buyers become for a time uninterested in purchasing these restricted
securities. The purchase price and subsequent valuation of restricted and
illiquid securities normally reflect a discount, which may be significant,
from the market price of comparable securities for which a liquid market
exists.
 
REPURCHASE AGREEMENTS
 
  Each Fund may enter into repurchase agreements with dealers in U.S.
Government securities and member banks of the Federal Reserve System which
furnish collateral at least equal in value or market price to the amount of
their repurchase obligation. Each Fund may also enter into repurchase
agreements involving certain foreign government securities. If the other party
or "seller" defaults, a Fund might suffer a loss to the extent that the
proceeds from the sale of the underlying securities and other collateral held
by the Fund in connection with the related repurchase agreement are less than
the repurchase price. In addition, in the event of bankruptcy of the seller or
failure of the seller to repurchase the securities as agreed, a Fund could
suffer losses, including loss of interest on or principal of the security and
costs associated with delay and enforcement of the repurchase agreement. The
Trustees have reviewed and approved certain counterparties whom they believe
to be creditworthy and have authorized the Funds to enter into repurchase
agreements with such counterparties. In addition, each Fund, together with
other registered investment companies having management agreements with an
Investment Adviser or its affiliates may transfer uninvested cash balances
into a single joint account, the daily aggregate balance of which will be
invested in one or more repurchase agreements.
 
                                      26
<PAGE>
 
LENDING OF PORTFOLIO SECURITIES
 
  Each Fund may seek to increase its income by lending portfolio securities.
Under present regulatory policies, such loans may be made to institutions,
such as certain broker-dealers, and are required to be secured continuously by
collateral in cash, cash equivalents, or U.S. Government securities maintained
on a current basis in an amount at least equal to the market value of the
securities loaned. Cash collateral may be invested in cash equivalents. If an
Investment Adviser determines to make securities loans, the value of the
securities loaned may not exceed 33 1/3% of the value of the total assets of a
Fund (including the loan collateral). A Fund may experience a loss or delay in
the recovery of its securities if the institution with which it has engaged in
a portfolio loan transaction breaches its agreement with the Fund.
 
SHORT SALES AGAINST-THE-BOX
 
  Each Fund (other than the CORE International Equity Fund) may make short
sales of securities or maintain a short position, provided that at all times
when a short position is open the Fund owns an equal amount of such securities
or securities convertible into or exchangeable for, without payment of any
further consideration, for an equal amount of the securities of the same
issuer as the securities sold short (a short sale against-the-box). Not more
than 25% of a Fund's net assets (determined at the time of the short sale) may
be subject to such short sales. As a result of recent tax legislation, short
sales may not generally be used to defer the recognition of gain for tax
purposes with respect to appreciated securities in a Fund's portfolio.
 
TEMPORARY INVESTMENTS
 
  Each Fund may, for temporary defensive purposes, invest 100% of its total
assets (except that the CORE International Equity Fund and Emerging Markets
Equity Fund may only hold up to 35% of their respective total assets) in U.S.
Government securities, repurchase agreements collateralized by U.S. Government
securities, commercial paper rated at least A-2 by Standard & Poor's or P-2 by
Moody's, certificates of deposit, bankers' acceptances, repurchase agreements,
non-convertible preferred stocks, non-convertible corporate bonds with a
remaining maturity of less than one year. When a Fund's assets are invested in
such instruments, the Fund may not be achieving its investment objective.
 
MISCELLANEOUS TECHNIQUES
 
  In addition to the techniques and investments described above, each Fund
may, with respect to no more than 5% of its net assets, engage in the
following techniques and investments: (i) warrants and stock purchase rights;
(ii) currency swaps; (iii) other investment companies including World Equity
Benchmark Shares and Standard & Poor's Depository Receipts; (iv) unseasoned
companies; and (v) custodial receipts.
 
  In addition, each Fund may borrow up to 33 1/3% of its total assets from
banks for temporary or emergency purposes. A Fund may not make additional
investments if borrowings exceed 5% of its total assets. For more information,
see the Additional Statement.
 
                                      27
<PAGE>
 
 
                                 RISK FACTORS
 
  RISKS OF INVESTING IN EQUITY SECURITIES. In general, the Funds are subject
to the risks associated with investments in common stocks and other equity
securities. Stock values fluctuate in response to the activities of individual
companies and in response to general market and economic conditions and,
accordingly, the value of the stocks that a Fund holds may decline over short
or extended periods. Stock markets tend to be cyclical, with periods when
stock prices generally rise and periods when prices generally decline. As of
the date of this Prospectus, certain foreign stock markets were trading at or
close to record high levels and there can be no guarantee that such levels
will continue.
 
  RISKS OF INVESTING IN SMALL CAPITALIZATION COMPANIES. Investing in the
securities of such companies involves greater risk and the possibility of
greater portfolio price volatility. Historically, small market capitalization
stocks and stocks of recently organized companies have been more volatile in
price than larger market capitalization stocks included in the S&P 500 Index.
Among the reasons for the greater price volatility of these small company and
unseasoned stocks are the less certain growth prospects of smaller firms, less
institutional investor interest and the lower degree of liquidity in the
markets for such stocks.
 
  SPECIAL RISKS OF INVESTMENTS IN THE ASIAN AND OTHER EMERGING
MARKETS. Investing in the securities of issuers in Emerging Countries involves
risks in addition to those discussed under "Description of Securities--Foreign
Investments." The International Equity, International Small Cap, Emerging
Markets Equity and Asia Growth Funds may each invest without limit in the
securities of issuers in Emerging Countries. The CORE International Equity
Fund may invest up to 25% of its total assets in securities of issuers in
Emerging Countries. Emerging Countries are generally located in the Asia-
Pacific region, Eastern Europe, Latin and South America and Africa. A Fund's
purchase and sale of portfolio securities in certain Emerging Countries may be
constrained by limitations as to daily changes in the prices of listed
securities, periodic trading or settlement volume and/or limitations on
aggregate holdings of foreign investors. Such limitations may be computed
based on the aggregate trading volume by or holdings of a Fund, the Investment
Adviser, its affiliates and their respective clients and other service
providers. A Fund may not be able to sell securities in circumstances where
price, trading or settlement volume limitations have been reached.
 
  Foreign investment in the securities markets of certain Emerging Countries
is restricted or controlled to varying degrees which may limit investment in
such Countries or increase the administrative costs of such investments. For
example, certain Asian countries require governmental approval prior to
investments by foreign persons or limit investment by foreign persons to only
a specified percentage of an issuer's outstanding securities or a specific
class of securities which may have less advantageous terms (including price)
than securities of the issuer available for purchase by nationals. In
addition, certain countries may restrict or prohibit investment opportunities
in issuers or industries deemed important to national interests. Such
restrictions may affect the market price, liquidity and rights of securities
that may be purchased by a Fund. The repatriation of both investment income
and capital from certain Emerging Countries is subject to restrictions such as
the need for governmental consents. Due to restrictions on direct investment
in equity securities in certain Asian countries, such as Taiwan, it is
anticipated that a Fund may invest in such countries only through other
investment funds in such countries. See "Other Investment Companies" in the
Additional Statement.
 
  Many Emerging Countries may be subject to a greater degree of economic,
political and social instability than is the case in Western Europe, the
United States, Canada, Australia, New Zealand and Japan. Many
 
                                      28
<PAGE>
 
Emerging Countries do not have fully democratic governments. For example,
governments of some Emerging Countries are authoritarian in nature or have
been installed or removed as a result of military coups, while governments in
other Emerging Countries have periodically used force to suppress civil
dissent. Disparities of wealth, the pace and success of democratization, and
ethnic, religious and racial disaffection, among other factors, have also led
to social unrest, violence and/or labor unrest in some Asian and other
Emerging Countries. Unanticipated political or social developments may affect
the values of a Fund's investments. Investing in Emerging Countries involves
the risk of loss due to expropriation, nationalization, confiscation of assets
and property or the imposition of restrictions on foreign investments and on
repatriation of capital invested. Starting in mid-1997 some Pacific region
countries began to experience currency devaluations that resulted in high
interest rate levels and sharp reductions in economic activity. This situation
resulted in a significant drop in the securities prices of companies located
in the region. Some countries have experienced government intervention, have
sought assistance from the International Monetary Fund and are undergoing
substantial domestic unrest. Although some countries are taking steps to
restructure their financial sectors in a manner that may facilitate a return
to long-term economic growth, there can be no assurance that these efforts
will be successful or that their current problems will not persist. At the end
of its last fiscal year, a substantial portion of the assets of the Asia
Growth Fund were invested in securities traded in the Hong Kong market. In
1997, the sovereignty of Hong Kong reverted from the United Kingdom to China.
Although Hong Kong is, by law, to maintain a high degree of autonomy, there
can also be no assurance that the general economic position of Hong Kong will
not be adversely affected as a result of the exercise of Chinese sovereignty
over Hong Kong. In particular, business confidence in Hong Kong can be
significantly affected by political developments and statements by public
figures in China, which can in turn affect the performance of the securities
markets. In addition, the reversion of Hong Kong to China has created
uncertainty as to future currency valuations relative to the U.S. dollar. Any
future valuation changes could be adverse from the perspective of U.S.
investors.
 
  Economies in individual Emerging Countries may differ favorably or
unfavorably from the U.S. economy in such respects as growth of gross domestic
product, rates of inflation, currency valuation, capital reinvestment,
resource self-sufficiency and balance of payments positions. Many Emerging
Countries have experienced currency devaluations and substantial and, in some
cases, extremely high rates of inflation, which have a negative effect on the
economies and securities markets of such Emerging Countries. Economies in
Emerging Countries generally are dependent heavily upon commodity prices and
international trade and, accordingly, have been and may continue to be
affected adversely by the economies of their trading partners, trade barriers,
exchange controls, managed adjustments in relative currency values and other
protectionist measures imposed or negotiated by the countries with which they
trade.
 
  Brokerage commissions, custodial services and other costs relating to
investment in international securities markets generally are more expensive
than in the United States. A Fund's investment in Emerging Countries may also
be subject to withholding or other taxes, which may be significant and may
reduce the return from an investment in such country to the Fund. Settlement
procedures in Emerging Countries are frequently less developed and reliable
than those in the United States and may involve a Fund's delivery of
securities before receipt of payment for their sale. In addition, significant
delays are common in certain markets in registering the transfer of
securities. Settlement or registration problems may make it more difficult for
a Fund to value its portfolio securities and could cause the Fund to miss
attractive investment opportunities, to have a portion of its assets
uninvested or to incur losses due to the failure of a counterparty to pay for
securities the Fund has delivered or the Fund's inability to complete its
contractual obligations.
 
  Currently, there is no market or only a limited market for many of the
management techniques and instruments with respect to the currencies and
securities markets of the Emerging Countries. Consequently, there
 
                                      29
<PAGE>
 
can be no assurance that suitable instruments for hedging currency and market-
related risks will be available at the times when a Fund wishes to use them.
 
  SPECIAL RISKS OF INVESTMENTS IN THE JAPANESE MARKETS. The Japanese Equity
Fund invests primarily in equity securities of Japanese companies.
Accordingly, the Japanese Equity Fund's performance will be closely tied to
economic and market conditions in Japan, and may be more volatile than more
geographically diversified funds. Changes in regulatory, as well as tax or
economic, policy in Japan could significantly affect the Japanese securities
markets and, therefore, the Japanese Equity Fund's performance.
 
  Japan's economy, the second largest in the world, has grown substantially
over the last three decades. Since 1990, however, Japan's economic growth has
declined significantly, and is currently subject to deflationary pressures. In
addition to this economic downturn, Japan is undergoing structural adjustments
related to high wages and taxes, currency valuations and structural
rigidities. Japan has also been experiencing notable uncertainty and loss of
public confidence in connection with the reform of its political process and
the deregulation of its economy. These conditions present risks to the
Japanese Equity Fund and its ability to attain its investment objective.
 
  Japan's economy is heavily dependent upon international trade, and is
especially sensitive to trade barriers and disputes. In particular, Japan
relies on large imports of agricultural products, raw materials and fuels. A
substantial rise in world oil or commodity prices, or a fall-off in Japan's
manufactured exports, could be expected to adversely affect Japan's economy.
In addition, Japan is vulnerable to earthquakes, volcanoes and other natural
disasters. As of the date of this Prospectus, Japan's banking industry
continued to suffer from non-performing loans, declining real estate values
and lower valuations of securities holdings.
 
  The Japanese securities markets are less regulated than the U.S. markets.
Evidence has emerged from time to time of distortion of market prices to serve
political or other purposes. Shareholders' rights are also not always equally
enforced.
 
  The common stocks of many Japanese companies trade at high price-earnings
ratios. Differences in accounting methods make it difficult to compare the
earnings of Japanese companies with those of companies in other countries,
especially the U.S. In general, however, reported net income in Japan is
understated relative to U.S. accounting standards and this is one reason
price-earnings ratios of the stocks of Japanese companies have tended
historically to be higher than those of U.S. stocks. In addition, Japanese
companies have tended to have higher growth rates than U.S. companies, and
Japanese interest rates have generally been lower than U.S. interest rates.
These factors have contributed to lower discount rates and higher price-
earnings ratios in Japan than in the U.S.
 
  During the recent past, the average stock market prices of Japanese
companies, as measured by major indices such as the NIKKEI 225 Average, have
experienced a substantial decline. It is not possible to determine whether
this general decline will continue.
 
  RISKS OF INVESTING IN FIXED-INCOME SECURITIES. When interest rates decline,
the market value of fixed- income securities tends to increase. Conversely,
when interest rates increase, the market value of fixed income securities
tends to decline. Volatility of a security's market value will differ
depending upon the security's duration, the issuer and the type of instrument.
Investments in fixed-income securities are subject to the risk that the issuer
could default on its obligations and a Fund could sustain losses on such
investments. A default could impact both interest and principal payments.
 
                                      30
<PAGE>
 
  RISKS OF DERIVATIVE TRANSACTIONS. A Fund's transactions, if any, in options,
futures, options on futures, swaps, structured securities and currency
transactions involve certain risks, including a possible lack of correlation
between changes in the value of hedging instruments and the portfolio assets
(if any) being hedged, the potential illiquidity of the markets for derivative
instruments, the risks arising from margin requirements and related leverage
factors associated with such transactions. The use of these management
techniques to seek to increase total return may be regarded as a speculative
practice and involves the risk of loss if the Investment Adviser is incorrect
in its expectation of fluctuations in securities prices, interest rates or
currency prices. A Fund's use of certain derivative transactions may be
limited by the requirements of the Internal Revenue Code of 1986, as amended
(the "Code"), for qualification as a regulated investment company.
 
 
                            INVESTMENT RESTRICTIONS
 
  Each Fund is subject to certain investment restrictions that are described
in detail under "Investment Restrictions" in the Additional Statement.
Fundamental investment restrictions of a Fund cannot be changed without
approval of a majority of the outstanding Shares of that Fund as defined in
the Additional Statement. Each Fund's investment objectives and all policies
not specifically designated as fundamental are non-fundamental and may be
changed without shareholder approval. If there is a change in a Fund's
investment objectives, shareholders should consider whether that Fund remains
an appropriate investment in light of their then current financial positions
and needs.
 
 
                              PORTFOLIO TURNOVER
 
  A high rate of portfolio turnover (100% or more) involves correspondingly
greater expenses which must be borne by a Fund and its shareholders. See
"Financial Highlights" for a statement of the historical portfolio turnover
rate of each Fund (other than the Japanese Equity and International Small Cap
Funds). It is anticipated that the annual portfolio turnover rates of the
Japanese Equity and International Small Cap Funds will generally not exceed
75%. The portfolio turnover rate is calculated by dividing the lesser of the
dollar amount of sales or purchases of portfolio securities by the average
monthly value of a Fund's portfolio securities, excluding securities having a
maturity at the date of purchase of one year or less. The Investment Adviser
will not consider the portfolio turnover rate a limiting factor in making
investment decisions for a Fund consistent with the Fund's investment
objectives and portfolio management policies.
 
 
                                  MANAGEMENT
 
TRUSTEES AND OFFICERS
 
  The Trustees are responsible for deciding matters of general policy and
reviewing the actions of the Investment Adviser, distributor and transfer
agent. The officers of the Trust conduct and supervise each Fund's daily
business operations. The Additional Statement contains information as to the
identity of, and other information about, the Trustees and officers of the
Trust.
 
                                      31
<PAGE>
 
INVESTMENT ADVISERS
 
  INVESTMENT ADVISERS. Goldman Sachs Asset Management, One New York Plaza,
New York, New York 10004, a separate operating division of Goldman Sachs,
serves as the investment adviser to the CORE International Equity Fund.
Goldman Sachs registered as an investment adviser in 1981. Goldman Sachs Asset
Management International, 133 Peterborough Court, London EC4A 2BB, England, an
affiliate of Goldman Sachs, serves as the investment adviser to the
International Equity, Japanese Equity, International Small Cap, Emerging
Markets Equity and Asia Growth Funds. Goldman Sachs Asset Management
International became a member of the Investment Management Regulatory
Organisation Limited in 1990 and registered as an investment adviser in 1991.
The Goldman Sachs Group, L.P., which controls the Investment Advisers, has
announced that it will pursue an initial public offering of the firm during
the fourth quarter of 1998; if the public offering is consummated, The Goldman
Sachs Group, L.P. will merge into the new public company, which will be called
The Goldman Sachs Group, Inc. As of July 24, 1998, GSAM and GSAMI, together
with their affiliates, acted as investment adviser or distributor for assets
in excess of $168 billion.
 
  Under a Management Agreement with each Fund, the applicable Investment
Adviser, subject to the general supervision of the Trustees, provides day-to-
day advice as to the Fund's portfolio transactions. Goldman Sachs has agreed
to permit the Funds to use the name "Goldman Sachs" or a derivative thereof as
part of each Fund's name for as long as a Fund's Management Agreement is in
effect.
 
  In performing its investment advisory services, each Investment Adviser,
while remaining ultimately responsible for the management of the Funds, is
able to draw upon the research and expertise of its asset management
affiliates for portfolio decisions and management with respect to certain
portfolio securities. In addition, the Investment Adviser will have access to
the research of, and certain proprietary technical models developed by,
Goldman Sachs and may apply quantitative and qualitative analysis in
determining the appropriate allocations among the categories of issuers and
types of securities.
 
  Under the Management Agreement, each Investment Adviser also: (i) supervises
all non-advisory operations of each Fund; (ii) provides personnel to perform
such executive, administrative and clerical services as are reasonably
necessary to provide effective administration of each Fund; (iii) arranges for
at each Fund's expense (a) the preparation of all required tax returns, (b)
the preparation and submission of reports to existing shareholders, (c) the
periodic updating of prospectuses and Additional Statements and (d) the
preparation of reports to be filed with the SEC and other regulatory
authorities; (iv) maintains each Fund's records; and (v) provides office space
and all necessary office equipment and services.
 
 FUND MANAGERS
 
<TABLE>
<CAPTION>
                                                              YEARS
                                                              PRIMARILY
           NAME AND TITLE          FUND RESPONSIBILITY        RESPONSIBLE FIVE YEAR EMPLOYMENT HISTORY
           --------------          -------------------        ----------- ----------------------------
  <C>                              <C>                        <C>         <S>
  Anna G. Antici                   Portfolio Manager--           Since      Ms. Antici joined the
   Vice President                  Emerging Markets              1998       Investment Adviser in
                                                                            1997. From 1994 to 1997,
                                                                            she was a Vice President
                                                                            for HSBC Asset
                                                                            Management, where she
                                                                            was a portfolio manager
                                                                            for emerging markets and
                                                                            head of the Latin
                                                                            American Department. In
                                                                            1993, she was a senior
                                                                            research analyst for
                                                                            Baring Securities.
- ------------------------------------------------------------------------------------------------------
  Robert A. Beckwitt               Senior Portfolio Manager--    Since      Mr. Beckwitt joined the
   Vice President and              Emerging Markets Equity       1997       Investment Adviser in
   Co-Head Emerging Market                                                  1996. From 1986 to 1996,
   Equities                                                                 he was Chief Investment
                                                                            Strategist-Portfolio
                                                                            Adviser to high net
                                                                            worth investors at
                                                                            Fidelity Investments.
</TABLE>
 
 
                                      32
<PAGE>
 
<TABLE>
<CAPTION>
                                                  YEARS
                                                  PRIMARILY
     NAME AND TITLE    FUND RESPONSIBILITY        RESPONSIBLE FIVE YEAR EMPLOYMENT HISTORY
     --------------    -------------------        ----------- ----------------------------
  <C>                  <C>                        <C>         <S>
  Guy P. de C. Bennett Portfolio Manager--           Since      Mr. Bennett joined the
   Vice President      International Equity          1997       Investment Adviser in
                       Senior Portfolio Manager--               1996 and is also co-head
                       Japanese Equity               1998       of GSAM's Japanese
                                                                Equity Group in Tokyo.
                                                                From 1984 to 1996, he
                                                                was a portfolio manager
                                                                and an Executive
                                                                Director at CIN
                                                                Management.
- ------------------------------------------------------------------------------------------
  Melissa Brown        Senior Portfolio Manager--    Since      Ms. Brown joined the
   Vice President      CORE International Equity     1998       Investment Adviser in
                                                                1998. From 1984 to 1998,
                                                                she was the director of
                                                                Quantitative Equity
                                                                Research and served on
                                                                the Investment Policy
                                                                Committee at Prudential
                                                                Securities.
- ------------------------------------------------------------------------------------------
  Mark M. Carhart      Senior Portfolio Manager--    Since      Mr. Carhart joined the
   Vice President      CORE International Equity     1998       Investment Adviser in
                                                                1997, as a member of the
                                                                Quantative Research and
                                                                Risk Management team.
                                                                From August 1995 to
                                                                September 1997, he was
                                                                Assistant Professor of
                                                                Finance at the Marshall
                                                                School of Business at
                                                                USC and a Senior Fellow
                                                                of the Wharton Financial
                                                                Institutions Center.
- ------------------------------------------------------------------------------------------
  Kent A. Clark        Senior Portfolio Manager--    Since      Mr. Clark joined the
   Vice President      CORE International Equity     1997       Investment Adviser in
                                                                1992.
- ------------------------------------------------------------------------------------------
  Ivor H. Farman       Portfolio Manager--           Since      Mr. Farman joined the
   Executive Director  International Equity          1996       Investment Adviser in
                                                                1996. From 1995 to 1996,
                                                                he was responsible for
                                                                originating and
                                                                marketing French equity
                                                                ideas at Exane in Paris.
                                                                From 1994 to 1995 he was
                                                                engaged in French equity
                                                                research and marketing
                                                                at Banque Nationale de
                                                                Paris and Schroders in
                                                                London.
- ------------------------------------------------------------------------------------------
  Paul Greener         Portfolio Manager--           Since      Mr. Greener joined the
   Associate           CORE International Equity     1998       Investment Adviser in
                                                                1996 as a member of the
                                                                U.K. and European Equity
                                                                Team responsible for
                                                                European general
                                                                retailers, business
                                                                services and technology
                                                                sectors. Prior to
                                                                joining GSAM, he was an
                                                                equity analyst for two
                                                                years at CIN Management.
- ------------------------------------------------------------------------------------------
  James P. Hordern     Portfolio Manager--           Since      Mr. Hordern joined the
   Executive Director  International Small Cap       1998       Investment Adviser in
                                                                1997. From 1991 to 1997,
                                                                he was an Assistant
                                                                Director and portfolio
                                                                manager at Mercury Asset
                                                                Management on the
                                                                European Specialist
                                                                Team.
- ------------------------------------------------------------------------------------------
  Raymond J. Iwanowski Portfolio Manager--           Since      Mr. Iwanowski joined the
   Vice President      CORE International Equity     1988       Investment Adviser in
                                                                1998. Prior to joining
                                                                the Investment Adviser,
                                                                he spent three years at
                                                                Salomon Brothers, where
                                                                he was a Vice President
                                                                and head of the Fixed
                                                                Derivatives Client
                                                                Research group.
- ------------------------------------------------------------------------------------------
  Robert C. Jones      Senior Portfolio Manager--    Since      Mr. Jones joined the
   Managing Director   CORE International Equity     1997       Investment Adviser in
                                                                1989. From 1987 to 1989,
                                                                he was the senior
                                                                quantitative analyst in
                                                                the Goldman, Sachs & Co.
                                                                Investment Research
                                                                Department.
- ------------------------------------------------------------------------------------------
  Shigeka Kouda        Portfolio Manager--           Since      Mr. Kouda joined the
   Vice President      Japanese Equity               1998       Investment Adviser in
                                                                1997. From 1992 to 1997,
                                                                he was at the Fixed
                                                                Income Division of
                                                                Goldman Sachs (Japan)
                                                                Limited, where he was
                                                                extensively involved in
                                                                emerging markets trading
                                                                as well as International
                                                                Fixed Income
                                                                institutional sales.
</TABLE>
 
                                       33
<PAGE>
 
<TABLE>
<CAPTION>
                                                     YEARS
                                                     PRIMARILY
      NAME AND TITLE      FUND RESPONSIBILITY        RESPONSIBLE FIVE YEAR EMPLOYMENT HISTORY
      --------------      -------------------        ----------- ----------------------------
  <C>                     <C>                        <C>         <S>
  Ralf Laier              Portfolio Manager--           Since      Mr. Laier joined the
   Vice President         Emerging Markets              1998       Investment Adviser in
                                                                   1997 and is a portfolio
                                                                   manager with a focus on
                                                                   Central/Eastern European
                                                                   (CEE) and the
                                                                   Commonwealth of
                                                                   Independent States
                                                                   (CIS). Prior to joining
                                                                   the Investment Adviser,
                                                                   from 1995 to 1997, he
                                                                   was Vice President of
                                                                   Soros Global Research,
                                                                   where he analyzed
                                                                   investment opportunities
                                                                   in CEE/CIS. From 1994 to
                                                                   1995, he achieved a
                                                                   Ph.D. from the Academy
                                                                   of Economics in Pozan,
                                                                   Poland, and from 1992 to
                                                                   1994 he worked for the
                                                                   Polish Ministry of
                                                                   Privatization as a
                                                                   Project Director
                                                                   developing privatization
                                                                   strategies for several
                                                                   industry sectors.
- ---------------------------------------------------------------------------------------------
  Alice Lui               Portfolio Manager--           Since      Ms. Lui joined the
   Vice President         Asia Growth                   1994       Investment Adviser
                                                                   in 1990. Prior to 1990,
                                                                   she was a management
                                                                   consultant with Andersen
                                                                   Consulting in Hong Kong.
- ---------------------------------------------------------------------------------------------
  Shogo Maeda             Portfolio Manager--           Since      Mr. Maeda joined the
   Managing Director      International Equity          1994       Investment Adviser in
                          International Small Cap       1998       1994. From 1987 to 1994,
                          Senior Portfolio Manager--               he worked at Nomura
                          Japanese Equity               1998       Investment Management
                                                                   Incorporated as a Senior
                                                                   Portfolio Manager.
- ---------------------------------------------------------------------------------------------
  Warwick M. Negus        Senior Portfolio Manager--    Since      Mr. Negus joined the
   Managing Director and  Asia Growth                   1994       Investment Adviser in
   Co-Head Emerging       Portfolio Manager--                      1994. From 1987 to 1994,
   Market                 International Equity          1994       he was a Vice President
   Equities               Emerging Markets Equity       1997       of Bankers Trust
                          International Small Cap       1998       Australia Ltd where he
                                                                   was the Chief Investment
                                                                   Officer of their
                                                                   Southeast Asian
                                                                   investment team. He is
                                                                   also a member of Goldman
                                                                   Sachs Asset Management's
                                                                   global asset allocation
                                                                   committee.
- ---------------------------------------------------------------------------------------------
  Susan Noble             Senior Portfolio Manager--    Since      Ms. Noble joined the
   Executive Director     International Equity          1998       Investment Adviser in
                                                                   October 1997 as Senior
                                                                   Portfolio Manager and
                                                                   head of the European
                                                                   Equity team. From 1986
                                                                   to 1997, she worked at
                                                                   Fleming Investment
                                                                   Management in London,
                                                                   where she most recently
                                                                   was Portfolio Management
                                                                   Director for the
                                                                   European equity
                                                                   investment strategy and
                                                                   process.
- ---------------------------------------------------------------------------------------------
  Ebru Ozsezgin           Portfolio Manager--           Since      Ms. Ozsezgin joined the
   Vice President         Emerging Markets              1998       Investment Adviser in
                                                                   1997 and is a portfolio
                                                                   manager with a focus on
                                                                   the Mediterranean and
                                                                   Middle East region. From
                                                                   1996 to 1997, she was a
                                                                   portfolio manager at
                                                                   Foreign & Colonial,
                                                                   responsible for Middle
                                                                   East investments. From
                                                                   1994 to 1996, she was a
                                                                   fund manager with
                                                                   Framlington Investment
                                                                   Management. From 1990 to
                                                                   1994, she was a manager
                                                                   at Global Securities
                                                                   Ltd.
- ---------------------------------------------------------------------------------------------
  Victor H. Pinter        Senior Portfolio Manager--    Since      Mr. Pinter joined the
   Vice President         CORE International Equity     1997       Investment Adviser in
                                                                   1990. From 1985 to 1990,
                                                                   he was a project manager
                                                                   in the Information
                                                                   Technology Division of
                                                                   the Investment Adviser.
- ---------------------------------------------------------------------------------------------
  Ramakrishna Shankar     Portfolio Manager--           Since      Mr. Shankar joined the
   Vice President         Asia Growth                   1997       Investment Adviser in
                          Emerging Markets Equity       1998       1997. From July 1996 to
                                                                   1997, he worked for
                                                                   Goldman, Sachs & Co. in
                                                                   Singapore as a strategic
                                                                   advisor for transactions
                                                                   involving infrastructure
                                                                   industries in Asia. From
                                                                   1988 to 1996, he worked
                                                                   for Goldman, Sachs & Co.
                                                                   as an investment banker
                                                                   in the Investment
                                                                   Banking Division.
</TABLE>
 
 
                                       34
<PAGE>
 
<TABLE>
<CAPTION>
                                       YEARS
                                       PRIMARILY
   NAME AND TITLE  FUND RESPONSIBILITY RESPONSIBLE FIVE YEAR EMPLOYMENT HISTORY
   --------------  ------------------- ----------- ----------------------------
  <C>              <C>                 <C>         <S>
  Miyako Shibamoto Portfolio Manager--    Since      Ms. Shibamoto joined the
   Vice President  Japanese Equity        1998       Japanese Equity team in
                                                     March 1998. From 1993 to
                                                     1998 she was a Vice
                                                     President at Scudder
                                                     Stevens and Clark
                                                     (Japan).
- -------------------------------------------------------------------------------
  Andrew Shrimpton Portfolio Manager--    Since      Mr. Shrimpton joined the
   Vice President  Emerging Markets       1998       Investment Adviser in
                                                     1996, and is a portfolio
                                                     manager with a focus on
                                                     Africa as well as the
                                                     financial industry in
                                                     the EMEA region. Prior
                                                     to joining the
                                                     Investment Adviser,
                                                     since 1985, he was a UK
                                                     equity analyst and
                                                     portfolio manager for
                                                     CIN Management, where he
                                                     initiated CIN
                                                     Managaement's first
                                                     investments in Latin
                                                     America.
- -------------------------------------------------------------------------------
  Robert Stewart   Portfolio Manager--    Since      Mr. Stewart joined the
   Vice President  Japanese Equity        1998       Investment Adviser in
                                                     1996. From 1994 to 1996,
                                                     he was at CIN Management
                                                     as a portfolio manager
                                                     managing Japanese
                                                     equities.
- -------------------------------------------------------------------------------
  Takeya Suzuki    Portfolio Manager--    Since      Mr. Suzuki joined the
   Vice President  Japanese Equity        1998       Investment Adviser in
                                                     1996. From 1990 to 1996,
                                                     he was a Japanese equity
                                                     portfolio manager at
                                                     Nomura Investment
                                                     Management where he
                                                     actively managed assets
                                                     for U.S. pension funds.
</TABLE>
 
 
  It is the responsibility of the Investment Adviser to make the investment
decisions for a Fund and to place the purchase and sale orders for the Fund's
portfolio transactions in U.S. and foreign markets. Such orders may be
directed to any broker including, to the extent and in the manner permitted by
applicable law, Goldman Sachs or its affiliates. In effecting purchases and
sales of portfolio securities for the Funds, the Investment Adviser will seek
the best price and execution of a Fund's orders. In doing so, where two or
more brokers or dealers offer comparable prices and execution for a particular
trade, consideration may be given to whether the broker or dealer provides
investment research or brokerage services or sells Shares of any Goldman Sachs
Fund. See the Additional Statement for a further description of the Investment
Adviser's brokerage allocation practices.
 
  As compensation for its services rendered and assumption of certain expenses
pursuant to separate Management Agreements, GSAM and GSAMI are entitled to the
following fees, computed daily and payable monthly at the annual rates listed
below:
 
<TABLE>
<CAPTION>
                                                               FOR THE FISCAL
                                                CONTRACTUAL YEAR OR PERIOD ENDED
                                                   RATE*     JANUARY 31, 1998*
                                                ----------- --------------------
     <S>                                        <C>         <C>
     GSAM
     CORE International Equity.................    0.85%            0.75%
     GSAMI
     International Equity......................    1.00%            0.90%
     Japanese Equity...........................    1.00%             N/A
     International Small Cap...................    1.20%             N/A
     Emerging Markets Equity...................    1.20%            1.10%
     Asia Growth...............................    1.00%            0.86%
</TABLE>
- --------
*All numbers are annualized. The difference, if any, between the stated fees
and the actual fees paid by the Funds reflects that the applicable Investment
Adviser did not charge the full amount of the fees to which it would have been
entitled. Effective September 1, 1998, the management fee for the CORE
International Equity, International Equity, Emerging Markets Equity and Asia
Growth Funds will equal 0.85%, 1.00%, 1.20% and 1.00%, respectively.
 
                                      35
<PAGE>
 
  The Investment Adviser has voluntarily agreed to reduce or limit certain
"Other Expenses" of the Funds (excluding management, distribution and service
fees, transfer agency fees, taxes, interest and brokerage fees and litigation,
indemnification and other extraordinary expenses) to the extent such expenses
exceed 0.12%, 0.10%, 0.01%, 0.16%, 0.15% and 0.16% per annum of the average
daily net assets of the CORE International Equity, International Equity,
Japanese Equity, International Small Cap, Emerging Markets Equity and Asia
Growth Funds, respectively. Such reductions or limits, if any, may be
discontinued or modified by the applicable Investment Adviser in its
discretion at any time.
 
  ACTIVITIES OF GOLDMAN SACHS AND ITS AFFILIATES AND OTHER ACCOUNTS MANAGED BY
GOLDMAN SACHS. The involvement of the Investment Adviser, Goldman Sachs and
their affiliates in the management of, or their interest in, other accounts
and other activities of Goldman Sachs may present conflicts of interest with
respect to a Fund or limit a Fund's investment activities. Goldman Sachs and
its affiliates engage in proprietary trading and advise accounts and funds
which have investment objectives similar to those of the Funds and/or which
engage in and compete for transactions in the same types of securities,
currencies and instruments as the Funds. Goldman Sachs and its affiliates will
not have any obligation to make available any information regarding their
proprietary activities or strategies, or the activities or strategies used for
other accounts managed by them, for the benefit of the management of the
Funds. The results of a Fund's investment activities, therefore, may differ
from those of Goldman Sachs and its affiliates and it is possible that a Fund
could sustain losses during periods in which Goldman Sachs and its affiliates
and other accounts achieve significant profits on their trading for
proprietary or other accounts. In addition, the Funds may, from time to time,
enter into transactions in which other clients of Goldman Sachs have an
adverse interest. From time to time, a Fund's activities may be limited
because of regulatory restrictions applicable to Goldman Sachs and its
affiliates, and/or their internal policies designed to comply with such
restrictions. See "Management--Activities of Goldman Sachs and its Affiliates
and Other Accounts Managed by Goldman Sachs" in the Additional Statement for
further information.
 
DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs, 85 Broad Street, New York, New York 10004, serves as the
exclusive distributor (the "Distributor") of each Fund's Shares. Shares may
also be sold by Authorized Dealers. Authorized Dealers include investment
dealers that are members of the NASD and certain other financial service
firms. To become an Authorized Dealer, a dealer or financial service firm must
enter into a sales agreement with Goldman Sachs. The minimum investment
requirements, services, programs and purchase and redemption options for
Shares purchased through a particular Authorized Dealer may be different from
those available to investors purchasing through other Authorized Dealers.
 
  Goldman Sachs, 4900 Sears Tower, Chicago, Illinois 60606, also serves as
each Fund's transfer agent (the "Transfer Agent") and as such performs various
shareholder servicing functions. As compensation for the services rendered to
each Fund by Goldman Sachs (as Transfer Agent), Goldman Sachs is entitled to a
fee with respect to each Fund's Class A, Class B and Class C Shares equal, on
an annual basis, to 0.19% of the average daily net assets. Shareholders with
inquiries regarding any Fund should contact Goldman Sachs (as Transfer Agent)
at the address or the telephone number set forth on the back cover page of
this Prospectus.
 
  From time to time, Goldman Sachs or any of its affiliates may purchase and
hold Shares of the Funds. Goldman Sachs reserves the right to redeem at any
time some or all of the Shares acquired for its own account.
 
 
                                      36
<PAGE>
 
YEAR 2000
 
  Many computer systems were designed using only two digits to signify the
year (for example, "98" for "1998"). On January 1, 2000, if these computer
systems are not corrected, they may incorrectly interpret "00" as the year
"1900" rather than the year "2000," leading to computer shutdowns or errors
(commonly known as the "Year 2000 Problem"). To the extent these systems
conduct forward-looking calculations, these computer problems may occur prior
to January 1, 2000. Like other investment companies and financial and business
organizations, the Funds could be adversely affected in their ability to
process securities trades, price securities, provide shareholder account
services and otherwise conduct normal business operations if the computer
systems used by the Investment Adviser or other Fund service providers do not
adequately address this problem in a timely manner. The Investment Adviser has
established a dedicated group to analyze these issues and to implement the
systems modifications necessary to prepare for the Year 2000 Problem.
Currently, the Investment Adviser does not anticipate that the transition to
the 21st Century will have any material impact on its ability to
continue to service the Funds at current levels. In addition, the Investment
Adviser has sought assurances from the Funds' other service providers that
they are taking the steps necessary so that they do not experience Year 2000
Problems, and the Investment Adviser will continue to monitor the situation.
At this time, however, no assurance can be given that the actions taken by the
Investment Adviser and the Funds' other service providers will be sufficient
to avoid any adverse effect on the Funds due to the Year 2000 Problem.
 
 
                                   EXPENSES
 
  The Funds are responsible for the payment of their expenses. The expenses
include, without limitation: the fees payable to the Investment Adviser;
distribution and service fees; custodial and transfer agency fees; brokerage
fees and commissions; filing fees for the registration or qualification of the
Fund's Shares under federal or state securities laws; organizational expenses;
fees and expenses incurred in connection with membership in investment company
organizations; taxes; interest; costs of liability insurance, fidelity bonds
or indemnification; any costs, expenses or losses arising out of any liability
of, or claim for damages or other relief asserted against, the Funds for
violation of any law; legal and auditing fees and expenses (including the cost
of legal and certain accounting services rendered by employees of the
Investment Adviser and its affiliates with respect to the Funds); expenses of
preparing and setting in type prospectuses, Additional Statements, proxy
material, financial reports and notices and the printing and distributing of
the same to shareholders and regulatory authorities; compensation and expenses
of the Trust's "non-interested" Trustees; and extraordinary organizational
expenses, if any, incurred by the Trust.
 
 
                            REPORTS TO SHAREHOLDERS
 
  Shareholders will receive an annual report containing audited financial
statements and a semi-annual report. To eliminate unnecessary duplication,
only one copy of such reports may be sent to shareholders with the same
mailing address. Shareholders who desire a duplicate copy of such reports to
be mailed to their residence should contact Goldman Sachs at 800-526-7384.
Each shareholder will also be provided with a printed confirmation for each
transaction in the shareholder's account and an individual quarterly account
statement. A year-to-date statement for any account will be provided upon
request made to Goldman Sachs. The Funds do not generally provide sub-
accounting services.
 
                                      37
<PAGE>
 
 
                                 HOW TO INVEST
 
ALTERNATIVE PURCHASE ARRANGEMENTS
 
  Each Fund continuously offers through this Prospectus Class A, Class B and
Class C Shares, as described more fully in "How to Buy Shares of the Funds."
If you do not specify in your instructions to the Funds which Class of Shares
you wish to purchase, the Funds will assume that your instructions apply to
Class A Shares.
 
  CLASS A SHARES. If you invest less than $1 million in Class A Shares you
will pay an initial sales charge. Certain purchases may qualify for reduced
initial sales charges. If you invest $1 million or more in Class A Shares of a
Fund, no sales charge will be imposed at the time of purchase, but you may
incur a deferred sales charge equal to 1.00% if you redeem your Shares within
18 months of purchase. Class A Shares are subject to distribution and service
fees of 0.50% per annum of each Fund's average daily net assets attributable
to Class A Shares.
 
  CLASS B SHARES. Class B Shares are sold without an initial sales charge, but
are subject to a CDSC of up to 5% if redeemed within six years of purchase.
Class B Shares are subject to distribution and service fees of 1.00% per annum
of each Fund's average daily net assets attributable to Class B Shares. See
"Distribution and Service Plans." Class B Shares will automatically convert to
Class A Shares, based on their relative NAVs, eight years after the initial
purchase. Your entire investment in Class B Shares is available to work for
you from the time you make your initial investment, but the distribution and
service fee paid by Class B Shares will cause your Class B Shares (until
conversion to Class A Shares) to have a higher expense ratio and to pay lower
dividends, to the extent dividends are paid, than Class A Shares.
 
  CLASS C SHARES. Class C Shares are sold without an initial sales charge, but
are subject to a CDSC of 1% if redeemed within 12 months of purchase. Class C
Shares are subject to distribution and service fees of 1.00% per annum of each
Fund's average daily net assets attributable to Class C Shares. See
"Distribution and Service Plans." Class C Shares have no conversion feature,
and accordingly, an investor that purchases Class C Shares will be subject to
the distribution and service fee imposed on Class C Shares for an indefinite
period, subject to annual approval by the Fund's Board of Trustees and certain
regulatory limitations. Your entire investment in Class C Shares is available
to work for you from the time you make your initial investment, but the
distribution and service fee paid by Class C Shares will cause your Class C
Shares to have a higher expense ratio and to pay lower dividends, to the
extent dividends are paid, than Class A Shares (or Class B Shares after
conversion to Class A Shares).
 
  FACTORS TO CONSIDER IN CHOOSING CLASS A, CLASS B OR CLASS C SHARES. The
decision as to which Class to purchase depends on the amount you invest, the
intended length of the investment and your personal situation. For example, if
you are making an investment of $50,000 or more that qualifies for a reduced
sales charge, you should consider purchasing Class A Shares. A brief
description of when the initial sales charge may be reduced or eliminated is
set forth below under "Right of Accumulation" and "Statement of Intention." If
you prefer not to pay an initial sales charge on an investment and plan to
hold your investment for at least six years, you might consider purchasing
Class B Shares. If you prefer not to pay an initial sales charge and are
unsure of the length of your investment or plan to hold your investment for
less than eight years, you may prefer Class C Shares. There is no size limit
on the purchase of Class A Shares. A maximum purchase limitation of $250,000
and
 
                                      38
<PAGE>
 
$1,000,000 in the aggregate normally applies to purchases of Class B Shares
and Class C Shares, respectively. Although Class C Shares are subject to a
CDSC for only 12 months and at a lower rate than Class B Shares, Class C
Shares do not have the conversion feature applicable to Class B Shares, making
them subject to higher distribution and service fees for an indefinite period.
Authorized Dealers may receive different compensation for selling Class A,
Class B or Class C Shares.
 
HOW TO BUY SHARES OF THE FUNDS--CLASS A, CLASS B AND CLASS C SHARES
 
  You may purchase Shares of the Funds through any Authorized Dealer
(including Goldman Sachs) or directly from a Fund, c/o National Financial Data
Services, Inc. ("NFDS"), P.O. Box 419711, Kansas City, MO 64141-6711 on any
Business Day (as defined under "Additional Information") at the NAV next
determined after receipt of an order as described below under "Other Purchase
Information," plus, in the case of Class A Shares, any applicable sales charge.
Currently, each Fund's NAV is determined as of the close of regular trading on
the New York Stock Exchange (which is normally, but not always, 4:00 p.m. New
York time).
 
  The minimum initial investment in each Fund is $1,000. An initial investment
minimum of $250 applies to purchases in connection with tax-sheltered
retirement plans, Individual Retirement Account Plans (excluding SIMPLE IRAs
and Education IRAs) or accounts established under the Uniform Gift to Minors
Act ("UGMA"), and an initial investment minimum of $200 applies to purchases
in connection with 403(b) plans. The minimum initial investment for purchases
in connection with SIMPLE and Education IRAs, as well as purchases through the
Automatic Investment Plan, is $50. The minimum subsequent investment is $50.
These requirements may be waived at the discretion of the Trust's officers.
 
  You may pay for purchases of Shares by check (except that the Trust will not
accept a check drawn on a foreign bank or a third party check), Federal
Reserve draft, federal funds wire, ACH transfer or bank wire. Purchases of
Shares by check or Federal Reserve draft should be made payable as follows:
(i) to an investor's Authorized Dealer, if purchased through such Authorized
Dealer; or (ii) to Goldman Sachs International Equity Funds--(Name of Fund and
Class of Shares) and sent to NFDS, P.O. Box 419711, Kansas City, MO 64141-
6711. Federal funds wires, ACH transfers and bank wires should be sent to
State Street Bank and Trust Company ("State Street"). Payment must be received
within three Business Days after receipt of the purchase order. An investor's
Authorized Dealer is responsible for forwarding payment promptly to the Fund.
 
  In order to make an initial investment in a Fund, an investor must establish
an account with the Fund by furnishing to the Fund, Goldman Sachs or the
investor's Authorized Dealer the information in the Account Application
attached to this Prospectus. The Funds may refuse to open an account for any
investor who fails to (i) provide a social security number or other taxpayer
identification number; or (ii) certify that such number is correct (if
required to do so under applicable law).
 
  The Funds reserve the right to redeem Shares of any shareholder whose
account balance is less than $50 as a result of earlier redemptions. Such
redemptions will not be implemented if the value of a shareholder's account
falls below the minimum account balance solely as a result of market
conditions. A Fund will give 60 days' prior written notice to shareholders
whose Shares are being redeemed to allow them to purchase sufficient
additional Shares of the Fund to avoid such redemption. In addition, the Funds
and Goldman Sachs reserve the right to modify the minimum investment, the
manner in which Shares are offered and the sales charge rates applicable to
future purchases of Shares.
 
                                      39
<PAGE>
 
OFFERING PRICE--CLASS A SHARES
 
  The offering price of Class A Shares of each Fund is the next determined NAV
per Share plus a sales charge, if any, paid to Goldman Sachs at the time of
purchase of Shares as shown in the following table:
 
<TABLE>
<CAPTION>
                                                                 SALES CHARGE   MAXIMUM DEALER
                                                 SALES CHARGE AS AS PERCENTAGE   ALLOWANCE AS
       AMOUNT OF PURCHASE                         PERCENTAGE OF  OF NET AMOUNT   PERCENTAGE OF
 INCLUDING SALES CHARGE, IF ANY)(                OFFERING PRICE    INVESTED    OFFERING PRICE***
- --------------------------------                 --------------- ------------- -----------------
 <S>                                             <C>             <C>           <C>
 Less than $50,000..............................      5.50%          5.82%           5.00%
 $50,000 up to (but less than) $100,000.........      4.75           4.99            4.00
 $100,000 up to (but less than) $250,000........      3.75           3.90            3.00
 $250,000 up to (but less than) $500,000........      2.75           2.83            2.25
 $500,000 up to (but less than) $1 million......      2.00           2.04            1.75
 $1 million or more.............................      0.00*          0.00*            **
</TABLE>
- --------
  * No sales charge is payable at the time of purchase of Class A Shares of $1
    million or more, but a CDSC may be imposed in the event of certain
    redemption transactions made within 18 months of purchase.
 
 ** Goldman Sachs pays a one-time commission to Authorized Dealers who
    initiate or are responsible for purchases of $1 million or more of Shares
    of the Funds equal to 1.00% of the amount under $3 million, 0.50% of the
    next $2 million, and 0.25% thereafter. Goldman Sachs may also pay, with
    respect to all or a portion of the amount purchased, a commission in
    accordance with the foregoing schedule to Authorized Dealers who initiate
    or are responsible for plans investing in the Funds which satisfy the
    criteria set forth in (h) below or "wrap" accounts purchasing $1 million
    or more which satisfy the criteria set forth in (i) below. Purchases by
    such plans will be made at NAV with no initial sales charge, but if all of
    the Shares held are redeemed within 18 months after the end of the
    calendar month in which such purchase was made, a CDSC, as described
    below, of 1.00% may be imposed upon the plan sponsor or the third party
    administrator. In addition, Authorized Dealers shall remit to Goldman
    Sachs such payments received in connection with "wrap" accounts in the
    event that Shares are redeemed within 18 months after the end of the
    calendar month in which the purchase was made.
 
*** During special promotions, the entire sales charge may be reallowed to
    Authorized Dealers. Authorized Dealers to whom substantially the entire
    sales charge is reallowed may be deemed to be "underwriters" under the
    Securities Act of 1933.
 
  Purchases of $1 million or more of Class A Shares will be made at NAV with
no initial sales charge, but if the Shares are redeemed within 18 months after
the end of the calendar month in which the purchase was made, excluding any
period of time in which the Shares were exchanged into and remained invested
in an ILA Portfolio (the "CDSC period"), a CDSC of 1.00% may be imposed
unless, in certain cases, the investor's Authorized Dealer enters into an
agreement with Goldman Sachs to return all or an applicable prorated portion
of its commission to Goldman Sachs. Any applicable CDSC will be assessed on an
amount equal to the lesser of the current market value or the original
purchase cost of the redeemed Class A Shares. Accordingly, no CDSC will be
imposed on increases in account value above the initial purchase price,
including any dividend or capital gains distributions which have been
reinvested in additional Class A Shares. Upon redemption of shares subject to
a CDSC, shareholders will receive that portion of the appreciation in account
value attributable to the Shares actually redeemed. In determining whether a
CDSC applies to a redemption, it will be assumed that the redemption is first
made from any Class A Shares in your account that are not subject to the CDSC.
The CDSC is waived on redemptions in certain circumstances. See "Waiver or
Reduction of Contingent Deferred Sales Charges" below.
 
                                      40
<PAGE>
 
  Class A Shares of the Funds may be sold at NAV without payment of any sales
charge to: (a) Goldman Sachs, its affiliates or their respective officers,
partners, directors or employees (including retired employees and former
partners), any partnership of which Goldman Sachs is a general partner, any
Trustee or officer of the Trust and designated family members of any of the
above individuals; (b) qualified retirement plans of Goldman Sachs; (c)
trustees or directors of investment companies for which Goldman Sachs or an
affiliate acts as sponsor; (d) any employee or registered representative of
any Authorized Dealer or their respective spouses, children and parents; (e)
banks, trust companies or other types of depository institutions investing for
their own account or investing for accounts for which they have investment
discretion; (f) banks, trust companies or other types of depository
institutions investing for accounts for which they do not have investment
discretion; (g) any state, county or city, or any instrumentality, department,
authority or agency thereof, which is prohibited by applicable investment laws
from paying a sales charge or commission in connection with the purchase of
Shares of a Fund; (h) pension and profit sharing plans, pension funds and
other company-sponsored benefit plans that (1) buys Shares costing $500,000 or
more, or (2) have at the time of purchase, 100 or more eligible participants,
or (3) certify that they project to have annual plan purchases of $200,000 or
more, or (4) are provided administrative services by certain third-party
administrators that have entered into a special service arrangement with
Goldman Sachs relating to such plan; (i) "wrap" accounts for the benefit of
clients of broker-dealers, financial institutions or financial planners,
provided that they have entered into an agreement with GSAM specifying
aggregate minimums and certain operating policies and standards; (j)
registered investment advisers investing for accounts for which they receive
asset-based fees; (k) accounts over which GSAM or its advisory affiliates have
investment discretion; and (l) shareholders receiving distributions from a
qualified retirement plan invested in the Goldman Sachs Funds and reinvesting
such proceeds in a Goldman Sachs IRA. Purchasers must certify eligibility for
an exemption on the Account Application and notify Goldman Sachs if the
shareholder is no longer eligible for an exemption. Exemptions will be granted
subject to confirmation of a purchaser's entitlement. Investors purchasing
Shares of the Funds at NAV without payment of any initial sales charge may be
charged a fee if they effect transactions in Shares through a broker or agent.
In addition, under certain circumstances, dividends and distributions from any
of the Goldman Sachs Funds may be reinvested in Shares of each Fund at NAV, as
described under "Cross-Reinvestment of Dividends and Distributions and
Automatic Exchange Program."
 
RIGHT OF ACCUMULATION--CLASS A SHARES
 
  Class A purchasers may qualify for reduced sales charges when the current
market value of holdings (Shares at current offering price), plus new
purchases, reaches $50,000 or more. Class A Shares of the Goldman Sachs Funds
may be combined under the Right of Accumulation. See the Additional Statement
for more information about the Right of Accumulation.
 
STATEMENT OF INTENTION--CLASS A SHARES
 
  Purchases of $50,000 or more made over a 13-month period are eligible for
reduced sales charges. Class A Shares of the Goldman Sachs Funds may be
combined under the Statement of Intention. See the Additional Statement for
more information about the Statement of Intention.
 
OFFERING PRICE--CLASS B SHARES
 
  Investors may purchase Class B Shares of a Fund at the next determined NAV
without the imposition of an initial sales charge. However, Class B Shares
redeemed within six years of purchase will be subject to a CDSC at the rates
shown in the table that follows. At redemption, the charge will be assessed on
the amount equal to the lesser of the current market value or the original
purchase cost of the Shares being redeemed. No CDSC will
 
                                      41
<PAGE>
 
be imposed on increases in account value above the initial purchase price,
including Shares derived from the reinvestment of dividends or capital gains
distributions. Upon redemption of Shares subject to a CDSC, shareholders will
receive that portion of the appreciation in account value attributable to the
Shares actually redeemed.
 
  The amount of the CDSC, if any, will vary depending on the number of years
from the time of purchase until the time of redemption of Class B Shares. For
the purpose of determining the number of years from the time of any purchase,
all payments during a month will be aggregated and deemed to have been made on
the first day of that month. In processing redemptions of Class B Shares, the
Funds will first redeem shares not subject to any CDSC, and then Shares held
longest during the applicable period.
 
<TABLE>
<CAPTION>
                                                                 CDSC AS A
                                                                 PERCENTAGE OF
   YEAR SINCE                                                    DOLLAR AMOUNT
   PURCHASE                                                      SUBJECT TO CDSC
   ----------                                                    ---------------
   <S>                                                           <C>
   First........................................................      5.0%
   Second.......................................................      4.0%
   Third........................................................      3.0%
   Fourth.......................................................      3.0%
   Fifth........................................................      2.0%
   Sixth........................................................      1.0%
   Seventh and thereafter.......................................      none
</TABLE>
 
  Proceeds from the CDSC are payable to the Distributor and may be used in
whole or part to defray the Distributor's expenses related to providing
distribution-related services to the Funds in connection with the sale of
Class B Shares, including the payment of compensation to Authorized Dealers. A
commission equal to 4.00% of the amount invested is paid to Authorized
Dealers.
 
  Class B Shares of a Fund will automatically convert into Class A Shares of
the same Fund at the end of the calendar quarter that is eight years after the
purchase date, except as noted below. Class B Shares of a Fund acquired by
exchange from Class B Shares of another Goldman Sachs Fund will convert into
Class A Shares of such Fund based on the date of the initial purchase. Class B
Shares acquired through reinvestment of distributions will convert into Class
A Shares based on the date of the initial purchase of the Shares on which the
distribution was paid. The conversion of Class B Shares to Class A Shares will
not occur at any time the Funds are advised that such conversions may
constitute taxable events for federal tax purposes, which the Funds believe is
unlikely. If conversions do not occur as a result of possible taxability,
Class B Shares would continue to be subject to higher expenses than Class A
Shares for an indeterminate period.
 
OFFERING PRICE--CLASS C SHARES
 
  Investors may purchase Class C Shares of a Fund at the next determined NAV
without the imposition of an initial sales charge. However, if Class C Shares
are redeemed within 12 months of purchase, a CDSC of 1% will be deducted from
the redemption proceeds. At redemption, the charge will be assessed on the
amount equal to the lesser of the current market value or the original
purchase cost of the Shares being redeemed. No CDSC will be imposed on
increases in account value above the initial purchase price, including Shares
derived from the reinvestment of dividends or capital gains distributions.
Upon redemption of Shares subject to a CDSC, shareholders will receive that
portion of the appreciation in account value attributable to the Shares
actually redeemed.
 
                                      42
<PAGE>
 
  For the purpose of determining the number of months from the time of any
purchase, all payments during a month will be aggregated and deemed to have
been made on the first day of that month. In processing redemptions of Class C
Shares, the Funds will first redeem Shares held for longer than 12 months, and
then Shares held for the longest period during the 12 month period. Proceeds
from the CDSC are payable to the Distributor and may be used in whole or in
part to defray the Distributor's expenses related to providing distribution-
related services to the Funds in connection with the sale of Class C Shares,
including the payment of compensation to Authorized Dealers. An amount equal
to 1.00% of the amount invested is paid by the Distributor to Authorized
Dealers.
 
REINVESTMENT OF REDEMPTION PROCEEDS--CLASS A, CLASS B AND CLASS C SHARES
 
  A shareholder who redeems Class A or Class B Shares of a Fund may reinvest
at NAV any portion or all of the redemption proceeds (plus that amount
necessary to acquire a fractional Share to round off the purchase to the
nearest full Share) in Class A Shares of the same Fund or any other Goldman
Sachs Fund. A shareholder who redeems Class C Shares of a Fund may reinvest at
NAV any portion or all of the redemption proceeds (plus that amount necessary
to acquire a fractional Share to round off the purchase to the nearest full
Share) in Class C Shares of the same Fund or any other Goldman Sachs Fund.
Shareholders should obtain and read the applicable prospectuses of such other
funds and consider their objectives, policies and applicable fees before
investing in any of such funds. This reinvestment privilege is subject to the
condition that the shares redeemed have been held for at least 30 days before
the redemption and that the reinvestment is effected within 90 days after such
redemption. If you redeemed Class A or Class C Shares, paid a CDSC upon a
redemption and reinvest in Class A or Class C Shares subject to the conditions
set forth above, your account will be credited with the amount of the CDSC
previously charged, and the reinvested Shares will continue to be subject to a
CDSC. In this case, the holding period of the Class A or Class C Shares
acquired through reinvestment for purposes of computing the CDSC payable upon
a subsequent redemption will include the holding period of the redeemed
Shares. If you redeemed Class B Shares and paid a CDSC upon redemption, you
are permitted to reinvest the redemption proceeds in Class A Shares at NAV as
described above, but the amount of the CDSC paid upon redemption will not be
credited to your account.
 
  A reinvesting shareholder may be subject to tax as a result of such
redemption. If the redemption occurs within 90 days after the original
purchase of Class A Shares, any sales charge paid on the original purchase
cannot be taken into account by a reinvesting shareholder to the extent an
otherwise applicable sales charge is not imposed pursuant to the reinvestment
privilege for purposes of determining gain or loss, if any, realized on the
redemption, but instead will be added to the tax basis of the Class A Shares
received in the reinvestment. To the extent that any loss is realized and
Shares of the same Fund are purchased within 30 days before or after the
redemption, some or all of the loss may not be allowed as a deduction
depending upon the number of shares purchased. Shareholders should consult
their own tax advisers concerning the tax consequences of a redemption and
reinvestment. Upon receipt of a written request, the reinvestment privilege
may be exercised once annually by a shareholder, except that there is no such
time limit as to the availability of this privilege in connection with
transactions the sole purpose of which is to reinvest the proceeds at NAV in a
tax-sheltered retirement plan.
 
WAIVER OR REDUCTION OF CONTINGENT DEFERRED SALES CHARGE--CLASS A, B AND C
SHARES
 
  The CDSC on Class B Shares, Class C Shares and Class A Shares that are
subject to a CDSC may be waived or reduced if the redemption relates to: (a)
retirement distributions or loans to participants or beneficiaries from
pension and profit sharing plans, pension funds and other company-sponsored
benefit plans (each a "Plan"); (b) the death or disability (as defined in
Section 72(m)(7) of the Code) of a participant or beneficiary
 
                                      43
<PAGE>
 
in a Plan; (c) hardship withdrawals by a participant or beneficiary in a Plan;
(d) satisfying the minimum distribution requirements of the Code; (e) the
establishment of "substantially equal periodic payments" as described in
Section 72(t)(2) of the Code; (f) the separation from service by a participant
or beneficiary in a Plan; (g) the death or disability (as defined in Section
72(m)(7) of the Code) of a shareholder if the redemption is made within one
year of such event; (h) excess contributions being distributed from a Plan;
(i) distributions from a qualified retirement plan invested in the Goldman
Sachs Funds which are being rolled over to a Goldman Sachs IRA; and (j)
redemption proceeds which are to be reinvested in accounts or non-registered
products over which GSAM or its advisory affiliates have investment
discretion. In addition, Class A, Class B and Class C Shares subject to a
Systematic Withdrawal Plan may be redeemed without a CDSC. However, Goldman
Sachs reserves the right to limit such redemptions, on an annual basis, to 12%
each of the value of your Class B and Class C Shares and 10% of the value of
your Class A Shares.
 
 
                      SERVICES AVAILABLE TO SHAREHOLDERS
 
AUTOMATIC INVESTMENT PLAN
 
  Systematic cash investments may be made through a shareholder's bank via the
Automated Clearing House Network or a shareholder's checking account via bank
draft each month. Required forms are available from Goldman Sachs or any
Authorized Dealer.
 
CROSS-REINVESTMENT OF DIVIDENDS AND DISTRIBUTIONS AND AUTOMATIC EXCHANGE
PROGRAM
 
  A shareholder may elect to cross-reinvest dividends and capital gain
distributions paid by a Fund in Shares of the same Class or an equivalent
class of other Goldman Sachs Funds or ILA Portfolios. See "Fund Highlights." A
shareholder may also elect to exchange automatically a specified dollar amount
of Shares of a Fund for Shares of the same Class or an equivalent class of any
other Goldman Sachs Fund or ILA Portfolio. Shares acquired through cross-
reinvestment of dividends or the automatic exchange program will be purchased
at NAV and will not be subject to any initial sales charge or CDSC as a result
of the cross-reinvestment or exchange, but Shares subject to a CDSC acquired
under the automatic exchange program may be subject to a CDSC at the time of
redemption from the fund into which the exchange is made determined on the
basis of the date and value of the investor's initial purchase of the fund
from which the exchange (or any prior exchange) is made. Automatic exchanges
are made monthly on the 15th day of each month or the first Business Day
thereafter. The minimum dollar amount for automatic exchanges must be at least
$50 per month. Cross-reinvestments and automatic exchanges are subject to the
following conditions: (i) the value of the shareholder's account(s) in the
fund which is paying the dividend or from which the automatic exchange is
being made must equal or exceed $5,000; and (ii) the value of the account in
the acquired fund must equal or exceed the acquired fund's minimum initial
investment requirement or the shareholder must elect to continue cross-
reinvestment or automatic exchanges until the value of acquired Fund Shares in
the shareholder's account equals or exceeds the acquired fund's minimum
initial investment requirement. A Fund shareholder may elect cross-
reinvestment into an identical account or an account registered in a different
name or with a different address, social security or other taxpayer
identification number, provided that the account in the acquired fund has been
established, appropriate signatures have been obtained and the minimum initial
investment requirement has been satisfied. A Fund shareholder should obtain
and read the prospectus of the fund into which dividends are invested or
automatic exchanges are made.
 
                                      44
<PAGE>
 
TAX-SHELTERED RETIREMENT PLANS
 
  The Funds offer their Shares for purchase by retirement plans, including
traditional and Roth IRAs for individuals and their spouses, IRA plans for
employees in connection with employer sponsored SEP, SAR-SEP and SIMPLE IRA
plans, 403(b) plans and defined contribution plans such as 401(k) Salary
Reduction Plans. Detailed information concerning these plans may be obtained
from the Transfer Agent. This information should be read carefully, and
consultation with an attorney or tax adviser may be advisable. The information
sets forth the service fee charged for retirement plans and describes the
federal income tax consequences of establishing a plan.
 
EXCHANGE PRIVILEGE
 
  Shares of a Fund may be exchanged at NAV without the imposition of an
initial sales charge or CDSC at the time of exchange for Shares of the same
Class or an equivalent class of any other Fund, Goldman Sachs Fund or ILA
Portfolio. A shareholder needs to obtain and read the prospectus of the fund
into which the exchange is made. The Shares of these other funds acquired by
an exchange may later be exchanged for Shares of the same Class (or an
equivalent Class) of the original Fund at the next determined NAV without the
imposition of an initial sales charge or CDSC if the dollar amount in the Fund
resulting from such exchanges is below the shareholder's all-time highest
dollar amount on which it has previously paid the applicable sales charge.
Shares of these other funds purchased through dividends and/or capital gains
reinvestment may be exchanged for Shares of the Funds without a sales charge.
In addition to free automatic exchanges pursuant to the Automatic Exchange
Program, six free exchanges are permitted in each 12 month period. A fee of
$12.50 may be charged for each subsequent exchange during such period. The
exchange privilege may be materially modified or withdrawn at any time upon 60
days' notice to shareholders and is subject to certain limitations.
 
  An exchange of Shares subject to a CDSC will not be subject to the
applicable CDSC at the time of exchange. Shares subject to a CDSC acquired in
an exchange will be subject to the CDSC of the Shares originally held. For
purposes of determining the amount of any applicable CDSC, the length of time
a shareholder has owned Shares will be measured from the date the shareholder
acquired the original Shares subject to a CDSC and will not be affected by any
subsequent exchange.
 
  An exchange may be made by identifying the applicable Fund and Class of
Shares and either writing to Goldman Sachs, Attention: Goldman Sachs
International Equity Funds, Shareholder Services, c/o NFDS, P.O. Box 419711,
Kansas City, MO 64141-6711 or, unless the investor has specifically declined
telephone exchange privileges on the Account Application or elected in writing
not to utilize telephone exchanges, by a telephone request to the Transfer
Agent at 800-526-7384 (7:00 a.m. to 3:00 p.m. Chicago time). Certain
procedures are employed to prevent unauthorized or fraudulent exchange
requests as set forth under "How to Sell Shares of the Funds." Under the
telephone exchange privilege, Shares may be exchanged among accounts with
different names, addresses and social security or other taxpayer
identification numbers only if the exchange instructions are in writing and
received in accordance with the procedures set forth under "How to Sell Shares
of the Funds." In times of drastic economic or market changes the telephone
exchange privilege may be difficult to implement.
 
  For federal income tax purposes, an exchange, including an automatic
exchange, is treated as a redemption of the Shares surrendered in the
exchange, on which an investor may be subject to tax, followed by a purchase
of Shares received in the exchange. If such redemption occurs within 90 days
after the purchase of such Shares, to the extent a sales charge that would
otherwise apply to the Shares received in the exchange is not imposed, the
sales charge paid on such purchase of Class A Shares cannot be taken into
account by the exchanging
 
                                      45
<PAGE>
 
shareholder for purposes of determining gain or loss, if any, realized on such
redemption for federal income tax purposes, but instead will be added to the
tax basis of the Shares received in the exchange. Shareholders should consult
their own tax advisers concerning the tax consequences of an exchange.
 
  Eligible investors may exchange certain classes of shares for another class
of shares of the same Fund. For further information contact Goldman Sachs at
the number set forth on the back of the Prospectus.
 
  All exchanges which represent an initial investment in a Fund must satisfy
the minimum investment requirements of the Fund into which the Shares are
being exchanged. Exchanges are available only in states where exchanges may
legally be made.
 
OTHER PURCHASE INFORMATION
 
  Authorized Dealers and other financial intermediaries may be authorized to
accept, on the Trust's behalf, purchase, redemption and exchange orders placed
by or on behalf of their customers and, if approved by the Trust, to designate
other intermediaries to accept such orders. In these cases, a Fund will be
deemed to have received an order that is in proper form when the order is
accepted by an Authorized Dealer or intermediary on a Business Day, and the
order will be priced at a Fund's NAV per Share (adjusted for any applicable
sales charge) next determined after such acceptance. Otherwise, a Fund or
Goldman Sachs must receive an order in proper form before it is effective.
Authorized Dealers and intermediaries will be responsible for transmitting
accepted orders to the Funds within the period agreed upon by them. Customers
should contact their Authorized Dealers or intermediaries to learn whether
they are authorized to accept orders for the Trust.
 
  Authorized Dealers and other financial intermediaries provide varying
arrangements for their clients to purchase and redeem Fund Shares. Some may
establish higher minimum investment requirements and others may limit the
availability of certain privileges with respect to the purchase and redemption
of Shares or the reinvestment of dividends. Firms may arrange with their
clients for other investment or administrative services and may independently
establish and charge additional fees not described in this Prospectus to their
clients for such services. If Shares of a Fund are held in a "street name"
account or were purchased through an Authorized Dealer, shareholders should
contact the Authorized Dealer to purchase, redeem or exchange Shares, to make
changes in or give instructions concerning the account or to obtain
information about the account.
 
  The Funds and Goldman Sachs each reserves the right to reject any specific
purchase order (including exchanges) or to restrict purchases or exchanges by
a particular purchaser (or group of related purchasers). This may occur, for
example, when a purchaser or a group of purchasers' pattern of frequent
purchases, sales or exchanges of Shares of a Fund is evident, or if purchases,
sales or exchanges are, or a subsequent abrupt redemption might be, of a size
that would disrupt management of a Fund.
 
  In the sole discretion of Goldman Sachs, a Fund may accept securities
instead of cash for the purchase of Shares of the Fund. Such purchases will be
permitted only if the Investment Adviser determines that any securities
acquired in this manner are consistent with the Fund's investment objectives,
restrictions and policies and are desirable investments for the Fund.
 
  The Investment Adviser, Distributor, and/or their affiliates also pay
additional compensation, from time to time, out of their assets and not as an
additional charge to the Funds, to selected Authorized Dealers and other
persons in connection with the sale, distribution and/or servicing of Shares
of the Funds and other Goldman Sachs Funds (such as additional payments based
on new sales, amounts exceeding pre-established thresholds, or
 
                                      46
<PAGE>
 
the length of time their customers' assets have remained in a Fund) and,
subject to applicable NASD regulations, contribute to various non-cash and
cash incentive arrangements to promote the sale of Shares, as well as sponsor
various educational programs, sales contests and/or promotions in which
participants may receive reimbursement of expenses, entertainment and prizes
such as travel awards, merchandise, cash, investment research and educational
information and related support materials. This additional compensation can
vary among Authorized Dealers depending upon such factors as the amounts their
customers have invested (or may invest) in particular Goldman Sachs Funds, the
particular program involved, or the amount of reimbursable expenses.
Additional compensation based on sales may, but is currently not expected to,
exceed 0.50% (annualized) of the amount invested. For further information, see
"Other Information Regarding Purchases, Redemptions, Exchanges and Dividends"
in the Additional Statement.
 
 
                        DISTRIBUTION AND SERVICE PLANS
 
  The Trust has adopted distribution and service plans on behalf of the Funds'
Class A, Class B and Class C Shares (each a "Plan"). Under the Plans, Goldman
Sachs is entitled to a monthly fee from each Fund for distribution services
equal, on an annual basis, to 0.25%, 0.75% and 0.75%, respectively, of a
Fund's average daily net assets attributable to Class A, Class B and Class C
Shares, respectively.
 
  Goldman Sachs may use this distribution fee for its expenses of distributing
Class A, Class B and Class C Shares of the Funds. The types of expenses for
which Goldman Sachs may be compensated for distribution services under the
Plans include: compensation paid to and expenses incurred by Authorized
Dealers, Goldman Sachs and their respective officers, employees and sales
representatives; commissions paid to Authorized Dealers; allocable overhead;
telephone and travel expenses; interest expenses and other costs associated
with the financing of such compensation and expenses; the printing of
prospectuses for prospective shareholders; preparation and distribution of
sales literature and advertising of any type; and all other expenses incurred
in connection with activities primarily intended to result in the sale of
Class A, Class B and Class C Shares. The aggregate compensation that may be
received under the Plans for distribution services may not exceed the
limitations imposed by the NASD's Conduct Rules. Payments for distribution
services are also subject to the requirements of Rule 12b-1 under the Act.
 
  Under the Plans, Goldman Sachs is also entitled to receive a separate fee
equal on an annual basis to 0.25% of each Fund's average daily net assets
attributable to Class A, Class B or Class C Shares. This fee is for personal
and account maintenance services, and may be used to make payments to Goldman
Sachs, Authorized Dealers and their officers, sales representatives and
employees for responding to inquires of, and furnishing assistance to,
shareholders regarding ownership of their Shares or their accounts or similar
services not otherwise provided on behalf of the Funds. If the fees received
by Goldman Sachs pursuant to the Plans exceed its expenses, Goldman Sachs may
realize a profit from these arrangements. The Plans will be reviewed and are
subject to approval annually by the Trustees.
 
  In connection with the sale of Class C Shares, Goldman Sachs begins paying
the 0.75% distribution fee as an ongoing commission, and the 0.25% ongoing
service fee, to Authorized Dealers after the Shares have been held for one
year. All of these fees are paid by Goldman Sachs on a quarterly basis.
 
                                      47
<PAGE>
 
 
                        HOW TO SELL SHARES OF THE FUNDS
 
  Each Fund will redeem its Shares upon request of a shareholder on any
Business Day at the NAV next determined after the receipt of such request in
proper form, subject to any applicable CDSC. See "Net Asset Value." Redemption
proceeds will normally be mailed by check to a shareholder within three
Business Days of receipt of a properly executed request. If the Shares to be
redeemed were recently purchased by check, a Fund may delay transmittal of
redemption proceeds until such time as it has assured itself that good funds
have been collected for the purchase of such Shares. This may take up to 15
days. Redemption requests may be made by writing to or calling the Transfer
Agent at the address or telephone number set forth on the back cover page of
this Prospectus or an Authorized Dealer.
 
  The Trust accepts telephone requests for redemption of Shares for amounts up
to $50,000 within any seven calendar day period, except for investors who have
specifically declined telephone redemption privileges on the Account
Application or elected in writing not to utilize telephone redemptions
(proceeds which are sent to a Goldman Sachs brokerage account are not subject
to the $50,000 limit). It may be difficult to implement redemptions by
telephone in times of drastic economic or market changes. By completing an
Account Application, an investor agrees that the Trust, the Distributor and
the Transfer Agent shall not be liable for any loss incurred by the investor
by reason of the Trust accepting unauthorized telephone redemption requests if
the Trust reasonably believes the instructions to be genuine. Thus,
shareholders risk possible losses in the event of a telephone redemption not
authorized by them. The Trust may accept telephone redemption instructions
from any person identifying himself or herself as the owner of an account or
the owner's broker where the owner has not declined in writing to utilize this
service.
 
  In an effort to prevent unauthorized or fraudulent redemption and exchange
requests by telephone, Goldman Sachs and NFDS each employ reasonable
procedures specified by the Trust to confirm that such instructions are
genuine. Consequently, proceeds of telephone redemption requests will be sent
only to the shareholder's address of record or authorized bank account
designated in the Account Application and exchanges of Shares will be made
only to an identical account. Telephone requests will also be recorded. The
Trust may implement other procedures from time to time concerning telephone
redemptions and exchanges. If reasonable procedures are not employed, the
Trust may be liable for any loss due to unauthorized or fraudulent
transactions. Proceeds of telephone redemptions will be mailed to the
shareholder's address of record or wired to the authorized bank account
indicated on the Account Application, unless the shareholder provides written
instructions (accompanied by a signature guarantee) indicating another
address. Telephone redemptions will not be accepted during the 30-day period
following any change in a shareholder's address of record. This redemption
option does not apply to shares held in a "street name" account. Shareholders
whose accounts are held in "street name" should contact their broker of record
who may effect telephone redemptions on their behalf. The Trust reserves the
right to terminate or modify the telephone redemption service at any time.
 
  Written requests for redemptions must be signed by each shareholder with its
signature guaranteed by a bank, a securities broker or dealer, a credit union
having authority to issue signature guarantees, a savings and loan
association, a building and loan association, a cooperative bank, a federal
savings bank or association, a national securities exchange, a registered
securities association or a clearing agency, provided that such institution
satisfies the standards established by the Transfer Agent.
 
                                      48
<PAGE>
 
  The Funds will also arrange for the proceeds of redemptions effected by any
means to be wired as federal funds to the bank account designated in the
shareholder's Account Application. Redemption proceeds will normally be wired
on the next Business Day in federal funds (for a total of one Business Day
delay) following receipt of a properly executed wire transfer redemption
request. Wiring of redemption proceeds may be delayed one additional Business
Day if the Federal Reserve Bank is closed on the day redemption proceeds would
ordinarily be wired. A transaction fee of $7.50 may be charged for payments of
redemption proceeds by wire. In order to change the bank designated on the
Account Application to receive redemption proceeds, a written request must be
received by the Transfer Agent. This request must be signature guaranteed as
set forth above. Further documentation may be required for executors, trustees
or corporations. Once wire transfer instructions have been given by Goldman
Sachs or an Authorized Dealer, neither a Fund, the Trust, Goldman Sachs nor
any Authorized Dealer assumes any further responsibility for the performance
of intermediaries or the shareholder's bank in the transfer process. If a
problem with such performance arises, the shareholder should deal directly
with such intermediaries or bank.
 
  Additional documentation regarding a redemption by any means may be required
to effect a redemption when deemed appropriate by the Transfer Agent. The
request for such redemption will not be considered to have been received in
proper form until such additional documentation has been received.
 
SYSTEMATIC WITHDRAWAL PLAN
 
  A shareholder may draw on shareholdings systematically via check or ACH in
any amount specified by the shareholder over $50. Checks are only available on
or about the 25th of each month. Each systematic withdrawal is a redemption
and therefore a taxable transaction. A minimum balance of $5,000 in Shares of
a Fund is required. The maintenance of a withdrawal plan concurrently with
purchases of additional Class A, Class B or Class C Shares would be
disadvantageous because of the sales charge imposed on your purchases of Class
A Shares or the imposition of a CDSC on your redemptions of Class A, Class B
or Class C Shares. The CDSC applicable to Class A, Class B or Class C Shares
redeemed under a systematic withdrawal plan may be waived. See "How to
Invest--Waiver or Reduction of Contingent Deferred Sales Charge." See the
Additional Statement for more information about the Systematic Withdrawal
Plan.
 
 
                                   DIVIDENDS
 
  Each dividend from net investment income and capital gains distributions, if
any, declared by a Fund on its outstanding Shares will, at the election of
each shareholder, be paid in (i) cash; (ii) additional Shares of the same
Class of the Fund or (iii) Shares of the same or an equivalent class of other
Goldman Sachs Funds or units of the ILA Portfolios (the Prime Obligations
Portfolio only for Class B and Class C), as described under "Cross-
Reinvestment of Dividends and Distributions and Automatic Exchange Program."
This election should initially be made on a shareholder's Account Application
and may be changed upon written notice to Goldman Sachs at any time prior to
the record date for a particular dividend or distribution. If no election is
made, all dividends from net investment income and capital gain distributions
will be reinvested in the applicable Fund.
 
  The election to reinvest dividends and distributions paid by a Fund in
additional Shares or units of the Fund or another Goldman Sachs Fund or ILA
Portfolio will not affect the tax treatment of such dividends and
distributions, which will be treated as received by the shareholder and then
used to purchase Shares or units of the Fund, another Goldman Sachs Fund or an
ILA Portfolio.
 
                                      49
<PAGE>
 
  Each Fund intends that all or substantially all of its net investment income
and net realized capital gains, after reduction by available capital losses,
including any capital losses carried forward from prior years, will be
declared as dividends for each taxable year. Each Fund will pay dividends at
least annually. Each Fund will pay dividends from net investment income, and
dividends from net realized capital gains, reduced by available capital
losses, at least annually. From time to time, a portion of a Fund's dividends
may constitute a return of capital.
 
  At the time of an investor's purchase of Shares of a Fund, a portion of the
NAV per Share may be represented by undistributed income of the Fund or
realized or unrealized appreciation of the Fund's portfolio securities.
Therefore, subsequent distributions on such Shares from such income or
realized appreciation may be taxable to the investor even if the NAV of the
investor's Shares is, as a result of the distributions, reduced below the cost
of such Shares and the distributions (or portions thereof) represent a return
of a portion of the purchase price.
 
 
                                NET ASSET VALUE
 
  The NAV per Share of each Class of a Fund is calculated by the Fund's
custodian as of the close of regular trading on the New York Stock Exchange
(which is normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m. New York
time), on each Business Day (as such term is defined under "Additional
Information"). The NAV per Share of each Class is calculated by determining
the net assets attributed to each Class and dividing by the number of
outstanding Shares of that Class. Portfolio securities are valued based on
market quotations or, if accurate quotations are not readily available, at
fair value as determined in good faith under procedures established by the
Trustees.
 
 
                            PERFORMANCE INFORMATION
 
  From time to time each Fund may publish average annual total return in
advertisements and communications to shareholders or prospective investors.
Average annual total return is determined by computing the average annual
percentage change in value of $1,000 invested at the maximum public offering
price for specified periods ending with the most recent calendar quarter,
assuming reinvestment of all dividends and distributions at NAV. The total
return calculation assumes a complete redemption of the investment at the end
of the relevant period. Total return calculations for Class A Shares reflect
the effect of paying the maximum initial sales charge. Investment at a lower
sales charge would result in higher performance figures. Total return
calculations for Class B and Class C Shares reflect deduction of the
applicable CDSC imposed upon redemption of Class B and Class C Shares held for
the applicable period. Each Fund may also from time to time advertise total
return on a cumulative, average, year-by-year or other basis for various
specified periods by means of quotations, charts, graphs or schedules. In
addition, each Fund may furnish total return calculations based on investments
at various sales charge levels or at NAV. Any performance information which is
based on a Fund's NAV per Share would be reduced if any applicable sales
charge were taken into account. In addition to the above, each Fund may from
time to time advertise its performance relative to certain averages,
performance rankings, indices, other information prepared by recognized mutual
fund statistical services and investments for which reliable performance
information is available.
 
                                      50
<PAGE>
 
  Each Fund's total return will be calculated separately for each Class of
Shares in existence. Because each Class of Shares may be subject to different
expenses, the total return calculations with respect to each Class of Shares
for the same period will differ. The investment performance of the Class A,
Class B and Class C Shares will be affected by the payment of a sales charge,
distribution and service fees and other Class specific expenses. See "Shares
of the Trust."
 
  The Funds' performance quotations do not reflect any fees charged by an
Authorized Dealer to its customer accounts in connection with investments in
the Funds. The investment results of a Fund will fluctuate over time and any
presentation of investment results for any prior period should not be
considered a representation of what an investment may earn or what the Fund's
performance may be in any future period. In addition to information provided
in shareholder reports, the Funds may, in their discretion, from time to time,
make a list of their holdings available to investors upon request.
 
 
                              SHARES OF THE TRUST
 
  Each Fund is a series of Goldman Sachs Trust, which was formed under the
laws of the State of Delaware on January 28, 1997. Each Fund (except the
Japanese Equity, International Small Cap and CORE International Equity Funds)
was formerly a series of Goldman Sachs Equity Portfolios, Inc., a Maryland
corporation, and was reorganized into the Trust as of April 30, 1997. The
Trustees have authority under the Trust's Declaration of Trust to create and
classify Shares of beneficial interest in separate series, without further
action by shareholders. Additional series may be added in the future. The
Trustees also have authority to classify and reclassify any series or
portfolio of Shares into one or more Classes. Information about the Trust's
other series and classes is contained in separate prospectuses.
 
  When issued, Shares are fully paid and non-assessable. In the event of
liquidation, shareholders of each class are entitled to share pro rata in the
net assets of the applicable Fund available for distribution to the
shareholders of such Class. All Shares are freely transferable and have no
preemptive, subscription or conversion rights. Shareholders are entitled to
one vote per Share, provided that at the option of the Trustees, shareholders
will be entitled to a number of votes based upon the NAVs represented by their
Shares.
 
  As of April 3, 1998, Goldman Sachs CORE International Equity Omnibus A/C-
Growth and Income Strategy, 4900 Sears Tower, Chicago, IL 60606 was
recordholder of 29.1% of CORE International Equity Fund's outstanding Shares.
 
  The Trust does not intend to hold annual meetings of shareholders. However,
recordholders may, under certain circumstances, as permitted by the Act,
communicate with other shareholders in connection with requiring a special
meeting of shareholders. The Trustees will call a special meeting of
shareholders for the purpose of electing Trustees if, at any time, less than a
majority of Trustees holding office at the time were elected by shareholders.
 
  In the interest of economy and convenience, the Trust does not issue
certificates representing the Funds' Shares. Instead, the Transfer Agent
maintains a record of each shareholder's ownership. Each shareholder receives
confirmation of purchase and redemption orders from the Transfer Agent. Fund
Shares and any dividends and distributions paid by the Funds are reflected in
account statements from the Transfer Agent.
 
                                      51
<PAGE>
 
 
                                   TAXATION
 
FEDERAL TAXES
 
  Each Fund is treated as a separate entity for tax purposes. The Japanese
Equity and International Small Cap Funds intend to elect and each other Fund
has elected to be treated as a regulated investment company, and each Fund
intends to continue to qualify for such treatment for each taxable year under
Subchapter M of the Code. To qualify as such, a Fund must satisfy certain
requirements relating to the sources of its income, diversification of its
assets and distribution of its income to shareholders. As a regulated
investment company, a Fund will not be subject to federal income or excise tax
on any net investment income and net realized capital gains that are
distributed to its shareholders in accordance with certain timing requirements
of the Code.
 
  Dividends paid by a Fund from net investment income, certain net realized
foreign exchange gains, the excess of net short-term capital gain over net
long-term capital loss and original issue discount or market discount income
will be taxable to shareholders as ordinary income. Distributions out of the
net capital gain (the excess of net long-term capital gain over net short-term
capital loss), if any, of a Fund will be taxed as long-term capital gains,
regardless of the length of time a shareholder has held Shares or whether such
gain was reflected in the price paid for the Shares. These tax consequences
will apply whether distributions are received in cash or reinvested in Shares.
A Fund's dividends that are paid to its corporate shareholders and are
attributable to qualifying dividends such Fund receives from U.S. domestic
corporations may be eligible, in the hands of such corporate shareholders, for
the corporate dividends-received deduction, subject to certain holding period
requirements and debt financing limitations under the Code. Dividends paid by
the Funds are not generally expected to qualify, in the hands of corporate
shareholders, for the corporate dividends-received deduction. Certain
distributions paid by a Fund in January of a given year may be taxable to
shareholders as if received the prior December 31. Shareholders will be
informed annually about the amount and character of distributions received
from the Funds for federal income tax purposes.
 
  Investors should consider the tax implications of buying Shares immediately
prior to a distribution. Investors who purchase Shares shortly before the
record date for a distribution will pay a per Share price that includes the
value of the anticipated distribution and will be taxed on the distribution
even though the distribution represents a return of a portion of the purchase
price.
 
  Redemptions and exchanges of Shares are taxable events.
 
  Individuals and certain other classes of shareholders may be subject to 31%
backup withholding of federal income tax on distributions, redemptions and
exchanges if they fail to furnish their correct taxpayer identification number
and certain certifications required by the Internal Revenue Service or if they
are otherwise subject to backup withholding. Individuals, corporations and
other shareholders that are not U.S. persons under the Code are subject to
different tax rules and may be subject to nonresident alien withholding at the
rate of 30% (or a lower rate provided by an applicable tax treaty, if any) on
amounts treated as ordinary dividends from the Funds.
 
  Each Fund may be subject to foreign withholding or other foreign taxes on
income or gain from certain foreign securities. The Funds may elect to pass
such foreign taxes through to their shareholders, who would then take such
taxes into account on their own tax returns. Alternatively, the Funds may
simply deduct such taxes in determining the amounts available for distribution
to shareholders. Generally, the Funds have taken the latter approach and
anticipate that they may continue to do so.
 
                                      52
<PAGE>
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local
or foreign taxes on payments received from the Funds. A state income (and
possibly local income and/or intangible property) tax exemption may be
available to the extent (if any) a Fund's distributions are derived from
interest on (or, in the case of intangible property taxes, the value of its
assets is attributable to) certain U.S. Government obligations, provided in
some states that certain thresholds for holdings of such obligations and/or
reporting requirements are satisfied. For a further discussion of certain tax
consequences of investing in Shares of the Funds, see "Taxation" in the
Additional Statement. Shareholders are urged to consult their own tax advisers
regarding specific questions as to federal, state and local taxes as well as
to any foreign taxes.
 
 
                            ADDITIONAL INFORMATION
 
  As used in this Prospectus, the term "Business Day" means any day the New
York Stock Exchange is open for trading, which is Monday through Friday except
for holidays. The New York Stock Exchange is closed on the following holidays:
New Year's Day, Dr. Martin Luther King, Jr. Day, Presidents' Day (observed),
Good Friday, Memorial Day (observed), Independence Day, Labor Day,
Thanksgiving Day and Christmas Day.
 
                                      53
<PAGE>
 
 
                                   APPENDIX
 
                            STATEMENT OF INTENTION
    (APPLICABLE ONLY TO CLASS A SHARES PURCHASED SUBJECT TO A SALES CHARGE)
 
  If a shareholder anticipates purchasing $50,000 or more of Class A Shares of
a Fund alone or in combination with Class A Shares of another Fund or another
Goldman Sachs Fund within a 13-month period, the shareholder may obtain Shares
of the Fund at the same reduced sales charge as though the total quantity were
invested in one lump sum by filing this Statement of Intention incorporated by
reference in the Account Application. Income dividends and capital gain
distributions taken in additional Shares will not apply toward the completion
of this Statement of Intention.
 
  To ensure that the reduced price will be received on future purchases, the
investor must inform Goldman Sachs that this Statement of Intention is in
effect each time Shares are purchased. Subject to the conditions mentioned
below, each purchase will be made at the public offering price applicable to a
single transaction of the dollar amount specified on the Account Application.
The investor makes no commitment to purchase additional shares, but if the
investor's purchases within 13 months plus the value of Shares credited toward
completion do not total the sum specified, the investor will pay the increased
amount of the sales charge prescribed in the Escrow Agreement.
 
                               ESCROW AGREEMENT
 
  Out of the initial purchase (or subsequent purchases if necessary), 5% of
the dollar amount specified on the Account Application shall be held in escrow
by the Transfer Agent in the form of Shares registered in the investor's name.
All income dividends and capital gains distributions on escrowed Shares will
be paid to the investor or to his or her order. When the minimum investment so
specified is completed (either prior to or by the end of the 13th month), the
investor will be notified and the escrowed Shares will be released. In signing
the Account Application, the investor irrevocably constitutes and appoints the
Transfer Agent his or her attorney to surrender for redemption any or all
escrowed Shares with full power of substitution in the premises.
 
  If the intended investment is not completed, the investor will be asked to
remit to Goldman Sachs any difference between the sales charge on the amount
specified and on the amount actually attained. If the investor does not within
20 days after written request by Goldman Sachs pay such difference in the
sales charge, the Transfer Agent will redeem an appropriate number of the
escrowed Shares in order to realize such difference. Shares remaining after
any such redemption will be released by the Transfer Agent.
 
                                      A-1
<PAGE>
 
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GOLDMAN SACHS ASSET
MANAGEMENT
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN SACHS ASSET
MANAGEMENT INTERNATIONAL
133 PETERBOROUGH COURT
LONDON, ENGLAND EC4A 2BB
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR
85 BROAD STREET
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
TRANSFER AGENT
4900 SEARS TOWER
CHICAGO, ILLINOIS 60606
 
STATE STREET BANK AND TRUST COMPANY
CUSTODIAN
1776 HERITAGE DRIVE
NORTH QUINCY, MASSACHUSETTS 02171
 
ARTHUR ANDERSEN LLP
INDEPENDENT PUBLIC ACCOUNTANTS
225 FRANKLIN STREET
BOSTON, MASSACHUSETTS 02110
 
TOLL FREE (IN U.S.) . . . . . . . . 800-526-7384
 
EQINTLPROABC
501413
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS
INTERNATIONAL
 
EQUITY FUNDS
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
 
CLASS A, B AND C SHARES
 
 
 
LOGO
Goldman
Sachs
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
- --------------------------------------------------------------------------------
 
PROSPECTUS          GOLDMAN SACHS INTERNATIONAL EQUITY FUNDS
May 1, 1998, as revised          SERVICE SHARES
September 1, 1998
 
                                    GOLDMAN SACHS INTERNATIONAL SMALL CAP FUND
GOLDMAN SACHS CORE INTERNATIONAL      Seeks long-term capital appreciation
EQUITY FUND                           through investments in equity securities
 Seeks long term growth of cap-       of companies with public stock market
 ital through a broadly diver-        capitalizations of $1 billion or less at
 sified portfolio of equity se-       the time of investment that are orga-
 curities of large cap compa-         nized outside the U.S. or whose securi-
 nies that are organized out-         ties are principally traded outside the
 side the U.S. or whose securi-       U.S.
 ties are principally traded
 outside the U.S.                   GOLDMAN SACHS EMERGING MARKETS
                                    EQUITY FUND
GOLDMAN SACHS INTERNATIONAL           Seeks long-term capital appreciation
EQUITY FUND                           through investments in equity securities
 Seeks long-term capital appre-       of emerging country issuers.
 ciation through investments in
 equity securities of companies     GOLDMAN SACHS ASIA GROWTH FUND
 that are organized outside the       Seeks long-term capital appreciation
 U.S. or whose securities are         through investments in equity securities
 principally traded outside the       of companies related (in the manner de-
 U.S.                                 scribed herein) to Asian countries.
 
GOLDMAN SACHS JAPANESE EQUITY
FUND
 Seeks long-term capital appre-
 ciation through investments in
 equity securities of Japanese
 companies.
 
                                 -------------
 
  Goldman Sachs Asset Management ("GSAM"), New York, New York, a separate
operating division of Goldman, Sachs & Co. ("Goldman Sachs"), serves as
investment adviser to the CORE International Equity Fund. Goldman Sachs Asset
Management International ("GSAMI"), London, England, an affiliate of Goldman
Sachs, serves as investment adviser to each other Fund. GSAM and GSAMI are each
referred to in this Prospectus as the "Investment Adviser." Goldman Sachs
serves as each Fund's distributor and transfer agent.
 
  This Prospectus provides information about Goldman Sachs Trust (the "Trust")
and the Funds that a prospective investor should understand before investing.
This Prospectus should be retained for future reference. A Statement of
Additional Information (the "Additional Statement"), dated May 1, 1998, as
revised September 1, 1998, containing further information about the Trust and
the Funds which may be of interest to investors, has been filed with the
Securities and Exchange Commission ("SEC"), is incorporated herein by reference
in its entirety, and may be obtained without charge from Service Organizations
(as defined herein), or Goldman Sachs by calling the telephone number, or
writing to one of the addresses, listed on the back cover of this Prospectus.
The SEC maintains a Web site (http://www.sec.gov) that contains the Additional
Statement and other information regarding the Trust.
 
SERVICE SHARES OF THE FUNDS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED
OR ENDORSED BY, ANY BANK OR OTHER INSURED DEPOSITORY INSTITUTION AND ARE NOT
INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD
OR ANY OTHER GOVERNMENT AGENCY. AN INVESTMENT IN A FUND INVOLVES INVESTMENT
RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
 
                                                        (continued on next page)
<PAGE>
 
 
(cover continued)
 
  A FUND'S INVESTMENTS IN SECURITIES OF FOREIGN ISSUERS AND FOREIGN CURRENCIES
ENTAIL CERTAIN RISKS NOT CUSTOMARILY ASSOCIATED WITH INVESTING IN SECURITIES OF
U.S. ISSUERS QUOTED IN U.S. DOLLARS, INCLUDING RISKS RELATING TO CHANGES IN
RELATIVE CURRENCY EXCHANGE RATES OR (AS IN THE CASE OF THE EXPECTED
INTRODUCTION OF THE EURO) THE CREATION OF NEW CURRENCIES. THE SECURITIES
MARKETS OF ASIAN, LATIN AMERICAN, EASTERN EUROPEAN, AFRICAN AND OTHER EMERGING
COUNTRIES IN WHICH THE CORE INTERNATIONAL EQUITY FUND CAN INVEST A PORTION OF
ITS ASSETS AND THE INTERNATIONAL SMALL CAP, INTERNATIONAL EQUITY, EMERGING
MARKETS AND ASIA GROWTH FUNDS MAY INVEST WITHOUT LIMIT, ARE LESS LIQUID, ARE
ESPECIALLY SUBJECT TO GREATER PRICE VOLATILITY, HAVE SMALLER MARKET
CAPITALIZATIONS, HAVE LESS GOVERNMENT REGULATION AND ARE NOT SUBJECT TO AS
EXTENSIVE AND FREQUENT ACCOUNTING, FINANCIAL AND OTHER REPORTING REQUIREMENTS
AS THE SECURITIES MARKETS OF MORE DEVELOPED COUNTRIES. FURTHER, INVESTMENT IN
EQUITY SECURITIES OF ISSUERS LOCATED IN RUSSIA AND CERTAIN OTHER EMERGING
COUNTRIES INVOLVES RISK OF LOSS RESULTING FROM PROBLEMS IN SHARE REGISTRATION
AND CUSTODY, WHICH RISKS ARE NOT NORMALLY ASSOCIATED WITH INVESTMENT IN MORE
DEVELOPED COUNTRIES. FUNDS THAT INVEST IN FOREIGN SECURITIES AND EMERGING
MARKETS ARE INTENDED FOR INVESTORS WHO CAN ACCEPT THE RISKS ASSOCIATED WITH
THESE INVESTMENTS AND MAY NOT BE SUITABLE FOR ALL INVESTORS. THE JAPANESE
EQUITY AND ASIA GROWTH FUNDS WILL BE PARTICULARLY SUBJECT TO EVENTS AFFECTING
THE MARKETS IN WHICH THESE FUNDS CONCENTRATE THEIR INVESTMENTS. SEE
"DESCRIPTION OF SECURITIES" AND "RISK FACTORS."
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
Fund Highlights....................    3
Fees and Expenses..................    6
Financial Highlights...............    8
Investment Objectives and Policies.   12
Description of Securities..........   17
Investment Techniques..............   21
Risk Factors.......................   24
Investment Restrictions............   28
Portfolio Turnover.................   28
Management.........................   28
Expenses...........................   34
Net Asset Value....................   34
</TABLE>
<TABLE>
<CAPTION>
                               PAGE
                               ----
<S>                            <C>
Performance Information.......  34
Shares of the Trust...........  35
Taxation......................  36
Additional Information........  37
Additional Services...........  38
Reports to Shareholders.......  38
Dividends.....................  39
Purchase of Service Shares....  39
Exchange Privilege............  41
Redemption of Service Shares..  41
Appendix...................... A-1
</TABLE>
 
                                       2
<PAGE>
 
 
                                FUND HIGHLIGHTS
 
   The following is intended to highlight certain information and is
 qualified in its entirety by the more detailed information contained in
 this Prospectus.
 
  WHAT IS THE GOLDMAN SACHS TRUST?
 
   The Goldman Sachs Trust is an open-end management investment company
 that offers its shares ("Shares") in several investment funds (commonly
 known as mutual funds (the "Funds")). Each Fund pools the monies of
 investors by selling its Shares to the public and investing these monies
 in a portfolio of securities designed to achieve that Fund's stated
 investment objectives.
 
  WHAT ARE THE INVESTMENT OBJECTIVES AND POLICIES OF THE FUNDS?
 
   Each Fund has distinct investment objectives and policies. There can be
 no assurance that a Fund's objectives will be achieved. Each Fund is a
 "diversified open-end management company" as defined in the Investment
 Company Act of 1940, as amended (the "Act"). For a further description of
 each Fund's investment objectives and policies, see "Investment
 Objectives and Policies," "Description of Securities" and "Investment
 Techniques."
 
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                   INVESTMENT
 FUND NAME         OBJECTIVES               INVESTMENT CRITERIA                BENCHMARK
- --------------  ----------------  ---------------------------------------  ----------------
<S>             <C>               <C>                                      <C>
 CORE           Long-term growth  At least 90% of total assets in equity   EAFE Index
 INTERNATIONAL  of capital.       securities of companies organized        (unhedged)
 EQUITY FUND                      outside the United States or whose
                                  securities are principally traded
                                  outside the United States. The Fund
                                  seeks broad representation of large cap
                                  issuers across major countries and
                                  sectors of the international economy.
                                  The Fund's investments are selected
                                  using both a variety of quantitative
                                  techniques and fundamental research in
                                  seeking to maximize the Fund's expected
                                  return, while maintaining risk, style,
                                  capitalization and industry
                                  characteristics similar to the unhedged
                                  Morgan Stanley Capital International
                                  (MSCI) Europe, Australasia and Far East
                                  Index (the "EAFE Index"). The Fund may
                                  employ certain currency management
                                  techniques.
- -------------------------------------------------------------------------------------------
 INTERNATIONAL  Long-term         Substantially all, and at least 65%, of  FT/Actuaries
 EQUITY FUND    capital           total assets in equity securities        Europe and
                appreciation.     of companies organized outside           Pacific Index
                                  the United States or whose securities    (unhedged)
                                  are principally traded outside the
                                  United States. The Fund may employ
                                  currency management techniques.
- -------------------------------------------------------------------------------------------
 JAPANESE       Long-term         Substantially all, and at least 65%, of  Tokyo Price
 EQUITY FUND    capital           total assets in equity securities of     Index ("TOPIX")
                appreciation.     Japanese companies. The Fund may employ
                                  currency management techniques.
- -------------------------------------------------------------------------------------------
 INTERNATIONAL  Long-term         Substantially all, and at least 65%, of  Morgan Stanley
 SMALL CAP      capital           total assets in equity securities of     Capital
 FUND           appreciation.     companies with public stock market       International
                                  capitalizations of $1 billion or less    EAFE Small Cap
                                  at the time of investment that are       Index
                                  organized outside the United States or
                                  whose securities are principally traded
                                  outside the United States. The Fund may
                                  employ currency management techniques.
</TABLE>
 
 
                                                                     (continued)
 
 
                                       3
<PAGE>
 
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                INVESTMENT
 FUND NAME      OBJECTIVES               INVESTMENT CRITERIA                BENCHMARK
- ------------ ----------------  ---------------------------------------  ----------------
<S>          <C>               <C>                                      <C>
 EMERGING    Long-term         Substantially all, and at least 65%, of  Morgan Stanley
 MARKETS     capital           its total assets in equity securities    Capital
 EQUITY FUND appreciation.     of emerging country issuers. The Fund    International
                               may employ certain currency management   Emerging Markets
                               techniques.                              Free Index
- ----------------------------------------------------------------------------------------
 ASIA GROWTH Long-term         Substantially all, and at least 65%, of  Morgan Stanley
 FUND        capital           total assets in equity securities        Capital
             appreciation.     of companies in China, Hong              International
                               Kong, India, Indonesia, Malaysia,        All Country Asia
                               Pakistan, the Philippines, Singapore,    Free ex-Japan
                               South Korea, Sri Lanka, Taiwan,          Index
                               Thailand and other Asian countries.
                               The Fund may employ certain currency
                               management techniques.
</TABLE>
 
 
 WHAT ARE THE RISK FACTORS AND SPECIAL CHARACTERISTICS THAT I SHOULD
 CONSIDER BEFORE INVESTING?
 
  Each Fund's Share price will fluctuate with market, economic and, to the
extent applicable, foreign exchange conditions, so that an investment in
any of the Funds may be worth more or less when redeemed than when
purchased. None of the Funds should be relied upon as a complete investment
program. There can be no assurance that a Fund's investment objectives will
be achieved. See "Risk Factors."
 
  Risks of Investing in Small Capitalization Companies. To the extent that
a Fund invests in the securities of small market capitalization companies,
the Fund may be exposed to a higher degree of risk and price volatility.
Securities of such issuers may lack sufficient market liquidity to enable a
Fund to effect sales at an advantageous time or without a substantial drop
in price.
 
  Foreign Risks. Investments in securities of foreign issuers and
currencies involve risks that are different from those associated with
investments in domestic securities. The risks associated with foreign
investments and currencies include changes in relative currency exchange
rates (or, as in the case of the expected introduction of the euro next
year, the creation of new currencies), political and economic developments,
the imposition of exchange controls, confiscation and other governmental
restrictions. Generally, there is less availability of data on foreign
companies and securities markets as well as less regulation of foreign
stock exchanges, brokers and issuers. A Fund's investments in emerging
markets and countries ("Emerging Countries") involves greater risks than
investments in the developed countries of Western Europe, the United
States, Canada, Australia, New Zealand and Japan. In addition, because the
Funds invest primarily outside the United States, they may involve greater
risks, since the securities markets of foreign countries are generally less
liquid and subject to greater price volatility. The securities markets of
Emerging Countries, including those in Asia, Latin America, Eastern Europe
and Africa are marked by a high concentration of market capitalization and
trading volume in a small number of issuers representing a limited number
of industries, as well as a high concentration of ownership of such
securities by a limited number of investors.
 
  Risks of Investing in Japanese Markets. The Japanese Equity Fund will
concentrate in Japanese securities and, therefore, will be particularly
subject to the risk of adverse social, political and economic events which
occur in Japan or affect the Japanese markets.
 
  Other. A Fund's use of certain investment techniques, including
derivatives, forward contracts, options and futures, will subject the Fund
to greater risk than funds that do not employ such techniques.
 
 WHO MANAGES THE FUNDS?
 
  Goldman Sachs Asset Management serves as Investment Adviser to the CORE
International Equity Fund. Goldman Sachs Asset Management International
serves as Investment Adviser to each other Fund. As of
 
                                       4
<PAGE>
 
July 24, 1998, the Investment Advisers, together with their affiliates,
acted as investment adviser or distributor for assets in excess of $168
billion.
 
 WHO DISTRIBUTES THE FUNDS' SHARES?
 
  Goldman Sachs acts as distributor of each Fund's Shares (the
"Distributor").
 
 WHAT IS THE MINIMUM INVESTMENT?
 
  The Funds do not have any minimum purchase or account requirements with
respect to Service Shares. A Service Organization may, however, impose a
minimum amount for initial and subsequent investments in Service Shares,
and may establish other requirements such as a minimum account balance.
 
 HOW DO I PURCHASE SERVICE SHARES?
 
  Customers of Service Organizations may invest in Service Shares only
through their Service Organizations. Service Shares of a Fund are purchased
at the current net asset value ("NAV") without any sales load. See
"Purchase of Service Shares."
 
  ADDITIONAL SERVICES. The Trust, on behalf of the Funds, has adopted a
Service Plan with respect to the Service Shares which authorizes a Fund to
compensate Service Organizations for providing account administration and
shareholder liaison services to their customers who are the beneficial
owners of such Shares. The Trust, on behalf of the Funds, will enter into
agreements with each Service Organization which will provide for
compensation to the Service Organization in an amount up to 0.50% (on an
annualized basis) of the average daily net assets of the Service Shares of
the Funds attributable to or held in the name of the Service Organization
for its customers. See "Additional Services."
 
 HOW DO I SELL MY SERVICE SHARES?
 
  You may redeem Service Shares upon request on any Business Day, as
defined under "Additional Information," at the NAV next determined after
receipt of such request in proper form. See "Redemption of Service Shares."
 
 HOW DO I RECEIVE DIVIDENDS AND DISTRIBUTIONS?
 
 
<TABLE>
<CAPTION>
   INVESTMENT INCOME DIVIDENDS                                   CAPITAL GAINS
        DECLARED AND PAID                                        DISTRIBUTIONS
   ---------------------------                                   -------------
   <S>                                                           <C>
            Annually                                               Annually
</TABLE>
 
  Recordholders of Service Shares may receive dividends and distributions
in additional Service Shares of the Fund in which they have invested or may
elect to receive them in cash. For further information concerning dividends
and distributions, see "Dividends."
 
                                       5
<PAGE>
 
 
                               FEES AND EXPENSES
                               (SERVICE SHARES)
 
<TABLE>
<CAPTION>
                                  CORE                  INT'L  EMERGING
                                 INT'L  INT'L  JAPANESE SMALL  MARKETS   ASIA
                                 EQUITY EQUITY  EQUITY   CAP    EQUITY  GROWTH
                                  FUND   FUND    FUND   FUND     FUND   FUND/5/
                                 ------ ------ -------- -----  -------- -------
<S>                              <C>    <C>    <C>      <C>    <C>      <C>
SHAREHOLDER TRANSACTION
EXPENSES:
 Maximum Sales Charge Imposed
  on Purchases.................   None   None    None   None     None    None
 Maximum Sales Charge Imposed
  on Reinvested Dividends......   None   None    None   None     None    None
 Redemption Fees...............   None   None    None   None     None    None
 Exchange Fees.................   None   None    None   None     None    None
ANNUAL FUND OPERATING EXPENSES:
 (as a percentage of average
 daily net assets)/1/
 Management Fees...............   0.85%  1.00%   1.00%  1.20%    1.20%   1.00%
 Service Fees/2/...............   0.50%  0.50%   0.50%  0.50%    0.50%   0.50%
 Other Expenses (after applica-
  ble limitations)/3/..........   0.16%  0.14%   0.05%  0.20%    0.19%   0.20%
                                  ----   ----    ----   ----     ----    ----
TOTAL FUND OPERATING EXPENSES
 (AFTER EXPENSE
 LIMITATIONS)/4/...............   1.51%  1.64%   1.55%  1.90%    1.89%   1.70%
                                  ====   ====    ====   ====     ====    ====
</TABLE>
- ---------------------
/1/ The Funds' annual operating expenses have been restated to reflect fees
    and expenses in effect as of September 1, 1998.
/2/ Service Organizations may charge other fees to their customers who are
    beneficial owners of Service Shares in connection with their customer
    accounts.
/3/The Investment Adviser has voluntarily agreed to reduce or limit certain
   other expenses (excluding management fees, service fees, transfer agency
   fees (equal to 0.04% of the average daily net assets of each Funds' Service
   Shares), taxes, interest and brokerage fees and litigation, indemnification
   and other extraordinary expenses) for each Fund to the extent such expenses
   exceed the following percentages of average daily net assets:
<TABLE>
<CAPTION>
                                                               OTHER
                                                              EXPENSES
                                                              --------
      <S>                                                     <C>      <C>
      CORE International Equity..............................  0.12%
      International Equity...................................  0.10%
      Japanese Equity........................................  0.01%
      International Small Cap................................  0.16%
      Emerging Markets Equity................................  0.15%
      Asia Growth............................................  0.16%
 
/4/ Without the limitations described above, "Other Expenses" and "Total
    Operating Expenses" of the Service Shares of the Funds would be as set
    forth below:
<CAPTION>
                                                                         TOTAL
                                                               OTHER   OPERATING
                                                              EXPENSES EXPENSES
                                                              -------- ---------
      <S>                                                     <C>      <C>
      CORE International Equity..............................  0.44%     1.79%
      International Equity...................................  0.22%     1.72%
      Japanese Equity........................................  2.07%     3.57%
      International Small Cap................................  3.35%     5.05%
      Emerging Markets Equity................................  0.50%     2.20%
      Asia Growth............................................  0.35%     1.85%
</TABLE>
 
/5/ Service Shares had not commenced operations as of the date of this
    Prospectus.
 
                                       6
<PAGE>
 
<TABLE>
<CAPTION>
EXAMPLE:                                       1 YEAR 3 YEARS 5 YEARS 10 YEARS
- --------                                       ------ ------- ------- --------
<S>                                            <C>    <C>     <C>     <C>
You would pay the following expenses on a
 hypothetical $1,000 investment, assuming (1)
 a 5% annual return and (2) redemption at the
 end of each time period:
CORE International Equity.....................  $15     $48    $ 82     $180
International Equity..........................   17      52      89      194
Japanese Equity...............................   16      49     N/A      N/A
International Small Cap.......................   19      60     N/A      N/A
Emerging Markets Equity.......................   19      59     N/A      N/A
Asia Growth...................................   17      54      92      201
</TABLE>
 
  The Investment Adviser and Goldman Sachs may modify or discontinue any of
the limitations set forth above in the future at their discretion. The
information set forth in the foregoing table and hypothetical example relates
only to Service Shares of the Funds. Each Fund also offers Institutional
Shares and Class A, Class B and Class C Shares, which are subject to different
fees and expenses (which affect performance), have different minimum
investment requirements and are entitled to different services. Information
regarding Institutional, Class A, Class B and Class C Shares may be obtained
from an investor's sales representative or from Goldman Sachs by calling the
number on the back of this Prospectus.
 
  In addition to the compensation itemized above, certain Service
Organizations may receive other compensation in connection with the sale and
distribution of Service Shares or for services to their customers' accounts
and/or the Funds. For additional information regarding such compensation, see
"Purchase of Service Shares" in this Prospectus and the Additional Statement.
 
  The purpose of the foregoing table is to assist investors in understanding
the various fees and expenses of a Fund that an investor will bear directly or
indirectly. The information on the fees and expenses included in the table and
hypothetical example above is based on each Fund's fees and expenses (actual
or estimated) and should not be considered as representative of future
expenses. Actual fees and expenses may be greater or less than those
indicated. Moreover, while the example assumes a 5% annual return, a Fund's
actual performance will vary and may result in an actual return greater or
less than 5%. See "Management--Investment Advisers" and "Additional Services."
 
                                       7
<PAGE>
 
 
                             FINANCIAL HIGHLIGHTS
 
 
         SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD
 
  The following data have been audited by Arthur Andersen LLP, independent
public accountants, as indicated in their report incorporated by reference
into the Additional Statement from the Annual Report to shareholders of the
Funds for the year ended January 31, 1998 (the "Annual Report"). This
information should be read in conjunction with the financial statements and
related notes incorporated by reference and attached to the Additional
Statement. The Annual Report also contains performance information and is
available upon request and without charge by calling the telephone number or
writing to one of the addresses on the back cover of this Prospectus. During
the periods shown, the Trust did not offer Shares of the Japanese Equity and
International Small Cap Funds. Accordingly, there are no financial highlights
for these Funds.
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                      INCOME (LOSS) FROM               DISTRIBUTIONS TO
                                   INVESTMENT OPERATIONS(E)              SHAREHOLDERS
                           ---------------------------------------- -----------------------
                                                                                 FROM NET
                                       NET REALIZED   NET REALIZED               REALIZED
                                      AND UNREALIZED AND UNREALIZED              GAIN ON
                 NET ASSET            GAIN (LOSS) ON GAIN (LOSS) ON    FROM     INVESTMENT      NET     NET ASSET
                  VALUE,      NET      INVESTMENTS      CURRENCY       NET         AND       DECREASE    VALUE,
                 BEGINNING INVESTMENT  AND FUTURES      RELATED     INVESTMENT   FUTURES      IN NET     END OF     TOTAL
                 OF PERIOD   INCOME    TRANSACTIONS   TRANSACTIONS    INCOME   TRANSACTIONS ASSET VALUE  PERIOD   RETURN(A)
                 --------- ---------- -------------- -------------- ---------- ------------ ----------- --------- ---------
                                                                                           CORE INTERNATIONAL EQUITY FUND
- ------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>            <C>        <C>          <C>         <C>       <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......  $10.00     $   --       $0.13          $(0.91)      $   --       --         $(0.78)     $9.22     (7.66)%(d)
1998--Class B
Shares(b).......   10.00      (0.02)       0.13           (0.90)          --       --          (0.79)      9.21     (7.90)(d)
1998--Class C
Shares(b).......   10.00      (0.02)       0.13           (0.89)          --       --          (0.78)      9.22     (7.80)(d)
1998--Institu-
tional
Shares(b).......   10.00       0.02        0.13           (0.89)      (0.02)       --          (0.76)      9.24     (7.45)(d)
1998--Service
Shares(b).......   10.00       0.01        0.13           (0.91)          --       --          (0.77)      9.23     (7.70)(d)
<CAPTION>
                                                                                RATIOS ASSUMING
                                                                              NO VOLUNTARY WAIVER
                                                                                   OF FEES OR
                                                                              EXPENSE LIMITATIONS
                                                                            --------------------------
                                                               RATIO OF                   RATIO OF
                                         NET      RATIO OF        NET                        NET
                                      ASSETS AT      NET      INVESTMENT     RATIO OF    INVESTMENT
                 PORTFOLIO  AVERAGE     END OF   EXPENSES TO   INCOME TO     EXPENSES   INCOME (LOSS)
                 TURNOVER  COMMISSION   PERIOD   AVERAGE NET  AVERAGE NET   TO AVERAGE   TO AVERAGE
                   RATE       RATE    IN (000'S)   ASSETS       ASSETS      NET ASSETS   NET ASSETS
                 --------- ---------- ---------- ------------ ------------- ----------- --------------
- ------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>        <C>          <C>           <C>         <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......   25.16%    $.0069    $ 7,087      1.50%(c)     (0.27)%(c)    4.87%(c)     (3.90)%(c)
1998--Class B
Shares(b).......   25.16      .0069      2,721      2.00(c)      (0.72)(c)     5.12(c)      (3.84)(c)
1998--Class C
Shares(b).......   25.16      .0069      1,608      2.00(c)      (0.73)(c)     5.12(c)      (3.85)(c)
1998--Institu-
tional
Shares(b).......   25.16      .0069     17,719      1.00(c)       0.59(c)      4.12(c)      (2.53)(c)
1998--Service
Shares(b).......   25.16      .0069          1      1.50(c)       0.26(c)      4.62(c)      (2.86)(c)
</TABLE>
- -----------
(a) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions, a complete redemption of
    the investment at the net asset value at the end of the period and no
    sales or redemption charges. Total return would be reduced if a sales or
    redemption charge were taken into account.
(b) Commenced operations on August 15, 1997.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per share amounts.
 
 
                                       8
<PAGE>
 
<TABLE>
<CAPTION>
                                        INCOME FROM                              DISTRIBUTIONS TO
                                  INVESTMENT OPERATIONS(E)                         SHAREHOLDERS
                           -------------------------------------- -----------------------------------------------
                                                                                          FROM NET   IN EXCESS OF
                                                     NET REALIZED                         REALIZED   NET REALIZED
                                                         AND                              GAIN ON      GAIN ON       NET
                                                      UNREALIZED                         INVESTMENT   INVESTMENT   INCREASE
                 NET ASSET    NET      NET REALIZED  GAIN (LOSS)             IN EXCESS  AND FOREIGN  AND FOREIGN  (DECREASE)
                  VALUE,   INVESTMENT AND UNREALIZED ON CURRENCY   FROM NET    OF NET     CURRENCY     CURRENCY     IN NET
                 BEGINNING   INCOME   GAIN (LOSS) ON   RELATED    INVESTMENT INVESTMENT   RELATED      RELATED      ASSET
                 OF PERIOD   (LOSS)    INVESTMENTS   TRANSACTIONS   INCOME     INCOME   TRANSACTIONS TRANSACTIONS   VALUE
                 --------- ---------- -------------- ------------ ---------- ---------- ------------ ------------ ----------
                                                                                                INTERNATIONAL EQUITY FUND
- ----------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>          <C>        <C>        <C>          <C>          <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $19.32     $0.03        $2.99         $(0.95)     $  --      $(0.30)     $(0.88)      $(0.36)     $0.53
1998--Class B
Shares..........   19.24     (0.08)        2.96          (0.94)        --       (0.25)      (0.47)       (0.76)      0.46
1998--Class C
Shares(b).......   22.60     (0.04)       (2.03)          0.65         --       (0.38)         --        (1.24)     (3.04)
1998--Institu-
tional Shares...   19.40      0.10         3.09          (0.98)     (0.07)      (0.33)      (0.97)       (0.27)      0.57
1998--Service
Shares..........   19.34      0.02         3.02          (0.96)        --       (0.35)      (0.18)       (1.05)      0.50
- ----------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   17.20      0.10         3.51          (1.28)        --          --       (0.21)          --       2.12
1997--Class B
Shares(b).......   18.91     (0.06)        0.94          (0.34)        --          --       (0.21)          --       0.33
1997--Institu-
tional
Shares(b).......   17.45      0.04         3.39          (1.24)     (0.03)         --       (0.21)          --       1.95
1997--Service
Shares(b).......   17.70     (0.02)        2.95          (1.08)        --          --       (0.21)          --       1.64
- ----------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   14.52      0.13         2.58           1.42      (0.58)         --       (0.87)          --       2.68
- ----------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   18.10      0.06        (3.04)         (0.01)        --          --       (0.59)          --      (3.58)
- ----------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   14.35      0.05         4.08          (0.38)        --          --          --           --       3.75
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1993--Class A
Shares(b).......   14.18     (0.01)        0.29          (0.11)        --          --          --           --       0.17
<CAPTION>
                                                                                             RATIOS ASSUMING
                                                                                           NO VOLUNTARY WAIVER
                                                                                                OF FEES OR
                                                                                           EXPENSE LIMITATIONS
                                                                                          -----------------------
                                                            NET    RATIO OF   RATIO OF
                                                           ASSETS    NET        NET       RATIO OF    RATIO OF
                  NET                                      AT END  EXPENSES  INVESTMENT   EXPENSES       NET
                 ASSET                                       OF       TO       INCOME        TO      INVESTMENT
                 VALUE,              PORTFOLIO  AVERAGE    PERIOD  AVERAGE   (LOSS) TO    AVERAGE   INCOME (LOSS)
                 END OF   TOTAL      TURNOVER  COMMISSION   (IN      NET      AVERAGE       NET      TO AVERAGE
                 PERIOD RETURN(A)      RATE     RATE(F)    000S)    ASSETS   NET ASSETS    ASSETS    NET ASSETS
                 ------ ------------ --------- ---------- -------- --------- ------------ --------- -------------
- ----------------------------------------------------------------------------------------------------------------------------
<S>              <C>    <C>          <C>       <C>        <C>      <C>       <C>          <C>       <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares.......... $19.85   11.12%       40.82%    $.0207   $697,590   1.67%     (0.27)%      1.80%       (0.40)%
1998--Class B
Shares..........  19.70   10.51        40.82      .0207     55,324   2.20      (0.90)       2.30        (1.00)
1998--Class C
Shares(b).......  19.56   (5.92)(d)    40.82      .0207      3,369   2.27(c)   (1.43)(c)    2.37(c)     (1.53)(c)
1998--Institu-
tional Shares...  19.97   11.82        40.82      .0207     56,263   1.08       0.30        1.18         0.20
1998--Service
Shares..........  19.84   11.25        40.82      .0207      3,035   1.55      (0.36)       1.65        (0.46)
- ----------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........  19.32   13.48        38.01      .0318    536,283   1.69      (0.07)       1.88        (0.26)
1997--Class B
Shares(b).......  19.24    2.83(d)     38.01      .0318     19,198   2.23(c)   (0.97)(c)    2.38(c)     (1.12)(c)
1997--Institu-
tional
Shares(b).......  19.40   12.53(d)     38.01      .0318     68,374   1.10(c)    0.43(c)     1.25(c)      0.28(c)
1997--Service
Shares(b).......  19.34   10.42(d)     38.01      .0318        674   1.60(c)   (0.40)(c)    1.75(c)     (0.55)(c)
- ----------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........  17.20   28.68        68.48         --    330,860   1.52       0.26        1.77         0.01
- ----------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........  14.52  (16.65)       84.54         --    275,086   1.73       0.40        1.98         0.15
- ----------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........  18.10   26.13        60.04         --    269,091   1.76       0.51        2.01         0.26
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1993--Class A
Shares(b).......  14.35    1.23(d)      0.00         --     66,063   1.80(c)   (0.42)(c)    2.58(c)     (1.20)(c)
</TABLE>
- -----------
(a) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions, a complete redemption of
    the investment at the net asset value at the end of the period and no
    sales or redemption charges. Total return would be reduced if a sales or
    redemption charge were taken into account.
(b) Class A, Class B, Class C, Institutional and Service share activity
    commenced on December 1, 1992, May 1, 1996, August 15, 1997, February 7,
    1996 and March 6, 1996, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
 
                                       9
<PAGE>
 
<TABLE>
<CAPTION>
                                           INCOME FROM
                                     INVESTMENT OPERATIONS(E)             DISTRIBUTIONS TO SHAREHOLDERS
                            ------------------------------------------ -----------------------------------
                                                        NET REALIZED                FROM NET
                  NET ASSET             NET REALIZED   AND UNREALIZED             REALIZED GAIN IN EXCESS
                   VALUE,      NET     AND UNREALIZED LOSS ON FOREIGN   FROM NET  ON INVESTMENT   OF NET   NET DECREASE NET ASSET
                  BEGINNING INVESTMENT GAIN (LOSS) ON CURRENCY RELATED INVESTMENT  AND OPTIONS  INVESTMENT IN NET ASSET VALUE, END
                  OF PERIOD   INCOME    INVESTMENTS     TRANSACTIONS     INCOME   TRANSACTIONS    INCOME      VALUE     OF PERIOD
                  --------- ---------- -------------- ---------------- ---------- ------------- ---------- ------------ ----------
<S>               <C>       <C>        <C>            <C>              <C>        <C>           <C>        <C>          <C>
                                                                                                      EMERGING MARKETS EQUITY FUND
 ---------------------------------------------------------------------------------------------------------------------------------
FOR THE PERIOD ENDED JANUARY 31, 1998
- -------------------------------------
1998 -- Class A
Shares(b).......   $10.00      $ --        $(0.11)         $(0.20)         --           --          --        $(0.31)     $9.69
1998 -- Class B
Shares(b).......    10.00        --         (0.11)          (0.20)         --           --          --         (0.31)      9.69
1998 -- Class C
Shares(b).......    10.00        --         (0.10)          (0.20)         --           --          --         (0.30)      9.70
1998 -- Institu-
tional
Shares(b).......    10.00      0.01         (0.11)          (0.20)         --           --          --         (0.30)      9.70
1998 -- Service
Shares(b).......    10.00        --         (0.11)          (0.20)         --           --          --         (0.31)      9.69
<CAPTION>
                                                                                              RATIOS ASSUMING NO
                                                                                               VOLUNTARY WAIVER
                                                                                                   OF FEES
                                                                                            OR EXPENSE LIMITATIONS
                                                                                           ---------------------------
                                                                               RATIO OF                 RATIO OF NET
                                                    NET ASSETS   RATIO OF   NET INVESTMENT  RATIO OF     INVESTMENT
                               PORTFOLIO  AVERAGE   AT END OF  NET EXPENSES INCOME (LOSS)  EXPENSES TO    LOSS TO
                    TOTAL      TURNOVER  COMMISSION   PERIOD    TO AVERAGE    TO AVERAGE   AVERAGE NET    AVERAGE
                  RETURN(A)      RATE       RATE    (IN 000S)   NET ASSETS    NET ASSETS     ASSETS      NET ASSETS
                  ------------ --------- ---------- ---------- ------------ -------------- ------------ --------------
<S>               <C>          <C>       <C>        <C>        <C>          <C>            <C>          <C>
 ---------------------------------------------------------------------------------------------------------------------------------
FOR THE PERIOD ENDED JANUARY 31, 1998
- -------------------------------------
1998 -- Class A
Shares(b).......    (3.10)%(d)   3.35%    $0.0005    $17,681       1.90%(c)      0.55%(c)     5.88%(c)     (3.43)%(c)
1998 -- Class B
Shares(b).......    (3.10)(d)    3.35      0.0005         64       2.41(c)       0.05(c)      6.39(c)      (3.93)(c)
1998 -- Class C
Shares(b).......    (3.00)(d)    3.35      0.0005         73       2.48(c)      (0.27)(c)     6.46(c)      (4.25)(c)
1998 -- Institu-
tional
Shares(b).......    (3.00)(d)    3.35      0.0005     19,120       1.30(c)       0.80(c)      5.28(c)      (3.18)(c)
1998 -- Service
Shares(b).......    (3.10)(d)    3.35      0.0005          2       2.72(c)      (0.05)(c)     6.70(c)      (4.03)(c)
</TABLE>
 ------------
 
 (a) Assumes investment at the net asset value at the beginning of the period,
     reinvestment of all dividends and distributions, a complete redemption of
     the investment at the net asset value at the end of the period and no
     sales or redemption charges. Total return would be reduced if a sales or
     redemption charge were taken into account.
 (b) Class A, Class B, Class C, Institutional and Service share activity
     commenced on December 15, 1997.
 (c) Annualized.
 (d) Not annualized.
 (e) Includes the balancing effect of calculating per share amounts.
 
 
 
 
                                       10
<PAGE>
 
<TABLE>
<CAPTION>
                                         INCOME FROM                         DISTRIBUTIONS TO
                                   INVESTMENT OPERATIONS(E)                    SHAREHOLDERS
                           ---------------------------------------- ----------------------------------
                                                      NET REALIZED                          FROM NET      NET
                                                     AND UNREALIZED                         REALIZED    INCREASE   NET
                 NET ASSET    NET      NET REALIZED    ON FOREIGN              IN EXCESS    GAIN ON    (DECREASE) ASSET
                  VALUE,   INVESTMENT AND UNREALIZED    CURRENCY     FROM NET    OF NET    INVESTMENT    IN NET   VALUE,
                 BEGINNING   INCOME   GAIN (LOSS) ON    RELATED     INVESTMENT INVESTMENT AND FUTURES    ASSET    END OF
                 OF PERIOD   (LOSS)    INVESTMENTS    TRANSACTIONS    INCOME     INCOME   TRANSACTIONS   VALUE    PERIOD
                 --------- ---------- -------------- -------------- ---------- ---------- ------------ ---------- ------
                                                                                                ASIA GROWTH FUND
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>            <C>        <C>        <C>          <C>        <C>
FOR THE YEAR ENDED JANUARY 31,
- ------------------------------
1998--Class A
Shares..........  $16.31     $  --        $(5.78)        $(2.12)      $   --     $(0.03)     $   --      $(7.93)  $8.38
1998--Class B
Shares..........   16.24      0.01         (5.79)         (2.12)          --      (0.03)         --       (7.93)   8.31
1998--Class C
Shares(b).......   15.73      0.01         (5.43)         (1.99)          --      (0.03)         --       (7.44)   8.29
1998--Institu-
tional Shares...   16.33      0.10         (5.83)         (2.13)       (0.03)        --          --       (7.89)   8.44
- ------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   16.49      0.06         (0.11)            --        (0.12)        --       (0.01)      (0.18)  16.31
1997--Class B
Shares(b).......   17.31     (0.05)        (0.48)            --        (0.51)     (0.03)         --       (1.07)  16.24
1997--Institu-
tional
Shares(b).......   16.61      0.04         (0.11)            --        (0.11)     (0.06)      (0.04)      (0.28)  16.33
- ------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares             13.31      0.17          3.44             --        (0.12)     (0.14)      (0.17)       3.18   16.49
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1995--Class A
Shares(b).......   14.18      0.11         (0.89)            --         0.01         --       (0.10)      (0.87)  13.31
<CAPTION>
                                                                                     RATIOS ASSUMING
                                                                                   NO VOLUNTARY WAIVER
                                                                                        OF FEES OR
                                                                                   EXPENSE LIMITATIONS
                                                                                  -----------------------
                                                     NET   RATIO OF   RATIO OF
                                                   ASSETS    NET        NET       RATIO OF    RATIO OF
                                                   AT END  EXPENSES  INVESTMENT   EXPENSES       NET
                                                     OF       TO       INCOME        TO      INVESTMENT
                              PORTFOLIO  AVERAGE   PERIOD  AVERAGE   (LOSS) TO    AVERAGE   INCOME (LOSS)
                   TOTAL      TURNOVER  COMMISSION   (IN     NET      AVERAGE       NET      TO AVERAGE
                 RETURN(A)      RATE     RATE(F)    000S)   ASSETS   NET ASSETS    ASSETS    NET ASSETS
                 ------------ --------- ---------- ------- --------- ------------ --------- -------------
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>          <C>       <C>        <C>     <C>       <C>          <C>       <C>
FOR THE YEAR ENDED JANUARY 31,
- ------------------------------
1998--Class A
Shares..........  (48.49)%     105.16%    $.0070   $87,437   1.75%      0.31%       1.99%        0.07%
1998--Class B
Shares..........  (48.70)      105.16      .0070     3,359   2.30      (0.29)       2.50        (0.49)
1998--Class C
Shares(b).......  (47.17)(d)   105.16      .0070       436   2.35(c)   (0.26)(c)    2.55(c)     (0.46)(c)
1998--Institu-
tional Shares...  (48.19)      105.16      .0070       874   1.11       0.87        1.31         0.67
- ------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   (1.01)       48.40      .0151   263,014   1.67       0.20        1.87         0.00
1997--Class B
Shares(b).......   (6.02)(d)    48.40      .0151     3,354   2.21(c)   (0.56)(c)    2.37(c)     (0.72)(c)
1997--Institu-
tional
Shares(b).......   (1.09)(d)    48.40      .0151    13,322   1.10(c)    0.54(c)     1.26(c)      0.38 (c)
- ------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares             26.49        88.80         --   205,539   1.77       1.05        2.02         0.80
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1995--Class A
Shares(b).......   (5.46)(d)    36.08         --   124,298   1.90(c)    1.83(c)     2.38(c)      1.35(c)
</TABLE>
- -----------
(a) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions, a complete redemption of
    the investment at the net asset value at the end of the period and no
    sales or redemption charges. Total return would be reduced if a sales or
    redemption charge were taken into account.
(b) Class A, Class B, Class C and Institutional share activity commenced on
    July 8, 1994, May 1, 1996, August 15, 1997 and February 2, 1996,
    respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
 
                                       11
<PAGE>
 
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
 
  The investment objectives and principal investment policies of each Fund are
described below. In particular, each Fund may employ certain currency
techniques to seek to hedge against currency exchange rate fluctuations or to
seek to increase total return. When used to seek to enhance return, these
management techniques are considered speculative. Such currency management
techniques involve risks different from those associated with investing solely
in securities of U.S. issuers quoted in U.S. dollars. To the extent that a
Fund is fully invested in foreign securities while also maintaining currency
positions, it may be exposed to greater combined risk. A Fund's net currency
positions may expose it to risks independent of its securities positions.
There can be no assurance that a Fund's investment objectives will be
achieved.
 
  The Investment Adviser may purchase for the Funds common stocks, preferred
stocks, interests in real estate investment trusts, convertible debt
obligations, convertible preferred stocks, bonds with attached warrants,
equity-related transferable securities, equity interests in trusts,
partnerships, joint ventures, limited liability companies and similar
enterprises, warrants and stock purchase rights ("equity securities"). In
choosing a Fund's securities, the Investment Adviser utilizes first-hand
fundamental research, including visiting company facilities to assess
operations and to meet decision-makers. The Investment Adviser may also use
macro analysis of numerous economic and valuation variables to anticipate
changes in company earnings and the overall investment climate. The Investment
Adviser is able to draw on the research and market expertise of the Goldman
Sachs Global Investment Research Department and other affiliates of the
Investment Adviser, as well as information provided by other securities
dealers. Equity securities in a Fund's portfolio will generally be sold when
the Investment Adviser believes that the market price fully reflects or
exceeds the securities' fundamental valuation or when other more attractive
investments are identified. Other investment practices and management
techniques, which involve certain risks are described under "Description of
Securities," "Risk Factors" and "Investment Techniques."
 
  Actively Managed Funds. The International Equity, Japanese Equity,
International Small Cap, Emerging Markets Equity and Asia Growth Funds are
managed using an active international approach, which utilizes a consistent
process of stock selection undertaken by portfolio management teams located
within each of the major investment regions, including Europe, Japan, Asia and
the United States. In selecting securities, the Investment Adviser uses a
long-term, bottom-up strategy based on first-hand fundamental research that is
designed to give broad exposure to the available opportunities while seeking
to add return primarily through stock selection. Equity securities for these
Funds are evaluated based on three key factors--the business, the management
and the valuation. The Investment Adviser ordinarily seeks securities that
have, in the Investment Adviser's opinion, superior earnings growth potential,
sustainable franchise value with management attuned to creating shareholder
value and relatively discounted valuations. In addition, the Investment
Adviser uses a multi-factor risk model which seeks to assure that deviations
from the benchmark are justifiable.
 
  Quantitative Style Fund. The CORE International Equity Fund is managed using
both quantitative and fundamental techniques. CORE is an acronym for
"Computer-Optimized, Research-Enhanced," which reflects the CORE International
Equity Fund's investment process. This investment process and the proprietary
multifactor models used to implement it are discussed below.
 
  Investment Process. The Investment Adviser begins with a broad universe of
foreign equity securities for the CORE International Equity Fund. As described
more fully below, the Investment Adviser uses proprietary
 
                                      12
<PAGE>
 
multifactor models (each a "Multifactor Model") to forecast the returns of
different markets, currencies and individual securities. The Investment
Adviser may rely on research from both the Goldman Sachs Global Investment
Research Department (the "Research Department") and other industry sources.
 
  In building a diversified portfolio for the CORE International Equity Fund,
the Investment Adviser utilizes optimization techniques to seek to maximize
the Fund's expected return, while maintaining a risk profile similar to the
Fund's benchmark. The Fund's portfolio is primarily composed of securities
rated highest by the foregoing investment process and has risk characteristics
and industry weightings similar to the Fund's benchmark.
 
  Multifactor Models. The Multifactor Models are rigorous computerized rating
systems for forecasting the returns of different equity markets, currencies,
and individual equity securities according to fundamental investment
characteristics. The CORE International Equity Fund uses multiple Multifactor
Models to forecast returns. Currently, the CORE International Equity Fund uses
one model to forecast equity market returns, one model to forecast currency
returns and 22 separate models to forecast individual equity security returns
in 22 different countries. Despite this variety, all Multifactor Models
incorporate common variables covering measures of value, growth, momentum and
risk (e.g., book/price ratio, earnings/price ratio, price momentum, price
volatility, consensus growth forecasts, earnings estimate revisions, earnings
stability, currency momentum and country political risk ratings). All of the
factors used in the Multifactor Models have been shown to significantly impact
the performance of the securities, currencies and markets they were designed
to forecast.
 
  Because they include many disparate factors, the Investment Adviser believes
that all the Multifactor Models are broader in scope and provide a more
thorough evaluation than most conventional quantitative models. Securities and
markets ranked highest by the relevant Multifactor Model do not have one
dominant investment characteristic; rather, they possess an attractive
combination of investment characteristics.
 
  Research Department. In assigning ratings to equity securities, the Research
Department uses a four category rating system ranging from "recommended for
purchase" to "likely to underperform." The ratings reflect the analyst's
judgment as to the investment results of a specific security and incorporate
economic outlook, valuation, risk and a variety of other factors.
 
  By employing both a quantitative (i.e., the Multifactor Models) and a
qualitative (i.e., research enhanced) method of selecting securities, the CORE
International Equity Fund seeks to capitalize on the strengths of each
discipline.
 
 CORE INTERNATIONAL EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital. The Fund seeks to achieve its objective through a
broadly diversified portfolio of large cap equity securities of companies that
are organized outside the United States or whose securities are primarily
traded outside the United States.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities of companies that are
organized outside the United States or whose securities are principally traded
outside the United States. The Fund seeks broad representation of large cap
issuers across major countries and sectors of the international economy. The
Fund's investments are selected using both a variety of quantitative
 
                                      13
<PAGE>
 
techniques and fundamental research in seeking to maximize the Fund's expected
return, while maintaining risk, style, capitalization and industry
characteristics similar to the EAFE Index. In addition, the Fund seeks a
portfolio composed of companies with attractive valuations and stronger
momentum characteristics than the EAFE Index.
 
  The Fund may allocate its assets among countries as determined by the
Investment Adviser from time to time, provided the Fund's assets are invested
in at least three foreign countries. The Fund may invest in securities of
issuers in Emerging Countries which involve certain risks, as described below
under "Risk Factors--Special Risks of Investments in the Asian and Other
Emerging Markets," which are not present in investments in more developed
countries.
 
  For a description of the investment process of the Fund, see "Investment
Objectives and Policies--Quantitative Style Fund."
 
  Other. The Fund may invest only in fixed-income securities that are
considered to be cash equivalents.
 
 INTERNATIONAL EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal circumstances,
substantially all, and at least 65%, of its total assets in equity securities
of companies that are organized outside the United States or whose securities
are principally traded outside the United States. The Fund may allocate its
assets among countries as determined by the Investment Adviser from time to
time provided that the Fund's assets are invested in at least three foreign
countries. The Fund expects to invest a substantial portion of its assets in
the securities of issuers located in the developed countries of Western Europe
and in Japan. However, the Fund may also invest in the securities of issuers
located in Australia, Canada, New Zealand and the Emerging Countries in which
the Emerging Markets Equity Fund may invest. Many of the countries in which
the Fund may invest have emerging markets or economies which involve certain
risks, as described below under "Risk Factors--Special Risks of Investments in
the Asian and Other Emerging Markets," which are not present in investments in
more developed countries. The Fund intends to invest in companies with public
stock market capitalizations that are larger than those in which the
International Small Cap Fund primarily intends to invest.
 
  Other. Up to 35% of the Fund's total assets may be invested in fixed-income
securities.
 
 JAPANESE EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal circumstances,
substantially all, and at least 65%, of its total assets in equity securities
of Japanese companies. Japanese companies include those organized under the
laws of Japan or whose shares are traded primarily on a Japanese stock
exchange as well as those whose shares are registered with the Japan
Securities Dealers Association for trading primarily on Japan's over-the-
counter market. The Fund's concentration in Japanese companies will expose it
to the risk of adverse social, political and economic events which occur in
Japan or affect the Japanese markets as described under "Risk Factors--Special
Risks of Investment in the Japanese Markets."
 
                                      14
<PAGE>
 
  Other. The Fund may invest in the aggregate up to 35% of its total assets in
equity securities of non-Japanese companies and in fixed-income securities.
 
 INTERNATIONAL SMALL CAP FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal market
circumstances, substantially all, and at least 65%, of its total assets in
equity securities of companies with public stock market capitalizations of
$1 billion or less at the time of investment that are organized outside the
U.S. or whose securities are principally traded outside the U.S. The Fund may
allocate its assets among countries as determined by the Investment Adviser
from time to time provided that the Fund's assets are invested in at least
three foreign countries. The Fund expects to invest a substantial portion of
its assets in small cap securities of companies in the developed countries of
Western Europe, Japan and Asia. However, the Fund may also invest in the
securities of issuers located in Australia, Canada, New Zealand and the
Emerging Countries in which the Emerging Markets Equity Fund may invest. Many
of the countries in which the Fund may invest have emerging markets or
economics which involve certain risks, as described below under "Risk
Factors--Special Risks of Investments in Asian and Other Emerging Markets,"
which are not present in investments in more developed countries. If the
market capitalization of a company held by the Fund increases above $1
billion, the Fund may, consistent with its investment objective, continue to
hold the security.
 
  Other. The Fund may invest in the aggregate up to 35% of its total assets in
equity securities of larger cap companies with public stock market
capitalizations of more than $1 billion at the time of investment and in
fixed-income securities.
 
 EMERGING MARKETS EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal market
circumstances, substantially all, and at least 65%, of its total assets in
equity securities of Emerging Country issuers. For purposes of the Fund's
investment policies, Emerging Countries are countries with economies or
securities markets that are considered by the Investment Adviser not to be
fully developed. The Investment Adviser may consider classifications by the
World Bank, the International Finance Corporation or the United Nations and
its agencies in determining whether a country is emerging or developed.
Currently, Emerging Countries include among others, most Latin American,
African, Asian and Eastern European nations. The Investment Adviser currently
intends that the Fund's investment focus will be in the following Emerging
Countries: Argentina, Botswana, Brazil, Chile, China, Colombia, the Czech
Republic, Egypt, Greece, Hong Kong, Hungary, India, Indonesia, Israel, Jordan,
Kenya, Malaysia, Mexico, Morocco, Pakistan, Peru, the Philippines, Poland,
Portugal, Russia, Singapore, South Africa, South Korea, Sri Lanka, Taiwan,
Thailand, Turkey, Venezuela and Zimbabwe.
 
  An Emerging Country issuer is any entity that satisfies at least one of the
following criteria: (i) it derives 50% or more of its total revenue from goods
produced, sales made or services performed in one or more Emerging Countries;
(ii) it is organized under the laws of, or has a principal office in, an
Emerging Country; (iii) it maintains 50% or more of its assets in one or more
of the Emerging Countries; or (iv) the principal securities trading market for
a class of its securities is in an Emerging Country.
 
                                      15
<PAGE>
 
  Investments in Emerging Countries involve certain risks as described under
"Risk Factors--Special Risks of Investments in the Asian and Other Emerging
Markets," which are not present in investments in more developed countries.
The Fund may purchase privately placed equity securities, equity securities of
companies that are in the process of being privatized by foreign governments,
securities of issuers that have not paid dividends on a timely basis, equity
securities of issuers that have experienced difficulties, and securities of
companies without performance records.
 
  Other. Under normal circumstances, the Fund maintains investments in at
least six Emerging Countries, and will not invest more than 35% of its total
assets in securities of issuers in any one Emerging Country. Allocation of the
Fund's investments will depend upon the relative attractiveness of the
Emerging Country markets and particular issuers. In addition, macro-economic
factors and the portfolio managers' and Goldman Sachs economists' views of the
relative attractiveness of Emerging Countries and currencies are considered in
allocating the Fund's assets among Emerging Countries. Concentration of the
Fund's assets in one or a few Emerging Countries and currencies will subject
the Fund to greater risks than if the Fund's assets were not geographically
concentrated. See "Description of Securities--Foreign Transactions" and "Risk
Factors." The Fund may invest in the aggregate up to 35% of its total assets
in (i) fixed-income securities of private and governmental Emerging Country
issuers; and (ii) equity and fixed-income securities of issuers in developed
countries.
 
 ASIA GROWTH FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal market
circumstances, substantially all, and at least 65%, of its total assets in
equity securities of companies that satisfy at least one of the following
criteria: (i) their securities are traded principally on stock exchanges in
one or more of the Asian countries; (ii) they derive 50% or more of their
total revenue from goods produced, sales made or services performed in one or
more of the Asian countries; (iii) they maintain 50% or more of their assets
in one or more of the Asian countries; or (iv) they are organized under the
laws of one of the Asian countries. The Fund seeks to achieve its objective by
investing primarily in equity securities of Asian companies which are
considered by the Investment Adviser to have long-term capital appreciation
potential. Many of the countries in which the Fund may invest have emerging
markets or economies which involve certain risks as described under "Risk
Factors--Special Risks of Investments in the Asian and Other Emerging
Markets," which are not present in investments in more developed
countries. The Fund may purchase equity securities of issuers that have not
paid dividends on a timely basis, securities of companies that have
experienced difficulties, and securities of companies without performance
records.
 
  Other. The Fund may allocate its assets among the Asian countries as
determined from time to time by the Investment Adviser. For purposes of the
Fund's investment policies, Asian countries are China, Hong Kong, India,
Indonesia, Malaysia, Pakistan, the Philippines, Singapore, South Korea, Sri
Lanka, Taiwan and Thailand, as well as any other country in Asia (other than
Japan) to the extent that foreign investors are permitted by applicable law to
make such investments. Allocation of the Fund's investments will depend upon
the Investment Adviser's views of the relative attractiveness of the Asian
markets and particular issuers. For example, on January 31, 1998 (the end of
the Fund's last fiscal year), more than 35% of the Fund's assets were invested
in securities traded in Hong Kong. Concentration of the Fund's assets in one
or a few of the Asian countries and Asian currencies will subject the Fund to
greater risks than if the Fund's assets were not geographically concentrated.
See "Description of Securities--Foreign Investments." The Fund may invest in
the aggregate up to 35% of its total assets in equity securities of issuers in
other countries, including Japan, and in fixed-income securities.
 
                                      16
<PAGE>
 
 
                           DESCRIPTION OF SECURITIES
 
  The Funds may invest in equity and fixed income securities in accordance
with the investment policies stated above. Certain of these permitted
investments are described in more detail in this section.
 
CONVERTIBLE SECURITIES
 
  Each Fund may invest in convertible securities, including debt obligations
and preferred stock of the issuer convertible at a stated exchange rate into
common stock of the issuer. Convertible securities generally offer lower
interest or dividend yields than non-convertible securities of similar
quality. As with all fixed-income securities, the market value of convertible
securities tends to decline as interest rates increase and, conversely, to
increase as interest rates decline. However, when the market price of the
common stock underlying a convertible security exceeds the conversion price,
the convertible security tends to reflect the market price of the underlying
common stock. As the market price of the underlying common stock declines, the
convertible security tends to trade increasingly on a yield basis, and thus
may not decline in price to the same extent as the underlying common stock.
Convertible securities rank senior to common stocks in an issuer's capital
structure and consequently entail less risk than the issuer's common stock. In
evaluating a convertible security, the Investment Adviser will give primary
emphasis to the attractiveness of the underlying common stock. The convertible
securities in which the Funds invest are not subject to any minimum rating
criteria. Convertible debt securities are equity investments for purposes of
each Fund's investment policies.
 
FOREIGN INVESTMENTS
 
  FOREIGN SECURITIES. Each Fund will invest in the securities of foreign
issuers. Investments in foreign securities may offer potential benefits that
are not available from investments exclusively in equity securities of
domestic issuers quoted in U.S. dollars. Foreign countries may have economic
policies or business cycles different from those of the U.S. and markets for
foreign securities do not necessarily move in a manner parallel to U.S.
markets.
 
  Investing in the securities of foreign issuers involves certain special
risks, including those set forth below, which are not typically associated
with investing in U.S. dollar-denominated or quoted securities of U.S.
issuers. Such investments may be affected by changes in currency rates,
changes in foreign or U.S. laws or restrictions applicable to such investments
and in exchange control regulations (e.g., currency blockage). A decline in
the exchange rate of the currency (i.e., weakening of the currency against the
U.S. dollar) in which a portfolio security is quoted or denominated relative
to the U.S. dollar would reduce the value of the portfolio security. In
addition, if the currency in which a Fund receives dividends, interest or
other payments declines in value against the U.S. dollar before such income is
distributed as dividends to shareholders or converted to U.S. dollars, the
Fund may have to sell portfolio securities to obtain sufficient cash to pay
such dividends. The expected introduction of a single currency, the euro, on
January 1, 1999 for participating nations in the European Economic and
Monetary Union ("EU") presents unique uncertainties, including whether the
payment and operational systems of banks and other financial institutions will
be ready by the scheduled launch date; the creation of suitable clearing and
settlement payment systems for the new currency; the legal treatment of
certain outstanding financial contracts after January 1, 1999 that refer to
existing currencies rather than the euro; the establishment and maintenance of
exchange rates for currencies being converted into the euro and the euro; the
fluctuation of the euro relative to non-euro currencies during the transition
period from January 1, 1999 to December 31, 2000 and beyond; whether the
interest rate, tax and labor regimes of European countries participating in
the euro will converge over time; and whether the conversion of the currencies
of other EU
 
                                      17
<PAGE>
 
countries such as the United Kingdom, Denmark and Greece into the euro and the
admission of other non-EU countries such as Poland, Latvia and Lithuania as
members of the EU may have an impact on the euro. These or other factors,
including political and economic risks, could cause market disruptions before
or after the introduction of the euro, and could adversely affect the value of
securities held by the Funds. Commissions on transactions in foreign
securities may be higher than those for similar transactions on domestic stock
markets. In addition, clearance and settlement procedures may be different in
foreign countries and, in certain markets, such procedures have been unable to
keep pace with the volume of securities transactions, thus making it difficult
to conduct such transactions.
 
  Foreign issuers are not generally subject to uniform accounting, auditing
and financial reporting standards comparable to those applicable to U.S.
issuers. There may be less publicly available information about a foreign
issuer than about a U.S. issuer. In addition, there is generally less
government regulation of foreign markets, companies and securities dealers
than in the United States. Foreign securities markets may have substantially
less volume than U.S. securities markets and securities of many foreign
issuers are less liquid and more volatile than securities of comparable
domestic issuers. Furthermore, with respect to certain foreign countries,
there is a possibility of nationalization, expropriation or confiscatory
taxation, imposition of withholding or other taxes on dividend or interest
payments (or, in some cases, capital gains), limitations on the removal of
funds or other assets of the Funds, political or social instability or
diplomatic developments which could affect investments in those countries.
 
  Concentration of a Fund's assets in one or a few countries and currencies
will subject a Fund to greater risks than if a Fund's assets were not
geographically concentrated.
 
  INVESTMENTS IN ADRS, EDRS AND GDRS. Each Fund may invest in foreign
securities which take the form of sponsored and unsponsored American
Depository Receipts ("ADRs"), Global Depository Receipts ("GDRs"), European
Depository Receipts ("EDRs") or other similar instruments representing
securities of foreign issuers (together, "Depository Receipts"). ADRs
represent the right to receive securities of foreign issuers deposited in a
domestic bank or a correspondent bank. Prices of ADRs are quoted in U.S.
dollars, and ADRs are traded in the United States on exchanges or over-the-
counter and are sponsored and issued by domestic banks. EDRs and GDRs are
receipts evidencing an arrangement with a non-U.S. bank. EDRs and GDRs are not
necessarily quoted in the same currency as the underlying security. To the
extent a Fund acquires Depository Receipts through banks which do not have a
contractual relationship with the foreign issuer of the security underlying
the Depository Receipts to issue and service such Depository Receipts
(unsponsored Depository Receipts), there may be an increased possibility that
the Fund would not become aware of and be able to respond to corporate
actions, such as stock splits or rights offerings involving the foreign
issuer, in a timely manner. In addition, the lack of information may result in
inefficiencies in the valuation of such instruments. Investment in Depository
Receipts does not eliminate all the risks inherent in investing in securities
of non-U.S. issuers. The market value of Depository Receipts is dependent upon
the market value of the underlying securities and fluctuations in the relative
value of the currencies in which the Depository Receipt and the underlying
securities are quoted. However, by investing in Depository Receipts, such as
ADRs, that are quoted in U.S. dollars, a Fund may avoid currency risks during
the settlement period for purchases and sales.
 
  FOREIGN CURRENCY TRANSACTIONS. Because investment in foreign issuers will
usually involve currencies of foreign countries, and because each Fund may
have currency exposure independent of its securities positions, the value of
the assets of a Fund as measured in U.S. dollars will be affected by changes
in foreign currency exchange rates. A Fund may, to the extent it invests in
foreign securities, purchase or sell foreign currencies on a spot basis and
may also purchase or sell forward foreign currency exchange contracts for
hedging purposes and
 
                                      18
<PAGE>
 
to seek to protect against anticipated changes in future foreign currency
exchange rates. In addition, each Fund may enter into such contracts to seek
to increase total return when the Investment Adviser anticipates that the
foreign currency will appreciate or depreciate in value, but securities
denominated or quoted in that currency do not present attractive investment
opportunities and are not held in the Fund's portfolio. When entered into to
seek to enhance return, forward foreign currency exchange contracts are
considered speculative. Each Fund may also engage in cross-hedging by using
forward contracts in a currency different from that in which the hedged
security is denominated or quoted if the Investment Adviser determines that
there is a pattern of correlation between the two currencies. If a Fund enters
into a forward foreign currency exchange contract to buy foreign currency for
any purpose or to sell foreign currency to seek to increase total return, the
Fund will segregate cash or liquid assets in an amount equal to the value of
the Fund's total assets committed to the consummation of the forward contract,
or otherwise cover its position in a manner permitted by the SEC. The Fund
will incur costs in connection with conversions between various currencies. A
Fund may hold foreign currency received in connection with investments in
foreign securities when, in the judgment of the Investment Adviser, it would
be beneficial to convert such currency into U.S. dollars at a later date,
based on anticipated changes in the relevant exchange rate.
 
  Currency exchange rates may fluctuate significantly over short periods of
time causing, along with other factors, a Fund's NAV to fluctuate. Currency
exchange rates generally are determined by the forces of supply and demand in
the foreign exchange markets and the relative merits of investments in
different countries, actual or anticipated changes in interest rates and other
complex factors, as seen from an international perspective. Currency exchange
rates also can be affected unpredictably by the intervention of U.S. or
foreign governments or central banks, or the failure to intervene, or by
currency controls or political developments in the U.S. or abroad. To the
extent that a substantial portion of a Fund's total assets, adjusted to
reflect the Fund's net position after giving effect to currency transactions,
is denominated or quoted in the currencies of foreign countries, the Fund will
be more susceptible to the risk of adverse economic and political developments
within those countries.
 
  The market in forward foreign currency exchange contracts, currency swaps
and other privately negotiated currency instruments offers less protection
against defaults by the other party to such instruments than is available for
currency instruments traded on an exchange. Such contracts are subject to the
risk that the counterparty to the contract will default on its obligations.
Since these contracts are not guaranteed by an exchange or clearinghouse, a
default on the contract would deprive the Fund of unrealized profits,
transaction costs or the benefits of a currency hedge or force the Fund to
cover its purchase or sale commitments, if any, at the current market price. A
Fund will not enter into forward foreign currency exchange contracts, currency
swaps or other privately negotiated currency instruments unless the credit
quality of the unsecured senior debt or the claims-paying ability of the
counterparty is considered to be investment grade by the Investment Adviser.
 
  Each Fund may also engage in a variety of foreign currency management
techniques. However, due to the limited market for these instruments with
respect to the currencies of many Emerging Countries, including certain Asian
countries, the Investment Advisers do not currently anticipate that a
significant portion of International Equity, International Small Cap, Emerging
Markets Equity or Asia Growth Fund's currency exposure will be covered by such
instruments. For a discussion of such instruments and the risks associated
with their use, see "Investment Objective and Policies" in the Additional
Statement.
 
FIXED-INCOME SECURITIES
 
  Each Fund may invest in fixed-income securities, including U.S. Government
securities, corporate debt obligations, obligations issued by U.S. or foreign
banks (including without limitation, time deposits, bankers' acceptances and
certificates of deposit), mortgage-backed securities (including stripped
mortgage-backed securities) and asset-backed securities.
 
                                      19
<PAGE>
 
  Investments in fixed-income securities may include obligations of foreign
governments and governmental agencies, including those of Emerging Countries.
Investment in sovereign debt obligations involves special risks not present in
debt obligations of corporate issuers. The issuer of the debt or the
governmental authorities that control the repayment of the debt may be unable
or unwilling to repay principal or interest when due in accordance with the
terms of such debt, and a Fund may have limited recourse in the event of a
default. Periods of economic uncertainty may result in the volatility of
market prices of sovereign debt, and in turn a Fund's NAV, to a greater extent
than the volatility inherent in debt obligations of U.S. issuers. A sovereign
debtor's willingness or ability to repay principal and pay interest in a
timely manner may be affected by, among other factors, its cash flow
situation, the extent of its foreign currency reserves, the availability of
sufficient foreign exchange on the date a payment is due, the relative size of
the debt service burden to the economy as a whole, the sovereign debtor's
policy toward international lenders and the political constraints to which a
sovereign debtor may be subject.
 
  Fixed-income investments may also include investments in structured
securities. The value of the principal of and/or interest on such securities
is determined by reference to changes in the value of specific currencies,
interest rates, commodities, indices or other financial indicators (the
"Reference") or the relative change in two or more References. The interest
rate or the principal amount payable upon maturity or redemption may be
increased or decreased depending upon changes in the applicable Reference. The
terms of the structured securities may provide that in certain circumstances
no principal is due at maturity and, therefore, result in the loss of a Fund's
investment. Structured securities may be positively or negatively indexed, so
that appreciation of the Reference may produce an increase or decrease in the
interest rate or value of the security at maturity. In addition, changes in
the interest rates or the value of the security at maturity may be a multiple
of changes in the value of the Reference. Consequently, structured securities
may entail a greater degree of market risk than other types of fixed-income
securities. Structured securities may also be more volatile, less liquid and
more difficult to price accurately than less complex securities.
 
  Each Fund (other than the CORE International Equity Fund, which only invests
in debt instruments that are cash equivalents) may invest up to 35% of its
total assets in debt securities which are unrated or rated in the lowest
rating categories by Standard & Poor's Ratings Group ("Standard & Poor's") or
Moody's Investors Service, Inc. ("Moody's") (i.e., BB or lower by Standard &
Poor's or Ba or lower by Moody's), including securities rated D by Moody's or
Standard & Poor's. Fixed-income securities rated BB or Ba or below (or
comparable unrated securities) are commonly referred to as "junk bonds," are
considered predominately speculative and may be questionable as to principal
and interest payments. In some cases, such bonds may be highly speculative,
have poor prospects for reaching investment grade standing and be in default.
As a result, investment in such bonds will entail greater speculative risks
than those associated with investment in investment grade bonds. Also, to the
extent that the rating assigned to a security in a Fund's portfolio is
downgraded by a rating organization, the market price and liquidity of such
security may be adversely affected. See Appendix A to the Additional Statement
for a description of the corporate bond ratings assigned by Standard & Poor's
and Moody's.
 
REAL ESTATE INVESTMENT TRUSTS ("REITS")
 
  Each Fund may invest in REITs, which are pooled investment vehicles that
invest primarily in either real estate or real estate related loans. The value
of a REIT is affected by changes in the value of the properties owned by the
REIT or securing mortgage loans held by the REIT. REITs are dependent upon
cash flow from their investments to repay financing costs and the ability of
the REITs' managers. REITs are also subject to risks generally associated with
investments in real estate. A Fund will indirectly bear its proportionate
share of any expenses, including management fees, paid by a REIT in which it
invests.
 
                                      20
<PAGE>
 
 
                             INVESTMENT TECHNIQUES
 
 
OPTIONS ON SECURITIES AND SECURITIES INDICES
 
  Each Fund may write (sell) covered call and put options and purchase call
and put options on any securities in which it may invest or on any securities
index composed of securities in which it may invest. The writing and purchase
of options is a highly specialized activity which involves investment
techniques and risks different from those associated with ordinary portfolio
securities transactions. The use of options to seek to increase total return
involves the risk of loss if the Investment Adviser is incorrect in its
expectation of fluctuations in securities prices or interest rates. The
successful use of options for hedging purposes also depends in part on the
ability of the Investment Adviser to manage future price fluctuations and the
degree of correlation between the options and securities markets. If the
Investment Adviser is incorrect in its expectation of changes in securities
prices or determination of the correlation between the securities indices on
which options are written and purchased and the securities in a Fund's
investment portfolio, the investment performance of the Fund will be less
favorable than it would have been in the absence of such options transactions.
The writing of options could significantly increase a Fund's portfolio
turnover rate and, therefore, associated brokerage commissions or spreads.
 
OPTIONS ON FOREIGN CURRENCIES
 
  A Fund may, to the extent it invests in foreign securities, purchase and
sell (write) call and put options on foreign currencies for the purpose of
protecting against declines in the U.S. dollar value of foreign portfolio
securities and anticipated dividends on such securities and against increases
in the U.S. dollar cost of foreign securities to be acquired. In addition,
each Fund may use options on currency to cross-hedge, which involves writing
or purchasing options on one currency to hedge against changes in exchange
rates for a different currency, if there is a pattern of correlation between
the two currencies. As with other kinds of options transactions, however, the
writing of an option on a foreign currency will constitute only a partial
hedge, up to the amount of the premium received. If an option that a Fund has
written is exercised, the Fund could be required to purchase or sell foreign
currencies at disadvantageous exchange rates, thereby incurring losses. The
purchase of an option on foreign currency may constitute an effective hedge
against exchange rate fluctuations; however, in the event of exchange rate
movements adverse to a Fund's position, the Fund may forfeit the entire amount
of the premium plus related transaction costs. In addition to purchasing call
and put options for hedging purposes, each Fund may purchase call or put
options on currency to seek to increase total return when the Investment
Adviser anticipates that the currency will appreciate or depreciate in value,
but the securities quoted or denominated in that currency do not present
attractive investment opportunities and are not held in the Fund's portfolio.
When purchased or sold to seek to increase total return, options on currencies
are considered speculative. Options on foreign currencies written or purchased
by the Funds are traded on U.S. and foreign exchanges or over-the-counter.
 
FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS
 
  To seek to increase total return or to hedge against changes in interest
rates, securities prices or currency exchange rates, a Fund may purchase and
sell various kinds of futures contracts, and purchase and write call and put
options on any of such futures contracts. Each Fund may also enter into
closing purchase and sale transactions with respect to any such contracts and
options. The futures contracts may be based on various securities, foreign
currencies, securities indices and other financial instruments and indices,
whether domestic or foreign. A Fund will engage in futures and related options
transactions for bona fide hedging purposes as defined
 
                                      21
<PAGE>
 
in regulations of the Commodity Futures Trading Commission or to seek to
increase total return to the extent permitted by such regulations. A Fund may
not purchase or sell futures contracts or purchase or sell related options to
seek to increase total return, except for closing purchase or sale
transactions, if immediately thereafter the sum of the amount of initial
margin deposits and premiums paid on the Fund's outstanding positions in
futures and related options entered into for the purpose of seeking to
increase total return would exceed 5% of the market value of the Fund's net
assets. These transactions involve brokerage costs, require margin deposits
and, in the case of contracts and options obligating a Fund to purchase
securities or currencies, require the Fund to segregate and maintain cash or
liquid assets with a value equal to the amount of the Fund's obligations or to
otherwise cover the obligations in a manner permitted by the SEC.
 
  While transactions in futures contracts and options on futures may reduce
certain risks, such transactions themselves entail certain other risks. See
"Investment Objectives and Policies--Futures Contracts and Options on Future
Contracts" in the Additional Statement. Thus, while a Fund may benefit from
the use of futures and options on futures, unanticipated changes in interest
rates, securities prices or currency exchange rates may result in poorer
overall performance than if the Fund had not entered into any futures
contracts or options transactions. Because perfect correlation between a
futures position and portfolio position that is intended to be protected is
impossible to achieve, the desired protection may not be obtained and a Fund
may be exposed to risk of loss. The loss incurred by a Fund in entering into
futures contracts and in writing call options on futures is potentially
unlimited and may exceed the amount of the premium received. Futures markets
are highly volatile and the use of futures may increase the volatility of a
Fund's NAV. The profitability of a Fund's trading in futures to seek to
increase total return depends upon the ability of the Investment Adviser to
analyze correctly the futures markets. In addition, because of the low margin
deposits normally required in futures trading, a relatively small price
movement in a futures contract may result in substantial losses to a Fund.
Further, futures contracts and options on futures may be illiquid, and
exchanges may limit fluctuations in futures contract prices during a single
day. The Funds may engage in futures transactions on both U.S. and foreign
exchanges. Foreign exchanges may not provide the same protections as U.S.
exchanges.
 
EQUITY SWAPS
 
  Each Fund may invest up to 10% of its total assets in equity swaps. Equity
swaps allow the parties to a swap agreement to exchange the dividend income or
other components of return on an equity investment (e.g., a group of equity
securities or an index) for a component of return on another non-equity or
equity investment. An equity swap may be used by a Fund to invest in a market
without owning or taking physical custody of securities in circumstances in
which direct investment may be restricted for legal reasons or is otherwise
impractical. Equity swaps are derivatives and their value can be very
volatile. To the extent that the Investment Adviser does not accurately
analyze and predict the potential relative fluctuation of the components
swapped with another party, a Fund may suffer a loss. The value of some
components of an equity swap (such as the dividends on a common stock) may
also be sensitive to changes in interest rates. Furthermore, during the period
a swap is outstanding, a Fund may suffer a loss if the counterparty defaults.
In connection with its investments in equity swaps, a Fund will either
segregate cash or liquid assets or otherwise cover its obligations in a manner
required by the SEC.
 
WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS
 
  Each Fund may purchase when-issued securities. When-issued transactions
arise when securities are purchased by a Fund with payment and delivery taking
place in the future in order to secure what is considered to be an
advantageous price and yield to the Fund at the time of entering into the
transaction. Each Fund may
 
                                      22
<PAGE>
 
also purchase or sell securities on a forward commitment basis; that is, make
contracts to purchase or sell securities for a fixed price at a future date
beyond the customary settlement period. The purchase of securities on a when-
issued or forward commitment basis involves a risk of loss if the value of the
security to be purchased declines prior to the settlement date. Conversely,
securities sold on a forward commitment basis involve the risk that the value
of the securities to be sold may increase prior to the settlement date.
Although a Fund would generally purchase securities on a when-issued or
forward commitment basis with the intention of acquiring securities for its
portfolio, a Fund may dispose of when-issued securities or forward commitments
prior to settlement if the Investment Adviser deems it appropriate to do so. A
Fund will segregate cash or liquid assets in an amount sufficient to meet the
purchase price until three days prior to the settlement date. Alternatively,
each Fund may enter into offsetting contracts for the forward sale of other
securities that it owns.
 
ILLIQUID AND RESTRICTED SECURITIES
 
  A Fund will not invest more than 15% of its net assets in illiquid
investments, which include securities (both foreign and domestic) that are not
readily marketable, certain stripped mortgage-backed securities, repurchase
agreements maturing in more than seven days, time deposits with a notice or
demand period of more than seven days, certain over-the-counter options and
certain restricted securities, unless it is determined, based upon a review of
the trading markets for a specific restricted security, that such restricted
security is eligible for resale pursuant to Rule 144A under the Securities Act
of 1933 and, therefore, is liquid. The Trustees have adopted guidelines under
which the Investment Adviser determines and monitors the liquidity of
portfolio securities, subject to the oversight of the Trustees. Investing in
restricted securities eligible for resale pursuant to Rule 144A may decrease
the liquidity of a Fund's portfolio to the extent that qualified institutional
buyers become for a time uninterested in purchasing these restricted
securities. The purchase price and subsequent valuation of restricted and
illiquid securities normally reflect a discount, which may be significant,
from the market price of comparable securities for which a liquid market
exists.
 
REPURCHASE AGREEMENTS
 
  Each Fund may enter into repurchase agreements with dealers in U.S.
Government securities and member banks of the Federal Reserve System which
furnish collateral at least equal in value or market price to the amount of
their repurchase obligation. Each Fund may also enter into repurchase
agreements involving certain foreign government securities. If the other party
or "seller" defaults, a Fund might suffer a loss to the extent that the
proceeds from the sale of the underlying securities and other collateral held
by the Fund in connection with the related repurchase agreement are less than
the repurchase price. In addition, in the event of bankruptcy of the seller or
failure of the seller to repurchase the securities as agreed, a Fund could
suffer losses, including loss of interest on or principal of the security and
costs associated with delay and enforcement of the repurchase agreement. The
Trustees have reviewed and approved certain counterparties whom they believe
to be creditworthy and have authorized the Funds to enter into repurchase
agreements with such counterparties. In addition, each Fund, together with
other registered investment companies having management agreements with an
Investment Adviser or its affiliates, may transfer uninvested cash balances
into a single joint account, the daily aggregate balance of which will be
invested in one or more repurchase agreements.
 
LENDING OF PORTFOLIO SECURITIES
 
  Each Fund may also seek to increase its income by lending portfolio
securities. Under present regulatory policies, such loans may be made to
institutions, such as certain broker-dealers, and are required to be secured
continuously by collateral in cash, cash equivalents, or U.S. Government
securities maintained on a current basis in an amount at least equal to the
market value of the securities loaned. Cash collateral may be invested in cash
 
                                      23
<PAGE>
 
equivalents. If an Investment Adviser determines to make securities loans, the
value of the securities loaned may not exceed 33 1/3% of the value of the
total assets of a Fund (including the loan collateral). A Fund may experience
a loss or delay in the recovery of its securities if the institution with
which it has engaged in a portfolio loan transaction breaches its agreement
with the Fund.
 
SHORT SALES AGAINST-THE-BOX
 
  Each Fund (other than the CORE International Equity Fund) may make short
sales of securities or maintain a short position, provided that at all times
when a short position is open the Fund owns an equal amount of such securities
or securities convertible into or exchangeable for, without payment of any
further consideration, for an equal amount of the securities of the same
issuer as the securities sold short (a short sale against-the-box). Not more
than 25% of a Fund's net assets (determined at the time of the short sale) may
be subject to such short sales. As a result of recent tax legislation, short
sales may not generally be used to defer the recognition of gain for tax
purposes with respect to appreciated securities in a Fund's portfolio.
 
TEMPORARY INVESTMENTS
 
  Each Fund may, for temporary defensive purposes, invest 100% of its total
assets (except that the CORE International Equity Fund and Emerging Markets
Equity Fund may only hold up to 35% of their respective total assets) in U.S.
Government securities, repurchase agreements collateralized by U.S. Government
securities, commercial paper rated at least A-2 by Standard & Poor's or P-2 by
Moody's, certificates of deposit, bankers' acceptances, repurchase agreements,
non-convertible preferred stocks, non-convertible corporate bonds with a
remaining maturity of less than one year. When a Fund's assets are invested in
such instruments, the Fund may not be achieving its investment objective.
 
MISCELLANEOUS TECHNIQUES
 
  In addition to the techniques and investments described above, each Fund
may, with respect to no more than 5% of its net assets, engage in the
following techniques and investments: (i) warrants and stock purchase rights;
(ii) currency swaps; (iii) other investment companies including World Equity
Benchmark Shares and Standard & Poor's Depository Receipts; (iv) unseasoned
companies; and (v) custodial receipts.
 
  In addition, each Fund may borrow up to 33 1/3% of its total assets from
banks for temporary or emergency purposes. A Fund may not make additional
investments if borrowings exceed 5% of its total assets. For more information,
see the Additional Statement.
 
 
                                 RISK FACTORS
 
  RISKS OF INVESTING IN EQUITY SECURITIES. In general, the Funds are subject
to the risks associated with investments in common stocks and other equity
securities. Stock values fluctuate in response to the activities of individual
companies and in response to general market and economic conditions and,
accordingly, the value of the stocks that a Fund holds may decline over short
or extended periods. Stock markets tend to be cyclical, with periods when
stock prices generally rise and periods when prices generally decline. As of
the date of this Prospectus, certain foreign stock markets were trading at or
close to record high levels and there can be no guarantee that such levels
will continue.
 
                                      24
<PAGE>
 
  RISKS OF INVESTING IN SMALL CAPITALIZATION COMPANIES. Investing in the
securities of such companies involves greater risk and the possibility of
greater portfolio price volatility. Historically, small market capitalization
stocks and stocks of recently organized companies have been more volatile in
price than larger market capitalization stocks included in the S&P 500 Index.
Among the reasons for the greater price volatility of these small company and
unseasoned stocks are the less certain growth prospects of smaller firms, less
institutional investor interest and the lower degree of liquidity in the
markets for such stocks.
 
  SPECIAL RISKS OF INVESTMENTS IN THE ASIAN AND OTHER EMERGING
MARKETS. Investing in the securities of issuers in Emerging Countries involves
risks in addition to those discussed under "Description of Securities--
Foreign Investments." The International Equity, International Small Cap,
Emerging Markets Equity and Asia Growth Funds may each invest without limit in
the securities of issuers in Emerging Countries. The CORE International Equity
Fund may invest up to 25% of its total assets in securities of issuers in
Emerging Countries. Emerging Countries are generally located in the Asia-
Pacific region, Eastern Europe, Latin and South America and Africa. A Fund's
purchase and sale of portfolio securities in certain Emerging Countries may be
constrained by limitations as to daily changes in the prices of listed
securities, periodic trading or settlement volume and/or limitations on
aggregate holdings of foreign investors. Such limitations may be computed
based on the aggregate trading volume by or holdings of a Fund, the Investment
Adviser, its affiliates and their respective clients and other service
providers. A Fund may not be able to sell securities in circumstances where
price, trading or settlement volume limitations have been reached.
 
  Foreign investment in the securities markets of certain Emerging Countries
is restricted or controlled to varying degrees which may limit investment in
such Countries or increase the administrative costs of such investments. For
example, certain Asian countries require governmental approval prior to
investments by foreign persons or limit investment by foreign persons to only
a specified percentage of an issuer's outstanding securities or a specific
class of securities which may have less advantageous terms (including price)
than securities of the issuer available for purchase by nationals. In
addition, certain countries may restrict or prohibit investment opportunities
in issuers or industries deemed important to national interests. Such
restrictions may affect the market price, liquidity and rights of securities
that may be purchased by a Fund. The repatriation of both investment income
and capital from certain Emerging Countries is subject to restrictions such as
the need for governmental consents. Due to restrictions on direct investment
in equity securities in certain Asian countries, such as Taiwan, it is
anticipated that a Fund may invest in such countries only through other
investment funds in such countries. See "Other Investment Companies" in the
Additional Statement.
 
  Many Emerging Countries may be subject to a greater degree of economic,
political and social instability than is the case in Western Europe, the
United States, Canada, Australia, New Zealand and Japan. Many Emerging
Countries do not have fully democratic governments. For example, governments
of some Emerging Countries are authoritarian in nature or have been installed
or removed as a result of military coups, while governments in other Emerging
Countries have periodically used force to suppress civil dissent. Disparities
of wealth, the pace and success of democratization, and ethnic, religious and
racial disaffection, among other factors, have also led to social unrest,
violence and/or labor unrest in some Asian and other Emerging Countries.
Unanticipated political or social developments may affect the values of a
Fund's investments. Investing in Emerging Countries involves the risk of loss
due to expropriation, nationalization, confiscation of assets and property or
the imposition of restrictions on foreign investments and on repatriation of
capital invested. Starting in mid-1997 some Pacific region countries began to
experience currency devaluations that resulted in high interest rate levels
and sharp reductions in economic activity. This situation resulted in a
significant drop in the securities prices of companies located in the region.
Some countries have experienced government intervention,
 
                                      25
<PAGE>
 
have sought assistance from the International Monetary Fund and are undergoing
substantial domestic unrest. Although some countries are taking steps to
restructure their financial sectors in a manner that may facilitate a return
to long-term economic growth, there can be no assurance that these efforts
will be successful or that their current problems will not persist. At the end
of its last fiscal year, a substantial portion of the assets of the Asia
Growth Fund were invested in securities traded in the Hong Kong market. In
1997, the sovereignty of Hong Kong reverted from the United Kingdom to China.
Although Hong Kong is, by law, to maintain a high degree of autonomy, there
can also be no assurance that the general economic position of Hong Kong will
not be adversely affected as a result of the exercise of Chinese sovereignty
over Hong Kong. In particular, business confidence in Hong Kong can be
significantly affected by political developments and statements by public
figures in China, which can in turn affect the performance of the securities
markets. In addition, the reversion of Hong Kong to China has created
uncertainty as to future currency valuations relative to the U.S. dollar. Any
future valuation changes could be adverse from the perspective of U.S.
investors.
 
  Economies in individual Emerging Countries may differ favorably or
unfavorably from the U.S. economy in such respects as growth of gross domestic
product, rates of inflation, currency valuation, capital reinvestment,
resource self-sufficiency and balance of payments positions. Many Emerging
Countries have experienced currency devaluations and substantial and, in some
cases, extremely high rates of inflation, which have a negative effect on the
economies and securities markets of such Emerging Countries. Economies in
Emerging Countries generally are dependent heavily upon commodity prices and
international trade and, accordingly, have been and may continue to be
affected adversely by the economies of their trading partners, trade barriers,
exchange controls, managed adjustments in relative currency values and other
protectionist measures imposed or negotiated by the countries with which they
trade.
 
  Brokerage commissions, custodial services and other costs relating to
investment in international securities markets generally are more expensive
than in the United States. A Fund's investment in Emerging Countries may also
be subject to withholding or other taxes, which may be significant and may
reduce the return from an investment in such country to the Fund. Settlement
procedures in Emerging Countries are frequently less developed and reliable
than those in the United States and may involve a Fund's delivery of
securities before receipt of payment for their sale. In addition, significant
delays are common in certain markets in registering the transfer of
securities. Settlement or registration problems may make it more difficult for
a Fund to value its portfolio securities and could cause the Fund to miss
attractive investment opportunities, to have a portion of its assets
uninvested or to incur losses due to the failure of a counterparty to pay for
securities the Fund has delivered or the Fund's inability to complete its
contractual obligations.
 
  Currently, there is no market or only a limited market for many of the
management techniques and instruments with respect to the currencies and
securities markets of the Emerging Countries. Consequently, there can be no
assurance that suitable instruments for hedging currency and market-related
risks will be available at the times when a Fund wishes to use them.
 
  SPECIAL RISKS OF INVESTMENTS IN THE JAPANESE MARKETS. The Japanese Equity
Fund invests primarily in equity securities of Japanese companies.
Accordingly, the Japanese Equity Fund's performance will be closely tied to
economic and market conditions in Japan, and may be more volatile than more
geographically diversified funds. Changes in regulatory, as well as tax or
economic, policy in Japan could significantly affect the Japanese securities
markets and, therefore, the Japanese Equity Fund's performance.
 
  Japan's economy, the second largest in the world, has grown substantially
over the last three decades. Since 1990, however, Japan's economic growth has
declined significantly, and is currently subject to deflationary
 
                                      26
<PAGE>
 
pressures. In addition to this economic downturn, Japan is undergoing
structural adjustments related to high wages and taxes, currency valuations
and structural rigidities. Japan has also been experiencing notable
uncertainty and loss of public confidence in connection with the reform of its
political process and the deregulation of its economy. These conditions
present risks to the Japanese Equity Fund and its ability to attain its
investment objective.
 
  Japan's economy is heavily dependent upon international trade, and is
especially sensitive to trade barriers and disputes. In particular, Japan
relies on large imports of agricultural products, raw materials and fuels. A
substantial rise in world oil or commodity prices, or a fall-off in Japan's
manufactured exports, could be expected to adversely affect Japan's economy.
In addition, Japan is vulnerable to earthquakes, volcanoes and other natural
disasters. As of the date of this Prospectus, Japan's banking industry
continued to suffer from non-performing loans, declining real estate values
and lower valuations of securities holdings.
 
  The Japanese securities markets are less regulated than the U.S. markets.
Evidence has emerged from time to time of distortion of market prices to serve
political or other purposes. Shareholders' rights are also not always equally
enforced.
 
  The common stocks of many Japanese companies trade at high price-earnings
ratios. Differences in accounting methods make it difficult to compare the
earnings of Japanese companies with those of companies in other countries,
especially the U.S. In general, however, reported net income in Japan is
understated relative to U.S. accounting standards and this is one reason
price-earnings ratios of the stocks of Japanese companies have tended
historically to be higher than those of U.S. stocks. In addition, Japanese
companies have tended to have higher growth rates than U.S. companies, and
Japanese interest rates have generally been lower than U.S. interest rates.
These factors have contributed to lower discount rates and higher price-
earnings ratios in Japan than in the U.S.
 
  During the recent past the average stock market prices of Japanese
companies, as measured by major indices such as the NIKKEI 225 Average, have
experienced a substantial decline. It is not possible to determine whether
this general decline will continue.
 
  RISKS OF INVESTING IN FIXED-INCOME SECURITIES. When interest rates decline,
the market value of fixed- income securities tends to increase. Conversely,
when interest rates increase, the market value of fixed income securities
tends to decline. Volatility of a security's market value will differ
depending upon the security's duration, the issuer and the type of instrument.
Investments in fixed-income securities are subject to the risk that the issuer
could default on its obligations and a Fund could sustain losses on such
investments. A default could impact both interest and principal payments.
 
  RISKS OF DERIVATIVE TRANSACTIONS. A Fund's transactions, if any, in options,
futures, options on futures, swaps, structured securities and currency
transactions involve certain risks, including a possible lack of correlation
between changes in the value of hedging instruments and the portfolio assets
(if any) being hedged, the potential illiquidity of the markets for derivative
instruments, the risks arising from margin requirements and related leverage
factors associated with such transactions. The use of these management
techniques to seek to increase total return may be regarded as a speculative
practice and involves the risk of loss if the Investment Adviser is incorrect
in its expectation of fluctuations in securities prices, interest rates or
currency prices. A Fund's use of certain derivative transactions may be
limited by the requirements of the Internal Revenue Code of 1986, as amended
(the "Code"), for qualification as a regulated investment company.
 
                                      27
<PAGE>
 
 
                            INVESTMENT RESTRICTIONS
 
  Each Fund is subject to certain investment restrictions that are described
in detail under "Investment Restrictions" in the Additional Statement.
Fundamental investment restrictions of a Fund cannot be changed without
approval of a majority of the outstanding shares of that Fund as defined in
the Additional Statement. Each Fund's investment objectives and all policies
not specifically designated as fundamental are non-fundamental and may be
changed without shareholder approval. If there is a change in a Fund's
investment objectives, shareholders should consider whether that Fund remains
an appropriate investment in light of their then current financial positions
and needs.
 
 
                              PORTFOLIO TURNOVER
 
  A high rate of portfolio turnover (100% or more) involves correspondingly
greater expenses which must be borne by a Fund and its shareholders. See
"Financial Highlights" for a statement of the historical portfolio turnover
rate of each Fund (other than the Japanese Equity and International Small Cap
Funds). It is anticipated that the annual portfolio turnover rates of the
Japanese Equity and International Small Cap Funds will generally not exceed
75%. The portfolio turnover rate is calculated by dividing the lesser of the
dollar amount of sales or purchases of portfolio securities by the average
monthly value of a Fund's portfolio securities, excluding securities having a
maturity at the date of purchase of one year or less. The Investment Adviser
will not consider the portfolio turnover rate a limiting factor in making
investment decisions for a Fund consistent with the Fund's investment
objectives and portfolio management policies.
 
 
                                  MANAGEMENT
 
TRUSTEES AND OFFICERS
 
  The Trustees are responsible for deciding matters of general policy and
reviewing the actions of the Investment Advisers, distributor and transfer
agent. The officers of the Trust conduct and supervise the Funds' daily
business operations. The Additional Statement contains information as to the
identity of, and other information about, the Trustees and officers of the
Trust.
 
INVESTMENT ADVISERS
 
  INVESTMENT ADVISERS. Goldman Sachs Asset Management, One New York Plaza, New
York, New York 10004, a separate operating division of Goldman Sachs, serves
as the investment adviser to the CORE International Equity Fund. Goldman Sachs
registered as an investment adviser in 1981. Goldman Sachs Asset Management
International, 133 Peterborough Court, London EC4A 2BB, England, an affiliate
of Goldman Sachs, serves as the investment adviser to the International
Equity, Japanese Equity, International Small Cap, Emerging Markets Equity and
Asia Growth Funds. Goldman Sachs Asset Management International became a
member of the Investment Management Regulatory Organisation Limited in 1990
and registered as an investment adviser in 1991. The Goldman Sachs Group,
L.P., which controls the Investment Advisers, has announced that it will
pursue an initial public offering of the firm during the fourth quarter of
1998; if the public offering is consummated, The Goldman Sachs Group, L.P.
will merge into the new public company, which will be called The Goldman Sachs
Group, Inc. As of July 24, 1998, GSAM and GSAMI, together with their
affiliates, acted as investment adviser or distributor for assets in excess of
$168 billion.
 
                                      28
<PAGE>
 
  Under a Management Agreement with each Fund, the applicable Investment
Adviser, subject to the general supervision of the Trustees, provides day-to-
day advice as to the Fund's portfolio transactions. Goldman Sachs has agreed
to permit the Funds to use the name "Goldman Sachs" or a derivative thereof as
part of each Fund's name for as long as a Fund's Management Agreement is in
effect.
 
  In performing its investment advisory services, each Investment Adviser,
while remaining ultimately responsible for the management of the Funds, is
able to draw upon the research and expertise of its asset management
affiliates for portfolio decisions and management with respect to certain
portfolio securities. In addition, the Investment Adviser will have access to
the research of, and certain proprietary technical models developed by,
Goldman Sachs and may apply quantitative and qualitative analysis in
determining the appropriate allocations among the categories of issuers and
types of securities.
 
  Under the Management Agreement, each Investment Adviser also: (i) supervises
all non-advisory operations of each Fund; (ii) provides personnel to perform
such executive, administrative and clerical services as are reasonably
necessary to provide effective administration of each Fund; (iii) arranges for
at each Fund's expense (a) the preparation of all required tax returns, (b)
the preparation and submission of reports to existing shareholders, (c) the
periodic updating of prospectuses and Additional Statements and (d) the
preparation of reports to be filed with the SEC and other regulatory
authorities; (iv) maintains each Fund's records; and (v) provides office space
and all necessary office equipment and services.
 
 FUND MANAGERS
 
 
<TABLE>
<CAPTION>
                                                              YEARS
                                                              PRIMARILY
           NAME AND TITLE          FUND RESPONSIBILITY        RESPONSIBLE FIVE YEAR EMPLOYMENT HISTORY
           --------------          -------------------        ----------- ----------------------------
  <C>                              <C>                        <C>         <S>
  Anna G. Antici                   Portfolio Manager--           Since      Ms. Antici joined the
   Vice President                  Emerging Markets              1998       Investment Adviser in
                                                                            1997. From 1974 to 1997,
                                                                            she was a Vice President
                                                                            for HSBC Asset
                                                                            Management, where she
                                                                            was a portfolio manager
                                                                            for emerging markets and
                                                                            head of the Latin
                                                                            American Department. In
                                                                            1993, she was a senior
                                                                            research analyst for
                                                                            Baring Securities.
- ------------------------------------------------------------------------------------------------------
  Robert A. Beckwitt               Senior Portfolio Manager--    Since      Mr. Beckwitt joined the
   Vice President and              Emerging Markets Equity       1997       Investment Adviser in
   Co-Head Emerging Market                                                  1996. From 1986 to 1996,
   Equities                                                                 he was Chief Investment
                                                                            Strategist-Portfolio
                                                                            Adviser to high net
                                                                            worth investors at
                                                                            Fidelity Investments.
- ------------------------------------------------------------------------------------------------------
  Guy P. de C. Bennett             Portfolio Manager--           Since      Mr. Bennett joined the
   Vice President                  International Equity          1997       Investment Adviser in
                                   Senior Portfolio Manager                 1996 and is also co-head
                                   Japanese Equity               1998       of GSAM's Japanese
                                                                            Equity Group in Tokyo.
                                                                            From 1984 to 1996, he
                                                                            was a portfolio manager
                                                                            and an Executive
                                                                            Director at CIN
                                                                            Management.
- ------------------------------------------------------------------------------------------------------
  Melissa Brown                    Senior Portfolio Manager--    Since      Ms. Brown joined the
   Vice President                  CORE International Equity     1998       Investment Adviser in
                                                                            1998. From 1984 to 1998,
                                                                            she was the director of
                                                                            Quantitative Equity
                                                                            Research and served on
                                                                            the Investment Policy
                                                                            Committee at Prudential
                                                                            Securities.
- ------------------------------------------------------------------------------------------------------
  Mark M. Carhart                  Senior Portfolio Manager--    Since      Mr. Carhart joined the
   Vice President                  CORE International Equity     1998       Investment Adviser in
                                                                            1997, as a member of the
                                                                            Quantitative Research
                                                                            and Risk Management
                                                                            team. From August 1995
                                                                            to September 1997, he
                                                                            was Assistant Professor
                                                                            of Finance at the
                                                                            Marshall School of
                                                                            Business at USC and a
                                                                            Senior Fellow of the
                                                                            Wharton Financial
                                                                            Institutions Center.
</TABLE>
 
 
                                      29
<PAGE>
 
 
<TABLE>
<CAPTION>
                                                  YEARS
                                                  PRIMARILY
     NAME AND TITLE    FUND RESPONSIBILITY        RESPONSIBLE FIVE YEAR EMPLOYMENT HISTORY
     --------------    -------------------        ----------- ----------------------------
  <C>                  <C>                        <C>         <S>
  Kent A. Clark        Senior Portfolio Manager--    Since      Mr. Clark joined the
   Vice President      CORE International Equity     1997       Investment Adviser in
                                                                1992.
- ------------------------------------------------------------------------------------------
  Ivor H. Farman       Portfolio Manager--           Since      Mr. Farman joined the
   Executive Director  International Equity          1996       Investment Adviser in
                                                                1996. From 1995 to 1996,
                                                                he was responsible for
                                                                originating and
                                                                marketing French equity
                                                                ideas at Exane in Paris.
                                                                From 1994 to 1995, he
                                                                was engaged in French
                                                                equity research and
                                                                marketing at Banque
                                                                Nationale de Paris and
                                                                Schroders in London.
- ------------------------------------------------------------------------------------------
  Paul Greener         Portfolio Manager--           Since      Mr. Greener joined the
   Associate           CORE International Equity     1998       Investment Adviser in
                                                                1996 as a member of the
                                                                U.K. and European Equity
                                                                Team responsible for
                                                                European general
                                                                retailers, business
                                                                services and technology
                                                                sectors. Prior to
                                                                joining GSAM, he was an
                                                                equity analyst for two
                                                                years at CIN Management.
- ------------------------------------------------------------------------------------------
  James P. Hordern     Portfolio Manager--           Since      Mr. Hordern joined the
   Executive Director  International Small Cap       1998       Investment Adviser in
                                                                1997. From 1991 to 1997,
                                                                he was an Assistant
                                                                Director and portfolio
                                                                manager at Mercury Asset
                                                                Management on the
                                                                European Specialist
                                                                Team.
- ------------------------------------------------------------------------------------------
  Raymond J. Iwanowski Portfolio Manager--           Since      Mr. Iwanowski joined the
   Vice President      CORE International Equity     1988       Investment Adviser in
                                                                1998. Prior to joining
                                                                the Investment Adviser,
                                                                he spent three years at
                                                                Salomon Brothers, where
                                                                he was a Vice President
                                                                and head of the Fixed
                                                                Derivatives Client
                                                                Research group.
- ------------------------------------------------------------------------------------------
  Robert C. Jones      Senior Portfolio Manager--    Since      Mr. Jones joined the
   Managing Director   CORE International Equity     1997       Investment Adviser in
                                                                1989. From 1987 to 1989,
                                                                he was the senior
                                                                quantitative analyst in
                                                                the Goldman, Sachs & Co.
                                                                Investment Research
                                                                Department.
- ------------------------------------------------------------------------------------------
  Shigeka Kouda        Portfolio Manager--           Since      Mr. Kouda joined the
   Vice President      Japanese Equity               1998       Investment Adviser in
                                                                1997. From 1992 to 1997,
                                                                he was at the Fixed
                                                                Income Division of
                                                                Goldman Sachs (Japan)
                                                                Limited, where he was
                                                                extensively involved in
                                                                emerging markets trading
                                                                as well as International
                                                                Fixed Income
                                                                institutional sales.
- ------------------------------------------------------------------------------------------
  Ralf Laier           Portfolio Manager--           Since      Mr. Laier joined the
   Vice President      Emerging Markets              1998       Investment Adviser in
                                                                1997 and is a portfolio
                                                                manager with a focus on
                                                                Central/Eastern Europe
                                                                (CEE) and the
                                                                Commonwealth of
                                                                Independent States
                                                                (CIS). Prior to joining
                                                                the Investment Adviser,
                                                                from 1995 to 1997, he
                                                                was Vice President of
                                                                Soros Global Research
                                                                where he analyzed
                                                                investment opportunities
                                                                in CEE/CI. From 1994 to
                                                                1995, he achieved a
                                                                Ph.D. from the Academy
                                                                of Economics in Pozan,
                                                                Poland, and from 1992 to
                                                                1994 he worked for the
                                                                Polish Ministry of
                                                                Privatization as a
                                                                Project Director
                                                                developing privatization
                                                                strategies for several
                                                                industry sectors.
- ------------------------------------------------------------------------------------------
</TABLE>
 
 
                                       30
<PAGE>
 
 
<TABLE>
<CAPTION>
                                                     YEARS
                                                     PRIMARILY
      NAME AND TITLE      FUND RESPONSIBILITY        RESPONSIBLE FIVE YEAR EMPLOYMENT HISTORY
      --------------      -------------------        ----------- ----------------------------
  <C>                     <C>                        <C>         <S>
  Alice Lui               Portfolio Manager--           Since      Ms. Lui joined the
   Vice President         Asia Growth                   1994       Investment Adviser
                                                                   in 1990. Prior to 1990,
                                                                   she was a management
                                                                   consultant with Andersen
                                                                   Consulting in Hong Kong.
- ---------------------------------------------------------------------------------------------
  Shogo Maeda             Portfolio Manager--           Since      Mr. Maeda joined the
   Managing Director      International Equity          1994       Investment Adviser in
                          International Small Cap       1998       1994. From 1987 to 1994,
                          Senior Portfolio Manager--               he worked at Nomura
                          Japanese Equity               1998       Investment Management
                                                                   Incorporated as a Senior
                                                                   Portfolio Manager.
- ---------------------------------------------------------------------------------------------
  Susan Noble             Senior Portfolio Manager--    Since      Ms. Noble joined the
   Executive Director     International Equity          1998       Investment Adviser in
                                                                   October 1997 as Senior
                                                                   Portfolio Manager and
                                                                   head of the European
                                                                   Equity team. From 1986
                                                                   to 1997, she worked at
                                                                   Fleming Investment
                                                                   Management in London,
                                                                   where she most recently
                                                                   was Portfolio Management
                                                                   Director for the
                                                                   European equity
                                                                   investment strategy and
                                                                   process.
- ---------------------------------------------------------------------------------------------
  Warwick M. Negus        Senior Portfolio Manager--    Since      Mr. Negus joined the
   Managing Director and  Asia Growth                   1994       Investment Adviser in
   Co-Head Emerging       Portfolio Manager--                      1994. From 1987 to 1994,
   Market                 International Equity          1994       he was a Vice President
   Equities               Emerging Markets Equity       1997       of Bankers Trust
                          International Small Cap       1998       Australia Ltd where he
                                                                   was the Chief Investment
                                                                   Officer of their
                                                                   Southeast Asian
                                                                   investment team. He is
                                                                   also a member of Goldman
                                                                   Sachs Asset Management's
                                                                   global asset allocation
                                                                   committee.
- ---------------------------------------------------------------------------------------------
  Ebru Ozsezgin           Portfolio Manager--           Since      Ms. Ozsezgin joined the
   Vice President         Emerging Markets              1998       Investment Adviser in
                                                                   1997 and is a portfolio
                                                                   manager with a focus on
                                                                   the Mediterranean and
                                                                   Middle East region. From
                                                                   1996 to 1997, she was a
                                                                   portfolio manager at
                                                                   Foreign & Colonial,
                                                                   responsible for Middle
                                                                   East investments. From
                                                                   1994 to 1996, she was a
                                                                   fund manager with
                                                                   Framlington Investment
                                                                   Management. From 1990 to
                                                                   1994, she was a manager
                                                                   at Global Securities
                                                                   Ltd.
- ---------------------------------------------------------------------------------------------
  Victor H. Pinter        Senior Portfolio Manager--    Since      Mr. Pinter joined the
   Vice President         CORE International Equity     1997       Investment Adviser in
                                                                   1990. From 1985 to 1990,
                                                                   he was a project manager
                                                                   in the Information
                                                                   Technology Division of
                                                                   the Investment Adviser.
- ---------------------------------------------------------------------------------------------
  Ramakrishna Shankar     Portfolio Manager--           Since      Mr. Shankar joined the
   Vice President         Asia Growth                   1997       Investment Adviser in
                          Emerging Markets Equity       1998       1997. From July 1996 to
                                                                   1997, he worked for
                                                                   Goldman, Sachs & Co. in
                                                                   Singapore as a strategic
                                                                   advisor for transactions
                                                                   involving infrastructure
                                                                   industries in Asia. From
                                                                   1988 to 1996, he worked
                                                                   at Goldman, Sachs & Co.
                                                                   as an investment banker
                                                                   in the Investment
                                                                   Banking Division.
- ---------------------------------------------------------------------------------------------
  Miyako Shibamoto        Portfolio Manager--           Since      Ms. Shibamoto joined the
   Vice President         Japanese Equity               1998       Japanese Equity team in
                                                                   March 1998. From 1993 to
                                                                   1998, she was a Vice
                                                                   President at Scudder
                                                                   Stevens and Clark
                                                                   (Japan).
</TABLE>
 
 
                                       31
<PAGE>
 
 
<TABLE>
<CAPTION>
                                       YEARS
                                       PRIMARILY
   NAME AND TITLE  FUND RESPONSIBILITY RESPONSIBLE FIVE YEAR EMPLOYMENT HISTORY
   --------------  ------------------- ----------- ----------------------------
  <C>              <C>                 <C>         <S>
  Andrew Shrimpton Portfolio Manager--    Since      Mr. Shrimpton joined the
   Vice President  Emerging Markets       1998       Investment Adviser in
                                                     1996, and is a portfolio
                                                     manager with a focus on
                                                     Africa as well as the
                                                     financial industry in
                                                     the EMEA region. Prior
                                                     to joining the
                                                     Investment Adviser,
                                                     since 1985, he was a UK
                                                     equity analyst and
                                                     portfolio manager for
                                                     CIN Management, where he
                                                     initiated CIN
                                                     Management's first
                                                     investments in Latin
                                                     America.
- -------------------------------------------------------------------------------
  Robert Stewart   Portfolio Manager--    Since      Mr. Stewart joined the
   Vice President  Japanese Equity        1998       Investment Adviser in
                                                     1996. From 1994 to 1996,
                                                     he was at CIN Management
                                                     as a portfolio manager,
                                                     managing Japanese
                                                     equities.
- -------------------------------------------------------------------------------
  Takeya Suzuki    Portfolio Manager--    Since      Mr. Suzuki joined the
   Vice President  Japanese Equity        1998       Investment Adviser in
                                                     1996. From 1990 to 1996,
                                                     he was a Japanese equity
                                                     portfolio manager at
                                                     Nomura Investment
                                                     Management where he
                                                     actively managed assets
                                                     for U.S. pension funds.
</TABLE>
 
 
  It is the responsibility of the Investment Adviser to make the investment
decisions for a Fund and to place the purchase and sale orders for the Fund's
portfolio transactions in U.S. and foreign markets. Such orders may be
directed to any broker including, to the extent and in the manner permitted by
applicable law, Goldman Sachs or its affiliates. In effecting purchases and
sales of portfolio securities for the Funds, the Investment Adviser will seek
the best price and execution of a Fund's orders. In doing so, where two or
more brokers or dealers offer comparable prices and execution for a particular
trade, consideration may be given to whether the broker or dealer provides
investment research or brokerage services or sells Shares of any Goldman Sachs
Fund. See the Additional Statement for a further description of the Investment
Adviser's brokerage allocation practices.
 
  As compensation for its services rendered and assumption of certain expenses
pursuant to separate Management Agreements, GSAM and GSAMI are entitled to the
following fees, computed daily and payable monthly at the annual rates listed
below:
<TABLE>
<CAPTION>
                                                               FOR THE FISCAL
                                                CONTRACTUAL YEAR OR PERIOD ENDED
                                                   RATE*     JANUARY 31, 1998*
                                                ----------- --------------------
     <S>                                        <C>         <C>
     GSAM
    --------
     CORE International Equity ................    0.85%           0.75%
     GSAMI
    ---------
     International Equity......................    1.00%           0.90%
     Japanese Equity...........................    1.00%             N/A
     International Small Cap...................    1.20%             N/A
     Emerging Markets Equity...................    1.20%           1.10%
     Asia Growth...............................    1.00%           0.86%
</TABLE>
- ---------------------
*All numbers are annualized. The difference, if any, between the stated fees
and the actual fees paid by the Funds reflects that the applicable Investment
Adviser did not charge the full amount of the fees to which it would have been
entitled. Effective September 1, 1998, the management fee for the CORE
International Equity, International Equity, Emerging Markets Equity and Asia
Growth Funds will equal 0.85%, 1.00%, 1.20% and 1.00%, respectively.
 
                                      32
<PAGE>
 
  The Investment Adviser has voluntarily agreed to reduce or limit certain
"Other Expenses" of the Funds (excluding management fees, service fees,
transfer agency fees, taxes, interest and brokerage fees and litigation,
indemnification and other extraordinary expenses) to the extent such expenses
exceed 0.12%, 0.10%, 0.01%, 0.16%, 0.15% and 0.16% per annum of the average
daily net assets of the CORE International Equity, International Equity,
Japanese Equity, International Small Cap, Emerging Markets Equity and Asia
Growth Funds, respectively. Such reductions or limits, if any, may be
discontinued or modified by the applicable Investment Adviser in its
discretion at any time.
 
  ACTIVITIES OF GOLDMAN SACHS AND ITS AFFILIATES AND OTHER ACCOUNTS MANAGED BY
GOLDMAN SACHS. The involvement of the Investment Adviser, Goldman Sachs and
their affiliates in the management of, or their interest in, other accounts
and other activities of Goldman Sachs may present conflicts of interest with
respect to a Fund or limit a Fund's investment activities. Goldman Sachs and
its affiliates engage in proprietary trading and advise accounts and funds
which have investment objectives similar to those of the Funds and/or which
engage in and compete for transactions in the same type of securities,
currencies and instruments as the Funds. Goldman Sachs and its affiliates will
not have any obligation to make available any information regarding their
proprietary activities or strategies, or the activities or strategies used for
other accounts managed by them, for the benefit of the management of the
Funds. The results of a Fund's investment activities, therefore, may differ
from those of Goldman Sachs and its affiliates and it is possible that a Fund
could sustain losses during periods in which Goldman Sachs and its affiliates
and other accounts achieve significant profits on their trading for
proprietary or other accounts. In addition, the Funds may, from time to time,
enter into transactions in which other clients of Goldman Sachs have an
adverse interest. From time to time, a Fund's activities may be limited
because of regulatory restrictions applicable to Goldman Sachs and its
affiliates, and/or their internal policies designed to comply with such
restrictions. See "Management--Activities of Goldman Sachs and its Affiliates
and Other Accounts Managed by Goldman Sachs" in the Additional Statement for
further information.
 
DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs, 85 Broad Street, New York, New York 10004, serves as the
exclusive distributor (the "Distributor") of each Fund's Shares. Goldman
Sachs, 4900 Sears Tower, Chicago, Illinois 60606, also serves as each Fund's
transfer agent (the "Transfer Agent") and as such performs various shareholder
servicing functions. Shareholders with inquiries regarding a Fund should
contact Goldman Sachs (as Transfer Agent) at the address or the telephone
number set forth on the back cover page of this Prospectus. Goldman Sachs is
entitled to receive a transfer agency fee with respect to each Fund's
Institutional and Service Shares equal, on an annual basis, to 0.04% of
average daily net assets.
 
  From time to time, Goldman Sachs or any of its affiliates may purchase and
hold Shares of the Funds. Goldman Sachs reserves the right to redeem at any
time some or all of the Shares acquired for its own account.
 
YEAR 2000
 
  Many computer systems were designed using only two digits to signify the
year (for example, "98" for "1998"). On January 1, 2000, if these computer
systems are not corrected, they may incorrectly interpret "00" as the year
"1900" rather than the year "2000," leading to computer shutdowns or errors
(commonly known as the "Year 2000 Problem"). To the extent these systems
conduct forward-looking calculations, these computer problems may occur prior
to January 1, 2000. Like other investment companies and financial and business
organizations, the Funds could be adversely affected in their ability to
process securities trades, price securities, provide shareholder account
services and otherwise conduct normal business operations if the computer
systems
 
                                      33
<PAGE>
 
used by the Investment Adviser or other Fund service providers do not
adequately address this problem in a timely manner. The Investment Adviser has
established a dedicated group to analyze these issues and to implement the
systems modifications necessary to prepare for the Year 2000 Problem.
Currently, the Investment Adviser does not anticipate that the transition to
the 21st Century will have any material impact on its ability to continue to
service the Funds at current levels. In addition, the Investment Adviser has
sought assurances from the Funds' other service providers that they are taking
the steps necessary so that they do not experience Year 2000 Problems, and the
Investment Adviser will continue to monitor the situation. At this time,
however, no assurance can be given that the actions taken by the Investment
Adviser and the Funds' other service providers will be sufficient to avoid any
adverse effect on the Funds due to the Year 2000 Problem.
 
 
                                   EXPENSES
 
  The Funds are responsible for the payment of their expenses. The expenses
include, without limitation, the fees payable to the Investment Adviser;
custodial and transfer agency fees; service fees paid to Service
Organizations; brokerage fees and commissions; filing fees for the
registration or qualification of the Fund's Shares under federal or state
securities laws; organizational expenses; fees and expenses incurred in
connection with membership in investment company organizations; taxes;
interest; costs of liability insurance, fidelity bonds or indemnification, any
costs, expenses or losses arising out of any liability of, or claim for
damages or other relief asserted against, the Funds for violation of any law;
legal and auditing fees and expenses (including the cost of legal and certain
accounting services rendered by employees of the Investment Adviser and its
affiliates with respect to the Funds); expenses of preparing and setting in
type prospectuses, Additional Statements, proxy material, reports and notices
and the printing and distributing of the same to shareholders and regulatory
authorities; compensation and expenses of the Trust's "non-interested"
Trustees; and extraordinary organizational expenses, if any, incurred by the
Trust.
 
 
                                NET ASSET VALUE
 
  The NAV per Share of each Class of a Fund is calculated by the Fund's
custodian as of the close of regular trading on the New York Stock Exchange
(which is normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m. New York
time), on each Business Day (as such term is defined under "Additional
Information"). The NAV per share of each Class is calculated by determining
the net assets attributed to each Class and dividing by the number of
outstanding Shares of that Class. Portfolio securities are valued based on
market quotations or, if accurate quotations are not readily available, at
fair value as determined in good faith under procedures established by the
Trustees.
 
 
                            PERFORMANCE INFORMATION
 
  From time to time each Fund may publish average annual total return in
advertisements and communications to shareholders or prospective investors.
Average annual total return is determined by computing the average annual
percentage change in value of $1,000 invested at the maximum public offering
price for specified periods ending with the most recent calendar quarter,
assuming reinvestment of all dividends and distributions at NAV.
 
                                      34
<PAGE>
 
The total return calculation assumes a complete redemption of the investment
at the end of the relevant period. Each Fund may also from time to time
advertise total return on a cumulative, average, year-by-year or other basis
for various specified periods by means of quotations, charts, graphs or
schedules. In addition, each Fund may furnish total return calculations based
on investments at various sales charge levels or at NAV. Any performance data
which are based on the NAV per Share would be reduced if any applicable sales
charge were taken into account. In addition to the above, each Fund may from
time to time advertise its performance relative to certain averages,
performance rankings, indices, other information prepared by recognized mutual
fund statistical services and investments for which reliable performance
information is available.
 
  Each Fund's total return will be calculated separately for each Class of
Shares in existence. Because each Class of Shares may be subject to different
expenses, the total return calculations with respect to each Class of Shares
for the same period will differ. See "Shares of the Trust."
 
  The Funds' performance quotations do not reflect any fees charged by a
Service Organization to its customer accounts in connection with investments
in the Funds. The investment results of a Fund will fluctuate over time and
any presentation of investment results for any prior period should not be
considered a representation of what an investment may earn or what the Fund's
performance may be in any future period. In addition to information provided
in shareholder reports, the Funds may, in their discretion, from time to time
make a list of their holdings available to investors upon request.
 
 
                              SHARES OF THE TRUST
 
  Each Fund is a series of Goldman Sachs Trust, which was formed under the
laws of the State of Delaware on January 28, 1997. Each Fund (except the
Japanese Equity, International Small Cap and CORE International Equity Funds)
was formerly a series of Goldman Sachs Equity Portfolios, Inc., a Maryland
corporation, and was reorganized into the Trust as of April 30, 1997. The
Trustees have authority under the Trust's Declaration of Trust to create and
classify Shares of beneficial interests in separate series, without further
action by shareholders. Additional series may be added in the future. The
Trustees also have authority to classify and reclassify any series or
portfolio of Shares into one or more Classes. Information about the Trust's
other series and classes is contained in separate prospectuses.
 
  When issued, Shares are fully paid and non-assessable. In the event of
liquidation, shareholders of each class are entitled to share pro rata in the
net assets of the applicable Fund available for distribution to the
shareholders of such Class. All Shares, are freely transferable and have no
preemptive, subscription or conversion rights. Shareholders are entitled to
one vote per Share, provided that, at the option of the Trustees, shareholders
will be entitled to a number of votes based upon the NAVs represented by their
shares.
 
  As of April 3, 1998, Goldman Sachs CORE International Equity Fund Omnibus
A/C - Growth and Income Strategy, 4900 Sears Tower, Chicago, IL 60606, was
recordholder of 29.1% CORE International Equity Fund's outstanding shares.
 
  The Trust does not intend to hold annual meetings of shareholders. However,
recordholders may, under certain circumstances, as permitted by the Act,
communicate with other shareholders in connection with requiring a special
meeting of shareholders. The Trustees will call a special meeting of
shareholders for the purpose of electing Trustees if, at any time, less than a
majority of Trustees holding office at the time were elected by shareholders.
 
                                      35
<PAGE>
 
  In the interest of economy and convenience, the Trust does not issue
certificates representing the Funds' Shares. Instead, the Transfer Agent
maintains a record of each shareholder's ownership. Each shareholder receives
confirmation of purchase and redemption orders from the Transfer Agent. Fund
Shares and any dividends and distributions paid by the Funds are reflected in
account statements from the Transfer Agent.
 
 
                                   TAXATION
 
FEDERAL TAXES
 
  Each Fund is treated as a separate entity for tax purposes. The Japanese
Equity and International Small Cap Funds intend to elect and each other Fund
has elected to be treated as a regulated investment company, and each Fund
intends to continue to qualify for such treatment for each taxable year under
Subchapter M of the Code. To qualify as such, a Fund must satisfy certain
requirements relating to the sources of its income, diversification of its
assets and distribution of its income to shareholders. As a regulated
investment company, a Fund will not be subject to federal income or excise tax
on any net investment income and net realized capital gains that are
distributed to its shareholders in accordance with certain timing requirements
of the Code.
 
  Dividends paid by a Fund from net investment income, certain net realized
foreign exchange gains, the excess of net short-term capital gain over net
long-term capital loss and original issue discount or market discount income
will be taxable to shareholders as ordinary income. Distributions out of the
net capital gain (the excess of net long-term capital gain over net short-term
capital loss), if any, of a Fund will be taxed as long-term capital gain,
regardless of the length of time a shareholder has held Shares or whether such
gain was reflected in the price paid for the Shares. These tax consequences
will apply whether distributions are received in cash or reinvested in Shares.
A Fund's dividends that are paid to its corporate shareholders and are
attributable to qualifying dividends such Fund receives from U.S. domestic
corporations may be eligible, in the hands of such corporate shareholders, for
the corporate dividends-received deduction, subject to certain holding period
requirements and debt financing limitations under the Code. Dividends paid by
the Funds are not generally expected to qualify, in the hands of corporate
shareholders, for the corporate dividends-received deduction. Certain
distributions paid by a Fund in January of a given year may be taxable to
shareholders as if received the prior December 31. Shareholders will be
informed annually about the amount and character of distributions received
from the Funds for federal income tax purposes.
 
  Investors should consider the tax implications of buying Shares immediately
prior to a distribution. Investors who purchase Shares shortly before the
record date for a distribution will pay a per Share price that includes the
value of the anticipated distribution and will be taxed on the distribution
even though the distribution represents a return of a portion of the purchase
price.
 
  Redemptions and exchanges of Shares are taxable events.
 
  Individuals and certain other classes of shareholders may be subject to 31%
backup withholding of federal income tax on distributions, redemptions and
exchanges if they fail to furnish their correct taxpayer identification number
and certain certifications required by the Internal Revenue Service or if they
are otherwise subject to backup withholding. Individuals, corporations and
other shareholders that are not U.S. persons under the Code are subject to
different tax rules and may be subject to nonresident alien withholding at the
rate of 30% (or a lower rate provided by an applicable tax treaty, if any) on
amounts treated as ordinary dividends from the Funds.
 
                                      36
<PAGE>
 
  Each Fund may be subject to foreign withholding or other foreign taxes on
income or gain from certain foreign securities. The Funds may elect to pass
such foreign taxes through to their shareholders, who would then take such
taxes into account on their own tax returns. Alternatively, the Funds may
simply deduct such taxes in determining the amounts available for distribution
to shareholders. Generally, the Funds have taken the latter approach and
anticipate that they may continue to do so.
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local
or foreign taxes on payments received from the Funds. A state income (and
possibly local income and/or intangible property) tax exemption may be
available to the extent (if any) a Fund's distributions are derived from
interest on (or, in the case of intangible property taxes, the value of its
assets is attributable to) certain U.S. Government obligations, provided in
some states that certain thresholds for holdings of such obligations and/or
reporting requirements are satisfied. For a further discussion of certain tax
consequences of investing in Shares of the Funds, see "Taxation" in the
Additional Statement. Shareholders are urged to consult their own tax advisers
regarding specific questions as to federal, state and local taxes as well as
to any foreign taxes.
 
 
                            ADDITIONAL INFORMATION
 
  As used in this Prospectus, the term "Business Day" means any day the New
York Stock Exchange is open for trading, which is Monday through Friday except
for holidays. The New York Stock Exchange is closed on the following holidays:
New Year's Day, Dr. Martin Luther King, Jr. Day, Presidents' Day (observed),
Good Friday, Memorial Day (observed), Independence Day, Labor Day,
Thanksgiving Day and Christmas Day.
 
                                      37
<PAGE>
 
 
                              ADDITIONAL SERVICES
 
 
  The Trust, on behalf of the Funds, has adopted a Service Plan with respect to
the Service Shares which authorizes a Fund to compensate certain institutions
("Service Organizations") for providing account administration and personal and
account maintenance services to their customers who are beneficial owners of
such Shares. The Trust, on behalf of the Funds, enters into agreements with
Service Organizations which purchase Service Shares on behalf of their custom-
ers ("Service Agreements"). The Service Agreements provide for compensation to
the Service Organizations in an amount up to 0.50% (on an annualized basis) of
the average daily net assets of the Service Shares of the Fund attributable to
or held in the name of the Service Organization for its customers; provided,
however, that the fee paid for personal and account maintenance services may
not exceed 0.25% of such average daily net assets. The services provided by the
Service Organizations may include acting, directly or through an agent, as the
sole shareholder of record, maintaining account records for customers, process-
ing orders to purchase, redeem or exchange Service Shares for customers, re-
sponding to inquiries from prospective and existing shareholders and assisting
customers with investment procedures.
 
  The Trust may authorize certain Service Organizations to accept on the
Trust's behalf, purchase, redemption and exchange orders placed by their
customers and, if approved by the Trust, to designate other intermediaries to
accept such orders. In these cases, a Fund will be deemed to have received an
order in proper form when the order is accepted by the authorized Service
Organization or intermediary on a Business Day, and the order will be priced at
a Fund's NAV per Share next determined after such acceptance. The Service
Organization or intermediary will be responsible for transmitting accepted
orders to the Trust within the period agreed upon by them. A customer may
contact its Service Organization to learn whether the Service Organization is
authorized to accept orders. Service Organizations that are authorized to
accept orders for the Trust may receive payments from the Funds or Goldman
Sachs that are in addition to the payments payable by the Trust under the
Service Plan.
 
  Holders of Service Shares of a Fund bear all expenses and fees paid to Serv-
ice Organizations under the Service Plan as well as any other expenses which
are directly attributable to such Shares.
 
  Service Organizations may charge fees directly to their customers who are the
beneficial owners of Service Shares in connection with their customer accounts.
These fees would be in addition to any amounts received by the Service Organi-
zation under a Service Agreement and may affect the return earned on an invest-
ment in a Fund. The Trust, on behalf of the Funds, accrues payments made pursu-
ant to a Service Agreement daily. All inquiries of beneficial owners of Service
Shares should be directed to such owners' Service Organization.
 
  For the fiscal year ended January 31, 1998, the Trust paid the Service
Organizations fees at the annual rate of 0.50% of each Fund's average daily net
assets attributable to Service Shares for those Funds that had commenced
operations.
 
 
                            REPORTS TO SHAREHOLDERS
 
 
  Recordholders of Service Shares of the Funds will receive an annual report
containing audited financial statements and a semi-annual report. Each
recordholder of Service Shares will also be provided with a printed confirma-
tion for each transaction in its account and a quarterly account statement. A
year-to-date statement for any account will be provided to a Service Organiza-
tion upon request made to Goldman Sachs.
 
                                       38
<PAGE>
 
 
  Service Organizations will be responsible for providing services similar to
those described above to their customers who are the beneficial owners of such
Shares. For example, Service Organizations are responsible for providing each
customer exercising investment discretion with quarterly statements with re-
spect to such customer's account in lieu of an immediate confirmation of each
transaction.
 
 
                                   DIVIDENDS
 
 
  Each dividend from net investment income and capital gain distributions, if
any, declared by a Fund on its outstanding Service Shares will, at the election
of each shareholder, be paid (i) in cash or (ii) in additional Service Shares
of such Fund. This election should initially be made on a shareholder's Account
Information Form and may be changed upon written notice to Goldman Sachs at any
time prior to the record date for a particular dividend or distribution. If no
election is made, all dividends from net investment income and capital gain
distributions will be reinvested in Service Shares of the applicable Fund.
 
  The election to reinvest dividends and distributions paid by a Fund in addi-
tional Service Shares of the Fund will not affect the tax treatment of such
dividends and distributions, which will be treated as received by the share-
holder and then used to purchase Service Shares of a Fund.
 
  Each Fund intends that all or substantially all its net investment income and
net capital gains, after reduction by available capital losses, including any
capital losses carried forward from prior years, will be declared as dividends
for each taxable year. Each Fund will pay dividends from net investment income,
and dividends from net realized capital gains, reduced by available capital
losses, at least annually. From time to time, a portion of a Fund's dividends
may constitute a return of capital.
 
  At the time of an investor's purchase of Shares of a Fund, a portion of the
NAV per Share may be represented by undistributed income of the Fund or real-
ized or unrealized appreciation of the Fund's portfolio securities. Therefore,
subsequent distributions on such Shares from such income or realized apprecia-
tion may be taxable to the investor even if the NAV of the investor's Shares
is, as a result of the distributions, reduced below the cost of such Shares and
the distributions (or portions thereof) represent a return of a portion of the
purchase price.
 
 
                           PURCHASE OF SERVICE SHARES
 
 
  Customers of Service Organizations may invest in Service Shares only through
their Service Organizations. Service Shares may be purchased on any Business
Day at the NAV per Share next determined after receipt of an order by Goldman
Sachs from a Service Organization. (See "Additional Services" for a description
of limited situations where a Service Organization or other intermediary may be
authorized to accept orders for the Funds.) No sales load will be charged. Cur-
rently, the NAV is determined as of the close of regular trading on the New
York Stock Exchange (which is normally, but not always, 3:00 p.m. Chicago time,
4:00 p.m. New York time), as described under "Net Asset Value." Purchases of
Service Shares of the Funds must be settled within three (3) Business Days of
the receipt of a complete purchase order. Payment of the proceeds of redemption
of Shares purchased by check may be delayed for a period of time as described
under "Redemption of Service Shares."
 
                                       39
<PAGE>
 
 
  The Service Organizations are responsible for the timely transmittal of
purchase orders to Goldman Sachs and payments to State Street Bank and Trust
Company ("State Street"). In order to facilitate timely transmittal, the
Service Organizations have established times by which purchase orders and
payments must be received by them.
 
PURCHASE PROCEDURES
 
  Purchases of Service Shares may be made by a Service Organization placing an
order with Goldman Sachs at 800-621-2550 and either wiring federal funds to
State Street or initiating an ACH transfer. Purchases may also be made by a
Service Organization by check (except that the Trust will not accept a check
drawn on a foreign bank or a third party check) or Federal Reserve draft made
payable to "Goldman Sachs International Equity Funds--Name of Fund and Class of
Shares" and should be directed to "Goldman Sachs International Equity Funds--
Name of Fund and Class of Shares," c/o National Financial Data Services, Inc.
("NFDS"), P.O. Box 419711, Kansas City, MO 64141-6711.
 
OTHER PURCHASE INFORMATION
 
  The Funds do not have any minimum purchase or account requirements with
respect to Service Shares. A Service Organization may, however, impose a
minimum amount for initial and subsequent investments in Service Shares, and
may establish other requirements such as a minimum account balance. A Service
Organization may effect redemptions of noncomplying accounts, and may impose a
charge for any special services rendered to its customers. Customers should
contact their Service Organization for further information concerning such
requirements and charges.
 
  The Investment Adviser, Distributor, and/or their affiliates also pay
additional compensation, from time to time, out of their assets and not as an
additional charge to the Funds, to selected Service Organizations and other
persons in connection with the sale of Shares of the Funds and other investment
portfolios of the Trust (such as additional payments based on new sales amounts
exceeding pre-established thresholds, or the length of time customer assets
have remained in the Trust) and, subject to applicable NASD regulations,
contribute to various non-cash and cash incentive arrangements to promote the
sale of Shares, as well as sponsor various educational programs, sales contests
and/or promotions in which participants may receive reimbursement of expenses,
entertainment and prizes such as travel awards, merchandise, cash, investment
research and educational information and related support materials. This
additional compensation can vary among Service Organizations depending upon
such factors as the amounts their customers have invested (or may invest) in
particular investment portfolios of the Trust, the particular program involved,
or the amount of reimbursable expenses. Additional compensation based on sales
may, but is currently not expected to, exceed 0.50% (annualized) of the amount
invested. For further information, see the Additional Statement.
 
  The Funds reserve the right to redeem Service Shares of any Service Organiza-
tion whose account balance is less than $50 as a result of earlier redemptions.
Such redemptions will not be implemented if the value of a recordholder's ac-
count falls below the minimum account balance solely as a result of market con-
ditions. The Trust will give 60 days' prior written notice to Service Organiza-
tions whose Service Shares are being redeemed to allow them to purchase suffi-
cient additional Service Shares to avoid such redemption.
 
                                       40
<PAGE>
 
 
  The Funds and Goldman Sachs each reserve the right to reject any specific
purchase order (including exchanges) or to restrict purchases or exchanges by a
particular purchaser (or group of related purchasers). This may occur, for ex-
ample, when a purchaser or group of purchaser's pattern of frequent purchases,
sales or exchanges of Service Shares of a Fund is evident, or if purchases,
sales, or exchanges are, or a subsequent abrupt redemption might be, of a size
that would disrupt management of a Fund.
 
  In the sole discretion of Goldman Sachs, a Fund may accept securities instead
of cash for the purchase of Shares of the Fund. Such purchases will be
permitted only if the Investment Adviser determines that any securities
acquired in this manner are consistent with the Fund's investment objectives,
restrictions and policies and are desirable investments for the Fund.
 
 
                               EXCHANGE PRIVILEGE
 
 
  Service Shares of the Funds may be exchanged by a Service Organization for
(i) Service Shares of any other mutual fund sponsored by Goldman Sachs and des-
ignated as an eligible fund for this purpose; and (ii) the corresponding class
of any Goldman Sachs Money Market Fund at the NAV next determined either by
writing to Goldman Sachs, Attention: Goldman Sachs International Equity Funds--
Name of Fund and Class of Shares, c/o GSAM Shareholder Services, 4900 Sears
Tower, Chicago, Illinois 60606 or, if previously elected in the Fund's Account
Information Form, by telephone at 800-621-2550 (7:00 a.m. to 5:30 p.m. Chicago
time). A shareholder should obtain and read the prospectus relating to any
other fund and its Shares and consider its investment objective, policies and
applicable fees before making an exchange. Service Shares acquired by telephone
exchange must be registered in the same name(s) and have the same address as
Service Shares of the Fund for which the exchange is being made.
 
   In an effort to prevent unauthorized or fraudulent exchanges by telephone,
Goldman Sachs employs reasonable procedures as set forth under "Redemption of
Service Shares" to confirm that such instructions are genuine. In times of
drastic economic or market changes the telephone exchange privilege may be dif-
ficult to implement. For federal income tax purposes, an exchange is treated as
a sale of the Service Shares surrendered in the exchange, on which an investor
may realize a gain or loss, followed by a purchase of Service Shares or the
corresponding class of any Goldman Sachs Money Market Fund received in the ex-
change. Shareholders should consult their own tax advisers concerning the tax
consequences of an exchange. Exchanges are available only in states where ex-
changes may legally be made. The exchange privilege may be materially modified
or withdrawn at any time on 60 days' written notice to recordholders of Service
Shares and is subject to certain limitations. See "Purchase of Service Shares."
 
 
                          REDEMPTION OF SERVICE SHARES
 
 
  The Funds will redeem their Service Shares upon request of a recordholder of
such Shares on any Business Day at the NAV next determined after the receipt of
a request in proper form by Goldman Sachs. (See "Additional Services" for a de-
scription of limited situations where a Service Organization or other interme-
diary may
 
                                       41
<PAGE>
 
be authorized to accept requests for the Funds.) If Service Shares to be re-
deemed were recently purchased by check, a Fund may delay transmittal of re-
demption proceeds until such time as it has assured itself that good funds have
been collected for the purchase of such Service Shares. This may take up to 15
days. Redemption requests may be made by a Service Organization by writing to
or calling the Transfer Agent at the address or telephone number set forth on
the back cover of this Prospectus. A Service Organization may request redemp-
tions by telephone if the optional telephone redemption privilege is elected on
the Account Information Form. It may be difficult to implement redemptions by
telephone in times of drastic economic or market changes.
 
   In an effort to prevent unauthorized or fraudulent redemption or exchange
requests by telephone, Goldman Sachs employs reasonable procedures specified by
the Trust to confirm that such instructions are genuine. Among other things,
any redemption request that requires money to go to an account or address other
than that designated on the Account Information Form must be in writing and
signed by an authorized person designated on the Account Information Form. Any
such written request is also confirmed by telephone with both the requesting
party and the designated bank account to verify instructions. Exchanges among
accounts with different names, addresses and social security or other taxpayer
identification numbers must be in writing and signed by an authorized person
designated on the Account Information Form. Other procedures may be implemented
from time to time concerning telephone redemptions and exchanges. If reasonable
procedures are not implemented, the Trust may be liable for any loss due to
unauthorized or fraudulent transactions. In all other cases, neither the Funds,
the Trust nor Goldman Sachs will be responsible for the authenticity of
redemption or exchange instructions received by telephone.
 
  The Funds will arrange for the proceeds of redemptions effected by any means
to be wired to the recordholder of Service Shares or, if the recordholder
elects in writing, by check. Redemption proceeds paid by wire transfer will
normally be wired on the next Business Day in federal funds (for a total one-
day delay), but may be paid up to three days after receipt of a properly
executed redemption request. Wiring of redemption proceeds may be delayed one
additional Business Day if the Federal Reserve Bank is closed on the day
redemption proceeds would ordinarily be wired. Redemption proceeds paid by
check will normally be mailed to the address of record within three Business
Days of receipt of a properly executed redemption request. Once wire transfer
instructions have been given by Goldman Sachs, neither the Funds, the Trust nor
Goldman Sachs assumes any further responsibility for the performance of
intermediaries or the customer's Service Organization in the transfer process.
If a problem with such performance arises, the customer should deal directly
with such intermediaries or Service Organizations.
 
  Additional documentation regarding a redemption by any means may be required
to effect a redemption when deemed appropriate by the Transfer Agent. The
request for such redemption will not be considered to have been received in
proper form until such additional documentation has been submitted to the
Transfer Agent by the recordholder of Service Shares.
 
  Service Organizations are responsible for the timely transmittal of
redemption requests by their customers to the Transfer Agent. In order to
facilitate timely transmittal of redemption requests, Service Organizations
have established times by which redemption requests must be received by them.
Additional documentation may be required when deemed appropriate by a Service
Organization.
 
                              --------------------
 
                                       42
<PAGE>
 
 
                                  APPENDIX
 
 
 
   GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON ACCOUNT
                               INFORMATION FORM
 
  You are required by law to provide a Fund with your correct Taxpayer
Identification Number (TIN), regardless of whether you file tax returns.
Failure to do so may subject you to penalties. Failure to provide your correct
TIN and to sign your name in the Certification section of the Account
Information Form could result in withholding of 31% by a Fund for the federal
backup withholding tax on distributions, redemptions, exchanges and other
payments relating to your account.
 
  Any tax withheld may be credited against taxes owed on your federal income
tax return.
 
  If you do not have a TIN, you should apply for one immediately by contacting
your local office of the Social Security Administration or the Internal
Revenue Service (IRS). Backup withholding could also apply to payments
relating to your account prior to a Fund's receipt of your TIN.
 
  Special rules apply for certain entities. For example, for an account
established under a Uniform Gifts or Transfers to Minors Act, the TIN of the
minor should be furnished.
 
  If you have been notified by the IRS that you are subject to backup
withholding because you failed to report all your interest and/or dividend
income on your tax return and you have not been notified by the IRS that such
withholding should cease, you must cross out item (2) in the Certification
section of the Account Information Form.
 
  If you are an exempt recipient, you should furnish your TIN and certify your
exemption by signing the Certification section and writing "exempt" after your
signature. Exempt recipients include: corporations, tax-exempt pension plans
and IRAs, governmental agencies, financial institutions, registered securities
and commodities dealers and others.
 
  If you are a nonresident alien or foreign entity, you must provide a
completed Form W-8 to a Fund in order to avoid backup withholding on certain
payments. Other payments to you may be subject to nonresident alien
withholding of up to 30%.
 
  For further information regarding backup and nonresident alien withholding,
see Sections 3406, 1441 and 1442 of the Code and consult your tax adviser.
 
                                      A-1
<PAGE>
 
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS ASSET
MANAGEMENT
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN SACHS ASSET
MANAGEMENT INTERNATIONAL
133 PETERBOROUGH COURT
LONDON, ENGLAND EC4A 2BB
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR
85 BROAD STREET
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
TRANSFER AGENT
4900 SEARS TOWER
CHICAGO, ILLINOIS 60606
 
STATE STREET BANK AND TRUST COMPANY
CUSTODIAN
1776 HERITAGE DRIVE
NORTH QUINCY, MASSACHUSETTS 02171
 
ARTHUR ANDERSEN LLP
INDEPENDENT PUBLIC ACCOUNTANTS
225 FRANKLIN STREET
BOSTON, MASSACHUSETTS 02110
 
TOLL FREE (IN U.S.) . . . . . . . . 800-621-2550
 
EQINTLPROSVC
501415
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS
INTERNATIONAL
EQUITY FUNDS
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
 
SERVICE SHARES
 
 
 
LOGO
Goldman
Sachs
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
         GOLDMAN SACHS INTERNATIONAL EQUITY FUNDS INSTITUTIONAL SHARES
May 1, 1998, as revised September 1, 1998
 
GOLDMAN SACHS CORE INTERNATIONAL    GOLDMAN SACHS INTERNATIONAL
EQUITY FUND                         SMALL CAP FUND
 Seeks long-term growth of cap-       Seeks long-term capital appre-
 ital through a broadly diver-        ciation through investments in
 sified portfolio of equity se-       equity securities of companies
 curities of large cap compa-         with public stock market capi-
 nies that are organized out-         talizations of $1 billion or
 side the U.S. or whose securi-       less at the time of investment
 ties are principally traded          that are organized outside the
 outside the U.S.                     U.S. or whose securities are
                                      principally traded outside the
                                      U.S.
 
GOLDMAN SACHS INTERNATIONAL EQ-
UITY FUND
 Seeks long-term capital appre-     GOLDMAN SACHS EMERGING MARKETS
 ciation through investments in     EQUITY FUND
 equity securities of companies       Seeks long-term capital appre-
 that are organized outside the       ciation through investments in
 U.S. or whose securities are         equity securities of emerging
 principally traded outside the       country issuers.
 U.S.
 
                                    GOLDMAN SACHS ASIA GROWTH FUND
GOLDMAN SACHS JAPANESE EQUITY         Seeks long-term capital appre-
FUND                                  ciation through investments in
 Seeks long-term capital appre-       equity securities of companies
 ciation through investments in       related (in the manner de-
 equity securities of Japanese        scribed herein) to Asian coun-
 companies.                           tries.
 
                               -----------------
 
  Goldman Sachs Asset Management ("GSAM"), New York, New York, a separate
operating division of Goldman, Sachs & Co. ("Goldman Sachs"), serves as
investment adviser to the Goldman Sachs CORE International Equity Fund. Goldman
Sachs Asset Management International ("GSAMI"), London, England, an affiliate
of Goldman Sachs, serves as investment adviser to each other Fund. GSAM and
GSAMI are each referred to in this Prospectus as the "Investment Adviser."
Goldman Sachs serves as each Fund's distributor and transfer agent.
 
  This Prospectus provides information about Goldman Sachs Trust (the "Trust")
and the Funds that a prospective investor should understand before investing.
This Prospectus should be retained for future reference. A Statement of
Additional Information (the "Additional Statement"), dated May 1, 1998, as
revised September 1, 1998, containing further information about the Trust and
the Funds which may be of interest to investors, has been filed with the
Securities and Exchange Commission ("SEC"), is incorporated herein by reference
in its entirety, and may be obtained without charge from Goldman Sachs by
calling the telephone number, or writing to one of the addresses, listed on the
back cover of this Prospectus. The SEC maintains a Web site
(http://www.sec.gov) that contains the Additional Statement and other
information regarding the Trust.
 
INSTITUTIONAL SHARES OF THE FUNDS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR
GUARANTEED OR ENDORSED BY, ANY BANK OR OTHER INSURED DEPOSITORY INSTITUTION AND
ARE NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL
RESERVE BOARD OR ANY OTHER GOVERNMENT AGENCY. AN INVESTMENT IN A FUND INVOLVES
INVESTMENT RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
 
                                                        (continued on next page)
<PAGE>
 
(cover continued)
 
  A FUND'S INVESTMENTS IN SECURITIES OF FOREIGN ISSUERS AND FOREIGN CURRENCIES
ENTAIL CERTAIN RISKS NOT CUSTOMARILY ASSOCIATED WITH INVESTING IN SECURITIES OF
U.S. ISSUERS QUOTED IN U.S. DOLLARS, INCLUDING RISKS RELATING TO CHANGES IN
RELATIVE CURRENCY EXCHANGE RATES OR (AS IN THE CASE OF THE EXPECTED
INTRODUCTION OF THE EURO) THE CREATION OF NEW CURRENCIES. THE SECURITIES
MARKETS OF ASIAN, LATIN AMERICAN, EASTERN EUROPEAN, AFRICAN AND OTHER EMERGING
COUNTRIES IN WHICH THE CORE INTERNATIONAL EQUITY FUND CAN INVEST A PORTION OF
ITS ASSETS AND THE INTERNATIONAL SMALL CAP, INTERNATIONAL EQUITY, EMERGING
MARKETS AND ASIA GROWTH FUNDS MAY INVEST WITHOUT LIMIT, ARE LESS LIQUID, ARE
ESPECIALLY SUBJECT TO GREATER PRICE VOLATILITY, HAVE SMALLER MARKET
CAPITALIZATIONS, HAVE LESS GOVERNMENT REGULATION AND ARE NOT SUBJECT TO AS
EXTENSIVE AND FREQUENT ACCOUNTING, FINANCIAL AND OTHER REPORTING REQUIREMENTS
AS THE SECURITIES MARKETS OF MORE DEVELOPED COUNTRIES. FURTHER, INVESTMENT IN
EQUITY SECURITIES OF ISSUERS LOCATED IN RUSSIA AND CERTAIN OTHER EMERGING
COUNTRIES INVOLVES RISK OF LOSS RESULTING FROM PROBLEMS IN SHARE REGISTRATION
AND CUSTODY, WHICH RISKS ARE NOT NORMALLY ASSOCIATED WITH INVESTMENT IN MORE
DEVELOPED COUNTRIES. FUNDS THAT INVEST IN FOREIGN SECURITIES AND EMERGING
MARKETS ARE INTENDED FOR INVESTORS WHO CAN ACCEPT THE RISKS ASSOCIATED WITH
THESE INVESTMENTS AND MAY NOT BE SUITABLE FOR ALL INVESTORS. THE JAPANESE
EQUITY AND ASIA GROWTH FUNDS WILL BE PARTICULARLY SUBJECT TO EVENTS AFFECTING
THE MARKETS IN WHICH THESE FUNDS CONCENTRATE THEIR INVESTMENTS. SEE
"DESCRIPTION OF SECURITIES" AND "RISK FACTORS."
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
Fund Highlights....................    3
Fees and Expenses..................    6
Financial Highlights...............    8
Investment Objectives and Policies.   12
Description of Securities..........   17
Investment Techniques..............   21
Risk Factors.......................   24
Investment Restrictions............   28
Portfolio Turnover.................   28
Management.........................   28
Expenses...........................   34
</TABLE>
<TABLE>
<CAPTION>
                                     PAGE
                                     ----
<S>                                  <C>
Net Asset Value....................   34
Performance Information............   34
Shares of the Trust................   35
Taxation...........................   36
Additional Information.............   37
Reports to Shareholders............   38
Dividends..........................   38
Purchase of Institutional Shares...   38
Exchange Privilege.................   41
Redemption of Institutional Shares.   41
Appendix ..........................  A-1
Account Information Form
</TABLE>
 
                                       2
<PAGE>
 
 
                                FUND HIGHLIGHTS
 
   The following is intended to highlight certain information and is
 qualified in its entirety by the more detailed information contained in
 this Prospectus.
 
  WHAT IS THE GOLDMAN SACHS TRUST?
 
   The Goldman Sachs Trust is an open-end management investment company
 that offers its shares ("Shares") in several investment funds (commonly
 known as mutual funds (the "Funds")). Each Fund pools the monies of
 investors by selling its Shares to the public and investing these monies
 in a portfolio of securities designed to achieve that Fund's stated
 investment objectives.
 
  WHAT ARE THE INVESTMENT OBJECTIVES AND POLICIES OF THE FUNDS?
 
   Each Fund has distinct investment objectives and policies. There can be
 no assurance that a Fund's objectives will be achieved. Each Fund is a
 "diversified open-end management company" as defined in the Investment
 Company Act of 1940, as amended (the "Act"). For a further description of
 each Fund's investment objectives and policies, see "Investment
 Objectives and Policies," "Description of Securities" and "Investment
 Techniques."
 
<TABLE>
<CAPTION> 

                   INVESTMENT
 FUND NAME         OBJECTIVES               INVESTMENT CRITERIA                BENCHMARK
 -------------  ----------------  --------------------------------------   --------------------
<S>             <C>               <C>                                      <C>
 CORE           Long-term growth  At least 90% of total assets in equity   EAFE Index
 INTERNATIONAL  of capital.       securities of companies organized        (unhedged)
 EQUITY FUND                      outside the United States or whose
                                  securities are principally traded
                                  outside the United States. The Fund
                                  seeks broad representation of large cap
                                  issuers across major countries and
                                  sectors of the international economy.
                                  The Fund's investments are selected
                                  using both a variety of quantitative
                                  techniques and fundamental research in
                                  seeking to maximize the Fund's expected
                                  return, while maintaining risk, style,
                                  capitalization and industry
                                  characteristics similar to the unhedged
                                  Morgan Stanley Capital International
                                  (MSCI) Europe, Australasia and Far East
                                  Index (the "EAFE Index"). The Fund may
                                  employ certain currency management
                                  techniques.
- ------------------------------------------------------------------------------------------
 INTERNATIONAL  Long-term         Substantially all, and at least 65%, of  FT/Actuaries
 EQUITY FUND    capital           total assets in equity securities        Europe and
                appreciation.     of companies organized outside           Pacific Index
                                  the United States or whose securities    (unhedged)
                                  are principally traded outside the
                                  United States. The Fund may employ
                                  currency management techniques.
- ------------------------------------------------------------------------------------------
 JAPANESE       Long-term         Substantially all, and at least 65%, of  Tokyo Price
 EQUITY FUND    capital           total assets in equity securities of     Index ("TOPIX")
                appreciation.     Japanese companies. The Fund may employ
                                  currency management techniques.
- ------------------------------------------------------------------------------------------
 INTERNATIONAL  Long-term         Substantially all, and at least 65%, of  Morgan Stanley
 SMALL CAP      capital           total assets in equity securities of     Capital
 FUND           appreciation.     companies with public stock market       International
                                  capitalizations of $1 billion or less    EAFE Small Cap
                                  at the time of investment that are       Index
                                  organized outside the United States or
                                  whose securities are principally traded
                                  outside the United States. The Fund may
                                  employ currency management techniques.
</TABLE>
 
 
                                                                     (continued)
 
                                       3
                                                                              
<PAGE>
 
<TABLE>     
<CAPTION> 
                INVESTMENT
 FUND NAME      OBJECTIVES               INVESTMENT CRITERIA                BENCHMARK
 ----------- ----------------  ---------------------------------------  ----------------
<S>          <C>               <C>                                      <C>   
 EMERGING    Long-term         Substantially all, and at least 65%, of  Morgan Stanley
 MARKETS     capital           total assets in equity securities        Capital
 EQUITY FUND appreciation.     of emerging country issuers. The Fund    International
                               may employ certain currency management   Emerging Markets
                               techniques.                              Free Index
- ----------------------------------------------------------------------------------------
 ASIA GROWTH Long-term         Substantially all, and at least 65%, of  Morgan Stanley
 FUND        capital           total assets in equity securities        Capital
             appreciation.     of companies in China, Hong              International
                               Kong, India, Indonesia, Malaysia,        All Country Asia
                               Pakistan, the Philippines,  Singapore,   Free ex-Japan
                               South Korea, Sri Lanka, Taiwan,          Index
                               Thailand and other Asian countries.
                               The Fund may employ certain currency
                               management techniques.
</TABLE>
 
 
 WHAT ARE THE RISK FACTORS AND SPECIAL CHARACTERISTICS THAT I SHOULD CONSIDER
 BEFORE INVESTING?
 
  Each Fund's Share price will fluctuate with market, economic and, to the
extent applicable, foreign exchange conditions, so that an investment in
any of the Funds may be worth more or less when redeemed than when
purchased. None of the Funds should be relied upon as a complete investment
program. There can be no assurance that a Fund's investment objectives will
be achieved. See "Risk Factors."
 
  Risks of Investing in Small Capitalization Companies. To the extent that
a Fund invests in the securities of small market capitalization companies,
the Fund may be exposed to a higher degree of risk and price volatility.
Securities of such issuers may lack sufficient market liquidity to enable a
Fund to effect sales at an advantageous time or without a substantial drop
in price.
 
  Foreign Risks. Investments in securities of foreign issuers and
currencies involve risks that are different from those associated with
investments in domestic securities. The risks associated with foreign
investments and currencies include changes in relative currency exchange
rates (or, as in the case of the expected introduction of the euro next
year, the creation of new currencies), political and economic developments,
the imposition of exchange controls, confiscation and other governmental
restrictions. Generally, there is less availability of data on foreign
companies and securities markets as well as less regulation of foreign
stock exchanges, brokers and issuers. A Fund's investments in emerging
markets and countries ("Emerging Countries") involves greater risks than
investments in the developed countries of Western Europe, the United
States, Canada, Australia, New Zealand and Japan. In addition, because the
Funds invest primarily outside the United States, they may involve greater
risks, since the securities markets of foreign countries are generally less
liquid and subject to greater price volatility. The securities markets of
Emerging Countries, including those in Asia, Latin America, Eastern Europe
and Africa are marked by a high concentration of market capitalization and
trading volume in a small number of issuers representing a limited number
of industries, as well as a high concentration of ownership of such
securities by a limited number of investors.
 
  Risks of Investing in Japanese Markets. The Japanese Equity Fund will
concentrate in Japanese securities and, therefore, will be particularly subject
to the risk of adverse social, political and economic events which occur in
Japan or affect the Japanese markets.
 
  Other. A Fund's use of certain investment techniques, including
derivatives, forward contracts, options and futures, will subject the Fund
to greater risk than funds that do not employ such techniques.
 
                                       4
<PAGE>
 
 
 WHO MANAGES THE FUNDS?
 
  Goldman Sachs Asset Management serves as Investment Adviser to the CORE
International Equity Fund. Goldman Sachs Asset Management International
serves as Investment Adviser to each other Fund. As of July 24, 1998, the
Investment Advisers, together with their affiliates, acted as investment
adviser or distributor for assets in excess of $168 billion.
 
 WHO DISTRIBUTES THE FUNDS' SHARES?
 
  Goldman Sachs acts as distributor of each Fund's Shares (the
"Distributor").
 
 WHAT IS THE MINIMUM INVESTMENT?
 
  The minimum initial investment is $1,000,000 or $10,000,000 (depending
upon an investor's eligibility) in Institutional Shares of a Fund alone or
in combination with Institutional Shares (or the corresponding class) of
any other mutual fund sponsored by Goldman Sachs and designated as an
eligible fund for this purpose.
 
 HOW DO I PURCHASE INSTITUTIONAL SHARES?
 
  You may purchase Institutional Shares of the Funds through Goldman Sachs.
Institutional Shares are purchased at the current net asset value ("NAV")
without any sales load. See "Purchase of Institutional Shares."
 
 HOW DO I SELL MY INSTITUTIONAL SHARES?
 
  You may redeem Institutional Shares upon request on any Business Day, as
defined under "Additional Information," at the NAV next determined after
receipt of such request in proper form. See "Redemption of Institutional
Shares."
 
 HOW DO I RECEIVE DIVIDENDS AND DISTRIBUTIONS?
 
 
<TABLE>
<S>                           <C>
     INVESTMENT INCOME        CAPITAL GAINS
 DIVIDENDS DECLARED AND PAID  DISTRIBUTIONS
 ---------------------------- -------------
          Annually              Annually
</TABLE>
 
  Recordholders of Institutional Shares may receive dividends and
distributions in additional Institutional Shares of the Fund in which they
have invested or may elect to receive them in cash. For further information
concerning dividends and distributions, see "Dividends."
 
                                       5
<PAGE>
 
                               FEES AND EXPENSES
                            (INSTITUTIONAL SHARES)
 
<TABLE>
<CAPTION>
                                   CORE                  INT'L  EMERGING
                                  INT'L  INT'L  JAPANESE SMALL  MARKETS   ASIA
                                  EQUITY EQUITY  EQUITY   CAP    EQUITY  GROWTH
                                   FUND   FUND    FUND   FUND     FUND    FUND
                                  ------ ------ -------- -----  -------- ------
<S>                               <C>    <C>    <C>      <C>    <C>      <C>
SHAREHOLDER TRANSACTION
 EXPENSES:
 Maximum Sales Charge Imposed on
  Purchases.....................   None   None    None   None     None    None
 Maximum Sales Charge Imposed on
  Reinvested Dividends..........   None   None    None   None     None    None
 Redemption Fees................   None   None    None   None     None    None
 Exchange Fees..................   None   None    None   None     None    None
ANNUAL FUND OPERATING EXPENSES:
 (as a percentage of average
 daily net assets)/1/
 Management Fees................   0.85%  1.00%   1.00%  1.20%    1.20%   1.00%
 Distribution Fees..............   None   None    None   None     None    None
 Other Expenses (after
  applicable limitations)/2/....   0.16%  0.14%   0.05%  0.20%    0.19%   0.20%
                                   ----   ----    ----   ----     ----    ----
TOTAL FUND OPERATING EXPENSES
 (AFTER EXPENSE LIMITATIONS)/3/.   1.01%  1.14%   1.05%  1.40%    1.39%   1.20%
                                   ====   ====    ====   ====     ====    ====
</TABLE>
- ---------------------
/1/The Funds' annual operating expenses have been restated to reflect fees and
   expenses in effect as of September 1, 1998.
/2/The Investment Adviser has voluntarily agreed to reduce or limit certain
   other expenses (excluding management fees, transfer agency fees (equal to
   0.04% of the average daily net assets of each Fund's Institutional Shares),
   taxes, interest and brokerage fees and litigation, indemnification and other
   extraordinary expenses) for each Fund to the extent such expenses exceed the
   following percentages of average daily net assets:
<TABLE>
<CAPTION>
                                                                         OTHER
                                                                        EXPENSES
                                                                        --------
      <S>                                                               <C>
      CORE International Equity........................................   0.12%
      International Equity.............................................   0.10%
      Japanese Equity .................................................   0.01%
      International Small Cap..........................................   0.16%
      Emerging Markets Equity..........................................   0.15%
      Asia Growth......................................................   0.16%
</TABLE>
 
/3/Without the limitations described above, "Other Expenses" and "Total
   Operating Expenses" of the Institutional Shares of the Funds would be as set
   forth below:
<TABLE>
<CAPTION>
                                                                         TOTAL
                                                               OTHER   OPERATING
                                                              EXPENSES EXPENSES
                                                              -------- ---------
      <S>                                                     <C>      <C>
      CORE International Equity..............................   0.44%    1.29%
      International Equity...................................   0.22%    1.22%
      Japanese Equity........................................   2.07%    3.07%
      International Small Cap................................   3.35%    4.55%
      Emerging Markets Equity................................   0.50%    1.70%
      Asia Growth............................................   0.35%    1.35%
</TABLE>
 
 
                                       6
<PAGE>
 
<TABLE>
<CAPTION>
EXAMPLE:                                       1 YEAR 3 YEARS 5 YEARS 10 YEARS
- --------                                       ------ ------- ------- --------
<S>                                            <C>    <C>     <C>     <C>
You would pay the following expenses on a
 hypothetical $1,000 investment, assuming (1)
 a 5% annual return and (2) redemption at the
 end of each time period:
CORE International Equity.....................  $10     $32     $56     $124
International Equity..........................   12      36      63      139
Japanese Equity...............................   11      33     N/A      N/A
International Small Cap.......................   14      44     N/A      N/A
Emerging Markets Equity.......................   14      44     N/A      N/A
Asia Growth...................................   12      38      66      145
</TABLE>
 
  The Investment Adviser and Goldman Sachs may modify or discontinue any of
the limitations set forth above in the future at their discretion. The
information set forth in the foregoing table and hypothetical example relates
only to Institutional Shares of the Funds. Each Fund also offers Service
Shares and Class A, Class B and Class C Shares, which are subject to different
fees and expenses (which affect performance), have different minimum
investment requirements and are entitled to different services. Information
regarding Service, Class A, Class B and Class C Shares may be obtained from an
investor's sales representative or from Goldman Sachs by calling the number on
the back cover of this Prospectus.
 
  Institutions that invest in Institutional Shares on behalf of their
customers may charge fees directly to their customer accounts in connection
with their investments. Such fees, if any, may affect the return such
customers realize with respect to their investments.
 
  Certain institutions may also receive other compensation in connection with
the sale and distribution of Institutional Shares or for services to their
customers' accounts and/or the Funds. For additional information regarding
such compensation, see "Purchase of Institutional Shares" in this Prospectus
and the Additional Statement.
 
  The purpose of the foregoing table is to assist investors in understanding
the various fees and expenses of a Fund that an investor will bear directly or
indirectly. The information on the fees and expenses included in the table and
hypothetical example above are based on each Fund's fees and expenses (actual
or estimated) and should not be considered as representative of past or future
expenses. Actual fees and expenses may be greater or less than those
indicated. Moreover, while the example assumes a 5% annual return, a Fund's
actual performance will vary and may result in an actual return greater or
less than 5%. See "Management--Investment Advisers."
 
                                       7
<PAGE>
 
 
                             FINANCIAL HIGHLIGHTS
 
 
         SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD
 
  The following data have been audited by Arthur Andersen LLP, independent
public accountants, as indicated in their report incorporated by reference
into the Additional Statement from the Annual Report to shareholders of the
Funds for the year ended January 31, 1998 (the "Annual Report"). This
information should be read in conjunction with the financial statements and
related notes incorporated by reference and attached to the Additional
Statement. The Annual Report also contains performance information and is
available upon request and without charge by calling the telephone number or
writing to one of the addresses on the back cover of this Prospectus. During
the periods shown, the Trust did not offer Shares of the Japanese Equity and
International Small Cap Funds. Accordingly, there are no financial highlights
for these Funds.
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                      INCOME (LOSS) FROM               DISTRIBUTIONS TO
                                   INVESTMENT OPERATIONS(E)              SHAREHOLDERS
                           ---------------------------------------- -----------------------
                                                                                 FROM NET
                                       NET REALIZED   NET REALIZED               REALIZED
                                      AND UNREALIZED AND UNREALIZED              GAIN ON
                 NET ASSET            GAIN (LOSS) ON GAIN (LOSS) ON    FROM     INVESTMENT      NET     NET ASSET
                  VALUE,      NET      INVESTMENTS      CURRENCY       NET         AND       DECREASE    VALUE,
                 BEGINNING INVESTMENT  AND FUTURES      RELATED     INVESTMENT   FUTURES      IN NET     END OF     TOTAL
                 OF PERIOD   INCOME    TRANSACTIONS   TRANSACTIONS    INCOME   TRANSACTIONS ASSET VALUE  PERIOD   RETURN(A)
                 --------- ---------- -------------- -------------- ---------- ------------ ----------- --------- ---------
                                                                                           CORE INTERNATIONAL EQUITY FUND
- ------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>            <C>        <C>          <C>         <C>       <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......  $10.00     $   --       $0.13          $(0.91)      $   --       --         $(0.78)     $9.22     (7.66)%(d)
1998--Class B
Shares(b).......   10.00      (0.02)       0.13           (0.90)          --       --          (0.79)      9.21     (7.90)(d)
1998--Class C
Shares(b).......   10.00      (0.02)       0.13           (0.89)          --       --          (0.78)      9.22     (7.80)(d)
1998--Institu-
tional
Shares(b).......   10.00       0.02        0.13           (0.89)      (0.02)       --          (0.76)      9.24     (7.45)(d)
1998--Service
Shares(b).......   10.00       0.01        0.13           (0.91)          --       --          (0.77)      9.23     (7.70)(d)
<CAPTION>
                                                                                RATIOS ASSUMING
                                                                              NO VOLUNTARY WAIVER
                                                                                   OF FEES OR
                                                                              EXPENSE LIMITATIONS
                                                                            --------------------------
                                                               RATIO OF                   RATIO OF
                                         NET      RATIO OF        NET                        NET
                                      ASSETS AT      NET      INVESTMENT     RATIO OF    INVESTMENT
                 PORTFOLIO  AVERAGE     END OF   EXPENSES TO   INCOME TO     EXPENSES   INCOME (LOSS)
                 TURNOVER  COMMISSION   PERIOD   AVERAGE NET  AVERAGE NET   TO AVERAGE   TO AVERAGE
                   RATE       RATE    IN (000'S)   ASSETS       ASSETS      NET ASSETS   NET ASSETS
                 --------- ---------- ---------- ------------ ------------- ----------- --------------
- ------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>        <C>          <C>           <C>         <C>
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1998--Class A
Shares(b).......   25.16%    $.0069    $ 7,087      1.50%(c)     (0.27)%(c)    4.87%(c)     (3.90)%(c)
1998--Class B
Shares(b).......   25.16      .0069      2,721      2.00(c)      (0.72)(c)     5.12(c)      (3.84)(c)
1998--Class C
Shares(b).......   25.16      .0069      1,608      2.00(c)      (0.73)(c)     5.12(c)      (3.85)(c)
1998--Institu-
tional
Shares(b).......   25.16      .0069     17,719      1.00(c)       0.59(c)      4.12(c)      (2.53)(c)
1998--Service
Shares(b).......   25.16      .0069          1      1.50(c)       0.26(c)      4.62(c)      (2.86)(c)
</TABLE>
- -----------
(a) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions, a complete redemption of
    the investment at the net asset value at the end of the period and no
    sales or redemption charges. Total return would be reduced if a sales or
    redemption charge were taken into account.
(b) Commenced operations on August 15, 1997.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per share amounts.
 
 
                                       8
<PAGE>
 
<TABLE>
<CAPTION>
                                        INCOME FROM                              DISTRIBUTIONS TO
                                  INVESTMENT OPERATIONS(E)                         SHAREHOLDERS
                           -------------------------------------- -----------------------------------------------
                                                                                          FROM NET   IN EXCESS OF
                                                     NET REALIZED                         REALIZED   NET REALIZED
                                                         AND                              GAIN ON      GAIN ON       NET
                                                      UNREALIZED                         INVESTMENT   INVESTMENT   INCREASE
                 NET ASSET    NET      NET REALIZED  GAIN (LOSS)             IN EXCESS  AND FOREIGN  AND FOREIGN  (DECREASE)
                  VALUE,   INVESTMENT AND UNREALIZED ON CURRENCY   FROM NET    OF NET     CURRENCY     CURRENCY     IN NET
                 BEGINNING   INCOME   GAIN (LOSS) ON   RELATED    INVESTMENT INVESTMENT   RELATED      RELATED      ASSET
                 OF PERIOD   (LOSS)    INVESTMENTS   TRANSACTIONS   INCOME     INCOME   TRANSACTIONS TRANSACTIONS   VALUE
                 --------- ---------- -------------- ------------ ---------- ---------- ------------ ------------ ----------
                                                                                                INTERNATIONAL EQUITY FUND
- ----------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>          <C>        <C>        <C>          <C>          <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares..........  $19.32     $0.03        $2.99         $(0.95)     $  --      $(0.30)     $(0.88)      $(0.36)     $0.53
1998--Class B
Shares..........   19.24     (0.08)        2.96          (0.94)        --       (0.25)      (0.47)       (0.76)      0.46
1998--Class C
Shares(b).......   22.60     (0.04)       (2.03)          0.65         --       (0.38)         --        (1.24)     (3.04)
1998--Institu-
tional Shares...   19.40      0.10         3.09          (0.98)     (0.07)      (0.33)      (0.97)       (0.27)      0.57
1998--Service
Shares..........   19.34      0.02         3.02          (0.96)        --       (0.35)      (0.18)       (1.05)      0.50
- ----------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   17.20      0.10         3.51          (1.28)        --          --       (0.21)          --       2.12
1997--Class B
Shares(b).......   18.91     (0.06)        0.94          (0.34)        --          --       (0.21)          --       0.33
1997--Institu-
tional
Shares(b).......   17.45      0.04         3.39          (1.24)     (0.03)         --       (0.21)          --       1.95
1997--Service
Shares(b).......   17.70     (0.02)        2.95          (1.08)        --          --       (0.21)          --       1.64
- ----------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........   14.52      0.13         2.58           1.42      (0.58)         --       (0.87)          --       2.68
- ----------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........   18.10      0.06        (3.04)         (0.01)        --          --       (0.59)          --      (3.58)
- ----------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........   14.35      0.05         4.08          (0.38)        --          --          --           --       3.75
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1993--Class A
Shares(b).......   14.18     (0.01)        0.29          (0.11)        --          --          --           --       0.17
<CAPTION>
                                                                                             RATIOS ASSUMING
                                                                                           NO VOLUNTARY WAIVER
                                                                                                OF FEES OR
                                                                                           EXPENSE LIMITATIONS
                                                                                          -----------------------
                                                            NET    RATIO OF   RATIO OF
                                                           ASSETS    NET        NET       RATIO OF    RATIO OF
                  NET                                      AT END  EXPENSES  INVESTMENT   EXPENSES       NET
                 ASSET                                       OF       TO       INCOME        TO      INVESTMENT
                 VALUE,              PORTFOLIO  AVERAGE    PERIOD  AVERAGE   (LOSS) TO    AVERAGE   INCOME (LOSS)
                 END OF   TOTAL      TURNOVER  COMMISSION   (IN      NET      AVERAGE       NET      TO AVERAGE
                 PERIOD RETURN(A)      RATE     RATE(F)    000S)    ASSETS   NET ASSETS    ASSETS    NET ASSETS
                 ------ ------------ --------- ---------- -------- --------- ------------ --------- -------------
- ----------------------------------------------------------------------------------------------------------------------------
<S>              <C>    <C>          <C>       <C>        <C>      <C>       <C>          <C>       <C>
FOR THE YEARS ENDED JANUARY 31,
- -------------------------------
1998--Class A
Shares.......... $19.85   11.12%       40.82%    $.0207   $697,590   1.67%     (0.27)%      1.80%       (0.40)%
1998--Class B
Shares..........  19.70   10.51        40.82      .0207     55,324   2.20      (0.90)       2.30        (1.00)
1998--Class C
Shares(b).......  19.56   (5.92)(d)    40.82      .0207      3,369   2.27(c)   (1.43)(c)    2.37(c)     (1.53)(c)
1998--Institu-
tional Shares...  19.97   11.82        40.82      .0207     56,263   1.08       0.30        1.18         0.20
1998--Service
Shares..........  19.84   11.25        40.82      .0207      3,035   1.55      (0.36)       1.65        (0.46)
- ----------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........  19.32   13.48        38.01      .0318    536,283   1.69      (0.07)       1.88        (0.26)
1997--Class B
Shares(b).......  19.24    2.83(d)     38.01      .0318     19,198   2.23(c)   (0.97)(c)    2.38(c)     (1.12)(c)
1997--Institu-
tional
Shares(b).......  19.40   12.53(d)     38.01      .0318     68,374   1.10(c)    0.43(c)     1.25(c)      0.28(c)
1997--Service
Shares(b).......  19.34   10.42(d)     38.01      .0318        674   1.60(c)   (0.40)(c)    1.75(c)     (0.55)(c)
- ----------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares..........  17.20   28.68        68.48         --    330,860   1.52       0.26        1.77         0.01
- ----------------------------------------------------------------------------------------------------------------------------
1995--Class A
Shares..........  14.52  (16.65)       84.54         --    275,086   1.73       0.40        1.98         0.15
- ----------------------------------------------------------------------------------------------------------------------------
1994--Class A
Shares..........  18.10   26.13        60.04         --    269,091   1.76       0.51        2.01         0.26
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1993--Class A
Shares(b).......  14.35    1.23(d)      0.00         --     66,063   1.80(c)   (0.42)(c)    2.58(c)     (1.20)(c)
</TABLE>
- -----------
(a) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions, a complete redemption of
    the investment at the net asset value at the end of the period and no
    sales or redemption charges. Total return would be reduced if a sales or
    redemption charge were taken into account.
(b) Class A, Class B, Class C, Institutional and Service share activity
    commenced on December 1, 1992, May 1, 1996, August 15, 1997, February 7,
    1996 and March 6, 1996, respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
 
                                       9
<PAGE>
 
<TABLE>
<CAPTION>
                                           INCOME FROM
                                     INVESTMENT OPERATIONS(E)             DISTRIBUTIONS TO SHAREHOLDERS
                            ------------------------------------------ -----------------------------------
                                                        NET REALIZED                FROM NET
                  NET ASSET             NET REALIZED   AND UNREALIZED             REALIZED GAIN IN EXCESS
                   VALUE,      NET     AND UNREALIZED LOSS ON FOREIGN   FROM NET  ON INVESTMENT   OF NET   NET DECREASE NET ASSET
                  BEGINNING INVESTMENT GAIN (LOSS) ON CURRENCY RELATED INVESTMENT  AND OPTIONS  INVESTMENT IN NET ASSET VALUE, END
                  OF PERIOD   INCOME    INVESTMENTS     TRANSACTIONS     INCOME   TRANSACTIONS    INCOME      VALUE     OF PERIOD
                  --------- ---------- -------------- ---------------- ---------- ------------- ---------- ------------ ----------
<S>               <C>       <C>        <C>            <C>              <C>        <C>           <C>        <C>          <C>
                                                                                                      EMERGING MARKETS EQUITY FUND
 ---------------------------------------------------------------------------------------------------------------------------------
FOR THE PERIOD ENDED JANUARY 31, 1998
- -------------------------------------
1998 -- Class A
Shares(b).......   $10.00      $ --        $(0.11)         $(0.20)         --           --          --        $(0.31)     $9.69
1998 -- Class B
Shares(b).......    10.00        --         (0.11)          (0.20)         --           --          --         (0.31)      9.69
1998 -- Class C
Shares(b).......    10.00        --         (0.10)          (0.20)         --           --          --         (0.30)      9.70
1998 -- Institu-
tional
Shares(b).......    10.00      0.01         (0.11)          (0.20)         --           --          --         (0.30)      9.70
1998 -- Service
Shares(b).......    10.00        --         (0.11)          (0.20)         --           --          --         (0.31)      9.69
<CAPTION>
                                                                                              RATIOS ASSUMING NO
                                                                                               VOLUNTARY WAIVER
                                                                                                   OF FEES
                                                                                            OR EXPENSE LIMITATIONS
                                                                                           ---------------------------
                                                                               RATIO OF                 RATIO OF NET
                                                    NET ASSETS   RATIO OF   NET INVESTMENT  RATIO OF     INVESTMENT
                               PORTFOLIO  AVERAGE   AT END OF  NET EXPENSES INCOME (LOSS)  EXPENSES TO    LOSS TO
                    TOTAL      TURNOVER  COMMISSION   PERIOD    TO AVERAGE    TO AVERAGE   AVERAGE NET    AVERAGE
                  RETURN(A)      RATE       RATE    (IN 000S)   NET ASSETS    NET ASSETS     ASSETS      NET ASSETS
                  ------------ --------- ---------- ---------- ------------ -------------- ------------ --------------
<S>               <C>          <C>       <C>        <C>        <C>          <C>            <C>          <C>
 ---------------------------------------------------------------------------------------------------------------------------------
FOR THE PERIOD ENDED JANUARY 31, 1998
- -------------------------------------
1998 -- Class A
Shares(b).......    (3.10)%(d)   3.35%    $0.0005    $17,681       1.90%(c)      0.55%(c)     5.88%(c)     (3.43)%(c)
1998 -- Class B
Shares(b).......    (3.10)(d)    3.35      0.0005         64       2.41(c)       0.05(c)      6.39(c)      (3.93)(c)
1998 -- Class C
Shares(b).......    (3.00)(d)    3.35      0.0005         73       2.48(c)      (0.27)(c)     6.46(c)      (4.25)(c)
1998 -- Institu-
tional
Shares(b).......    (3.00)(d)    3.35      0.0005     19,120       1.30(c)       0.80(c)      5.28(c)      (3.18)(c)
1998 -- Service
Shares(b).......    (3.10)(d)    3.35      0.0005          2       2.72(c)      (0.05)(c)     6.70(c)      (4.03)(c)
</TABLE>
 ------------
 
 (a) Assumes investment at the net asset value at the beginning of the period,
     reinvestment of all dividends and distributions, a complete redemption of
     the investment at the net asset value at the end of the period and no
     sales or redemption charges. Total return would be reduced if a sales or
     redemption charge were taken into account.
 (b) Class A, Class B, Class C, Institutional and Service share activity
     commenced on December 15, 1997.
 (c) Annualized.
 (d) Not annualized.
 (e) Includes the balancing effect of calculating per share amounts.
 
 
 
 
                                       10
<PAGE>
 
<TABLE>
<CAPTION>
                                         INCOME FROM                         DISTRIBUTIONS TO
                                   INVESTMENT OPERATIONS(E)                    SHAREHOLDERS
                           ---------------------------------------- ----------------------------------
                                                      NET REALIZED                          FROM NET      NET
                                                     AND UNREALIZED                         REALIZED    INCREASE   NET
                 NET ASSET    NET      NET REALIZED    ON FOREIGN              IN EXCESS    GAIN ON    (DECREASE) ASSET
                  VALUE,   INVESTMENT AND UNREALIZED    CURRENCY     FROM NET    OF NET    INVESTMENT    IN NET   VALUE,
                 BEGINNING   INCOME   GAIN (LOSS) ON    RELATED     INVESTMENT INVESTMENT AND FUTURES    ASSET    END OF
                 OF PERIOD   (LOSS)    INVESTMENTS    TRANSACTIONS    INCOME     INCOME   TRANSACTIONS   VALUE    PERIOD
                 --------- ---------- -------------- -------------- ---------- ---------- ------------ ---------- ------
                                                                                                ASIA GROWTH FUND
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>            <C>            <C>        <C>        <C>          <C>        <C>
FOR THE YEAR ENDED JANUARY 31,
- ------------------------------
1998--Class A
Shares..........  $16.31     $  --        $(5.78)        $(2.12)      $   --     $(0.03)     $   --      $(7.93)  $8.38
1998--Class B
Shares..........   16.24      0.01         (5.79)         (2.12)          --      (0.03)         --       (7.93)   8.31
1998--Class C
Shares(b).......   15.73      0.01         (5.43)         (1.99)          --      (0.03)         --       (7.44)   8.29
1998--Institu-
tional Shares...   16.33      0.10         (5.83)         (2.13)       (0.03)        --          --       (7.89)   8.44
- ------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   16.49      0.06         (0.11)            --        (0.12)        --       (0.01)      (0.18)  16.31
1997--Class B
Shares(b).......   17.31     (0.05)        (0.48)            --        (0.51)     (0.03)         --       (1.07)  16.24
1997--Institu-
tional
Shares(b).......   16.61      0.04         (0.11)            --        (0.11)     (0.06)      (0.04)      (0.28)  16.33
- ------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares             13.31      0.17          3.44             --        (0.12)     (0.14)      (0.17)       3.18   16.49
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1995--Class A
Shares(b).......   14.18      0.11         (0.89)            --         0.01         --       (0.10)      (0.87)  13.31
<CAPTION>
                                                                                     RATIOS ASSUMING
                                                                                   NO VOLUNTARY WAIVER
                                                                                        OF FEES OR
                                                                                   EXPENSE LIMITATIONS
                                                                                  -----------------------
                                                     NET   RATIO OF   RATIO OF
                                                   ASSETS    NET        NET       RATIO OF    RATIO OF
                                                   AT END  EXPENSES  INVESTMENT   EXPENSES       NET
                                                     OF       TO       INCOME        TO      INVESTMENT
                              PORTFOLIO  AVERAGE   PERIOD  AVERAGE   (LOSS) TO    AVERAGE   INCOME (LOSS)
                   TOTAL      TURNOVER  COMMISSION   (IN     NET      AVERAGE       NET      TO AVERAGE
                 RETURN(A)      RATE     RATE(F)    000S)   ASSETS   NET ASSETS    ASSETS    NET ASSETS
                 ------------ --------- ---------- ------- --------- ------------ --------- -------------
- ------------------------------------------------------------------------------------------------------------------------
<S>              <C>          <C>       <C>        <C>     <C>       <C>          <C>       <C>
FOR THE YEAR ENDED JANUARY 31,
- ------------------------------
1998--Class A
Shares..........  (48.49)%     105.16%    $.0070   $87,437   1.75%      0.31%       1.99%        0.07%
1998--Class B
Shares..........  (48.70)      105.16      .0070     3,359   2.30      (0.29)       2.50        (0.49)
1998--Class C
Shares(b).......  (47.17)(d)   105.16      .0070       436   2.35(c)   (0.26)(c)    2.55(c)     (0.46)(c)
1998--Institu-
tional Shares...  (48.19)      105.16      .0070       874   1.11       0.87        1.31         0.67
- ------------------------------------------------------------------------------------------------------------------------
1997--Class A
Shares..........   (1.01)       48.40      .0151   263,014   1.67       0.20        1.87         0.00
1997--Class B
Shares(b).......   (6.02)(d)    48.40      .0151     3,354   2.21(c)   (0.56)(c)    2.37(c)     (0.72)(c)
1997--Institu-
tional
Shares(b).......   (1.09)(d)    48.40      .0151    13,322   1.10(c)    0.54(c)     1.26(c)      0.38 (c)
- ------------------------------------------------------------------------------------------------------------------------
1996--Class A
Shares             26.49        88.80         --   205,539   1.77       1.05        2.02         0.80
FOR THE PERIOD ENDED JANUARY 31,
- --------------------------------
1995--Class A
Shares(b).......   (5.46)(d)    36.08         --   124,298   1.90(c)    1.83(c)     2.38(c)      1.35(c)
</TABLE>
- -----------
(a) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions, a complete redemption of
    the investment at the net asset value at the end of the period and no
    sales or redemption charges. Total return would be reduced if a sales or
    redemption charge were taken into account.
(b) Class A, Class B, Class C and Institutional share activity commenced on
    July 8, 1994, May 1, 1996, August 15, 1997 and February 2, 1996,
    respectively.
(c) Annualized.
(d) Not annualized.
(e) Includes the balancing effect of calculating per share amounts.
(f) For fiscal years beginning on or after September 1, 1995, a fund is
    required to disclose its average commission rate on security transactions
    on which commissions are charged. This rate may vary due to various types
    of transactions and number of security trades executed.
 
 
                                       11
<PAGE>
 
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
 
  The investment objectives and principal investment policies of each Fund are
described below. In particular, each Fund may employ certain currency
techniques to seek to hedge against currency exchange rate fluctuations or to
seek to increase total return. When used to seek to enhance return, these
management techniques are considered speculative. Such currency management
techniques involve risks different from those associated with investing solely
in securities of U.S. issuers quoted in U.S. dollars. To the extent that a
Fund is fully invested in foreign securities while also maintaining currency
positions, it may be exposed to greater combined risk. A Fund's net currency
positions may expose it to risks independent of its securities positions.
There can be no assurance that a Fund's investment objectives will be
achieved.
 
  The Investment Adviser may purchase for the Funds common stocks, preferred
stocks, interests in real estate investment trusts, convertible debt
obligations, convertible preferred stocks, bonds with attached warrants,
equity-related transferable securities, equity interests in trusts,
partnerships, joint ventures, limited liability companies and similar
enterprises, warrants and stock purchase rights ("equity securities"). In
choosing a Fund's securities, the Investment Adviser utilizes first-hand
fundamental research, including visiting company facilities to assess
operations and to meet decision-makers. The Investment Adviser may also use
macro analysis of numerous economic and valuation variables to anticipate
changes in company earnings and the overall investment climate. The Investment
Adviser is able to draw on the research and market expertise of the Goldman
Sachs Global Investment Research Department and other affiliates of the
Investment Adviser, as well as information provided by other securities
dealers. Equity securities in a Fund's portfolio will generally be sold when
the Investment Adviser believes that the market price fully reflects or
exceeds the securities' fundamental valuation or when other more attractive
investments are identified. Other investment practices and management
techniques, which involve certain risks are described under "Description of
Securities," "Risk Factors" and "Investment Techniques."
 
  Actively Managed Funds. The International Equity, Japanese Equity,
International Small Cap, Emerging Markets Equity and Asia Growth Funds are
managed using an active international approach, which utilizes a consistent
process of stock selection undertaken by portfolio management teams located
within each of the major investment regions, including Europe, Japan, Asia and
the United States. In selecting securities, the Investment Adviser uses a
long-term, bottom-up strategy based on first-hand fundamental research that is
designed to give broad exposure to the available opportunities while seeking
to add return primarily through stock selection. Equity securities for these
Funds are evaluated based on three key factors--the business, the management
and the valuation. The Investment Adviser ordinarily seeks securities that
have, in the Investment Adviser's opinion, superior earnings growth potential,
sustainable franchise value with management attuned to creating shareholder
value and relatively discounted valuations. In addition, the Investment
Adviser uses a multi-factor risk model which seeks to assure that deviations
from the benchmark are justifiable.
 
  Quantitative Style Fund. The CORE International Equity Fund is managed using
both quantitative and fundamental techniques. CORE is an acronym for
"Computer-Optimized, Research-Enhanced," which reflects the CORE International
Equity Fund's investment process. This investment process and the proprietary
multifactor models used to implement it are discussed below.
 
  Investment Process. The Investment Adviser begins with a broad universe of
foreign equity securities for the CORE International Equity Fund. As described
more fully below, the Investment Adviser uses proprietary
 
                                      12
<PAGE>
 
multifactor models (each a "Multifactor Model") to forecast the returns of
different markets, currencies and individual securities. The Investment
Adviser may rely on research from both the Goldman Sachs Global Investment
Research Department (the "Research Department") and other industry sources.
 
  In building a diversified portfolio for the CORE International Equity Fund,
the Investment Adviser utilizes optimization techniques to seek to maximize
the Fund's expected return, while maintaining a risk profile similar to the
Fund's benchmark. The Fund's portfolio is primarily composed of securities
rated highest by the foregoing investment process and has risk characteristics
and industry weightings similar to the Fund's benchmark.
 
  Multifactor Models. The Multifactor Models are rigorous computerized rating
systems for forecasting the returns of different equity markets, currencies,
and individual equity securities according to fundamental investment
characteristics. The CORE International Equity Fund uses multiple Multifactor
Models to forecast returns. Currently, the CORE International Equity Fund uses
one model to forecast equity market returns, one model to forecast currency
returns and 22 separate models to forecast individual equity security returns
in 22 different countries. Despite this variety, all Multifactor Models
incorporate common variables covering measures of value, growth, momentum and
risk (e.g., book/price ratio, earnings/price ratio, price momentum, price
volatility, consensus growth forecasts, earnings estimate revisions, earnings
stability, currency momentum and country political risk ratings). All of the
factors used in the Multifactor Models have been shown to significantly impact
the performance of the securities, currencies and markets they were designed
to forecast.
 
  Because they include many disparate factors, the Investment Adviser believes
that all the Multifactor Models are broader in scope and provide a more
thorough evaluation than most conventional quantitative models. Securities and
markets ranked highest by the relevant Multifactor Model do not have one
dominant investment characteristic; rather, they possess an attractive
combination of investment characteristics.
 
  Research Department. In assigning ratings to equity securities, the Research
Department uses a four category rating system ranging from "recommended for
purchase" to "likely to underperform." The ratings reflect the analyst's
judgment as to the investment results of a specific security and incorporate
economic outlook, valuation, risk and a variety of other factors.
 
  By employing both a quantitative (i.e., the Multifactor Models) and a
qualitative (i.e., research enhanced) method of selecting securities, the CORE
International Equity Fund seeks to capitalize on the strengths of each
discipline.
 
 CORE INTERNATIONAL EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term growth of capital. The Fund seeks to achieve its objective through a
broadly diversified portfolio of large cap equity securities of companies that
are organized outside the United States or whose securities are primarily
traded outside the United States.
 
  Primary Investment Focus. The Fund invests, under normal circumstances, at
least 90% of its total assets in equity securities of companies that are
organized outside the United States or whose securities are principally traded
outside the United States. The Fund seeks broad representation of large cap
issuers across major countries and sectors of the international economy. The
Fund's investments are selected using both a variety of quantitative
 
                                      13
<PAGE>
 
techniques and fundamental research in seeking to maximize the Fund's expected
return, while maintaining risk, style, capitalization and industry
characteristics similar to the EAFE Index. In addition, the Fund seeks a
portfolio composed of companies with attractive valuations and stronger
momentum characteristics than the EAFE Index.
 
  The Fund may allocate its assets among countries as determined by the
Investment Adviser from time to time, provided the Fund's assets are invested
in at least three foreign countries. The Fund may invest in securities of
issuers in Emerging Countries which involve certain risks, as described below
under "Risk Factors--Special Risks of Investments in the Asian and Other
Emerging Markets," which are not present in investments in more developed
countries.
 
  For a description of the investment process of the Fund, see "Investment
Objectives and Policies--Quantitative Style Fund."
 
  Other. The Fund may invest only in fixed-income securities that are
considered to be cash equivalents.
 
 INTERNATIONAL EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal circumstances,
substantially all, and at least 65%, of its total assets in equity securities
of companies that are organized outside the United States or whose securities
are principally traded outside the United States. The Fund may allocate its
assets among countries as determined by the Investment Adviser from time to
time provided that the Fund's assets are invested in at least three foreign
countries. The Fund expects to invest a substantial portion of its assets in
the securities of issuers located in the developed countries of Western Europe
and in Japan. However, the Fund may also invest in the securities of issuers
located in Australia, Canada, New Zealand and the Emerging Countries in which
the Emerging Markets Equity Fund may invest. Many of the countries in which
the Fund may invest have emerging markets or economies which involve certain
risks, as described below under "Risk Factors--Special Risks of Investments in
the Asian and Other Emerging Markets," which are not present in investments in
more developed countries. The Fund intends to invest in companies with public
stock market capitalizations that are larger than those in which the
International Small Cap Fund primarily intends to invest.
 
  Other. Up to 35% of the Fund's total assets may be invested in fixed-income
securities.
 
 JAPANESE EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal circumstances,
substantially all, and at least 65%, of its total assets in equity securities
of Japanese companies. Japanese companies include those organized under the
laws of Japan or whose shares are traded primarily on a Japanese stock
exchange as well as those whose shares are registered with the Japan
Securities Dealers Association for trading primarily on Japan's over-the-
counter market. The Fund's concentration in Japanese companies will expose it
to the risk of adverse social, political and economic events which occur in
Japan or affect the Japanese markets as described under "Risk Factors--Special
Risks of Investment in the Japanese Markets."
 
                                      14
<PAGE>
 
  Other. The Fund may invest in the aggregate up to 35% of its total assets in
equity securities of non-Japanese companies and in fixed-income securities.
 
 INTERNATIONAL SMALL CAP FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal market
circumstances, substantially all, and at least 65%, of its total assets in
equity securities of companies with public stock market capitalizations of
$1 billion or less at the time of investment that are organized outside the
U.S. or whose securities are principally traded outside the U.S. The Fund may
allocate its assets among countries as determined by the Investment Adviser
from time to time provided that the Fund's assets are invested in at least
three foreign countries. The Fund expects to invest a substantial portion of
its assets in small cap securities of companies in the developed countries of
Western Europe, Japan and Asia. However, the Fund may also invest in the
securities of issuers located in Australia, Canada, New Zealand and the
Emerging Countries in which the Emerging Markets Equity Fund may invest. Many
of the countries in which the Fund may invest have emerging markets or
economics which involve certain risks, as described below under "Risk
Factors--Special Risks of Investments in Asian and Other Emerging Markets,"
which are not present in investments in more developed countries. If the
market capitalization of a company held by the Fund increases above $1
billion, the Fund may, consistent with its investment objective, continue to
hold the security.
 
  Other. The Fund may invest in the aggregate up to 35% of its total assets in
equity securities of larger cap companies with public stock market
capitalizations of more than $1 billion at the time of investment and in
fixed-income securities.
 
 EMERGING MARKETS EQUITY FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal market
circumstances, substantially all, and at least 65%, of its total assets in
equity securities of Emerging Country issuers. For purposes of the Fund's
investment policies, Emerging Countries are countries with economies or
securities markets that are considered by the Investment Adviser not to be
fully developed. The Investment Adviser may consider classifications by the
World Bank, the International Finance Corporation or the United Nations and
its agencies in determining whether a country is emerging or developed.
Currently, Emerging Countries include among others, most Latin American,
African, Asian and Eastern European nations. The Investment Adviser currently
intends that the Fund's investment focus will be in the following Emerging
Countries: Argentina, Botswana, Brazil, Chile, China, Colombia, the Czech
Republic, Egypt, Greece, Hong Kong, Hungary, India, Indonesia, Israel, Jordan,
Kenya, Malaysia, Mexico, Morocco, Pakistan, Peru, the Philippines, Poland,
Portugal, Russia, Singapore, South Africa, South Korea, Sri Lanka, Taiwan,
Thailand, Turkey, Venezuela and Zimbabwe.
 
  An Emerging Country issuer is any entity that satisfies at least one of the
following criteria: (i) it derives 50% or more of its total revenue from goods
produced, sales made or services performed in one or more Emerging Countries;
(ii) it is organized under the laws of, or has a principal office in, an
Emerging Country; (iii) it maintains 50% or more of its assets in one or more
of the Emerging Countries; or (iv) the principal securities trading market for
a class of its securities is in an Emerging Country.
 
                                      15
<PAGE>
 
  Investments in Emerging Countries involve certain risks as described under
"Risk Factors--Special Risks of Investments in the Asian and Other Emerging
Markets," which are not present in investments in more developed countries.
The Fund may purchase privately placed equity securities, equity securities of
companies that are in the process of being privatized by foreign governments,
securities of issuers that have not paid dividends on a timely basis, equity
securities of issuers that have experienced difficulties, and securities of
companies without performance records.
 
  Other. Under normal circumstances, the Fund maintains investments in at
least six Emerging Countries, and will not invest more than 35% of its total
assets in securities of issuers in any one Emerging Country. Allocation of the
Fund's investments will depend upon the relative attractiveness of the
Emerging Country markets and particular issuers. In addition, macro-economic
factors and the portfolio managers' and Goldman Sachs economists' views of the
relative attractiveness of Emerging Countries and currencies are considered in
allocating the Fund's assets among Emerging Countries. Concentration of the
Fund's assets in one or a few Emerging Countries and currencies will subject
the Fund to greater risks than if the Fund's assets were not geographically
concentrated. See "Description of Securities--Foreign Transactions" and "Risk
Factors." The Fund may invest in the aggregate up to 35% of its total assets
in (i) fixed-income securities of private and governmental Emerging Country
issuers; and (ii) equity and fixed-income securities of issuers in developed
countries.
 
 ASIA GROWTH FUND
 
 
  Objective. The Fund's investment objective is to provide investors with
long-term capital appreciation.
 
  Primary Investment Focus. The Fund invests, under normal market
circumstances, substantially all, and at least 65%, of its total assets in
equity securities of companies that satisfy at least one of the following
criteria: (i) their securities are traded principally on stock exchanges in
one or more of the Asian countries; (ii) they derive 50% or more of their
total revenue from goods produced, sales made or services performed in one or
more of the Asian countries; (iii) they maintain 50% or more of their assets
in one or more of the Asian countries; or (iv) they are organized under the
laws of one of the Asian countries. The Fund seeks to achieve its objective by
investing primarily in equity securities of Asian companies which are
considered by the Investment Adviser to have long-term capital appreciation
potential. Many of the countries in which the Fund may invest have emerging
markets or economies which involve certain risks as described under "Risk
Factors--Special Risks of Investments in the Asian and Other Emerging
Markets," which are not present in investments in more developed
countries. The Fund may purchase equity securities of issuers that have not
paid dividends on a timely basis, securities of companies that have
experienced difficulties, and securities of companies without performance
records.
 
  Other. The Fund may allocate its assets among the Asian countries as
determined from time to time by the Investment Adviser. For purposes of the
Fund's investment policies, Asian countries are China, Hong Kong, India,
Indonesia, Malaysia, Pakistan, the Philippines, Singapore, South Korea, Sri
Lanka, Taiwan and Thailand, as well as any other country in Asia (other than
Japan) to the extent that foreign investors are permitted by applicable law to
make such investments. Allocation of the Fund's investments will depend upon
the Investment Adviser's views of the relative attractiveness of the Asian
markets and particular issuers. For example, on January 31, 1998 (the end of
the Fund's last fiscal year), more than 35% of the Fund's assets were invested
in securities traded in Hong Kong. Concentration of the Fund's assets in one
or a few of the Asian countries and Asian currencies will subject the Fund to
greater risks than if the Fund's assets were not geographically concentrated.
See "Description of Securities--Foreign Investments." The Fund may invest in
the aggregate up to 35% of its total assets in equity securities of issuers in
other countries, including Japan, and in fixed-income securities.
 
                                      16
<PAGE>
 
 
                           DESCRIPTION OF SECURITIES
 
  The Funds may invest in equity and fixed income securities in accordance
with the investment policies stated above. Certain of these permitted
investments are described in more detail in this section.
 
CONVERTIBLE SECURITIES
 
  Each Fund may invest in convertible securities, including debt obligations
and preferred stock of the issuer convertible at a stated exchange rate into
common stock of the issuer. Convertible securities generally offer lower
interest or dividend yields than non-convertible securities of similar
quality. As with all fixed-income securities, the market value of convertible
securities tends to decline as interest rates increase and, conversely, to
increase as interest rates decline. However, when the market price of the
common stock underlying a convertible security exceeds the conversion price,
the convertible security tends to reflect the market price of the underlying
common stock. As the market price of the underlying common stock declines, the
convertible security tends to trade increasingly on a yield basis, and thus
may not decline in price to the same extent as the underlying common stock.
Convertible securities rank senior to common stocks in an issuer's capital
structure and consequently entail less risk than the issuer's common stock. In
evaluating a convertible security, the Investment Adviser will give primary
emphasis to the attractiveness of the underlying common stock. The convertible
securities in which the Funds invest are not subject to any minimum rating
criteria. Convertible debt securities are equity investments for purposes of
each Fund's investment policies.
 
FOREIGN INVESTMENTS
 
  FOREIGN SECURITIES. Each Fund will invest in the securities of foreign
issuers. Investments in foreign securities may offer potential benefits that
are not available from investments exclusively in equity securities of
domestic issuers quoted in U.S. dollars. Foreign countries may have economic
policies or business cycles different from those of the U.S. and markets for
foreign securities do not necessarily move in a manner parallel to U.S.
markets.
 
  Investing in the securities of foreign issuers involves certain special
risks, including those set forth below, which are not typically associated
with investing in U.S. dollar-denominated or quoted securities of U.S.
issuers. Such investments may be affected by changes in currency rates,
changes in foreign or U.S. laws or restrictions applicable to such investments
and in exchange control regulations (e.g., currency blockage). A decline in
the exchange rate of the currency (i.e., weakening of the currency against the
U.S. dollar) in which a portfolio security is quoted or denominated relative
to the U.S. dollar would reduce the value of the portfolio security. In
addition, if the currency in which a Fund receives dividends, interest or
other payments declines in value against the U.S. dollar before such income is
distributed as dividends to shareholders or converted to U.S. dollars, the
Fund may have to sell portfolio securities to obtain sufficient cash to pay
such dividends. The expected introduction of a single currency, the euro, on
January 1, 1999 for participating nations in the European Economic and
Monetary Union ("EU") presents unique uncertainties, including whether the
payment and operational systems of banks and other financial institutions will
be ready by the scheduled launch date; the creation of suitable clearing and
settlement payment systems for the new currency; the legal treatment of
certain outstanding financial contracts after January 1, 1999 that refer to
existing currencies rather than the euro; the establishment and maintenance of
exchange rates for currencies being converted into the euro and the euro; the
fluctuation of the euro relative to non-euro currencies during the transition
period from January 1, 1999 to December 31, 2000 and beyond; whether the
interest rate, tax and labor regimes of European countries participating in
the euro will converge over time; and whether the conversion of the currencies
of other EU
 
                                      17
<PAGE>
 
countries such as the United Kingdom, Denmark and Greece into the euro and the
admission of other non-EU countries such as Poland, Latvia and Lithuania as
members of the EU may have an impact on the euro. These or other factors,
including political and economic risks, could cause market disruptions before
or after the introduction of the euro, and could adversely affect the value of
securities held by the Funds. Commissions on transactions in foreign
securities may be higher than those for similar transactions on domestic stock
markets. In addition, clearance and settlement procedures may be different in
foreign countries and, in certain markets, such procedures have been unable to
keep pace with the volume of securities transactions, thus making it difficult
to conduct such transactions.
 
  Foreign issuers are not generally subject to uniform accounting, auditing
and financial reporting standards comparable to those applicable to U.S.
issuers. There may be less publicly available information about a foreign
issuer than about a U.S. issuer. In addition, there is generally less
government regulation of foreign markets, companies and securities dealers
than in the United States. Foreign securities markets may have substantially
less volume than U.S. securities markets and securities of many foreign
issuers are less liquid and more volatile than securities of comparable
domestic issuers. Furthermore, with respect to certain foreign countries,
there is a possibility of nationalization, expropriation or confiscatory
taxation, imposition of withholding or other taxes on dividend or interest
payments (or, in some cases, capital gains), limitations on the removal of
funds or other assets of the Funds, political or social instability or
diplomatic developments which could affect investments in those countries.
 
  Concentration of a Fund's assets in one or a few countries and currencies
will subject a Fund to greater risks than if a Fund's assets were not
geographically concentrated.
 
  INVESTMENTS IN ADRS, EDRS AND GDRS. Each Fund may invest in foreign
securities which take the form of sponsored and unsponsored American
Depository Receipts ("ADRs"), Global Depository Receipts ("GDRs"), European
Depository Receipts ("EDRs") or other similar instruments representing
securities of foreign issuers (together, "Depository Receipts"). ADRs
represent the right to receive securities of foreign issuers deposited in a
domestic bank or a correspondent bank. Prices of ADRs are quoted in U.S.
dollars, and ADRs are traded in the United States on exchanges or over-the-
counter and are sponsored and issued by domestic banks. EDRs and GDRs are
receipts evidencing an arrangement with a non-U.S. bank. EDRs and GDRs are not
necessarily quoted in the same currency as the underlying security. To the
extent a Fund acquires Depository Receipts through banks which do not have a
contractual relationship with the foreign issuer of the security underlying
the Depository Receipts to issue and service such Depository Receipts
(unsponsored Depository Receipts), there may be an increased possibility that
the Fund would not become aware of and be able to respond to corporate
actions, such as stock splits or rights offerings involving the foreign
issuer, in a timely manner. In addition, the lack of information may result in
inefficiencies in the valuation of such instruments. Investment in Depository
Receipts does not eliminate all the risks inherent in investing in securities
of non-U.S. issuers. The market value of Depository Receipts is dependent upon
the market value of the underlying securities and fluctuations in the relative
value of the currencies in which the Depository Receipt and the underlying
securities are quoted. However, by investing in Depository Receipts, such as
ADRs, that are quoted in U.S. dollars, a Fund may avoid currency risks during
the settlement period for purchases and sales.
 
  FOREIGN CURRENCY TRANSACTIONS. Because investment in foreign issuers will
usually involve currencies of foreign countries, and because each Fund may
have currency exposure independent of its securities positions, the value of
the assets of a Fund as measured in U.S. dollars will be affected by changes
in foreign currency exchange rates. A Fund may, to the extent it invests in
foreign securities, purchase or sell foreign currencies on a spot basis and
may also purchase or sell forward foreign currency exchange contracts for
hedging purposes and
 
                                      18
<PAGE>
 
to seek to protect against anticipated changes in future foreign currency
exchange rates. In addition, each Fund may enter into such contracts to seek
to increase total return when the Investment Adviser anticipates that the
foreign currency will appreciate or depreciate in value, but securities
denominated or quoted in that currency do not present attractive investment
opportunities and are not held in the Fund's portfolio. When entered into to
seek to enhance return, forward foreign currency exchange contracts are
considered speculative. Each Fund may also engage in cross-hedging by using
forward contracts in a currency different from that in which the hedged
security is denominated or quoted if the Investment Adviser determines that
there is a pattern of correlation between the two currencies. If a Fund enters
into a forward foreign currency exchange contract to buy foreign currency for
any purpose or to sell foreign currency to seek to increase total return, the
Fund will segregate cash or liquid assets in an amount equal to the value of
the Fund's total assets committed to the consummation of the forward contract,
or otherwise cover its position in a manner permitted by the SEC. The Fund
will incur costs in connection with conversions between various currencies. A
Fund may hold foreign currency received in connection with investments in
foreign securities when, in the judgment of the Investment Adviser, it would
be beneficial to convert such currency into U.S. dollars at a later date,
based on anticipated changes in the relevant exchange rate.
 
  Currency exchange rates may fluctuate significantly over short periods of
time causing, along with other factors, a Fund's NAV to fluctuate. Currency
exchange rates generally are determined by the forces of supply and demand in
the foreign exchange markets and the relative merits of investments in
different countries, actual or anticipated changes in interest rates and other
complex factors, as seen from an international perspective. Currency exchange
rates also can be affected unpredictably by the intervention of U.S. or
foreign governments or central banks, or the failure to intervene, or by
currency controls or political developments in the U.S. or abroad. To the
extent that a substantial portion of a Fund's total assets, adjusted to
reflect the Fund's net position after giving effect to currency transactions,
is denominated or quoted in the currencies of foreign countries, the Fund will
be more susceptible to the risk of adverse economic and political developments
within those countries.
 
  The market in forward foreign currency exchange contracts, currency swaps
and other privately negotiated currency instruments offers less protection
against defaults by the other party to such instruments than is available for
currency instruments traded on an exchange. Such contracts are subject to the
risk that the counterparty to the contract will default on its obligations.
Since these contracts are not guaranteed by an exchange or clearinghouse, a
default on the contract would deprive the Fund of unrealized profits,
transaction costs or the benefits of a currency hedge or force the Fund to
cover its purchase or sale commitments, if any, at the current market price. A
Fund will not enter into forward foreign currency exchange contracts, currency
swaps or other privately negotiated currency instruments unless the credit
quality of the unsecured senior debt or the claims-paying ability of the
counterparty is considered to be investment grade by the Investment Adviser.
 
  Each Fund may also engage in a variety of foreign currency management
techniques. However, due to the limited market for these instruments with
respect to the currencies of many Emerging Countries, including certain Asian
countries, the Investment Advisers do not currently anticipate that a
significant portion of International Equity, International Small Cap, Emerging
Markets Equity or Asia Growth Fund's currency exposure will be covered by such
instruments. For a discussion of such instruments and the risks associated
with their use, see "Investment Objective and Policies" in the Additional
Statement.
 
FIXED-INCOME SECURITIES
 
  Each Fund may invest in fixed-income securities, including U.S. Government
securities, corporate debt obligations, obligations issued by U.S. or foreign
banks (including without limitation, time deposits, bankers' acceptances and
certificates of deposit), mortgage-backed securities (including stripped
mortgage-backed securities) and asset-backed securities.
 
                                      19
<PAGE>
 
  Investments in fixed-income securities may include obligations of foreign
governments and governmental agencies, including those of Emerging Countries.
Investment in sovereign debt obligations involves special risks not present in
debt obligations of corporate issuers. The issuer of the debt or the
governmental authorities that control the repayment of the debt may be unable
or unwilling to repay principal or interest when due in accordance with the
terms of such debt, and a Fund may have limited recourse in the event of a
default. Periods of economic uncertainty may result in the volatility of
market prices of sovereign debt, and in turn a Fund's NAV, to a greater extent
than the volatility inherent in debt obligations of U.S. issuers. A sovereign
debtor's willingness or ability to repay principal and pay interest in a
timely manner may be affected by, among other factors, its cash flow
situation, the extent of its foreign currency reserves, the availability of
sufficient foreign exchange on the date a payment is due, the relative size of
the debt service burden to the economy as a whole, the sovereign debtor's
policy toward international lenders and the political constraints to which a
sovereign debtor may be subject.
 
  Fixed-income investments may also include investments in structured
securities. The value of the principal of and/or interest on such securities
is determined by reference to changes in the value of specific currencies,
interest rates, commodities, indices or other financial indicators (the
"Reference") or the relative change in two or more References. The interest
rate or the principal amount payable upon maturity or redemption may be
increased or decreased depending upon changes in the applicable Reference. The
terms of the structured securities may provide that in certain circumstances
no principal is due at maturity and, therefore, result in the loss of a Fund's
investment. Structured securities may be positively or negatively indexed, so
that appreciation of the Reference may produce an increase or decrease in the
interest rate or value of the security at maturity. In addition, changes in
the interest rates or the value of the security at maturity may be a multiple
of changes in the value of the Reference. Consequently, structured securities
may entail a greater degree of market risk than other types of fixed-income
securities. Structured securities may also be more volatile, less liquid and
more difficult to price accurately than less complex securities.
 
  Each Fund (other than the CORE International Equity Fund, which only invests
in debt instruments that are cash equivalents) may invest up to 35% of its
total assets in debt securities which are unrated or rated in the lowest
rating categories by Standard & Poor's Ratings Group ("Standard & Poor's") or
Moody's Investors Service, Inc. ("Moody's") (i.e., BB or lower by Standard &
Poor's or Ba or lower by Moody's), including securities rated D by Moody's or
Standard & Poor's. Fixed-income securities rated BB or Ba or below (or
comparable unrated securities) are commonly referred to as "junk bonds," are
considered predominately speculative and may be questionable as to principal
and interest payments. In some cases, such bonds may be highly speculative,
have poor prospects for reaching investment grade standing and be in default.
As a result, investment in such bonds will entail greater speculative risks
than those associated with investment in investment grade bonds. Also, to the
extent that the rating assigned to a security in a Fund's portfolio is
downgraded by a rating organization, the market price and liquidity of such
security may be adversely affected. See Appendix A to the Additional Statement
for a description of the corporate bond ratings assigned by Standard & Poor's
and Moody's.
 
REAL ESTATE INVESTMENT TRUSTS ("REITS")
 
  Each Fund may invest in REITs, which are pooled investment vehicles that
invest primarily in either real estate or real estate related loans. The value
of a REIT is affected by changes in the value of the properties owned by the
REIT or securing mortgage loans held by the REIT. REITs are dependent upon
cash flow from their investments to repay financing costs and the ability of
the REITs' managers. REITs are also subject to risks generally associated with
investments in real estate. A Fund will indirectly bear its proportionate
share of any expenses, including management fees, paid by a REIT in which it
invests.
 
                                      20
<PAGE>
 
 
                             INVESTMENT TECHNIQUES
 
 
OPTIONS ON SECURITIES AND SECURITIES INDICES
 
  Each Fund may write (sell) covered call and put options and purchase call
and put options on any securities in which it may invest or on any securities
index composed of securities in which it may invest. The writing and purchase
of options is a highly specialized activity which involves investment
techniques and risks different from those associated with ordinary portfolio
securities transactions. The use of options to seek to increase total return
involves the risk of loss if the Investment Adviser is incorrect in its
expectation of fluctuations in securities prices or interest rates. The
successful use of options for hedging purposes also depends in part on the
ability of the Investment Adviser to manage future price fluctuations and the
degree of correlation between the options and securities markets. If the
Investment Adviser is incorrect in its expectation of changes in securities
prices or determination of the correlation between the securities indices on
which options are written and purchased and the securities in a Fund's
investment portfolio, the investment performance of the Fund will be less
favorable than it would have been in the absence of such options transactions.
The writing of options could significantly increase a Fund's portfolio
turnover rate and, therefore, associated brokerage commissions or spreads.
 
OPTIONS ON FOREIGN CURRENCIES
 
  A Fund may, to the extent it invests in foreign securities, purchase and
sell (write) call and put options on foreign currencies for the purpose of
protecting against declines in the U.S. dollar value of foreign portfolio
securities and anticipated dividends on such securities and against increases
in the U.S. dollar cost of foreign securities to be acquired. In addition,
each Fund may use options on currency to cross-hedge, which involves writing
or purchasing options on one currency to hedge against changes in exchange
rates for a different currency, if there is a pattern of correlation between
the two currencies. As with other kinds of options transactions, however, the
writing of an option on a foreign currency will constitute only a partial
hedge, up to the amount of the premium received. If an option that a Fund has
written is exercised, the Fund could be required to purchase or sell foreign
currencies at disadvantageous exchange rates, thereby incurring losses. The
purchase of an option on foreign currency may constitute an effective hedge
against exchange rate fluctuations; however, in the event of exchange rate
movements adverse to a Fund's position, the Fund may forfeit the entire amount
of the premium plus related transaction costs. In addition to purchasing call
and put options for hedging purposes, each Fund may purchase call or put
options on currency to seek to increase total return when the Investment
Adviser anticipates that the currency will appreciate or depreciate in value,
but the securities quoted or denominated in that currency do not present
attractive investment opportunities and are not held in the Fund's portfolio.
When purchased or sold to seek to increase total return, options on currencies
are considered speculative. Options on foreign currencies written or purchased
by the Funds are traded on U.S. and foreign exchanges or over-the-counter.
 
FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS
 
  To seek to increase total return or to hedge against changes in interest
rates, securities prices or currency exchange rates, a Fund may purchase and
sell various kinds of futures contracts, and purchase and write call and put
options on any of such futures contracts. Each Fund may also enter into
closing purchase and sale transactions with respect to any such contracts and
options. The futures contracts may be based on various securities, foreign
currencies, securities indices and other financial instruments and indices,
whether domestic or foreign. A Fund will engage in futures and related options
transactions for bona fide hedging purposes as defined
 
                                      21
<PAGE>
 
in regulations of the Commodity Futures Trading Commission or to seek to
increase total return to the extent permitted by such regulations. A Fund may
not purchase or sell futures contracts or purchase or sell related options to
seek to increase total return, except for closing purchase or sale
transactions, if immediately thereafter the sum of the amount of initial
margin deposits and premiums paid on the Fund's outstanding positions in
futures and related options entered into for the purpose of seeking to
increase total return would exceed 5% of the market value of the Fund's net
assets. These transactions involve brokerage costs, require margin deposits
and, in the case of contracts and options obligating a Fund to purchase
securities or currencies, require the Fund to segregate and maintain cash or
liquid assets with a value equal to the amount of the Fund's obligations or to
otherwise cover the obligations in a manner permitted by the SEC.
 
  While transactions in futures contracts and options on futures may reduce
certain risks, such transactions themselves entail certain other risks. See
"Investment Objectives and Policies--Futures Contracts and Options on Future
Contracts" in the Additional Statement. Thus, while a Fund may benefit from
the use of futures and options on futures, unanticipated changes in interest
rates, securities prices or currency exchange rates may result in poorer
overall performance than if the Fund had not entered into any futures
contracts or options transactions. Because perfect correlation between a
futures position and portfolio position that is intended to be protected is
impossible to achieve, the desired protection may not be obtained and a Fund
may be exposed to risk of loss. The loss incurred by a Fund in entering into
futures contracts and in writing call options on futures is potentially
unlimited and may exceed the amount of the premium received. Futures markets
are highly volatile and the use of futures may increase the volatility of a
Fund's NAV. The profitability of a Fund's trading in futures to seek to
increase total return depends upon the ability of the Investment Adviser to
analyze correctly the futures markets. In addition, because of the low margin
deposits normally required in futures trading, a relatively small price
movement in a futures contract may result in substantial losses to a Fund.
Further, futures contracts and options on futures may be illiquid, and
exchanges may limit fluctuations in futures contract prices during a single
day. The Funds may engage in futures transactions on both U.S. and foreign
exchanges. Foreign exchanges may not provide the same protections as U.S.
exchanges.
 
EQUITY SWAPS
 
  Each Fund may invest up to 10% of its total assets in equity swaps. Equity
swaps allow the parties to a swap agreement to exchange the dividend income or
other components of return on an equity investment (e.g., a group of equity
securities or an index) for a component of return on another non-equity or
equity investment. An equity swap may be used by a Fund to invest in a market
without owning or taking physical custody of securities in circumstances in
which direct investment may be restricted for legal reasons or is otherwise
impractical. Equity swaps are derivatives and their value can be very
volatile. To the extent that the Investment Adviser does not accurately
analyze and predict the potential relative fluctuation of the components
swapped with another party, a Fund may suffer a loss. The value of some
components of an equity swap (such as the dividends on a common stock) may
also be sensitive to changes in interest rates. Furthermore, during the period
a swap is outstanding, a Fund may suffer a loss if the counterparty defaults.
In connection with its investments in equity swaps, a Fund will either
segregate cash or liquid assets or otherwise cover its obligations in a manner
required by the SEC.
 
WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS
 
  Each Fund may purchase when-issued securities. When-issued transactions
arise when securities are purchased by a Fund with payment and delivery taking
place in the future in order to secure what is considered to be an
advantageous price and yield to the Fund at the time of entering into the
transaction. Each Fund may
 
                                      22
<PAGE>
 
also purchase or sell securities on a forward commitment basis; that is, make
contracts to purchase or sell securities for a fixed price at a future date
beyond the customary settlement period. The purchase of securities on a when-
issued or forward commitment basis involves a risk of loss if the value of the
security to be purchased declines prior to the settlement date. Conversely,
securities sold on a forward commitment basis involve the risk that the value
of the securities to be sold may increase prior to the settlement date.
Although a Fund would generally purchase securities on a when-issued or
forward commitment basis with the intention of acquiring securities for its
portfolio, a Fund may dispose of when-issued securities or forward commitments
prior to settlement if the Investment Adviser deems it appropriate to do so. A
Fund will segregate cash or liquid assets in an amount sufficient to meet the
purchase price until three days prior to the settlement date. Alternatively,
each Fund may enter into offsetting contracts for the forward sale of other
securities that it owns.
 
ILLIQUID AND RESTRICTED SECURITIES
 
  A Fund will not invest more than 15% of its net assets in illiquid
investments, which include securities (both foreign and domestic) that are not
readily marketable, certain stripped mortgage-backed securities, repurchase
agreements maturing in more than seven days, time deposits with a notice or
demand period of more than seven days, certain over-the-counter options and
certain restricted securities, unless it is determined, based upon a review of
the trading markets for a specific restricted security, that such restricted
security is eligible for resale pursuant to Rule 144A under the Securities Act
of 1933 and, therefore, is liquid. The Trustees have adopted guidelines under
which the Investment Adviser determines and monitors the liquidity of
portfolio securities, subject to the oversight of the Trustees. Investing in
restricted securities eligible for resale pursuant to Rule 144A may decrease
the liquidity of a Fund's portfolio to the extent that qualified institutional
buyers become for a time uninterested in purchasing these restricted
securities. The purchase price and subsequent valuation of restricted and
illiquid securities normally reflect a discount, which may be significant,
from the market price of comparable securities for which a liquid market
exists.
 
REPURCHASE AGREEMENTS
 
  Each Fund may enter into repurchase agreements with dealers in U.S.
Government securities and member banks of the Federal Reserve System which
furnish collateral at least equal in value or market price to the amount of
their repurchase obligation. Each Fund may also enter into repurchase
agreements involving certain foreign government securities. If the other party
or "seller" defaults, a Fund might suffer a loss to the extent that the
proceeds from the sale of the underlying securities and other collateral held
by the Fund in connection with the related repurchase agreement are less than
the repurchase price. In addition, in the event of bankruptcy of the seller or
failure of the seller to repurchase the securities as agreed, a Fund could
suffer losses, including loss of interest on or principal of the security and
costs associated with delay and enforcement of the repurchase agreement. The
Trustees have reviewed and approved certain counterparties whom they believe
to be creditworthy and have authorized the Funds to enter into repurchase
agreements with such counterparties. In addition, each Fund, together with
other registered investment companies having management agreements with an
Investment Adviser or its affiliates, may transfer uninvested cash balances
into a single joint account, the daily aggregate balance of which will be
invested in one or more repurchase agreements.
 
LENDING OF PORTFOLIO SECURITIES
 
  Each Fund may also seek to increase its income by lending portfolio
securities. Under present regulatory policies, such loans may be made to
institutions, such as certain broker-dealers, and are required to be secured
continuously by collateral in cash, cash equivalents, or U.S. Government
securities maintained on a current basis in an amount at least equal to the
market value of the securities loaned. Cash collateral may be invested in cash
 
                                      23
<PAGE>
 
equivalents. If an Investment Adviser determines to make securities loans, the
value of the securities loaned may not exceed 33 1/3% of the value of the
total assets of a Fund (including the loan collateral). A Fund may experience
a loss or delay in the recovery of its securities if the institution with
which it has engaged in a portfolio loan transaction breaches its agreement
with the Fund.
 
SHORT SALES AGAINST-THE-BOX
 
  Each Fund (other than the CORE International Equity Fund) may make short
sales of securities or maintain a short position, provided that at all times
when a short position is open the Fund owns an equal amount of such securities
or securities convertible into or exchangeable for, without payment of any
further consideration, for an equal amount of the securities of the same
issuer as the securities sold short (a short sale against-the-box). Not more
than 25% of a Fund's net assets (determined at the time of the short sale) may
be subject to such short sales. As a result of recent tax legislation, short
sales may not generally be used to defer the recognition of gain for tax
purposes with respect to appreciated securities in a Fund's portfolio.
 
TEMPORARY INVESTMENTS
 
  Each Fund may, for temporary defensive purposes, invest 100% of its total
assets (except that the CORE International Equity Fund and Emerging Markets
Equity Fund may only hold up to 35% of their respective total assets) in U.S.
Government securities, repurchase agreements collateralized by U.S. Government
securities, commercial paper rated at least A-2 by Standard & Poor's or P-2 by
Moody's, certificates of deposit, bankers' acceptances, repurchase agreements,
non-convertible preferred stocks, non-convertible corporate bonds with a
remaining maturity of less than one year. When a Fund's assets are invested in
such instruments, the Fund may not be achieving its investment objective.
 
MISCELLANEOUS TECHNIQUES
 
  In addition to the techniques and investments described above, each Fund
may, with respect to no more than 5% of its net assets, engage in the
following techniques and investments: (i) warrants and stock purchase rights;
(ii) currency swaps; (iii) other investment companies including World Equity
Benchmark Shares and Standard & Poor's Depository Receipts; (iv) unseasoned
companies; and (v) custodial receipts.
 
  In addition, each Fund may borrow up to 33 1/3% of its total assets from
banks for temporary or emergency purposes. A Fund may not make additional
investments if borrowings exceed 5% of its total assets. For more information,
see the Additional Statement.
 
 
                                 RISK FACTORS
 
  RISKS OF INVESTING IN EQUITY SECURITIES. In general, the Funds are subject
to the risks associated with investments in common stocks and other equity
securities. Stock values fluctuate in response to the activities of individual
companies and in response to general market and economic conditions and,
accordingly, the value of the stocks that a Fund holds may decline over short
or extended periods. Stock markets tend to be cyclical, with periods when
stock prices generally rise and periods when prices generally decline. As of
the date of this Prospectus, certain foreign stock markets were trading at or
close to record high levels and there can be no guarantee that such levels
will continue.
 
                                      24
<PAGE>
 
  RISKS OF INVESTING IN SMALL CAPITALIZATION COMPANIES. Investing in the
securities of such companies involves greater risk and the possibility of
greater portfolio price volatility. Historically, small market capitalization
stocks and stocks of recently organized companies have been more volatile in
price than larger market capitalization stocks included in the S&P 500 Index.
Among the reasons for the greater price volatility of these small company and
unseasoned stocks are the less certain growth prospects of smaller firms, less
institutional investor interest and the lower degree of liquidity in the
markets for such stocks.
 
  SPECIAL RISKS OF INVESTMENTS IN THE ASIAN AND OTHER EMERGING
MARKETS. Investing in the securities of issuers in Emerging Countries involves
risks in addition to those discussed under "Description of Securities--
Foreign Investments." The International Equity, International Small Cap,
Emerging Markets Equity and Asia Growth Funds may each invest without limit in
the securities of issuers in Emerging Countries. The CORE International Equity
Fund may invest up to 25% of its total assets in securities of issuers in
Emerging Countries. Emerging Countries are generally located in the Asia-
Pacific region, Eastern Europe, Latin and South America and Africa. A Fund's
purchase and sale of portfolio securities in certain Emerging Countries may be
constrained by limitations as to daily changes in the prices of listed
securities, periodic trading or settlement volume and/or limitations on
aggregate holdings of foreign investors. Such limitations may be computed
based on the aggregate trading volume by or holdings of a Fund, the Investment
Adviser, its affiliates and their respective clients and other service
providers. A Fund may not be able to sell securities in circumstances where
price, trading or settlement volume limitations have been reached.
 
  Foreign investment in the securities markets of certain Emerging Countries
is restricted or controlled to varying degrees which may limit investment in
such Countries or increase the administrative costs of such investments. For
example, certain Asian countries require governmental approval prior to
investments by foreign persons or limit investment by foreign persons to only
a specified percentage of an issuer's outstanding securities or a specific
class of securities which may have less advantageous terms (including price)
than securities of the issuer available for purchase by nationals. In
addition, certain countries may restrict or prohibit investment opportunities
in issuers or industries deemed important to national interests. Such
restrictions may affect the market price, liquidity and rights of securities
that may be purchased by a Fund. The repatriation of both investment income
and capital from certain Emerging Countries is subject to restrictions such as
the need for governmental consents. Due to restrictions on direct investment
in equity securities in certain Asian countries, such as Taiwan, it is
anticipated that a Fund may invest in such countries only through other
investment funds in such countries. See "Other Investment Companies" in the
Additional Statement.
 
  Many Emerging Countries may be subject to a greater degree of economic,
political and social instability than is the case in Western Europe, the
United States, Canada, Australia, New Zealand and Japan. Many Emerging
Countries do not have fully democratic governments. For example, governments
of some Emerging Countries are authoritarian in nature or have been installed
or removed as a result of military coups, while governments in other Emerging
Countries have periodically used force to suppress civil dissent. Disparities
of wealth, the pace and success of democratization, and ethnic, religious and
racial disaffection, among other factors, have also led to social unrest,
violence and/or labor unrest in some Asian and other Emerging Countries.
Unanticipated political or social developments may affect the values of a
Fund's investments. Investing in Emerging Countries involves the risk of loss
due to expropriation, nationalization, confiscation of assets and property or
the imposition of restrictions on foreign investments and on repatriation of
capital invested. Starting in mid-1997 some Pacific region countries began to
experience currency devaluations that resulted in high interest rate levels
and sharp reductions in economic activity. This situation resulted in a
significant drop in the securities prices of companies located in the region.
Some countries have experienced government intervention,
 
                                      25
<PAGE>
 
have sought assistance from the International Monetary Fund and are undergoing
substantial domestic unrest. Although some countries are taking steps to
restructure their financial sectors in a manner that may facilitate a return
to long-term economic growth, there can be no assurance that these efforts
will be successful or that their current problems will not persist. At the end
of its last fiscal year, a substantial portion of the assets of the Asia
Growth Fund were invested in securities traded in the Hong Kong market. In
1997, the sovereignty of Hong Kong reverted from the United Kingdom to China.
Although Hong Kong is, by law, to maintain a high degree of autonomy, there
can also be no assurance that the general economic position of Hong Kong will
not be adversely affected as a result of the exercise of Chinese sovereignty
over Hong Kong. In particular, business confidence in Hong Kong can be
significantly affected by political developments and statements by public
figures in China, which can in turn affect the performance of the securities
markets. In addition, the reversion of Hong Kong to China has created
uncertainty as to future currency valuations relative to the U.S. dollar. Any
future valuation changes could be adverse from the perspective of U.S.
investors.
 
  Economies in individual Emerging Countries may differ favorably or
unfavorably from the U.S. economy in such respects as growth of gross domestic
product, rates of inflation, currency valuation, capital reinvestment,
resource self-sufficiency and balance of payments positions. Many Emerging
Countries have experienced currency devaluations and substantial and, in some
cases, extremely high rates of inflation, which have a negative effect on the
economies and securities markets of such Emerging Countries. Economies in
Emerging Countries generally are dependent heavily upon commodity prices and
international trade and, accordingly, have been and may continue to be
affected adversely by the economies of their trading partners, trade barriers,
exchange controls, managed adjustments in relative currency values and other
protectionist measures imposed or negotiated by the countries with which they
trade.
 
  Brokerage commissions, custodial services and other costs relating to
investment in international securities markets generally are more expensive
than in the United States. A Fund's investment in Emerging Countries may also
be subject to withholding or other taxes, which may be significant and may
reduce the return from an investment in such country to the Fund. Settlement
procedures in Emerging Countries are frequently less developed and reliable
than those in the United States and may involve a Fund's delivery of
securities before receipt of payment for their sale. In addition, significant
delays are common in certain markets in registering the transfer of
securities. Settlement or registration problems may make it more difficult for
a Fund to value its portfolio securities and could cause the Fund to miss
attractive investment opportunities, to have a portion of its assets
uninvested or to incur losses due to the failure of a counterparty to pay for
securities the Fund has delivered or the Fund's inability to complete its
contractual obligations.
 
  Currently, there is no market or only a limited market for many of the
management techniques and instruments with respect to the currencies and
securities markets of the Emerging Countries. Consequently, there can be no
assurance that suitable instruments for hedging currency and market-related
risks will be available at the times when a Fund wishes to use them.
 
  SPECIAL RISKS OF INVESTMENTS IN THE JAPANESE MARKETS. The Japanese Equity
Fund invests primarily in equity securities of Japanese companies.
Accordingly, the Japanese Equity Fund's performance will be closely tied to
economic and market conditions in Japan, and may be more volatile than more
geographically diversified funds. Changes in regulatory, as well as tax or
economic, policy in Japan could significantly affect the Japanese securities
markets and, therefore, the Japanese Equity Fund's performance.
 
  Japan's economy, the second largest in the world, has grown substantially
over the last three decades. Since 1990, however, Japan's economic growth has
declined significantly, and is currently subject to deflationary
 
                                      26
<PAGE>
 
pressures. In addition to this economic downturn, Japan is undergoing
structural adjustments related to high wages and taxes, currency valuations
and structural rigidities. Japan has also been experiencing notable
uncertainty and loss of public confidence in connection with the reform of its
political process and the deregulation of its economy. These conditions
present risks to the Japanese Equity Fund and its ability to attain its
investment objective.
 
  Japan's economy is heavily dependent upon international trade, and is
especially sensitive to trade barriers and disputes. In particular, Japan
relies on large imports of agricultural products, raw materials and fuels. A
substantial rise in world oil or commodity prices, or a fall-off in Japan's
manufactured exports, could be expected to adversely affect Japan's economy.
In addition, Japan is vulnerable to earthquakes, volcanoes and other natural
disasters. As of the date of this Prospectus, Japan's banking industry
continued to suffer from non-performing loans, declining real estate values
and lower valuations of securities holdings.
 
  The Japanese securities markets are less regulated than the U.S. markets.
Evidence has emerged from time to time of distortion of market prices to serve
political or other purposes. Shareholders' rights are also not always equally
enforced.
 
  The common stocks of many Japanese companies trade at high price-earnings
ratios. Differences in accounting methods make it difficult to compare the
earnings of Japanese companies with those of companies in other countries,
especially the U.S. In general, however, reported net income in Japan is
understated relative to U.S. accounting standards and this is one reason
price-earnings ratios of the stocks of Japanese companies have tended
historically to be higher than those of U.S. stocks. In addition, Japanese
companies have tended to have higher growth rates than U.S. companies, and
Japanese interest rates have generally been lower than U.S. interest rates.
These factors have contributed to lower discount rates and higher price-
earnings ratios in Japan than in the U.S.
 
  During the recent past the average stock market prices of Japanese
companies, as measured by major indices such as the NIKKEI 225 Average, have
experienced a substantial decline. It is not possible to determine whether
this general decline will continue.
 
  RISKS OF INVESTING IN FIXED-INCOME SECURITIES. When interest rates decline,
the market value of fixed- income securities tends to increase. Conversely,
when interest rates increase, the market value of fixed income securities
tends to decline. Volatility of a security's market value will differ
depending upon the security's duration, the issuer and the type of instrument.
Investments in fixed-income securities are subject to the risk that the issuer
could default on its obligations and a Fund could sustain losses on such
investments. A default could impact both interest and principal payments.
 
  RISKS OF DERIVATIVE TRANSACTIONS. A Fund's transactions, if any, in options,
futures, options on futures, swaps, structured securities and currency
transactions involve certain risks, including a possible lack of correlation
between changes in the value of hedging instruments and the portfolio assets
(if any) being hedged, the potential illiquidity of the markets for derivative
instruments, the risks arising from margin requirements and related leverage
factors associated with such transactions. The use of these management
techniques to seek to increase total return may be regarded as a speculative
practice and involves the risk of loss if the Investment Adviser is incorrect
in its expectation of fluctuations in securities prices, interest rates or
currency prices. A Fund's use of certain derivative transactions may be
limited by the requirements of the Internal Revenue Code of 1986, as amended
(the "Code"), for qualification as a regulated investment company.
 
                                      27
<PAGE>
 
 
                            INVESTMENT RESTRICTIONS
 
  Each Fund is subject to certain investment restrictions that are described
in detail under "Investment Restrictions" in the Additional Statement.
Fundamental investment restrictions of a Fund cannot be changed without
approval of a majority of the outstanding shares of that Fund as defined in
the Additional Statement. Each Fund's investment objectives and all policies
not specifically designated as fundamental are non-fundamental and may be
changed without shareholder approval. If there is a change in a Fund's
investment objectives, shareholders should consider whether that Fund remains
an appropriate investment in light of their then current financial positions
and needs.
 
 
                              PORTFOLIO TURNOVER
 
  A high rate of portfolio turnover (100% or more) involves correspondingly
greater expenses which must be borne by a Fund and its shareholders. See
"Financial Highlights" for a statement of the historical portfolio turnover
rate of each Fund (other than the Japanese Equity and International Small Cap
Funds). It is anticipated that the annual portfolio turnover rates of the
Japanese Equity and International Small Cap Funds will generally not exceed
75%. The portfolio turnover rate is calculated by dividing the lesser of the
dollar amount of sales or purchases of portfolio securities by the average
monthly value of a Fund's portfolio securities, excluding securities having a
maturity at the date of purchase of one year or less. The Investment Adviser
will not consider the portfolio turnover rate a limiting factor in making
investment decisions for a Fund consistent with the Fund's investment
objectives and portfolio management policies.
 
 
                                  MANAGEMENT
 
TRUSTEES AND OFFICERS
 
  The Trustees are responsible for deciding matters of general policy and
reviewing the actions of the Investment Advisers, distributor and transfer
agent. The officers of the Trust conduct and supervise the Funds' daily
business operations. The Additional Statement contains information as to the
identity of, and other information about, the Trustees and officers of the
Trust.
 
INVESTMENT ADVISERS
 
  INVESTMENT ADVISERS. Goldman Sachs Asset Management, One New York Plaza, New
York, New York 10004, a separate operating division of Goldman Sachs, serves
as the investment adviser to the CORE International Equity Fund. Goldman Sachs
registered as an investment adviser in 1981. Goldman Sachs Asset Management
International, 133 Peterborough Court, London EC4A 2BB, England, an affiliate
of Goldman Sachs, serves as the investment adviser to the International
Equity, Japanese Equity, International Small Cap, Emerging Markets Equity and
Asia Growth Funds. Goldman Sachs Asset Management International became a
member of the Investment Management Regulatory Organisation Limited in 1990
and registered as an investment adviser in 1991. The Goldman Sachs Group,
L.P., which controls the Investment Advisers, has announced that it will
pursue an initial public offering of the firm during the fourth quarter of
1998; if the public offering is consummated, The Goldman Sachs Group, L.P.
will merge into the new public company, which will be called The Goldman Sachs
Group, Inc. As of July 24, 1998, GSAM and GSAMI, together with their
affiliates, acted as investment adviser or distributor for assets in excess of
$168 billion.
 
                                      28
<PAGE>
 
  Under a Management Agreement with each Fund, the applicable Investment
Adviser, subject to the general supervision of the Trustees, provides day-to-
day advice as to the Fund's portfolio transactions. Goldman Sachs has agreed
to permit the Funds to use the name "Goldman Sachs" or a derivative thereof as
part of each Fund's name for as long as a Fund's Management Agreement is in
effect.
 
  In performing its investment advisory services, each Investment Adviser,
while remaining ultimately responsible for the management of the Funds, is
able to draw upon the research and expertise of its asset management
affiliates for portfolio decisions and management with respect to certain
portfolio securities. In addition, the Investment Adviser will have access to
the research of, and certain proprietary technical models developed by,
Goldman Sachs and may apply quantitative and qualitative analysis in
determining the appropriate allocations among the categories of issuers and
types of securities.
 
  Under the Management Agreement, each Investment Adviser also: (i) supervises
all non-advisory operations of each Fund; (ii) provides personnel to perform
such executive, administrative and clerical services as are reasonably
necessary to provide effective administration of each Fund; (iii) arranges for
at each Fund's expense (a) the preparation of all required tax returns, (b)
the preparation and submission of reports to existing shareholders, (c) the
periodic updating of prospectuses and Additional Statements and (d) the
preparation of reports to be filed with the SEC and other regulatory
authorities; (iv) maintains each Fund's records; and (v) provides office space
and all necessary office equipment and services.
 
 FUND MANAGERS
 
 
<TABLE>
<CAPTION>
                                                              YEARS
                                                              PRIMARILY
           NAME AND TITLE          FUND RESPONSIBILITY        RESPONSIBLE FIVE YEAR EMPLOYMENT HISTORY
           --------------          -------------------        ----------- ----------------------------
  <C>                              <C>                        <C>         <S>
  Anna G. Antici                   Portfolio Manager--           Since      Ms. Antici joined the
   Vice President                  Emerging Markets              1998       Investment Adviser in
                                                                            1997. From 1974 to 1997,
                                                                            she was a Vice President
                                                                            for HSBC Asset
                                                                            Management, where she
                                                                            was a portfolio manager
                                                                            for emerging markets and
                                                                            head of the Latin
                                                                            American Department. In
                                                                            1993, she was a senior
                                                                            research analyst for
                                                                            Baring Securities.
- ------------------------------------------------------------------------------------------------------
  Robert A. Beckwitt               Senior Portfolio Manager--    Since      Mr. Beckwitt joined the
   Vice President and              Emerging Markets Equity       1997       Investment Adviser in
   Co-Head Emerging Market                                                  1996. From 1986 to 1996,
   Equities                                                                 he was Chief Investment
                                                                            Strategist-Portfolio
                                                                            Adviser to high net
                                                                            worth investors at
                                                                            Fidelity Investments.
- ------------------------------------------------------------------------------------------------------
  Guy P. de C. Bennett             Portfolio Manager--           Since      Mr. Bennett joined the
   Vice President                  International Equity          1997       Investment Adviser in
                                   Senior Portfolio Manager                 1996 and is also co-head
                                   Japanese Equity               1998       of GSAM's Japanese
                                                                            Equity Group in Tokyo.
                                                                            From 1984 to 1996, he
                                                                            was a portfolio manager
                                                                            and an Executive
                                                                            Director at CIN
                                                                            Management.
- ------------------------------------------------------------------------------------------------------
  Melissa Brown                    Senior Portfolio Manager--    Since      Ms. Brown joined the
   Vice President                  CORE International Equity     1998       Investment Adviser in
                                                                            1998. From 1984 to 1998,
                                                                            she was the director of
                                                                            Quantitative Equity
                                                                            Research and served on
                                                                            the Investment Policy
                                                                            Committee at Prudential
                                                                            Securities.
- ------------------------------------------------------------------------------------------------------
  Mark M. Carhart                  Senior Portfolio Manager--    Since      Mr. Carhart joined the
   Vice President                  CORE International Equity     1998       Investment Adviser in
                                                                            1997, as a member of the
                                                                            Quantitative Research
                                                                            and Risk Management
                                                                            team. From August 1995
                                                                            to September 1997, he
                                                                            was Assistant Professor
                                                                            of Finance at the
                                                                            Marshall School of
                                                                            Business at USC and a
                                                                            Senior Fellow of the
                                                                            Wharton Financial
                                                                            Institutions Center.
</TABLE>
 
 
                                      29
<PAGE>
 
 
<TABLE>
<CAPTION>
                                                  YEARS
                                                  PRIMARILY
     NAME AND TITLE    FUND RESPONSIBILITY        RESPONSIBLE FIVE YEAR EMPLOYMENT HISTORY
     --------------    -------------------        ----------- ----------------------------
  <C>                  <C>                        <C>         <S>
  Kent A. Clark        Senior Portfolio Manager--    Since      Mr. Clark joined the
   Vice President      CORE International Equity     1997       Investment Adviser in
                                                                1992.
- ------------------------------------------------------------------------------------------
  Ivor H. Farman       Portfolio Manager--           Since      Mr. Farman joined the
   Executive Director  International Equity          1996       Investment Adviser in
                                                                1996. From 1995 to 1996,
                                                                he was responsible for
                                                                originating and
                                                                marketing French equity
                                                                ideas at Exane in Paris.
                                                                From 1994 to 1995, he
                                                                was engaged in French
                                                                equity research and
                                                                marketing at Banque
                                                                Nationale de Paris and
                                                                Schroders in London.
- ------------------------------------------------------------------------------------------
  Paul Greener         Portfolio Manager--           Since      Mr. Greener joined the
   Associate           CORE International Equity     1998       Investment Adviser in
                                                                1996 as a member of the
                                                                U.K. and European Equity
                                                                Team responsible for
                                                                European general
                                                                retailers, business
                                                                services and technology
                                                                sectors. Prior to
                                                                joining GSAM, he was an
                                                                equity analyst for two
                                                                years at CIN Management.
- ------------------------------------------------------------------------------------------
  James P. Hordern     Portfolio Manager--           Since      Mr. Hordern joined the
   Executive Director  International Small Cap       1998       Investment Adviser in
                                                                1997. From 1991 to 1997,
                                                                he was an Assistant
                                                                Director and portfolio
                                                                manager at Mercury Asset
                                                                Management on the
                                                                European Specialist
                                                                Team.
- ------------------------------------------------------------------------------------------
  Raymond J. Iwanowski Portfolio Manager--           Since      Mr. Iwanowski joined the
   Vice President      CORE International Equity     1988       Investment Adviser in
                                                                1998. Prior to joining
                                                                the Investment Adviser,
                                                                he spent three years at
                                                                Salomon Brothers, where
                                                                he was a Vice President
                                                                and head of the Fixed
                                                                Derivatives Client
                                                                Research group.
- ------------------------------------------------------------------------------------------
  Robert C. Jones      Senior Portfolio Manager--    Since      Mr. Jones joined the
   Managing Director   CORE International Equity     1997       Investment Adviser in
                                                                1989. From 1987 to 1989,
                                                                he was the senior
                                                                quantitative analyst in
                                                                the Goldman, Sachs & Co.
                                                                Investment Research
                                                                Department.
- ------------------------------------------------------------------------------------------
  Shigeka Kouda        Portfolio Manager--           Since      Mr. Kouda joined the
   Vice President      Japanese Equity               1998       Investment Adviser in
                                                                1997. From 1992 to 1997,
                                                                he was at the Fixed
                                                                Income Division of
                                                                Goldman Sachs (Japan)
                                                                Limited, where he was
                                                                extensively involved in
                                                                emerging markets trading
                                                                as well as International
                                                                Fixed Income
                                                                institutional sales.
- ------------------------------------------------------------------------------------------
  Ralf Laier           Portfolio Manager--           Since      Mr. Laier joined the
   Vice President      Emerging Markets              1998       Investment Adviser in
                                                                1997 and is a portfolio
                                                                manager with a focus on
                                                                Central/Eastern Europe
                                                                (CEE) and the
                                                                Commonwealth of
                                                                Independent States
                                                                (CIS). Prior to joining
                                                                the Investment Adviser,
                                                                from 1995 to 1997, he
                                                                was Vice President of
                                                                Soros Global Research
                                                                where he analyzed
                                                                investment opportunities
                                                                in CEE/CI. From 1994 to
                                                                1995, he achieved a
                                                                Ph.D. from the Academy
                                                                of Economics in Pozan,
                                                                Poland, and from 1992 to
                                                                1994 he worked for the
                                                                Polish Ministry of
                                                                Privatization as a
                                                                Project Director
                                                                developing privatization
                                                                strategies for several
                                                                industry sectors.
- ------------------------------------------------------------------------------------------
</TABLE>
 
 
                                       30
<PAGE>
 
 
<TABLE>
<CAPTION>
                                                     YEARS
                                                     PRIMARILY
      NAME AND TITLE      FUND RESPONSIBILITY        RESPONSIBLE FIVE YEAR EMPLOYMENT HISTORY
      --------------      -------------------        ----------- ----------------------------
  <C>                     <C>                        <C>         <S>
  Alice Lui               Portfolio Manager--           Since      Ms. Lui joined the
   Vice President         Asia Growth                   1994       Investment Adviser
                                                                   in 1990. Prior to 1990,
                                                                   she was a management
                                                                   consultant with Andersen
                                                                   Consulting in Hong Kong.
- ---------------------------------------------------------------------------------------------
  Shogo Maeda             Portfolio Manager--           Since      Mr. Maeda joined the
   Managing Director      International Equity          1994       Investment Adviser in
                          International Small Cap       1998       1994. From 1987 to 1994,
                          Senior Portfolio Manager--               he worked at Nomura
                          Japanese Equity               1998       Investment Management
                                                                   Incorporated as a Senior
                                                                   Portfolio Manager.
- ---------------------------------------------------------------------------------------------
  Susan Noble             Senior Portfolio Manager--    Since      Ms. Noble joined the
   Executive Director     International Equity          1998       Investment Adviser in
                                                                   October 1997 as Senior
                                                                   Portfolio Manager and
                                                                   head of the European
                                                                   Equity team. From 1986
                                                                   to 1997, she worked at
                                                                   Fleming Investment
                                                                   Management in London,
                                                                   where she most recently
                                                                   was Portfolio Management
                                                                   Director for the
                                                                   European equity
                                                                   investment strategy and
                                                                   process.
- ---------------------------------------------------------------------------------------------
  Warwick M. Negus        Senior Portfolio Manager--    Since      Mr. Negus joined the
   Managing Director and  Asia Growth                   1994       Investment Adviser in
   Co-Head Emerging       Portfolio Manager--                      1994. From 1987 to 1994,
   Market                 International Equity          1994       he was a Vice President
   Equities               Emerging Markets Equity       1997       of Bankers Trust
                          International Small Cap       1998       Australia Ltd where he
                                                                   was the Chief Investment
                                                                   Officer of their
                                                                   Southeast Asian
                                                                   investment team. He is
                                                                   also a member of Goldman
                                                                   Sachs Asset Management's
                                                                   global asset allocation
                                                                   committee.
- ---------------------------------------------------------------------------------------------
  Ebru Ozsezgin           Portfolio Manager--           Since      Ms. Ozsezgin joined the
   Vice President         Emerging Markets              1998       Investment Adviser in
                                                                   1997 and is a portfolio
                                                                   manager with a focus on
                                                                   the Mediterranean and
                                                                   Middle East region. From
                                                                   1996 to 1997, she was a
                                                                   portfolio manager at
                                                                   Foreign & Colonial,
                                                                   responsible for Middle
                                                                   East investments. From
                                                                   1994 to 1996, she was a
                                                                   fund manager with
                                                                   Framlington Investment
                                                                   Management. From 1990 to
                                                                   1994, she was a manager
                                                                   at Global Securities
                                                                   Ltd.
- ---------------------------------------------------------------------------------------------
  Victor H. Pinter        Senior Portfolio Manager--    Since      Mr. Pinter joined the
   Vice President         CORE International Equity     1997       Investment Adviser in
                                                                   1990. From 1985 to 1990,
                                                                   he was a project manager
                                                                   in the Information
                                                                   Technology Division of
                                                                   the Investment Adviser.
- ---------------------------------------------------------------------------------------------
  Ramakrishna Shankar     Portfolio Manager--           Since      Mr. Shankar joined the
   Vice President         Asia Growth                   1997       Investment Adviser in
                          Emerging Markets Equity       1998       1997. From July 1996 to
                                                                   1997, he worked for
                                                                   Goldman, Sachs & Co. in
                                                                   Singapore as a strategic
                                                                   advisor for transactions
                                                                   involving infrastructure
                                                                   industries in Asia. From
                                                                   1988 to 1996, he worked
                                                                   at Goldman, Sachs & Co.
                                                                   as an investment banker
                                                                   in the Investment
                                                                   Banking Division.
- ---------------------------------------------------------------------------------------------
  Miyako Shibamoto        Portfolio Manager--           Since      Ms. Shibamoto joined the
   Vice President         Japanese Equity               1998       Japanese Equity team in
                                                                   March 1998. From 1993 to
                                                                   1998, she was a Vice
                                                                   President at Scudder
                                                                   Stevens and Clark
                                                                   (Japan).
</TABLE>
 
 
                                       31
<PAGE>
 
 
<TABLE>
<CAPTION>
                                       YEARS
                                       PRIMARILY
   NAME AND TITLE  FUND RESPONSIBILITY RESPONSIBLE FIVE YEAR EMPLOYMENT HISTORY
   --------------  ------------------- ----------- ----------------------------
  <C>              <C>                 <C>         <S>
  Andrew Shrimpton Portfolio Manager--    Since      Mr. Shrimpton joined the
   Vice President  Emerging Markets       1998       Investment Adviser in
                                                     1996, and is a portfolio
                                                     manager with a focus on
                                                     Africa as well as the
                                                     financial industry in
                                                     the EMEA region. Prior
                                                     to joining the
                                                     Investment Adviser,
                                                     since 1985, he was a UK
                                                     equity analyst and
                                                     portfolio manager for
                                                     CIN Management, where he
                                                     initiated CIN
                                                     Management's first
                                                     investments in Latin
                                                     America.
- -------------------------------------------------------------------------------
  Robert Stewart   Portfolio Manager--    Since      Mr. Stewart joined the
   Vice President  Japanese Equity        1998       Investment Adviser in
                                                     1996. From 1994 to 1996,
                                                     he was at CIN Management
                                                     as a portfolio manager,
                                                     managing Japanese
                                                     equities.
- -------------------------------------------------------------------------------
  Takeya Suzuki    Portfolio Manager--    Since      Mr. Suzuki joined the
   Vice President  Japanese Equity        1998       Investment Adviser in
                                                     1996. From 1990 to 1996,
                                                     he was a Japanese equity
                                                     portfolio manager at
                                                     Nomura Investment
                                                     Management where he
                                                     actively managed assets
                                                     for U.S. pension funds.
</TABLE>
 
 
  It is the responsibility of the Investment Adviser to make the investment
decisions for a Fund and to place the purchase and sale orders for the Fund's
portfolio transactions in U.S. and foreign markets. Such orders may be
directed to any broker including, to the extent and in the manner permitted by
applicable law, Goldman Sachs or its affiliates. In effecting purchases and
sales of portfolio securities for the Funds, the Investment Adviser will seek
the best price and execution of a Fund's orders. In doing so, where two or
more brokers or dealers offer comparable prices and execution for a particular
trade, consideration may be given to whether the broker or dealer provides
investment research or brokerage services or sells Shares of any Goldman Sachs
Fund. See the Additional Statement for a further description of the Investment
Adviser's brokerage allocation practices.
 
  As compensation for its services rendered and assumption of certain expenses
pursuant to separate Management Agreements, GSAM and GSAMI are entitled to the
following fees, computed daily and payable monthly at the annual rates listed
below:
<TABLE>
<CAPTION>
                                                               FOR THE FISCAL
                                                CONTRACTUAL YEAR OR PERIOD ENDED
                                                   RATE*     JANUARY 31, 1998*
                                                ----------- --------------------
     <S>                                        <C>         <C>
     GSAM
    --------
     CORE International Equity ................    0.85%           0.75%
     GSAMI
    ---------
     International Equity......................    1.00%           0.90%
     Japanese Equity...........................    1.00%             N/A
     International Small Cap...................    1.20%             N/A
     Emerging Markets Equity...................    1.20%           1.10%
     Asia Growth...............................    1.00%           0.86%
</TABLE>
- ---------------------
*All numbers are annualized. The difference, if any, between the stated fees
and the actual fees paid by the Funds reflects that the applicable Investment
Adviser did not charge the full amount of the fees to which it would have been
entitled. Effective September 1, 1998, the management fee for the CORE
International Equity, International Equity, Emerging Markets Equity and Asia
Growth Funds will equal 0.85%, 1.00%, 1.20% and 1.00%, respectively.
 
                                      32
<PAGE>
 
  The Investment Adviser has voluntarily agreed to reduce or limit certain
"Other Expenses" of the Funds (excluding management fees, service fees,
transfer agency fees, taxes, interest and brokerage fees and litigation,
indemnification and other extraordinary expenses) to the extent such expenses
exceed 0.12%, 0.10%, 0.01%, 0.16%, 0.15% and 0.16% per annum of the average
daily net assets of the CORE International Equity, International Equity,
Japanese Equity, International Small Cap, Emerging Markets Equity and Asia
Growth Funds, respectively. Such reductions or limits, if any, may be
discontinued or modified by the applicable Investment Adviser in its
discretion at any time.
 
  ACTIVITIES OF GOLDMAN SACHS AND ITS AFFILIATES AND OTHER ACCOUNTS MANAGED BY
GOLDMAN SACHS. The involvement of the Investment Adviser, Goldman Sachs and
their affiliates in the management of, or their interest in, other accounts
and other activities of Goldman Sachs may present conflicts of interest with
respect to a Fund or limit a Fund's investment activities. Goldman Sachs and
its affiliates engage in proprietary trading and advise accounts and funds
which have investment objectives similar to those of the Funds and/or which
engage in and compete for transactions in the same type of securities,
currencies and instruments as the Funds. Goldman Sachs and its affiliates will
not have any obligation to make available any information regarding their
proprietary activities or strategies, or the activities or strategies used for
other accounts managed by them, for the benefit of the management of the
Funds. The results of a Fund's investment activities, therefore, may differ
from those of Goldman Sachs and its affiliates and it is possible that a Fund
could sustain losses during periods in which Goldman Sachs and its affiliates
and other accounts achieve significant profits on their trading for
proprietary or other accounts. In addition, the Funds may, from time to time,
enter into transactions in which other clients of Goldman Sachs have an
adverse interest. From time to time, a Fund's activities may be limited
because of regulatory restrictions applicable to Goldman Sachs and its
affiliates, and/or their internal policies designed to comply with such
restrictions. See "Management--Activities of Goldman Sachs and its Affiliates
and Other Accounts Managed by Goldman Sachs" in the Additional Statement for
further information.
 
DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs, 85 Broad Street, New York, New York 10004, serves as the
exclusive distributor (the "Distributor") of each Fund's Shares. Goldman
Sachs, 4900 Sears Tower, Chicago, Illinois 60606, also serves as each Fund's
transfer agent (the "Transfer Agent") and as such performs various shareholder
servicing functions. Shareholders with inquiries regarding a Fund should
contact Goldman Sachs (as Transfer Agent) at the address or the telephone
number set forth on the back cover page of this Prospectus. Goldman Sachs is
entitled to receive a transfer agency fee with respect to each Fund's
Institutional and Service Shares equal, on an annual basis, to 0.04% of
average daily net assets.
 
  From time to time, Goldman Sachs or any of its affiliates may purchase and
hold Shares of the Funds. Goldman Sachs reserves the right to redeem at any
time some or all of the Shares acquired for its own account.
 
YEAR 2000
 
  Many computer systems were designed using only two digits to signify the
year (for example, "98" for "1998"). On January 1, 2000, if these computer
systems are not corrected, they may incorrectly interpret "00" as the year
"1900" rather than the year "2000," leading to computer shutdowns or errors
(commonly known as the "Year 2000 Problem"). To the extent these systems
conduct forward-looking calculations, these computer problems may occur prior
to January 1, 2000. Like other investment companies and financial and business
organizations, the Funds could be adversely affected in their ability to
process securities trades, price securities, provide shareholder account
services and otherwise conduct normal business operations if the computer
systems
 
                                      33
<PAGE>
 
used by the Investment Adviser or other Fund service providers do not
adequately address this problem in a timely manner. The Investment Adviser has
established a dedicated group to analyze these issues and to implement the
systems modifications necessary to prepare for the Year 2000 Problem.
Currently, the Investment Adviser does not anticipate that the transition to
the 21st Century will have any material impact on its ability to continue to
service the Funds at current levels. In addition, the Investment Adviser has
sought assurances from the Funds' other service providers that they are taking
the steps necessary so that they do not experience Year 2000 Problems, and the
Investment Adviser will continue to monitor the situation. At this time,
however, no assurance can be given that the actions taken by the Investment
Adviser and the Funds' other service providers will be sufficient to avoid any
adverse effect on the Funds due to the Year 2000 Problem.
 
 
                                   EXPENSES
 
  The Funds are responsible for the payment of their expenses. The expenses
include, without limitation, the fees payable to the Investment Adviser;
custodial and transfer agency fees; service fees paid to Service
Organizations; brokerage fees and commissions; filing fees for the
registration or qualification of the Fund's Shares under federal or state
securities laws; organizational expenses; fees and expenses incurred in
connection with membership in investment company organizations; taxes;
interest; costs of liability insurance, fidelity bonds or indemnification, any
costs, expenses or losses arising out of any liability of, or claim for
damages or other relief asserted against, the Funds for violation of any law;
legal and auditing fees and expenses (including the cost of legal and certain
accounting services rendered by employees of the Investment Adviser and its
affiliates with respect to the Funds); expenses of preparing and setting in
type prospectuses, Additional Statements, proxy material, reports and notices
and the printing and distributing of the same to shareholders and regulatory
authorities; compensation and expenses of the Trust's "non-interested"
Trustees; and extraordinary organizational expenses, if any, incurred by the
Trust.
 
 
                                NET ASSET VALUE
 
  The NAV per Share of each Class of a Fund is calculated by the Fund's
custodian as of the close of regular trading on the New York Stock Exchange
(which is normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m. New York
time), on each Business Day (as such term is defined under "Additional
Information"). The NAV per share of each Class is calculated by determining
the net assets attributed to each Class and dividing by the number of
outstanding Shares of that Class. Portfolio securities are valued based on
market quotations or, if accurate quotations are not readily available, at
fair value as determined in good faith under procedures established by the
Trustees.
 
 
                            PERFORMANCE INFORMATION
 
  From time to time each Fund may publish average annual total return in
advertisements and communications to shareholders or prospective investors.
Average annual total return is determined by computing the average annual
percentage change in value of $1,000 invested at the maximum public offering
price for specified periods ending with the most recent calendar quarter,
assuming reinvestment of all dividends and distributions at NAV.
 
                                      34
<PAGE>
 
The total return calculation assumes a complete redemption of the investment
at the end of the relevant period. Each Fund may also from time to time
advertise total return on a cumulative, average, year-by-year or other basis
for various specified periods by means of quotations, charts, graphs or
schedules. In addition, each Fund may furnish total return calculations based
on investments at various sales charge levels or at NAV. Any performance data
which are based on the NAV per Share would be reduced if any applicable sales
charge were taken into account. In addition to the above, each Fund may from
time to time advertise its performance relative to certain averages,
performance rankings, indices, other information prepared by recognized mutual
fund statistical services and investments for which reliable performance
information is available.
 
  Each Fund's total return will be calculated separately for each Class of
Shares in existence. Because each Class of Shares may be subject to different
expenses, the total return calculations with respect to each Class of Shares
for the same period will differ. See "Shares of the Trust."
 
  The Funds' performance quotations do not reflect any fees charged by a
Service Organization to its customer accounts in connection with investments
in the Funds. The investment results of a Fund will fluctuate over time and
any presentation of investment results for any prior period should not be
considered a representation of what an investment may earn or what the Fund's
performance may be in any future period. In addition to information provided
in shareholder reports, the Funds may, in their discretion, from time to time
make a list of their holdings available to investors upon request.
 
 
                              SHARES OF THE TRUST
 
  Each Fund is a series of Goldman Sachs Trust, which was formed under the
laws of the State of Delaware on January 28, 1997. Each Fund (except the
Japanese Equity, International Small Cap and CORE International Equity Funds)
was formerly a series of Goldman Sachs Equity Portfolios, Inc., a Maryland
corporation, and was reorganized into the Trust as of April 30, 1997. The
Trustees have authority under the Trust's Declaration of Trust to create and
classify Shares of beneficial interests in separate series, without further
action by shareholders. Additional series may be added in the future. The
Trustees also have authority to classify and reclassify any series or
portfolio of Shares into one or more Classes. Information about the Trust's
other series and classes is contained in separate prospectuses.
 
  When issued, Shares are fully paid and non-assessable. In the event of
liquidation, shareholders of each class are entitled to share pro rata in the
net assets of the applicable Fund available for distribution to the
shareholders of such Class. All Shares, are freely transferable and have no
preemptive, subscription or conversion rights. Shareholders are entitled to
one vote per Share, provided that, at the option of the Trustees, shareholders
will be entitled to a number of votes based upon the NAVs represented by their
shares.
 
  As of April 3, 1998, Goldman Sachs CORE International Equity Fund Omnibus
A/C - Growth and Income Strategy, 4900 Sears Tower, Chicago, IL 60606, was
recordholder of 29.1% CORE International Equity Fund's outstanding shares.
 
  The Trust does not intend to hold annual meetings of shareholders. However,
recordholders may, under certain circumstances, as permitted by the Act,
communicate with other shareholders in connection with requiring a special
meeting of shareholders. The Trustees will call a special meeting of
shareholders for the purpose of electing Trustees if, at any time, less than a
majority of Trustees holding office at the time were elected by shareholders.
 
                                      35
<PAGE>
 
  In the interest of economy and convenience, the Trust does not issue
certificates representing the Funds' Shares. Instead, the Transfer Agent
maintains a record of each shareholder's ownership. Each shareholder receives
confirmation of purchase and redemption orders from the Transfer Agent. Fund
Shares and any dividends and distributions paid by the Funds are reflected in
account statements from the Transfer Agent.
 
 
                                   TAXATION
 
FEDERAL TAXES
 
  Each Fund is treated as a separate entity for tax purposes. The Japanese
Equity and International Small Cap Funds intend to elect and each other Fund
has elected to be treated as a regulated investment company, and each Fund
intends to continue to qualify for such treatment for each taxable year under
Subchapter M of the Code. To qualify as such, a Fund must satisfy certain
requirements relating to the sources of its income, diversification of its
assets and distribution of its income to shareholders. As a regulated
investment company, a Fund will not be subject to federal income or excise tax
on any net investment income and net realized capital gains that are
distributed to its shareholders in accordance with certain timing requirements
of the Code.
 
  Dividends paid by a Fund from net investment income, certain net realized
foreign exchange gains, the excess of net short-term capital gain over net
long-term capital loss and original issue discount or market discount income
will be taxable to shareholders as ordinary income. Distributions out of the
net capital gain (the excess of net long-term capital gain over net short-term
capital loss), if any, of a Fund will be taxed as long-term capital gain,
regardless of the length of time a shareholder has held Shares or whether such
gain was reflected in the price paid for the Shares. These tax consequences
will apply whether distributions are received in cash or reinvested in Shares.
A Fund's dividends that are paid to its corporate shareholders and are
attributable to qualifying dividends such Fund receives from U.S. domestic
corporations may be eligible, in the hands of such corporate shareholders, for
the corporate dividends-received deduction, subject to certain holding period
requirements and debt financing limitations under the Code. Dividends paid by
the Funds are not generally expected to qualify, in the hands of corporate
shareholders, for the corporate dividends-received deduction. Certain
distributions paid by a Fund in January of a given year may be taxable to
shareholders as if received the prior December 31. Shareholders will be
informed annually about the amount and character of distributions received
from the Funds for federal income tax purposes.
 
  Investors should consider the tax implications of buying Shares immediately
prior to a distribution. Investors who purchase Shares shortly before the
record date for a distribution will pay a per Share price that includes the
value of the anticipated distribution and will be taxed on the distribution
even though the distribution represents a return of a portion of the purchase
price.
 
  Redemptions and exchanges of Shares are taxable events.
 
  Individuals and certain other classes of shareholders may be subject to 31%
backup withholding of federal income tax on distributions, redemptions and
exchanges if they fail to furnish their correct taxpayer identification number
and certain certifications required by the Internal Revenue Service or if they
are otherwise subject to backup withholding. Individuals, corporations and
other shareholders that are not U.S. persons under the Code are subject to
different tax rules and may be subject to nonresident alien withholding at the
rate of 30% (or a lower rate provided by an applicable tax treaty, if any) on
amounts treated as ordinary dividends from the Funds.
 
                                      36
<PAGE>
 
  Each Fund may be subject to foreign withholding or other foreign taxes on
income or gain from certain foreign securities. The Funds may elect to pass
such foreign taxes through to their shareholders, who would then take such
taxes into account on their own tax returns. Alternatively, the Funds may
simply deduct such taxes in determining the amounts available for distribution
to shareholders. Generally, the Funds have taken the latter approach and
anticipate that they may continue to do so.
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local
or foreign taxes on payments received from the Funds. A state income (and
possibly local income and/or intangible property) tax exemption may be
available to the extent (if any) a Fund's distributions are derived from
interest on (or, in the case of intangible property taxes, the value of its
assets is attributable to) certain U.S. Government obligations, provided in
some states that certain thresholds for holdings of such obligations and/or
reporting requirements are satisfied. For a further discussion of certain tax
consequences of investing in Shares of the Funds, see "Taxation" in the
Additional Statement. Shareholders are urged to consult their own tax advisers
regarding specific questions as to federal, state and local taxes as well as
to any foreign taxes.
 
 
                            ADDITIONAL INFORMATION
 
  As used in this Prospectus, the term "Business Day" means any day the New
York Stock Exchange is open for trading, which is Monday through Friday except
for holidays. The New York Stock Exchange is closed on the following holidays:
New Year's Day, Dr. Martin Luther King, Jr. Day, Presidents' Day (observed),
Good Friday, Memorial Day (observed), Independence Day, Labor Day,
Thanksgiving Day and Christmas Day.
 
                                      37
<PAGE>
 
 
                            REPORTS TO SHAREHOLDERS
 
 
  Recordholders of Institutional Shares of the Funds will receive an annual
report containing audited financial statements and a semi-annual report. To
eliminate unnecessary duplications, only one copy of such reports may be sent
to recordholders with the same mailing address. Recordholders of Institutional
Shares who desire a duplicate copy of such reports to be mailed to their
residence should contact Goldman Sachs as provided below. Each recordholder of
Institutional Shares will also be provided with a printed confirmation for each
transaction in its account and a quarterly account statement. A year-to-date
statement for any account will be provided upon request made to Goldman Sachs.
The Funds do not generally provide subaccounting services with respect to
beneficial ownership of Institutional Shares.
 
 
                                   DIVIDENDS
 
 
  Each dividend from net investment income and capital gain distributions, if
any, declared by a Fund on its outstanding Institutional Shares will, at the
election of each shareholder, be paid: (i) in cash; or (ii) in additional
Institutional Shares of such Fund. This election should initially be made on a
shareholder's Account Information Form and may be changed upon written notice
to Goldman Sachs at any time prior to the record date for a particular dividend
or distribution. If no election is made, all dividends from net investment
income and capital gain distributions will be reinvested in Institutional
Shares of the applicable Fund.
 
  The election to reinvest dividends and distributions paid by a Fund in
additional Institutional Shares of the Fund will not affect the tax treatment
of such dividends and distributions, which will be treated as received by the
shareholder and then used to purchase Institutional Shares of a Fund.
 
  Each Fund intends that all or substantially all its net investment income and
net capital gains, after reduction by available capital losses, including any
capital losses carried forward from prior years, will be declared as dividends
for each taxable year. Each Fund will pay dividends from net investment income,
and dividends from net realized capital gains, reduced by available capital
losses, at least annually. From time to time, a portion of a Fund's dividends
may constitute a return of capital.
 
  At the time of an investor's purchase of Shares of a Fund, a portion of the
NAV per Share may be represented by undistributed income of the Fund or
realized or unrealized appreciation of the Fund's portfolio securities.
Therefore, subsequent distributions on such Shares from such income or realized
appreciation may be taxable to the investor even if the NAV of the investor's
Shares is, as a result of the distributions, reduced below the cost of such
Shares and the distributions (or portions thereof) represent a return of a
portion of the purchase price.
 
 
                        PURCHASE OF INSTITUTIONAL SHARES
 
 
  Institutional Shares may be purchased on any Business Day at the NAV per
Share next determined after receipt of an order. No sales load will be charged.
Currently, the NAV is determined as of the close of regular trading on the New
York Stock Exchange (which is normally, but not always, 3:00 p.m. Chicago time,
 
                                       38
<PAGE>
 
4:00 p.m. New York time) as described under "Net Asset Value." Purchases of
Institutional Shares of the Funds must be settled within 3 Business Days of the
receipt of a complete purchase order. Payment of the proceeds of redemption of
Shares purchased by check may be delayed for a period of time as described
under "Redemption of Institutional Shares."
 
  Prior to making an initial investment in a Fund, an investor must open an
account with a Fund by furnishing necessary information to the Fund or Goldman
Sachs. An Account Information Form, a copy of which is attached to this
Prospectus, should be used to open such an account. Subsequent purchases may be
made in the manner set forth below.
 
PURCHASE PROCEDURES
 
  Purchases of Institutional Shares may be made by qualified investors by
placing an order with Goldman Sachs at 800-621-2550 and either wiring federal
funds to State Street Bank or initiating an ACH transfer. Purchases may also be
made by check (except that the Trust will not accept a check drawn on a foreign
bank or a third party check) or Federal Reserve draft made payable to "Goldman
Sachs International Equity Funds--Name of Fund and Class of Shares" and should
be directed to "Goldman Sachs International Equity Funds--Name of Fund and
Class of Shares," c/o National Financial Data Services, Inc. ("NFDS"), P.O. Box
419711, Kansas City, MO 64141-6711.
 
MINIMUM INITIAL INVESTMENTS
 
  Institutional Shares of the Fund are offered to: (a) banks, trust companies
or other types of depository institutions investing for their own account or on
behalf of their clients; (b) pension and profit sharing plans, pension funds
and other company-sponsored benefit plans; (c) any state, county, city or any
instrumentality, department, authority or agency thereof; (d) corporations and
other for-profit business organizations with assets of at least $100 million or
publicly traded securities outstanding; (e) "wrap" accounts for the benefit of
clients of broker-dealers, financial institutions or financial planners,
provided that they have entered into an agreement with GSAM specifying
aggregate minimums and certain operating policies and standards; and (f)
registered investment advisers investing for accounts for which they receive
asset-based fees. With respect to these investors, the minimum initial
investment is $1,000,000 in Institutional Shares of a Fund alone or in
combination with other assets under the management of GSAM and its affiliates.
 
  The minimum initial investment in Institutional Shares for (a) individual
investors; (b) qualified non-profit organizations, charitable trusts,
foundations and endowments; and (c) accounts over which GSAM or its advisory
affiliates have investment discretion is $10,000,000.
 
  The foregoing minimum investment requirements may be waived at the discretion
of the Trust's officers. In addition, the minimum investment requirement may be
waived for current and former officers, partners, directors or employees of
Goldman Sachs or any of its affiliates or for other investors at the discretion
of the Trust's officers. No minimum amount is required for subsequent
investments.
 
OTHER PURCHASE INFORMATION
 
  The Trust may authorize certain institutions (including banks, trust
companies, brokers and investment advisers) that provide recordkeeping,
reporting and processing services to their customers to accept on the Trust's
 
                                       39
<PAGE>
 
behalf, purchase, redemption and exchange orders placed by or on behalf of such
customers and, if approved by the Trust, to designate other intermediaries to
accept such orders. In these cases, a Fund will be deemed to have received an
order in proper form by or on behalf of a customer when the order is accepted
by the authorized institution or intermediary on a Business Day, and the order
will be priced at a Fund's NAV per Share next determined after such acceptance.
The institution or intermediary will be responsible for transmitting accepted
orders to the Trust within the period agreed upon by them. A customer should
contact an institution to learn whether it is authorized to accept orders for
the Trust. Such institutions may receive payments from the Funds or Goldman
Sachs for the services provided by them with respect to the Funds'
Institutional Shares. These payments may be in addition to other servicing
and/or sub-transfer agency payments borne by the Funds and their Share Classes.
 
  The Investment Adviser, Distributor, and/or their affiliates also pay
additional compensation, from time to time, out of their assets and not as an
additional charge to the Funds, to selected institutions (including banks,
trust companies, brokers and investment advisers) and other persons in
connection with the sale and/or servicing of Shares of the Funds and other
investment portfolios of the Trust (such as additional payments based on new
sales, amounts exceeding pre-established thresholds, or the length of time
clients' assets have remained in the Trust), and subject to applicable NASD
regulations, contribute to various non-cash and cash incentive arrangements to
promote the sale of Shares, as well as sponsor various educational programs,
sales contests and/or promotions in which participants may receive
reimbursement of expenses, entertainment and prizes such as travel awards,
merchandise, cash, investment research and educational information and related
support materials. This additional compensation can vary among institutions
depending upon such factors as the amounts their clients have invested (or may
invest) in particular portfolios of the Trust, the particular program involved,
or the amount of reimbursable expenses. Additional compensation based on sales
may, but is currently not expected to, exceed .50% (annualized) of the amount
invested. For further information, see the Additional Statement.
 
  The Funds reserve the right to redeem the Institutional Shares of any
shareholder of record whose account balance is less than $50 as a result of
earlier redemptions. Such redemptions will not be implemented if the value of a
recordholder's account falls below the minimum account balance solely as a
result of market conditions. The Trust will give 60 days' prior written notice
to recordholders whose Institutional Shares are being redeemed to allow them to
purchase sufficient additional Institutional Shares of a Fund to avoid such
redemption.
 
  The Funds and Goldman Sachs each reserve the right to reject any specific
purchase order (including exchanges) or to restrict purchases or exchanges by a
particular purchaser (or group of related purchasers). This may occur, for
example, when a purchaser or group of purchasers' pattern of frequent
purchases, sales or exchanges of Institutional Shares of a Fund is evident, or
if purchases, sales or exchanges are, or a subsequent abrupt redemption might
be, of a size that would disrupt management of a Fund.
 
  In the sole discretion of Goldman Sachs, a Fund may accept securities instead
of cash for the purchase of Shares of the Fund. Such purchases will be
permitted only if the Investment Adviser determines that any securities
acquired in this manner are consistent with the Fund's investment objectives,
restrictions and policies and are desirable investments for the Fund.
 
 
                                       40
<PAGE>
 
 
                               EXCHANGE PRIVILEGE
 
 
  Institutional Shares of the Fund may be exchanged for: (i) Institutional
Shares of any other mutual fund sponsored by Goldman Sachs and designated as an
eligible fund for this purpose; and (ii) the corresponding class of any Goldman
Sachs Money Market Fund at the NAV next determined either by writing to Goldman
Sachs, Attention: Goldman Sachs International Equity Funds--Name of Fund and
Class of Shares, c/o GSAM Shareholder Services, 4900 Sears Tower, Chicago,
Illinois 60606 or, if previously elected in the Fund's Account Information
Form, by telephone at 800-621-2550 (7:00 a.m. to 5:30 p.m. Chicago time). A
shareholder should obtain and read the prospectus relating to any other fund
and its Shares and consider its investment objective, policies and applicable
fees before making an exchange. Under the telephone exchange privilege,
Institutional Shares may be exchanged among accounts with different names,
addresses and social security or other taxpayer identification numbers only if
the exchange request is in writing and is received in accordance with the
procedures set forth under "Redemption of Institutional Shares."
 
  In an effort to prevent unauthorized or fraudulent exchanges by telephone,
Goldman Sachs employs reasonable procedures as set forth under "Redemption of
Institutional Shares" to confirm that such instructions are genuine. In times
of drastic economic or market changes the telephone exchange privilege may be
difficult to implement. For federal income tax purposes, an exchange is treated
as a sale of the Institutional Shares surrendered in the exchange on which an
investor may realize a gain or loss, followed by a purchase of Institutional
Shares, or the corresponding class of any Goldman Sachs Money Market Fund
received in the exchange. Shareholders should consult their own tax adviser
concerning the tax consequences of an exchange.
 
  Each exchange which represents an initial investment in a Fund must satisfy
the minimum investment requirements of the Fund into which the Institutional
Shares are being exchanged, except that this requirement may be waived at the
discretion of the officers of the Fund. Exchanges are available only in states
where exchanges may legally be made. The exchange privilege may be materially
modified or withdrawn at any time on 60 days' written notice to Institutional
Shareholders and is subject to certain limitations. See "Purchase of
Institutional Shares."
 
 
                       REDEMPTION OF INSTITUTIONAL SHARES
 
 
  The Funds will redeem their Institutional Shares upon request of a
recordholder of such Shares on any Business Day at the NAV next determined
after receipt of a request in proper form by Goldman Sachs from the
recordholder. (See "Purchase of Institutional Shares--Other Purchase
Information" for a description of limited situations where an institution or
other intermediary may be authorized to accept requests for the Funds.) If
Institutional Shares to be redeemed were recently purchased by check, a Fund
may delay transmittal of redemption proceeds until such time as it has assured
itself that good funds have been collected for the purchase of such
Institutional Shares. This may take up to 15 days. Redemption requests may be
made by a shareholder of record by writing to or calling the Transfer Agent at
the address or telephone number set forth on the back cover of this Prospectus.
A shareholder of record may request redemptions by telephone if the optional
telephone redemption privilege is elected on the Account Information Form
accompanying this Prospectus. It may be difficult to implement redemptions by
telephone in times of drastic economic or market changes.
 
                                       41
<PAGE>
 
  In an effort to prevent unauthorized or fraudulent redemption or exchange
requests by telephone, Goldman Sachs employs reasonable procedures specified by
the Trust to confirm that such instructions are genuine. Among other things,
any redemption request that requires money to go to an account or address other
than that designated on the Account Information Form must be in writing and
signed by an authorized person designated on the Account Information Form. Any
such written request is also confirmed by telephone with both the requesting
party and the designated bank account to verify instructions. Exchanges among
accounts with different names, addresses and social security or other taxpayer
identification numbers must be in writing and signed by an authorized person
designated on the Account Information Form. Other procedures may be implemented
from time to time concerning telephone redemptions and exchanges. If reasonable
procedures are not implemented, the Trust may be liable for any loss due to
unauthorized or fraudulent transactions. In all other cases, neither the Funds,
the Trust nor Goldman Sachs will be responsible for the authenticity of
redemption or exchange instructions received by telephone.
 
  Written requests for redemptions must be signed by each recordholder whose
signature has been guaranteed by a bank, a securities broker or dealer, a
credit union having authority to issue signature guarantees, a savings and loan
association, a building and loan association, a cooperative bank, a federal
savings bank or association, a national securities exchange, a registered
securities association or a clearing agency, provided that such institution
satisfies the standards established by the Transfer Agent.
 
  The Funds will arrange for the proceeds of redemptions effected by any means
to be wired as federal funds to the bank account designated in the
recordholder's Account Information Form or, if the recordholder elects in
writing, by check. Redemption proceeds paid by wire transfer will normally be
wired on the next Business Day in federal funds (for a total one-day delay),
but may be paid up to three Business Days after receipt of a properly executed
redemption request. Wiring of redemption proceeds may be delayed one additional
Business Day if the Federal Reserve Bank is closed on the day redemption
proceeds would originally be wired. Redemption proceeds paid by check will
normally be mailed to the address of record within three Business Days of
receipt of a properly executed redemption request. In order to change the bank
designated on the Account Information Form to receive redemption proceeds, a
written request must be received by the Transfer Agent. This request must be
signature guaranteed as set forth above. Further documentation may be required
for executors, trustees or corporations. Once wire transfer instructions have
been given by Goldman Sachs, neither the Funds, the Trust nor Goldman Sachs
assumes any further responsibility for the performance of intermediaries or the
recordholder's bank in the transfer process. If a problem with such performance
arises, the recordholder should deal directly with such intermediaries or bank.
 
  Additional documentation regarding a redemption by any means may be required
to effect a redemption when deemed appropriate by Goldman Sachs. The request
for such redemption will not be considered to have been received in proper form
until such additional documentation has been received.
 
  Institutions (including banks, trust companies, brokers and investment
advisers) are responsible for the timely transmittal of redemption requests by
their customers to the Transfer Agent. In order to facilitate the timely
transmittal of redemption requests, these institutions have established times
by which redemption requests must be received by them. Additional documentation
may be required when deemed appropriate by an institution.
 
                              --------------------
 
                                       42
<PAGE>
 
 
                                  APPENDIX
 
 
 
   GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON ACCOUNT
                               INFORMATION FORM
 
  You are required by law to provide a Fund with your correct Taxpayer
Identification Number (TIN), regardless of whether you file tax returns.
Failure to do so may subject you to penalties. Failure to provide your correct
TIN and to sign your name in the Certification section of the Account
Information Form could result in withholding of 31% by a Fund for the federal
backup withholding tax on distributions, redemptions, exchanges and other
payments relating to your account.
 
  Any tax withheld may be credited against taxes owed on your federal income
tax return.
 
  If you do not have a TIN, you should apply for one immediately by contacting
your local office of the Social Security Administration or the Internal
Revenue Service (IRS). Backup withholding could also apply to payments
relating to your account prior to a Fund's receipt of your TIN.
 
  Special rules apply for certain entities. For example, for an account
established under a Uniform Gifts or Transfers to Minors Act, the TIN of the
minor should be furnished.
 
  If you have been notified by the IRS that you are subject to backup
withholding because you failed to report all your interest and/or dividend
income on your tax return and you have not been notified by the IRS that such
withholding should cease, you must cross out item (2) in the Certification
section of the Account Information Form.
 
  If you are an exempt recipient, you should furnish your TIN and certify your
exemption by signing the Certification section and writing "exempt" after your
signature. Exempt recipients include: corporations, tax-exempt pension plans
and IRAs, governmental agencies, financial institutions, registered securities
and commodities dealers and others.
 
  If you are a nonresident alien or foreign entity, you must provide a
completed Form W-8 to a Fund in order to avoid backup withholding on certain
payments. Other payments to you may be subject to nonresident alien
withholding of up to 30%.
 
  For further information regarding backup and nonresident alien withholding,
see Sections 3406, 1441 and 1442 of the Code and consult your tax adviser.
 
                                      A-1
<PAGE>
 
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS ASSET
MANAGEMENT
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN SACHS ASSET
MANAGEMENT INTERNATIONAL
133 PETERBOROUGH COURT
LONDON, ENGLAND EC4A 2BB
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR
85 BROAD STREET
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
TRANSFER AGENT
4900 SEARS TOWER
CHICAGO, ILLINOIS 60606
 
STATE STREET BANK AND TRUST COMPANY
CUSTODIAN
1776 HERITAGE DRIVE
NORTH QUINCY, MASSACHUSETTS 02171
 
ARTHUR ANDERSEN LLP
INDEPENDENT PUBLIC ACCOUNTANTS
225 FRANKLIN STREET
BOSTON, MASSACHUSETTS 02110
 
TOLL FREE (IN U.S.) . . . . . . . . 800-621-2550
 
EQINTLPROINS
501414
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS
INTERNATIONAL
EQUITY FUNDS
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
 
INSTITUTIONAL SHARES
 
 
 
LOGO
Goldman
Sachs
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
- --------------------------------------------------------------------------------
 
PROSPECTUS              GOLDMAN SACHS FIXED INCOME FUNDS
March 1, 1998, as revised     INSTITUTIONAL SHARES
 
September 1, 1998
 
GOLDMAN SACHS ADJUSTABLE RATE          GOLDMAN SACHS MUNICIPAL INCOME FUND
GOVERNMENT FUND                        Seeks a high level of current income
                                       that is exempt from regular federal in-
  Seeks a high level of current        come tax, consistent with preservation
  income, consistent with low          of capital. The Fund invests primarily
  volatility of principal. The         in municipal securities.
  Fund invests primarily in ad-
  justable rate mortgage pass-      GOLDMAN SACHS CORE FIXED INCOME FUND
  through securities and other
  mortgage securities with peri-       Seeks a total return consisting of
  odic interest rate resets,           capital appreciation and income that
  which are issued or guaranteed       exceeds the total return of the Lehman
  by the U.S. government, its          Brothers Aggregate Bond Index. The Fund
  agencies, instrumentalities or       invests primarily in fixed-income
  sponsored enterprises.               securities, including securities issued
                                       or guaranteed by the U.S. government,
GOLDMAN SACHS SHORT DURATION           its agencies, instrumentalities or
GOVERNMENT FUND                        sponsored enterprises, corporate
                                       securities, mortgage-backed securities
  Seeks a high level of current        and asset-backed securities.
  income and secondarily, in
  seeking current income, may       GOLDMAN SACHS GLOBAL INCOME FUND
  also consider the potential for    
  capital appreciation. The Fund       Seeks a high total return, emphasizing 
  invests primarily in securities      current income and, to a lesser extent, 
  issued or guaranteed by the          providing opportunities for capital     
  U.S. government, its agencies,       appreciation. The Fund invests          
  instrumentalities or sponsored       primarily in a portfolio of high        
  enterprises.                         quality fixed-income securities of U.S. 
                                       and foreign issuers and foreign         
GOLDMAN SACHS SHORT DURATION           currencies.                             
TAX-FREE FUND                                                                  
                                    GOLDMAN SACHS HIGH YIELD FUND              
  Seeks a high level of current                                                
  income, consistent with rela-        Seeks a high level of current income    
  tively low volatility of prin-       and may also consider the potential for 
  cipal, that is exempt from reg-      capital appreciation. The Fund invests  
  ular federal income tax. The         primarily in fixed-income securities     
  Fund invests primarily in mu-        rated below investment grade.            
  nicipal securities.                                                           
                                                                                
GOLDMAN SACHS GOVERNMENT                                                        
INCOME FUND

  Seeks a high level of current
  income, consistent with safety
  of principal. The Fund invests
  primarily in securities, in-
  cluding mortgage-backed securi-
  ties, issued or guaranteed by
  the U.S. government, its agen-
  cies, instrumentalities or
  sponsored enterprises.
 
  This Prospectus provides information about Goldman Sachs Trust (the "Trust")
and the Funds that a prospective investor should understand before investing.
This Prospectus should be retained for future reference. A Statement of
Additional Information (the "Additional Statement"), dated March 1, 1998, as
revised September 1, 1998, containing further information about the Trust and
the Funds which may be of interest to investors, has been filed with the
Securities and Exchange Commission ("SEC"), is incorporated herein by reference
in its entirety, and may be obtained without charge from Goldman Sachs by
calling the telephone number, or writing to one of the addresses, listed on the
back cover of this Prospectus. The SEC maintains a Web site
(http://www.sec.gov) that contains the Additional Statement and other
information regarding the Trust.
 
INSTITUTIONAL SHARES OF THE FUNDS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR
GUARANTEED OR ENDORSED BY, ANY BANK OR OTHER INSURED DEPOSITORY INSTITUTION,
AND ARE NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL
RESERVE BOARD OR ANY OTHER GOVERNMENT AGENCY. AN INVESTMENT IN A FUND INVOLVES
INVESTMENT RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
                                                       (continued on next page)
<PAGE>
 
(cover continued)
 
  THE ADJUSTABLE RATE GOVERNMENT, SHORT DURATION GOVERNMENT AND GOVERNMENT
INCOME FUNDS' NET ASSET VALUES AND YIELDS ARE NOT GUARANTEED BY THE U.S.
GOVERNMENT OR BY ITS AGENCIES, INSTRUMENTALITIES OR SPONSORED ENTERPRISES.
 
  THE CORE FIXED INCOME, GLOBAL INCOME AND HIGH YIELD FUNDS MAY INVEST IN
SECURITIES OF FOREIGN ISSUERS AND FOREIGN CURRENCIES THAT ENTAIL CERTAIN RISKS
NOT CUSTOMARILY ASSOCIATED WITH INVESTING IN U.S. DOLLAR-DENOMINATED FIXED-
INCOME SECURITIES. IN PARTICULAR, THE SECURITIES MARKETS OF EMERGING MARKET
COUNTRIES ARE LESS LIQUID, ARE SUBJECT TO GREATER PRICE VOLATILITY, HAVE
SMALLER MARKET CAPITALIZATIONS, HAVE LESS GOVERNMENT REGULATION AND ARE NOT
SUBJECT TO AS EXTENSIVE AND FREQUENT ACCOUNTING, FINANCIAL AND OTHER REPORTING
REQUIREMENTS AS THE SECURITIES MARKETS OF MORE DEVELOPED COUNTRIES.
 
  THE HIGH YIELD FUND INVESTS PRIMARILY IN HIGH YIELD, FIXED-INCOME SECURITIES
RATED BELOW INVESTMENT GRADE THAT ARE CONSIDERED SPECULATIVE AND GENERALLY
INVOLVE GREATER PRICE VOLATILITY AND GREATER RISK OF LOSS OF PRINCIPAL AND
INTEREST THAN INVESTMENTS IN HIGHER RATED FIXED-INCOME SECURITIES.
 
  INVESTORS SHOULD CONSIDER THE RISKS ASSOCIATED WITH INVESTMENT IN A FUND
INVESTING IN FOREIGN AND/OR HIGH YIELD SECURITIES. THE FUNDS MAY NOT BE
SUITABLE FOR ALL INVESTORS. SEE "DESCRIPTION OF SECURITIES" AND "RISK
FACTORS."
 
  Goldman Sachs Funds Management, L.P. ("GSFM"), New York, New York, an
affiliate of Goldman, Sachs & Co. ("Goldman Sachs"), serves as investment
adviser to the Adjustable Rate Government and Short Duration Government Funds.
Goldman Sachs Asset Management ("GSAM"), New York, New York, a separate
operating division of Goldman Sachs, serves as investment adviser to the Short
Duration Tax-Free, Government Income, Municipal Income, Core Fixed Income and
High Yield Funds. Goldman Sachs Asset Management International ("GSAMI"),
London, England, an affiliate of Goldman Sachs, serves as investment adviser
to the Global Income Fund. GSAM, GSFM and GSAMI are each referred to in this
Prospectus as the "Investment Adviser." Goldman Sachs serves as each Fund's
distributor and transfer agent.
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                      PAGE
                                      ----
<S>                                   <C>
Fund Highlights......................   1
Fees and Expenses....................   7
Financial Highlights.................   9
Investment Objectives and Policies...  15
Description of Securities............  22
Risk Factors.........................  31
Investment Techniques................  34
Investment Restrictions..............  37
Portfolio Turnover...................  38
Management...........................  38
Dividends............................  42
Expenses.............................  43
</TABLE>
<TABLE>
<CAPTION>
                                                               PAGE
                                                               ----
                         <S>                                   <C>
                         Net Asset Value.....................   44
                         Performance Information.............   44
                         Shares of the Trust.................   45
                         Taxation............................   46
                         Additional Information..............   47
                         Reports to Shareholders.............   48
                         Purchase of Institutional Shares....   48
                         Exchange Privilege..................   51
                         Redemption of Institutional Shares..   51
                         Appendix............................  A-1
                         Account Information Form
</TABLE>
<PAGE>
 
 
                                FUND HIGHLIGHTS
 
   The following is intended to highlight certain information and is
 qualified in its entirety by the more detailed information contained in this
 Prospectus.
 
 WHAT IS THE GOLDMAN SACHS TRUST?
 
   The Goldman Sachs Trust is an open-end management investment company that
 offers its shares in several investment funds (mutual funds). Each Fund
 pools the monies of investors by selling its shares to the public and
 investing these monies in a portfolio of securities designed to achieve that
 Fund's stated investment objectives.
 
 WHAT ARE THE INVESTMENT OBJECTIVES AND POLICIES OF THE FUNDS?
 
   Each Fund has distinct investment objectives and policies. There can be no
 assurance that a Fund's objectives will be achieved. For a further
 description of each Fund's investment objectives and policies, see
 "Investment Objectives and Policies," "Description of Securities" and
 "Investment Techniques."
 
 WHO MANAGES THE FUNDS?
 
   Goldman Sachs Funds Management, L.P. serves as Investment Adviser to the
 Adjustable Rate Government and Short Duration Government Funds. Goldman
 Sachs Asset Management serves as Investment Adviser to the Short Duration
 Tax-Free, Government Income, Municipal Income, Core Fixed Income and High
 Yield Funds. Goldman Sachs Asset Management International serves as
 Investment Adviser to the Global Income Fund. As of July 24, 1998, the
 Investment Advisers, together with their affiliates, acted as investment
 adviser or distributor for assets in excess of $168 billion.
 
 WHO DISTRIBUTES THE FUNDS' SHARES?
 
   Goldman Sachs acts as distributor of each Fund's shares.
 
                                       1
<PAGE>
 
 
<TABLE>
<CAPTION>
                                                          EXPECTED
                                                        APPROXIMATE
                                                          INTEREST
                    INVESTMENT                              RATE
  FUND NAME         OBJECTIVES           DURATION       SENSITIVITY    INVESTMENT SECTOR      CREDIT QUALITY
 --------------------------------------------------------------------------------------------
<S>             <C>                 <C>                 <C>          <C>                   <C>
ADJUSTABLE      A high level of     Target = 6-month    9-month note At least 65% of       U.S. Government
RATE            current income,     to 1-year                        total assets in       Securities
GOVERNMENT      consistent with     U.S. Treasury                    securities issued or
FUND            low volatility      Security                         guaranteed by the
                of principal.       Maximum = 2 years                U.S. government,
                                                                     its agencies,
                                                                     instrumentalities
                                                                     or sponsored
                                                                     enterprises
                                                                     ("U.S. Government
                                                                     Securities'')
                                                                     that are adjustable
                                                                     rate mortgage
                                                                     pass-through
                                                                     securities and
                                                                     other mortgage
                                                                     securities with
                                                                     periodic interest
                                                                     rate resets.
 --------------------------------------------------------------------------------------------
SHORT DURATION  A high level of     Target = 2-year     2-year bond  At least 65% of       U.S. Government
GOVERNMENT      current income,     U.S. Treasury                    total assets in       Securities
FUND            and secondarily,    Security plus                    U.S. Government
                in seeking current  or minus .5 years                Securities
                income, may also    Maximum = 3 years                and repurchase
                consider the poten-                                  agreements
                tial for capital                                     collateralized
                appreciation.                                        by such securities.
 --------------------------------------------------------------------------------------------
SHORT DURATION  A high level of     Target = Lehman     3-year bond  At least 80% of       Minimum = BBB/Baa
TAX-FREE        current income,     Brothers                         net assets in
FUND            consistent with     3-year Municipal                 municipal securities.
                low volatility      Bond Index
                of principal,       plus or minus
                that is exempt      .5 years
                from regular        Maximum = 4 years
                federal
                income tax.
 --------------------------------------------------------------------------------------------
GOVERNMENT      A high level of     Target = Lehman     5-year bond  At least 65% of total U.S. Government
INCOME          current income,     Brothers Mutual                  assets in U.S.        Securities; non-U.S.
FUND            consistent with     Fund Government/                 Government            Government
                safety of           Mortgage Index                   Securities, including Securities =
                principal.          plus or minus                    mortgage-backed       AAA/Aaa
                                    1 year                           U.S. Government
                                    Maximum = 6 years                Securities and
                                                                     repurchase
                                                                     agreements
                                                                     collateralized by
                                                                     U.S. Government
                                                                     Securities.
<CAPTION>
  FUND NAME      OTHER INVESTMENTS      BENCHMARK
 --------------------------------------------------------------------------------------------
<S>             <C>                 <C>
ADJUSTABLE      Fixed-rate          6-month and
RATE            mortgage            1-year U.S.
GOVERNMENT      pass-through        Treasury Security
FUND            securities and
                repurchase
                agreements
                collateralized by
                U.S. Government
                Securities.
 --------------------------------------------------------------------------------------------
SHORT DURATION  Mortgage pass-      2-year U.S.
GOVERNMENT      through             Treasury Security
FUND            securities and
                other securities
                representing an
                interest in or
                collateralized
                by mortgage loans.
 --------------------------------------------------------------------------------------------
SHORT DURATION  U.S. Government     Lehman Brothers
TAX-FREE        Securities          3-Year Municipal
FUND            and repurchase      Bond Index
                agreements
                collateralized
                by such securities.
 --------------------------------------------------------------------------------------------
GOVERNMENT      Non-government      Lehman Brothers
INCOME          mortgage pass-      Mutual Fund
FUND            through securities, Government/
                asset-backed        Mortgage Index
                securities and
                corporate
                fixed-income
                securities.
</TABLE>
 
                                       2
<PAGE>
 
 
<TABLE>
<CAPTION>
                                                         EXPECTED
                                                       APPROXIMATE
                                                         INTEREST
                  INVESTMENT                               RATE
 FUND NAME        OBJECTIVES            DURATION       SENSITIVITY    INVESTMENT SECTOR
 -----------------------------------------------------------------------------------------
<S>          <C>                  <C>                  <C>          <C>
MUNICIPAL    A high level of      Target = Lehman      15-year bond At least 80% of
INCOME       current income       Brothers 15-year                  net assets in
FUND         that is exempt       Municipal Bond                    municipal securities.
             from regular         Index plus
             federal income       or minus 1 year
             tax, consistent      Maximum = 12 years
             with preservation
             of capital.
 -----------------------------------------------------------------------------------------
CORE FIXED   Total return         Target = Lehman      5-year bond  At least 65% of
INCOME FUND  consisting           Brothers                          assets in fixed-income
             of capital           Aggregate Bond                    securities, including
             appreciation         Index plus or                     U.S. Government
             and income that      minus 1 year                      Securities, corporate,
             exceeds the total    Maximum = 6 years                 mortgage-backed
             return of the                                          and asset-backed
             Lehman Brothers                                        securities.
             Aggregate Bond
             Index.
 -----------------------------------------------------------------------------------------
GLOBAL       A high total return, Target = J.P. Morgan 6-year bond  Securities of U.S.
INCOME       emphasizing current  Global Government                 and foreign
FUND         income, and, to a    Bond Index                        governments and
             lesser extent,       (hedged)                          corporations.
             providing            plus or minus
             opportunities        2.5 years
             for capital          Maximum = 7.5 years
             appreciation.
 -----------------------------------------------------------------------------------------
HIGH YIELD   A high level of      Target = Lehman      6-year bond  At least 65% of
FUND         current income       Brothers High                     assets in fixed-
             and capital          Yield Bond Index                  income securities
             appreciation.        plus or minus                     rated below
                                  2.5 years                         investment grade,
                                  Maximum =7.5 years                including U.S. and
                                                                    non-U.S. dollar
                                                                    corporate debt,
                                                                    foreign government
                                                                    securities,
                                                                    convertible
                                                                    securities
                                                                    and preferred stock.
<CAPTION>
 FUND NAME     CREDIT QUALITY      OTHER INVESTMENTS       BENCHMARK
 -----------------------------------------------------------------------------------------
<S>          <C>                 <C>                    <C>
MUNICIPAL    Minimum = BBB/Baa   U.S. Government        Lehman Brothers
INCOME       Average = AA/Aa     Securities and         15-Year
FUND                             repurchase             Municipal
                                 agreements             Bond Index
                                 collateralized by
                                 such securities.
 -----------------------------------------------------------------------------------------
CORE FIXED   Minimum = BBB/Baa   Foreign fixed-         Lehman Brothers
INCOME FUND  Minimum for non-    income,                Aggregate Bond
             dollar securities = municipal and          Index
             AA/Aa               convertible
                                 securities,
                                 foreign currencies
                                 and repurchase
                                 agreements
                                 collateralized
                                 by U.S.
                                 Government
                                 Securities.
 -----------------------------------------------------------------------------------------
GLOBAL       Minimum =  BBB/Baa  Mortgage and asset-    J.P. Morgan
INCOME       At least 50% =      backed securities,     Global
FUND         AAA/Aaa             foreign currencies     Government Bond
                                 and repurchase         Index (hedged)
                                 agreements
                                 collateralized by
                                 U.S. Government
                                 Securities or
                                 certain foreign
                                 government securities.
 -----------------------------------------------------------------------------------------
HIGH YIELD   At least 65% =      Mortgage-backed        Lehman Brothers
FUND         BB/Ba or below      and asset-backed       High Yield
                                 securities, U.S.       Bond Index
                                 Government
                                 Securities,
                                 investment grade
                                 corporate fixed-
                                 income securities,
                                 structured
                                 securities,
                                 foreign currencies
                                 and repurchase
                                 agreements
                                 collateralized by
                                 U.S. Government
                                 Securities.
</TABLE>
 
 
                                       3
<PAGE>
 
 
 
 WHAT ARE THE RISK FACTORS AND SPECIAL CHARACTERISTICS THAT I SHOULD CONSIDER
 BEFORE INVESTING?
 
   Each Fund's share price will fluctuate with market, economic and, with
 respect to the Core Fixed Income, Global Income and High Yield Funds,
 foreign exchange conditions, so that an investment in any of the Funds may
 be worth more or less when redeemed than when purchased. None of the Funds
 should be relied upon as a complete investment program. There can be no
 assurance that a Fund's investment objectives will be achieved. See "Risk
 Factors."
 
   Interest Rate Risk. When interest rates decline, the market value of
 fixed-income securities tends to increase. Conversely, when interest rates
 increase, the market value of fixed-income securities tends to decline.
 Volatility of a security's market value will differ depending upon the
 security's duration, the issuer and the type of instrument.
 
   Default Risk/Credit Risk. Investments in fixed-income securities are
 subject to the risk that the issuer could default on its obligations, and a
 Fund could sustain losses on such investments. A default could impact both
 interest and principal payments.
 
   Call Risk and Extension Risk. Fixed-income securities may be subject to
 both call risk and extension risk. Call risk (i.e., where the issuer
 exercises its right to pay principal on an obligation earlier than
 scheduled) causes cash flow to be returned earlier than expected. Call risk
 typically results when interest rates have declined. Under such
 circumstances a Fund may be unable to recoup all of its initial investment
 and will also suffer from having to reinvest in lower yielding securities.
 Extension risk (i.e., where the issuer exercises its right to pay principal
 on an obligation later than scheduled) causes cash flows to be returned
 later than expected. Extension risk typically results when interest rates
 have increased. Under such circumstances, a Fund will suffer from the
 inability to invest in higher yielding securities. The investment
 characteristics of Mortgage-Backed Securities (including adjustable rate
 mortgage securities) and Asset-Backed Securities differ from those of
 traditional fixed-income securities because they generally have both call
 risk (also known as prepayment risk) and extension risk.
 
   Tax Risk of Municipal Securities. Because of their tax-exempt status, the
 yields and market values of municipal securities may be more adversely
 impacted by changes in tax rates and policies than taxable fixed-income
 securities.
 
   Risks of investing in non-investment grade fixed-income securities. Non-
 investment grade fixed-income securities (commonly referred to as "junk
 bonds") are subject to greater volatility and risk of loss and are less
 liquid than securities which are perceived to be of higher credit quality.
 Such securities, also referred to as high yield securities, are considered
 to be speculative by traditional investment standards. High yield securities
 are subject to increased risk of an issuer's inability to meet principal and
 interest payments. The High Yield Fund may invest in securities which are in
 default at the time of investment. The market for non-investment grade
 securities tends to be concentrated in a limited number of market makers,
 which may affect liquidity. In addition, the market price of such securities
 tends to reflect individual corporate developments to a greater extent than
 that of higher rated securities which react primarily to the general level
 of interest rates.
 
   Foreign Risks. Investments in securities of foreign issuers and currencies
 involve risks that are different from those associated with investments in
 domestic securities. The risks associated with foreign investments and
 currencies include changes in relative currency exchange rates, political
 and economic developments, the imposition of exchange controls, confiscation
 and other governmental restrictions. In addition, the securities
 
                                       4
<PAGE>
 
 markets of foreign countries are generally less liquid and subject to
 greater price volatility. To the extent that the Core Fixed Income, Global
 Income and High Yield Funds invest in emerging markets and countries, these
 risks may be heightened.
 
   Other. A Fund's use of certain investment techniques, including
 derivatives, forward contracts, options, futures and swap transactions, will
 subject the Fund to greater risk than funds that do not employ such
 techniques.
 
   Diversified and Non-Diversified Funds. Each Fund, other than the Global
 Income Fund, is a "diversified open-end management company" as defined under
 the Investment Company Act of 1940, as amended (the "Act"). The Global
 Income Fund is a "non-diversified" open-end management company as defined
 under the Act, and is, therefore, subject only to certain federal tax
 diversification requirements (to which the other Funds are also subject), in
 addition to the policies adopted by the Investment Adviser. To the extent
 that the Fund is not diversified under the Act, it will be more susceptible
 to adverse developments affecting any single issuer of portfolio securities.
 See "Investment Restrictions."
 
 WHAT IS THE MINIMUM INVESTMENT?
 
   The minimum initial investment for the Adjustable Rate Government, Short
 Duration Government, Short Duration Tax-Free and Core Fixed Income Funds is
 $50,000 in Institutional Shares of a Fund alone or in combination with
 Institutional Shares (or the corresponding class) of any other mutual fund
 sponsored by Goldman Sachs and designated as an eligible fund for this
 purpose. The minimum initial investment for the Government Income, Municipal
 Income, Global Income and High Yield Funds is either $1,000,000 or
 $10,000,000 depending upon an investor's eligibility.
 
 HOW DO I PURCHASE INSTITUTIONAL SHARES?
 
   You may purchase Institutional Shares of the Funds through Goldman Sachs.
 Institutional Shares are purchased at the current net asset value without
 any sales load. See "Purchase of Institutional Shares."
 
 HOW DO I SELL MY INSTITUTIONAL SHARES?
 
   You may redeem Institutional Shares upon request on any Business Day, as
 defined under "Additional Information," at the net asset value next
 determined after receipt of such request in proper form. See "Redemption of
 Institutional Shares."
 
                                       5
<PAGE>
 
 
 HOW DO I RECEIVE DIVIDENDS AND DISTRIBUTIONS?
 
<TABLE>
<CAPTION>
                                               INVESTMENT INCOME
                                                   DIVIDENDS
                                               ------------------ CAPITAL GAINS
    FUND                                       DECLARED    PAID   DISTRIBUTIONS
    ----                                       ------------------ -------------
  <S>                                          <C>       <C>      <C>
  Adjustable Rate Government.................. Daily     Monthly  Annually
  Short Duration Government................... Daily     Monthly  Annually
  Short Duration Tax-Free..................... Daily     Monthly  Annually
  Government Income........................... Daily     Monthly  Annually
  Municipal Income............................ Daily     Monthly  Annually
  Core Fixed Income........................... Daily     Monthly  Annually
  Global Income............................... Monthly   Monthly  Annually
  High Yield.................................. Daily     Monthly  Annually
</TABLE>
 
   Recordholders of Institutional Shares may receive dividends in additional
 Institutional Shares of the Fund in which they have invested or may elect to
 receive cash. For further information concerning dividends, see "Dividends."
 
                                       6
<PAGE>
 
 
                   FEES AND EXPENSES (INSTITUTIONAL SHARES)
 
 
 
<TABLE>
<CAPTION>
                          ADJUSTABLE   SHORT     SHORT                         CORE
                             RATE     DURATION  DURATION GOVERNMENT MUNICIPAL FIXED  GLOBAL HIGH
                          GOVERNMENT GOVERNMENT TAX-FREE   INCOME    INCOME   INCOME INCOME YIELD
                             FUND       FUND      FUND      FUND      FUND     FUND   FUND  FUND
                          ---------- ---------- -------- ---------- --------- ------ ------ -----
<S>                       <C>        <C>        <C>      <C>        <C>       <C>    <C>    <C>
SHAREHOLDER TRANSACTION
 EXPENSES:
 Maximum Sales Charge
  Imposed on Purchases..     none       none      none      none      none     none   none  none
 Maximum Sales Charge
  Imposed on Reinvested
  Dividends.............     none       none      none      none      none     none   none  none
 Redemption Fees........     none       none      none      none      none     none   none  none
 Exchange Fees..........     none       none      none      none      none     none   none  none
ANNUAL FUND OPERATING EXPENSES: (as
 a percentage of average daily net
 assets)/1/
 Management Fees (after
  applicable limita-
  tions)/2/.............     0.40%      0.50%     0.35%     0.54%     0.50%    0.40%  0.65% 0.70%
 Distribution Fees......     none       none      none      none      none     none   none  none
 Other Expenses (after
  applicable
  limitations)/3/.......     0.09%      0.04%     0.04%     0.04%     0.04%    0.14%  0.04% 0.06%
                             ----       ----      ----      ----      ----     ----   ----  ----
TOTAL FUND OPERATING
 EXPENSES (after fee and
 expense
 limitations)/4/........     0.49%      0.54%     0.39%     0.58%     0.54%    0.54%  0.69% 0.76%
                             ====       ====      ====      ====      ====     ====   ====  ====
</TABLE>
EXAMPLE
 
  You would pay the following expenses on a hypothetical $1,000 investment
assuming (i) a 5% annual return and (ii) redemption at the end of each time
period.
 
<TABLE>
<CAPTION>
   FUND                                          1 YEAR 3 YEARS 5 YEARS 10 YEARS
   ----                                          ------ ------- ------- --------
<S>                                              <C>    <C>     <C>     <C>
Adjustable Rate Government......................  $ 5     $16     $27     $62
Short Duration Government.......................  $ 6     $17     $30     $68
Short Duration Tax-Free.........................  $ 4     $13     $22     $49
Government Income...............................  $ 6     $19     $32     $73
Municipal Income................................  $ 6     $17     $30     $68
Core Fixed Income...............................  $ 6     $17     $30     $68
Global Income...................................  $ 7     $22     $38     $86
High Yield......................................  $ 8     $24     $42     $94
</TABLE>
- --------
/1/ The Funds' annual operating expenses have been restated to reflect fees
    and expenses in effect as of September 1, 1998.
/2/ The Investment Adviser has voluntarily agreed that a portion of the
    management fee would not be imposed on the Short Duration Tax-Free,
    Government Income, Municipal Income and Global Income Funds equal to
    0.05%, 0.11%, 0.05% and 0.25%, respectively. Without such limitations,
    management fees would be 0.40%, 0.65%, 0.55% and 0.90% of each Fund's
    average daily net assets, respectively.
/3/ The Investment Adviser has voluntarily agreed to reduce or limit certain
    other expenses (excluding management fees, transfer agency fees (equal to
    0.04% of the average daily net assets of each Fund's Institutional
    Shares), taxes, interest and brokerage fees and litigation,
    indemnification and other extraordinary expenses) to the extent such
    expenses exceed 0.05%, 0.00%, 0.00%, 0.00%, 0.00% 0.10%, 0.00% and 0.02%
    of the average daily net assets of the Adjustable Rate Government, Short
    Duration Government, Short Duration Tax-Free, Government Income, Municipal
    Income, Core Fixed Income, Global Income and High Yield Funds,
    respectively.
 
                                       7
<PAGE>
 
/4/Without the limitations described above, "Other Expenses" and "Total
  Operating Expenses" of the Institutional Shares of the Funds would be as set
  forth below:
 
<TABLE>
<CAPTION>
                                                         OTHER   TOTAL OPERATING
                                                        EXPENSES    EXPENSES
                                                        -------- ---------------
   <S>                                                  <C>      <C>
   Adjustable Rate Government..........................  0.12%        0.52%
   Short Duration Government...........................  0.26%        0.76%
   Short Duration Tax-Free.............................  0.63%        1.03%
   Government Income...................................  0.41%        1.06%
   Municipal Income....................................  0.35%        0.90%
   Core Fixed Income...................................  0.34%        0.74%
   Global Income.......................................  0.18%        1.08%
   High Yield..........................................  0.37%        1.07%
</TABLE>
 
  The Investment Adviser and Goldman Sachs may modify or discontinue any of
the limitations set forth above in the future at their discretion. The
information set forth in the foregoing table and hypothetical example relates
only to Institutional Shares of the Funds. Each Fund also offers Service and
Class A Shares and, with the exception of the Adjustable Rate Government Fund,
Class B and Class C Shares. The Adjustable Rate Government, Short Duration
Government, Short Duration Tax-Free and Core Fixed Income Funds also offer
Administration Shares. The other classes of the Funds are subject to different
fees and expenses (which affect performance), have different minimum
investment requirements and are entitled to different services. Information
regarding any other class of the Funds may be obtained from your sales
representative or from Goldman Sachs by calling the number on the back cover
page of this Prospectus.
 
  Institutions that invest in Institutional Shares on behalf of their
customers may charge fees directly to their customer accounts in connection
with their investments. Such fees, if any, may affect the return such
customers realize with respect to their investments.
 
  Certain institutions that invest in Institutional Shares on behalf of their
customers may receive certain compensation in connection with the sale and
distribution of such Shares or for services to their customers' accounts
and/or the Funds. For additional information regarding such compensation, see
"Purchase of Institutional Shares" in this Prospectus and the Additional
Statement.
 
  The purpose of the foregoing table is to assist investors in understanding
the various fees and expenses of a Fund that an investor will bear directly or
indirectly. The information on the fees and expenses included in the table and
the hypothetical example above are based on each Fund's fees and expenses
(actual or estimated) and should not be considered as representative of past
or future expenses. Actual fees and expenses may be greater or less than those
indicated. Moreover, while the example assumes a 5% annual return, a Fund's
actual performance will vary and may result in an actual return greater or
less than 5%. See "Management --Investment Advisers."
 
                                       8
<PAGE>
 
                             FINANCIAL HIGHLIGHTS
 
         SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD
 
  The following data has been audited by Arthur Andersen LLP, independent
public accountants, as indicated in their report incorporated by reference
into the Additional Statement from the Annual Report to shareholders of the
Funds for the year ended October 31, 1997 (the "Annual Report"). This
information should be read in conjunction with the financial statements and
related notes incorporated by reference and attached to the Additional
Statement. The Annual Report also contains performance information and is
available upon request and without charge by calling the telephone number or
writing to one of the addresses on the back cover of this Prospectus.
<TABLE>
<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                           ---------------------------------------------------
                                        NET REALIZED       NET
                                            AND          REALIZED
                                         UNREALIZED        AND
                                        GAIN (LOSS)     UNREALIZED    TOTAL
                                             ON        GAIN (LOSS)    INCOME
                 NET ASSET              INVESTMENT,     ON FOREIGN    (LOSS)
                 VALUE AT     NET        OPTION AND      CURRENCY      FROM    
                 BEGINNING INVESTMENT     FUTURES        RELATED    INVESTMENT 
                 OF PERIOD   INCOME     TRANSACTIONS   TRANSACTIONS OPERATIONS 
                 --------- ----------   ------------   ------------ ---------- 
                                 ADJUSTABLE RATE GOVERNMENT FUND                      
- -----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>          <C>            <C>          <C>        
FOR THE YEARS ENDED OCTOBER 31,
- -------------
1997-
Institutional
Shares..........  $ 9.83    $0.5914(a)    $ 0.0494 (a)     --        $0.6408               
1997-                                                                                      
Administration                                                                             
Shares..........    9.83     0.5665(a)      0.0497 (a)     --         0.6162               
1997-Service                                                                               
Shares(m).......    9.84     0.3298(a)      0.0400 (a)     --         0.3698               
1997-Class A                                                                               
Shares..........    9.83     0.5662(a)      0.0500 (a)     --         0.6162               
1996-                                                                                      
Institutional                                                                              
Shares..........    9.77     0.5759(a)      0.0772 (a)     --         0.6531               
1996-                                                                                      
Administration                                                                             
Shares..........    9.77     0.5489(a)      0.0797 (a)     --         0.6286               
1996-Class A                                                                               
Shares..........    9.77     0.5481(a)      0.0806 (a)     --         0.6287               
1995-                                                                                      
Institutional                                                                              
Shares..........    9.74     0.5630(a)      0.0717 (a)     --         0.6347               
1995-                                                                                      
Administration                                                                             
Shares..........    9.74     0.5366(a)      0.0737 (a)     --         0.6103               
1995-Class A                                                                               
Shares(c).......    9.79     0.2721(a)     (0.0090)(a)     --         0.2631               
1994-                                                                                      
Institutional                                                                              
Shares..........   10.00     0.4341(a)     (0.2455)(a)     --         0.1886               
1994-                                                                                      
Administration                                                                             
Shares..........   10.00     0.4211(a)     (0.2572)(a)     --         0.1639               
1993-                                                                                      
Institutional                                                                              
Shares..........   10.04     0.4397(a)     (0.0376)(a)     --         0.4021               
1993-                                                                                      
Administration                                                                             
Shares(e).......   10.02     0.2146(a)     (0.0173)(a)     --         0.1973               
1992-                                                                                      
Institutional                                                                              
Shares..........   10.03     0.5599(a)     (0.0029)(a)     --         0.5570               
FOR THE PERIOD JULY 17, 1991(G) THROUGH OCTOBER 31,
- -------------------
1991-
Institutional
Shares..........   10.00     0.1531(a)      0.0322(a)      --         0.1853              
- -----------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                                      
                                         DISTRIBUTIONS TO SHAREHOLDERS                                
                 -------------------------------------------------------------------------            
                                                         IN EXCESS                                    
                                  FROM NET                 OF NET                                     
                                  REALIZED                REALIZED                            NET     
                                  GAIN ON                 GAIN ON                           INCREASE  
                                INVESTMENT,  IN EXCESS  INVESTMENT,   FROM       TOTAL     (DECREASE) 
                  FROM NET       OPTION AND    OF NET    OPTION AND   PAID   DISTRIBUTIONS   IN NET   
                 INVESTMENT       FUTURES    INVESTMENT   FUTURES      IN         TO         ASSET    
                   INCOME       TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL SHAREHOLDERS    VALUE    
                 ----------     ------------ ---------- ------------ ------- ------------- ----------  
                                 ADJUSTABLE RATE GOVERNMENT FUND                      
- ------------------------------------------------------------------------------------------------------------------------------------
<S>              <C>            <C>          <C>        <C>          <C>     <C>            <C> 
FOR THE YEARS ENDED OCTOBER 31,                                                       
- -------------                                                                         
1997-                                                                                 
Institutional                                                                         
Shares..........   $(0.5908)       --            --        --         --      $(0.5908)    $ 0.0500   
1997-                                                                                                 
Administration                                                                                        
Shares..........    (0.5662)       --            --        --         --       (0.5662)      0.0500   
1997-Service                                                                                          
Shares(m).......    (0.3298)       --            --        --         --       (0.3298)      0.0400   
1997-Class A                                                                                          
Shares..........    (0.5662)       --            --        --         --       (0.5662)      0.0500   
1996-                                                                                                 
Institutional                                                                                         
Shares..........    (0.5725)       --        (0.0206)      --         --       (0.5931)      0.0600   
1996-                                                                                                 
Administration                                                                                        
Shares..........    (0.5489)       --        (0.0198)      --         --       (0.5687)      0.0600   
1996-Class A                                                                                          
Shares..........    (0.5489)       --        (0.0198)      --         --       (0.5687)      0.0600   
1995-                                                                                                 
Institutional                                                                                         
Shares..........    (0.5759)       --        (0.0287)      --         --       (0.6046)      0.0301   
1995-                                                                                                 
Administration                                                                                        
Shares..........    (0.5528)       --        (0.0275)      --         --       (0.5803)      0.0300   
1995-Class A                                                                                          
Shares(c).......    (0.2697)       --        (0.0134)      --         --       (0.2831)     (0.0200)  
1994-                                                                                                 
Institutional                                                                                         
Shares..........    (0.4486)       --            --        --         --       (0.4486)     (0.2600)  
1994-                                                                                                 
Administration                                                                                        
Shares..........    (0.4239)       --            --        --         --       (0.4239)     (0.2600)  
1993-                                                                                                 
Institutional                                                                                         
Shares..........    (0.4397)       --        (0.0024)      --         --       (0.4421)     (0.0400)  
1993-                                                                                                 
Administration                                                                                        
Shares(e).......    (0.2146)       --        (0.0027)      --         --       (0.2173)     (0.0200)  
1992-                                                                                                 
Institutional                                                                                         
Shares..........    (0.5470)       --            --        --         --       (0.5470)      0.0100    
FOR THE PERIOD JULY 17, 1991(G) THROUGH OCTOBER 31,                                   
- -------------------                                                                   
1991-                                                                                 
Institutional                                                                         
Shares..........    (0.1553)       --            --        --         --       (0.1553)      0.0300 
- ------------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                              RATIOS ASSUMING NO
                                                                              VOLUNTARY WAIVER OF
                                                                                FEES OR EXPENSE
                                                                                  LIMITATIONS
                                                                              --------------------
                 
                                   RATIO OF
                  NET                NET      RATIO OF                        RATIO OF   RATIO OF
                 ASSET             EXPENSES     NET                    NET    EXPENSES     NET
                 VALUE                TO     INVESTMENT             ASSETS AT    TO     INVESTMENT
                 AT END            AVERAGE   INCOME TO  PORTFOLIO    END OF   AVERAGE   INCOME TO
                   OF     TOTAL      NET      AVERAGE   TURNOVER     PERIOD     NET      AVERAGE
                 PERIOD RETURN(K)   ASSETS   NET ASSETS  RATE(D)    (IN 000S)  ASSETS   NET ASSETS
                 ------ ---------- --------- ---------- ----------- --------- --------- ----------
                                 ADJUSTABLE RATE GOVERNMENT FUND
- -----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>     <C>        <C>      <C>         <C>        <C>        <C>      <C>        
FOR THE YEARS ENDED OCTOBER 31,
- -------------
1997-
Institutional
Shares..........  $ 9.88   6.70%      0.49%      5.99%     46.58%    $ 463,511   0.52%      5.96%
1997-            
Administration   
Shares..........    9.88   6.43       0.74       5.73      46.58         2,793   0.77       5.70
1997-Service     
Shares(m).......    9.88   3.81(f)    1.05(b)    5.64(b)   46.58(f)        346   1.08(b)    5.61(b)
1997-Class A     
Shares..........    9.88   6.43       0.74       5.60      46.58        43,393   1.02       5.32
1996-            
Institutional    
Shares..........    9.83   6.86       0.45       5.85      52.36       613,149   0.51       5.79
1996-            
Administration   
Shares..........    9.83   6.60       0.70       5.59      52.36         3,792   0.76       5.53
1996-Class A     
Shares..........    9.83   6.60       0.70       5.59      52.36        10,728   1.01       5.28
1995-            
Institutional    
Shares..........    9.77   6.75       0.46       5.77      24.12       657,358   0.53       5.70
1995-            
Administration   
Shares..........    9.77   6.48       0.71       5.50      24.12         3,572   0.78       5.43
1995-Class A     
Shares(c).......    9.77   2.74(f)    0.69(b)    5.87(b)   24.12(f)     15,203   1.01(b)    5.55(b)
1994-            
Institutional    
Shares..........    9.74   1.88       0.46       4.38      37.81       942,523   0.49       4.35
1994-            
Administration   
Shares..........    9.74   1.63       0.71       4.27      37.81         6,960   0.74       4.24
1993-            
Institutional    
Shares..........   10.00   4.13       0.45       4.36     103.74     2,760,871   0.48       4.33
1993-            
Administration   
Shares(e).......   10.00   2.01(f)    0.70(b)    3.81(b)  103.74(f)      5,326   0.73(b)    3.78(b)
1992-            
Institutional    
Shares..........   10.04   6.12       0.42       5.61     286.40     2,145,064   0.55       5.48
FOR THE PERIOD JULY 17, 1991(G) THROUGH OCTOBER 31,
- -------------------
1991-
Institutional
Shares..........   10.03   2.14(f)    0.20(b)    7.31(b)  145.67(f)    239,642   1.02(b)    6.49(b)
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>
 
                                       9
<PAGE>
 
<TABLE>
<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                           ---------------------------------------------------
                                        NET REALIZED       NET
                                            AND          REALIZED
                                         UNREALIZED        AND
                                        GAIN (LOSS)     UNREALIZED    TOTAL
                                             ON        GAIN (LOSS)    INCOME
                 NET ASSET              INVESTMENT,     ON FOREIGN    (LOSS)
                 VALUE AT     NET        OPTION AND      CURRENCY      FROM     FROM NET
                 BEGINNING INVESTMENT     FUTURES        RELATED    INVESTMENT INVESTMENT
                 OF PERIOD   INCOME     TRANSACTIONS   TRANSACTIONS OPERATIONS   INCOME
                 --------- ----------   ------------   ------------ ---------- ----------
                                  SHORT DURATION GOVERNMENT FUND
- -----------------------------------------------------------------------------------------
<S>              <C>       <C>          <C>            <C>          <C>        <C>
FOR THE YEARS ENDED OCTOBER 31,
- -----------------
1997-
Institutional
Shares..........  $ 9.83    $0.6412(a)    $ 0.0300(a)      --        $ 0.6712   $(0.6412)
1997-
Administration
Shares..........    9.85     0.6183(a)      0.0400(a)      --          0.6583    (0.6183)
1997-Service
Shares..........    9.82     0.5904(a)      0.0401(a)      --          0.6305    (0.5904)
1997-Class A
Shares(o).......    9.78     0.3121(a)      0.0883(a)      --          0.4004    (0.3004)
1997-Class B
Shares(o).......    9.75     0.2787(a)      0.1011(a)      --          0.3798    (0.2698)
1997-Class C
Shares(p).......    9.83     0.1185(a)      0.0225(a)      --          0.1410    (0.1110)
1996-
Institutional
Shares..........    9.82     0.6290(a)      0.0136(a)      --          0.6426    (0.6326)
1996-
Administration
Shares(h).......    9.86     0.3837(a)      0.0003(a)      --          0.3840    (0.3940)
1996-Service
Shares(i).......    9.72     0.3134(a)      0.1018(a)      --          0.4152    (0.3152)
1995-
Institutional
Shares..........    9.64     0.6652(a)      0.1666(a)      --          0.8318    (0.6518)
1995-
Administration
Shares..........    9.64     0.2384(a)     (0.0433)(a)     --          0.1951    (0.2051)
1994-
Institutional
Shares..........   10.14     0.5628(a)     (0.4592)(a)     --          0.1036    (0.5598)
1994-
Administration
Shares..........   10.14     0.5329(a)     (0.4539)(a)     --          0.0790    (0.5352)
1993-
Institutional
Shares..........   10.16     0.5627(a)     (0.0135)(a)     --          0.5492    (0.5627)
1993-
Administration
Shares(e).......   10.23     0.2725(a)     (0.0900)(a)     --          0.1825    (0.2725)
1992-
Institutional
Shares..........   10.22     0.6703(a)     (0.0600)(a)     --          0.6103    (0.6703)
1991-
Institutional
Shares..........   10.00     0.8020(a)      0.2200(a)      --          1.0220    (0.8020)
1990-
Institutional
Shares..........   10.07     0.8300(a)     (0.0700)(a)     --          0.7600    (0.8300)
1989-
Institutional
Shares..........   10.10     0.8800(a)         --          --          0.8800    (0.8800)
FOR THE PERIOD AUGUST 15, 1988(G) THROUGH OCTOBER 31,
- -----------------------------
1988-
Institutional
Shares..........   10.00     0.1800(a)      0.1000(a)      --          0.2800    (0.1800)
- ------------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                                                                                 
                                                                                                                                 
                                                                                                                                 
                          DISTRIBUTIONS TO SHAREHOLDERS                                                                          
                 -----------------------------------------------------------                                                     
                                          IN EXCESS                                                                              
                   FROM NET                 OF NET                                                           RATIO OF            
                   REALIZED                REALIZED                             NET      NET                   NET      RATIO OF 
                   GAIN ON                 GAIN ON                            INCREASE  ASSET                EXPENSES     NET    
                 INVESTMENT,  IN EXCESS  INVESTMENT,   FROM        TOTAL     (DECREASE) VALUE                   TO     INVESTMENT
                  OPTION AND    OF NET    OPTION AND   PAID    DISTRIBUTIONS   IN NET   AT END               AVERAGE   INCOME TO 
                   FUTURES    INVESTMENT   FUTURES      IN          TO         ASSET      OF        TOTAL      NET      AVERAGE  
                 TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL  SHAREHOLDERS    VALUE    PERIOD    RETURN(K)   ASSETS   NET ASSETS
                 ------------ ---------- ------------ -------- ------------- ---------- --------- ---------- --------- ----------
                                                  SHORT DURATION GOVERNMENT FUND  
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>          <C>        <C>          <C>      <C>           <C>        <C>       <C>        <C>       <C>       
FOR THE YEARS ENDED OCTOBER 31,                                                                                                  
- -----------------                                                                                                                
1997-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --     $(0.6412)    $ 0.0300  $ 9.86       7.07%     0.45%      6.43%  
1997-                                                                                                                            
Administration                                                                                                                   
Shares..........       --          --        --           --      (0.6183)      0.0400    9.89       6.91      0.70       6.19   
1997-Service                                                                                                                     
Shares..........       --          --        --           --      (0.5904)      0.0401    9.86       6.63      0.95       5.92   
1997-Class A                                                                                                                     
Shares(o).......       --          --        --           --      (0.3004)      0.1000    9.88       4.14(f)   0.70(b)    6.05(b)
1997-Class B                                                                                                                     
Shares(o).......       --          --        --           --      (0.2698)      0.1100    9.86       3.94(f)   1.30(b)    5.52(b)
1997-Class C                                                                                                                     
Shares(p).......       --          --        --           --      (0.1110)      0.0300    9.86       1.44(f)   1.45(b)    5.52(b)
1996-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --      (0.6326)      0.0100    9.83       6.75      0.45       6.44   
1996-                                                                                                                            
Administration                                                                                                                   
Shares(h).......       --          --        --           --      (0.3940)     (0.0100)   9.85       4.00(f)   0.70(b)    5.97(b)
1996-Service                                                                                                                     
Shares(i).......       --          --        --           --      (0.3152)      0.1000    9.82       4.35(f)   0.95(b)    6.05(b)
1995-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --      (0.6518)      0.1800    9.82       8.97      0.45       6.87   
1995-                                                                                                                            
Administration                                                                                                                   
Shares..........       --          --        --           --      (0.2051)     (0.0100)   9.63(h)    2.10      0.70(b)    7.91(b)
1994-                                                                                                                            
Institutional                                                                                                                    
Shares..........   (0.0438)        --        --           --      (0.6036)     (0.5000)   9.64       0.99      0.45       5.69   
1994-                                                                                                                            
Administration                                                                                                                   
Shares..........   (0.0438)        --        --           --      (0.5790)     (0.5000)   9.64       0.73      0.70       5.38   
1993-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --      (0.0065)      --           --      (0.5692)     (0.0200)  10.14       5.55      0.45       5.46   
1993-                                                                                                                            
Administration                                                                                                                   
Shares(e).......       --          --        --           --      (0.2725)     (0.0900)  10.14       1.74(f)   0.70(b)    4.84(b)
1992-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --      (0.6703)     (0.0600)  10.16       6.24      0.45       6.60   
1991-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --      (0.8020)      0.2200   10.22      10.93      0.45       8.25   
1990-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --      (0.8300)     (0.0700)  10.00       8.23      0.45       8.62   
1989-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --       (0.0300)    (0.9100)     (0.0300)  10.07       9.08      0.46       8.71   
FOR THE PERIOD AUGUST 15, 1988(G) THROUGH OCTOBER 31,                                                                            
- -----------------------------                                                                                                    
1988-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --      (0.1800)      0.1000   10.10       3.30(f)   0.55(b)    8.55(b)
- ------------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                      RATIOS ASSUMING NO
                                      VOLUNTARY WAIVER OF
                                        FEES OR EXPENSE
                                          LIMITATIONS
                                      --------------------
                 
                               NET
                              ASSETS  RATIO OF   RATIO OF
                              AT END  EXPENSES     NET
                                OF       TO     INVESTMENT
                 PORTFOLIO    PERIOD  AVERAGE   INCOME TO
                 TURNOVER      (IN      NET      AVERAGE
                  RATE(D)     000S)    ASSETS   NET ASSETS
                 ----------- -------- --------- ----------
                    SHORT DURATION GOVERNMENT FUND
- ----------------------------------------------------------
<S>              <C>         <C>      <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,
- -----------------
1997-            
Institutional    
Shares..........  102.58%    $103,729   0.82%      6.06%
1997-            
Administration   
Shares..........  102.58        1,060   1.07       5.82
1997-Service     
Shares..........  102.58        3,337   1.32       5.55
1997-Class A     
Shares(o).......  102.58(f)     9,491   1.32(b)    5.43(b)
1997-Class B     
Shares(o).......  102.58(f)       747   1.82(b)    5.00(b)
1997-Class C     
Shares(p).......  102.58(f)       190   1.82(b)    5.15(b)
1996-            
Institutional    
Shares..........  115.45       99,944   0.71       6.18
1996-            
Administration   
Shares(h).......  115.45          252   0.96(b)    5.71(b)
1996-Service     
Shares(i).......  115.45        1,822   1.21(b)    5.79(b)
1995-            
Institutional    
Shares..........  292.56      103,760   0.72       6.60
1995-            
Administration   
Shares..........  292.56          --    0.90(b)    7.71(b)
1994-            
Institutional    
Shares..........  289.79      193,095   0.59       5.55
1994-            
Administration   
Shares..........  289.79          730   0.84       5.24
1993-            
Institutional    
Shares..........  411.66      359,708   0.64       5.31
1993-            
Administration   
Shares(e).......  411.66       16,490   0.80(b)    4.74(b)
1992-            
Institutional    
Shares..........  216.07      277,927   0.69       6.36
1991-            
Institutional    
Shares..........  155.44      158,848   0.79       7.91
1990-            
Institutional    
Shares..........  173.21       68,995   0.95       8.12
1989-            
Institutional    
Shares..........  137.37       31,015   1.39       7.78
FOR THE PERIOD AUGUST 15, 1988(G) THROUGH OCTOBER 31,
- -----------------
1988-            
Institutional    
Shares..........  167.00(f)    39,052   1.42(b)    7.68(b)
- -------------------
</TABLE>
 
                                       10
<PAGE>
 
<TABLE>
<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                           -----------------------------------------------------
                                         NET REALIZED        NET
                                             AND           REALIZED
                                          UNREALIZED         AND
                                         GAIN (LOSS)      UNREALIZED    TOTAL
                                              ON         GAIN (LOSS)    INCOME
                 NET ASSET               INVESTMENT,      ON FOREIGN    (LOSS)
                 VALUE AT     NET         OPTION AND       CURRENCY      FROM     FROM NET
                 BEGINNING INVESTMENT      FUTURES         RELATED    INVESTMENT INVESTMENT
                 OF PERIOD   INCOME      TRANSACTIONS    TRANSACTIONS OPERATIONS   INCOME
                 --------- ----------    ------------    ------------ ---------- ----------
                                           SHORT DURATION TAX-FREE FUND
- -------------------------------------------------------------------------------------------
<S>              <C>       <C>           <C>             <C>          <C>        <C>
FOR THE YEARS ENDED OCTOBER 31,
1997-
Institutional
Shares..........  $ 9.96     $0.4181(a)    $ 0.1091(a)       --        $ 0.5272   $(0.4172)
1997-
Administration
Shares..........    9.96      0.3924(a)      0.1100(a)       --          0.5024    (0.3924)
1997-Service
Shares..........    9.97      0.3675(a)      0.1000(a)       --          0.4675    (0.3675)
1997-Class A
Shares(o).......    9.94      0.1950(a)      0.1400(a)       --          0.3350    (0.1950)
1997-Class B
Shares(o).......    9.94      0.1663(a)      0.1368(a)       --          0.3031    (0.1631)
1997-Class C
Shares(p).......   10.04      0.0670(a)      0.0300(a)       --          0.0970    (0.0670)
1996-
Institutional
Shares..........    9.94      0.4192(a)      0.0200(a)       --          0.4392    (0.4192)
1996-
Administration
Shares..........    9.94      0.3944(a)      0.0200(a)       --          0.4144    (0.3944)
1996-Service
Shares..........    9.95      0.3697(a)      0.0200(a)       --          0.3897    (0.3697)
1995-
Institutional
Shares..........    9.79      0.4235(a)      0.1500(a)       --          0.5735    (0.4235)
1995-
Administration
Shares..........    9.79      0.3989(a)      0.1500(a)       --          0.5489    (0.3989)
1995-Service
Shares..........    9.79      0.3744(a)      0.1600(a)       --          0.5344    (0.3744)
1994-
Institutional
Shares..........   10.23      0.3787(a)     (0.3575)(a)      --          0.0212    (0.3787)
1994-
Administration
Shares..........   10.23      0.3537(a)     (0.3575)(a)      --         (0.0038)   (0.3537)
1994-Service
Shares(j).......    9.86      0.0475(a)     (0.0700)(a)      --         (0.0225)   (0.0475)
1993-
Institutional
Shares..........    9.93      0.3834(a)      0.3000(a)       --          0.6834    (0.3834)
1993-
Administration
Shares(j).......   10.16      0.1555(a)      0.0720(a)       --          0.2275    (0.1555)
FOR THE PERIOD OCTOBER 1, 1992(G) THROUGH OCTOBER 31,
1992-
Institutional
Shares..........   10.00   0.0341(a)      . (0.0700)(a)      --         (0.0359)   (0.0341)
- --------------------------------------------------------------------------------------------
<CAPTION>
                                                                                                                               
                                                                                                                               
                                                                                                                               
                          DISTRIBUTIONS TO SHAREHOLDERS                                                                        
                 ----------------------------------------------------------                                                    
                                          IN EXCESS                                                                            
                   FROM NET                 OF NET                                                        RATIO OF             
                   REALIZED                REALIZED                            NET      NET                 NET      RATIO OF  
                   GAIN ON                 GAIN ON                           INCREASE  ASSET              EXPENSES     NET     
                 INVESTMENT,  IN EXCESS  INVESTMENT,   FROM       TOTAL     (DECREASE) VALUE                 TO     INVESTMENT 
                  OPTION AND    OF NET    OPTION AND   PAID   DISTRIBUTIONS   IN NET   AT END             AVERAGE   INCOME TO  
                   FUTURES    INVESTMENT   FUTURES      IN         TO         ASSET      OF     TOTAL       NET      AVERAGE   
                 TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL SHAREHOLDERS    VALUE    PERIOD RETURN(K)    ASSETS   NET ASSETS 
                 ------------ ---------- ------------ ------- ------------- ---------- ------ ----------- --------- ---------- 
                                                  SHORT DURATION TAX-FREE FUND
- -------------------------------------------------------------------------------------------------------------------------------
<S>              <C>          <C>        <C>          <C>     <C>           <C>        <C>    <C>         <C>       <C>        
FOR THE YEARS ENDED OCTOBER 31,                                                                                                
1997-                                                                                                                          
Institutional                                                                                                                  
Shares..........       --        --          --         --      $(0.4172)    $ 0.1100  $10.07    5.40%      0.45%      4.18%   
1997-                                                                                                                          
Administration                                                                                                                 
Shares..........       --        --          --         --       (0.3924)      0.1100   10.07    5.14       0.70       3.91    
1997-Service                                                                                                                   
Shares..........       --        --          --         --       (0.3675)      0.1000   10.07    4.77       0.95       3.66    
1997-Class A                                                                                                                   
Shares(o).......       --        --          --         --       (0.1950)      0.1400   10.08    3.39(f)    0.70(b)    3.81(b) 
1997-Class B                                                                                                                   
Shares(o).......       --        --          --         --       (0.1631)      0.1400   10.08    3.07(f)    1.30(b)    3.31(b) 
1997-Class C                                                                                                                   
Shares(p).......       --        --          --         --       (0.0670)      0.0300   10.07    0.97(f)    1.45(b)    2.60(b) 
1996-                                                                                                                          
Institutional                                                                                                                  
Shares..........       --        --          --         --       (0.4192)      0.0300    9.96    4.50       0.45       4.21    
1996-                                                                                                                          
Administration                                                                                                                 
Shares..........       --        --          --         --       (0.3944)      0.0300    9.96    4.24       0.70       3.96    
1996-Service                                                                                                                   
Shares..........       --        --          --         --       (0.3697)      0.0200    9.97    3.98       0.95       3.74    
1995-                                                                                                                          
Institutional                                                                                                                  
Shares..........       --        --          --         --       (0.4235)      0.1500    9.94    5.98       0.45       4.31    
1995-                                                                                                                          
Administration                                                                                                                 
Shares..........       --        --          --         --       (0.3989)      0.1500    9.94    5.76       0.70       4.14    
1995-Service                                                                                                                   
Shares..........       --        --          --         --       (0.3744)      0.1600    9.95    5.59       0.95       3.87    
1994-                                                                                                                          
Institutional                                                                                                                  
Shares..........   (0.0825)      --          --         --       (0.4612)     (0.4400)   9.79    0.17       0.45       3.74    
1994-                                                                                                                          
Administration                                                                                                                 
Shares..........   (0.0825)      --          --         --       (0.4362)     (0.4400)   9.79   (0.11)      0.70       3.51    
1994-Service                                                                                                                   
Shares(j).......       --        --          --         --       (0.0475)     (0.0700)   9.79   (0.32)(f)   0.95(b)    4.30(b) 
1993-                                                                                                                          
Institutional                                                                                                                  
Shares..........       --        --          --         --       (0.3834)      0.3000   10.23    7.03       0.41       3.70    
1993-                                                                                                                          
Administration                                                                                                                 
Shares(j).......       --        --          --         --       (0.1555)      0.0720   10.23    2.28(f)    0.70(b)    3.32(b) 
FOR THE PERIOD OCTOBER 1, 1992(G) THROUGH OCTOBER 31,                                                                          
1992-                                                                                                                          
Institutional                                                                                                                  
Shares..........       --        --          --         --       (0.0341)     (0.0700)   9.93   (0.34)(f)   0.05(b)    4.58(b) 
<CAPTION>
                                     RATIOS ASSUMING NO
                                     VOLUNTARY WAIVER OF
                                       FEES OR EXPENSE
                                         LIMITATIONS
                                     --------------------
                
                              NET
                             ASSETS  RATIO OF   RATIO OF
                             AT END  EXPENSES     NET
                               OF       TO     INVESTMENT
                PORTFOLIO    PERIOD  AVERAGE   INCOME TO
                TURNOVER      (IN      NET      AVERAGE
                 RATE(D)     000S)    ASSETS   NET ASSETS
                ----------- -------- --------- ----------
                     SHORT DURATION TAX-FREE FUND
- ---------------------------------------------------------
<S>             <C>         <C>      <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,                                                                                                
1997-           
Institutional   
Shares.......... 194.75%    $ 28,821   1.23%      3.40%
1997-           
Administration  
Shares.......... 194.75           77   1.48       3.13
1997-Service    
Shares.......... 194.75        2,051   1.73       2.88
1997-Class A    
Shares(o)....... 194.75(f)     4,023   1.73(b)    2.78(b)
1997-Class B    
Shares(o)....... 194.75(f)       106   2.23(b)    2.38(b)
1997-Class C    
Shares(p)....... 194.75(f)         2   2.23(b)    1.82(b)
1996-           
Institutional   
Shares.......... 231.65       34,814   1.01       3.65
1996-           
Administration  
Shares.......... 231.65           48   1.26       3.40
1996-Service    
Shares.......... 231.65          695   1.51       3.18
1995-           
Institutional   
Shares.......... 259.52       58,389   0.77       3.99
1995-           
Administration  
Shares.......... 259.52           46   1.02       3.82
1995-Service    
Shares.......... 259.52          454   1.27       3.55
1994-           
Institutional   
Shares.......... 354.00       83,704   0.61       3.58
1994-           
Administration  
Shares.......... 354.00        3,866   0.86       3.35
1994-Service    
Shares(j)....... 354.00          440   1.11(b)    4.14(b)
1993-           
Institutional   
Shares.......... 404.60      115,803   1.06       3.05
1993-           
Administration  
Shares(j)....... 404.60          911   1.07(b)    2.95(b)
FOR THE PERIOD OCTOBER 1, 1992(G) THROUGH OCTOBER 31,                                                                          
1992-           
Institutional   
Shares..........  31.19(f)    14,601   2.68(b)    1.95(b)
- -------------------------------------------------------
</TABLE>
 
                                       11
<PAGE>
 
<TABLE>
<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)                       DISTRIBUTIONS TO SHAREHOLDERS
                           ----------------------------------------------- -------------------------------------------------------
                                      NET REALIZED     NET
                                          AND        REALIZED                                                  IN EXCESS
                                       UNREALIZED      AND                              FROM NET                 OF NET
                                      GAIN (LOSS)   UNREALIZED    TOTAL                 REALIZED                REALIZED
                                           ON      GAIN (LOSS)    INCOME                GAIN ON                 GAIN ON
                 NET ASSET            INVESTMENT,   ON FOREIGN    (LOSS)              INVESTMENT,  IN EXCESS  INVESTMENT,   FROM
                 VALUE AT     NET      OPTION AND    CURRENCY      FROM     FROM NET   OPTION AND    OF NET    OPTION AND   PAID
                 BEGINNING INVESTMENT   FUTURES      RELATED    INVESTMENT INVESTMENT   FUTURES    INVESTMENT   FUTURES      IN
                 OF PERIOD   INCOME   TRANSACTIONS TRANSACTIONS OPERATIONS   INCOME   TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL
                 --------- ---------- ------------ ------------ ---------- ---------- ------------ ---------- ------------ -------
<S>              <C>       <C>        <C>          <C>          <C>        <C>        <C>          <C>        <C>          <C>
                                                            GOVERNMENT INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
FOR THE YEARS ENDED OCTOBER 31,
- ---------------------
1997-Class A
Shares            $14.36     $0.91       $0.29          --        $1.20      $(0.90)     $(0.07)        --          --        --
1997-Class B
Shares             14.37      0.80        0.30          --         1.10       (0.79)      (0.07)        --          --        --
1997-Class C
Shares(p)          14.38      0.17        0.22          --         0.39       (0.17)         --         --          --        --
1997-
Institutional
Shares(p)          14.37      0.20        0.22          --         0.42       (0.20)         --         --          --        --
1997-Service
Shares(p)          14.37      0.20        0.21          --         0.41       (0.19)         --         --          --        --
1996-Class A
shares             14.47      0.92       (0.11)         --         0.81       (0.92)         --         --          --        --
1996-Class B
shares(q)          14.11      0.41        0.26          --         0.67       (0.41)         --         --          --        --
1995-Class A
shares             13.47      0.94        1.00          --         1.94       (0.94)         --         --          --        --
1994-Class A
shares             14.90      0.85       (1.28)         --        (0.43)      (0.85)      (0.12)     (0.02)      (0.01)       --
FOR THE PERIOD FEBRUARY 10, 1993(G) THROUGH OCTOBER 31,
- ---------------------------------------
1993-Class A
shares             14.32      0.56        0.58          --         1.14       (0.56)         --         --          --        --

<CAPTION>  
                                                       MUNICIPAL INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>          <C>          <C>        <C>        <C>          <C>        <C>          <C>
FOR THE YEARS ENDED OCTOBER 31,
- ---------------------
1997-Class A
Shares            $14.37     $0.67       $0.62         --         $1.29      $(0.67)        --         --          --        --
1997-Class B
Shares             14.37      0.56        0.63         --          1.19       (0.56)        --         --          --        --
1997-Class C
Shares(p)          14.85      0.12        0.14         --          0.26       (0.12)        --         --          --        --
1997-
Institutional
Shares(p)          14.84      0.15        0.16         --          0.31       (0.15)        --         --          --        --
1997-Service
Shares(p)          14.84      0.14        0.15         --          0.29       (0.14)        --         --          --        --
1996-Class A
shares             14.17      0.65        0.20         --          0.85       (0.65)        --         --          --        --
1996-Class B
shares(q)          14.03      0.27        0.34         --          0.61       (0.27)        --         --          --        --
1995-Class A
shares             13.08      0.67        1.09         --          1.76       (0.67)        --         --          --        --
1994-Class A
shares             14.64      0.73       (1.51)        --         (0.78)      (0.73)      (0.05)       --          --        --
FOR THE PERIOD JULY 20, 1993(G) THROUGH OCTOBER 31,
- ------------------------------------
1993-Class A
shares             14.32      0.22        0.32         --          0.54       (0.22)        --         --          --        --
- ----------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                                                     RATIOS ASSUMING NO
                                                                                                     VOLUNTARY WAIVER OF
                                                                                                       FEES OR EXPENSE
                                                                                                         LIMITATIONS
                                                                                                     --------------------
                                                            RATIO OF   RATIO OF                NET              RATIO OF
                                  NET      NET                NET        NET                 ASSETS  RATIO OF     NET
                                INCREASE  ASSET             EXPENSES  INVESTMENT             AT END  EXPENSES  INVESTMENT
                     TOTAL     (DECREASE) VALUE                TO       INCOME                 OF       TO       INCOME
                 DISTRIBUTIONS   IN NET   AT END            AVERAGE   (LOSS) TO  PORTFOLIO   PERIOD  AVERAGE   (LOSS) TO
                      TO         ASSET      OF     TOTAL      NET      AVERAGE   TURNOVER      (IN     NET      AVERAGE
                 SHAREHOLDERS    VALUE    PERIOD RETURN(K)   ASSETS   NET ASSETS  RATE(D)     000S)   ASSETS   NET ASSETS
                 ------------- ---------- ------ ---------- --------- ---------- ----------- ------- --------- ----------
<S>              <C>           <C>        <C>    <C>        <C>       <C>        <C>         <C>     <C>       <C>
                                                         GOVERNMENT INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
FOR THE YEARS ENDED OCTOBER 31,
- ---------------------
1997-Class A
Shares              $(0.97)      $0.23    $14.59    8.72%     0.50%      6.38%    395.75%    $68,859   1.82%      5.06%
1997-Class B
Shares               (0.86)       0.24     14.61    7.96      1.25       5.59     395.75       8,041   2.32       4.52
1997-Class C
Shares(p)            (0.17)       0.22     14.60    2.72(f)   1.25(b)    5.45(b)  395.75(f)    1,196   2.32(b)    4.38(b)
1997-
Institutional
Shares(p)            (0.20)       0.22     14.59    2.94(f)   0.25(b)    7.03(b)  395.75(f)    1,894   1.32(b)    5.96(b)
1997-Service
Shares(p)            (0.19)       0.22     14.59    2.85(f)   0.75(b)    6.49(b)  395.75(f)        2   1.82(b)    5.42(b)
1996-Class A
shares               (0.92)      (0.11)    14.36    5.80      0.75       6.42     485.09      30,603   1.89       5.03
1996-Class B
shares(q)            (0.41)       0.26     14.37    4.85(f)   1.25(b)    5.65(b)  485.09         234   2.39(b)    4.51(b)
1995-Class A
shares               (0.94)       1.00     14.47   14.90      0.47       6.67     449.53      29,503   2.34       4.80
1994-Class A
shares               (1.00)      (1.43)    13.47   (2.98)     0.11       6.06     654.90      14,452   2.86       3.31
FOR THE PERIOD FEBRUARY 10, 1993(G) THROUGH OCTOBER 31,
- ---------------------------------------
1993-Class A
shares               (0.56)       0.58     14.90    8.03(f)   0.00(b)    4.87(e)  725.41(f)   12,860   4.00(b)

<CAPTION> 
                                                       MUNICIPAL INCOME FUND
- -----------------------------------------------------------------------------------------------------------------------
<S>              <C>           <C>        <C>    <C>        <C>       <C>        <C>         <C>     <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,
- ---------------------
1997-Class A
Shares              $(0.67)      $0.62    $14.99    9.23%     0.85%      4.60%    153.12%    $64,553   1.62%      3.83%
1997-Class B
Shares               (0.56)       0.63     15.00    8.48      1.60       3.74     153.12       1,750   2.12       3.22
1997-Class C
Shares(p)            (0.12)       0.14     14.99    1.75(f)   1.60(b)    3.24(b)  153.12(f)      130   2.12(b)    2.72(b)
1997-
Institutional
Shares(p)            (0.15)       0.16     15.00    2.10(f)   0.60(b)    4.41(b)  153.12(f)      351   1.12(b)    3.89(b)
1997-Service
Shares(p)            (0.14)       0.15     14.99    1.93(f)   1.10(b)    4.24(b)  153.12(f)        2   1.62(b)    3.72(b)
1996-Class A
shares               (0.65)       0.20     14.37    6.13      0.85       4.58     344.13      52,267   1.55       3.88
1996-Class B
shares(q)            (0.27)       0.34     14.37    4.40(f)   1.60(b)    3.55(b)  344.13(f)      255   2.05(b)    3.10(b)
1995-Class A
shares               (0.67)       1.09     14.17   13.79      0.76       4.93     335.55      53,797   1.49       4.20
1994-Class A
shares               (0.78)      (1.56)    13.08   (5.51)     0.45       5.28     357.54      47,373   1.55       4.18
FOR THE PERIOD JULY 20, 1993(G) THROUGH OCTOBER 31,
- ------------------------------------
1993-Class A
shares               (0.22)       0.32     14.64    3.73(f)   0.00(b)    5.15(b)   99.99(f)   30,166   2.42(b)    2.73(b)
- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
 
                                       12
<PAGE>
 
<TABLE>
<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)                       DISTRIBUTIONS TO SHAREHOLDERS
                           ----------------------------------------------- -------------------------------------------------------
                                      NET REALIZED     NET
                                          AND        REALIZED                                                  IN EXCESS
                                       UNREALIZED      AND                              FROM NET                 OF NET
                                      GAIN (LOSS)   UNREALIZED    TOTAL                 REALIZED                REALIZED
                                           ON      GAIN (LOSS)    INCOME                GAIN ON                 GAIN ON
                 NET ASSET            INVESTMENT,   ON FOREIGN    (LOSS)              INVESTMENT,  IN EXCESS  INVESTMENT,   FROM
                 VALUE AT     NET      OPTION AND    CURRENCY      FROM     FROM NET   OPTION AND    OF NET    OPTION AND   PAID
                 BEGINNING INVESTMENT   FUTURES      RELATED    INVESTMENT INVESTMENT   FUTURES    INVESTMENT   FUTURES      IN
                 OF PERIOD   INCOME   TRANSACTIONS TRANSACTIONS OPERATIONS   INCOME   TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL
                 --------- ---------- ------------ ------------ ---------- ---------- ------------ ---------- ------------ -------
                                                      CORE FIXED INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>          <C>          <C>        <C>        <C>          <C>        <C>          <C>
FOR THE YEARS ENDED OCTOBER 31,
- ---------------------
1997-
Institutional
Shares            $ 9.85    $0.6431     $0.2282      $(0.0005)   $ 0.8708   $(0.6408)       --        --          --          --
1997-
Administration
Shares              9.84     0.6182      0.2380       (0.0005)     0.8557    (0.6157)       --        --          --          --
1997-Service
Shares              9.86     0.5937      0.2287       (0.0005)     0.8219    (0.5919)       --        --          --          --
1997-Class A
Shares(o)           9.70     0.3059      0.3596       (0.0008)     0.6647    (0.3048)       --        --          --          --
1997-Class B
Shares(o)           9.72     0.2686      0.3695       (0.0008)     0.6373    (0.2673)       --        --          --          --
1997-Class C
Shares(p)           9.93     0.1118      0.1591       (0.0003)     0.2706    (0.1107)       --        --          --          --
1996-
Institutional
Shares             10.00     0.6448     (0.0704)          --       0.5744    (0.6438)   (0.0806)      --          --          --
1996-
Administration
Shares(/1/)         9.91     0.4083     (0.0703)          --       0.3380    (0.4080)       --        --          --          --
1996-Service
Shares(l)           9.77     0.3756      0.0898           --       0.4654    (0.3754)       --        --          --          --
1995-
Institutional
Shares              9.24     0.6423      0.7610           --       1.4033    (0.6433)       --        --          --          --
FOR THE PERIOD JANUARY 5, 1994(G) THROUGH OCTOBER 31,
- ----------------------------------
1994-
Institutional
Shares             10.00     0.4648     (0.7617)          --      (0.2969)   (0.4648)       --        --          --          --

<CAPTION>  
                                                        GLOBAL INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>          <C>          <C>        <C>        <C>          <C>        <C>          <C>

FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Class A
shares            $14.53    $  0.59     $  0.50      $   0.27    $   1.36   $  (0.79)        --        --          --          --
1997-Class B
shares             14.53       0.72        0.36          0.20        1.28      (0.73)        --        --          --          --
1997-Class C
shares(p)          14.80       0.16        0.19          0.10        0.45      (0.19)        --        --          --          --
1997-
Institutional
Shares             14.52       0.88        0.37          0.19        1.44      (0.87)        --        --          --          --
1997-Service
Shares(s)          14.69       0.53        0.25          0.14        0.92      (0.52)        --        --          --          --
1996-Class A
shares             14.45       0.71        0.62          0.18        1.51      (1.43)        --        --          --          --
1996-Class B
shares(q)          14.03       0.34        0.41          0.11        0.86      (0.36)        --        --          --          --
1996-
Institutional
shares             14.45       1.15        0.32          0.10        1.57      (1.50)        --        --          --          --
1995-Class A
shares             13.43       0.89        0.92          0.15        1.96      (0.94)        --        --          --          --
1995-
Institutional
shares(r)          14.09       0.22        0.34          0.06        0.62      (0.26)        --        --          --          --
1994-Class A
shares             15.07       0.84       (1.37)        (0.12)      (0.65)     (0.22)     (0.16)       --          --       (0.61)
1993-Class A
shares             14.69       0.85        1.07         (0.42)       1.50      (0.85)     (0.27)       --          --          --
1992-Class A
shares             14.60       1.14        0.45         (0.36)       1.23      (1.14)        --        --          --          --

FOR THE PERIOD AUGUST 2, 1991(G) THROUGH OCTOBER 31,
- ----------------------------------------------------
1991-Class A
shares             14.55       0.25        0.23         (0.19)       0.29      (0.24)        --        --          --          --
- ----------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                                                          RATIOS ASSUMING NO
                                                                                                          VOLUNTARY WAIVER OF
                                                                                                            FEES OR EXPENSE
                                                                                                              LIMITATIONS
                                                                                                          --------------------
                                                            RATIO OF     RATIO OF                  NET               RATIO OF
                                  NET      NET                NET          NET                    ASSETS  RATIO OF     NET
                                INCREASE  ASSET             EXPENSES    INVESTMENT                AT END  EXPENSES  INVESTMENT
                     TOTAL     (DECREASE) VALUE                TO         INCOME                    OF       TO       INCOME
                 DISTRIBUTIONS   IN NET   AT END            AVERAGE     (LOSS) TO    PORTFOLIO    PERIOD  AVERAGE   (LOSS) TO
                      TO         ASSET      OF     TOTAL      NET        AVERAGE     TURNOVER      (IN      NET      AVERAGE
                 SHAREHOLDERS    VALUE    PERIOD RETURN(K)   ASSETS     NET ASSETS    RATE(D)     000S)    ASSETS   NET ASSETS
                 ------------- ---------- ------ ---------- ----------- ------------ ----------- -------- --------- ----------
                                                      CORE FIXED INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>           <C>        <C>    <C>        <C>         <C>          <C>         <C>      <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,
- ---------------------
1997-
Institutional
Shares             $(0.6408)    $ 0.2300  $10.08    9.19%      0.45%        6.53%     361.27%     $79,230   0.83%      6.15%
1997-
Administration
Shares              (0.6157)      0.2300   10.07    8.92       0.70         6.27      361.27        6,176   1.08       5.89
1997-Service
Shares              (0.5919)      0.2300   10.09    8.65       0.95         6.00      361.27        1,868   1.33       5.62
1997-Class A
Shares(o)           (0.3048)      0.3599   10.06    6.94(f)    0.70(b)      6.13(b)   361.27(f)     9,336   1.33(b)    5.50(b)
1997-Class B
Shares(o)           (0.2673)      0.3700   10.09    6.63(f)    1.45(b)      5.28(b)   361.27(f)       621   1.83(b)    4.90(b)
1997-Class C
Shares(p)           (0.1107)      0.1599   10.09    2.74(f)    1.45(b)      4.84(b)   361.27(f)       272   1.83(b)    4.46(b)
1996-
Institutional
Shares              (0.7244)     (0.1500)   9.85    5.98       0.45         6.51      414.20       72,061   0.83       6.13
1996-
Administration
Shares(/1/)         (0.4080)     (0.0700)   9.84    3.56(f)    0.70(b)      6.41(b)   414.20          702   1.08(b)    6.03(b)
1996-Service
Shares(l)           (0.3754)      0.0900    9.86    4.90(f)    0.95(b)      6.37(b)   414.20          381   1.33(b)    5.99(b)
1995-
Institutional
Shares              (0.6433)      0.7600   10.00   15.72       0.45         6.56      382.26       55,502   0.96       6.05
FOR THE PERIOD JANUARY 5, 1994(G) THROUGH OCTOBER 31,
- ----------------------------------
1994-
Institutional
Shares              (0.4648)     (0.7617)   9.24   (3.00)   0.45(b)      6.48(b)      285.25       24,508   1.46(b)    5.47(b)

<CAPTION>  
                                                        GLOBAL INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>           <C>        <C>    <C>        <C>         <C>          <C>         <C>      <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Class A
shares             $  (0.79)    $   0.57  $15.10    9.66%      1.17%        5.19%     383.72%    $167,096   1.60%      4.76%
1997-Class B
shares                (0.73)        0.55   15.08    9.04       1.71         4.76      383.72        3,465   2.10       4.37
1997-Class C
shares(p)             (0.19)        0.26   15.06    3.03(f)    1.71(b)      4.98(b)   383.72(f)       496   2.10(b)    4.59(b)
1997-
Institutional
Shares                (0.87)        0.57   15.09   10.26       0.65         5.72      383.72       60,929   1.04       5.33
1997-Service
Shares(s)             (0.52)        0.40   15.09    6.42(f)    1.15(b)      5.33(b)   383.72(f)       151   1.54(b)    4.94(b)
1996-Class A
shares                (1.43)        0.08   14.53   11.05       1.16         5.81      232.15      198,665   1.64       5.33
1996-Class B
shares(q)             (0.36)        0.50   14.53    6.24(f)    1.70(b)      5.16(b)   232.15(f)       256   2.14(b)    4.72(b)
1996-
Institutional
shares                (1.50)        0.07   14.52   11.55       0.65         6.35      232.15       54,254   1.11       5.89
1995-Class A
shares                (0.94)        1.02   14.45   15.08       1.29         6.23      265.86      245,835   1.58       5.94
1995-
Institutional
shares(r)             (0.26)        0.36   14.45    4.42(f)    0.65(b)      6.01(b)   265.86(f)    31,619   1.08(b)    5.58(b)
1994-Class A
shares                (0.99)       (1.64)  13.43   (4.49)      1.28         5.73      343.74      396,584   1.53       5.48
1993-Class A
shares                (1.12)        0.38   15.07   10.75       1.30         5.78      313.88      675,662   1.55       5.53
1992-Class A
shares                (1.14)        0.09   14.69    8.77       1.37         7.85      270.75      588,893   1.62       7.60
FOR THE PERIOD AUGUST 2, 1991(G) THROUGH OCTOBER 31,
- ----------------------------------------------------
1991-Class A
shares                (0.24)        0.05   14.60    2.00(f)    0.38(f)      1.72(f)    34.22(f)   388,744   0.44(f)    1.66(f)
</TABLE>
 
                                       13
<PAGE>
 
<TABLE>
<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)                       DISTRIBUTIONS TO SHAREHOLDERS
                           ----------------------------------------------- -------------------------------------------------------
                                      NET REALIZED     NET
                                          AND        REALIZED                                                  IN EXCESS
                                       UNREALIZED      AND                              FROM NET                 OF NET
                                      GAIN (LOSS)   UNREALIZED    TOTAL                 REALIZED                REALIZED
                                           ON      GAIN (LOSS)    INCOME                GAIN ON                 GAIN ON
                 NET ASSET            INVESTMENT,   ON FOREIGN    (LOSS)              INVESTMENT,  IN EXCESS  INVESTMENT,   FROM
                 VALUE AT     NET      OPTION AND    CURRENCY      FROM     FROM NET   OPTION AND    OF NET    OPTION AND   PAID
                 BEGINNING INVESTMENT   FUTURES      RELATED    INVESTMENT INVESTMENT   FUTURES    INVESTMENT   FUTURES      IN
                 OF PERIOD   INCOME   TRANSACTIONS TRANSACTIONS OPERATIONS   INCOME   TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL
                 --------- ---------- ------------ ------------ ---------- ---------- ------------ ---------- ------------ -------
<S>              <C>       <C>        <C>          <C>          <C>        <C>        <C>          <C>        <C>          <C>
                                                                                                    HIGH YIELD FUND
- ----------------------------------------------------------------------------------------------------------------------------------
FOR THE PERIOD AUGUST 1, 1997(G) THROUGH OCTOBER 31,
- ----------------------------------------------------
1997-Class A
Shares            $10.00     $0.17       $(0.03)       0.01       $0.15      $(0.17)      --         $(0.01)      --         --
1997-Class B
Shares             10.00      0.15        (0.03)       0.01        0.13       (0.15)      --          (0.01)      --         --
1997-Class C
Shares(p)           9.97      0.14          --         0.01        0.12       (0.14)      --          (0.01)      --         --
1997-
Institutional
Shares             10.00      0.18        (0.03)       0.01        0.16       (0.18)      --          (0.01)      --         --
1997-Service
Shares             10.00      0.17        (0.03)       0.01        0.15       (0.17)      --          (0.01)      --         --
- ----------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                                                         RATIOS ASSUMING NO
                                                                                                         VOLUNTARY WAIVER OF
                                                                                                           FEES OR EXPENSE
                                                                                                             LIMITATIONS
                                                                                                         ----------------------
                                                             RATIO OF    RATIO OF                 NET                RATIO OF
                                  NET      NET                 NET         NET                   ASSETS  RATIO OF      NET
                                INCREASE  ASSET              EXPENSES   INVESTMENT               AT END  EXPENSES   INVESTMENT
                     TOTAL     (DECREASE) VALUE                 TO        INCOME                   OF       TO        INCOME
                 DISTRIBUTIONS   IN NET   AT END             AVERAGE    (LOSS) TO   PORTFOLIO    PERIOD  AVERAGE    (LOSS) TO
                      TO         ASSET      OF     TOTAL       NET       AVERAGE    TURNOVER      (IN      NET       AVERAGE
                 SHAREHOLDERS    VALUE    PERIOD RETURN(K)    ASSETS    NET ASSETS   RATE(D)     000S)    ASSETS    NET ASSETS
                 ------------- ---------- ------ ----------- ---------- ----------- ----------- -------- ---------- -----------
<S>              <C>           <C>        <C>    <C>         <C>        <C>         <C>         <C>      <C>        <C>
- ----------------------------------------------------------------------------------------------------------------------------------
FOR THE PERIOD AUGUST 1, 1997(G) THROUGH OCTOBER 31,
- ----------------------------------------------------
1997-Class A
Shares              $(0.18)      $(0.03)  $9.97    1.50%(f)    0.95%(b)    7.06%(b)   44.80%(f) $325,911   1.57%(b)    6.44%(b)
1997-Class B
Shares               (0.16)       (0.03)   9.97    1.31(f)     1.70(b)     6.28(e)    44.80(f)    10.308   2.07(b)     5.91(b)
1997-Class C
Shares(p)            (0.15)       (0.03)   9.97    1.46(f)     1.70(b)     6.17(b)    44.80(f)     1,791   2.07(b)     5.80(b)
1997-
Institutional
Shares               (0.19)       (0.03)   9.97    1.58(f)     0.70(b)     7.16(b)    44.80(f)         2   1.07(b)     6.79(b)
1997-Service
Shares               (0.18)       (0.03)   9.97    1.46(f)     1.20(b)     6.69(b)    44.80(f)         2   1.57(b)     6.32(b)
- ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>
(a)Calculated based on the average shares outstanding methodology.
(b)Annualized.
(c)Class A share activity commenced on May 15, 1995.
(d)Includes the effect of mortgage dollar roll transactions.
(e)Administration share activity commenced on April 15, 1993.
(f)Not annualized.
(g)Commencement of operations.
(h)Short Duration Government Fund Administration shares were redeemed in full
on February 23, 1995 and re-commenced on February 28, 1996 at $9.86.
(i)Service share activity commenced on April 10, 1996.
(j)Administration and service share activity commenced on May 20, 1993 and
   September 20, 1994, respectively.
(k)Assumes investment at the net asset value at the beginning of the period,
   reinvestment of all dividends and distributions, a complete redemption of
   the investment at the net asset value at the end of the period and no
   sales charges. Total return would be reduced if a sales charge for Class A
   shares or a contingent deferred sales charge for Class B and Class C
   shares were taken into account.
(l)Administration and Service share activity commenced on February 28, 1996
   and March 13, 1996, respectively.
(m)Service share activity commenced on March 27, 1997.
(n)Includes the balancing effect of calculating per share amounts.
(o)Class A and Class B share activity commenced on May 1, 1997.
(p)Commenced operations on August 15, 1997.
(q)Class B shares commenced operations on May 1, 1996.
(r)Institutional shares commenced operations on August 1, 1995.
(s)Service Class shares commenced operations on March 12, 1997.
- -------------------------------------------------------------------------------
 
                                       14
<PAGE>
 
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
 
  The investment objectives and principal investment policies of each Fund are
described below. Other investment practices and management techniques, which
involve certain risks, are described under "Description of Securities," "Risk
Factors" and "Investment Techniques." There can be no assurance that a Fund's
investment objectives will be achieved.
 
  A Fund's duration approximates its price sensitivity to changes in interest
rates. Maturity measures the time until final payment is due; it takes no
account of the pattern of a security's cash flows over time. In computing
portfolio duration, a Fund will estimate the duration of obligations that are
subject to prepayment or redemption by the issuer taking into account the
influence of interest rates on prepayments and coupon flows. This method of
computing duration is known as "option-adjusted" duration. A Fund will not be
limited as to its maximum weighted average portfolio maturity or the maximum
stated maturity with respect to individual securities unless otherwise noted.
 
  A Fund will deem a security to have met its minimum credit rating
requirement if the security receives the minimum required long-term rating (or
the equivalent short-term credit rating) at the time of purchase from at least
one nationally recognized statistical rating organization ("NRSRO") including,
but not limited to, Standard & Poor's Ratings Group ("S&P") and Moody's
Investors Service, Inc. ("Moody's") even though it has been rated below the
minimum rating by one or more other NRSROs or, if unrated, is determined by
the Investment Adviser to be of comparable quality. If a security satisfies a
Fund's minimum rating criteria at the time of purchase and is subsequently
downgraded below such rating, the Fund will not be required to dispose of such
security. If a downgrade occurs, the Investment Adviser will consider what
action, including the sale of such security, is in the best interest of a Fund
and its shareholders.
 
  The Investment Adviser will usually have access to the research of, and
certain proprietary technical models developed by, Goldman Sachs and will
apply quantitative and qualitative analysis in determining the appropriate
allocations among the categories of issuers and types of securities.
 
 ADJUSTABLE RATE GOVERNMENT FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income, consistent with low volatility of principal.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be in a range approximately equal to that of a six-month to one-
year U.S. Treasury security. In addition, under normal interest rate
conditions, the Fund's maximum duration will not exceed two years. The
approximate interest rate sensitivity of the Fund is expected to be comparable
to a nine-month note.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in U.S. Government Securities that are adjustable rate
mortgage pass-through securities and other mortgage securities with periodic
interest rate resets. The remainder of the Fund's assets (up to 35%) may be
invested in other U.S. Government Securities, including fixed rate mortgage
pass-through securities, other securities representing an interest in or
collateralized by adjustable rate and fixed rate mortgage loans ("Mortgage-
Backed Securities") and repurchase agreements collateralized by U.S.
Government Securities. Substantially all of the Fund's assets
 
                                      15
<PAGE>
 
will be invested in U.S. Government Securities. 100% of the Fund's portfolio
will be invested in U.S. dollar-denominated securities.
 
  CREDIT QUALITY. The Fund invests in U.S. Government Securities and
repurchase agreements collateralized by such securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), mortgage and
interest rate swaps and interest rate floors, caps and collars. The Fund may
also employ other investment techniques to seek to enhance returns, such as
lending portfolio securities and entering into mortgage dollar rolls,
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 SHORT DURATION GOVERNMENT FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide a high level of
current income. Secondarily, the Fund may, in seeking current income, also
consider the potential for capital appreciation.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the two-year U.S.
Treasury security, plus or minus .5 years. In addition, under normal interest
rate conditions, the Fund's maximum duration will not exceed three years. The
approximate interest rate sensitivity of the Fund is expected to be comparable
to a two-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal market conditions, at
least 65% of its total assets in U.S. Government Securities and in repurchase
agreements collateralized by such securities. Substantially all of the Fund's
assets will be invested in U.S. Government Securities. 100% of the Fund's
portfolio will be invested in U.S. dollar-denominated securities.
 
  CREDIT QUALITY. The Fund invests in U.S. Government Securities and
repurchase agreements collateralized by such securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), mortgage and
interest rate swaps and interest rate floors, caps and collars. The Fund may
also employ other investment techniques to seek to enhance returns, such as
lending portfolio securities and entering into mortgage dollar rolls,
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 SHORT DURATION TAX-FREE FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income, consistent with relatively low volatility of
principal, that is exempt from regular federal income tax.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
three-year Municipal Bond Index, plus or minus .5 years. In addition, under
normal interest rate conditions, the Fund's maximum duration will not exceed
four years. The approximate interest rate sensitivity of the Fund is expected
to be comparable to a three-year bond.
 
                                      16
<PAGE>
 
  INVESTMENT SECTOR. The Fund invests, under normal conditions, at least 80%
of its net assets in fixed-income securities issued by or on behalf of states,
territories and possessions of the United States (including the District of
Columbia) and the political subdivisions, agencies and instrumentalities
thereof ("Municipal Securities"), the interest on which is exempt from regular
federal income tax (i.e., excluded from gross income for federal income tax
purposes), and is not a tax preference item under the federal alternative
minimum tax. Under normal circumstances, the Fund's investments in private
activity bonds and taxable investments will not exceed, in the aggregate, 20%
of the Fund's net assets. The interest from certain private activity bonds
(including the Fund's distributions of such interest) may be a preference item
for purposes of the federal alternative minimum tax. 100% of the Fund's
portfolio will be invested in U.S. dollar-denominated securities.
 
  CREDIT QUALITY. The Municipal Securities in which the Fund invests will be
rated, at the time of investment, at least BBB or Baa by an NRSRO or, if
unrated, will be determined by the Investment Adviser to be of comparable
quality. Municipal Securities rated BBB or Baa are considered medium-grade
obligations with speculative characteristics, and adverse economic conditions
or changing circumstances may weaken their issuers' capability to pay interest
and repay principal. The credit rating assigned to Municipal Securities may
reflect the existence of guarantees, letters of credit or other credit
enhancement features available to the issuers or holders of such Municipal
Securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), interest rate
swaps, floors, caps and collars. The Fund may also employ other investment
techniques to seek to enhance returns, such as lending portfolio securities
and entering into repurchase agreements and other investment practices
described under "Investment Techniques."
 
  While the Fund, under normal market conditions, invests substantially all of
its assets in Municipal Securities, the recognition of certain accrued market
discount income (if the Fund acquires Municipal Securities or other
obligations at a market discount), income from investments other than
Municipal Securities and any capital gains generated from the disposition of
investments, will result in taxable income. In addition to federal income tax,
shareholders may be subject to state, local or foreign taxes on distributions
of such income received from the Fund. See "Description of Securities."
 
 GOVERNMENT INCOME FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income, consistent with safety of principal.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
Mutual Fund Government/Mortgage Index, plus or minus one year. In addition,
under normal interest rate conditions, the Fund's maximum duration will not
exceed six years. The approximate interest rate sensitivity of the Fund is
expected to be comparable to a five-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in U.S. Government Securities and in repurchase
agreements collateralized by such securities. The remainder of the Fund's
assets may be invested in non-government securities such as privately issued
Mortgage-Backed Securities, Asset-Backed Securities and corporate securities.
100% of the Fund's portfolio will be invested in U.S. dollar-denominated
securities.
 
                                      17
<PAGE>
 
  CREDIT QUALITY. The Fund's non-U.S. Government Securities will be rated, at
the time of investment, AAA or Aaa by an NRSRO or, if unrated, will be
determined by the Investment Adviser to be of comparable quality.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), mortgage, credit
and interest rate swaps and interest rate floors, caps and collars. The Fund
may also employ other investment techniques to seek to enhance returns, such
as lending portfolio securities and entering into mortgage dollar rolls,
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 MUNICIPAL INCOME FUND
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income that is exempt from regular federal income tax,
consistent with preservation of capital.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
fifteen-year Municipal Bond Index, plus or minus one year. In addition, under
normal interest rate conditions, the Fund's maximum duration will not exceed
twelve years. The approximate interest rate sensitivity of the Fund is
expected to be comparable to a fifteen-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
80% of its net assets in Municipal Securities, the interest on which is exempt
from regular federal income tax (i.e., excluded from gross income for federal
income tax purposes). The Fund may invest up to 100% of its net assets in
private activity bonds, the interest from certain of which (including the
Fund's distributions of such interest) may be a preference item for purposes
of the federal alternative minimum tax. 100% of the Fund's portfolio will be
invested in U.S. dollar-denominated securities.
 
  CREDIT QUALITY. Under normal market conditions, the weighted average credit
quality of the Fund's portfolio will be equivalent to that of securities rated
AA or Aa by an NRSRO. All securities purchased by the Fund will be rated, at
the time of investment, at least BBB or Baa by an NRSRO or, if unrated, will
be determined by the Investment Adviser to be of comparable quality. Fixed-
income securities rated BBB or Baa are considered medium-grade obligations
with speculative characteristics, and adverse economic conditions or changing
circumstances may weaken their issuers' capability to pay interest and repay
principal. The credit rating assigned to Municipal Securities may reflect the
existence of guarantees, letters of credit or other credit enhancement
features available to the issuers or holders of such Municipal Securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), interest rate
swaps, interest rate floors, caps and collars. The Fund may also employ other
investment techniques to seek to enhance returns, such as lending portfolio
securities and entering into repurchase agreements and other investment
practices described under "Investment Techniques."
 
  While the Fund, under normal market conditions, invests substantially all of
its assets in Municipal Securities, the recognition of certain accrued market
discount income (if the Fund acquires Municipal Securities or other
obligations at a market discount), income from investments other than
Municipal Securities and any capital gains generated from the disposition of
investments, will result in taxable income. In addition to federal income tax,
shareholders may be subject to state, local or foreign taxes on distributions
of such income received from the Fund. See "Description of Securities."
 
                                      18
<PAGE>
 
 CORE FIXED INCOME FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
total return consisting of capital appreciation and income that exceeds the
total return of the Lehman Brothers Aggregate Bond Index (the "Index").
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
Aggregate Bond Index, plus or minus one year. In addition, under normal
interest rate conditions, the Fund's maximum duration will not exceed six
years. The approximate interest rate sensitivity of the Fund is expected to be
comparable to a five-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in fixed-income securities, including U.S. Government
Securities, corporate debt securities, Mortgage-Backed Securities, and Asset-
Backed Securities. The Fund may invest up to 25% of its total assets in
obligations of domestic and foreign issuers which are denominated in
currencies other than the U.S. dollar, 10% of which may be invested in issuers
in countries with emerging markets and economies. A number of investment
strategies will be used to achieve the Fund's investment objective, including
market sector selection, determination of yield curve exposure, and issuer
selection. In addition, the Investment Adviser will attempt to take advantage
of pricing inefficiencies in the fixed-income markets.
 
  The Index currently includes U.S. Government Securities and fixed-rate,
publicly issued, U.S. dollar-denominated fixed-income securities rated at
least BBB or Baa by an NRSRO. The securities currently included in the Index
have at least one year remaining to maturity; have an outstanding principal
amount of at least $100 million; and are issued by the following types of
issuers, with each category receiving a different weighting in the Index: U.S.
Treasury; agencies, authorities or instrumentalities of the U.S. government;
issuers of Mortgage-Backed Securities; utilities; industrial issuers;
financial institutions; foreign issuers; and issuers of Asset-Backed
Securities. The Index is a trademark of Lehman Brothers. Inclusion of a
security in the Index does not imply an opinion by Lehman Brothers as to its
attractiveness or appropriateness for investment. Although Lehman Brothers
obtains factual information used in connection with the Index from sources
which it considers reliable, Lehman Brothers claims no responsibility for the
accuracy, completeness or timeliness of such information and has no liability
to any person for any loss arising from results obtained from the use of the
Index data.
 
  CREDIT QUALITY. All U.S. dollar-denominated fixed-income securities
purchased by the Fund will be rated, at the time of investment, at least BBB
or Baa by an NRSRO. The non-U.S. dollar-denominated fixed-income securities in
which the Fund may invest will be rated, at the time of investment, at least
AA or Aa by an NRSRO or, if unrated, will be determined by the Investment
Adviser to be of comparable quality. Fixed-income securities rated BBB or Baa
are considered medium-grade obligations with speculative characteristics, and
adverse economic conditions or changing circumstances may weaken their
issuers' capability to pay interest and repay principal.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure, to seek to hedge its exposure to foreign
currencies and to seek to enhance returns. These techniques include, but are
not limited to, the use of financial futures contracts, option contracts
(including options on futures), forward foreign currency exchange contracts,
currency options and futures, currency, mortgage, credit and interest rate
swaps and interest rate floors, caps and collars. Currency management
techniques involve risks different from those associated with investing solely
in U.S. dollar-denominated fixed-income securities of U.S. issuers. It is
expected that the Fund will use certain currency techniques to seek to hedge
against currency
 
                                      19
<PAGE>
 
exchange rate fluctuations or to seek to increase total return. The Fund may
invest in custodial receipts, Municipal Securities and convertible securities.
The Fund may also employ other investment techniques to seek to enhance
returns, such as lending portfolio securities and entering into mortgage
dollar rolls, repurchase agreements and other investment practices, described
under "Investment Techniques."
 
 GLOBAL INCOME FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high total return, emphasizing current income, and, to a lesser extent,
providing opportunities for capital appreciation.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the J.P. Morgan Global
Government Bond Index (hedged), plus or minus 2.5 years. In addition, under
normal interest rate conditions, the Fund's maximum duration will not exceed
7.5 years. The approximate interest rate sensitivity of the Fund is expected
to be comparable to a six-year bond.
 
  INVESTMENT SECTOR. The Fund invests primarily in a portfolio of high quality
fixed-income securities of U.S. and foreign issuers and enters into
transactions in foreign currencies. Under normal market conditions, the Fund
will (i) have at least 30% of its total assets, after considering the effect
of currency positions, denominated in U.S. dollars and (ii) invest in
securities of issuers in at least three countries. The Fund may also invest up
to 10% of its total assets in issuers in countries with emerging markets and
economies. The Fund seeks to meet its investment objective by pursuing
investment opportunities in foreign and domestic fixed-income securities
markets and by engaging in currency transactions to seek to enhance returns
and to seek to hedge its portfolio against currency exchange rate
fluctuations.
 
  The fixed-income securities in which the Fund may invest include: (i) U.S.
Government Securities and custodial receipts therefor; (ii) securities issued
or guaranteed by a foreign government or any of its political subdivisions,
authorities, agencies, instrumentalities or by supranational entities (i.e.,
international organizations designated or supported by governmental entities
to promote economic reconstruction or development, such as the World Bank);
(iii) corporate debt securities; (iv) certificates of deposit and bankers'
acceptances issued or guaranteed by, or time deposits maintained at, U.S. or
foreign banks (and their branches wherever located) having total assets of
more than $1 billion; (v) commercial paper; and (vi) Mortgage-Backed and
Asset-Backed Securities.
 
  CREDIT QUALITY. All securities purchased by the Fund will be rated, at the
time of investment, at least BBB or Baa by an NRSRO. However, the Fund will
invest at least 50% of its total assets in securities rated, at the time of
investment, AAA or Aaa by an NRSRO. Unrated securities will be determined by
the Investment Adviser to be of comparable quality. Fixed-income securities
rated BBB or Baa are considered medium-grade obligations with speculative
characteristics, and adverse economic conditions or changing circumstances may
weaken their issuers' capability to pay interest and repay principal.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure, to seek to hedge its exposure to foreign
currencies and to seek to enhance returns. These techniques include, but are
not limited to, the use of financial futures contracts, option contracts
(including options on futures), forward foreign currency exchange contracts,
currency options and futures, currency, mortgage, credit and interest rate
swaps and interest rate floors, caps and collars. Currency management
techniques involve risks different from those associated with investing solely
in U.S. dollar-denominated fixed-income securities of U.S.
 
                                      20
<PAGE>
 
issuers. It is expected that the Fund will use certain currency techniques to
seek to hedge against currency exchange rate fluctuations or to seek to
increase total return. While the Fund will have both long and short currency
positions, its net long and short foreign currency exposure will not exceed
the value of the Fund's total assets. To the extent that the Fund is fully
invested in foreign securities while also maintaining currency positions, it
may be exposed to greater combined risk. The Fund's net currency positions may
expose it to risks independent of its securities positions. The Fund may also
employ other investment techniques to seek to enhance returns, such as lending
portfolio securities and entering into mortgage dollar rolls, repurchase
agreements and other investment practices described under "Investment
Techniques."
 
  The Fund may invest more than 25% of its total assets in the securities of
corporate and governmental issuers located in each of Canada, Germany, Japan,
and the United Kingdom as well as in the securities of U.S. issuers.
Concentration of the Fund's investments in such issuers will subject the Fund,
to a greater extent than if investment was more limited, to the risks of
adverse securities markets, exchange rates and social, political or economic
events which may occur in those countries. Not more than 25% of the Fund's
total assets will be invested in securities of issuers in any other single
foreign country.
 
 HIGH YIELD FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income and may also consider the potential for capital
appreciation.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers High
Yield Bond Index, plus or minus 2.5 years. In addition, under normal interest
rate conditions, the Fund's maximum duration will not exceed 7.5 years. The
approximate interest rate sensitivity of the Fund is expected to be comparable
to a 6-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in high yield, fixed-income securities rated, at the
time of investment, below investment grade. Non-investment grade securities
are securities rated BB, Ba or below by an NRSRO, or, if unrated, determined
by the Investment Adviser to be of comparable quality. The Fund may invest in
all types of fixed-income securities, including senior and subordinated
corporate debt obligations (such as bonds, debentures, notes and commercial
paper), convertible and non-convertible corporate debt obligations, loan
participations, custodial receipts, municipal securities and preferred stock.
The Fund may invest up to 25% of its total assets in obligations of domestic
and foreign issuers (including securities of issuers located in countries with
emerging markets and economies) which are denominated in currencies other than
the U.S. dollar. Under normal market conditions, the Fund may invest up to 35%
of its total assets in investment grade fixed-income securities, including
U.S. Government Securities, Asset-Backed and Mortgage-Backed Securities and
corporate securities. The Fund may also invest in common stocks, warrants,
rights and other equity securities, but will generally hold such equity
investments only when debt or preferred stock of the issuer of such equity
securities is held by the Fund. A number of investment strategies are used to
seek to achieve the Fund's investment objective, including market sector
selection, determination of yield curve exposure, and issuer selection. In
addition, the Investment Adviser will attempt to take advantage of pricing
inefficiencies in the fixed-income markets.
 
  CREDIT QUALITY. The Fund invests primarily in high yield, fixed income
securities rated below investment grade, including securities of issuers in
default. Non-investment grade securities (commonly known as "junk bonds") tend
to offer higher yields than higher rated securities with similar maturities.
Non-investment grade
 
                                      21
<PAGE>
 
securities are, however, considered speculative and generally involve greater
price volatility and greater risk of loss of principal and interest than
higher rated securities. See "Description of Securities." A description of the
corporate bond and preferred stock ratings is contained in Appendix B to the
Additional Statement.
 
  For your information, set forth below is the average distribution of ratings
for the portfolio securities (including commercial paper and nonconvertible
bonds) held by Fund during the most recent fiscal year:
 
                                CREDIT QUALITY
 
<TABLE>
<CAPTION>
                                                                   PERCENTAGE OF
                                                                   FUND'S ASSETS
                                                                   -------------
     <S>                                                           <C>
     AAA/Aaa......................................................       1.3%
     AA/Aa........................................................         0%
     A............................................................         0%
     BBB/Baa......................................................       0.3%
     BB/Ba........................................................      13.1%
     Below Ba.....................................................      85.3%
     Not rated....................................................         0%
      Comparable to A.............................................         0%
      Comparable to BBB/Baa.......................................         0%
      Comparable to BB/Ba or lower................................         0%
      Comparable to Below Ba......................................         0%
                                                                       -----
                                                                       100.0%
                                                                       =====
</TABLE>
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure, to seek to hedge its exposure to foreign
securities and to seek to enhance returns. These techniques include, but are
not limited to, the use of financial futures contracts, option contracts
(including options on futures), forward foreign currency exchange contracts,
currency options and futures, currency, mortgage, credit and interest rate
swaps, and interest rate floors, caps and collars. Currency management
techniques involve risks different from those associated with investing solely
in U.S. dollar-denominated fixed-income securities of U.S. issuers. It is
expected that the Fund will use certain currency techniques to seek to hedge
against currency exchange rate fluctuations or to seek to increase total
return. The Fund may also employ other investment techniques to seek to
enhance returns, such as lending portfolio securities and entering into
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 
                           DESCRIPTION OF SECURITIES
 
 
U.S. GOVERNMENT SECURITIES
 
  Each Fund may invest in U.S. Government Securities. Generally, these
securities include U.S. Treasury obligations and obligations issued or
guaranteed by U.S. government agencies, instrumentalities or sponsored
enterprises which are supported by (a) the full faith and credit of the U.S.
Treasury (such as the Government National Mortgage Association ("Ginnie
Mae")), (b) the right of the issuer to borrow from the U.S. Treasury (such as
securities of the Student Loan Marketing Association), (c) the discretionary
authority of the U.S. government to purchase certain obligations of the issuer
(such as the Federal National Mortgage Association ("Fannie Mae") and Federal
Home Loan Mortgage Corporation ("Freddie Mac")), or (d) only the credit of the
issuer. No assurance can be given that the U.S. government will provide
financial support to U.S. government agencies, instrumentalities or sponsored
enterprises in the future.
 
                                      22
<PAGE>
 
  U.S. Government Securities also include Treasury receipts, zero coupon bonds
and other stripped U.S. Government Securities, where the interest and
principal components of stripped U.S. Government Securities are traded
independently. The most widely recognized program is the Separate Trading of
Registered Interest and Principal of Securities Program.
 
MORTGAGE-BACKED SECURITIES
 
  CHARACTERISTICS OF MORTGAGE-BACKED SECURITIES. Mortgage-Backed Securities
represent direct or indirect participations in, or are collateralized by and
payable from, mortgage loans secured by real property. Mortgagors can
generally prepay interest or principal on their mortgage whenever they choose.
Therefore, Mortgage-Backed Securities are often subject to more rapid
repayment than their stated maturity date would indicate as a result of
principal prepayments on the underlying loans. This can result in
significantly greater price and yield volatility than is the case with
traditional fixed-income securities. During periods of declining interest
rates, prepayments can be expected to accelerate, and thus impair a Fund's
ability to reinvest the returns of principal at comparable yields. Conversely,
in a rising interest rate environment, a declining prepayment rate will extend
the average life of many Mortgage-Backed Securities and prevent a Fund from
taking advantage of such higher yields.
 
  FIXED RATE MORTGAGE LOANS. Generally, fixed-rate mortgage loans pay interest
at fixed annual rates and have original terms to maturity ranging from 5 to 40
years. Fixed-rate mortgage loans typically provide for monthly payments of
principal and interest in substantially equal installments for the term of the
mortgage note in sufficient amounts to amortize fully principal by maturity,
although certain fixed-rate mortgage loans provide for a large final "balloon"
payment upon maturity.
 
  ADJUSTABLE RATE MORTGAGE LOANS ("ARMS"). The Adjustable Rate Government Fund
will primarily, and the Short Duration Government, Government Income, Core
Fixed Income, Global Income and High Yield Funds may, invest in ARMs, which
are pass-through mortgage securities collateralized by mortgages with
adjustable rather than fixed coupon rates. ARMs generally provide for a fixed
initial mortgage interest rate for a set period. Thereafter, the interest
rates are subject to periodic adjustments based on changes to a designated
benchmark index.
 
  ARMs allow a Fund to participate in increases in interest rates through
periodic increases in the securities' coupon rates. During periods of
declining interest rates, coupon rates may readjust downward resulting in
lower yields to a Fund. Therefore, the value of an ARM is unlikely to rise
during periods of declining interest rates to the same extent as fixed-rate
securities. Interest rate declines may result in accelerated prepayment of
mortgages with the result that proceeds from prepayments will be reinvested at
lower interest rates. During periods of rising interest rates, changes in the
coupon rate will lag behind changes in the market rate. ARMs are also
typically subject to maximum increases and decreases in the interest rate
adjustment which can be made on any one adjustment date, in any one year, or
during the life of the security. In the event of dramatic increases or
decreases in prevailing market interest rates, the value of a Fund's
investments in ARMs may fluctuate more substantially since these limits may
prevent the security from fully adjusting its interest rate to the prevailing
market rates.
 
  U.S. GOVERNMENT GUARANTEED MORTGAGE-BACKED SECURITIES. Certain Mortgage-
Backed Securities are issued or guaranteed by the U.S. government, its
agencies, instrumentalities or sponsored enterprises. Such issuers include,
but are not limited to, Ginnie Mae, Fannie Mae and Freddie Mac. See "U.S.
Government Securities."
 
                                      23
<PAGE>
 
  PRIVATELY ISSUED MORTGAGE-BACKED SECURITIES. The Government Income, Core
Fixed Income, Global Income and High Yield Funds may invest in Mortgage-Backed
Securities issued or sponsored by non-governmental entities. Privately issued
Mortgage-Backed Securities are generally backed by pools of conventional
(i.e., non-government guaranteed or insured) mortgage loans. Since such
Mortgage-Backed Securities normally are not guaranteed by an entity having the
credit standing of Ginnie Mae, Fannie Mae or Freddie Mac, in order to receive
a high quality rating from the rating organizations (i.e., S&P or Moody's),
they normally are structured with one or more types of "credit enhancement."
 
  MULTIPLE CLASS MORTGAGE-BACKED SECURITIES AND COLLATERALIZED MORTGAGE
OBLIGATIONS. The Adjustable Rate Government, Short Duration Government,
Government Income, Core Fixed Income, Global Income and High Yield Funds may
also invest in multiple class securities, including collateralized mortgage
obligations ("CMOs") and Real Estate Mortgage Investment Conduit ("REMIC")
pass-through or participation certificates. CMOs provide an investor with a
specified interest in the cash flow from a pool of underlying mortgages or of
other Mortgage-Backed Securities. CMOs are issued in multiple classes, each
with a specified fixed or floating interest rate and a final scheduled
distribution date. In most cases, payments of principal are applied to the CMO
classes in the order of their respective stated maturities, so that no
principal payments will be made on a CMO class until all other classes having
an earlier stated maturity date are paid in full. A REMIC is a CMO that
qualifies for special tax treatment under the Internal Revenue Code of 1986,
as amended (the "Code"), and invests in certain mortgages principally secured
by interests in real property and other permitted investments. The Funds do
not intend to purchase residual interests in REMICs.
 
  STRIPPED MORTGAGE-BACKED SECURITIES. The Adjustable Rate Government, Short
Duration Government, Government Income, Core Fixed Income, Global Income and
High Yield Funds may invest in Stripped Mortgage-Backed Securities ("SMBS"),
which are derivative multiple class Mortgage-Backed Securities. SMBS are
usually structured with two different classes: one that receives 100% of the
interest payments and the other that receives 100% of the principal payments
from a pool of mortgage loans. If the underlying mortgage loans experience
different than anticipated prepayments of principal, a Fund may fail to recoup
fully its initial investment in these securities. The market value of the
class consisting entirely of principal payments generally is unusually
volatile in response to changes in interest rates. The yields on a class of
SMBS that receives all or most of the interest from mortgage loans are
generally higher than prevailing market yields on other Mortgage-Backed
Securities because their cash flow patterns are more volatile and there is a
greater risk that the initial investment will not be fully recouped. A Fund's
investments in SMBS may require the Fund to sell certain of its portfolio
securities to generate sufficient cash to satisfy certain income distribution
requirements.
 
ASSET-BACKED SECURITIES
 
  The Government Income, Core Fixed Income, Global Income and High Yield Funds
may invest in Asset-Backed Securities. The principal and interest payments on
Asset-Backed Securities are collateralized by pools of assets such as auto
loans, credit card receivables, leases, installment contracts and personal
property. Such asset pools are securitized through the use of special purpose
trusts or corporations. Principal and interest payments may be credit enhanced
by a letter of credit, a pool insurance policy or a senior/subordinated
structure.
 
LOAN PARTICIPATIONS
 
  The High Yield Fund may invest in loan participations. Such loans must be to
issuers in whose obligations the High Yield Fund may invest. A loan
participation is an interest in a loan to a U.S. or foreign company or other
borrower which is administered and sold by a financial intermediary. In a
typical corporate loan
 
                                      24
<PAGE>
 
syndication, a number of lenders, usually banks (co-lenders), lend a corporate
borrower a specified sum pursuant to the terms and conditions of a loan
agreement. One of the co-lenders usually agrees to act as the agent bank with
respect to the loan.
 
  Participation interests acquired by the High Yield Fund may take the form of
a direct or co-lending relationship with the corporate borrower, an assignment
of an interest in the loan by a co-lender or another participant, or a
participation in the seller's share of the loan. When the High Yield Fund acts
as co-lender in connection with a participation interest or when the High
Yield Fund acquires certain participation interests, the High Yield Fund will
have direct recourse against the borrower if the borrower fails to pay
scheduled principal and interest. In cases where the High Yield Fund lacks
direct recourse, it will look to the agent bank to enforce appropriate credit
remedies against the borrower. In these cases, the High Yield Fund may be
subject to delays, expenses and risks that are greater than those that would
have been involved if the Fund had purchased a direct obligation (such as
commercial paper) of such borrower. For example, in the event of the
bankruptcy or insolvency of the corporate borrower, a loan participation may
be subject to certain defenses by the borrower as a result of improper conduct
by the agent bank. Moreover, under the terms of the loan participation, the
High Yield Fund may be regarded as a creditor of the agent bank (rather than
of the underlying corporate borrower), so that the High Yield Fund may also be
subject to the risk that the agent bank may become insolvent. The secondary
market, if any, for these loan participations is limited and any loan
participations purchased by the High Yield Fund will be regarded as illiquid.
 
  For purposes of certain investment limitations pertaining to diversification
of the High Yield Fund's portfolio investments, the issuer of a loan
participation will be the underlying borrower. However, in cases where the
High Yield Fund does not have recourse directly against the borrower, both the
borrower and each agent bank and co-lender interposed between the High Yield
Fund and the borrower will be deemed issuers of a loan participation.
 
MUNICIPAL SECURITIES
 
  GENERAL. Municipal Securities in which the Short Duration Tax-Free and
Municipal Income Funds and, to a limited extent, the Core Fixed Income and
High Yield Funds invest consist of bonds, notes, commercial paper and other
instruments (including participation interests in such securities) issued by
or on behalf of states, territories and possessions of the United States
(including the District of Columbia) and their political subdivisions,
agencies or instrumentalities, the interest on which, in the opinion of bond
counsel for the issuers or counsel selected by the Investment Adviser, is
exempt from regular federal income tax (i.e., excluded from gross income for
federal income tax purposes but not necessarily exempt from federal
alternative minimum tax or from state or local taxes). Such securities may pay
fixed, variable or floating rates of interest. Municipal Securities are often
issued to obtain funds for various public purposes, including the construction
of a wide range of public facilities such as bridges, highways, housing,
hospitals, mass transportation, schools, streets and water and sewer works.
Other public purposes for which Municipal Securities may be issued include
refunding outstanding obligations, obtaining funds for general operating
expenses, and obtaining funds to lend to other public institutions and
facilities. The Core Fixed Income and High Yield Funds may also invest in
taxable Municipal Securities.
 
  PRIVATE ACTIVITY BONDS. Municipal Securities include "private activity
bonds" or industrial development bonds, which are issued by or on behalf of
public authorities to obtain funds for such projects as privately-operated
housing facilities, airport, mass transit or port facilities and sewage
disposal. In addition, proceeds of certain industrial development bonds are
used for constructing, equipping, repairing or improving privately operated
industrial or commercial facilities. The Short Duration Tax-Free and Municipal
Income Funds'
 
                                      25
<PAGE>
 
distributions attributable to the interest income from private activity bonds
may subject certain investors to the federal alternative minimum tax.
 
  MUNICIPAL LEASES AND CERTIFICATES OF PARTICIPATION. A municipal lease is an
obligation in the form of a lease or installment purchase which is issued by a
state or local government to acquire equipment and facilities. Certificates of
participation represent undivided interests in municipal leases, installment
purchase agreements or other instruments. The primary risk associated with
municipal lease obligations and certificates of participation is that the
governmental lessee will fail to appropriate funds to enable it to meet its
payment obligations under the lease. Although the obligations may be secured
by the leased equipment or facilities, the disposition of the property in the
event of non-appropriation or foreclosure might prove difficult, time
consuming and costly, and result in a delay in recovering or the failure to
fully recover the Fund's original investment. To the extent that a Fund
invests in unrated municipal leases or participates in such leases, the credit
quality rating and risk of cancellation of such unrated leases will be
monitored on an ongoing basis. Certain municipal lease obligations and
certificates of participation may be deemed illiquid for the purpose of a
Fund's limitation on investments in illiquid securities.
 
  PRE-REFUNDED MUNICIPAL SECURITIES. The interest and principal payments on
pre-refunded Municipal Securities are typically paid from the cash flow
generated from an escrow fund consisting of U.S. Government Securities. These
payments have been "pre-refunded" using the escrow fund.
 
  INSURED SECURITIES. "Insured" Municipal Securities are those for which
scheduled payments of interest and principal are guaranteed by a private (non-
governmental) insurance company. The insurance entitles a Fund to receive only
the face or par value of the securities held by the Fund. The insurance does
not guarantee the market value of the Municipal Securities or the net asset
value of a Fund's shares.
 
  AUCTION RATE SECURITIES. Auction rate Municipal Securities permit the holder
to sell the securities in an auction at par value at specified intervals. The
dividend or interest is typically reset by "Dutch" auction in which bids are
made by broker-dealers and other institutions for a certain amount of
securities at a specified minimum yield. The rate set by the auction is the
lowest interest or dividend rate that covers all securities offered for sale.
While this process is designed to permit auction rate securities to be traded
at par value, there is the risk that an auction will fail due to insufficient
demand for the securities. A Fund will take the time remaining until the next
scheduled auction date into account for purposes of determining the
securities' duration.
 
CORPORATE DEBT OBLIGATIONS
 
  The Government Income, Core Fixed Income, Global Income and High Yield Funds
may invest in corporate debt obligations. In addition to obligations of
corporations, corporate debt obligations include securities issued by banks
and other financial institutions. Corporate debt obligations are subject to
the risk of an issuer's inability to meet principal and interest payments on
the obligations.
 
  The Government Income, Core Fixed Income, Global Income and High Yield Funds
may also invest in trust preferred securities. A trust preferred or capital
security is a long dated bond (for example, 30 years) with preferred features.
The preferred features are that payment of interest can be deferred for a
specified period without initiating a default event. From a bondholder's
viewpoint, the securities are senior in claim to standard preferred stock but
junior to other bondholders. From the issuer's viewpoint, the securities are
attractive because their interest is deductible for tax purposes like other
types of debt instruments.
 
 
                                      26
<PAGE>
 
CONVERTIBLE SECURITIES
 
  The Core Fixed Income and High Yield Funds may invest in convertible
securities, including debt obligations, and for High Yield Fund preferred
stock, of an issuer convertible at a stated exchange rate into common stock of
the issuer. Convertible securities generally offer lower interest or dividend
yields than non-convertible securities of similar quality. As with all debt
securities, the market value of convertible securities tends to decline as
interest rates increase and, conversely, to increase as interest rates
decline. However, when the market price of the common stock underlying a
convertible security exceeds the conversion price, the price of the
convertible security tends to reflect the market price of the underlying
common stock. As the market price of the underlying common stock declines, the
convertible security tends to trade increasingly on a yield basis, and thus
may not depreciate to the same extent as the underlying common stock.
Convertible securities in which a Fund invests are subject to the same rating
criteria as its other investments in fixed-income securities.
 
PREFERRED STOCK, WARRANTS AND RIGHTS
 
  The High Yield Fund may invest in preferred stock, warrants and rights.
Preferred stocks are securities that represent an ownership interest providing
the holder with claims on the issuer's earnings and assets before common stock
owners but after bond owners. Unlike debt securities, the obligations of an
issuer of preferred stock, including dividend and other payment obligations,
may not typically be accelerated by the holders of such preferred stock on the
occurrence of an event of default (such as a covenant default or filing of a
bankruptcy petition) or other non-compliance by the issuer with the terms of
the preferred stock. Often, however, on the occurrence of any such event of
default or non-compliance by the issuer, preferred stockholders will be
entitled to gain representation on the issuer's board of directors or increase
their existing board representation. In addition, preferred stockholders may
be granted voting rights with respect to certain issues on the occurrence of
any event of default.
 
  Warrants and other rights are options to buy a stated number of shares of
common stock at a specified price at any time during the life of the warrant.
The holders of warrants and rights have no voting rights, receive no dividends
and have no rights with respect to the assets of the issuer.
 
FOREIGN INVESTMENTS
 
  FOREIGN SECURITIES. The Global Income Fund will, and the Core Fixed Income
and High Yield Funds may, invest in fixed-income securities of foreign issuers
denominated in any currency. However, the Core Fixed Income and High Yield
Funds will limit their investments in non-U.S. dollar-denominated fixed-income
securities to 25% of their total assets. Investment in foreign securities may
offer potential benefits that are not available from investing exclusively in
U.S. dollar-denominated domestic issues. Foreign countries may have economic
policies or business cycles different from those of the U.S. and markets for
foreign fixed-income securities do not necessarily move in a manner parallel
to U.S. markets.
 
  Investing in the securities of foreign issuers involves risks that are not
typically associated with investing in fixed-income securities of domestic
issuers quoted in U.S. dollars. Such investments may be affected by changes in
currency rates, changes in foreign or U.S. laws or restrictions applicable to
such investments and in exchange control regulations (e.g., currency
blockage). A decline in the exchange rate of the currency (i.e., weakening of
the currency against the U.S. dollar) in which a portfolio security is quoted
or denominated relative to the U.S. dollar would reduce the value of the
portfolio security. In addition, if the currency in which a Fund receives
dividends, interest or other payments declines in value against the U.S.
dollar before such income is distributed as dividends to shareholders or
converted to U.S. dollars, the Fund may have to sell portfolio securities to
obtain
 
                                      27
<PAGE>
 
sufficient cash to pay such dividends. The expected introduction of a single
currency, the euro, on January 1, 1999, for participating European nations in
the Economic and Monetary Union ("EU") presents unique uncertainties,
including whether the payment and operational systems of banks and other
financial institutions will be ready by the scheduled launch date; the
creation of suitable clearing and settlement payment systems for the new
currency; the legal treatment of certain outstanding financial contracts after
January 1, 1999, that refer to existing currencies rather than the euro; the
establishment and maintenance of exchange rates for currencies being converted
into the euro and the euro; the fluctuation of the euro relative to non-euro
currencies during the transition period from January 1, 1999 to December 31,
2000 and beyond; whether the interest rate, tax and labor regimes of European
countries participating in the euro will converge over time; and whether the
conversion of the currencies of other EU countries such as the United Kingdom,
Denmark and Greece into the euro and the admission of other non-EU countries
such as Poland, Latvia and Lithuania as members of the EU may have an impact
on the euro. These or other factors, including political and economic risks,
could cause market disruptions before or after the introduction of the euro,
and could adversely affect the value of securities and foreign currencies held
by the Funds. In addition, clearance and settlement procedures may be
different in foreign countries and, in certain markets, such procedures have
been unable to keep pace with the volume of securities transactions, making it
more difficult to conduct such transactions.
 
  The Core Fixed Income, Global Income and High Yield Funds may invest in an
issuer domiciled in one country yet issuing the security in the currency of
another country. The Funds may also invest in debt securities denominated in
the European Currency Unit ("ECU"), which is a "basket" consisting of
specified amounts in the currencies of certain of the twelve member states of
the European Community. The specific amounts of currencies comprising the ECU
may be adjusted by the Council of Ministers of the European Community from
time to time to reflect changes in relative values of the underlying
currencies. In addition, the Funds may invest in securities denominated in
other currency "baskets."
 
  Foreign issuers are not generally subject to uniform accounting, auditing
and financial reporting standards comparable to those applicable to U.S.
issuers. There may be less publicly available information about a foreign
issuer than about a U.S. issuer. In addition, there is generally less
government regulation of foreign markets, companies and securities dealers
than in the U.S. Foreign securities markets may have substantially less volume
than U.S. securities markets and securities of many foreign issuers may be
less liquid and more volatile than securities of comparable domestic issuers.
Furthermore, with respect to certain foreign countries, there is a possibility
of nationalization, expropriation or confiscatory taxation, imposition of
withholding or other taxes on dividend or interest payments (or, in some
cases, capital gains), limitations on the removal of funds or other assets of
a Fund, political or social instability or diplomatic developments which could
affect investments in those countries.
 
  FOREIGN GOVERNMENT SECURITIES. The Core Fixed Income, Global Income and High
Yield Funds may invest in debt obligations of foreign governments and
governmental agencies, including those of emerging countries. Investment in
sovereign debt obligations involves special risks not present in debt
obligations of corporate issuers. The issuer of the debt or the governmental
authorities that control the repayment of the debt may be unable or unwilling
to repay principal or interest when due in accordance with the terms of such
debt, and a Fund may have limited recourse in the event of a default. Periods
of economic uncertainty may result in volatility of market prices of sovereign
debt, and in turn a Fund's net asset value, to a greater extent than the
volatility inherent in debt obligations of U.S. issuers. A sovereign debtor's
willingness or ability to repay principal and pay interest in a timely manner
may be affected by, among other factors, its cash flow situation, the extent
of its foreign currency reserves, the availability of sufficient foreign
exchange on the date a payment
 
                                      28
<PAGE>
 
is due, the relative size of the debt service burden to the economy as a
whole, the sovereign debtor's policy toward international lenders and the
political constraints to which a sovereign debtor may be subject.
 
  EMERGING MARKETS. The Core Fixed Income and Global Income Funds may invest
up to 10% and the High Yield Fund may invest up to 25% of their total assets
in securities of issuers located in countries with emerging economies or
securities markets ("emerging markets"). Political and economic structures in
many emerging markets may be undergoing significant evolution and rapid
development, and emerging markets may lack the social, political and economic
stability characteristic of more developed countries. As a result, the risks
relating to investments in foreign securities described above, including the
possibility of nationalization, expropriation and confiscatory taxation, may
be heightened. In addition, unanticipated political and social developments
may affect the value of a Fund's investments in emerging markets and the
availability to the Fund of additional investments in such countries. The
small size and inexperience of the securities markets in certain emerging
markets and the limited volume of trading in securities in those countries may
make a Fund's investments in such countries less liquid and more volatile than
investments in countries with more developed securities markets (such as the
U.S., Japan and most Western European countries). See the Additional Statement
for further information regarding a Fund's investments in emerging markets.
 
  FOREIGN CURRENCY TRANSACTIONS. Because investment in foreign issuers by the
Core Fixed Income, Global Income and High Yield Funds will usually involve
currencies of foreign countries, and because the Funds may have currency
exposure independent of their securities positions, the value of the assets of
a Fund as measured in U.S. dollars will be affected by changes in foreign
currency exchange rates. A Fund may, to the extent it invests in foreign
securities, purchase or sell foreign currencies on a spot basis and may also
purchase or sell forward foreign currency exchange contracts for hedging
purposes and to seek to protect against anticipated changes in future foreign
currency exchange rates. In addition, a Fund also may enter into such
contracts to seek to increase total return when the Investment Adviser
anticipates that the foreign currency will appreciate or depreciate in value,
but securities denominated or quoted in that currency do not present
attractive investment opportunities and are not held in the Fund's portfolio.
When entered into to seek to increase total return, forward foreign currency
exchange contracts are considered speculative. The Funds may also engage in
cross-hedging by using forward contracts in a currency different from that in
which the hedged security is denominated or quoted if the Investment Adviser
determines that there is a pattern of correlation between the two currencies.
If a Fund enters into a forward foreign currency exchange contract to buy
foreign currency for any purpose or to sell foreign currency to seek to
increase total return, the Fund will be required to place cash or liquid
assets in a segregated account with the Fund's custodian in an amount equal to
the value of the Fund's total assets committed to the consummation of the
forward contract, or to otherwise cover its position in a manner permitted by
the SEC. A Fund will incur costs in connection with conversions between
various currencies. A Fund may hold foreign currency received in connection
with investments in foreign securities when, in the judgment of the Investment
Adviser, it would be beneficial to convert such currency into U.S. dollars at
a later date, based on anticipated changes in the relevant exchange rate.
 
  Currency exchange rates may fluctuate significantly over short periods of
time causing, along with other factors, a Fund's net asset value to fluctuate.
Currency exchange rates generally are determined by the forces of supply and
demand in the foreign exchange markets and the relative merits of investments
in different countries, actual or anticipated changes in interest rates and
other complex factors, as seen from an international perspective. Currency
exchange rates also can be affected unpredictably by the intervention of U.S.
or foreign governments or central banks, or the failure to intervene, or by
currency controls or political developments in the U.S. or abroad. To the
extent that a substantial portion of a Fund's total assets, adjusted to
reflect the Fund's net position after giving effect to currency transactions,
is denominated or quoted in the currencies of foreign
 
                                      29
<PAGE>
 
countries, the Fund will be more susceptible to the risk of adverse economic
and political developments within those countries.
 
  The market in forward foreign currency exchange contracts, currency swaps
and other privately negotiated currency instruments offers less protection
against defaults by the other party to such instruments than is available for
currency instruments traded on an exchange. Such contracts are subject to the
risk that the counterparty to the contract will default on its obligations.
Since these contracts are not guaranteed by an exchange or clearinghouse, a
default on a contract would deprive a Fund of unrealized profits, transaction
costs or the benefits of a currency hedge or force the Fund to cover its
purchase or sale commitments, if any, at the current market price. A Fund will
not enter into forward foreign currency exchange contracts, currency swaps or
other privately negotiated currency instruments unless the credit quality of
the unsecured senior debt or the claims-paying ability of the counterparty is
considered to be investment grade by the Investment Adviser.
 
  The Core Fixed Income, Global Income and High Yield Funds' use of foreign
currency management techniques in emerging markets may be limited. Due to the
limited market for these instruments in emerging markets, the Investment
Adviser does not currently anticipate that a significant portion of the Funds'
currency exposure in emerging markets, if any, will be covered by such
instruments. For a discussion of such instruments and the risks associated
with their use, see "Investment Objectives and Policies" in the Additional
Statement.
 
STRUCTURED SECURITIES
 
  The Core Fixed Income, Global Income and High Yield Funds may invest in
structured securities. The value of the principal of and/or interest on such
securities is determined by reference to changes in the value of specific
currencies, interest rates, commodities, indices or other financial indicators
(the "Reference") or the relative change in two or more References. The
interest rate or the principal amount payable upon maturity or redemption may
be increased or decreased depending upon changes in the applicable Reference.
The terms of the structured securities may provide that in certain
circumstances no principal is due at maturity and, therefore, result in the
loss of a Fund's investment. Structured securities may be positively or
negatively indexed, so that appreciation of the Reference may produce an
increase or decrease in the interest rate or value of the security at
maturity. In addition, changes in the interest rates or the value of the
security at maturity may be a multiple of changes in the value of the
Reference. Consequently, structured securities may entail a greater degree of
market risk than other types of fixed-income securities. Structured securities
may also be more volatile, less liquid and more difficult to accurately price
than less complex securities.
 
ZERO COUPON, DEFERRED INTEREST, PAY-IN-KIND AND CAPITAL APPRECIATION BONDS
 
  Each Fund may invest in zero coupon, deferred interest and capital
appreciation bonds. These are securities issued at a discount from their face
value because interest payments are typically postponed until maturity. The
amount of the discount rate varies depending on factors including the time
remaining until maturity, prevailing interest rates, the security's liquidity
and the issuer's credit quality. These securities also may take the form of
debt securities that have been stripped of their interest payments. Each Fund
may also invest in pay-in-kind securities which are securities that have
interest payable by the delivery of additional securities. A portion of the
discount with respect to stripped tax-exempt securities or their coupons may
be taxable. The market prices of zero coupon, deferred interest, pay-in-kind
and capital appreciation bonds generally are more volatile than the market
prices of interest-bearing securities and are likely to respond to a greater
degree to changes in interest rates than interest-bearing securities having
similar maturities and credit quality. A Fund's investments in zero coupon,
deferred interest, pay-in-kind and capital appreciation bonds may require the
Fund to sell certain of its portfolio securities to generate sufficient cash
to satisfy certain income distribution requirements. See "Taxation" in the
Additional Statement.
 
                                      30
<PAGE>
 
 
                                 RISK FACTORS
 
 
  INTEREST RATE RISK. When interest rates decline, the market value of fixed-
income securities tends to increase. Conversely, when interest rates increase,
the market value of fixed-income securities tends to decline. Volatility of a
security's market value will differ depending upon the security's duration,
the issuer and the type of instrument.
 
  DEFAULT RISK/CREDIT RISK. Investments in fixed-income securities are subject
to the risk that the issuer could default on its obligations and a Fund could
sustain losses on such investments. A default could impact both interest and
principal payments.
 
  CALL RISK AND EXTENSION RISK. Fixed-income securities may be subject to both
call risk and extension risk. Call risk (i.e., where the issuer exercises its
right to pay principal on an obligation earlier than scheduled) causes cash
flow to be returned earlier than expected. Call risk typically results when
interest rates have declined. Under such circumstances, a Fund may be unable
to recoup all of its initial investment and will also suffer from having to
reinvest in lower yielding securities. Extension risk (i.e., where the issuer
exercises its right to pay principal on an obligation later than scheduled)
causes cash flows to be returned later than expected. Extension risk typically
results when interest rates have increased. Under such circumstances, a Fund
will suffer from the inability to invest in higher yielding securities.
Certain types of U.S. Government, Asset-Backed, corporate, foreign, Mortgage-
Backed and Municipal Securities have this call and/or extension risk.
 
  The investment characteristics of Mortgage-Backed Securities and Asset-
Backed Securities differ from those of traditional fixed-income securities
because they generally have both call risk (also known as prepayment risk) and
extension risk. Homeowners have the option to prepay their mortgage.
Therefore, the duration of a security backed by home mortgages can either
shorten (call risk) or lengthen (extension risk). Investors are exposed to the
fluctuating principal and interest payments associated with such securities.
In general, if interest rates on new mortgage loans fall sufficiently below
the interest rates on existing outstanding mortgage loans, the rate of
prepayment would be expected to increase. Conversely, if mortgage loan
interest rates rise above the interest rates on existing outstanding mortgage
loans, the rate of prepayment would be expected to decrease.
 
  ARMs also have the risk of prepayments, which will have a greater impact on
the Adjustable Rate Government Fund. The rate of principal prepayments with
respect to ARMs has fluctuated in recent years. As with fixed-rate mortgage
loans, ARMs may be subject to a greater rate of principal repayments in a
declining interest rate environment. For example, if prevailing interest rates
fall significantly, ARMs could be subject to higher prepayment rates (than if
prevailing interest rates remain constant or increase) because the
availability of low fixed-rate mortgages may encourage mortgagors to refinance
their ARMs to "lock-in" a fixed-rate mortgage. Conversely, if prevailing
interest rates rise significantly, ARMs may prepay more slowly. As with fixed-
rate mortgages, ARM prepayment rates vary in both stable and changing interest
rate environments. There are certain ARMs where the homeowner's payments do
not fully cover interest, so the principal balance increases over time. These
"negative amortizing" ARMs may be subject to greater default risk.
 
  DERIVATIVE MORTGAGE-BACKED SECURITIES. Because derivative Mortgage-Backed
Securities (such as principal-only (POs), interest-only (IOs) or inverse
floating rate securities) are more exposed to mortgage prepayments, they
generally involve a greater amount of risk. Small changes in prepayments can
significantly impact the cash flow and the market value of these securities.
The risk of faster than anticipated prepayments
 
                                      31
<PAGE>
 
generally adversely affects IOs, super floaters and premium priced Mortgage-
Backed Securities. The risk of slower than anticipated prepayments generally
adversely affects POs, floating-rate securities subject to interest rate caps,
support tranches and discount priced Mortgage-Backed Securities. In addition,
particular derivative securities may be leveraged such that their exposure
(i.e., price sensitivity) to interest rate and/or prepayment risk is
magnified.
 
  RISKS OF DERIVATIVE TRANSACTIONS. A Fund's transactions, if any, in options,
futures, options on futures, swaps, interest rate caps, floors and collars,
structured securities, inverse floating-rate securities and currency
transactions involve certain risks, including a possible lack of correlation
between changes in the value of hedging instruments and the portfolio assets
being hedged, the potential illiquidity of the markets for derivative
instruments, the risks arising from margin requirements and related leverage
factors associated with such transactions. The use of these management
techniques to seek to increase total return may be regarded as a speculative
practice and involves the risk of loss if the Investment Adviser is incorrect
in its expectation of fluctuations in securities prices, interest rates or
currency prices. A Fund's use of certain derivative transactions may be
limited by the requirements of the Internal Revenue Code of 1986, as amended
(the "Code") for qualification as a regulated investment company.
 
  TAX RISK OF MUNICIPAL SECURITIES. The yields and market values of Municipal
Securities may be more adversely impacted by changes in tax rates and policies
than taxable fixed-income securities. Because interest income from Municipal
Securities is normally not subject to regular federal income taxation, the
attractiveness of Municipal Securities in relation to other investment
alternatives is affected by changes in federal income tax rates applicable to,
or the continuing federal income tax-exempt status of, such interest income.
Any proposed or actual changes in such rates or exempt status, therefore, can
significantly affect the demand for and supply, liquidity and marketability of
Municipal Securities, which could in turn affect a Fund's ability to acquire
and dispose of Municipal Securities at desirable yield and price levels.
 
  RISKS OF INVESTING IN NON-INVESTMENT GRADE FIXED-INCOME SECURITIES. Non-
investment grade fixed-income securities are considered predominantly
speculative by traditional investment standards. In some cases, these
obligations may be highly speculative and have poor prospects for reaching
investment grade standing. Non-investment grade fixed-income securities and
unrated securities of comparable credit quality (commonly known as "junk
bonds") are subject to the increased risk of an issuer's inability to meet
principal and interest obligations. These securities, also referred to as high
yield securities, may be subject to greater price volatility due to such
factors as specific corporate developments, interest rate sensitivity,
negative perceptions of the junk bond markets generally and less secondary
market liquidity.
 
  Non-investment grade fixed-income securities are often issued in connection
with a corporate reorganization or restructuring or as part of a merger,
acquisition, takeover or similar event. They are also issued by less
established companies seeking to expand. Such issuers are often highly
leveraged and generally less able than more established or less leveraged
entities to make scheduled payments of principal and interest in the event of
adverse developments or business conditions.
 
  The market value of non-investment grade fixed-income securities tends to
reflect individual corporate developments to a greater extent than that of
higher rated securities which react primarily to fluctuations in the general
level of interest rates. As a result, a Fund's ability to achieve its
investment objectives may depend to a greater extent on the Investment
Adviser's judgment concerning the creditworthiness of issuers than funds which
invest in higher-rated securities. Issuers of non-investment grade fixed-
income securities may not be able to make use of more traditional methods of
financing and their ability to service debt obligations may be more adversely
 
                                      32
<PAGE>
 
affected than issuers of higher-rated securities by economic downturns,
specific corporate developments or the issuer's inability to meet specific
projected business forecasts. Negative publicity about the junk bond market
and investor perceptions regarding lower rated securities, whether or not
based on fundamental analysis, may depress the prices for such securities.
 
  A holder's risk of loss from default is significantly greater for non-
investment grade fixed-income securities than is the case for holders of other
debt securities because such non-investment grade securities are generally
unsecured and are often subordinated to the rights of other creditors of the
issuers of such securities. Investment by a Fund in defaulted securities poses
additional risk of loss should nonpayment of principal and interest continue
in respect of such securities. Even if such securities are held to maturity,
recovery by a Fund of its initial investment and any anticipated income or
appreciation is uncertain.
 
  The secondary market for non-investment grade fixed-income securities is
concentrated in relatively few market makers and is dominated by institutional
investors, including mutual funds, insurance companies and other financial
institutions. Accordingly, the secondary market for such securities is not as
liquid as, and is more volatile than, the secondary market for higher-rated
securities. In addition, market trading volume for high yield fixed-income
securities is generally lower and the secondary market for such securities
could contract under adverse market or economic conditions, independent of any
specific adverse changes in the condition of a particular issuer. These
factors may have an adverse effect on the market price and a Fund's ability to
dispose of particular portfolio investments. A less liquid secondary market
also may make it more difficult for a Fund to obtain precise valuations of the
high yield securities in its portfolio.
 
  Credit ratings issued by credit rating agencies are designed to evaluate the
safety of principal and interest payments of rated securities. They do not,
however, evaluate the market value risk of non-investment grade securities
and, therefore, may not fully reflect the true risks of an investment. In
addition, credit rating agencies may or may not make timely changes in a
rating to reflect changes in the economy or in the conditions of the issuer
that affect the market value of the security. Consequently, credit ratings are
used only as a preliminary indicator of investment quality. Investments in
non-investment grade and comparable unrated obligations will be more dependent
on the Investment Adviser's credit analysis than would be the case with
investments in investment-grade debt obligations. The Investment Adviser
employs its own credit research and analysis, which includes a study of
existing debt, capital structure, ability to service debt and to pay
dividends, the issuer's sensitivity to economic conditions, its operating
history and the current trend of earnings. The Investment Adviser continually
monitors the investments in a Fund's portfolio and evaluates whether to
dispose of or to retain non-investment grade and comparable unrated securities
whose credit ratings or credit quality may have changed.
 
  OTHER RISKS. Floating-rate derivative debt securities present more complex
types of interest rate risks. For example, range floaters are subject to the
risk that the coupon will be reduced below market rates if a designated
interest rate floats outside of a specified interest rate band or collar. Dual
index or yield curve floaters are subject to lower prices in the event of an
unfavorable change in the spread between two designated interest rates.
 
  Asset-Backed Securities present certain credit risks that are not presented
by Mortgage-Backed Securities because Asset-Backed Securities generally do not
have the benefit of a security interest in collateral that is comparable to
mortgage assets. There is the possibility that, in some cases, recoveries on
repossessed collateral may not be available to support payments on these
securities.
 
  FOREIGN RISKS. See "Foreign Securities" for a description of the risks of
investing in foreign securities and currencies.
 
                                      33
<PAGE>
 
 
                             INVESTMENT TECHNIQUES
 
 
  MORTGAGE DOLLAR ROLLS. The Adjustable Rate Government, Short Duration
Government, Government Income, Core Fixed Income and Global Income Funds may
enter into mortgage "dollar rolls" in which a Fund sells securities for
delivery in the current month and simultaneously contracts with the same
counterparty to repurchase substantially similar (same type, coupon and
maturity) but not identical securities on a specified future date. During the
roll period, the Fund loses the right to receive principal and interest paid
on the securities sold. However, the Fund would benefit to the extent of any
difference between the price received for the securities sold and the lower
forward price for the future purchase or fee income plus the interest earned
on the cash proceeds of the securities sold until the settlement date for the
forward purchase. Unless such benefits exceed the income, capital appreciation
and gain or loss due to mortgage prepayments that would have been realized on
the securities sold as part of the mortgage dollar roll, the use of this
technique will diminish the investment performance of the Fund. Successful use
of mortgage dollar rolls depends upon the Investment Adviser's ability to
predict correctly interest rates and mortgage prepayments. There is no
assurance that mortgage dollar rolls can be successfully employed. The Fund
will hold and maintain in a segregated account until the settlement date cash
or liquid assets in an amount equal to the forward purchase price. For
financial reporting and tax purposes, each Fund treats mortgage dollar rolls
as two separate transactions; one involving the purchase of a security and a
separate transaction involving a sale. The Funds do not currently intend to
enter into mortgage dollar rolls that are accounted for as a financing.
 
  OPTIONS ON SECURITIES AND SECURITIES INDICES. Each Fund may write (sell)
covered call and put options and purchase put and call options on any
securities in which it may invest or on any securities index comprised of
securities in which it may invest. The writing and purchase of options is a
highly specialized activity which involves investment techniques and risks
different from those associated with ordinary portfolio securities
transactions. The use of options to seek to increase total return involves the
risk of loss if the Investment Adviser is incorrect in its expectation of
fluctuations in securities prices or interest rates. The successful use of
options for hedging purposes also depends in part on the ability of the
Investment Adviser to manage future price fluctuations and the degree of
correlation between the options and securities markets. If the Investment
Adviser is incorrect in its expectation of changes in securities prices or
determination of the correlation between the securities indices on which
options are written and purchased and the securities in a Fund's investment
portfolio, the investment performance of the Fund will be less favorable than
it would have been in the absence of such options transactions. The writing of
options could increase a Fund's portfolio turnover rate and, therefore,
associated brokerage commissions or spreads.
 
  OPTIONS ON FOREIGN CURRENCIES. The Core Fixed Income, Global Income and High
Yield Funds may, to the extent they invest in foreign securities, purchase and
sell (write) put and call options on foreign currencies for the purpose of
protecting against declines in the U.S. dollar value of foreign portfolio
securities and against increases in the U.S. dollar cost of foreign securities
to be acquired. In addition, the Core Fixed Income, Global Income and High
Yield Funds may use options on currency to cross-hedge, which involves writing
or purchasing options on one currency to hedge against changes in exchange
rates for a different currency, if there is a pattern of correlation between
the two currencies. As with other kinds of option transactions, however, the
writing of an option on foreign currency will constitute only a partial hedge,
up to the amount of the premium received. If an option that a Fund has written
is exercised, the Fund could be required to purchase or sell foreign
currencies at disadvantageous exchange rates, thereby incurring losses. The
purchase of an option on foreign currency may constitute an effective hedge
against exchange rate fluctuations; however, in the event of exchange rate
 
                                      34
<PAGE>
 
movements adverse to a Fund's position, the Fund may forfeit the entire amount
of the premium plus related transaction costs. In addition to purchasing put
and call options for hedging purposes, a Fund may purchase call or put options
on currency to seek to increase total return when the Investment Adviser
anticipates that the currency will appreciate or depreciate in value, but the
securities quoted or denominated in that currency do not present attractive
investment opportunities and are not held in the Fund's portfolio. When
purchased or sold to seek to increase total return, options on currencies are
considered speculative. Options on foreign currencies to be written or
purchased by the Funds will be traded on U.S. and foreign exchanges or over-
the-counter.
 
  FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS. To seek to increase
total return, to hedge against changes in interest rates or securities prices,
or in the case of the Core Fixed Income, Global Income and High Yield Funds,
currency exchange rates, a Fund may purchase and sell various kinds of futures
contracts, and purchase and write call and put options on any of such futures
contracts. Each Fund may also enter into closing purchase and sale
transactions with respect to any such contracts and options. The futures
contracts may be based on various securities (such as U.S. Government
Securities), foreign currencies, in the case of the Core Fixed Income, Global
Income and High Yield Funds, securities indices and other financial
instruments and indices. A Fund will engage in futures and related options
transactions for bona fide hedging purposes as defined in regulations of the
Commodity Futures Trading Commission or to seek to increase total return to
the extent permitted by such regulations. A Fund may not purchase or sell
futures contracts or purchase or sell related options to seek to increase
total return, except for closing purchase or sale transactions, if immediately
thereafter the sum of the amount of initial margin deposits and premiums paid
on a Fund's outstanding positions in futures and related options entered into
for the purpose of seeking to increase total return would exceed 5% of the
market value of a Fund's net assets. These transactions involve brokerage
costs, require margin deposits and, in the case of contracts and options
obligating a Fund to purchase securities or currencies, require the Fund to
segregate and maintain cash or liquid assets with a value equal to the amount
of the Fund's obligations or to otherwise cover the obligations in a manner
permitted by the SEC.
 
  While transactions in futures contracts and options on futures may reduce
certain risks, such transactions themselves entail certain other risks. See
"Investment Techniques--Futures Contracts and Options on Futures Contracts" in
the Additional Statement. Thus, while a Fund may benefit from the use of
futures and options on futures, unanticipated changes in interest rates,
securities prices or currency exchange rates may result in a poorer overall
performance than if the Fund had not entered into any futures contracts or
options transactions. Because perfect correlation between a futures position
and portfolio position that is intended to be protected is impossible to
achieve, the desired protection may not be obtained and a Fund may be exposed
to risk of loss. The loss incurred by a Fund in entering into futures
contracts and in writing call options on futures is potentially unlimited and
may exceed the amount of the premium received. Futures markets are highly
volatile and the use of futures may increase the volatility of a Fund's net
asset value. The profitability of a Fund's trading in futures to seek to
increase total return depends upon the ability of the Investment Adviser to
analyze correctly the futures markets. In addition, because of the low margin
deposits normally required in futures trading, a relatively small price
movement in a futures contract may result in substantial losses to a Fund.
Further, futures contracts and options on futures may be illiquid, and
exchanges may limit fluctuations in futures contract prices during a single
day.
 
  CURRENCY SWAPS. The Core Fixed Income, Global Income and High Yield Funds
may enter into currency swaps for hedging purposes or to seek to increase
total return. Currency swaps involve the exchange by a Fund with another party
of their respective rights to make or receive payments in specified
currencies. Currency swaps usually involve the delivery of a gross payment
stream in one designated currency in exchange for the gross payment stream in
another designated currency. Therefore, the entire payment stream under a
currency swap is
 
                                      35
<PAGE>
 
subject to the risk that the other party to the swap will default on its
contractual delivery obligations. A Fund will not enter into swap transactions
unless the unsecured commercial paper, senior debt or claims-paying ability of
the other party thereto is rated investment grade by S&P or Moody's, or, if
unrated by such rating organizations, determined to be of comparable quality
by the Investment Adviser. The use of currency swaps is a highly specialized
activity which involves investment techniques and risks different from those
associated with ordinary portfolio securities transactions. If the Investment
Adviser is incorrect in its forecasts of currency exchange rates, the
investment performance of a Fund would be less favorable than it would have
been if this investment technique were not used.
 
  WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS. Each Fund may purchase when-
issued securities. When-issued transactions arise when securities are
purchased by a Fund with payment and delivery taking place in the future in
order to secure what is considered to be an advantageous price and yield to
the Fund at the time of entering into the transaction. Each Fund may also
purchase or sell securities on a forward commitment basis; that is, make
contracts to purchase or sell securities for a fixed price at a future date
beyond the customary three-day settlement. The purchase of securities on a
when-issued or forward commitment basis involves a risk of loss if the value
of the security to be purchased declines prior to the settlement date.
Conversely, securities sold on a forward commitment basis involve the risk
that the value of the securities to be sold may increase prior to the
settlement date. Although a Fund would generally purchase securities on a
when-issued or forward commitment basis with the intention of acquiring
securities for its portfolio, a Fund may dispose of when-issued securities or
forward commitments prior to settlement if the Investment Adviser deems it
appropriate to do so. A Fund is required to hold and maintain in a segregated
account with the Fund's custodian until three days prior to settlement date,
cash or liquid assets in an amount sufficient to meet the purchase price.
Alternatively, each Fund may enter into offsetting contracts for the forward
sale of other securities that it owns.
 
  ILLIQUID AND RESTRICTED SECURITIES. A Fund may not invest more than 15% of
its net assets in illiquid investments, which include securities (both foreign
and domestic) that are not readily marketable, certain SMBS, certain municipal
leases and participation interests, repurchase agreements maturing in more
than seven days, time deposits with a notice or demand period of more than
seven days, certain over-the-counter options, and certain restricted
securities, unless it is determined, based upon the continuing review of the
trading markets for a specific restricted security, that such restricted
security is eligible for resale under Rule 144A under the Securities Act of
1933 and, therefore, is liquid. The Trustees have adopted guidelines under
which the Investment Adviser determines and monitors the liquidity of
portfolio securities subject to the oversight of the Trustees. Investing in
restricted securities eligible for resale pursuant to Rule 144A may decrease
the liquidity in a Fund to the extent that qualified institutional buyers
become for a time uninterested in purchasing these restricted securities. The
purchase price and subsequent valuation of restricted and illiquid securities
normally reflect a discount, which may be significant, from the market price
of comparable securities for which a liquid market exists.
 
  REPURCHASE AGREEMENTS. Each Fund may enter into repurchase agreements with
dealers in U.S. Government Securities and member banks of the Federal Reserve
System which furnish collateral at least equal in value or market price to the
amount of their repurchase obligation. The Core Fixed Income, Global Income
and High Yield Funds may also enter into repurchase agreements involving
certain foreign government securities. If the other party or "seller"
defaults, a Fund might suffer a loss to the extent that the proceeds from the
sale of the underlying securities and other collateral held by the Fund in
connection with the related repurchase agreement are less than the repurchase
price. In addition, in the event of bankruptcy of the seller or failure of the
seller to repurchase the securities as agreed, a Fund could suffer losses,
including loss of interest on or principal of the security and costs
associated with delay and enforcement of the repurchase agreement. The
 
                                      36
<PAGE>
 
Trustees have reviewed and approved certain counterparties whom they believe
to be creditworthy and have authorized the Funds to enter into repurchase
agreements with such counterparties. In addition, each Fund, together with
other registered investment companies having management agreements with the
Investment Adviser, may transfer uninvested cash balances into a single joint
account, the daily aggregate balance of which will be invested in one or more
repurchase agreements.
 
  TEMPORARY INVESTMENTS. Each Fund may, for temporary defensive purposes,
invest up to 100% of its total assets in (i) U. S. Government Securities or
(ii) repurchase agreements collateralized by U.S. Government Securities. The
Short Duration Tax-Free and Municipal Income Funds may for temporary defensive
purposes depart from their stated investment objectives and invest more than
20% of their respective net assets in taxable investments. The High Yield Fund
may for temporary defensive purposes invest in investment grade securities.
 
MISCELLANEOUS TECHNIQUES
 
  In addition to the techniques and investments described above, each Fund
may, with respect to no more than 5% of its net assets, engage in the
following techniques and investments: (i) portfolio securities lending, (ii)
mortgage swaps (other than Short Duration Tax-Free and Municipal Income
Funds), interest rate swaps, caps, floors and collars and credit swaps, (iii)
inverse floating-rate securities, (iv) yield curve options, (v) other
investment companies, (vi) custodial receipts, (vii) with respect to the Short
Duration Tax-Free and Municipal Income Funds, tender option bonds and standby
commitments and (viii) reverse repurchase agreements for investment purposes.
 
  In addition, each Fund may borrow up to 33 1/3% of its total assets from
banks for temporary or emergency purposes. A Fund may not make additional
investments if borrowings (excluding covered mortgage dollar rolls) exceed 5%
of its total assets. For more information, see the Additional Statement.
 
 
                            INVESTMENT RESTRICTIONS
 
 
  Each Fund is subject to certain investment restrictions that are described
in detail under "Investment Restrictions" in the Additional Statement.
Fundamental investment restrictions of a Fund cannot be changed without
approval of a majority of the outstanding shares of that Fund, as defined in
the Additional Statement. Each Fund's investment objectives and all policies
not specifically designated as fundamental are non-fundamental and may be
changed without shareholder approval. If there is a change in a Fund's
investment objectives, shareholders should consider whether that Fund still
remains an appropriate investment in light of their then current financial
positions and needs.
 
  The Short Duration Tax-Free and Municipal Income Funds' policy to invest,
under normal market conditions, at least 80% of their respective net assets in
Municipal Securities, the interest on which is exempt from regular federal
income tax, is fundamental and may not be changed without shareholder
approval. For more information on a Fund's investment restrictions, an
investor should obtain the Additional Statement.
 
  NON-DIVERSIFIED STATUS. Since the Global Income Fund is "non-diversified"
under the Act, it is subject only to certain federal tax diversification
requirements. Under federal tax laws, the Global Income Fund may, with respect
to 50% of its total assets, invest up to 25% of its total assets in the
securities of any issuer (except that this limitation does not apply to U.S.
Government Securities). With respect to the remaining 50% of the
 
                                      37
<PAGE>
 
Fund's total assets, (1) the Fund may not invest more than 5% of its total
assets in the securities of any one issuer (other than the U.S. government),
and (2) the Fund may not acquire more than 10% of the outstanding voting
securities of any one issuer. These tests apply at the end of each quarter of
its taxable year and are subject to certain conditions and limitations under
the Code. Since the Global Income Fund is not diversified under the Act, it
will be more susceptible to adverse developments affecting any single issuer.
The Adjustable Rate Government, Short Duration Government, Short Duration Tax-
Free, Government Income, Municipal Income, Core Fixed Income and High Yield
Funds are, in addition to these tax diversification requirements, also subject
to the diversification requirements arising out of their diversified status
under the Act.
 
 
                              PORTFOLIO TURNOVER
 
 
  Each Fund may engage in active short-term trading to benefit from yield
disparities among different issues of securities or among the markets for
fixed-income securities, or for other reasons. It is anticipated that the
portfolio turnover rate of each Fund will vary from year to year. The
portfolio turnover rate is computed by dividing the lesser of the dollar
amount of securities purchased or securities sold (excluding all securities
whose maturities at acquisition are one year or less) by the average monthly
value of such securities owned during the year. A 100% turnover rate would
occur, for example, if all of the securities held by a Fund were sold and
replaced within one year. The Investment Adviser will not consider the
portfolio turnover rate a limiting factor in making investment decisions for a
Fund consistent with the Fund's investment objectives and portfolio management
policies. A high rate of portfolio turnover results in increased transaction
costs to a Fund. The portfolio turnover rate includes the effect of entering
into mortgage dollar rolls. See "Financial Highlights" for a statement of each
Fund's historical portfolio turnover rates.
 
 
                                  MANAGEMENT
 
 
TRUSTEES AND OFFICERS
 
  The Trustees are responsible for deciding matters of general policy and
reviewing the actions of the Investment Advisers, distributor and transfer
agent. The officers of the Trust conduct and supervise each Fund's daily
business operations. The Additional Statement contains information as to the
identity of, and other information about, the Trustees and officers of the
Trust.
 
INVESTMENT ADVISERS
 
  INVESTMENT ADVISERS. Goldman Sachs Funds Management, L.P., One New York
Plaza, New York, New York 10004, a Delaware limited partnership which is an
affiliate of Goldman Sachs, serves as investment adviser to the Adjustable
Rate Government and Short Duration Government Funds. Goldman Sachs Funds
Management, L.P. registered as an investment adviser in 1990. Goldman Sachs
Asset Management, One New York Plaza, New York, New York 10004, a separate
operating division of Goldman Sachs, serves as the investment adviser to the
Short Duration Tax-Free, Government Income, Municipal Income, Core Fixed
Income and High Yield Funds. Goldman Sachs registered as an investment adviser
in 1981. Goldman Sachs Asset Management International, 133 Peterborough Court,
London EC4A 2BB, England, an affiliate of Goldman Sachs, serves as investment
adviser to the Global Income Fund. Goldman Sachs Asset Management
International became a member of the
 
                                      38
<PAGE>
 
Investment Management Regulatory Organization Limited in 1990 and registered
as an investment adviser in 1991. The Goldman Sachs Group, L.P., which
controls the Investment Advisers, has announced that it will pursue an initial
public offering of the firm during the fourth quarter of 1998; if the public
offering is consummated, The Goldman Sachs Group, L.P. will merge into the new
public company, which will be called The Goldman Sachs Group, Inc. As of July
24, 1998, GSAM, GSFM and GSAMI, together with their affiliates, acted as
investment adviser or distributor for assets in excess of $168 billion.
 
  Under a Management Agreement with each Fund, the applicable Investment
Adviser, subject to the general supervision of the Trustees, provides day-to-
day advice as to the Fund's portfolio transactions. Goldman Sachs has agreed
to permit the Funds to use the name "Goldman Sachs" or a derivative thereof as
part of each Fund's name for as long as a Fund's Management Agreement is in
effect.
 
  In performing its investment advisory services, each Investment Adviser,
while remaining ultimately responsible for the management of the Funds, is
able to draw upon the research and expertise of its asset management
affiliates for portfolio decisions and management with respect to certain
portfolio securities. In addition, the Investment Advisers will have access to
the research of, and certain proprietary technical models developed by,
Goldman Sachs and may apply quantitative and qualitative analysis in
determining the appropriate allocations among the categories of issuers and
types of securities.
 
  Under the Management Agreement, each Investment Adviser also: (i) supervises
all non-advisory operations of each Fund that it advises; (ii) provides
personnel to perform such executive, administrative and clerical services as
are reasonably necessary to provide effective administration of each Fund;
(iii) arranges for at each Fund's expense (a) the preparation of all required
tax returns, (b) the preparation and submission of reports to existing
shareholders, (c) the periodic updating of prospectuses and Additional
Statements and (d) the preparation of reports to be filed with the SEC and
other regulatory authorities; (iv) maintains each Fund's records; and (v)
provides the Funds with office space and all necessary office equipment and
services.
 
  ADJUSTABLE RATE GOVERNMENT AND SHORT DURATION GOVERNMENT FUNDS. The Funds'
portfolio managers are Jonathan A. Beinner, Richard C. Lucy, James B. Clark,
Peter D. Dion and James P. McCarthy. Their responsibilities include investing
in the particular types of securities the Funds may hold. Mr. Beinner is a
Managing Director of Goldman Sachs and Co-Head of GSAM's U.S. Fixed Income
Department. Mr. Beinner joined the Investment Adviser in 1990. Mr. Lucy is a
Vice President of Goldman Sachs and Co-Head of GSAM's U.S. Fixed Income
Department. Mr. Lucy joined the Investment Adviser in 1992. Mr. Clark joined
GSAM in 1994 after working as a senior trader at the Federal Home Loan
Mortgage Corporation. Prior to that, he was an investment manager at Travelers
Insurance Company. Mr. Dion is a Vice President of Goldman Sachs and joined
GSAM in 1992. Mr. McCarthy is a Vice President of Goldman Sachs. Mr. McCarthy
joined GSAM in 1995 after working as a bond trader at Nomura Securities.
 
  GOVERNMENT INCOME AND CORE FIXED INCOME FUNDS. The Funds' portfolio managers
are Jonathan A. Beinner and Richard C. Lucy. See above for information about
Mr. Beinner and Mr. Lucy. Messrs. Beinner and Lucy each specialize in
investing in a particular type of security the Fund may hold. James Clark is
also a portfolio manager for the Government Income Fund. See above for
information about Mr. Clark.
 
  SHORT DURATION TAX-FREE AND MUNICIPAL INCOME FUNDS. The Funds' portfolio
managers are Benjamin S. Thompson and Elisabeth Schupf Lonsdale. Mr. Thompson
and Ms. Lonsdale each specialize in municipal securities. Mr. Thompson's
responsibilities include developing investment strategy and structuring
portfolios. Ms. Lonsdale is also responsible for GSAM's municipal credit
research. Mr. Thompson worked in the institutional sales and marketing group
at GSAM until he joined the fixed-income team in 1993. Prior to joining GSAM
in early 1992, Mr. Thompson worked in the Structured Finance Group of the
Chase Manhattan Bank.
 
                                      39
<PAGE>
 
Before rejoining Goldman Sachs in 1995, Ms. Lonsdale was a Director of Fitch
Investors Service evaluating the credit ratings of tax-backed issues. Prior to
that, she worked for ten years in the Goldman Sachs Municipal Finance
Department.
 
  GLOBAL INCOME FUND. The Fund's portfolio managers are Stephen Fitzgerald and
Andrew Wilson. Mr. Fitzgerald joined GSAMI in 1992 and is an Executive
Director and Chief Investment Officer for international fixed income. Mr.
Wilson joined GSAMI in 1995 and is Executive Director and Portfolio Manager
for international fixed income. Prior to joining GSAMI, he spent three years
as an Assistant Director at Rothschild Asset Management where he was
responsible for managing global and international bond portfolios, with
specific focus on the U.S., Canadian, Australian and Japanese economies.
 
  HIGH YIELD FUND. The Fund's portfolio managers are Andrew Jessop,
Christopher Testa, Rachel Golder and Michael L. Pasternak. Mr. Jessop is a
Vice President of Goldman Sachs and is responsible for managing high yield
assets. Mr. Jessop joined GSAM in 1997. Prior to joining GSAM, Mr. Jessop
spent six years managing high yield portfolios at Saudi International Bank in
London. Prior to that, he worked for the bank on the interest rate swap desk
and served as an investment analyst in New York. Mr. Testa is a Vice President
of Goldman Sachs and Director of Credit Research responsible for corporate
bond research. Mr. Testa is responsible for managing high yield assets. Mr.
Testa joined GSAM in 1994. Prior to joining GSAM, Mr. Testa was a credit
analyst with CS First Boston and prior to that he was an analyst for
Metropolitan Life Insurance Company investing in private placements and public
debt. Ms. Golder is a Vice President of Goldman Sachs and is responsible for
managing high yield assets. Ms. Golder joined GSAM in 1997. Prior to joining
GSAM, Ms. Golder spent six years at Saudi International Bank as a high yield
credit analyst and portfolio manager. Prior to that, Ms. Golder was with
Kleinwort Benson Ltd., where she managed investments in corporate loans. Mr.
Pasternak is a Vice President of Goldman Sachs and is the product manager for
high yield assets. Mr. Pasternak also contributes to the management of high
yield assets. Mr. Pasternak joined GSAM in 1997. Prior to joining GSAM, Mr.
Pasternak spent eight years managing high yield corporate bond and loan
portfolios at Saudi International Bank (an affiliate of JP Morgan) in London.
Prior to that, he was an officer of the bank in Eurocurrency Lending and
Syndications and served as an investment analyst in New York.
 
  It is the responsibility of the Investment Adviser to make the investment
decisions for a Fund and to place the purchase and sale orders for a Fund's
portfolio transactions in U.S. and foreign markets. Such orders may be
directed to any broker including, to the extent and in the manner permitted by
applicable law, Goldman Sachs or its affiliates. In effecting purchases and
sales of portfolio securities for the Funds, the Investment Advisers will seek
the best price and execution of a Fund's orders. In doing so, where two or
more brokers or dealers offer comparable prices and execution for a particular
trade, consideration may be given to whether the broker or dealer provides
investment research or brokerage services or sells shares of any Goldman Sachs
Fund. See the Additional Statement for a further description of the Investment
Advisers' brokerage allocation practices.
 
 
                                      40
<PAGE>
 
  As compensation for its services rendered and assumption of certain expenses
pursuant to separate Management Agreements, GSAM, GSFM and GSAMI are entitled
to the following fees, computed daily and payable monthly at the annual rates
listed below:
<TABLE>
<CAPTION>
                                            FOR THE FISCAL
                             CONTRACTUAL YEAR OR PERIOD ENDED       AS OF
                                RATE*     OCTOBER 31,  1997*  SEPTEMBER 1, 1998
                             ----------- -------------------- -----------------
<S>                          <C>         <C>                  <C>
GSAM
- ----
  Short Duration Tax-Free...    0.40%           0.40%               0.35%
  Government Income.........    0.65%           0.25%               0.54%
  Municipal Income..........    0.55%           0.55%               0.50%
  Core Fixed Income.........    0.40%           0.40%               0.40%
  High Yield................    0.70%           0.65%               0.70%
GSFM
- ----
  Adjustable Rate
   Government...............    0.40%           0.40%               0.40%
  Short Duration
   Government...............    0.50%           0.40%               0.50%
GSAMI
- -----
  Global Income.............    0.90%           0.59%               0.65%
</TABLE>
- --------
*  The difference, if any, between the stated fees and the actual fees paid by
   the Funds reflects that the applicable Investment Adviser did not charge
   the full amount of the fees to which it would have been entitled for the
   year ended October 31, 1997. The Investment Adviser may discontinue or
   modify any limitations in the future at its discretion.
 
  The Investment Adviser has voluntarily agreed to reduce or limit certain
"Other Expenses" of the Funds (excluding management fees, service fees,
transfer agency fees, taxes, interest and brokerage fees and litigation,
indemnification and other extraordinary expenses) to the extent such expenses
exceed 0.05%, 0.00%, 0.00%, 0.00%, 0.00%, 0.10%, 0.00% and 0.02% per annum of
the average daily net assets of the Adjustable Rate Government, Short Duration
Government, Short Duration Tax-Free, Government Income, Municipal Income, Core
Fixed Income, Global Income and High Yield Funds', respectively. Such
reductions or limits, if any, may be discontinued or modified by the
applicable Investment Adviser in its discretion at any time.
 
  ACTIVITIES OF GOLDMAN SACHS AND ITS AFFILIATES AND OTHER ACCOUNTS MANAGED BY
GOLDMAN SACHS. The involvement of the Investment Advisers, Goldman Sachs and
their affiliates in the management of, or their interest in, other accounts
and other activities of Goldman Sachs may present conflicts of interest with
respect to a Fund or limit a Fund's investment activities. Goldman Sachs and
its affiliates engage in proprietary trading and advise accounts and funds
which have investment objectives similar to those of the Funds and/or which
engage in and compete for transactions in the same types of securities,
currencies and instruments as the Funds. Goldman Sachs and its affiliates will
not have any obligation to make available any information regarding their
proprietary activities or strategies, or the activities or strategies used for
other accounts managed by them, for the benefit of the management of the
Funds. The results of a Fund's investment activities, therefore, may differ
from those of Goldman Sachs and its affiliates and it is possible that a Fund
could sustain losses during periods in which Goldman Sachs and its affiliates
and other accounts achieve significant profits on their trading for
proprietary or other accounts. In addition, the Funds may, from time to time,
enter into transactions in which other clients of Goldman Sachs have an
adverse interest. From time to time, a Fund's activities may be limited
because of
 
                                      41
<PAGE>
 
regulatory restrictions applicable to Goldman Sachs and its affiliates, and/or
their internal policies designed to comply with such restrictions. See
"Management -- Activities of Goldman Sachs and its Affiliates and Other
Accounts Managed by Goldman Sachs" in the Additional Statement for further
information.
 
DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs, 85 Broad Street, New York, New York 10004, serves as the
exclusive distributor (the "Distributor") of each Fund's shares. Goldman
Sachs, 4900 Sears Tower, Chicago, Illinois 60606, also serves as each Fund's
transfer agent (the "Transfer Agent") and as such performs various shareholder
servicing functions. Shareholders with inquiries regarding any Fund should
contact Goldman Sachs (as Transfer Agent) at the address or the telephone
number set forth on the back cover page of this Prospectus. Goldman Sachs is
entitled to receive a transfer agency fee with respect to each Fund's
Institutional and Service shares equal, on an annual basis, to 0.04% of
average daily net assets.
 
  From time to time, Goldman Sachs or any of its affiliates may purchase and
hold shares of the Funds. Goldman Sachs reserves the right to redeem at any
time some or all of the shares acquired for its own account.
 
YEAR 2000
 
  Many computer systems were designed using only two digits to signify the
year (for example, "98" for "1998"). On January 1, 2000, if these computer
systems are not corrected, they may incorrectly interpret "00" as the year
"1900" rather than the year "2000," leading to computer shutdowns or errors
(commonly known as the "Year 2000 Problem"). To the extent these systems
conduct forward-looking calculations, these computer problems may occur prior
to January 1, 2000. Like other investment companies and financial and business
organizations, the Funds could be adversely affected in their ability to
process securities trades, price securities, provide shareholder account
services and otherwise conduct normal business operations if the computer
systems used by the Investment Adviser or other Fund service providers do not
adequately address this problem in a timely manner. The Investment Adviser has
established a dedicated group to analyze these issues and to implement the
systems modifications necessary to prepare for the Year 2000 Problem.
Currently, the Investment Adviser does not anticipate that the transition to
the 21st century will have any material impact on its ability to continue to
service the Funds at current levels. In addition, the Investment Adviser has
sought assurances from the Funds' other service providers that they are taking
the steps necessary so that they do not experience Year 2000 Problems, and the
Investment Adviser will continue to monitor the situation. At this time,
however, no assurance can be given that the actions taken by the Investment
Adviser and the Funds' other service providers will be sufficient to avoid any
adverse effect on the Funds due to the Year 2000 Problem.
 
 
                                   DIVIDENDS
 
 
  Each Fund (other than the Global Income Fund) will declare a daily dividend
which will be paid monthly. The Global Income Fund will declare and pay
dividends monthly. Over the course of the fiscal year, dividends accrued and
paid will constitute all or substantially all of the Funds' net investment
income. From time to time a portion of such dividends may constitute a return
of capital. In the case of Core Fixed Income, Global Income and High Yield
Funds, net loss, if any, from certain foreign currency transactions or
instruments that is otherwise taken into account in calculating net investment
income or net realized capital gains for accounting purposes may not be taken
into account in determining the amount of dividends to be declared and paid,
with the result
 
                                      42
<PAGE>
 
that a portion of the Fund's dividends may be treated as a return of capital,
nontaxable to the extent of a shareholder's tax basis in his shares. The Funds
also intend that all net realized capital gains will be declared as a dividend
at least annually. In determining amounts of capital gains to be distributed,
capital losses, including any available capital loss carryovers from prior
years will be offset against capital gains.
 
  A Fund's net investment income is determined on a daily basis (monthly in
the case of the Global Income Fund). On days on which net asset value is
calculated, such determination is made immediately prior to the calculation of
a Fund's net asset value. On days on which net asset value is not calculated,
such determination is made as of 3:00 p.m. Chicago time.
 
  Payment of dividends (other than the Global Income Fund) from net investment
income will be made on the last calendar day of each month in additional
shares of a Fund at the net asset value on such day, unless cash distributions
are elected, in which case, cash payment will be made on the first Business
Day of the succeeding month. In the case of Global Income Fund, reinvestment
of dividends from net investment income in additional shares of the Fund will
be made on the second to last Business Day of each month. Cash dividends will
be paid on or about the last Business Day of the month. Payment of dividends
with respect to capital gains, if any, when declared will be made in
additional shares of the Fund at the net asset value on the payment date,
unless cash distributions are elected. This election to receive dividends in
cash is initially made on the Account Information Form and may be changed upon
written notice to the Transfer Agent at any time prior to the record date for
a particular dividend or distribution. If cash dividends are elected with
respect to the Fund's monthly net investment income dividends, then cash
dividends must also be elected with respect to the non-long-term capital gains
component, if any, of the Fund's annual dividend.
 
  At the time of an investor's purchase of shares of a Fund, a portion of the
net asset value per share may be represented by undistributed income (in the
case of the Global Income Fund) or realized or unrealized appreciation of any
Fund's portfolio securities. Therefore, subsequent distributions on such
shares from such income or realized appreciation may be taxable to the
investor even if the net asset value of the shares is, as a result of the
distributions, reduced below the cost of such shares and the distributions (or
portions thereof) represent a return of a portion of the purchase price.
 
 
                                   EXPENSES
 
 
  The Funds are responsible for the payment of their expenses. The expenses
include, without limitation; fees payable to the Investment Adviser; service
fees paid to Service Organizations; custodial and transfer agency fees;
brokerage fees and commissions; filing fees for the registration or
qualification of the Funds' shares under federal or state securities laws,
organizational expenses; fees and expenses incurred in connection with
membership in investment company organizations; taxes; interest; costs of
liability insurance, fidelity bonds or indemnification; any costs, expenses or
losses arising out of any liability of, or claim for damages or other relief
asserted against, the Funds for violation of any law; legal and auditing fees
and expenses (including the cost of legal and certain accounting services
rendered by employees of the Investment Adviser and its affiliates with
respect to the Funds); expenses of preparing and setting in type prospectuses,
Additional Statements, proxy material, reports and notices and the printing
and distributing of the same to shareholders and regulatory authorities;
compensation and expenses of the Trust's "non-interested" Trustees; and
extraordinary expenses, if any, incurred by the Trust.
 
                                      43
<PAGE>
 
 
                                NET ASSET VALUE
 
 
  The net asset value per share of each class of a Fund is calculated by the
Fund's custodian as of the close of regular trading on the New York Stock
Exchange (normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m. New York
time) on each Business Day (as such term is defined under "Additional
Information") immediately after the determination, if any, of the income to be
declared as a dividend (except in the case of the Global Income Fund). Net
asset value per share of each class is calculated by determining the net
assets of each class and dividing by the number of outstanding shares of that
class.
 
  Each Fund's portfolio securities for which accurate market quotations are
readily available are valued on the basis of quotations, which may be
furnished by a pricing service or provided by dealers in such securities and
other portfolio securities are valued at fair value, based on yield
equivalents, a pricing matrix or other sources, under valuation procedures
established by the Trustees. Debt obligations with a remaining maturity of 60
days or less are valued at amortized cost. The Board of Trustees has
determined that the amortized cost of such securities approximates fair market
value.
 
 
                            PERFORMANCE INFORMATION
 
 
  From time to time each Fund may publish yield, distribution rate and average
annual total return and the Short Duration Tax-Free and Municipal Income Funds
may publish their tax equivalent yields in advertisements and communications
to shareholders or prospective investors. Average annual total return is
determined by computing the average annual percentage change in value of
$1,000 invested at the maximum public offering price for specified periods
ending with the most recent calendar quarter, assuming reinvestment of all
dividends and distributions at net asset value. The total return calculation
assumes a complete redemption of the investment at the end of the relevant
period. Each Fund may also from time to time advertise total return on a
cumulative, average, year-by-year or other basis for various specified periods
by means of quotations, charts, graphs or schedules. In addition to the above,
each Fund may from time to time advertise its performance relative to certain
averages, performance rankings, indices, other information prepared by
recognized mutual fund statistical services and investments for which reliable
performance information is available.
 
  Yield is computed by dividing net investment income earned during a recent
thirty-day period by the product of the average daily number of shares
outstanding and entitled to receive dividends during the period and the
maximum offering price per share on the last day of the relevant period. The
results are compounded on a bond equivalent (semiannual) basis and then
annualized. Net investment income per share is equal to the dividends and
interest earned during the period, reduced by accrued expenses for the period.
The calculation of net investment income for these purposes may differ from
the net investment income determined for accounting purposes.
 
  Tax equivalent yield represents the yield an investor would have to earn to
equal, after taxes, the Short Duration Tax-Free and Municipal Income Funds'
tax-free yield. Tax equivalent yield is calculated by dividing a Fund's tax-
exempt yield by one minus a stated federal tax rate.
 
  Quotations of distribution rates are calculated by annualizing the most
recent distribution of net investment income for a monthly, quarterly or other
relevant period and dividing this amount by the net asset value per share or
maximum public offering price on the last day of the period for which the
distribution rates are being calculated.
 
 
                                      44
<PAGE>
 
  Each Fund's yield, total return and distribution rate will be calculated
separately for each class of shares in existence. Because each class of shares
may be subject to different expenses, the yield, total return and distribution
rate calculations with respect to each class of shares for the same period
will differ. See "Shares of the Trust."
 
  Each Fund's performance quotations do not reflect any fees charged by a
Service Organization to its customer accounts in connection with investments
in the Funds. The investment results of a Fund will fluctuate over time and
any presentation of investment results for any prior period should not be
considered a representation of what an investment may earn or what the Fund's
performance may be in any future period. In addition to information provided
in shareholder reports, the Funds may, in their discretion, from time to time,
make a list of their holdings available to investors upon request.
 
 
                              SHARES OF THE TRUST
 
 
  Each Fund is a series of the Goldman Sachs Trust, which was formed under the
laws of the State of Delaware on January 28, 1997. The Funds were formerly
series of Goldman Sachs Trust, a Massachusetts business trust, and were
reorganized into the Trust as of April 30, 1997. The Trustees have authority
under the Trust's Declaration of Trust to create and classify shares of
beneficial interest in separate series, without further action by
shareholders. Additional series may be added in the future. The Trustees also
have authority to classify or reclassify any series or portfolio of shares
into one or more classes.
 
  When issued, shares are fully paid and non-assessable. In the event of
liquidation, shareholders are entitled to share pro rata in the net assets of
the applicable Fund available for distribution to such shareholders. All
shares are freely transferable and have no preemptive, subscription or
conversion rights. Shareholders are entitled to one vote per share, provided
that at the option of the Trustees, shareholders will be entitled to a number
of votes based upon the net asset values represented by their shares.
 
  The Trust does not intend to hold annual meetings of shareholders. However,
recordholders may, under certain circumstances, as permitted by the Act,
communicate with other shareholders in connection with requiring a special
meeting of shareholders. The Trustees will call a special meeting of
shareholders for the purpose of electing Trustees, if, at any time, less than
a majority of Trustees holding office at the time were elected by
shareholders.
 
  In the interest of economy and convenience, the Trust does not issue
certificates representing the Funds' shares. Instead, the Transfer Agent
maintains a record of each shareholder's ownership. Each shareholder receives
confirmation of purchase and redemption orders from the Transfer Agent. Fund
shares and any dividends and distributions paid by the Funds are reflected in
account statements from the Transfer Agent.
 
  As of February 1, 1998, the shareholders listed below owned beneficially and
of record 25% or more of the outstanding shares of the following Funds: Short
Duration Government Fund--State Street Bank and Trust Company, P.O. Box 1992,
Boston, MA 02105-1992 (29.64%); Core Fixed Income Fund--Vinson and Elkins
Lawyers, Retirement Plan, Texas Commerce Bank N.A., P.O. Box 2550, Houston, TX
77252-2558 (25.48%).
 
                                      45
<PAGE>
 
 
                                   TAXATION
 
 
FEDERAL TAXES
 
  Each Fund is treated as a separate entity for tax purposes, has elected to
be treated as a regulated investment company and intends to qualify for such
treatment for each taxable year under Subchapter M of the Code. To qualify as
such, a Fund must satisfy certain requirements relating to the sources of its
income, diversification of its assets and distribution of its income to
shareholders. As a regulated investment company, a Fund will not be subject to
federal income or excise tax on any net investment income and net realized
capital gains that are distributed to its shareholders in accordance with
certain timing requirements of the Code.
 
  The Short Duration Tax-Free and Municipal Income Funds intend to satisfy
certain requirements of the Code so that they may distribute the tax-exempt
interest they receive as "exempt-interest dividends," as defined in the Code.
If such requirements are satisfied, distributions of the Short Duration Tax-
Free and Municipal Income Funds that are attributable to interest on tax-
exempt obligations and that the Funds properly designate as exempt-interest
dividends will be exempt from regular federal income tax, although all or a
portion of these distributions may be subject to the federal alternative
minimum tax and may be includable in the tax base for determining taxability
of social security or railroad retirement benefits. Persons who are
"substantial users" (or related persons to such substantial users) of
facilities financed by industrial development or certain private activity
bonds should consult their own tax advisers before purchasing shares of the
Short Duration Tax-Free and Municipal Income Funds. Interest on indebtedness
incurred or continued to purchase or carry shares of the Short Duration Tax-
Free and Municipal Income Funds is not deductible to the extent attributable
to the Funds' distributions that are exempt-interest dividends.
 
  Dividends paid by a Fund from net investment income, certain net realized
foreign exchange gains, the excess of net short-term capital gain over net
long-term capital loss and original issue discount or market discount income
will be taxable to shareholders as ordinary income, except for any exempt-
interest dividends paid by Short Duration Tax-Free and Municipal Income Funds,
as described above. Distributions out of the net capital gain (the excess of
net long-term capital gain over net short-term capital loss), if any, of a
Fund, will be taxed to shareholders as long-term capital gains, regardless of
the length of time a shareholder has held his or her shares or whether such
gain was reflected in the price paid for the shares. These tax consequences
will apply whether distributions are received in cash or reinvested in shares.
Certain distributions paid by a Fund in January of a given year may be taxable
to shareholders as if received the prior December 31. Shareholders will be
informed annually about the amount and character of distributions received
from the Funds for federal income tax purposes.
 
  Investors should consider the tax implications of buying shares immediately
prior to a distribution. Investors who purchase shares shortly before the
record date for a distribution other than a daily dividend will pay a per
share price that includes the value of the anticipated distribution and will
be taxed on any taxable distribution even though the distribution represents a
return of a portion of the purchase price.
 
  Redemptions and exchanges of shares are taxable events.
 
  Individuals and certain other classes of shareholders may be subject to 31%
backup withholding of federal income tax on distributions (other than exempt-
interest dividends), redemptions and exchanges if they fail to furnish their
correct taxpayer identification number and certain certifications required by
the Internal Revenue
 
                                      46
<PAGE>
 
Service or if they are otherwise subject to backup withholding. Individuals,
corporations and other shareholders that are not U.S. persons under the Code
are subject to different tax rules and may be subject to nonresident alien
withholding at the rate of 30% (or a lower rate provided by an applicable tax
treaty) on amounts treated as ordinary dividends from the Funds.
 
  The Core Fixed Income, Global Income and High Yield Funds may be subject to
foreign withholding or other foreign taxes on income or gain from certain
foreign securities. In general, a Fund may deduct these taxes in computing its
taxable income, if any. As an alternative, if more than 50% of the value of
the total assets of the Global Income Fund is comprised of securities of
foreign corporations at the end of its taxable year and the Fund so elects,
the Fund's shareholders will include in their gross incomes (in addition to
dividends and distributions they receive) their pro rata shares of qualified
foreign taxes paid by the Fund and may be entitled under the Code to claim
foreign tax credits or deductions with respect to such taxes.
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local
or foreign taxes on payments received from the Funds, including exempt-
interest dividends. A state income (and possibly local income and/or
intangible property) tax exemption is generally available to the extent (if
any) a Fund's distributions are derived from interest on (or, in the case of
intangible property taxes, the value of its assets is attributable to) certain
U.S. government obligations and/or tax-exempt municipal obligations issued by
or on behalf of the particular state or a political subdivision thereof,
provided in some states that certain thresholds for holdings of such
obligations and/or reporting requirements are satisfied. For a further
discussion of certain tax consequences of investing in shares of the Funds,
see "Taxation" in the Additional Statement. Shareholders are urged to consult
their own tax advisers regarding specific questions as to federal, state and
local taxes as well as to any foreign taxes.
 
 
                            ADDITIONAL INFORMATION
 
 
  As used in this Prospectus, the term "Business Day" means any day the New
York Stock Exchange is open for trading, which is Monday through Friday except
for holidays. The New York Stock Exchange is closed
on the following holidays: New Year's Day, Martin Luther King, Jr. Day,
Presidents' Day (observed), Good Friday, Memorial Day (observed), Independence
Day, Labor Day, Thanksgiving Day and Christmas Day.
 
                                      47
<PAGE>
 
 
                            REPORTS TO SHAREHOLDERS
 
 
  Recordholders of Institutional Shares of the Funds will receive an annual
report containing audited financial statements and a semiannual report. To
eliminate unnecessary duplication, only one copy of such reports may be sent
to recordholders with the same mailing address. Recordholders who desire a
duplicate copy of such reports to be mailed to their residence should contact
Goldman Sachs at 800-621-2550. Each recordholder of Institutional Shares will
also be provided with a printed confirmation for each transaction in its
account and an individual monthly statement (quarterly in the case of Global
Income Fund). A year-to-date statement for any account will be provided upon
request made to Goldman Sachs. The Funds do not generally provide
subaccounting services with respect to beneficial ownership of Institutional
Shares.
 
 
                       PURCHASE OF INSTITUTIONAL SHARES
 
 
  Institutional Shares may be purchased on any Business Day at the net asset
value per share next determined after receipt of an order. No sales load will
be charged. Currently, net asset value is determined as of the close of
regular trading on the New York Stock Exchange (normally, but not always, 3:00
p.m. Chicago time, 4:00 p.m. New York time), as described under "Net Asset
Value." Purchases of Institutional Shares of the Funds must be settled within
three (3) Business Days of receipt of a complete purchase order. Payment of
the proceeds of redemption of shares purchased by check may be delayed for a
period of time as described under "Redemption of Institutional Shares."
 
  Prior to making an initial investment in a Fund, an investor must open an
account with a Fund by furnishing necessary information to such Fund or
Goldman Sachs. An Account Information Form, a copy of which is attached to
this Prospectus, should be used to open such an account. Subsequent purchases
may be made in the manner set forth below.
 
PURCHASE PROCEDURES APPLICABLE TO EACH FUND OTHER THAN THE GLOBAL INCOME FUND
 
  Purchases of Institutional Shares may be made by qualified investors by
placing an order with Goldman Sachs at 800-621-2550 and either wiring federal
funds to The Northern Trust Company ("Northern") as subcustodian for State
Street Bank and Trust Company ("State Street") on the next Business Day or
initiating an ACH transfer to ensure receipt by Northern on the next Business
Day. Purchases may also be made by check
(except that the Trust will not accept a check drawn on a foreign bank or a
third-party check) or Federal Reserve draft payable to Goldman Sachs Fixed
Income Funds--Name of Fund and Class of shares and should be directed to
Goldman Sachs Fixed Income Funds--Name of Fund and Class of shares, c/o GSAM
Shareholder Services, 4900 Sears Tower, Chicago, Illinois 60606.
 
                                      48
<PAGE>
 
PURCHASE PROCEDURES APPLICABLE TO THE GLOBAL INCOME FUND
 
  Purchases of Institutional Shares may be made by qualified investors by
placing an order with Goldman Sachs at 800-621-2550 and either wiring federal
funds to State Street or initiating an ACH transfer. Purchases may also be
made by check (except that the Trust will not accept a check drawn on a
foreign bank or a third-party check) or Federal Reserve draft made payable to
Goldman Sachs Fixed Income Funds-- Name of Fund and Class of shares and should
be directed to Goldman Sachs Fixed Income Funds--Name of Fund and Class of
shares c/o National Financial Data Services, Inc., P.O. Box 419711, Kansas
City, MO 64141-6711.
 
MINIMUM INITIAL INVESTMENTS
 
  In the case of each Fund other than the Government Income, Municipal Income,
Global Income and High Yield Funds, the minimum initial investment is $50,000
in Institutional Shares of a Fund alone or in combination with Institutional
Shares of any other mutual fund sponsored by Goldman Sachs and designated as
an eligible fund for this purpose and the corresponding class of any portfolio
of the Goldman Sachs Money Market Funds.
 
  Institutional Shares of the Government Income, Municipal Income, Global
Income and High Yield Funds may be offered to (a) banks, trust companies or
other types of depository institutions investing for their own account or on
behalf of their clients; (b) pension and profit sharing plans, pension funds
and other company-sponsored benefit plans; (c) any state, county, city or any
instrumentality, department, authority or agency thereof; (d) corporations and
other for-profit business organizations with assets of at least $100 million
or publicly traded securities outstanding; (e) "wrap" accounts for the benefit
of clients of broker-dealers, financial institutions or financial planners,
provided that they have entered into an agreement with GSAM specifying
aggregate minimums and certain operating policies and standards; and (f)
registered investment advisers investing for accounts for which they receive
asset-based fees. With respect to these investors, the minimum initial
investment is $1,000,000 in Institutional Shares of a Fund alone or in
combination with other assets under the management of GSAM and its affiliates.
 
  The minimum initial investment in Institutional Shares for (a) individual
investors; (b) qualified non-profit organizations, charitable trusts,
foundations and endowments; and (c) accounts over which GSAM or its advisory
affiliates have investment discretion is $10,000,000. The minimum investment
requirement may be waived at the discretion of the Trust's officers. No
minimum amount is required for subsequent investments.
 
  The minimum investment requirement may be waived for current and former
officers, partners, directors or employees of Goldman Sachs or any of its
affiliates or for other investors at the discretion of the Trust's officers.
 
OTHER PURCHASE INFORMATION
 
  The Trust may authorize certain institutions (including banks, trust
companies, brokers and investment advisers) that provide recordkeeping,
reporting and processing services to their customers to accept on the Trust's
behalf orders placed by or on behalf of such customers and, if approved by the
Trust, to designate other intermediaries to accept such orders. In these
cases, a Fund will be deemed to have received an order in proper form by or on
behalf of a customer when the order is accepted by the authorized institution
or intermediary on a Business Day, and the order will be priced at a Fund's
net asset value per share next determined after such acceptance. The
institution or intermediary will be responsible for transmitting accepted
orders to the Trust within the period agreed upon by them. A customer should
contact an institution to learn whether it is authorized to accept orders for
the Trust. Such institutions may receive payments from the Funds or Goldman
Sachs for the services provided by them with respect to the Funds'
Institutional Shares. These payments may be in addition to other servicing
and/or subtransfer agency payments borne by the Funds and their share classes.
 
                                      49
<PAGE>
 
  Institutional Shares of the Global Income Fund will be issued and dividends
will begin to be paid with respect to dividends which accrue on or after the
purchase of Institutional Shares. For the other Funds, the following applies:
 
    PURCHASE BY FEDERAL FUNDS WIRE OR ACH TRANSFER. If a purchase order is
  received with a specified settlement date in proper form before the
  determination of net asset value that day and payment is made by wire
  transfer or ACH transfer, shares will be issued and dividends will begin to
  accrue on the purchased shares on the later of (i) the Business Day after
  receipt of the purchase order or (ii) the day of receipt of a federal funds
  wire or an ACH transfer by State Street. For purchases without a specified
  settlement date, shares will be issued and dividends declared with respect
  to such shares will begin to accrue on the Business Day after payment is so
  received.
 
    PURCHASE BY CHECK OR FEDERAL RESERVE DRAFT. If a purchase order is
  received with a specified settlement date in proper form before the
  determination of net asset value that day and payment is made by check or
  Federal Reserve draft, shares will be issued and dividends will begin to
  accrue on the purchased shares on the Business Day after the date payment
  is received. For purchases without a specified settlement date, shares will
  be issued and dividends declared with respect to such shares will begin to
  accrue on the Business Day after payment is so received.
 
  Banks, trust companies or other institutions through which investors acquire
Institutional Shares may impose charges in connection with transactions in
Institutional Shares. Such institutions should be consulted for information
regarding such charges.
 
  The Investment Adviser, Distributor, and/or their affiliates also pay
additional compensation, from time to time, out of their assets and not as an
additional charge to the Funds, to selected institutions (including banks,
trust companies, brokers and investment advisers) and other persons in
connection with the sale and/or servicing of shares of the Funds and other
investment portfolios of the Trust (such as additional payments based on new
sales, amounts exceeding pre-established thresholds, or the length of time
clients' assets have remained in the Trust), and subject to applicable NASD
regulations, contribute to various non-cash and cash incentive arrangements to
promote the sale of shares, as well as sponsor various educational programs,
sales contests and/or promotions in which participants may receive
reimbursement of expenses, entertainment and prizes such as travel awards,
merchandise, cash, investment research and educational information and related
support materials. This additional compensation may vary among institutions
depending upon such factors as the amounts their clients have invested (or may
invest) in particular portfolios of the Trust, the particular program
involved, or the amount of reimbursable expenses. Additional compensation
based on sales may, but is currently not expected to, exceed 0.50%
(annualized) of the amount invested. For further information, see the
Additional Statement.
 
  The Funds reserve the right to redeem the Institutional Shares of any
shareholder of record whose account balance is less than $50 as a result of
earlier redemptions. Such redemptions will not be implemented if the value of
a recordholder's account falls below the minimum account balance solely as a
result of market conditions. A Fund will give sixty (60) days' prior written
notice to recordholders whose Institutional Shares are being redeemed to allow
them to purchase sufficient additional Institutional Shares of a Fund to avoid
such redemption.
 
  The Funds and Goldman Sachs each reserves the right to reject any specific
purchase order (including exchanges) or to restrict purchases or exchanges by
a particular purchaser (or group of related purchasers). This may occur, for
example, when a purchaser or group of purchasers' pattern of frequent
purchases, sales or exchanges of Institutional Shares of a Fund is evident, or
if purchases, sales or exchanges are, or a subsequent abrupt redemption might
be, of a size that would disrupt management of a Fund.
 
 
                                      50
<PAGE>
 
  In the sole discretion of Goldman Sachs, a Fund may accept securities
instead of cash for the purchase of shares of the Fund. Such purchases will be
permitted only if the Investment Adviser determines that any securities
acquired in this manner are consistent with the Fund's investment objectives,
restrictions and policies and are desirable investments for the Fund.
 
 
                              EXCHANGE PRIVILEGE
 
 
  Institutional Shares of a Fund may be exchanged for (i) Institutional Shares
of any other mutual fund sponsored by Goldman Sachs and designated as an
eligible fund for this purpose and (ii) the corresponding class of any Goldman
Sachs Money Market Fund at the net asset value next determined either by
writing to Goldman Sachs, Attention: Goldman Sachs Fixed Income Funds--Name of
Fund and Class of shares, c/o GSAM Shareholders Services, 4900 Sears Tower,
Chicago, Illinois 60606 or, if previously elected in the Fund's Account
Information Form, by telephone at 800-621-2550 (7:00 a.m. to 5:30 p.m. Chicago
time). A shareholder should obtain and read the prospectus relating to any
other fund and its shares and consider its investment objective, policies and
applicable fees before making an exchange. Under the telephone exchange
privilege, Institutional Shares may be exchanged among accounts with different
names, addresses and social security or other taxpayer identification numbers
only if the exchange instructions are in writing and received in accordance
with the procedures set forth under "Redemption of Institutional Shares."
 
  In an effort to prevent unauthorized or fraudulent exchanges by telephone,
Goldman Sachs employs reasonable procedures as set forth under "Redemption of
Institutional Shares" to confirm that such instructions are genuine. In times
of drastic economic or market changes, the telephone exchange privilege may be
difficult to implement. For federal income tax purposes, an exchange is
treated as a redemption of the Institutional Shares surrendered in the
exchange, on which an investor may be subject to tax, followed by a purchase
of Institutional Shares, or the corresponding class of any Goldman Sachs Money
Market Funds received in the exchange. Shareholders should consult their own
tax advisers concerning the tax consequences of an exchange.
 
  Each exchange which represents an initial investment in a Fund must satisfy
the minimum investment requirements of the fund into which the Institutional
Shares are being exchanged, except that this requirement may be waived at the
discretion of the officers of the Trust. Exchanges are available only in
states where exchanges may legally be made. The exchange privilege may be
materially modified or withdrawn at any time on sixty (60) days' written
notice to Institutional Shareholders and is subject to certain limitations.
See "Purchase of Institutional Shares."
 
 
                      REDEMPTION OF INSTITUTIONAL SHARES
 
 
  The Funds will redeem their Institutional Shares upon request of a
recordholder of such Shares on any Business Day at the net asset value next
determined after receipt of a request in proper form by Goldman Sachs from the
recordholder. (See "Purchase of Institutional Shares--Other Purchase
Information" for a description of limited situations where an institution or
other intermediary may be authorized to accept redemptions for the Funds.) If
Institutional Shares to be redeemed were recently purchased by check, a Fund
may delay transmittal of redemption proceeds until such time as it has assured
itself that good funds have been collected for the purchase of such
Institutional Shares. This may take up to fifteen (15) days. Redemption
requests may be made by a shareholder of record by writing to or calling the
Transfer Agent at the address or telephone number set forth on the back cover
page of this Prospectus. A shareholder of record may request redemptions by
telephone
 
                                      51
<PAGE>
 
if the optional telephone redemption privilege is elected on the Account
Information Form accompanying this Prospectus. It may be difficult to
implement redemptions by telephone in times of drastic economic or market
changes.
 
  In an effort to prevent unauthorized or fraudulent redemption or exchange
requests by telephone, Goldman Sachs employs reasonable procedures specified
by the Trust to confirm that such instructions are genuine. Among other
things, any redemption request that requires money to go to an account or
address other than that designated on the Account Information Form must be in
writing and signed by an authorized person designated on the Account
Information Form. Any such written request is also confirmed by telephone with
both the requesting party and the designated bank account to verify
instructions. Exchanges among accounts with different names, addresses and
social security or other taxpayer identification numbers must be in writing
and signed by an authorized person designated on the Account Information Form.
Other procedures may be implemented from time to time concerning telephone
redemptions and exchanges. If reasonable procedures are not implemented, the
Trust may be liable for any loss due to unauthorized or fraudulent
transactions. In all other cases, neither the Funds, the Trust nor Goldman
Sachs will be responsible for the authenticity of redemption or exchange
instructions received by telephone.
 
  Written requests for redemptions must be signed by each recordholder whose
signature has been guaranteed by a bank, a securities broker or dealer, a
credit union having authority to issue signature guarantees, a savings and
loan association, a building and loan association, a cooperative bank, a
federal savings bank or association, a national securities exchange, a
registered securities association or a clearing agency, provided that such
institution satisfies the standards established by the Transfer Agent.
Institutional Shares of each Fund (other than Global Income Fund) earn
dividends declared on the day the shares are redeemed.
 
  The Fund will arrange for the proceeds of redemptions effected by any means
to be wired as federal funds to the bank account designated in the
recordholder's Account Information Form or, if the recordholder elects in
writing, by check. Redemption proceeds paid by wire transfer will normally be
wired on the next Business Day in federal funds (for a total one-day delay),
but may be paid up to three (3) Business Days after receipt of a properly
executed redemption request. Wiring of redemption proceeds may be delayed one
additional Business Day if the Federal Reserve Bank is closed on the day
redemption proceeds would ordinarily be wired. Redemption proceeds paid by
check will normally be mailed to the address of record within three (3)
Business Days of receipt of a properly executed redemption request. In order
to change the bank designated on the Account Information Form to receive
redemption proceeds, a written request must be received by the Transfer Agent.
This request must be signature guaranteed as set forth above. Further
documentation may be required for executors, trustees or corporations. Once
wire transfer instructions have been given by Goldman Sachs, neither the
Funds, the Trust nor Goldman Sachs assumes any further responsibility for the
performance of intermediaries or the recordholder's bank in the transfer
process. If a problem with such performance arises, the recordholder should
deal directly with such intermediaries or bank.
 
  Additional documentation regarding a redemption by any means may be required
to effect a redemption when deemed appropriate by Goldman Sachs. The request
for such redemption will not be considered to have been received in proper
form until such additional documentation has been received.
 
  Institutions (including banks, trust companies, brokers and investment
advisers) are responsible for the timely transmittal of redemption requests by
their customers to the Transfer Agent. In order to facilitate the timely
transmittal of redemption requests, these institutions have established times
by which redemption requests must be received by them. Additional
documentation may be required when deemed appropriate by an institution.
 
                               ----------------
 
                                      52
<PAGE>
 
 
                                   APPENDIX
 
 
                   GUIDELINES FOR CERTIFICATION OF TAXPAYER
               IDENTIFICATION NUMBER ON ACCOUNT INFORMATION FORM
 
  You are required by law to provide a Fund with your correct Taxpayer
Identification Number (TIN), regardless of whether you file tax returns.
Failure to do so may subject you to penalties. Failure to provide your correct
TIN and to sign your name in the Certification section of the Account
Information Form could result in withholding of 31% by a Fund for the federal
backup withholding tax on distributions, redemptions, exchanges and other
payments relating to your account.
 
  Any tax withheld may be credited against taxes owed on your federal income
tax return.
 
  If you do not have a TIN, you should apply for one immediately by contacting
your local office of the Social Security Administration or the Internal
Revenue Service (IRS). Backup withholding could apply to payments relating to
your account while you are awaiting receipt of a TIN.
 
  Special rules apply for certain entities. For example, for an account
established under a Uniform Gifts or Transfers to Minors Act, the TIN of the
minor should be furnished.
 
  If you have been notified by the IRS that you are subject to backup
withholding because you failed to report your interest and/or dividend income
on your tax return and you have not been notified by the IRS that such
withholding should cease, you must cross out item (2) in the Certification
section of the Account Information Form.
 
  If you are an exempt recipient, you should furnish your TIN and certify your
exemption by signing the Certification section and writing "exempt" after your
signature. Exempt recipients include: corporations, tax-exempt pension plans
and IRAs, governmental agencies, financial institutions, registered securities
and commodities dealers and others.
 
  If you are a nonresident alien or foreign entity, you must provide a
completed Form W-8 to a Fund in order to avoid backup withholding on certain
payments. Other payments to you may be subject to nonresident alien
withholding of up to 30%.
 
  For further information regarding backup and nonresident alien withholding,
see Sections 3406, 1441 and 1442 of the Internal Revenue Code and consult your
tax adviser.
 
                                      A-1
<PAGE>
 
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS ASSET
MANAGEMENT
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN SACHS FUNDS
MANAGEMENT, L.P.
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN SACHS ASSET
MANAGEMENT INTERNATIONAL
133 PETERBOROUGH COURT
LONDON, ENGLAND EC4A 2BB
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR
85 BROAD STREET
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
TRANSFER AGENT
4900 SEARS TOWER
CHICAGO, ILLINOIS 60606
 
STATE STREET BANK AND TRUST COMPANY
CUSTODIAN
1776 HERITAGE DRIVE
NORTH QUINCY, MASSACHUSETTS 02171
 
ARTHUR ANDERSEN LLP
INDEPENDENT PUBLIC ACCOUNTANTS
225 FRANKLIN STREET
BOSTON, MASSACHUSETTS 02110
 
 
 
TOLL FREE (IN U.S.) . . . . . . . . 800-621-2550
 
FIPROINST
501420
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS
FIXED INCOME FUNDS
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
INSTITUTIONAL SHARES
 
 
 
LOGO
Goldman 
Sachs 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
- --------------------------------------------------------------------------------
 
PROSPECTUS              GOLDMAN SACHS FIXED INCOME FUNDS
March 1, 1998, as revised    ADMINISTRATION SHARES
September 1, 1998
GOLDMAN SACHS ADJUSTABLE RATE GOVERNMENT FUND
  Seeks a high level of current income, consistent with low volatility of
  principal. The Fund invests primarily in adjustable rate mortgage pass-
  through securities and other mortgage securities with periodic interest rate
  resets, which are issued or guaranteed by the U.S. government, its agencies,
  instrumentalities or sponsored enterprises.
 
GOLDMAN SACHS SHORT DURATION GOVERNMENT FUND
  Seeks a high level of current income and secondarily, in seeking current in-
  come, may also consider the potential for capital appreciation. The Fund in-
  vests primarily in securities issued or guaranteed by the U.S. government,
  its agencies, instrumentalities or sponsored enterprises.
 
GOLDMAN SACHS SHORT DURATION TAX-FREE FUND
  Seeks a high level of current income, consistent with relatively low vola-
  tility of principal, that is exempt from regular federal income tax. The
  Fund invests primarily in municipal securities.
 
GOLDMAN SACHS CORE FIXED INCOME FUND
  Seeks a total return consisting of capital appreciation and income that ex-
  ceeds the total return of the Lehman Brothers Aggregate Bond Index. The Fund
  invests primarily in fixed-income securities, including securities issued or
  guaranteed by the U.S. government, its agencies, instrumentalities or spon-
  sored enterprises, corporate securities, mortgage-backed securities and as-
  set-backed securities.
 
  This Prospectus provides information about Goldman Sachs Trust (the "Trust")
and the Funds that a prospective investor should understand before investing.
This Prospectus should be retained for future reference. A Statement of
Additional Information (the "Additional Statement"), dated March 1, 1998, as
revised September 1, 1998, containing further information about the Trust and
the Funds which may be of interest to investors, has been filed with the
Securities and Exchange Commission ("SEC"), is incorporated herein by reference
in its entirety, and may be obtained without charge from Service Organizations
(as defined herein) or Goldman Sachs by calling the telephone number, or
writing to one of the addresses, listed on the back cover of this Prospectus.
The SEC maintains a Web site (http://www.sec.gov) that contains the Additional
Statement and other information regarding the Trust.
 
ADMINISTRATION SHARES OF THE FUNDS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR
GUARANTEED OR ENDORSED BY, ANY BANK OR OTHER INSURED DEPOSITORY INSTITUTION,
AND ARE NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL
RESERVE BOARD OR ANY OTHER GOVERNMENT AGENCY. AN INVESTMENT IN A FUND INVOLVES
INVESTMENT RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
 
                                                        (continued on next page)
<PAGE>
 
(cover continued)
 
  THE ADJUSTABLE RATE GOVERNMENT AND SHORT DURATION GOVERNMENT FUNDS' NET
ASSET VALUES AND YIELDS ARE NOT GUARANTEED BY THE U.S. GOVERNMENT OR BY ITS
AGENCIES, INSTRUMENTALITIES OR SPONSORED ENTERPRISES.
 
  THE CORE FIXED INCOME FUND MAY INVEST IN SECURITIES OF FOREIGN ISSUERS AND
FOREIGN CURRENCIES THAT ENTAIL CERTAIN RISKS NOT CUSTOMARILY ASSOCIATED WITH
INVESTING IN U.S. DOLLAR-DENOMINATED FIXED-INCOME SECURITIES. IN PARTICULAR,
THE SECURITIES MARKETS OF EMERGING MARKET COUNTRIES ARE LESS LIQUID, ARE
SUBJECT TO GREATER PRICE VOLATILITY, HAVE SMALLER MARKET CAPITALIZATIONS, HAVE
LESS GOVERNMENT REGULATION AND ARE NOT SUBJECT TO AS EXTENSIVE AND FREQUENT
ACCOUNTING, FINANCIAL AND OTHER REPORTING REQUIREMENTS AS THE SECURITIES
MARKETS OF MORE DEVELOPED COUNTRIES. INVESTORS SHOULD CONSIDER THE RISKS
ASSOCIATED WITH INVESTMENT IN A FUND INVESTING IN FOREIGN SECURITIES. THE FUND
MAY NOT BE SUITABLE FOR ALL INVESTORS. SEE "DESCRIPTION OF SECURITIES" AND
"RISK FACTORS."
 
  Goldman Sachs Funds Management, L.P. ("GSFM"), New York, New York, an
affiliate of Goldman, Sachs & Co. ("Goldman Sachs"), serves as investment
adviser to the Adjustable Rate Government and Short Duration Government Funds.
Goldman Sachs Asset Management ("GSAM"), New York, New York, a separate
operating division of Goldman Sachs, serves as investment adviser to the Short
Duration Tax-Free and Core Fixed Income Funds. GSAM and GSFM are each referred
to in this Prospectus as the "Investment Adviser." Goldman Sachs serves as
each Fund's distributor and transfer agent.
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                      PAGE
                                      ----
<S>                                   <C>
Fund Highlights.....................    1
Fees and Expenses...................    5
Financial Highlights................    7
Investment Objectives and Policies..   11
Description of Securities...........   14
Risk Factors........................   21
Investment Techniques...............   23
Investment Restrictions.............   27
Portfolio Turnover..................   27
Management..........................   27
Dividends...........................   31
</TABLE>
<TABLE>
<CAPTION>
                                                                       PAGE
                                                                       ----
<S>                                                                    <C>
Expenses..............................................................  31
Net Asset Value.......................................................  32
Performance Information...............................................  32
Shares of the Trust...................................................  33
Taxation..............................................................  34
Additional Information................................................  35
Administration Plan...................................................  35
Reports to Shareholders...............................................  36
Purchase of Administration Shares.....................................  36
Exchange Privilege....................................................  38
Redemption of Administration Shares...................................  39
Appendix.............................................................. A-1
</TABLE>
<PAGE>
 
 
                                FUND HIGHLIGHTS
 
   The following is intended to highlight certain information and is
 qualified in its entirety by the more detailed information contained in this
 Prospectus.
 
 WHAT IS THE GOLDMAN SACHS TRUST?
 
   The Goldman Sachs Trust is an open-end management investment company that
 offers its shares in several investment funds (mutual funds). Each Fund
 pools the monies of investors by selling its shares to the public and
 investing these monies in a portfolio of securities designed to achieve that
 Fund's stated investment objectives.
 
 WHAT ARE THE INVESTMENT OBJECTIVES AND POLICIES OF THE FUNDS?
 
   Each Fund has distinct investment objectives and policies. There can be no
 assurance that a Fund's objectives will be achieved. For a further
 description of each Fund's investment objectives and policies, see
 "Investment Objectives and Policies," "Description of Securities" and
 "Investment Techniques."
 
 WHO MANAGES THE FUNDS?
 
   Goldman Sachs Funds Management, L.P., serves as Investment Adviser to the
 Adjustable Rate Government and Short Duration Government Funds. Goldman
 Sachs Asset Management serves as Investment Adviser to the Short Duration
 Tax-Free and Core Fixed Income Funds. As of July 24, 1998, the Investment
 Advisers, together with their affiliates, acted as Investment Adviser or
 distributor for assets in excess of $168 billion.
 
 WHO DISTRIBUTES THE FUNDS' SHARES?
 
   Goldman Sachs acts as distributor of each Fund's shares.
 
                                       1
<PAGE>
 
 
 
<TABLE>
<CAPTION>
                                                         EXPECTED
                                                       APPROXIMATE
                                                         INTEREST
                    INVESTMENT                             RATE
  FUND NAME         OBJECTIVES          DURATION       SENSITIVITY    INVESTMENT SECTOR      CREDIT QUALITY    OTHER INVESTMENTS
- --------------  ------------------ ------------------- ------------ ---------------------- ------------------ -------------------
<S>             <C>                <C>                 <C>          <C>                    <C>                <C>
ADJUSTABLE      A high level of    Target = 6-month    9-month note At least 65% of        U.S. Government    Fixed-rate
RATE            current income,    to 1-year                        total assets in        Securities         mortgage
GOVERNMENT      consistent with    U.S. Treasury                    securities issued or                      pass-through
FUND            low volatility     Security                         guaranteed by the                         securities and
                of principal.      Maximum = 2 years                U.S. government,                          repurchase
                                                                    its agencies,                             agreements
                                                                    instrumentalities                         collateralized by
                                                                    or sponsored                              U.S. Government
                                                                    enterprises                               Securities.
                                                                    ("U.S. Government
                                                                    Securities'')
                                                                    that are adjustable
                                                                    rate mortgage
                                                                    pass-through
                                                                    securities and
                                                                    other mortgage
                                                                    securities with
                                                                    periodic interest
                                                                    rate resets.
 --------------------------------------------------------------------------------------------
SHORT DURATION  A high level of    Target = 2-year     2-year bond  At least 65% of        U.S. Government    Mortgage pass-
GOVERNMENT      current income,    U.S. Treasury                    total assets in        Securities         through
FUND            and secondarily,   Security plus                    U.S. Government                           securities and
                in seeking current or minus .5 years                Securities                                other securities
                income, may        Maximum = 3 years                and repurchase                            representing an
                also consider the                                   agreements                                interest in or
                potential for                                       collateralized                            collateralized
                capital                                             by such securities.                       by mortgage loans.
                appreciation.
 --------------------------------------------------------------------------------------------
SHORT DURATION  A high level of    Target = Lehman     3-year bond  At least 80% of        Minimum = BBB/Baa  U.S. Government
TAX-FREE        current income,    Brothers                         net assets in                             Securities
FUND            consistent with    3-year Municipal                 municipal securities.                     and repurchase
                low volatility     Bond Index                                                                 agreements
                of principal,      plus or minus                                                              collateralized
                that is exempt     .5 years                                                                   by such securities.
                from regular       Maximum = 4 years
                federal
                income tax.
 --------------------------------------------------------------------------------------------
CORE FIXED      Total return       Target = Lehman     5-year bond  At least 65% of        Minimum = BBB/Baa  Foreign fixed-
INCOME FUND     consisting         Brothers                         assets in fixed-income Minimum for        income,
                of capital         Aggregate Bond                   securities, including  non-dollar         municipal and
                appreciation       Index plus or                    U.S. Government        securities = AA/Aa convertible
                and income that    minus 1 year                     Securities, corporate,                    securities,
                exceeds the total  Maximum = 6 years                mortgage-backed                           foreign currencies
                return of the                                       and asset-backed                          and repurchase
                Lehman Brothers                                     securities.                               agreements
                Aggregate Bond                                                                                collateralized
                Index.                                                                                        by U.S.
                                                                                                              Government
                                                                                                              Securities.
<CAPTION>
  FUND NAME         BENCHMARK
- --------------- -----------------
<S>             <C>
ADJUSTABLE      6-month and
RATE            1-Year U.S.
GOVERNMENT      Treasury Security
FUND
 --------------------------------------------------------------------------------------------
SHORT DURATION  2-Year U.S.
GOVERNMENT      Treasury Security
FUND
 --------------------------------------------------------------------------------------------
SHORT DURATION  Lehman Brothers
TAX-FREE        3-Year Municipal
FUND            Bond Index
 --------------------------------------------------------------------------------------------
CORE FIXED      Lehman Brothers
INCOME FUND     Aggregate Bond
                Index
</TABLE>
 
 
                                       2
<PAGE>
 
 
 WHAT ARE THE RISK FACTORS AND SPECIAL CHARACTERISTICS THAT I SHOULD CONSIDER
 BEFORE INVESTING?
 
   Each Fund's share price will fluctuate with market, economic and, with
 respect to the Core Fixed Income Fund, foreign exchange conditions, so that
 an investment in any of the Funds may be worth more or less when redeemed
 than when purchased. None of the Funds should be relied upon as a complete
 investment program. There can be no assurance that a Fund's investment
 objectives will be achieved. See "Risk Factors."
 
   Interest Rate Risk. When interest rates decline, the market value of
 fixed-income securities tends to increase. Conversely, when interest rates
 increase, the market value of fixed-income securities tends to decline.
 Volatility of a security's market value will differ depending upon the
 security's duration, the issuer and the type of instrument.
 
   Default Risk/Credit Risk. Investments in fixed-income securities are
 subject to the risk that the issuer could default on its obligations, and a
 Fund could sustain losses on such investments. A default could impact both
 interest and principal payments.
 
   Call Risk and Extension Risk. Fixed-income securities may be subject to
 both call risk and extension risk. Call risk (i.e., where the issuer
 exercises its right to pay principal on an obligation earlier than
 scheduled) causes cash flow to be returned earlier than expected. Call risk
 typically results when interest rates have declined. Under such
 circumstances, a Fund may be unable to recoup all of its initial investment
 and will also suffer from having to reinvest in lower yielding securities.
 Extension risk (i.e., where the issuer exercises its right to pay principal
 on an obligation later than scheduled) causes cash flows to be returned
 later than expected. Extension risk typically results when interest rates
 have increased. Under such circumstances, a Fund will suffer from the
 inability to invest in higher yielding securities. The investment
 characteristics of Mortgage-Backed Securities (including adjustable rate
 mortgage securities) and Asset-Backed Securities differ from those of
 traditional fixed-income securities because they generally have both call
 risk (also known as prepayment risk) and extension risk.
 
   Tax Risk of Municipal Securities. Because of their tax-exempt status, the
 yields and market values of municipal securities may be more adversely
 impacted by changes in tax rates and policies than taxable fixed-income
 securities.
 
   Foreign Risks. Investments in securities of foreign issuers and currencies
 involve risks that are different from those associated with investments in
 domestic securities. The risks associated with foreign investments and
 currencies include changes in relative currency exchange rates, political
 and economic developments, the imposition of exchange controls, confiscation
 and other governmental restrictions. In addition, the securities markets of
 foreign countries are generally less liquid and subject to greater price
 volatility. To the extent that the Core Fixed Income Fund invests in
 emerging markets and countries, these risks may be heightened.
 
   Other. A Fund's use of certain investment techniques, including
 derivatives, forward contracts, options, futures and swap transactions, will
 subject the Fund to greater risk than funds that do not employ such
 techniques.
 
                                       3
<PAGE>
 
 
 WHAT IS THE MINIMUM INVESTMENT?
 
   The Funds do not have any minimum purchase or account requirements with
 respect to Administration Shares. A Service Organization may, however,
 impose a minimum amount for initial and subsequent investments in
 Administration Shares, and may establish other requirements such as a
 minimum account balance.
 
 HOW DO I PURCHASE ADMINISTRATION SHARES?
 
   Customers of Service Organizations may invest in Administration Shares
 only through their Service Organizations. Administration Shares of a Fund
 are purchased at the current net asset value without any sales load. See
 "Purchase of Administration Shares."
 
   ADMINISTRATION PLAN. The Trust, on behalf of the Funds, has adopted an
 Administration Plan with respect to the Administration Shares which
 authorizes a Fund to compensate Service Organizations for providing account
 administration services to their customers who are the beneficial owners of
 such Shares. The Trust, on behalf of the Funds, will enter into agreements
 with each Service Organization which will provide for compensation to the
 Service Organization in an amount up to 0.25% (on an annualized basis) of
 the average daily net assets of the Administration Shares of the Funds
 attributable to or held in the name of the Service Organization for its
 customers. See "Administration Plan."
 
 HOW DO I SELL MY ADMINISTRATION SHARES?
 
   You may redeem Administration Shares upon request on any Business Day, as
 defined under "Additional Information," at the net asset value next
 determined after receipt of such request in proper form. See "Redemption of
 Administration Shares."
 
 HOW DO I RECEIVE DIVIDENDS AND DISTRIBUTIONS?
 
<TABLE>
<CAPTION>
                                                     INVESTMENT
                                                       INCOME
                                                     DIVIDENDS
                                                  ---------------- CAPITAL GAINS
     FUND                                         DECLARED  PAID   DISTRIBUTIONS
     ----                                         -------- ------- -------------
  <S>                                             <C>      <C>     <C>
  Adjustable Rate Government ....................  Daily   Monthly   Annually
  Short Duration Government .....................  Daily   Monthly   Annually
  Short Duration Tax-Free .......................  Daily   Monthly   Annually
  Core Fixed Income .............................  Daily   Monthly   Annually
</TABLE>
 
   Recordholders of Administration Shares may receive dividends in additional
 Administration Shares of the Fund in which they have invested or may elect
 to receive cash. For further information concerning dividends, see
 "Dividends."
 
                                       4
<PAGE>
 
 
                               FEES AND EXPENSES
                            (ADMINISTRATION SHARES)
 
<TABLE>
<CAPTION>
                                    ADJUSTABLE   SHORT      SHORT
                                       RATE     DURATION  DURATION
                                    GOVERNMENT GOVERNMENT   TAX-    CORE FIXED
                                       FUND       FUND    FREE FUND INCOME FUND
                                    ---------- ---------- --------- -----------
<S>                                 <C>        <C>        <C>       <C>
SHAREHOLDER TRANSACTION EXPENSES:
 Maximum Sales Charge Imposed on
  Purchases.......................     none       none      none       none
 Maximum Sales Charge Imposed on
  Reinvested Dividends............     none       none      none       none
 Redemption Fees..................     none       none      none       none
 Exchange Fees....................     none       none      none       none
ANNUAL FUND OPERATING EXPENSES:
 (as a percentage of average daily
 net assets)/1/
 Management Fees (after applicable
  limitations)/2/.................     0.40%      0.50%     0.35%      0.40%
 Administration Fees/3/...........     0.25%      0.25%     0.25%      0.25%
 Other Expenses (after applicable
  limitations)/4/ ................     0.09%      0.04%     0.04%      0.14%
                                       ----       ----      ----       ----
TOTAL FUND OPERATING EXPENSES (af-
 ter fee and expense limita-
 tions)/5/........................     0.74%      0.79%     0.64%      0.79%
                                       ====       ====      ====       ====
</TABLE>
 
EXAMPLE
 
  You would pay the following expenses on a hypothetical $1,000 investment
assuming (i) a 5% annual return and (ii) redemption at the end of each time
period.
 
<TABLE>
<CAPTION>
          FUND                                  1 YEAR 3 YEARS 5 YEARS 10 YEARS
          ----                                  ------ ------- ------- --------
<S>                                             <C>    <C>     <C>     <C>
Adjustable Rate Government.....................   $8     $24     $41     $92
Short Duration Government......................   $8     $25     $44     $98
Short Duration Tax-Free........................   $7     $20     $36     $80
Core Fixed Income..............................   $8     $25     $44     $98
</TABLE>
- --------
/1/ The Funds' annual operating expenses have been restated to reflect fees
    and expenses in effect as of September 1, 1998.
/2/ The Investment Adviser has voluntarily agreed that a portion of the
    management fee would not be imposed on the Short Duration Tax-Free Fund
    equal to 0.05%. Without such limitation, the management fee would be 0.40%
    of the Fund's average daily net assets.
/3/ Service Organizations may charge other fees to their customers who are
    beneficial owners of Administration Shares in connection with their customer
    accounts. See "Administration Plan."
/4/ The Investment Adviser has voluntarily agreed to reduce or limit certain
    other expenses (excluding management fees, transfer agency fees (equal to
    0.04% of the average daily net assets of each Fund's Administration
    Shares), administration fees, taxes, interest and brokerage fees and
    litigation, indemnification and other extraordinary expenses) to the
    extent such expenses exceed 0.05%, 0.00%, 0.00% and 0.10% of the average
    daily net assets of the Adjustable Rate Government, Short Duration
    Government, Short Duration Tax-Free and Core Fixed Income Funds,
    respectively.
/5/ Without the limitations described above, "Other Expenses" and "Total
    Operating Expenses" of the Administration Shares of the Funds would be as
    set forth below:
 
<TABLE>
<CAPTION>
                                                         OTHER   TOTAL OPERATING
                                                        EXPENSES    EXPENSES
                                                        -------- ---------------
     <S>                                                <C>      <C>
     Adjustable Rate Government........................   .12%         .77%
     Short Duration Government.........................   .26%        1.01%
     Short Duration Tax-Free...........................   .63%        1.28%
     Core Fixed Income.................................   .34%         .99%
</TABLE>
 
 
                                       5
<PAGE>
 
  The Investment Adviser and Goldman Sachs may modify or discontinue any of
the limitations set forth above in the future at their discretion. The
information set forth in the foregoing table and hypothetical example relates
only to Administration Shares of the Funds. Short Duration Government Fund,
Short Duration Tax-Free Fund and Core Fixed Income Fund also offer
Institutional Shares, Service Shares, Class A Shares, Class B Shares and Class
C Shares; Adjustable Rate Government Fund also offers Institutional Shares,
Service Shares and Class A Shares. The other classes of the Funds are subject
to different fees and expenses (which affect performance), have different
minimum investment requirements and are entitled to different services.
Information regarding any other class of the Funds may be obtained from your
sales representative or from Goldman Sachs by calling the number on the back
cover page of this Prospectus.
 
  In addition to the compensation itemized above, certain Service
Organizations may receive other compensation in connection with the sale and
distribution of Administration Shares or for services to their customers'
accounts and/or the Funds. For additional information regarding such
compensation, see "Purchase of Administration Shares" in this Prospectus and
the Additional Statement.
 
  The purpose of the foregoing table is to assist investors in understanding
the various fees and expenses of a Fund that an investor will bear directly or
indirectly. The information on the fees and expenses included in the table and
the hypothetical example above are based on each Fund's fees and expenses
(actual or estimated) and should not be considered as representative of past
or future expenses. Actual fees and expenses may be greater or less than those
indicated. Moreover, while the example assumes a 5% annual return, a Fund's
actual performance will vary and may result in an actual return greater or
less than 5%. See "Management--Investment Advisers" and "Administration Plan."
 
                                       6
<PAGE>
 
 
                             FINANCIAL HIGHLIGHTS
 
         SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD
 
  The following data have been audited by Arthur Andersen LLP, independent
public accountants, as indicated in their report incorporated by reference
into the Additional Statement from the Annual Report to shareholders for the
Funds for the year ended October 31, 1997 (the "Annual Report"). This
information should be read in conjunction with the financial statements and
related notes incorporated by reference and attached to the Additional
Statement. The Annual Report also contains performance information and is
available upon request and without charge by calling the telephone number or
writing to one of the addresses on the back cover of this Prospectus.
<TABLE>
<CAPTION>
                               Income (loss) from investment operations(n)
                           -------------------------------------------------------
                                          Net realized    Net realized
                                         and unrealized  and unrealized   Total
                                          gain (loss)     gain (loss)     income
                 Net asset               on investment,    on foreign     (loss)
                 value at     Net          option and       currency       from    
                 beginning investment       futures         related     investment 
                 of period   income       transactions    transactions  operations 
- ------------------------------------------------------------------------------------------------------- 
                                      ADJUSTABLE RATE GOVERNMENT FUND                    
- ------------------------------------------------------------------------------------------------------- 
<S>              <C>       <C>           <C>             <C>            <C>        
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-
Institutional
Shares..........  $ 9.83   $  0.5914(a)     $ 0.0494(a)       --         $0.6408    
1997-                                                                               
Administration                                                                      
Shares..........    9.83      0.5665(a)       0.0497(a)       --          0.6162    
1997-Service                                                                        
Shares(m).......    9.84      0.3298(a)       0.0400(a)       --          0.3698    
1997-Class A                                                                        
Shares..........    9.83      0.5662(a)       0.0500(a)       --          0.6162    
1996-                                                                               
Institutional                                                                       
Shares..........    9.77      0.5759(a)       0.0772(a)       --          0.6531    
1996-                                                                               
Administration                                                                      
Shares..........    9.77      0.5489(a)       0.0797(a)       --          0.6286    
1996-Class A                                                                        
Shares..........    9.77      0.5481(a)       0.0806(a)       --          0.6287    
1995-                                                                               
Institutional                                                                       
Shares..........    9.74      0.5630(a)       0.0717(a)       --          0.6347    
1995-                                                                               
Administration                                                                      
Shares..........    9.74      0.5366(a)       0.0737(a)       --          0.6103    
1995-Class A                                                                        
Shares(c).......    9.79      0.2721(a)      (0.0090)(a)      --          0.2631    
1994-                                                                               
Institutional                                                                       
Shares..........   10.00      0.4341(a)      (0.2455)(a)      --          0.1886    
1994-                                                                               
Administration                                                                      
Shares..........   10.00      0.4211(a)      (0.2572)(a)      --          0.1639    
1993-                                                                               
Institutional                                                                       
Shares..........   10.04      0.4397(a)      (0.0376)(a)      --          0.4021    
1993-                                                                               
Administration                                                                      
Shares(e).......   10.02      0.2146(a)      (0.0173)(a)      --          0.1973    
1992-                                                                               
Institutional                                                                       
Shares..........   10.03      0.5599(a)      (0.0029)(a)      --          0.5570    
FOR THE PERIOD JULY 17, 1991(G) THROUGH OCTOBER 31,                                 
- ---------------------------------------------------                                 
1991-                                                                               
Institutional                                                                       
Shares..........   10.00   0.1531(a)          0.0322(a)       --          0.1853    
- ------------------------------------------------------------------------------------------------------- 
<CAPTION>
                                                                                         
                                          Distributions to shareholders                                 
                                ------------------------------------------------------------            
                                                     In excess of                                  
                             From net                net realized                          Net     
                          realized gain                gain on                           increase  
                          on investment,  In excess  investment,   From       Total     (decrease) 
               From net       option        of net    option and   paid   distributions   in net   
              investment   and futures    investment   futures      in         to         asset    
                income     transactions     income   transactions capital shareholders    value     
- ------------------------------------------------------------------------------------------------------- 
                                      ADJUSTABLE RATE GOVERNMENT FUND                    
- ------------------------------------------------------------------------------------------------------- 
<S>              <C>            <C>            <C>        <C>          <C>     <C>           <C> 
FOR THE YEARS ENDED OCTOBER 31,                                                          
- -------------------------------                                                          
1997-                                                                                    
Institutional                                                                            
Shares.......... $(0.5908)      --             --        --         --      $(0.5908)    $ 0.0500  
1997-                                                                                              
Administration                                                                                     
Shares..........  (0.5662)      --             --        --         --       (0.5662)      0.0500  
1997-Service                                                                                       
Shares(m).......  (0.3298)      --             --        --         --       (0.3298)      0.0400  
1997-Class A                                                                                       
Shares..........  (0.5662)      --             --        --         --       (0.5662)      0.0500  
1996-                                                                                              
Institutional                                                                                      
Shares..........  (0.5725)      --         (0.0206)      --         --       (0.5931)      0.0600  
1996-                                                                                              
Administration                                                                                     
Shares..........  (0.5489)      --         (0.0198)      --         --       (0.5687)      0.0600  
1996-Class A                                                                                       
Shares..........  (0.5489)      --         (0.0198)      --         --       (0.5687)      0.0600  
1995-                                                                                              
Institutional                                                                                      
Shares..........  (0.5759)      --         (0.0287)      --         --       (0.6046)      0.0301  
1995-                                                                                              
Administration                                                                                     
Shares..........  (0.5528)      --         (0.0275)      --         --       (0.5803)      0.0300  
1995-Class A                                                                                       
Shares(c).......  (0.2697)      --         (0.0134)      --         --       (0.2831)     (0.0200) 
1994-                                                                                              
Institutional                                                                                      
Shares..........  (0.4486)      --             --        --         --       (0.4486)     (0.2600) 
1994-                                                                                              
Administration                                                                                     
Shares..........  (0.4239)      --             --        --         --       (0.4239)     (0.2600) 
1993-                                                                                              
Institutional                                                                                      
Shares..........  (0.4397)      --         (0.0024)      --         --       (0.4421)     (0.0400) 
1993-                                                                                              
Administration                                                                                     
Shares(e).......  (0.2146)      --         (0.0027)      --         --       (0.2173)     (0.0200) 
1992-                                                                                              
Institutional                                                                                      
Shares..........  (0.5470)      --             --        --         --       (0.5470)      0.0100   
FOR THE PERIOD JULY 17, 1991(G) THROUGH OCTOBER 31,                                      
- ---------------------------------------------------                                      
1991-                                                                                    
Institutional                                                                            
Shares..........  (0.1553)      --             --        --         --       (0.1553)      0.0300   
- ------------------------------------------------------------------------------------------------------- 

<CAPTION>
                                                                                           Ratios assuming
                                                                                         no voluntary waiver
                                                                                             of fees or
                                                                                         expense limitations
                                                                                        ---------------------
                                                     
                                                        Ratio of                 Net                Ratio of
                                            Ratio of      net                  assets                 net
                      Net asset               net      investment              at end    Ratio of  investment
                      value at              expenses     income   Portfolio      of      expenses    income
                       end of     Total    to average  to average turnover     period   to average to average
                       period   return(k)  net assets  net assets  rate(d)    (in 000s) net assets net assets
- -----------------------------------------------------------------------------------------------------------------
                                      ADJUSTABLE RATE GOVERNMENT FUND
- -----------------------------------------------------------------------------------------------------------------
<S>                    <C>      <C>        <C>         <C>        <C>         <C>       <C>        <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-
Institutional
Shares..........        $ 9.88     6.70%       0.49%      5.99%     46.58%    $ 463,511    0.52%      5.96%
1997-                 
Administration        
Shares..........          9.88     6.43        0.74       5.73      46.58         2,793    0.77       5.70
1997-Service          
Shares(m).......          9.88     3.81(f)     1.05(b)    5.64(b)   46.58(f)        346    1.08(b)    5.61(b)
1997-Class A          
Shares..........          9.88     6.43        0.74       5.60      46.58        43,393    1.02       5.32
1996-                 
Institutional         
Shares..........          9.83     6.86        0.45       5.85      52.36       613,149    0.51       5.79
1996-                 
Administration        
Shares..........          9.83     6.60        0.70       5.59      52.36         3,792    0.76       5.53
1996-Class A          
Shares..........          9.83     6.60        0.70       5.59      52.36        10,728    1.01       5.28
1995-                 
Institutional         
Shares..........          9.77     6.75        0.46       5.77      24.12       657,358    0.53       5.70
1995-                 
Administration        
Shares..........          9.77     6.48        0.71       5.50      24.12         3,572    0.78       5.43
1995-Class A          
Shares(c).......          9.77     2.74(f)     0.69(b)    5.87(b)   24.12(f)     15,203    1.01(b)    5.55(b)
1994-                 
Institutional         
Shares..........          9.74     1.88        0.46       4.38      37.81       942,523    0.49       4.35
1994-                 
Administration        
Shares..........          9.74     1.63        0.71       4.27      37.81         6,960    0.74       4.24
1993-                 
Institutional         
Shares..........         10.00     4.13        0.45       4.36     103.74     2,760,871    0.48       4.33
1993-                 
Administration        
Shares(e).......         10.00     2.01(f)     0.70(b)    3.81(b)  103.74(f)      5,326    0.73(b)    3.78(b)
1992-                 
Institutional         
Shares..........         10.04     6.12        0.42       5.61     286.40     2,145,064    0.55       5.48
FOR THE PERIOD JULY 17, 1991(G) THROUGH OCTOBER 31,
- ---------------------------------------------------
1991-
Institutional
Shares..........         10.03     2.14(f)     0.20(b)    7.31(b)  145.67(f)    239,642    1.02(b)    6.49(b)
- -----------------------------------------------------------------------------------------------------------------
</TABLE> 
 
                                       7
<PAGE>
 
<TABLE>
<CAPTION>
                               Income (loss) from investment operations(n)
                           ------------------------------------------------------
                                         Net realized    Net realized
                                        and unrealized  and unrealized   Total
                                         gain (loss)     gain (loss)     income
                 Net asset              on investment,    on foreign     (loss)
                 value at     Net         option and       currency       from    
                 beginning investment      futures         related     investment 
                 of period   income      transactions    transactions  operations 
- ----------------------------------------------------------------------------------------------------------------------
                                        SHORT DURATION GOVERNMENT FUND
- ----------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>          <C>             <C>            <C>        
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-
Institutional
Shares..........  $ 9.83    $0.6412(a)     $ 0.0300(a)       --         $ 0.6712   
1997-                                                                              
Administration                                                                     
Shares..........    9.85     0.6183(a)       0.0400(a)       --           0.6583   
1997-Service                                                                       
Shares..........    9.82     0.5904(a)       0.0401(a)       --           0.6305   
1997-Class A                                                                       
Shares(o).......    9.78     0.3121(a)       0.0883(a)       --           0.4004   
1997-Class B                                                                       
Shares(o).......    9.75     0.2787(a)       0.1011(a)       --           0.3798   
1997-Class C                                                                       
Shares(p).......    9.83     0.1185(a)       0.0225(a)       --           0.1410   
1996-                                                                              
Institutional                                                                      
Shares..........    9.82     0.6290(a)       0.0136(a)       --           0.6426   
1996-                                                                              
Administration                                                                     
Shares(h).......    9.86     0.3837(a)       0.0003(a)       --           0.3840   
1996-Service                                                                       
Shares(i).......    9.72     0.3134(a)       0.1018(a)       --           0.4152   
1995-                                                                              
Institutional                                                                      
Shares..........    9.64     0.6652(a)       0.1666(a)       --           0.8318   
1995-                                                                              
Administration                                                                     
Shares..........    9.64     0.2384(a)      (0.0433)(a)      --           0.1951   
1994-                                                                              
Institutional                                                                      
Shares..........   10.14     0.5628(a)      (0.4592)(a)      --           0.1036   
1994-                                                                              
Administration                                                                     
Shares..........   10.14     0.5329(a)      (0.4539)(a)      --           0.0790   
1993-                                                                              
Institutional                                                                      
Shares..........   10.16     0.5627(a)      (0.0135)(a)      --           0.5492   
1993-                                                                              
Administration                                                                     
Shares(e).......   10.23     0.2725(a)      (0.0900)(a)      --           0.1825   
1992-                                                                              
Institutional                                                                      
Shares..........   10.22     0.6703(a)      (0.0600)(a)      --           0.6103   
1991-                                                                              
Institutional                                                                      
Shares..........   10.00     0.8020(a)       0.2200(a)       --           1.0220   
1990-                                                                              
Institutional                                                                      
Shares..........   10.07     0.8300(a)      (0.0700)(a)      --           0.7600   
1989-                                                                              
Institutional                                                                      
Shares..........   10.10     0.8800(a)        . --           --           0.8800   
FOR THE PERIOD AUGUST 15, 1988(G) THROUGH OCTOBER 31,                              
- -----------------------------------------------------                              
1988-                                                                              
Institutional                                                                      
Shares..........   10.00     0.1800(a)       0.1000(a)       --           0.2800   
- ----------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                                          
                           Distributions to shareholders                                  
                 -------------------------------------------------------------            
                                                      In excess of                                   
                              From net               net realized                           Net      
                            realized gain               gain on                            increase  
                            on investment, In excess  investment,   From        Total     (decrease) 
                 From net       option       of net    option and   paid    distributions   in net   
                investment   and futures   investment   futures      in          to         asset    
                  income     transactions    income   transactions capital  shareholders    value     
- ---------------------------------------------------------------------------------------------------- 
                                        SHORT DURATION GOVERNMENT FUND                    
- ---------------------------------------------------------------------------------------------------- 
<S>              <C>            <C>        <C>          <C>      <C>           <C>        <C> 
FOR THE YEARS ENDED OCTOBER 31,                                                           
- -------------------------------                                                           
1997-                                                                                     
Institutional                                                                             
Shares..........  $(0.6412)     --           --        --           --     $(0.6412)    $ 0.0300  
1997-                                                                                             
Administration                                                                                    
Shares..........   (0.6183)     --           --        --           --      (0.6183)      0.0400  
1997-Service                                                                                      
Shares..........   (0.5904)     --           --        --           --      (0.5904)      0.0401  
1997-Class A                                                                                      
Shares(o).......   (0.3004)     --           --        --           --      (0.3004)      0.1000  
1997-Class B                                                                                      
Shares(o).......   (0.2698)     --           --        --           --      (0.2698)      0.1100  
1997-Class C                                                                                      
Shares(p).......   (0.1110)     --           --        --           --      (0.1110)      0.0300  
1996-                                                                                             
Institutional                                                                                     
Shares..........   (0.6326)     --           --        --           --      (0.6326)      0.0100  
1996-                                                                                             
Administration                                                                                    
Shares(h).......   (0.3940)     --           --        --           --      (0.3940)     (0.0100) 
1996-Service                                                                                      
Shares(i).......   (0.3152)     --           --        --           --      (0.3152)      0.1000  
1995-                                                                                             
Institutional                                                                                     
Shares..........   (0.6518)     --           --        --           --      (0.6518)      0.1800  
1995-                                                                                             
Administration                                                                                    
Shares..........   (0.2051)     --           --        --           --      (0.2051)     (0.0100) 
1994-                                                                                             
Institutional                                                                                     
Shares..........   (0.5598) (0.0438)         --        --           --      (0.6036)     (0.5000) 
1994-                                                                                             
Administration                                                                                    
Shares..........   (0.5352) (0.0438)         --        --           --      (0.5790)     (0.5000) 
1993-                                                                                             
Institutional                                                                                     
Shares..........   (0.5627)     --       (0.0065)      --           --      (0.5692)     (0.0200) 
1993-                                                                                             
Administration                                                                                    
Shares(e).......   (0.2725)     --           --        --           --      (0.2725)     (0.0900) 
1992-                                                                                             
Institutional                                                                                     
Shares..........   (0.6703)     --           --        --           --      (0.6703)     (0.0600) 
1991-                                                                                             
Institutional                                                                                     
Shares..........   (0.8020)     --           --        --           --      (0.8020)      0.2200  
1990-                                                                                             
Institutional                                                                                     
Shares..........   (0.8300)     --           --        --           --      (0.8300)     (0.0700) 
1989-                                                                                             
Institutional                                                                                     
Shares..........   (0.8800)     --           --        --       (0.0300)    (0.9100)     (0.0300)  
FOR THE PERIOD AUGUST 15, 1988(G) THROUGH OCTOBER 31,                                     
- -----------------------------------------------------                                     
1988-                                                                                              
Institutional                                                                                      
Shares..........   (0.1800)     --           --        --           --      (0.1800)      0.1000  
- ---------------------------------------------------------------------------------------------------- 
<CAPTION>
                                                                                          Ratios assuming
                                                                                        no voluntary waiver
                                                                                            of fees or
                                                                                        expense limitations
                                                                                       ---------------------
                   
                                                       Ratio of                 Net                Ratio of
                                            Ratio of     net                  assets                 net
                    Net asset                 net     investment              at end    Ratio of  investment
                    value at                expenses    income   Portfolio      of      expenses    income
                     end of       Total    to average to average turnover     period   to average to average
                     period     return(k)  net assets net assets  rate(d)    (in 000s) net assets net assets
- ---------------------------------------------------------------------------------------------------------------------- 
                                        SHORT DURATION GOVERNMENT FUND
- ---------------------------------------------------------------------------------------------------------------------- 
<S>              <C>            <C>        <C>          <C>      <C>           <C>        <C>         <C>        
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-
Institutional
Shares..........     $ 9.86        7.07%      0.45%      6.43%    102.58%    $103,729     0.82%      6.06%
1997-               
Administration      
Shares..........       9.89        6.91       0.70       6.19     102.58        1,060     1.07       5.82
1997-Service        
Shares..........       9.86        6.63       0.95       5.92     102.58        3,337     1.32       5.55
1997-Class A        
Shares(o).......       9.88        4.14(f)    0.70(b)    6.05(b)  102.58(f)     9,491     1.32(b)    5.43(b)
1997-Class B        
Shares(o).......       9.86        3.94(f)    1.30(b)    5.52(b)  102.58(f)       747     1.82(b)    5.00(b)
1997-Class C        
Shares(p).......       9.86        1.44(f)    1.45(b)    5.52(b)  102.58(f)       190     1.82(b)    5.15(b)
1996-               
Institutional       
Shares..........       9.83        6.75       0.45       6.44     115.45       99,944     0.71       6.18
1996-               
Administration      
Shares(h).......       9.85        4.00(f)    0.70(b)    5.97(b)  115.45          252     0.96(b)    5.71(b)
1996-Service        
Shares(i).......       9.82        4.35(f)    0.95(b)    6.05(b)  115.45        1,822     1.21(b)    5.79(b)
1995-               
Institutional       
Shares..........       9.82        8.97       0.45       6.87     292.56      103,760     0.72       6.60
1995-               
Administration      
Shares..........       9.63(h)     2.10       0.70(b)    7.91(b)  292.56          --      0.90(b)    7.71(b)
1994-               
Institutional       
Shares..........       9.64        0.99       0.45       5.69     289.79      193,095     0.59       5.55
1994-               
Administration      
Shares..........       9.64        0.73       0.70       5.38     289.79          730     0.84       5.24
1993-               
Institutional       
Shares..........      10.14        5.55       0.45       5.46     411.66      359,708     0.64       5.31
1993-               
Administration      
Shares(e).......      10.14        1.74(f)    0.70(b)    4.84(b)  411.66       16,490     0.80(b)    4.74(b)
1992-               
Institutional       
Shares..........      10.16        6.24       0.45       6.60     216.07      277,927     0.69       6.36
1991-               
Institutional       
Shares..........      10.22       10.93       0.45       8.25     155.44      158,848     0.79       7.91
1990-               
Institutional       
Shares..........      10.00        8.23       0.45       8.62     173.21       68,995     0.95       8.12
1989-               
Institutional       
Shares..........      10.07        9.08       0.46       8.71     137.37       31,015     1.39       7.78
FOR THE PERIOD AUGUST 15, 1988(G) THROUGH OCTOBER 31,
- -----------------------------------------------------
1988-
Institutional
Shares..........      10.10        3.30(f)    0.55(b)    8.55(b)  167.00(f)    39,052     1.42(b)    7.68(b)
- ---------------------------------------------------------------------------------------------------------------------- 
</TABLE>
 
                                       8
<PAGE>
 
<TABLE>
<CAPTION>
                               Income (loss) from investment operations(n)
                           ------------------------------------------------------ 
                                         Net realized    Net realized
                                        and unrealized  and unrealized   Total
                                         gain (loss)     gain (loss)     income
                 Net asset              on investment,    on foreign     (loss)
                 value at     Net         option and       currency       from    
                 beginning investment      futures         related     investment 
                 of period   income      transactions    transactions  operations 
- ---------------------------------------------------------------------------------------------------------------------- 
                                         SHORT DURATION TAX-FREE FUND
- ---------------------------------------------------------------------------------------------------------------------- 
<S>              <C>       <C>          <C>             <C>            <C>       
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-
Institutional
Shares..........  $ 9.96    $0.4181(a)     $ 0.1091(a)       --         $ 0.5272   
1997-                                                                              
Administration                                                                     
Shares..........    9.96     0.3924(a)       0.1100(a)       --           0.5024   
1997-Service                                                                       
Shares..........    9.97     0.3675(a)       0.1000(a)       --           0.4675   
1997-Class A                                                                       
Shares(o).......    9.94     0.1950(a)       0.1400(a)       --           0.3350   
1997-Class B                                                                       
Shares(o).......    9.94     0.1663(a)       0.1368(a)       --           0.3031   
1997-Class C                                                                       
Shares(p).......   10.04     0.0670(a)       0.0300(a)       --           0.0970   
1996-                                                                              
Institutional                                                                      
Shares..........    9.94     0.4192(a)       0.0200(a)       --           0.4392   
1996-                                                                              
Administration                                                                     
Shares..........    9.94     0.3944(a)       0.0200(a)       --           0.4144   
1996-Service                                                                       
Shares..........    9.95     0.3697(a)       0.0200(a)       --           0.3897   
1995-                                                                              
Institutional                                                                      
Shares..........    9.79     0.4235(a)       0.1500(a)       --           0.5735   
1995-                                                                              
Administration                                                                     
Shares..........    9.79     0.3989(a)       0.1500(a)       --           0.5489   
1995-Service                                                                       
Shares..........    9.79     0.3744(a)       0.1600(a)       --           0.5344   
1994-                                                                              
Institutional                                                                      
Shares..........   10.23     0.3787(a)      (0.3575)(a)      --           0.0212   
1994-                                                                              
Administration                                                                     
Shares..........   10.23     0.3537(a)      (0.3575)(a)      --          (0.0038)  
1994-Service                                                                       
Shares(j).......    9.86     0.0475(a)      (0.0700)(a)      --          (0.0225)  
1993-                                                                              
Institutional                                                                      
Shares..........    9.93     0.3834(a)       0.3000(a)       --           0.6834   
1993-                                                                              
Administration                                                                     
Shares(j).......   10.16     0.1555(a)       0.0720(a)       --           0.2275   
FOR THE PERIOD OCTOBER 1, 1992(G) THROUGH OCTOBER 31,
- -----------------------------------------------------
1992-
Institutional
Shares..........   10.00     0.0341(a)      (0.0700)(a)      --          (0.0359)   
- ---------------------------------------------------------------------------------------------------------------------- 
<CAPTION>
                                                                                         
                         Distributions to shareholders                                   
                 ------------------------------------------------------------            
                                                      In excess of                                  
                               From net               net realized                          Net     
                            realized gain               gain on                           increase  
                            on investment, In excess  investment,   From       Total     (decrease) 
                 From net       option       of net    option and   paid   distributions   in net   
                investment   and futures   investment   futures      in         to         asset    
                  income     transactions    income   transactions capital shareholders    value     
- ---------------------------------------------------------------------------------------------------------------------- 
                                         SHORT DURATION TAX-FREE FUND                    
- ---------------------------------------------------------------------------------------------------------------------- 
<S>              <C>            <C>        <C>          <C>     <C>           <C>        
FOR THE YEARS ENDED OCTOBER 31,                                                          
- -------------------------------                                                          
1997-                                                                                    
Institutional                                                                            
Shares.......... $(0.4172)          --         --          --         --      $(0.4172)    $ 0.1100  
1997-                                                                                                
Administration                                                                                       
Shares..........  (0.3924)          --         --          --         --       (0.3924)      0.1100  
1997-Service                                                                                         
Shares..........  (0.3675)          --         --          --         --       (0.3675)      0.1000  
1997-Class A                                                                                         
Shares(o).......  (0.1950)          --         --          --         --       (0.1950)      0.1400  
1997-Class B                                                                                         
Shares(o).......  (0.1631)          --         --          --         --       (0.1631)      0.1400  
1997-Class C                                                                                         
Shares(p).......  (0.0670)          --         --          --         --       (0.0670)      0.0300  
1996-                                                                                                
Institutional                                                                                        
Shares..........  (0.4192)          --         --          --         --       (0.4192)      0.0300  
1996-                                                                                                
Administration                                                                                       
Shares..........  (0.3944)          --         --          --         --       (0.3944)      0.0300  
1996-Service                                                                                         
Shares..........  (0.3697)          --         --          --         --       (0.3697)      0.0200  
1995-                                                                                                
Institutional                                                                                        
Shares..........  (0.4235)          --         --          --         --       (0.4235)      0.1500  
1995-                                                                                                
Administration                                                                                       
Shares..........  (0.3989)          --         --          --         --       (0.3989)      0.1500  
1995-Service                                                                                         
Shares..........  (0.3744)          --         --          --         --       (0.3744)      0.1600  
1994-                                                                                                
Institutional                                                                                        
Shares..........  (0.3787)      (0.0825)       --          --         --       (0.4612)     (0.4400) 
1994-                                                                                                
Administration                                                                                       
Shares..........  (0.3537)      (0.0825)       --          --         --       (0.4362)     (0.4400) 
1994-Service                                                                                         
Shares(j).......  (0.0475)          --         --          --         --       (0.0475)     (0.0700) 
1993-                                                                                                
Institutional                                                                                        
Shares..........  (0.3834)          --         --          --         --       (0.3834)      0.3000  
1993-                                                                                                
Administration                                                                                       
Shares(j).......  (0.1555)          --         --          --         --       (0.1555)      0.0720   
FOR THE PERIOD OCTOBER 1, 1992(G) THROUGH OCTOBER 31,                                    
- -----------------------------------------------------                                    
1992-                                                                                    
Institutional                                                                            
Shares..........  (0.0341)          --         --          --         --       (0.0341)     (0.0700) 
- ----------------------------------------------------------------------------------------------------------------------  
<CAPTION>
                                                                                      Ratios assuming
                                                                                    no voluntary waiver
                                                                                        of fees or
                                                                                    expense limitations
                                                                                   ---------------------
                 
                                                   Ratio of                 Net                Ratio of
                                        Ratio of     net                  assets                 net
                 Net asset                net     investment              at end    Ratio of  investment
                 value at               expenses    income   Portfolio      of      expenses    income
                  end of     Total     to average to average turnover     period   to average to average
                  period   return(k)   net assets net assets  rate(d)    (in 000s) net assets net assets
- ----------------------------------------------------------------------------------------------------------------------  
                                         SHORT DURATION TAX-FREE FUND
- ----------------------------------------------------------------------------------------------------------------------  
<S>              <C>         <C>        <C>       <C>         <C>         <C>      <C>        <C>         
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-
Institutional
Shares..........   $10.07      5.40%       0.45%      4.18%    194.75%    $ 28,821     1.23%      3.40%
1997-             
Administration    
Shares..........    10.07      5.14        0.70       3.91     194.75           77     1.48       3.13
1997-Service      
Shares..........    10.07      4.77        0.95       3.66     194.75        2,051     1.73       2.88
1997-Class A      
Shares(o).......    10.08      3.39(f)     0.70(b)    3.81(b)  194.75(f)     4,023     1.73(b)    2.78(b)
1997-Class B      
Shares(o).......    10.08      3.07(f)     1.30(b)    3.31(b)  194.75(f)       106     2.23(b)    2.38(b)
1997-Class C      
Shares(p).......    10.07      0.97(f)     1.45(b)    2.60(b)  194.75(f)         2     2.23(b)    1.82(b)
1996-             
Institutional     
Shares..........     9.96      4.50        0.45       4.21     231.65       34,814     1.01       3.65
1996-             
Administration    
Shares..........     9.96      4.24        0.70       3.96     231.65           48     1.26       3.40
1996-Service      
Shares..........     9.97      3.98        0.95       3.74     231.65          695     1.51       3.18
1995-             
Institutional     
Shares..........     9.94      5.98        0.45       4.31     259.52       58,389     0.77       3.99
1995-             
Administration    
Shares..........     9.94      5.76        0.70       4.14     259.52           46     1.02       3.82
1995-Service      
Shares..........     9.95      5.59        0.95       3.87     259.52          454     1.27       3.55
1994-             
Institutional     
Shares..........     9.79      0.17        0.45       3.74     354.00       83,704     0.61       3.58
1994-             
Administration    
Shares..........     9.79     (0.11)       0.70       3.51     354.00        3,866     0.86       3.35
1994-Service      
Shares(j).......     9.79     (0.32)(f)    0.95(b)    4.30(b)  354.00          440     1.11(b)    4.14(b)
1993-             
Institutional     
Shares..........    10.23      7.03        0.41       3.70     404.60      115,803     1.06       3.05
1993-             
Administration    
Shares(j).......    10.23      2.28(f)     0.70(b)    3.32(b)  404.60          911     1.07(b)    2.95(b)
FOR THE PERIOD OCTOBER 1, 1992(G) THROUGH OCTOBER 31,
- -----------------------------------------------------
1992-
Institutional
Shares..........     9.93     (0.34)(f)    0.05(b)    4.58(b)   31.19(f)    14,601     2.68(b)    1.95(b)
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>
 
                                       9
<PAGE>
 

<TABLE> 
<CAPTION> 
                                  Income (loss) from investment operations(n)    
                              ---------------------------------------------------
                                          Net realized   Net realized            
                                         and unrealized and unrealized   Total   
                                          gain (loss)    gain (loss)     income  
                    Net asset            on investment,   on foreign     (loss)  
                     value at     Net      option and      currency       from   
                    beginning investment    futures        related     investment
                    of period   income    transactions   transactions  operations
- ---------------------------------------------------------------------------------
                                                        CORE FIXED INCOME FUND              
- ---------------------------------------------------------------------------------
<S>                 <C>       <C>         <C>            <C>           <C> 
For the Years Ended October 31,                                                  
- -------------------------------                                                  
1997-Institutional                                                               
Shares.............    $ 9.85    $0.6431       $0.2282       $(0.0005)  $ 0.8708 
1997-Administration                                                              
Shares.............      9.84     0.6182        0.2380        (0.0005)    0.8557 
1997-Service                                                                     
Shares.............      9.86     0.5937        0.2287        (0.0005)    0.8219 
1997-Class A                                                                     
Shares(o)..........      9.70     0.3059        0.3596        (0.0008)    0.6647 
1997-Class B                                                                     
Shares(o)..........      9.72     0.2686        0.3695        (0.0008)    0.6373 
1997-Class C                                                                     
Shares(p)..........      9.93     0.1118        0.1591        (0.0003)    0.2706 
1996-Institutional                                                               
Shares.............     10.00     0.6448       (0.0704)            -      0.5744 
1996-Administration                                                              
Shares(1)..........      9.91     0.4083       (0.0703)            -      0.3380 
1996-Service                                                                     
Shares(l)..........      9.77     0.3756        0.0898             -      0.4654 
1995-Institutional                                                               
Shares.............      9.24     0.6423        0.7610             -      1.4033 
For the Period January 5, 1994(g) through October 31,                            
- -----------------------------------------------------           
1994-Institutional                                                               
Shares.............     10.00     0.4648       (0.7617)            -     (0.2969)

<CAPTION> 
                                                   Distributions to shareholders                     
                              -----------------------------------------------------------------------
                                                                   In excess of                      
                                            From net               net realized                      
                                         realized gain                gain on                        
                                         on investment,  In excess  investment,   From      Total    
                               From net      option       of net    option and    paid  distributions
                              investment  and futures   investment    futures      in        to      
                                income    transactions    income   transactions capital shareholders 
- -----------------------------------------------------------------------------------------------------
                                                                 CORE FIXED INCOME FUND              
- -----------------------------------------------------------------------------------------------------
<S>                           <C>         <C>           <C>         <C>         <C>     <C> 
For the Years Ended October 31,                                                                      
- -------------------------------                                                                      
1997-Institutional                                                                                   
Shares.............            $(0.6408)            -           -            -       -      $(0.6408)
1997-Administration                                                                                  
Shares.............             (0.6157)            -           -            -       -       (0.6157)
1997-Service                                                                                         
Shares.............             (0.5919)            -           -            -       -       (0.5919)
1997-Class A                                                                                         
Shares(o)..........             (0.3048)            -           -            -       -       (0.3048)
1997-Class B                                                                                         
Shares(o)..........             (0.2673)            -           -            -       -       (0.2673)
1997-Class C                                                                                         
Shares(p)..........             (0.1107)            -           -            -       -       (0.1107)
1996-Institutional                                                                                   
Shares.............             (0.6438)       (0.0806)         -            -       -       (0.7244)
1996-Administration                                                                                  
Shares(1)..........             (0.4080)            -           -            -       -       (0.4080)
1996-Service                                                                                         
Shares(l)..........             (0.3754)            -           -            -       -       (0.3754)
1995-Institutional                                                                                   
Shares.............             (0.6433)            -           -            -       -       (0.6433)
For the Period January 5, 1994(g) through October 31,                                                                       
- -----------------------------------------------------
1994-Institutional                                                               
Shares.............             (0.4648)            -           -            -       -       (0.4648)

<CAPTION> 
                                                                                                             Ratios assuming
                                                                                                           no voluntary waiver   
                                                                                                               of fees or        
                                                                                                           expense limitations   
                                                                                                           --------------------- 
                                                                                                                                 
                                 Net                                     Ratio of                   Net               Ratio of   
                               increase                       Ratio of     net                     assets               net      
                              (decrease) Net asset              net      investment                at end  Ratio of   investment 
                                in net    value at            expenses    income    Portfolio        of    expenses    income    
                                asset      end of   Total     to average to average  turnover      period  to average to average 
                                value      period  return(k)  net assets net assets  rate(d)     (in 000s) net assets net assets 
- --------------------------------------------------------------------------------------------------------------------------------
                                                                                                                      
- --------------------------------------------------------------------------------------------------------------------------------
<S>                           <C>        <C>       <C>        <C>        <C>        <C>          <C>       <C>       <C> 
For the Years Ended October 31,
- -------------------------------
1997-Institutional                                                                                                               
Shares.............            $ 0.2300     $10.08    9.19%      0.45%      6.53%      361.27%     $79,230    0.83%      6.15%   
1997-Administration                                                                                                              
Shares.............              0.2300      10.07    8.92       0.70       6.27       361.27        6,176    1.08       5.89    
1997-Service                                                                                                                     
Shares.............              0.2300      10.09    8.65       0.95       6.00       361.27        1,868    1.33       5.62    
1997-Class A                                                                                                                     
Shares(o)..........              0.3599      10.06    6.94(f)    0.70(b)    6.13(b)    361.27(f)     9,336    1.33(b)    5.50(b) 
1997-Class B                                                                                                                     
Shares(o)..........              0.3700      10.09    6.63(f)    1.45(b)    5.28(b)    361.27(f)       621    1.83(b)    4.90(b) 
1997-Class C                                                                                                                     
Shares(p)..........              0.1599      10.09    2.74(f)    1.45(b)    4.84(b)    361.27(f)       272    1.83(b)    4.46(b) 
1996-Institutional                                                                                                               
Shares.............             (0.1500)      9.85    5.98       0.45       6.51       414.20       72,061    0.83       6.13    
1996-Administration                                                                                                              
Shares(1)..........             (0.0700)      9.84    3.56(f)    0.70(b)    6.41(b)    414.20          702    1.08(b)    6.03(b) 
1996-Service                                                                                                                     
Shares(l)..........              0.0900       9.86    4.90(f)    0.95(b)    6.37(b)    414.20          381    1.33(b)    5.99(b) 
1995-Institutional                                                                                                               
Shares.............              0.7600      10.00   15.72       0.45       6.56       382.26       55,502    0.96       6.05    
For the Period January 5, 1994(g) through October 31,                                                                       
- -----------------------------------------------------
1994-Institutional                                                                                                               
Shares.............             (0.7617)      9.24   (3.00)      0.45(b)    6.48(b)    285.25       24,508    1.46(b)    5.47(b) 
</TABLE> 
 
(a) Calculated based on the average shares outstanding methodology.
(b) Annualized.
(c) Class A share activity commenced on May 15, 1995.
(d) Includes the effect of mortgage dollar roll transactions.
(e) Administration share activity commenced on April 15, 1993.
(f) Not annualized.
(g) Commencement of operations.
(h) Short Duration Government Fund Administration shares were redeemed in full 
    on February 23, 1995 and re-commenced on February 28, 1996 at $9.86. 
(i) Service share activity commenced on April 10, 1996.
(j) Administration and Service share activity commenced on May 20, 1993 and 
    September 20, 1994, respectively. 
(k) Assumes investment at the net asset value at the beginning of the period, 
    reinvestment of all dividends and distributions, a complete redemption of 
    the investment at the net asset value at the end of the period and no sales 
    charges. Total return would be reduced if a sales charge for Class A shares 
    or a contingent deferred sales charge for Class B and Class C shares were 
    taken into account. 
(l) Administration and Service share activity commenced on February 28, 1996 
    and March 13, 1996, respectively. 
(m) Service share activity commenced on March 27, 1997.
(n) Includes the balancing effect of calculating per share amounts.
(o) Class A and Class B share activity commenced on May 1, 1997.
(p) Class C share activity commenced on August 15, 1997.
- -------------------------------------------------------------------------------
                                       10
<PAGE>
 
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
 
  The investment objectives and principal investment policies of each Fund are
described below. Other investment practices and management techniques, which
involve certain risks are described under "Description of Securities," "Risk
Factors" and "Investment Techniques." There can be no assurance that a Fund's
investment objectives will be achieved.
 
  A Fund's duration approximates its price sensitivity to changes in interest
rates. Maturity measures the time until final payment is due; it takes no
account of the pattern of a security's cash flows over time. In computing
portfolio duration, a Fund will estimate the duration of obligations that are
subject to prepayment or redemption by the issuer taking into account the
influence of interest rates on prepayments and coupon flows. This method of
computing duration is known as "option-adjusted" duration. A Fund will not be
limited as to its maximum weighted average portfolio maturity or the maximum
stated maturity with respect to individual securities unless otherwise noted.
 
  A Fund will deem a security to have met its minimum credit rating
requirement if the security receives the minimum required long-term rating (or
the equivalent short-term credit rating) at the time of purchase from at least
one nationally recognized statistical rating organization ("NRSRO") including,
but not limited to, Standard & Poor's Ratings Group ("S&P") and Moody's
Investors Service, Inc. ("Moody's") even though it has been rated below the
minimum rating by one or more other NRSROs, or, if unrated, is determined by
the Investment Adviser to be of comparable quality. If a security satisfies a
Fund's minimum rating criteria at the time of purchase and is subsequently
downgraded below such rating, the Fund will not be required to dispose of such
security. If a downgrade occurs, the Investment Adviser will consider what
action, including the sale of such security, is in the best interest of a Fund
and its shareholders.
 
  The Investment Adviser will usually have access to the research of, and
certain proprietary technical models developed by, Goldman Sachs and will
apply quantitative and qualitative analysis in determining the appropriate
allocations among the categories of issuers and types of securities.
 
 ADJUSTABLE RATE GOVERNMENT FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income, consistent with low volatility of principal.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be in a range approximately equal to that of a six-month to one-
year U.S. Treasury security. In addition, under normal interest rate
conditions, the Fund's maximum duration will not exceed two years. The
approximate interest rate sensitivity of the Fund is expected to be comparable
to a nine-month note.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in U.S. Government Securities that are adjustable rate
mortgage pass-through securities and other mortgage securities with periodic
interest rate results. The remainder of the Fund's assets (up to 35%) may be
invested in other U.S. Government Securities, including fixed rate mortgage
pass-through securities, other securities representing an interest in or
collateralized by adjustable rate and fixed rate mortgage loans ("Mortgage-
Backed Securities") and repurchase agreements collateralized by U.S.
Government Securities. Substantially all of the Fund's assets will be invested
in U.S. Government Securities. 100% of the Fund's portfolio will be invested
in U.S. dollar-denominated securities.
 
 
                                      11
<PAGE>
 
  CREDIT QUALITY. The Fund invests in U.S. Government Securities and
repurchase agreements collateralized by such securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), mortgage and
interest rate swaps and interest rate floors, caps and collars. The Fund may
also employ other investment techniques to seek to enhance returns, such as
lending portfolio securities and entering into mortgage dollar rolls,
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 SHORT DURATION GOVERNMENT FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide a high level of
current income. Secondarily, the Fund may, in seeking current income, also
consider the potential for capital appreciation.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the two-year U.S.
Treasury security, plus or minus .5 years. In addition, under normal interest
rate conditions, the Fund's maximum duration will not exceed three years. The
approximate interest rate sensitivity of the Fund is expected to be comparable
to a two-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal market conditions, at
least 65% of its total assets in U.S. Government Securities and in repurchase
agreements collateralized by such securities. Substantially all of the Fund's
assets will be invested in U.S. Government Securities. 100% of the Fund's
portfolio will be invested in U.S. dollar-denominated securities.
 
  CREDIT QUALITY. The Fund invests in U.S. Government Securities and
repurchase agreements collateralized by such securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), mortgage and
interest rate swaps and interest rate floors, caps and collars. The Fund may
also employ other investment techniques to seek to enhance returns, such as
lending portfolio securities and entering into mortgage dollar rolls,
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 SHORT DURATION TAX-FREE FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income, consistent with relatively low volatility of
principal, that is exempt from regular federal income tax.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
three-year Municipal Bond Index, plus or minus .5 years. In addition, under
normal interest rate conditions, the Fund's maximum duration will not exceed
four years. The approximate interest rate sensitivity of the Fund is expected
to be comparable to a three-year bond.
 
 
                                      12
<PAGE>
 
  INVESTMENT SECTOR. The Fund invests, under normal conditions, at least 80%
of its net assets in fixed- income securities issued by or on behalf of
states, territories and possessions of the United States (including the
District of Columbia) and the political subdivisions, agencies and
instrumentalities thereof ("Municipal Securities"), the interest on which is
exempt from regular federal income tax (i.e., excluded from gross income for
federal income tax purposes), and is not a tax preference item under the
federal alternative minimum tax. Under normal circumstances, the Fund's
investments in private activity bonds and taxable investments will not exceed,
in the aggregate, 20% of the Fund's net assets. The interest from certain
private activity bonds (including the Fund's distributions of such interest)
may be a preference item for purposes of the federal alternative minimum tax.
100% of the Fund's portfolio will be invested in U.S. dollar-denominated
securities.
 
  CREDIT QUALITY. The Municipal Securities in which the Fund invests will be
rated, at the time of investment, at least BBB or Baa by an NRSRO or, if
unrated, will be determined by the Investment Adviser to be of comparable
quality. Municipal Securities rated BBB or Baa are considered medium-grade
obligations with speculative characteristics, and adverse economic conditions
or changing circumstances may weaken their issuers' capability to pay interest
and repay principal. The credit rating assigned to Municipal Securities may
reflect the existence of guarantees, letters of credit or other credit
enhancement features available to the issuers or holders of such Municipal
Securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), interest rate
swaps, floors, caps and collars. The Fund may also employ other investment
techniques to seek to enhance returns, such as lending portfolio securities
and entering into repurchase agreements and other investment practices
described under "Investment Techniques."
 
  While the Fund, under normal market conditions, invests substantially all of
its assets in Municipal Securities, the recognition of certain accrued market
discount income (if the Fund acquires Municipal Securities or other
obligations at a market discount), income from investments other than
Municipal Securities and any capital gains generated from the disposition of
investments, will result in taxable income. In addition to federal income tax,
shareholders may be subject to state, local or foreign taxes on distributions
of such income received from the Fund. See "Description of Securities."
 
 CORE FIXED INCOME FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
total return consisting of capital appreciation and income that exceeds the
total return of the Lehman Brothers Aggregate Bond Index (the "Index").
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
Aggregate Bond Index, plus or minus one year. In addition, under normal
interest rate conditions, the Fund's maximum duration will not exceed six
years. The approximate interest rate sensitivity of the Fund is expected to be
comparable to a five-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in fixed- income securities, including U.S. Government
Securities, corporate debt securities, Mortgage-Backed Securities, and Asset-
Backed Securities. The Fund may invest up to 25% of its total assets in
obligations of domestic and
 
                                      13
<PAGE>
 
foreign issuers which are denominated in currencies other than the U.S.
dollar, 10% of which may be invested in issuers in countries with emerging
markets and economies. A number of investment strategies will be used to
achieve the Fund's investment objective, including market sector selection,
determination of yield curve exposure, and issuer selection. In addition, the
Investment Adviser will attempt to take advantage of pricing inefficiencies in
the fixed income markets.
 
  The Index currently includes U.S. Government Securities and fixed-rate,
publicly issued, U.S. dollar-denominated fixed-income securities rated at
least BBB or Baa by an NRSRO. The securities currently included in the Index
have at least one year remaining to maturity; have an outstanding principal
amount of at least $100 million; and are issued by the following types of
issuers, with each category receiving a different weighting in the Index: U.S.
Treasury; agencies, authorities or instrumentalities of the U.S. government;
issuers of Mortgage-Backed Securities; utilities; industrial issuers;
financial institutions; foreign issuers; and issuers of Asset-Backed
Securities. The Index is a trademark of Lehman Brothers. Inclusion of a
security in the Index does not imply an opinion by Lehman Brothers as to its
attractiveness or appropriateness for investment. Although Lehman Brothers
obtains factual information used in connection with the Index from sources
which it considers reliable, Lehman Brothers claims no responsibility for the
accuracy, completeness or timeliness of such information and has no liability
to any person for any loss arising from results obtained from the use of the
Index data.
 
  CREDIT QUALITY. All U.S. dollar-denominated fixed-income securities
purchased by the Fund will be rated, at the time of investment, at least BBB
or Baa by an NRSRO. The non-U.S. dollar-denominated fixed-income securities in
which the Fund may invest will be rated, at the time of investment, at least
AA or Aa by an NRSRO or, if unrated, will be determined by the Investment
Adviser to be of comparable quality. Fixed-income securities rated BBB or Baa
are considered medium-grade obligations with speculative characteristics, and
adverse economic conditions or changing circumstances may weaken their
issuers' capability to pay interest and repay principal.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure, to seek to hedge its exposure to foreign
currencies and to seek to enhance returns. These techniques include, but are
not limited to, the use of financial futures contracts, option contracts
(including options on futures), forward foreign currency exchange contracts,
currency options and futures, currency, mortgage, credit and interest rate
swaps and interest rate floors, caps and collars. Currency management
techniques involve risks different from those associated with investing solely
in U.S. dollar-denominated fixed-income securities of U.S. issuers. It is
expected that the Fund will use certain currency techniques to seek to hedge
against currency exchange rate fluctuations or to seek to increase total
return. The Fund may invest in custodial receipts, Municipal Securities and
convertible securities. The Fund may also employ other investment techniques
to seek to enhance returns, such as lending portfolio securities and entering
into mortgage dollar rolls, repurchase agreements and other investment
practices, described under "Investment Techniques."
 
 
                           DESCRIPTION OF SECURITIES
 
 
U.S. GOVERNMENT SECURITIES
 
  Each Fund may invest in U.S. Government Securities. Generally, these
securities include U.S. Treasury obligations and obligations issued or
guaranteed by U.S. government agencies, instrumentalities or sponsored
enterprises which are supported by (a) the full faith and credit of the U.S.
Treasury (such as the Government National Mortgage Association ("Ginnie
Mae")), (b) the right of the issuer to borrow from the U.S. Treasury (such as
 
                                      14
<PAGE>
 
securities of the Student Loan Marketing Association), (c) the discretionary
authority of the U.S. government to purchase certain obligations of the issuer
(such as the Federal National Mortgage Association ("Fannie Mae") and Federal
Home Loan Mortgage Corporation ("Freddie Mac")), or (d) only the credit of the
issuer. No assurance can be given that the U.S. government will provide
financial support to U.S. government agencies, instrumentalities or sponsored
enterprises in the future.
 
  U.S. Government Securities also include Treasury receipts, zero coupon bonds
and other stripped U.S. Government Securities, where the interest and
principal components of stripped U.S. Government Securities are traded
independently. The most widely recognized program is the Separate Trading of
Registered Interest and Principal of Securities Program.
 
MORTGAGE-BACKED SECURITIES
 
  CHARACTERISTICS OF MORTGAGE-BACKED SECURITIES. Mortgage-Backed Securities
represent direct or indirect participations in, or are collateralized by and
payable from, mortgage loans secured by real property. Mortgagors can
generally prepay interest or principal on their mortgage whenever they choose.
Therefore, Mortgage-Backed Securities are often subject to more rapid
repayment than their stated maturity date would indicate as a result of
principal prepayments on the underlying loans. This can result in
significantly greater price and yield volatility than is the case with
traditional fixed-income securities. During periods of declining interest
rates, prepayments can be expected to accelerate, and thus impair a Fund's
ability to reinvest the returns of principal at comparable yields. Conversely,
in a rising interest rate environment, a declining prepayment rate will extend
the average life of many Mortgage-Backed Securities and prevent a Fund from
taking advantage of such higher yields.
 
  FIXED RATE MORTGAGE LOANS. Generally, fixed rate mortgage loans pay interest
at fixed annual rates and have original terms to maturity ranging from 5 to 40
years. Fixed-rate mortgage loans typically provide for monthly payments of
principal and interest in substantially equal installments for the term of the
mortgage note in sufficient amounts to amortize fully principal by maturity,
although certain fixed-rate mortgage loans provide for a large final "balloon"
payment upon maturity.
 
  ADJUSTABLE RATE MORTGAGE LOANS ("ARMS"). The Adjustable Rate Government Fund
will primarily, and the Short Duration Government and Core Fixed Income Funds
may, invest in ARMs, which are pass-through mortgage securities collateralized
by mortgages with adjustable rather than fixed coupon rates. ARMs generally
provide for a fixed initial mortgage interest rate for a set period.
Thereafter, the interest rates are subject to periodic adjustments based on
changes to a designated benchmark index.
 
  ARMs allow a Fund to participate in increases in interest rates through
periodic increases in the securities' coupon rates. During periods of
declining interest rates, coupon rates may readjust downward resulting in
lower yields to a Fund. Therefore, the value of an ARM is unlikely to rise
during periods of declining interest rates to the same extent as fixed-rate
securities. Interest rate declines may result in accelerated prepayment of
mortgages with the result that proceeds from prepayments will be reinvested at
lower interest rates. During periods of rising interest rates, changes in the
coupon rate will lag behind changes in the market rate. ARMs are also
typically subject to maximum increases and decreases in the interest rate
adjustment which can be made on any one adjustment date, in any one year, or
during the life of the security. In the event of dramatic increases or
decreases in prevailing market interest rates, the value of a Fund's
investments in ARMs may fluctuate more substantially since these limits may
prevent the security from fully adjusting its interest rate to the prevailing
market rates.
 
  U.S. GOVERNMENT GUARANTEED MORTGAGE-BACKED SECURITIES. Certain Mortgage-
Backed Securities are issued or guaranteed by the U.S. government, its
agencies, instrumentalities or sponsored enterprises. Such issuers include,
but are not limited to, Ginnie Mae, Fannie Mae and Freddie Mac. See "U.S.
Government Securities."
 
                                      15
<PAGE>
 
  PRIVATELY ISSUED MORTGAGE-BACKED SECURITIES. The Core Fixed Income Fund may
invest in Mortgage-Backed Securities issued or sponsored by non-governmental
entities. Privately issued Mortgage-Backed Securities are generally backed by
pools of conventional (i.e., non-government guaranteed or insured) mortgage
loans. Since such Mortgage-Backed Securities normally are not guaranteed by an
entity having the credit standing of Ginnie Mae, Fannie Mae or Freddie Mac, in
order to receive a high quality rating from the rating organizations (i.e.,
S&P or Moody's), they normally are structured with one or more types of
"credit enhancement."
 
  MULTIPLE CLASS MORTGAGE-BACKED SECURITIES AND COLLATERALIZED MORTGAGE
OBLIGATIONS. The Adjustable Rate Government, Short Duration Government and
Core Fixed Income Funds may also invest in multiple class securities,
including collateralized mortgage obligations ("CMOs") and Real Estate
Mortgage Investment Conduit ("REMIC") pass-through or participation
certificates. CMOs provide an investor with a specified interest in the cash
flow from a pool of underlying mortgages or of other Mortgage-Backed
Securities. CMOs are issued in multiple classes, each with a specified fixed
or floating interest rate and a final scheduled distribution date. In most
cases, payments of principal are applied to the CMO classes in the order of
their respective stated maturities, so that no principal payments will be made
on a CMO class until all other classes having an earlier stated maturity date
are paid in full. A REMIC is a CMO that qualifies for special tax treatment
under the Internal Revenue Code of 1986, as amended (the "Code"), and invests
in certain mortgages principally secured by interests in real property and
other permitted investments. The Funds do not intend to purchase residual
interests in REMICs.
 
  STRIPPED MORTGAGE-BACKED SECURITIES. The Adjustable Rate Government, Short
Duration Government and Core Fixed Income Funds may invest in Stripped
Mortgage-Backed Securities ("SMBS"), which are derivative multiple class
Mortgage-Backed Securities. SMBS are usually structured with two different
classes: one that receives 100% of the interest payments and the other that
receives 100% of the principal payments from a pool of mortgage loans. If the
underlying mortgage loans experience different than anticipated prepayments of
principal, a Fund may fail to recoup fully its initial investment in these
securities. The market value of the class consisting entirely of principal
payments generally is unusually volatile in response to changes in interest
rates. The yields on a class of SMBS that receives all or most of the interest
from mortgage loans are generally higher than prevailing market yields on
other Mortgage-Backed Securities because their cash flow patterns are more
volatile and there is a greater risk that the initial investment will not be
fully recouped. A Fund's investments in SMBS may require the Fund to sell
certain of its portfolio securities to generate sufficient cash to satisfy
certain income distribution requirements.
 
ASSET-BACKED SECURITIES
 
  The Core Fixed Income Fund may invest in Asset-Backed Securities. The
principal and interest payments on Asset-Backed Securities are collateralized
by pools of assets such as auto loans, credit card receivables, leases,
installment contracts and personal property. Such asset pools are securitized
through the use of special purpose trusts or corporations. Principal and
interest payments may be credit enhanced by a letter of credit, a pool
insurance policy or a senior/subordinated structure.
 
MUNICIPAL SECURITIES
 
  GENERAL. Municipal Securities in which the Short Duration Tax-Free Fund and,
to a limited extent, the Core Fixed Income Fund invest consist of bonds,
notes, commercial paper and other instruments (including participation
interests in such securities) issued by or on behalf of states, territories
and possessions of the United States (including the District of Columbia) and
their political subdivisions, agencies or instrumentalities, the interest on
which in the opinion of bond counsel for the issuers or counsel selected by
the Investment Adviser, is exempt from regular federal income tax (i.e.,
excluded from gross income for federal income tax purposes but
 
                                      16
<PAGE>
 
not necessarily exempt from federal alternative minimum tax or from state or
local taxes). Such securities may pay fixed, variable or floating rates of
interest. Municipal Securities are often issued to obtain funds for various
public purposes, including the construction of a wide range of public
facilities such as bridges, highways, housing, hospitals, mass transportation,
schools, streets and water and sewer works. Other public purposes for which
Municipal Securities may be issued include refunding outstanding obligations,
obtaining funds for general operating expenses, and obtaining funds to lend to
other public institutions and facilities. The Core Fixed Income Fund may also
invest in taxable Municipal Securities.
 
  PRIVATE ACTIVITY BONDS. Municipal Securities include "private activity
bonds" or industrial development bonds, which are issued by or on behalf of
public authorities to obtain funds for such projects as privately-operated
housing facilities, airport, mass transit or port facilities and sewage
disposal. In addition, proceeds of certain industrial development bonds are
used for constructing, equipping, repairing or improving privately operated
industrial or commercial facilities. The Short Duration Tax-Free Fund's
distributions attributable to the interest income from private activity bonds
may subject certain investors to the federal alternative minimum tax.
 
  MUNICIPAL LEASES AND CERTIFICATES OF PARTICIPATION. A municipal lease is an
obligation in the form of a lease or installment purchase which is issued by a
state or local government to acquire equipment and facilities. Certificates of
participation represent undivided interests in municipal leases, installment
purchase agreements or other instruments. The primary risk associated with
municipal lease obligations and certificates of participation is that the
governmental lessee will fail to appropriate funds to enable it to meet its
payment obligations under the lease. Although the obligations may be secured
by the leased equipment or facilities, the disposition of the property in the
event of non-appropriation or foreclosure might prove difficult, time
consuming and costly, and result in a delay in recovering or the failure to
fully recover the Fund's original investment. To the extent that a Fund
invests in unrated municipal leases or participates in such leases, the credit
quality rating and risk of cancellation of such unrated leases will be
monitored on an ongoing basis. Certain municipal lease obligations and
certificates of participation may be deemed illiquid for the purpose of a
Fund's limitation on investments in illiquid securities.
 
  PRE-REFUNDED MUNICIPAL SECURITIES. The interest and principal payments on
pre-refunded Municipal Securities are typically paid from the cash flow
generated from an escrow fund consisting of U.S. Government Securities. These
payments have been "pre-refunded" using the escrow fund.
 
  INSURED SECURITIES. "Insured" Municipal Securities are those for which
scheduled payments of interest and principal are guaranteed by a private (non-
governmental) insurance company. The insurance entitles a Fund to receive only
the face or par value of the securities held by the Fund. The insurance does
not guarantee the market value of the Municipal Securities or the net asset
value of a Fund's shares.
 
  AUCTION RATE SECURITIES. Auction rate Municipal Securities permit the holder
to sell the securities in an auction at par value at specified intervals. The
dividend or interest is typically reset by "Dutch" auction in which bids are
made by broker-dealers and other institutions for a certain amount of
securities at a specified minimum yield. The rate set by the auction is the
lowest interest or dividend rate that covers all securities offered for sale.
While this process is designed to permit auction rate securities to be traded
at par value, there is the risk that an auction will fail due to insufficient
demand for the securities. A Fund will take the time remaining until the next
scheduled auction date into account for purposes of determining the
securities' duration.
 
CORPORATE DEBT OBLIGATIONS
 
  The Core Fixed Income Fund may invest in corporate debt obligations. In
addition to obligations of corporations, corporate debt obligations include
securities issued by banks and other financial institutions. Corporate debt
obligations are subject to the risk of an issuer's inability to meet principal
and interest payments on the obligations.
 
                                      17
<PAGE>
 
  The Core Fixed Income Fund may also invest in trust preferred securities. A
trust preferred or capital security is a long dated bond (for example, 30
years) with preferred features. The preferred features are that payment of
interest can be deferred for a specified period without initiating a default
event. From a bondholder's viewpoint, the securities are senior in claim to
standard preferred stock but junior to other bondholders. From the issuer's
viewpoint, the securities are attractive because their interest is deductible
for tax purposes like other types of debt instruments.
 
CONVERTIBLE SECURITIES
 
  The Core Fixed Income Fund may invest in convertible debt obligations of an
issuer convertible at a stated exchange rate into common stock of the issuer.
Convertible securities generally offer lower interest or dividend yields than
non-convertible securities of similar quality. As with all debt securities,
the market value of convertible securities tends to decline as interest rates
increase and, conversely, to increase as interest rates decline. However, when
the market price of the common stock underlying a convertible security exceeds
the conversion price, the price of the convertible security tends to reflect
the market price of the underlying common stock. As the market price of the
underlying common stock declines, the convertible security tends to trade
increasingly on a yield basis, and thus may not depreciate to the same extent
as the underlying common stock. Convertible securities in which the Core Fixed
Income Fund invests are subject to the same rating criteria as its other
investments in fixed-income securities.
 
FOREIGN INVESTMENTS
 
  FOREIGN SECURITIES. The Core Fixed Income Fund may invest in fixed-income
securities of foreign issuers denominated in any currency but will limit its
investments in non-U.S. dollar-denominated fixed-income securities to 25% of
its total assets. This may offer potential benefits that are not available
from investing exclusively in U.S. dollar-denominated domestic issues. Foreign
countries may have economic policies or business cycles different from those
of the U.S. and markets for foreign fixed-income securities do not necessarily
move in a manner parallel to U.S. markets.
 
  Investing in the securities of foreign issuers involves risks that are not
typically associated with investing in fixed-income securities of domestic
issuers quoted in U.S. dollars. Such investments may be affected by changes in
currency rates, changes in foreign or U.S. laws or restrictions applicable to
such investments and in exchange control regulations (e.g., currency
blockage). A decline in the exchange rate of the currency (i.e., weakening of
the currency against the U.S. dollar) in which a portfolio security is quoted
or denominated relative to the U.S. dollar would reduce the value of the
portfolio security. In addition, if the currency in which the Fund receives
dividends, interest or other payments declines in value against the U.S.
dollar before such income is distributed as dividends to shareholders or
converted to U.S. dollars, the Fund may have to sell portfolio securities to
obtain sufficient cash to pay such dividends. The expected introduction of a
single currency, the euro, on January 1, 1999, for participating European
nations in the Economic and Monetary Union ("EU") presents unique
uncertainties, including whether the payment and operational systems of banks
and other financial institutions will be ready by the scheduled launch date;
the creation of suitable clearing and settlement payment systems for the new
currency; the legal treatment of certain outstanding financial contracts after
January 1, 1999, that refer to existing rather than the euro; the
establishment and maintenance of exchange rates for currencies being converted
into the euro and the euro; the fluctuation of the euro relative to non-euro
currencies during the transition period from January 1, 1999 to December 31,
2000 and beyond; whether the interest rate, tax and labor regimes of European
countries participating in the euro will converge over time; and whether the
conversion of the currencies of other EU countries such as the United Kingdom,
Denmark and Greece into the euro and the
 
                                      18
<PAGE>
 
admission of other non-EU countries such as Poland, Latvia and Lithuania as
members of the EU may have an impact on the euro. These or other factors,
including political and economic risks, could cause market disruptions before
or after the introduction of the euro, and could adversely affect the value of
securities and foreign currencies held by the Funds. In addition, clearance
and settlement procedures may be different in foreign countries and, in
certain markets, such procedures have been unable to keep pace with the volume
of securities transactions, making it more difficult to conduct such
transactions.
 
  The Core Fixed Income Fund may invest in an issuer domiciled in one country
yet issuing the security in the currency of another country. The Fund may also
invest in debt securities denominated in the European Currency Unit ("ECU"),
which is a "basket" consisting of specified amounts in the currencies of
certain of the twelve member states of the European Community. The specific
amounts of currencies comprising the ECU may be adjusted by the Council of
Ministers of the European Community from time to time to reflect changes in
relative values of the underlying currencies. In addition, the Fund may invest
in securities denominated in other currency "baskets."
 
  Foreign issuers are not generally subject to uniform accounting, auditing
and financial reporting standards comparable to those applicable to U.S.
issuers. There may be less publicly available information about a foreign
issuer than about a U.S. issuer. In addition, there is generally less
government regulation of foreign markets, companies and securities dealers
than in the U.S. Foreign securities markets may have substantially less volume
than U.S. securities markets and securities of many foreign issuers may be
less liquid and more volatile than securities of comparable domestic issuers.
Furthermore, with respect to certain foreign countries, there is a possibility
of nationalization, expropriation or confiscatory taxation, imposition of
withholding or other taxes on dividend or interest payments (or, in some
cases, capital gains), limitations on the removal of funds or other assets of
the Fund, political or social instability or diplomatic developments which
could affect investments in those countries.
 
  FOREIGN GOVERNMENT SECURITIES. The Core Fixed Income Fund may invest in debt
obligations of foreign governments and governmental agencies, including those
of emerging countries. Investment in sovereign debt obligations involves
special risks not present in debt obligations of corporate issuers. The issuer
of the debt or the governmental authorities that control the repayment of the
debt may be unable or unwilling to repay principal or interest when due in
accordance with the terms of such debt, and the Fund may have limited recourse
in the event of a default. Periods of economic uncertainty may result in the
volatility of market prices of sovereign debt, and in turn the Fund's net
asset value, to a greater extent than the volatility inherent in debt
obligations of U.S. issuers. A sovereign debtor's willingness or ability to
repay principal and pay interest in a timely manner may be affected by, among
other factors, its cash flow situation, the extent of its foreign currency
reserves, the availability of sufficient foreign exchange on the date a
payment is due, the relative size of the debt service burden to the economy as
a whole, the sovereign debtor's policy toward international lenders and the
political constraints to which a sovereign debtor may be subject.
 
  EMERGING MARKETS. The Core Fixed Income Fund may invest up to 10% of its
total assets in securities of issuers located in countries with emerging
economies or securities markets ("emerging markets"). Political and economic
structures in many emerging markets may be undergoing significant evolution
and rapid development, and emerging markets may lack the social, political and
economic stability characteristic of more developed countries. As a result,
the risks relating to investments in foreign securities described above,
including the possibility of nationalization, expropriation and confiscatory
taxation, may be heightened. In addition, unanticipated political and social
developments may affect the value of the Fund's investments in emerging
markets and the availability to the Fund of additional investments in such
countries. The small size and
 
                                      19
<PAGE>
 
inexperience of the securities markets in certain emerging markets and the
limited volume of trading in securities in those countries may make the Fund's
investments in such countries less liquid and more volatile than investments
in countries with more developed securities markets (such as the U.S., Japan
and most Western European countries). See the Additional Statement for further
information regarding the Fund's investments in emerging markets.
 
  FOREIGN CURRENCY TRANSACTIONS. Because investment in foreign issuers by the
Core Fixed Income Fund will usually involve currencies of foreign countries,
and because the Fund may have currency exposure independent of its securities
position, the value of a Fund's assets as measured in U.S. dollars will be
affected by changes in foreign currency exchange rates. The Fund may, to the
extent it invests in foreign securities, purchase or sell foreign currencies
on a spot basis and may also purchase or sell forward foreign currency
exchange contracts for hedging purposes and to seek to protect against
anticipated changes in future foreign currency exchange rates. In addition,
the Fund also may enter into such contracts to seek to increase total return
when the Investment Adviser anticipates that the foreign currency will
appreciate or depreciate in value, but securities denominated or quoted in
that currency do not present attractive investment opportunities and are not
held in the Fund's portfolio. When entered into to seek to increase total
return, forward foreign currency exchange contracts are considered
speculative. The Fund may also engage in cross-hedging by using forward
contracts in a currency different from that in which the hedged security is
denominated or quoted if the Investment Adviser determines that there is a
pattern of correlation between the two currencies. If the Fund enters into a
forward foreign currency exchange contract to buy foreign currency for any
purpose or to sell foreign currency to seek to increase total returns, the
Fund will be required to place cash or liquid assets in a segregated account
with the Fund's custodian in an amount equal to the value of the Fund's total
assets committed to the consummation of the forward contract, or to otherwise
cover its position in a manner permitted by the SEC. The Fund will incur costs
in connection with conversions between various currencies. The Fund may hold
foreign currency received in connection with investments in foreign securities
when, in the judgment of the Investment Adviser, it would be beneficial to
convert such currency in U.S. dollars at a later date, based on anticipated
changes in the relevant exchange rate.
 
  Currency exchange rates may fluctuate significantly over short periods of
time causing, along with other factors, the Fund's net asset value to
fluctuate. Currency exchange rates generally are determined by the forces of
supply and demand in the foreign exchange markets and the relative merits of
investments in different countries, actual or anticipated changes in interest
rates and other complex factors, as seen from an international perspective.
Currency exchange rates also can be affected unpredictably by the intervention
of U.S. or foreign governments or central banks, or the failure to intervene,
or by currency controls or political developments in the U.S. or abroad. To
the extent that a substantial portion of the Fund's total assets, adjusted to
reflect the Fund's net position after giving effect to currency transactions,
is denominated or quoted in the currencies of foreign countries, the Fund will
be more susceptible to the risk of adverse economic and political developments
within those countries.
 
  The market in forward foreign currency exchange contracts, currency swaps
and other privately negotiated currency instruments offers less protection
against defaults by the other party to such instruments than is available for
currency instruments traded on an exchange. Such contracts are subject to the
risk that the counterparty to the contract will default on its obligations.
Since these contracts are not guaranteed by an exchange or clearinghouse, a
default on a contract would deprive the Fund of unrealized profits,
transaction costs or the benefits of a currency hedge or force the Fund to
cover its purchase or sale commitments, if any, at the current market price.
The Fund will not enter into forward foreign currency exchange contracts,
currency swaps
 
                                      20
<PAGE>
 
or other privately negotiated instruments unless the credit quality of the
unsecured senior debt or the claims-paying ability of the counterparty is
considered to be investment grade by the Investment Adviser.
 
  The Core Fixed Income Fund's use of foreign currency management techniques
in emerging markets may be limited. Due to the limited market for these
instruments in emerging markets, the Investment Adviser does not currently
anticipate that a significant portion of the Fund's currency exposure in
emerging markets, if any, will be covered by such instruments. For a
discussion of such instruments and the risks associated with their use, see
"Investment Objectives and Policies" in the Additional Statement.
 
STRUCTURED SECURITIES
 
  The Core Fixed Income Fund may invest in structured securities. The value of
the principal of and/or interest on such securities is determined by reference
to changes in the value of specific currencies, interest rates, commodities,
indices or other financial indicators (the "Reference") or the relative change
in two or more References. The interest rate or the principal amount payable
upon maturity or redemption may be increased or decreased depending upon
changes in the applicable Reference. The terms of the structured securities
may provide that in certain circumstances no principal is due at maturity and,
therefore, result in the loss of the Fund's investment. Structured securities
may be positively or negatively indexed, so that appreciation of the Reference
may produce an increase or decrease in the interest rate or value of the
security at maturity. In addition, changes in the interest rates or the value
of the security at maturity may be a multiple of changes in the value of the
Reference. Consequently, structured securities may entail a greater degree of
market risk than other types of fixed-income securities. Structured securities
may also be more volatile, less liquid and more difficult to accurately price
than less complex securities.
 
ZERO COUPON, DEFERRED INTEREST, PAY-IN-KIND AND CAPITAL APPRECIATION BONDS
 
  Each Fund may invest in zero coupon, deferred interest and capital
appreciation bonds. These are securities issued at a discount from their face
value because interest payments are typically postponed until maturity. The
amount of the discount rate varies depending on factors including the time
remaining until maturity, prevailing interest rates, the security's liquidity
and the issuer's credit quality. These securities also may take the form of
debt securities that have been stripped of their interest payments. Each Fund
may also invest in pay-in-kind securities which are securities that have
interest payable by the delivery of additional securities. A portion of the
discount with respect to stripped tax-exempt securities or their coupons may
be taxable. The market prices of zero coupon, deferred interest, pay-in-kind
and capital appreciation bonds generally are more volatile than the market
prices of interest-bearing securities and are likely to respond to a greater
degree to changes in interest rates than interest-bearing securities having
similar maturities and credit quality. A Fund's investments in zero coupon,
deferred interest, pay-in-kind and capital appreciation bonds may require the
Fund to sell certain of its portfolio securities to generate sufficient cash
to satisfy certain income distribution requirements. See "Taxation" in the
Additional Statement.
 
 
                                 RISK FACTORS
 
 
  INTEREST RATE RISK. When interest rates decline, the market value of fixed
income securities tends to increase. Conversely, when interest rates increase,
the market value of fixed income securities tends to decline.
 
                                      21
<PAGE>
 
Volatility of a security's market value will differ depending upon the
security's duration, the issuer and the type of instrument.
 
  DEFAULT RISK/CREDIT RISK. Investments in fixed-income securities are subject
to the risk that the issuer could default on its obligations and a Fund could
sustain losses on such investments. A default could impact both interest and
principal payments.
 
  CALL RISK AND EXTENSION RISK. Fixed-income securities may be subject to both
call risk and extension risk. Call risk (i.e., where the issuer exercises its
right to pay principal on an obligation earlier than scheduled) causes cash
flow to be returned earlier than expected. Call risk typically results when
interest rates have declined. Under such circumstances, a Fund may be unable
to recoup all of its initial investment and will also suffer from having to
reinvest in lower yielding securities. Extension risk (i.e., where the issuer
exercises its right to pay principal on an obligation later than scheduled)
causes cash flows to be returned later than expected. Extension risk typically
results when interest rates have increased. Under such circumstances, a Fund
will suffer from the inability to invest in higher yielding securities.
Certain types of U.S. Government, Asset-Backed, corporate, foreign, Mortgage-
Backed and Municipal Securities have this call and/or extension risk.
 
  The investment characteristics of Mortgage-Backed Securities and Asset-
Backed Securities differ from those of traditional fixed-income securities
because they generally have both call risk (also known as prepayment risk) and
extension risk. Homeowners have the option to prepay their mortgage.
Therefore, the duration of a security backed by home mortgages can either
shorten (call risk) or lengthen (extension risk). Investors are exposed to the
fluctuating principal and interest payments associated with such securities.
In general, if interest rates on new mortgage loans fall sufficiently below
the interest rates on existing outstanding mortgage loans, the rate of
prepayment would be expected to increase. Conversely, if mortgage loan
interest rates rise above the interest rates on existing outstanding mortgage
loans, the rate of prepayment would be expected to decrease.
 
  ARMs also have the risk of prepayments, which will have a greater impact on
the Adjustable Rate Government Fund. The rate of principal prepayments with
respect to ARMs has fluctuated in recent years. As with fixed-rate mortgage
loans, ARMs may be subject to a greater rate of principal repayments in a
declining interest rate environment. For example, if prevailing interest rates
fall significantly, ARMs could be subject to higher prepayment rates (than if
prevailing interest rates remain constant or increase) because the
availability of low fixed-rate mortgages may encourage mortgagors to refinance
their ARMs to "lock-in" a fixed-rate mortgage. Conversely, if prevailing
interest rates rise significantly, ARMs may prepay more slowly. As with fixed-
rate mortgages, ARM prepayment rates vary in both stable and changing interest
rate environments. There are certain ARMs where the homeowner's payments do
not fully cover interest, so the principal balance increases over time. These
"negative amortizing" ARMs may be subject to greater default risk.
 
  DERIVATIVE MORTGAGE-BACKED SECURITIES. Because derivative Mortgage-Backed
Securities (such as principal-only (POs), interest-only (IOs) or inverse
floating rate securities) are more exposed to mortgage prepayments, they
generally involve a greater amount of risk. Small changes in prepayments can
significantly impact the cash flow and the market value of these securities.
The risk of faster than anticipated prepayments generally adversely affects
IOs, super floaters and premium priced Mortgage-Backed Securities. The risk of
slower than anticipated prepayments generally adversely affects POs, floating-
rate securities subject to interest rate caps, support tranches and discount
priced Mortgage-Backed Securities. In addition, particular derivative
securities may be leveraged such that their exposure (i.e., price sensitivity)
to interest rate and/or prepayment risk is magnified.
 
 
                                      22
<PAGE>
 
  RISKS OF DERIVATIVE TRANSACTIONS. A Fund's transactions, if any, in options,
futures, options on futures, swaps, interest rate caps, floors and collars,
structured securities, inverse floating-rate securities and currency
transactions involve certain risks, including a possible lack of correlation
between changes in the value of hedging instruments and the portfolio assets
being hedged, the potential illiquidity of the markets for derivative
instruments, the risks arising from the margin requirements and related
leverage factors associated with such transactions. The use of these
management techniques to seek to increase total return may be regarded as a
speculative practice and involves the risk of loss if the Investment Adviser
is incorrect in its expectation of fluctuations in securities prices, interest
rates or currency prices. A Fund's use of certain derivative transactions may
be limited by the requirements of the Internal Revenue Code of 1986, as
amended (the "Code") for qualification as a regulated investment company.
 
  TAX RISK OF MUNICIPAL SECURITIES. The yields and market values of Municipal
Securities may be more adversely impacted by changes in tax rates and policies
than taxable fixed-income securities. Because interest income from Municipal
Securities is normally not subject to regular federal income taxation, the
attractiveness of Municipal Securities in relation to other investment
alternatives is affected by changes in federal income tax rates applicable to,
or the continuing federal income tax-exempt status of, such interest income.
Any proposed or actual changes in such rates or exempt status, therefore, can
significantly affect the demand for and supply, liquidity and marketability of
Municipal Securities, which could in turn affect the Fund's ability to acquire
and dispose of Municipal Securities at desirable yield and price levels.
 
  OTHER RISKS. Floating-rate derivative debt securities present more complex
types of interest rate risks. For example, range floaters are subject to the
risk that the coupon will be reduced below market rates if a designated
interest rate floats outside of a specified interest rate band or collar. Dual
index or yield curve floaters are subject to lower prices in the event of an
unfavorable change in the spread between two designated interest rates.
 
  Asset-Backed Securities present certain credit risks that are not presented
by Mortgage-Backed Securities because Asset-Backed Securities generally do not
have the benefit of a security interest in collateral that is comparable to
mortgage assets. There is the possibility that, in some cases, recoveries on
repossessed collateral may not be available to support payments on these
securities.
 
  FOREIGN RISKS. See "Foreign Securities" for a description of the risks of
investing in foreign securities and currencies.
 
 
                             INVESTMENT TECHNIQUES
 
 
  MORTGAGE DOLLAR ROLLS. The Adjustable Rate Government, Short Duration
Government and Core Fixed Income Funds may enter into mortgage "dollar rolls"
in which a Fund sells securities for delivery in the current month and
simultaneously contracts with the same counterparty to repurchase
substantially similar (same type, coupon and maturity) but not identical
securities on a specified future date. During the roll period, the Fund loses
the right to receive principal and interest paid on the securities sold.
However, the Fund would benefit to the extent of any difference between the
price received for the securities sold and the lower forward price for the
future purchase or fee income plus the interest earned on the cash proceeds of
the securities sold until the settlement date for the forward purchase. Unless
such benefits exceed the income, capital appreciation and gain or loss due to
mortgage prepayments that would have been realized on the securities sold as
part of the mortgage dollar roll, the use of this technique will diminish the
investment performance of the Fund. Successful use of
 
                                      23
<PAGE>
 
mortgage dollar rolls depends upon the Investment Adviser's ability to predict
correctly interest rates and mortgage prepayments. There is no assurance that
mortgage dollar rolls can be successfully employed. The Fund will hold and
maintain in a segregated account until the settlement date cash or liquid
assets in an amount equal to the forward purchase price. For financial
reporting and tax purposes, each Fund treats mortgage dollar rolls as two
separate transactions; one involving the purchase of a security and a separate
transaction involving a sale. The Funds do not currently intend to enter into
mortgage dollar rolls that are accounted for as a financing.
 
  OPTIONS ON SECURITIES AND SECURITIES INDICES. Each Fund may write (sell)
covered call and put options and purchase put and call options on any
securities in which it may invest or on any securities index comprised of
securities in which it may invest. The writing and purchase of options is a
highly specialized activity which involves investment techniques and risks
different from those associated with ordinary portfolio securities
transactions. The use of options to seek to increase total return involves the
risk of loss if the Investment Adviser is incorrect in its expectation of
fluctuations in securities prices or interest rates. The successful use of
options for hedging purposes also depends in part on the ability of the
Investment Adviser to manage future price fluctuations and the degree of
correlation between the options and securities markets. If the Investment
Adviser is incorrect in its expectation of changes in securities prices or
determination of the correlation between the securities indices on which
options are written and purchased and the securities in a Fund's investment
portfolio, the investment performance of the Fund will be less favorable than
it would have been in the absence of such options transactions. The writing of
options could increase a Fund's portfolio turnover rate and, therefore,
associated brokerage commissions or spreads.
 
  OPTIONS ON FOREIGN CURRENCIES. The Core Fixed Income Fund may, to the extent
it invests in foreign securities, purchase and sell (write) put and call
options on foreign currencies for the purpose of protecting against declines
in the U.S. dollar value of foreign portfolio securities and against increases
in the U.S. dollar cost of foreign securities to be acquired. In addition, the
Core Fixed Income Fund may use options on currency to cross-hedge, which
involves writing or purchasing options on one currency to hedge against
changes in exchange rates for a different currency, if there is a pattern of
correlation between the two currencies. As with other kinds of option
transactions, however, the writing of an option on foreign currency will
constitute only a partial hedge, up to the amount of the premium received. If
an option that the Fund has written is exercised, the Fund could be required
to purchase or sell foreign currencies at disadvantageous exchange rates,
thereby incurring losses. The purchase of an option on foreign currency may
constitute an effective hedge against exchange rate fluctuations; however, in
the event of exchange rate movements adverse to the Fund's position, the Fund
may forfeit the entire amount of the premium plus related transaction costs.
In addition to purchasing put and call options for hedging purposes, the Fund
may purchase call or put options on currency to seek to increase total return
when the Investment Adviser anticipates that the currency will appreciate or
depreciate in value, but the securities quoted or denominated in that currency
do not present attractive investment opportunities and are not held in the
Fund's portfolio. When purchased or sold to seek to increase total return,
options on currencies are considered speculative. Options on foreign
currencies to be written or purchased by the Fund will be traded on U.S. and
foreign exchanges or over-the-counter.
 
  FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS. To seek to increase
total return or to hedge against changes in interest rates or securities
prices or, in the case of the Core Fixed Income Fund, currency exchange rates,
a Fund may purchase and sell various kinds of futures contracts, and purchase
and write call and put options on any of such futures contracts. Each Fund may
also enter into closing purchase and sale transactions with respect to any
such contracts and options. The futures contracts may be based on various
securities (such as U.S. Government Securities), foreign currencies, in the
case of the Core Fixed Income Fund, securities indices
 
                                      24
<PAGE>
 
and other financial instruments and indices. A Fund will engage in futures and
related options transactions for bona fide hedging purposes as defined in
regulations of the Commodity Futures Trading Commission or to seek to increase
total return to the extent permitted by such regulations. A Fund may not
purchase or sell futures contracts or purchase or sell related options to seek
to increase total return, except for closing purchase or sale transactions, if
immediately thereafter the sum of the amount of initial margin deposits and
premiums paid on a Fund's outstanding positions in futures and related options
entered into for the purpose of seeking to increase total return would exceed
5% of the market value of a Fund's net assets. These transactions involve
brokerage costs, require margin deposits and, in the case of contracts and
options obligating the Fund to purchase securities or currencies, require the
Fund to segregate and maintain cash or liquid assets with a value equal to the
amount of the Fund's obligations or to otherwise cover the obligations in a
manner permitted by the SEC.
 
  While transactions in futures contracts and options on futures may reduce
certain risks, such transactions themselves entail certain other risks. See
"Investment Techniques--Futures Contracts and Options on Futures Contracts" in
the Additional Statement. Thus, while a Fund may benefit from the use of
futures and options on futures, unanticipated changes in interest rates,
securities prices or currency exchange rates may result in a poorer overall
performance than if the Fund had not entered into any futures contracts or
options transactions. Because perfect correlation between a futures position
and portfolio position that is intended to be protected is impossible to
achieve, the desired protection may not be obtained and a Fund may be exposed
to risk of loss. The loss incurred by a Fund in entering into futures
contracts and in writing call options on futures is potentially unlimited and
may exceed the amount of the premium received. Futures markets are highly
volatile and the use of futures may increase the volatility of a Fund's net
asset value. The profitability of a Fund's trading in futures to seek to
increase total return depends upon the ability of the Investment Adviser to
analyze correctly the futures markets. In addition, because of the low margin
deposits normally required in futures trading, a relatively small price
movement in a futures contract may result in substantial losses to a Fund.
Further, futures contracts and options on futures may be illiquid, and
exchanges may limit fluctuations in futures contract prices during a single
day.
 
  CURRENCY SWAPS. The Core Fixed Income Fund may enter into currency swaps for
hedging purposes or to seek to increase total return. Currency swaps involve
the exchange by a Fund with another party of their respective rights to make
or receive payments in specified currencies. Currency swaps usually involve
the delivery of a gross payment stream in one designated currency in exchange
for the gross payment stream in another designated currency. Therefore, the
entire payment stream under a currency swap is subject to the risk that the
other party to the swap will default on its contractual delivery obligations.
The Fund will not enter into swap transactions unless the unsecured commercial
paper, senior debt or claims-paying ability of the other party thereto is
rated either AA or A-1 or better by S&P or Aa or P-1 or better by Moody's, or,
if unrated by such rating organizations, determined to be of comparable
quality by the Investment Adviser. The use of currency swaps is a highly
specialized activity which involves investment techniques and risks different
from those associated with ordinary portfolio securities transactions. If the
Investment Adviser is incorrect in its forecasts of currency exchange rates,
the investment performance of the Fund would be less favorable than it would
have been if this investment technique were not used.
 
  WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS. Each Fund may purchase when-
issued securities. When-issued transactions arise when securities are
purchased by a Fund with payment and delivery taking place in the future in
order to secure what is considered to be an advantageous price and yield to
the Fund at the time of entering into the transaction. Each Fund may also
purchase or sell securities on a forward commitment basis; that is, make
contracts to purchase or sell securities for a fixed price at a future date
beyond the customary three-day settlement. The purchase of securities on a
when-issued or forward commitment basis involves a risk of loss
 
                                      25
<PAGE>
 
if the value of the security to be purchased declines prior to the settlement
date. Conversely, securities sold on a forward commitment basis involve the
risk that the value of the securities to be sold may increase prior to the
settlement date. Although a Fund would generally purchase securities on a
when-issued or forward commitment basis with the intention of acquiring
securities for its portfolio, a Fund may dispose of when-issued securities or
forward commitments prior to settlement if the Investment Adviser deems it
appropriate to do so. A Fund is required to hold and maintain in a segregated
account with the Fund's custodian until three days prior to settlement date,
cash or liquid assets in an amount sufficient to meet the purchase price.
Alternatively, each Fund may enter into offsetting contracts for the forward
sale of other securities that it owns.
 
  ILLIQUID AND RESTRICTED SECURITIES. A Fund may not invest more than 15% of
its net assets in illiquid investments, which include securities (both foreign
and domestic) that are not readily marketable, certain SMBS, certain municipal
leases and participation interests, repurchase agreements maturing in more
than seven days, time deposits with a notice or demand period of more than
seven days, certain over-the-counter options, and certain restricted
securities, unless it is determined, based upon the continuing review of the
trading markets for a specific restricted security, that such restricted
security is eligible for resale under Rule 144A under the Securities Act of
1933 and, therefore, is liquid. The Trustees have adopted guidelines under
which the Investment Adviser determines and monitors the liquidity of
portfolio securities subject to the oversight of the Trustees. Investing in
restricted securities eligible for resale pursuant to Rule 144A may decrease
the liquidity in a Fund to the extent that qualified institutional buyers
become for a time uninterested in purchasing these restricted securities. The
purchase price and subsequent valuation of restricted and illiquid securities
normally reflect a discount, which may be significant, from the market price
of comparable securities for which a liquid market exists.
 
  REPURCHASE AGREEMENTS. Each Fund may enter into repurchase agreements with
dealers in U.S. Government Securities and member banks of the Federal Reserve
System which furnish collateral at least equal in value or market price to the
amount of their repurchase obligation. Core Fixed Income Fund may also enter
into repurchase agreements involving certain foreign government securities. If
the other party or "seller" defaults, a Fund might suffer a loss to the extent
that the proceeds from the sale of the underlying securities and other
collateral held by the Fund in connection with the related repurchase
agreement are less than the repurchase price. In addition, in the event of
bankruptcy of the seller or failure of the seller to repurchase the securities
as agreed, a Fund could suffer losses, including loss of interest on or
principal of the security and costs associated with delay and enforcement of
the repurchase agreement. The Trustees have reviewed and approved certain
counterparties whom they believe to be creditworthy and have authorized the
Funds to enter into repurchase agreements with such counterparties. In
addition, each Fund, together with other registered investment companies
having management agreements with the Investment Adviser, may transfer
uninvested cash balances into a single joint account, the daily aggregate
balance of which will be invested in one or more repurchase agreements.
 
  TEMPORARY INVESTMENTS. Each Fund may, for temporary defensive purposes,
invest up to 100% of its total assets in (i) U. S. Government Securities or
(ii) repurchase agreements collateralized by U.S. Government Securities. The
Short Duration Tax-Free Fund may for temporary defensive purposes depart from
its stated investment objectives and invest more than 20% of its net assets in
taxable investments.
 
MISCELLANEOUS TECHNIQUES
 
  In addition to the techniques and investments described above, each Fund
may, with respect to no more than 5% of its net assets, engage in the
following techniques and investments: (i) portfolio securities lending, (ii)
mortgage swaps (other than Short Duration Tax-Free Fund), interest rate swaps,
caps, floors and collars and credit swaps, (iii) inverse floating rate
securities, (iv) yield curve options, (v) investments in other investment
 
                                      26
<PAGE>
 
companies, (vi) custodial receipts, (vii) with respect to the Short Duration
Tax-Free Fund, tender option bonds and standby commitments and (viii) reverse
repurchase agreements for investment purposes.
 
  In addition, each Fund may borrow up to 33 1/3% of its total assets from
banks for temporary or emergency purposes. A Fund may not make additional
investments if borrowings (excluding covered mortgage dollar rolls) exceed 5%
of its total assets. For more information, see the Additional Statement.
 
 
                            INVESTMENT RESTRICTIONS
 
 
  Each Fund is subject to certain investment restrictions that are described
in detail under "Investment Restrictions" in the Additional Statement.
Fundamental investment restrictions of a Fund cannot be changed without
approval of a majority of the outstanding shares of that Fund as defined in
the Additional Statement. Each Fund's investment objectives and all policies
not specifically designated as fundamental are non-fundamental and may be
changed without shareholder approval. If there is a change in a Fund's
investment objectives, shareholders should consider whether that Fund still
remains an appropriate investment in light of their then current financial
positions and needs.
 
  The Short Duration Tax-Free Fund's policy to invest, under normal market
conditions, at least 80% of its net assets in Municipal Securities, the
interest on which is exempt from regular federal income tax, is fundamental
and may not be changed without shareholder approval. For more information on a
Fund's investment restrictions, an investor should obtain the Additional
Statement.
 
 
                              PORTFOLIO TURNOVER
 
 
  Each Fund may engage in active short-term trading to benefit from yield
disparities among different issues of securities or among the markets for
fixed-income securities, or for other reasons. It is anticipated that the
portfolio turnover rate of each Fund will vary from year to year. The
portfolio turnover rate is computed by dividing the lesser of the dollar
amount of securities purchased or securities sold (excluding all securities
whose maturities at acquisition are one year or less) by the average monthly
value of such securities owned during the year. A 100% turnover rate would
occur, for example, if all of the securities held by a Fund were sold and
replaced within one year. The Investment Adviser will not consider the
portfolio turnover rate a limiting factor in making investment decisions for a
Fund consistent with the Fund's investment objectives and portfolio management
policies. A high rate of portfolio turnover results in increased transaction
costs to a Fund. The portfolio turnover rate includes the effect of entering
into mortgage dollar rolls. See "Financial Highlights" for a statement of each
Fund's historical portfolio turnover rates.
 
 
                                  MANAGEMENT
 
 
TRUSTEES AND OFFICERS
 
  The Trustees are responsible for deciding matters of general policy and
reviewing the actions of the Investment Advisers, distributor and transfer
agent. The officers of the Trust conduct and supervise each Fund's
 
                                      27
<PAGE>
 
daily business operations. The Additional Statement contains information as to
the identity of, and other information about, the Trustees and officers of the
Trust.
 
INVESTMENT ADVISERS
 
  INVESTMENT ADVISERS. Goldman Sachs Funds Management, L.P., One New York
Plaza, New York, New York 10004, a Delaware limited partnership which is an
affiliate of Goldman Sachs, serves as investment adviser to the Short Duration
Government and Adjustable Rate Government Funds. Goldman Sachs Funds
Management, L.P. registered as an investment adviser in 1990. Goldman Sachs
Asset Management, One New York Plaza, New York, New York 10004, a separate
operating division of Goldman Sachs, serves as the investment adviser to the
Short Duration Tax-Free and Core Fixed Income Funds. Goldman Sachs registered
as an investment adviser in 1981. The Goldman Sachs Group, L.P., which
controls the Investment Advisers, has announced that it will pursue an initial
public offering of the firm during the fourth quarter of 1998; if the public
offering is consummated, The Goldman Sachs Group, L.P. will merge into the new
public company, which will be called The Goldman Sachs Group, Inc. As of July
24, 1998, GSAM and GSFM, together with their affiliates, acted as investment
adviser or distributor for assets in excess of $168 billion.
 
  Under a Management Agreement with each Fund, the applicable Investment
Adviser, subject to the general supervision of the Trustees, provides day-to-
day advice as to the Fund's portfolio transactions. Goldman Sachs has agreed
to permit the Trust to use the name "Goldman Sachs" or a derivative thereof as
part of each Fund's name for as long as a Fund's Management Agreement is in
effect.
 
  In performing its investment advisory services, each Investment Adviser,
while remaining ultimately responsible for the management of the Funds, is
able to draw upon the research and expertise of its asset management
affiliates for portfolio decisions and management with respect to certain
portfolio securities. In addition, the Investment Advisers will have access to
the research of, and certain proprietary technical models developed by,
Goldman Sachs and may apply quantitative and qualitative analysis in
determining the appropriate allocations among the categories of issuers and
types of securities.
 
  Under the Management Agreement, each Investment Adviser also: (i) supervises
all non-advisory operations of each Fund that it advises; (ii) provides
personnel to perform such executive, administrative and clerical services as
are reasonably necessary to provide effective administration of each Fund;
(iii) arranges for at each Fund's expense (a) the preparation of all required
tax returns, (b) the preparation and submission of reports to existing
shareholders, (c) the periodic updating of prospectuses and Additional
Statements and (d) the preparation of reports to be filed with the SEC and
other regulatory authorities; (iv) maintains each Fund's records; and (v)
provides office space and all necessary office equipment and services.
 
  ADJUSTABLE RATE GOVERNMENT AND SHORT DURATION GOVERNMENT FUNDS. The Funds'
portfolio managers are Jonathan A. Beinner, Richard C. Lucy, James B. Clark,
Peter D. Dion and James P. McCarthy. Their responsibilities include investing
in the particular types of securities the Funds may hold. Mr. Beinner is a
Managing Director of Goldman Sachs and Co-Head of GSAM's U.S. Fixed Income
Department. Mr. Beinner joined the Investment Adviser in 1990. Mr. Lucy is a
Vice President of Goldman Sachs and Co-Head of GSAM's U.S. Fixed Income
Department. Mr. Lucy joined the Investment Adviser in 1992. Mr. Clark joined
GSAM in 1994 after working as a senior trader at the Federal Home Loan
Mortgage Corporation. Prior to that, he was an investment manager at Travelers
Insurance Company. Mr. Dion is a Vice President of Goldman Sachs and joined
GSAM in 1992. Mr. McCarthy is a Vice President of Goldman Sachs. Mr. McCarthy
joined GSAM in 1995 after working as a bond trader at Nomura Securities.
 
  CORE FIXED INCOME FUND. The Fund's portfolio managers are Jonathan A.
Beinner and Richard C. Lucy. See above for information about Mr. Beinner and
Mr. Lucy. Messrs. Beinner and Lucy each specialize in investing in a
particular type of security the Fund may hold.
 
                                      28
<PAGE>
 
  SHORT DURATION TAX-FREE FUND. The Fund's portfolio managers are Benjamin S.
Thompson and Elisabeth Schupf Lonsdale. Mr. Thompson and Ms. Lonsdale each
specialize in municipal securities. Mr. Thompson's responsibilities include
developing investment strategy and structuring portfolios. Ms. Lonsdale is
also responsible for GSAM's municipal credit research. Mr. Thompson worked in
the institutional sales and marketing group at GSAM until he joined the fixed-
income team in 1993. Prior to joining GSAM in early 1992, Mr. Thompson worked
in the Structured Finance Group of the Chase Manhattan Bank. Before rejoining
Goldman Sachs in 1995, Ms. Lonsdale was a Director of Fitch Investors Service
evaluating the credit ratings of tax-backed issues. Prior to that, she worked
for ten years in Goldman Sachs's Municipal Finance Department.
 
  It is the responsibility of the Investment Adviser to make the investment
decisions for a Fund and to place the purchase and sale orders for a Fund's
portfolio transactions in U.S. and foreign markets. Such orders may be
directed to any broker including, to the extent and in the manner permitted by
applicable law, Goldman Sachs or its affiliates. In effecting purchases and
sales of portfolio securities for the Funds, the Investment Advisers will seek
the best price and execution of a Fund's orders. In doing so, where two or
more brokers or dealers offer comparable prices and execution for a particular
trade, consideration may be given to whether the broker or dealer provides
investment research or brokerage services or sells shares of any Goldman Sachs
Fund. See the Additional Statement for a further description of the Investment
Advisers' brokerage allocation practices.
 
  As compensation for its services rendered and assumption of certain expenses
pursuant to separate Management Agreements, GSAM and GSFM are entitled to the
following fees, computed daily and payable monthly at the annual rates listed
below:
 
<TABLE>
<CAPTION>
                                              FOR THE FISCAL
                                              YEAR OR PERIOD
                                 CONTRACTUAL       ENDED             AS OF
                                    RATE*    OCTOBER 31, 1997* SEPTEMBER 1, 1998
                                 ----------- ----------------- -----------------
<S>                              <C>         <C>               <C>
GSAM
- ----
  Short Duration Tax-Free.......    0.40%          0.40%             0.35%
  Core Fixed Income.............    0.40%          0.40%             0.40%
GSFM
- ----
  Adjustable Rate Government....    0.40%          0.40%             0.40%
  Short Duration Government.....    0.50%          0.40%             0.50%
</TABLE>
- --------
* The difference, if any, between the stated fees and the actual fees paid by
  the Funds reflects that the applicable Investment Adviser did not charge the
  full amount of the fees to which it would have been entitled for the year
  ended October 31, 1997. The Investment Adviser may discontinue or modify any
  limitations in the future at its discretion.
 
  The Investment Adviser has voluntarily agreed to reduce or limit certain
"Other Expenses" of the Funds, (excluding management fees, transfer agency
fees, administration fees, taxes, interest and brokerage fees and litigation,
indemnification and other extraordinary expenses) to the extent such expenses
exceed 0.05%, 0.00%, 0.00% and 0.10% per annum of the average daily net assets
of the Adjustable Rate Government, Short Duration Government, Short Duration
Tax Free and Core Fixed Income Funds, respectively. Such reductions or limits,
if any, may be discontinued or modified by the applicable Investment Adviser
in its discretion at any time.
 
  ACTIVITIES OF GOLDMAN SACHS AND ITS AFFILIATES AND OTHER ACCOUNTS MANAGED BY
GOLDMAN SACHS. The involvement of the Investment Advisers, Goldman Sachs and
their affiliates in the management of, or their
 
                                      29
<PAGE>
 
interest in, other accounts and other activities of Goldman Sachs may present
conflicts of interest with respect to a Fund or limit a Fund's investment
activities. Goldman Sachs and its affiliates engage in proprietary trading and
advise accounts and funds which have investment objectives similar to those of
the Funds and/or which engage in and compete for transactions in the same
types of securities, currencies and instruments as the Funds. Goldman Sachs
and its affiliates will not have any obligation to make available any
information regarding their proprietary activities or strategies, or the
activities or strategies used for other accounts managed by them, for the
benefit of the management of the Funds. The results of a Fund's investment
activities, therefore, may differ from those of Goldman Sachs and its
affiliates and it is possible that a Fund could sustain losses during periods
in which Goldman Sachs and its affiliates and other accounts achieve
significant profits on their trading for proprietary or other accounts. In
addition, the Funds may, from time to time, enter into transactions in which
other clients of Goldman Sachs have an adverse interest. From time to time, a
Fund's activities may be limited because of regulatory restrictions applicable
to Goldman Sachs and its affiliates, and/or their internal policies designed
to comply with such restrictions. See "Management -- Activities of Goldman
Sachs and its Affiliates and Other Accounts Managed by Goldman Sachs" in the
Additional Statement for further information.
 
DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs, 85 Broad Street, New York, New York 10004, serves as the
exclusive distributor (the "Distributor") of each Fund's shares. Goldman
Sachs, 4900 Sears Tower, Chicago, Illinois 60606 also serves as each Fund's
transfer agent (the "Transfer Agent") and as such performs various shareholder
servicing functions. Shareholders with inquiries regarding any Fund should
contact Goldman Sachs (as Transfer Agent) at the address or the telephone
number set forth on the back cover page of this Prospectus. Goldman Sachs is
entitled to receive a transfer agency fee with respect to each Fund's
Administration shares equal, on an annual basis, to 0.04% of average daily net
assets.
 
  From time to time, Goldman Sachs or any of its affiliates may purchase and
hold shares of the Funds. Goldman Sachs reserves the right to redeem at any
time some or all of the shares acquired for its own account.
 
YEAR 2000
 
  Many computer systems were designed using only two digits to signify the
year (for example, "98" for "1998"). On January 1, 2000, if these computer
systems are not corrected, they may incorrectly interpret "00" as the year
"1900" rather than the year "2000," leading to computer shutdowns or errors
(commonly known as the "Year 2000 Problem"). To the extent these systems
conduct forward-looking calculations, these computer problems may occur prior
to January 1, 2000. Like other investment companies and financial and business
organizations, the Funds could be adversely affected in their ability to
process securities trades, price securities, provide shareholder account
services and otherwise conduct normal business operations if the computer
systems used by the Investment Adviser or other Fund service providers do not
adequately address this problem in a timely manner. The Investment Adviser has
established a dedicated group to analyze these issues and to implement the
systems modifications necessary to prepare for the Year 2000 Problem.
Currently, the Investment Adviser does not anticipate that the transition to
the 21st century will have any material impact on its ability to continue to
service the Funds at current levels. In addition, the Investment Adviser has
sought assurances from the Funds' other service providers that they are taking
the steps necessary so that they do not experience Year 2000 Problems, and the
Investment Adviser will continue to monitor the situation. At this time,
however, no assurance can be given that the actions taken by the Investment
Adviser and the Funds' other service providers will be sufficient to avoid any
adverse effect on the Funds due to the Year 2000 Problem.
 
 
                                      30
<PAGE>
 
 
                                   DIVIDENDS
 
 
  Each Fund will declare a daily dividend which will be paid monthly. Over the
course of the fiscal year, dividends accrued and paid will constitute all or
substantially all of the Funds' net investment income. From time to time a
portion of such dividends may constitute a return of capital. In the case of
Core Fixed Income Fund, net loss, if any, from certain foreign currency
transactions or instruments that is otherwise taken into account in
calculating net investment income or net realized capital gains for accounting
purposes may not be taken into account in determining the amount of dividends
to be declared and paid, with the result that a portion of the Fund's
dividends may be treated as a return of capital, nontaxable to the extent of a
shareholder's tax basis in his shares. The Funds also intend that all net
realized capital gains will be declared as a dividend at least annually. In
determining amounts of capital gains to be distributed, capital losses,
including any available capital loss carryovers from prior years, will be
offset against capital gains.
 
  A Fund's net investment income is determined on a daily basis. On days on
which net asset value is calculated, such determination is made immediately
prior to the calculation of a Fund's net asset value. On days on which net
asset value is not calculated, such determination is made as of 3:00 p.m.
Chicago time.
 
  Payment of dividends from net investment income will be made on the last
calendar day of each month in additional shares of the Fund at the net asset
value on such day, unless cash distributions are elected, in which case, cash
payment will be made on the first Business Day of the succeeding month.
Payment of dividends with respect to capital gains, if any, when declared will
be made in additional shares of the Fund at the net asset value on the payment
date, unless cash distributions are elected. This election to receive
dividends in cash is initially made on the Account Information Form and may be
changed upon written notice to the Transfer Agent at any time prior to the
record date for a particular dividend or distribution. If cash dividends are
elected with respect to the Fund's monthly net investment income dividends,
then cash dividends must also be elected with respect to the non-long-term
capital gains component, if any, of the Fund's annual dividend.
 
  At the time of an investor's purchase of shares of a Fund, a portion of the
net asset value per share may be represented by realized or unrealized
appreciation of any Fund's portfolio securities. Therefore, subsequent
distributions on such shares from such income or realized appreciation may be
taxable to the investor even if the net asset value of the shares is, as a
result of the distributions, reduced below the cost of such shares and the
distributions (or portions thereof) represent a return of a portion of the
purchase price.
 
 
                                   EXPENSES
 
 
  The Funds are responsible for the payment of their expenses. The expenses
include, without limitation; fees payable to the Investment Adviser;
administration fees; custodian and transfer agency fees; brokerage fees and
commissions; filing fees for the registration or qualification of the Funds'
shares under federal or state securities laws, organizational expenses; fees
and expenses incurred in connection with membership in investment company
organizations; taxes; interest; costs of liability insurance, fidelity bonds
or indemnification; any costs, expenses or losses arising out of any liability
of, or claim for damages or other relief asserted against, the Funds for
violation of any law; legal and auditing fees and expenses (including the cost
of legal and certain accounting services rendered by employees of the
Investment Adviser and its affiliates with respect to the Funds); expenses of
preparing and setting in type prospectuses, Additional Statements, proxy
material, reports and notices and the
 
                                      31
<PAGE>
 
printing and distributing of the same to shareholders and regulatory
authorities; compensation and expenses of the Trust's "non-interested"
Trustees; and extraordinary expenses, if any, incurred by the Trust.
 
 
                                NET ASSET VALUE
 
 
  The net asset value per share of each class of a Fund is calculated by the
Fund's custodian as of the close of regular trading on the New York Stock
Exchange (normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m. New York
time) on each Business Day (as such term is defined under "Additional
Information") immediately after the determination, if any, of the income to be
declared as a dividend. Net asset value per share of each class is calculated
by determining the net assets of each class and dividing by the number of
outstanding shares of that class.
 
  Each Fund's portfolio securities for which accurate market quotations are
readily available are valued on the basis of quotations, which may be
furnished by a pricing service or provided by dealers in such securities and
other portfolio securities are valued at fair value, based on yield
equivalents, a pricing matrix or other sources, under valuation procedures
established by the Trustees. Debt obligations with a remaining maturity of 60
days or less are valued at amortized cost. The Board of Trustees has
determined that the amortized cost of such securities approximates fair market
value.
 
 
                            PERFORMANCE INFORMATION
 
 
  From time to time each Fund may publish yield, distribution rate and average
annual total return and the Short Duration Tax-Free Fund may publish its tax
equivalent yield in advertisements and communications to shareholders or
prospective investors. Average annual total return is determined by computing
the average annual percentage change in value of $1,000 invested at the
maximum public offering price for specified periods ending with the most
recent calendar quarter, assuming reinvestment of all dividends and
distributions at net asset value. The total return calculation assumes a
complete redemption of the investment at the end of the relevant period. Each
Fund may also from time to time advertise total return on a cumulative,
average, year-by-year or other basis for various specified periods by means of
quotations, charts, graphs or schedules. In addition to the above, each Fund
may from time to time advertise its performance relative to certain averages,
performance rankings, indices, other information prepared by recognized mutual
fund statistical services and investments for which reliable performance
information is available.
 
  Yield is computed by dividing net investment income earned during a recent
thirty-day period by the product of the average daily number of shares
outstanding and entitled to receive dividends during the period and the
maximum offering price per share on the last day of the relevant period. The
results are compounded on a bond equivalent (semiannual) basis and then
annualized. Net investment income per share is equal to the dividends and
interest earned during the period, reduced by accrued expenses for the period.
The calculation of net investment income for these purposes may differ from
the net investment income determined for accounting purposes.
 
  Tax equivalent yield represents the yield an investor would have to earn to
equal, after taxes, the Short Duration Tax-Free Fund's tax-free yield. Tax
equivalent yield is calculated by dividing the Short Duration Tax-Free Fund's
tax-exempt yield by one minus a stated federal tax rate.
 
                                      32
<PAGE>
 
  Quotations of distribution rates are calculated by annualizing the most
recent distribution of net investment income for a monthly, quarterly or other
relevant period and dividing this amount by the net asset value per share or
maximum public offering price on the last day of the period for which the
distribution rates are being calculated.
 
  Each Fund's yield, total return and distribution rate will be calculated
separately for each class of shares in existence. Because each class of shares
may be subject to different expenses, the yield, total return and distribution
rate calculations with respect to each class of shares for the same period
will differ. See "Shares of the Trust."
 
  Each Fund's performance quotations do not reflect any fees charged by a
Service Organization to its customer accounts in connection with investments
in the Funds. The investment results of a Fund will fluctuate over time and
any presentation of investment results for any prior period should not be
considered a representation of what an investment may earn or what the Fund's
performance may be in any future period. In addition to information provided
in shareholder reports, the Funds may, in their discretion, from time to time,
make a list of their holdings available to investors upon request.
 
 
                              SHARES OF THE TRUST
 
 
  Each Fund is a series of the Goldman Sachs Trust, which was formed under the
laws of the State of Delaware on January 28, 1997. The Funds were formerly
series of Goldman Sachs Trust, a Massachusetts business trust, and were
reorganized into the Trust as of April 30, 1997. The Trustees have authority
under the Trust's Declaration of Trust to create and classify shares of
beneficial interest in separate series, without further action by
shareholders. Additional series may be added in the future. The Trustees also
have authority to classify or reclassify any series or portfolio of shares
into one or more classes.
 
  When issued, shares are fully paid and non-assessable. In the event of
liquidation, shareholders are entitled to share pro rata in the net assets of
the applicable Fund available for distribution to such shareholders. All
shares are freely transferable and have no preemptive, subscription or
conversion rights. Shareholders are entitled to one vote per share, provided
that at the option of the Trustees, shareholders will be entitled to a number
of votes based upon the net asset values represented by their shares.
 
  The Trust does not intend to hold annual meetings of shareholders. However,
recordholders may, under certain circumstances, as permitted by the Act,
communicate with other shareholders in connection with requiring a special
meeting of shareholders. The Trustees will call a special meeting of
shareholders for the purpose of electing Trustees, if, at any time, less than
a majority of Trustees holding office at the time were elected by
shareholders.
 
  In the interest of economy and convenience, the Trust does not issue
certificates representing the Fund's shares. Instead, the Transfer Agent
maintains a record of each shareholder's ownership. Each shareholder of record
receives confirmation of purchase and redemption orders from the Transfer
Agent. Fund shares and any dividends and distributions paid by the Funds are
reflected in account statements from the Transfer Agent.
 
  As of February 1, 1998, the shareholder listed below owned beneficially and
of record 25% or more of the outstanding shares of the following Fund: Short
Duration Government Fund--State Street Bank and Trust Company, P.O. Box 1992,
Boston, MA 02105-1992 (29.64%).
 
 
                                      33
<PAGE>
 
 
                                   TAXATION
 
 
FEDERAL TAXES
 
  Each Fund is treated as a separate entity for tax purposes, has elected to
be treated as a regulated investment company and intends to qualify for such
treatment for each taxable year under Subchapter M of the Code. To qualify as
such, a Fund must satisfy certain requirements relating to the sources of its
income, diversification of its assets and distribution of its income to
shareholders. As a regulated investment company, a Fund will not be subject to
federal income or excise tax on any net investment income and net realized
capital gains that are distributed to its shareholders in accordance with
certain timing requirements of the Code.
 
  The Short Duration Tax-Free Fund intends to satisfy certain requirements of
the Code so that it may distribute the tax-exempt interest it receives as
"exempt-interest dividends," as defined in the Code. If such requirements are
satisfied, distributions of the Short Duration Tax-Free Fund that are
attributable to interest on tax-exempt obligations and that the Fund properly
designates as exempt-interest dividends will be exempt from regular federal
income tax, although all or a portion of these distributions may be subject to
the federal alternative minimum tax and may be includable in the tax base for
determining taxability of social security or railroad retirement benefits.
Persons who are "substantial users" (or related persons to such substantial
users) of facilities financed by industrial development or certain private
activity bonds should consult their own tax advisers before purchasing shares
of the Short Duration Tax-Free Fund. Interest on indebtedness incurred or
continued to purchase or carry shares of the Short Duration Tax-Free Fund is
not deductible to the extent attributable to the Short Duration Tax-Free
Fund's distributions that are exempt-interest dividends.
 
  Dividends paid by a Fund from net investment income, certain net realized
foreign exchange gains, the excess of net short-term capital gain over net
long-term capital loss and original issue discount or market discount income
will be taxable to shareholders as ordinary income, except for any exempt-
interest dividends paid by Short Duration Tax-Free Fund, as described above.
Distributions out of the net capital gain (the excess of net long-term capital
gain over net short-term capital loss), if any, of a Fund, will be taxed to
shareholders as long-term capital gains, regardless of the length of time a
shareholder has held his or her shares or whether such gain was reflected in
the price paid for the shares. These tax consequences will apply whether
distributions are received in cash or reinvested in shares. Certain
distributions paid by a Fund in January of a given year may be taxable to
shareholders as if received the prior December 31. Shareholders will be
informed annually about the amount and character of distributions received
from the Funds for federal income tax purposes.
 
  Investors should consider the tax implications of buying shares immediately
prior to a distribution. Investors who purchase shares shortly before the
record date for a distribution other than a daily dividend will pay a per
share price that includes the value of the anticipated distribution and will
be taxed on any taxable distribution even though the distribution represents a
return of a portion of the purchase price.
 
  Redemptions and exchanges of shares are taxable events.
 
  Individuals and certain other classes of shareholders may be subject to 31%
backup withholding of federal income tax on distributions (other than exempt-
interest dividends), redemptions and exchanges if they fail to furnish their
correct taxpayer identification number and certain certifications required by
the Internal Revenue Service or if they are otherwise subject to backup
withholding. Individuals, corporations and other shareholders
 
                                      34
<PAGE>
 
that are not U.S. persons under the Code are subject to different tax rules
and may be subject to non-resident alien withholding at the rate of 30% (or a
lower rate provided by an applicable tax treaty) on amounts treated as
ordinary dividends from the Funds.
 
  The Core Fixed Income Fund may be subject to foreign withholding or other
foreign taxes on income or gain from certain foreign securities. In general,
the Fund does not anticipate that it will be eligible to pass any foreign tax
credits through to its shareholders; however, the Fund may deduct these taxes
in computing its taxable income, if any.
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local
or foreign taxes on payments received from the Funds, including exempt-
interest dividends. A state income (and possibly local income and/or
intangible property) tax exemption is generally available to the extent (if
any) a Fund's distributions are derived from interest on (or, in the case of
intangible property taxes, the value of its assets is attributable to) certain
U.S. government obligations and/or tax-exempt municipal obligations issued by
or on behalf of the particular state or a political subdivision thereof,
provided in some states that certain thresholds for holdings of such
obligations and/or reporting requirements are satisfied. For a further
discussion of certain tax consequences of investing in shares of the Funds,
see "Taxation" in the Additional Statement. Shareholders are urged to consult
their own tax advisers regarding specific questions as to federal, state and
local taxes as well as to any foreign taxes.
 
 
                            ADDITIONAL INFORMATION
 
 
  As used in this Prospectus, the term "Business Day" means any day the New
York Stock Exchange is open for trading, which is Monday through Friday except
for holidays. The New York Stock Exchange is closed on the following holidays:
New Year's Day, Martin Luther King, Jr. Day, Presidents' Day (observed), Good
Friday, Memorial Day (observed), Independence Day, Labor Day, Thanksgiving Day
and Christmas Day.
 
 
                              ADMINISTRATION PLAN
 
 
  The Trust, on behalf of the Funds, has adopted an Administration Plan with
respect to the Administration Shares which authorizes a Fund to compensate
certain institutions ("Service Organizations") for providing account
administration services to their customers who are beneficial owners of such
Shares. The Trust, on behalf of the Funds, enters into agreements with Service
Organizations which purchase Administration Shares on behalf of their
customers ("Service Agreements"). The Service Agreements provide for
compensation to the Service Organizations in an amount up to 0.25% (on an
annualized basis) of the average daily net assets of the Administration Shares
of the Fund attributable to or held in the name of the Service Organization
for its customers. The services provided by the Service Organizations may
include acting, directly or through an agent, as the sole shareholder of
record, maintaining account records for customers and processing orders to
purchase, redeem or exchange Administration Shares for customers.
 
  The Trust may authorize certain Service Organizations to accept on the
Trust's behalf orders placed by their customers and, if approved by the Trust,
to designate other intermediaries to accept such orders. In these cases, a
 
                                      35
<PAGE>
 
Fund will be deemed to have received an order in proper form when the order is
accepted by the authorized Service Organization or intermediary on a Business
Day, and the order will be priced at a Fund's net asset value per share next
determined after such acceptance. The Service Organization or intermediary
will be responsible for transmitting accepted orders to the Trust within the
period agreed upon by them. A customer may contact its Service Organization to
learn whether the Service Organization is authorized to accept orders. Service
Organizations that are authorized to accept orders for the Trust may receive
payments from the Funds or Goldman Sachs that are in addition to the payments
payable by the Trust under the Administration Plan.
 
  Holders of Administration Shares of a Fund bear all expenses and fees paid
to Service Organizations under the Administration Plan as well as any other
expenses which are attributed to such Shares.
 
  Service Organizations may charge other fees to their customers who are the
beneficial owners of Administration Shares in connection with their customer
accounts. These fees would be in addition to any amounts received by the
Service Organization under a Service Agreement and may affect the return
earned on an investment in the Fund. The Trust, on behalf of the Funds,
accrues payments made pursuant to a Service Agreement daily. All inquiries of
beneficial owners of Administration Shares should be directed to the owners'
Service Organizations.
 
  For the fiscal year ended October 31, 1997, the Trust, on behalf of each
Fund, paid Service Organizations fees at the annual rate of 0.25% of each
Fund's average daily net assets attributable to Administration Shares.
 
 
                            REPORTS TO SHAREHOLDERS
 
 
  Recordholders of Administration Shares of the Funds will receive an annual
report containing audited financial statements and a semiannual report. Each
recordholder of Administration Shares will also be provided with a printed
confirmation for each transaction in its account and a monthly account
statement. A year-to-date statement for any account will be provided to a
Service Organization upon request made to Goldman Sachs.
 
  Service Organizations will be responsible for providing services similar to
those described above to their customers who are the beneficial owners of such
Shares. For example, Service Organizations are responsible for providing each
customer exercising investment discretion with monthly statements with respect
to such customer's account in lieu of an immediate confirmation of each
transaction.
 
 
                       PURCHASE OF ADMINISTRATION SHARES
 
 
  Customers of Service Organizations may invest in Administration Shares only
through their Service Organizations. Administration Shares may be purchased on
any Business Day at the net asset value per share next determined after
receipt of an order by Goldman Sachs from a Service Organization. (See
"Administration Plan" for a description of limited situations where a Service
Organization or other intermediary may be authorized to accept orders for the
Funds.) No sales load will be charged. Currently, net asset value is
determined as of the close of regular trading on the New York Stock Exchange
(normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m. New York time),
as described under "Net Asset Value." Purchases of Administration Shares of
the Funds must be settled within three (3) Business Days of the receipt of a
complete purchase order. Payment
 
                                      36
<PAGE>
 
of the proceeds of redemption of shares purchased by check may be delayed for
a period of time as described under "Redemption of Administration Shares."
 
  The Service Organizations are responsible for the timely transmittal of
purchase orders to Goldman Sachs and payments to Northern or Goldman Sachs. In
order to facilitate timely transmittal, the Service Organizations have
established times by which purchase orders and payments must be received by
them.
 
PURCHASE PROCEDURES
 
  Purchases of Administration Shares by a Service Organization may be made by
placing an order with Goldman Sachs at 800-621-2550 and either wiring federal
funds to the Northern Trust Company ("Northern") as subcustodian for State
Street Bank and Trust Company ("State Street") on the next Business Day or
initiating an ACH transfer to ensure receipt by Northern on the next Business
Day. Purchases may also be made by a Service Organization by check (except
that the Trust will not accept a check drawn on a foreign bank or a third-
party check) or Federal Reserve draft made payable to Goldman Sachs Fixed
Income Funds -- Name of Fund and Class of shares and should be directed to
Goldman Sachs Fixed Income Funds -- Name of Fund and Class of shares, c/o GSAM
Shareholder Services, 4900 Sears Tower, Chicago, Illinois 60606.
 
OTHER PURCHASE INFORMATION
 
  The Funds do not have any minimum purchase or account requirements with
respect to Administration Shares. A Service Organization may, however, impose
a minimum amount for initial and subsequent investments in Administration
Shares, and may establish other requirements such as a minimum required
account balance. A Service Organization may effect redemptions of noncomplying
accounts, and may impose a charge for any special services rendered to its
customers. Customers should contact their Service Organizations for further
information concerning such requirements and charges.
 
    PURCHASE BY FEDERAL FUNDS WIRE OR ACH TRANSFER. If a purchase order is
  received with a specified settlement date from a Service Organization in
  proper form before the determination of net asset value that day and
  payment is made by wire transfer or ACH transfer, shares will be issued and
  dividends will begin to accrue on the purchased shares on the later of (i)
  the Business Day after receipt of the purchase order or (ii) the day of
  receipt of a federal funds wire or an ACH transfer by Northern. For
  purchases without a specified settlement date, shares will be issued and
  dividends declared with respect to such shares will begin to accrue on the
  Business Day after payment is so received.
 
    PURCHASE BY CHECK OR FEDERAL RESERVE DRAFT. If a purchase order is
  received with a specified settlement date from a Service Organization in
  proper form before the determination of net asset value that day and
  payment is made by check or Federal Reserve draft, shares will be issued
  and dividends will begin to accrue on the purchased shares on the Business
  Day after the date payment is received. For purchases without a specified
  settlement date, shares will be issued and dividends declared with respect
  to such shares will begin to accrue on the Business Day after payment is so
  received.
 
  The Investment Advisers, Distributor, and/or their affiliates also pay
additional compensation, from time to time, out of their assets and not as an
additional charge to the Funds, to selected Service Organizations and other
persons in connection with the sale of shares of the Funds and other
investment portfolios of the Trust (such as additional payments based on new
sales, amounts exceeding pre-established thresholds, or the length of time
customers' assets have remained in the Trust) and, subject to applicable NASD
regulations, contribute to various non-cash and cash incentive arrangements to
promote the sale of shares, as well as sponsor various educational
 
                                      37
<PAGE>
 
programs, sales contests and/or promotions in which participants may receive
reimbursement of expenses, entertainment and prizes such as travel awards,
merchandise, cash, investment research and educational information and related
support materials. This additional compensation can vary among Service
Organizations depending upon such factors as the amounts their customers have
invested (or may invest) in particular investment portfolios of the Trust, the
particular program involved, or the amount of reimbursable expenses.
Additional compensation based on sales may, but is currently not expected to,
exceed 0.50% (annualized) of the amount invested. For further information, see
the Additional Statement.
 
  The Funds reserve the right to redeem Administration Shares of any Service
Organization whose account balance is less than $50 as a result of earlier
redemptions. Such redemptions will not be implemented if the value of a
recordholder's account falls below the minimum account balance solely as a
result of market conditions. A Fund will give sixty (60) days' prior written
notice to Service Organizations whose Administration Shares are being redeemed
to allow them to purchase sufficient additional Administration Shares to avoid
such redemption.
 
  The Funds and Goldman Sachs each reserves the right to reject any specific
purchase order (including exchanges) or to restrict purchases or exchanges by
a particular purchaser (or group of related purchasers). This may occur, for
example, when a purchaser or group of purchasers' pattern of frequent
purchases, sales or exchanges of Administration Shares of a Fund is evident,
or if purchases, sales or exchanges are, or a subsequent abrupt redemption
might be, of a size that would disrupt management of a Fund.
 
  In the sole discretion of Goldman Sachs, a Fund may accept securities
instead of cash for the purchase of shares of the Fund. Such purchases will be
permitted only if the Investment Adviser determines that any securities
acquired in this manner are consistent with the Fund's investment objectives,
restrictions and policies and are desirable investments for the Fund.
 
 
                              EXCHANGE PRIVILEGE
 
 
  Administration Shares of the Funds may be exchanged by a Service
Organization for (i) Administration Shares of any other mutual fund sponsored
by Goldman Sachs and designated as an eligible fund for this purpose and (ii)
the corresponding class of any Goldman Sachs Money Market Fund at the net
asset value next determined either by writing to Goldman Sachs, Attention:
Goldman Sachs Fixed Income Funds -- Name of Fund and Class of shares, c/o GSAM
Shareholder Services, 4900 Sears Tower, Chicago, Illinois 60606 or, if
previously elected in the Fund's Account Information Form, by telephone at
800-621-2550 (7:00 a.m. to 5:30 p.m. Chicago time). A shareholder should
obtain and read the prospectus relating to any other fund and its shares and
consider its investment objective, policies and applicable fees before making
an exchange. Administration Shares acquired by telephone exchange must be
registered in the same name(s) and have the same address as Administration
Shares of the Fund for which the exchange is being made.
 
  In an effort to prevent unauthorized or fraudulent exchanges by telephone,
Goldman Sachs employs reasonable procedures as set forth under "Redemption of
Administration Shares" to confirm that such instructions are genuine. In times
of drastic economic or market changes, the telephone exchange privilege may be
difficult to implement. For federal income tax purposes, an exchange is
treated as a redemption of the Administration Shares surrendered in the
exchange, on which an investor may be subject to tax, followed by a purchase
of Administration Shares, or the corresponding class of any Goldman Sachs
Money Market Fund received in the exchange. Shareholders should consult their
own tax advisers concerning the tax consequences of
 
                                      38
<PAGE>
 
an exchange. Exchanges are available only in states where exchanges may
legally be made. The exchange privilege may be materially modified or
withdrawn at any time on sixty (60) days' written notice to the recordholders
of Administration Shares and is subject to certain limitations. See "Purchase
of Administration Shares."
 
 
                      REDEMPTION OF ADMINISTRATION SHARES
 
 
  The Funds will redeem their Administration Shares upon request of the
recordholder of such Shares on any Business Day at the net asset value next
determined after receipt of such request in proper form by Goldman Sachs. (See
"Administration Plan" for a description of limited situations where a Service
Organization or other intermediary may be authorized to accept redemptions for
the Funds.) If Administration Shares to be redeemed were recently purchased by
check, a Fund may delay transmittal of redemption proceeds until such time as
it has assured itself that good funds have been collected for the purchase of
such Administration Shares. This may take up to fifteen (15) days. Redemption
requests may be made by a Service Organization by writing to or calling the
Transfer Agent at the address or telephone number set forth on the back cover
page of this Prospectus. A Service Organization may request redemptions by
telephone if the optional telephone redemption privilege is elected on the
Account Information Form. It may be difficult to implement redemptions by
telephone in times of drastic economic or market changes.
 
  In an effort to prevent unauthorized or fraudulent redemption or exchange
requests by telephone, Goldman Sachs employs reasonable procedures specified
by the Trust to confirm that such instructions are genuine. Among other
things, any redemption request that requires money to go to an account or
address other than that designated on the Account Information Form must be in
writing and signed by an authorized person designated on the Account
Information Form. Any such written request is also confirmed by telephone with
both the requesting party and the designated bank account to verify
instructions. (Exchanges among accounts with different names, addresses and
social security or taxpayer identification numbers must be in writing and
signed by an authorized person designated on the Account Information Form.)
Other procedures may be implemented from time to time concerning telephone
redemptions and exchanges. If reasonable procedures are not implemented, the
Trust may be liable for any loss due to unauthorized or fraudulent
transactions. In all other cases, neither the Funds, the Trust nor Goldman
Sachs will be responsible for the authenticity of redemption or exchange
instructions received by telephone. Administration Shares of each Fund earn
dividends declared on the day the shares are redeemed.
 
  The Funds will arrange for the proceeds of redemptions effected by any means
to be wired to the recordholder of Administration Shares or, if the
recordholder elects in writing, by check. Redemption proceeds paid by wire
transfer will normally be wired on the next Business Day in federal funds (for
a total one-day delay), but may be paid up to three (3) days after receipt of
a properly executed redemption request. Wiring of redemption proceeds may be
delayed one additional Business Day if the Federal Reserve Bank is closed on
the day redemption proceeds would ordinarily be wired. Redemption proceeds
paid by check will normally be mailed to the address of record within three
(3) Business Days of receipt of a properly executed redemption request. Once
wire transfer instructions have been given by Goldman Sachs, neither the
Funds, the Trust nor Goldman Sachs assumes any further responsibility for the
performance of intermediaries or the customer's Service Organization in the
transfer process. If a problem with such performance arises, the customer
should deal directly with such intermediaries or Service Organizations.
 
 
                                      39
<PAGE>
 
  Additional documentation regarding a redemption by any means may be required
to effect a redemption when deemed appropriate by the Transfer Agent. The
request for such redemption will not be considered to have been received in
proper form until such additional documentation has been submitted to the
Transfer Agent by the recordholder of Administration Shares.
 
  Service Organizations are responsible for the timely transmittal of
redemption requests by their customers to the Transfer Agent. In order to
facilitate timely transmittal of redemption requests, Service Organizations
have established times by which redemption requests must be received by them.
Additional documentation may be required when deemed appropriate by a Service
Organization.
 
                               ----------------
 
                                      40
<PAGE>
 
 
                                   APPENDIX
 
 
                   GUIDELINES FOR CERTIFICATION OF TAXPAYER
               IDENTIFICATION NUMBER ON ACCOUNT INFORMATION FORM
 
  You are required by law to provide a Fund with your correct Taxpayer
Identification Number (TIN), regardless of whether you file tax returns.
Failure to do so may subject you to penalties. Failure to provide your correct
TIN and to sign your name in the Certification section of the Account
Information Form could result in withholding of 31% by a Fund for the federal
backup withholding tax on distributions, redemptions, exchanges and other
payments relating to your account.
 
  Any tax withheld may be credited against taxes owed on your federal income
tax return.
 
  If you do not have a TIN, you should apply for one immediately by contacting
your local office of the Social Security Administration or the Internal
Revenue Service (IRS). Backup withholding could apply to payments relating to
your account while you are awaiting receipt of a TIN.
 
  Special rules apply for certain entities. For example, for an account
established under a Uniform Gifts or Transfers to Minors Act, the TIN of the
minor should be furnished.
 
  If you have been notified by the IRS that you are subject to backup
withholding because you failed to report your interest and/or dividend income
on your tax return and you have not been notified by the IRS that such
withholding should cease, you must cross out item (2) in the Certification
section of the Account Information Form.
 
  If you are an exempt recipient, you should furnish your TIN and certify your
exemption by signing the Certification section and writing "exempt" after your
signature. Exempt recipients include: corporations, tax-exempt pension plans
and IRAs, governmental agencies, financial institutions, registered securities
and commodities dealers and others.
 
  If you are a nonresident alien or foreign entity, you must provide a
completed Form W-8 to a Fund in order to avoid backup withholding on certain
payments. Other payments to you may be subject to nonresident alien
withholding of up to 30%.
 
  For further information regarding backup and nonresident alien withholding,
see Sections 3406, 1441 and 1442 of the Internal Revenue Code and consult your
tax adviser.
 
                                      A-1
<PAGE>
 
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS ASSET
MANAGEMENT
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN SACHS FUNDS
MANAGEMENT, L.P.
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR
85 BROAD STREET
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
TRANSFER AGENT
4900 SEARS TOWER
CHICAGO, ILLINOIS 60606
 
STATE STREET BANK AND TRUST COMPANY
CUSTODIAN
1776 HERITAGE DRIVE
NORTH QUINCY, MASSACHUSETTS, 02171
 
ARTHUR ANDERSEN LLP
INDEPENDENT PUBLIC ACCOUNTANTS
225 FRANKLIN STREET
BOSTON, MASSACHUSETTS 02110
 
TOLL FREE (IN U.S.) . . . . . . . .  800-621-2550
 
 
FIPROADMIN
501422
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS
FIXED INCOME FUNDS
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
ADMINISTRATION SHARES
 
 
 
LOGO GOLDMAN 
     SACHS
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
- --------------------------------------------------------------------------------
 
PROSPECTUS      GOLDMAN SACHS FIXED INCOME FUNDS SERVICE SHARES
March 1, 1998, as revised
September 1, 1998
 
GOLDMAN SACHS ADJUSTABLE RATE GOVERNMENT FUND
  Seeks a high level of current income, consistent with low volatility of
  principal. The Fund invests primarily in adjustable rate mortgage pass-
  through securities and other mortgage securities with periodic interest rate
  resets, which are issued or guaranteed by the U.S. government, its agencies,
  instrumentalities or sponsored enterprises.
 
GOLDMAN SACHS SHORT DURATION GOVERNMENT FUND
  Seeks a high level of current income and secondarily, in seeking current in-
  come, may also consider the potential for capital appreciation. The Fund in-
  vests primarily in securities issued or guaranteed by the U.S. government,
  its agencies, instrumentalities or sponsored enterprises.
 
GOLDMAN SACHS SHORT DURATION TAX-FREE FUND
  Seeks a high level of current income, consistent with relatively low vola-
  tility of principal, that is exempt from regular federal income tax. The
  Fund invests primarily in municipal securities.
 
GOLDMAN SACHS GOVERNMENT INCOME FUND
  Seeks a high level of current income, consistent with safety of principal.
  The Fund invests primarily in securities, including mortgage-backed
  securities, issued or guaranteed by the U.S. government, its agencies,
  instrumentalities or sponsored enterprises.
 
GOLDMAN SACHS MUNICIPAL INCOME FUND
  Seeks a high level of current income that is exempt from regular federal in-
  come tax, consistent with preservation of capital. The Fund invests primar-
  ily in municipal securities.
 
GOLDMAN SACHS CORE FIXED INCOME FUND
  Seeks a total return consisting of capital appreciation and income that ex-
  ceeds the total return of the Lehman Brothers Aggregate Bond Index. The Fund
  invests primarily in fixed-income securities, including securities issued or
  guaranteed by the U.S. government, its agencies, instrumentalities or spon-
  sored enterprises, corporate securities, mortgage-backed securities and as-
  set-backed securities.
 
GOLDMAN SACHS GLOBAL INCOME FUND
  Seeks a high total return, emphasizing current income and, to a lesser ex-
  tent, providing opportunities for capital appreciation. The Fund invests
  primarily in a portfolio of high quality fixed-income securities of U.S. and
  foreign issuers and foreign currencies.
 
GOLDMAN SACHS HIGH YIELD FUND
  Seeks a high level of current income and, secondarily, may also consider the
  potential for capital appreciation. The Fund invests primarily in fixed-in-
  come securities rated below investment grade.
 
 
 
  This Prospectus provides information about Goldman Sachs Trust (the "Trust")
and the Funds that a prospective investor should understand before investing.
This Prospectus should be retained for future reference. A Statement of
Additional Information (the "Additional Statement"), dated March 1, 1998, as
revised September 1, 1998, containing further information about the Trust and
the Funds which may be of interest to investors, has been filed with the
Securities and Exchange Commission ("SEC"), is incorporated herein by reference
in its entirety, and may be obtained without charge from Service Organizations
(as defined herein) or Goldman Sachs by calling the telephone number, or
writing to one of the addresses, listed on the back cover of this Prospectus.
The SEC maintains a Web site (http://www.sec.gov) that contains the Additional
Statement and other information regarding the Trust.
 
SERVICE SHARES OF THE FUNDS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED
OR ENDORSED BY, ANY BANK OR OTHER INSURED DEPOSITORY INSTITUTION, AND ARE NOT
INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD
OR ANY OTHER GOVERNMENT AGENCY. AN INVESTMENT IN A FUND INVOLVES INVESTMENT
RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
                                                        (continued on next page)
<PAGE>
 
(cover continued)
 
  THE ADJUSTABLE RATE GOVERNMENT, SHORT DURATION GOVERNMENT AND GOVERNMENT
INCOME FUNDS' NET ASSET VALUES AND YIELDS ARE NOT GUARANTEED BY THE U.S.
GOVERNMENT OR BY ITS AGENCIES, INSTRUMENTALITIES OR SPONSORED ENTERPRISES.
 
  THE CORE FIXED INCOME, GLOBAL INCOME AND HIGH YIELD FUNDS MAY INVEST IN
SECURITIES OF FOREIGN ISSUERS AND FOREIGN CURRENCIES THAT ENTAIL CERTAIN RISKS
NOT CUSTOMARILY ASSOCIATED WITH INVESTING IN U.S. DOLLAR-DENOMINATED FIXED-
INCOME SECURITIES. IN PARTICULAR, THE SECURITIES MARKETS OF EMERGING MARKET
COUNTRIES ARE LESS LIQUID, ARE SUBJECT TO GREATER PRICE VOLATILITY, HAVE
SMALLER MARKET CAPITALIZATIONS, HAVE LESS GOVERNMENT REGULATION AND ARE NOT
SUBJECT TO AS EXTENSIVE AND FREQUENT ACCOUNTING, FINANCIAL AND OTHER REPORTING
REQUIREMENTS AS THE SECURITIES MARKETS OF MORE DEVELOPED COUNTRIES.
 
  THE HIGH YIELD FUND INVESTS PRIMARILY IN HIGH YIELD, FIXED-INCOME SECURITIES
RATED BELOW INVESTMENT GRADE THAT ARE CONSIDERED SPECULATIVE AND GENERALLY
INVOLVE GREATER PRICE VOLATILITY AND GREATER RISK OF LOSS OF PRINCIPAL AND
INTEREST THAN INVESTMENTS IN HIGHER RATED FIXED-INCOME SECURITIES.
 
  INVESTORS SHOULD CONSIDER THE RISKS ASSOCIATED WITH INVESTMENT IN A FUND
INVESTING IN FOREIGN AND/OR HIGH YIELD SECURITIES. THE FUNDS MAY NOT BE
SUITABLE FOR ALL INVESTORS. SEE "DESCRIPTION OF SECURITIES" AND "RISK
FACTORS."
 
  Goldman Sachs Funds Management, L.P. ("GSFM"), New York, New York, an
affiliate of Goldman, Sachs & Co. ("Goldman Sachs"), serves as investment
adviser to the Adjustable Rate Government and Short Duration Government Funds.
Goldman Sachs Asset Management ("GSAM"), New York, New York, a separate
operating division of Goldman Sachs, serves as investment adviser to the Short
Duration Tax-Free, Government Income, Municipal Income, Core Fixed Income and
High Yield Funds. Goldman Sachs Asset Management International ("GSAMI"),
London, England, an affiliate of Goldman Sachs, serves as investment adviser
to the Global Income Fund. GSAM, GSFM and GSAMI are each referred to in this
Prospectus as the "Investment Adviser." Goldman Sachs serves as each Fund's
distributor and transfer agent.
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                      PAGE
                                      ----
<S>                                   <C>
Fund Highlights.....................    1
Fees and Expenses...................    7
Financial Highlights................    9
Investment Objectives and Policies..   15
Description of Securities...........   22
Risk Factors........................   31
Investment Techniques...............   34
Investment Restrictions.............   37
Portfolio Turnover..................   38
Management..........................   38
Dividends...........................   42
</TABLE>
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
                          <S>                                               <C>
                          Expenses.........................................  43
                          Net Asset Value..................................  44
                          Performance Information..........................  44
                          Shares of the Trust..............................  45
                          Taxation.........................................  46
                          Additional Information...........................  47
                          Additional Services..............................  48
                          Reports to Shareholders..........................  48
                          Purchase of Service Shares.......................  49
                          Exchange Privilege...............................  51
                          Redemption of Service Shares.....................  51
                          Appendix......................................... A-1
</TABLE>
<PAGE>
 
 
                                FUND HIGHLIGHTS
 
   The following is intended to highlight certain information and is
 qualified in its entirety by the more detailed information contained in this
 Prospectus.
 
 WHAT IS THE GOLDMAN SACHS TRUST?
 
   The Goldman Sachs Trust is an open-end management investment company that
 offers its shares in several investment funds (mutual funds). Each Fund
 pools the monies of investors by selling its shares to the public and
 investing these monies in a portfolio of securities designed to achieve that
 Fund's stated investment objectives.
 
 WHAT ARE THE INVESTMENT OBJECTIVES AND POLICIES OF THE FUNDS?
 
   Each Fund has distinct investment objectives and policies. There can be no
 assurance that a Fund's objectives will be achieved. For a further
 description of each Fund's investment objectives and policies, see
 "Investment Objectives and Policies," "Description of Securities" and
 "Investment Techniques."
 
 WHO MANAGES THE FUNDS?
 
   Goldman Sachs Funds Management, L.P. serves as Investment Adviser to the
 Adjustable Rate Government and Short Duration Government Funds. Goldman
 Sachs Asset Management serves as Investment Adviser to the Short Duration
 Tax-Free, Government Income, Municipal Income, Core Fixed Income and High
 Yield Funds. Goldman Sachs Asset Management International serves as
 Investment Adviser to the Global Income Fund. As of July 24, 1998, the
 Investment Advisers, together with their affiliates, acted as investment
 adviser or distributor for assets in excess of $168 billion.
 
 WHO DISTRIBUTES THE FUNDS' SHARES?
 
   Goldman Sachs acts as distributor of each Fund's shares.
 
                                       1
<PAGE>
 
 
 
<TABLE>
<CAPTION>
                                                         EXPECTED
                                                       APPROXIMATE
                                                         INTEREST
                    INVESTMENT                             RATE
  FUND NAME         OBJECTIVES          DURATION       SENSITIVITY    INVESTMENT SECTOR      CREDIT QUALITY     OTHER INVESTMENTS
- --------------  ------------------ ------------------- ------------ --------------------- -------------------- -------------------
<S>             <C>                <C>                 <C>          <C>                   <C>                  <C>
ADJUSTABLE      A high level of    Target = 6-month    9-month note At least 65% of       U.S. Government      Fixed-rate
RATE            current income,    to 1-year                        total assets in       Securities           mortgage
GOVERNMENT      consistent with    U.S. Treasury                    securities issued or                       pass-through
FUND            low volatility     Security                         guaranteed by the                          securities and
                of principal.      Maximum = 2 years                U.S. government,                           repurchase
                                                                    its agencies,                              agreements
                                                                    instrumentalities                          collateralized by
                                                                    or sponsored                               U.S. Government
                                                                    enterprises                                Securities.
                                                                    ("U.S. Government
                                                                    Securities'')
                                                                    that are adjustable
                                                                    rate mortgage
                                                                    pass-through
                                                                    securities and other
                                                                    mortgage securities
                                                                    with periodic
                                                                    interest rate resets.
 --------------------------------------------------------------------------------------------
SHORT DURATION  A high level of    Target = 2-year     2-year bond  At least 65% of       U.S. Government      Mortgage pass-
GOVERNMENT      current income,    U.S. Treasury                    total assets in       Securities           through
FUND            and secondarily,   Security plus                    U.S. Government                            securities and
                in seeking current or minus .5 years                Securities                                 other securities
                income, may        Maximum = 3 years                and repurchase                             representing an
                also consider                                       agreements                                 interest in or
                the potential                                       collateralized                             collateralized
                for capital                                         by such securities.                        by mortgage loans.
                appreciation.
 --------------------------------------------------------------------------------------------
SHORT DURATION  A high level of    Target = Lehman     3-year bond  At least 80% of       Minimum = BBB/Baa    U.S. Government
TAX-FREE        current income,    Brothers                         net assets in                              Securities
FUND            consistent with    3-year Municipal                 municipal securities.                      and repurchase
                low volatility     Bond Index                                                                  agreements
                of principal,      plus or minus                                                               collateralized
                that is exempt     .5 years                                                                    by such securities.
                from regular       Maximum = 4 years
                federal
                income tax.
 --------------------------------------------------------------------------------------------
GOVERNMENT      A high level of    Target = Lehman     5-year bond  At least 65% of total U.S. Government      Non-government
INCOME          current income,    Brothers Mutual                  assets in U.S.        Securities; non-U.S. mortgage pass-
FUND            consistent with    Fund Government/                 Government            Government           through securities,
                safety of          Mortgage Index                   Securities, including Securities =         asset-backed
                principal.         plus or minus                    mortgage-backed       AAA/Aaa              securities and
                                   1 year                           U.S. Government                            corporate
                                   Maximum = 6 years                Securities and                             fixed-income
                                                                    repurchase                                 securities.
                                                                    agreements
                                                                    collateralized by
                                                                    U.S. Government
                                                                    Securities.
<CAPTION>
  FUND NAME         BENCHMARK
- --------------- -----------------
<S>             <C>
ADJUSTABLE      6-month and
RATE            1-year U.S.
GOVERNMENT      Treasury Security
FUND
 --------------------------------------------------------------------------------------------
SHORT DURATION  2-year U.S.
GOVERNMENT      Treasury Security
FUND
 --------------------------------------------------------------------------------------------
SHORT DURATION  Lehman Brothers
TAX-FREE        3-Year Municipal
FUND            Bond Index
 --------------------------------------------------------------------------------------------
GOVERNMENT      Lehman Brothers
INCOME          Mutual Fund
FUND            Government/
                Mortgage Index
</TABLE>
 
 
                                       2
<PAGE>
 
 
 
<TABLE>
<CAPTION>
                                                         EXPECTED
                                                       APPROXIMATE
                                                         INTEREST
                  INVESTMENT                               RATE
 FUND NAME        OBJECTIVES            DURATION       SENSITIVITY    INVESTMENT SECTOR       CREDIT QUALITY
 --------------------------------------------------------------------------------------------
<S>          <C>                  <C>                  <C>          <C>                    <C>
MUNICIPAL    A high level of      Target = Lehman      15-year bond At least 80% of        Minimum = BBB/Baa
INCOME       current income       Brothers 15-year                  net assets in          Average = AA/Aa
FUND         that is exempt       Municipal Bond                    municipal securities.
             from regular         Index plus
             federal income       or minus 1 year
             tax, consistent      Maximum = 12 years
             with preservation
             of capital.
 --------------------------------------------------------------------------------------------
CORE FIXED   Total return         Target = Lehman      5-year bond  At least 65% of        Minimum = BBB/Baa
INCOME FUND  consisting           Brothers                          assets in fixed-income Minimum for
             of capital           Aggregate Bond                    securities, including  non-dollar securities
             appreciation         Index plus or                     U.S. Government        = AA/Aa
             and income that      minus 1 year                      Securities, corporate,
             exceeds the total    Maximum = 6 years                 mortgage-backed
             return of the                                          and asset-backed
             Lehman Brothers                                        securities.
             Aggregate Bond
             Index.
 --------------------------------------------------------------------------------------------
GLOBAL       A high total return, Target = J.P. Morgan 6-year bond  Securities of          Minimum = BBB/Baa
INCOME       emphasizing current  Global Government                 U.S. and foreign       At least 50% =
FUND         income, and, to      Bond Index                        governments and        AAA/Aaa
             a lesser extent,     (hedged) plus or                  corporations.
             providing            minus 2.5 years
             opportunities        Maximum = 7.5 years
             for capital
             appreciation.
 --------------------------------------------------------------------------------------------
HIGH YIELD   A high level of      Target = Lehman      6-year bond  At least 65% of        At least 65% =
FUND         current income       Brothers High                     assets in fixed-       BB/Ba or below
             and capital          Yield Bond Index                  income securities
             appreciation.        plus or minus                     rated below
                                  2.5 years                         investment grade,
                                  Maximum =7.5 years                including U.S. and
                                                                    non-U.S. dollar
                                                                    corporate debt,
                                                                    foreign
                                                                    government
                                                                    securities,
                                                                    convertible
                                                                    securities
                                                                    and preferred stock.
<CAPTION>
 FUND NAME     OTHER INVESTMENTS       BENCHMARK
 --------------------------------------------------------------------------------------------
<S>          <C>                    <C>
MUNICIPAL    U.S. Government        Lehman Brothers
INCOME       Securities and         15-Year
FUND         repurchase             Municipal
             agreements             Bond Index
             collateralized by
             such securities.
 --------------------------------------------------------------------------------------------
CORE FIXED   Foreign fixed-         Lehman Brothers
INCOME FUND  income,                Aggregate Bond
             municipal and          Index
             convertible
             securities,
             foreign currencies
             and repurchase
             agreements
             collateralized
             by U.S.
             Government
             Securities.
 --------------------------------------------------------------------------------------------
GLOBAL       Mortgage and           J.P. Morgan
INCOME       asset-backed           Global
FUND         securities, foreign    Government
             currencies and         Bond Index
             repurchase             (hedged)
             agreements
             collateralized by
             U.S. Government
             Securities or
             certain foreign
             government securities.
 --------------------------------------------------------------------------------------------
HIGH YIELD   Mortgage-backed        Lehman Brothers
FUND         and asset-backed       High Yield
             securities, U.S.       Bond Index
             Government
             Securities,
             investment grade
             corporate fixed-
             income securities,
             structured
             securities,
             foreign currencies
             and repurchase
             agreements
             collateralized by
             U.S. Government
             Securities.
</TABLE>
 
 
                                       3
<PAGE>
 
 
 WHAT ARE THE RISK FACTORS AND SPECIAL CHARACTERISTICS THAT I SHOULD CONSIDER
 BEFORE INVESTING?
 
   Each Fund's share price will fluctuate with market, economic and, with
 respect to the Core Fixed Income, Global Income and High Yield Funds,
 foreign exchange conditions, so that an investment in any of the Funds may
 be worth more or less when redeemed than when purchased. None of the Funds
 should be relied upon as a complete investment program. There can be no
 assurance that a Fund's investment objectives will be achieved. See "Risk
 Factors."
 
   Interest Rate Risk. When interest rates decline, the market value of
 fixed-income securities tends to increase. Conversely, when interest rates
 increase, the market value of fixed-income securities tends to decline.
 Volatility of a security's market value will differ depending upon the
 security's duration, the issuer and the type of instrument.
 
   Default Risk/Credit Risk. Investments in fixed-income securities are
 subject to the risk that the issuer could default on its obligations, and a
 Fund could sustain losses on such investments. A default could impact both
 interest and principal payments.
 
   Call Risk and Extension Risk. Fixed-income securities may be subject to
 both call risk and extension risk. Call risk (i.e., where the issuer
 exercises its right to pay principal on an obligation earlier than
 scheduled) causes cash flow to be returned earlier than expected. Call risk
 typically results when interest rates have declined. Under such
 circumstances, a Fund may be unable to recoup all of its initial investment
 and will also suffer from having to reinvest in lower yielding securities.
 Extension risk (i.e., where the issuer exercises its right to pay principal
 on an obligation later than scheduled) causes cash flows to be returned
 later than expected. Extension risk typically results when interest rates
 have increased. Under such circumstances, a Fund will suffer from the
 inability to invest in higher yielding securities. The investment
 characteristics of Mortgage-Backed Securities (including adjustable rate
 mortgage securities) and Asset-Backed Securities differ from those of
 traditional fixed-income securities because they generally have both call
 risk (also known as prepayment risk) and extension risk.
 
   Tax Risk of Municipal Securities. Because of their tax-exempt status, the
 yields and market values of municipal securities may be more adversely
 impacted by changes in tax rates and policies than taxable fixed-income
 securities.
 
   Risks of investing in non-investment grade fixed-income securities. Non-
 investment grade fixed-income securities (commonly referred to as "junk
 bonds") are subject to greater volatility and risk of loss and are less
 liquid than securities which are perceived to be of higher credit quality.
 Such securities, also referred to as high yield securities, are considered
 to be speculative by traditional investment standards. High yield securities
 are subject to increased risk of an issuer's inability to meet principal and
 interest payments. The High Yield Fund may invest in securities which are in
 default at the time of investment. The market for non-investment grade
 securities tends to be concentrated in a limited number of market makers,
 which may affect liquidity. In addition, the market price of such securities
 tends to reflect individual corporate developments to a greater extent than
 that of higher rated securities which react primarily to the general level
 of interest rates.
 
   Foreign Risks. Investments in securities of foreign issuers and currencies
 involve risks that are different from those associated with investments in
 domestic securities. The risks associated with foreign investments and
 currencies include changes in relative currency exchange rates, political
 and economic developments, the imposition of exchange controls, confiscation
 and other governmental restrictions. In addition, the securities
 
                                       4
<PAGE>
 
 markets of foreign countries are generally less liquid and subject to
 greater price volatility. To the extent that the Core Fixed Income, Global
 Income and High Yield Funds invest in emerging markets and countries, these
 risks may be heightened.
 
   Other. A Fund's use of certain investment techniques, including
 derivatives, forward contracts, options, futures and swap transactions, will
 subject the Fund to greater risk than funds that do not employ such
 techniques.
 
   Diversified and Non-Diversified Funds. Each Fund, other than the Global
 Income Fund, is a "diversified open-end management company" as defined under
 the Investment Company Act of 1940, as amended (the "Act"). The Global
 Income Fund is a "non-diversified" open-end management company as defined
 under the Act and is, therefore, subject only to certain federal tax
 diversification requirements (to which the other Funds are also subject), in
 addition to the policies adopted by the Investment Adviser. To the extent
 that the Fund is not diversified under the Act, it will be more susceptible
 to adverse developments affecting any single issuer of portfolio securities.
 See "Investment Restrictions."
 
 WHAT IS THE MINIMUM INVESTMENT?
 
   The Funds do not have any minimum purchase or account requirements with
 respect to Service Shares. A Service Organization may, however, impose a
 minimum amount for initial and subsequent investments in Service Shares, and
 may establish other requirements such as a minimum account balance.
 
 HOW DO I PURCHASE SERVICE SHARES?
 
   Customers of Service Organizations may invest in Service Shares only
 through their Service Organizations. Service Shares of a Fund are purchased
 at the current net asset value without any sales load. See "Purchase of
 Service Shares."
 
   ADDITIONAL SERVICES. The Trust, on behalf of the Funds, has adopted a
 Service Plan with respect to the Service Shares which authorizes a Fund to
 compensate Service Organizations for providing account administration and
 shareholder liaison services to their customers who are the beneficial
 owners of such Shares. The Trust, on behalf of the Funds, will enter into
 agreements with each Service Organization which will provide for
 compensation to the Service Organization in an amount up to 0.50% (on an
 annualized basis) of the average daily net assets of the Services Shares of
 the Funds attributable to or held in the name of the Service Organization
 for its customers. See "Additional Services."
 
 HOW DO I SELL MY SERVICE SHARES?
 
   You may redeem Service Shares upon request on any Business Day, as defined
 under "Additional Information," at the net asset value next determined after
 receipt of such request in proper form. See "Redemption of Service Shares."
 
                                       5
<PAGE>
 
 
 HOW DO I RECEIVE DIVIDENDS AND DISTRIBUTIONS?
 
<TABLE>
<CAPTION>
                                               INVESTMENT INCOME
                                                   DIVIDENDS
                                               ------------------ CAPITAL GAINS
       FUND                                    DECLARED    PAID   DISTRIBUTION
       ----                                    ------------------ -------------
  <S>                                          <C>       <C>      <C>
  Adjustable Rate Government.................. Daily      Monthly   Annually
  Short Duration Government .................. Daily      Monthly   Annually
  Short Duration Tax-Free..................... Daily      Monthly   Annually
  Government Income........................... Daily      Monthly   Annually
  Municipal Income............................ Daily      Monthly   Annually
  Core Fixed Income........................... Daily      Monthly   Annually
  Global Income .............................. Monthly    Monthly   Annually
  High Yield.................................. Daily      Monthly   Annually
</TABLE>
 
   Recordholders of Service Shares may receive dividends in additional
 Service Shares of the Fund in which they have invested or may elect to
 receive cash. For further information concerning dividends, see "Dividends."
 
                                       6
<PAGE>
 
 
                               FEES AND EXPENSES
                               (SERVICE SHARES)
 
 
<TABLE>
<CAPTION>
                                 ADJUSTABLE   SHORT     SHORT                         CORE
                                    RATE     DURATION  DURATION GOVERNMENT MUNICIPAL FIXED  GLOBAL HIGH
                                 GOVERNMENT GOVERNMENT TAX-FREE   INCOME    INCOME   INCOME INCOME YIELD
                                    FUND       FUND      FUND      FUND      FUND     FUND   FUND  FUND
                                 ---------- ---------- -------- ---------- --------- ------ ------ -----
<S>                              <C>        <C>        <C>      <C>        <C>       <C>    <C>    <C>
SHAREHOLDER TRANSACTION
 EXPENSES:
 Maximum Sales Charge Imposed
  on Purchases.................     none       none      none      none      none     none   none  none
 Maximum Sales Charge Imposed
  on Reinvested Dividends......     none       none      none      none      none     none   none  none
 Redemption Fees...............     none       none      none      none      none     none   none  none
 Exchange Fees.................     none       none      none      none      none     none   none  none
ANNUAL FUND OPERATING EXPENSES:
 (as a percentage of average
 daily net assets)/1/
 Management Fees (after
  applicable limitations)/2/...     0.40%      0.50%     0.35%     0.54%     0.50%    0.40%  0.65% 0.70%
 Service Fees/3/...............     0.50%      0.50%     0.50%     0.50%     0.50%    0.50%  0.50% 0.50%
 Other Expenses (after
  applicable limitations)/4/...     0.09%      0.04%     0.04%     0.04%     0.04%    0.14%  0.04% 0.06%
                                    ----       ----      ----      ----      ----     ----   ----  ----
TOTAL FUND OPERATING EXPENSES
 (after fee and expense
 limitations)/5/...............     0.99%      1.04%     0.89%     1.08%     1.04%    1.04%  1.19% 1.26%
                                    ====       ====      ====      ====      ====     ====   ====  ====
</TABLE>
 
EXAMPLE
 
  You would pay the following expenses on a hypothetical $1,000 investment
assuming (i) a 5% annual return and (ii) redemption at the end of each time
period.
 
<TABLE>
<CAPTION>
   FUND                                          1 YEAR 3 YEARS 5 YEARS 10 YEARS
   ----                                          ------ ------- ------- --------
<S>                                              <C>    <C>     <C>     <C>
Adjustable Rate Government......................  $10     $32     $55     $121
Short Duration Government.......................  $11     $33     $57     $127
Short Duration Tax-Free.........................  $ 9     $28     $49     $110
Government Income...............................  $11     $34     $60     $132
Municipal Income................................  $11     $33     $57     $127
Core Fixed Income...............................  $11     $33     $57     $127
Global Income...................................  $12     $38     $65     $144
High Yield......................................  $13     $40     $69     $152
</TABLE>
- --------
/1/The Funds' annual operating expenses have been restated to reflect fees and
  expenses in effect as of September 1, 1998.
/2/The Investment Adviser has voluntarily agreed that a portion of the
  management fee would not be imposed on the Short Duration Tax-Free,
  Government Income, Municipal Income and Global Income Funds equal to 0.05%,
  0.11%, 0.05% and 0.25%, respectively. Without such limitations, management
  fees would be 0.40%, 0.65%, 0.55% and 0.90% of each Fund's average daily net
  assets, respectively.
/3/Service Organizations may charge other fees to their customers who are
  beneficial owners of Service Shares in connection with their customer
  accounts.
 
                                       7
<PAGE>
 
/4./ The Investment Adviser has voluntarily agreed to reduce or limit certain
     other expenses (excluding management fees, transfer agency fees (equal to
     0.04% of the average daily net assets of each Fund's Service Shares),
     service fees, taxes, interest and brokerage fees and litigation,
     indemnification and other extraordinary expenses) to the extent such
     expenses exceed 0.05%, 0.00%, 0.00%, 0.00%, 0.00%, 0.10%, 0.00% and 0.02%
     of the average daily net assets of the Adjustable Rate Government, Short
     Duration Government, Short Duration Tax-Free, Government Income,
     Municipal Income, Core Fixed Income, Global Income and High Yield Funds,
     respectively.
 
/5./ Without the limitations described above, "Other Expenses" and "Total
     Operating Expenses" of the Service Shares of the Funds would be as set
     forth below:
 
<TABLE>
<CAPTION>
                                                         OTHER   TOTAL OPERATING
                                                        EXPENSES    EXPENSES
                                                        -------- ---------------
   <S>                                                  <C>      <C>
   Adjustable Rate Government..........................  0.12%        1.02%
   Short Duration Government...........................  0.26%        1.26%
   Short Duration Tax-Free.............................  0.63%        1.53%
   Government Income...................................  0.41%        1.56%
   Municipal Income....................................  0.35%        1.40%
   Core Fixed Income...................................  0.34%        1.24%
   Global Income.......................................  0.18%        1.58%
   High Yield..........................................  0.37%        1.57%
</TABLE>
 
  The Investment Adviser and Goldman Sachs may modify or discontinue any of
the limitations set forth above in the future at their discretion. The
information set forth in the foregoing table and hypothetical example relates
only to Service Shares of the Funds. Each Fund also offers Institutional and
Class A Shares and, with the exception of the Adjustable Rate Government Fund,
Class B and Class C Shares. The Adjustable Rate Government, Short Duration
Government, Short Duration Tax-Free and Core Fixed Income Funds also offer
Administration Shares. The other classes of the Funds are subject to different
fees and expenses (which affect performance), have different minimum
investment requirements and are entitled to different services. Information
regarding any other class of the Funds may be obtained from your sales
representative or from Goldman Sachs by calling the number on the back cover
page of this Prospectus.
 
  In addition to the compensation itemized above, certain Service
Organizations may receive other compensation in connection with the sale and
distribution of Service Shares or for service to their customers' accounts
and/or the Funds. For additional information regarding such compensation, see
"Purchase of Service Shares" in this Prospectus and the Additional Statement.
 
  The purpose of the foregoing table is to assist investors in understanding
the various fees and expenses of a Fund that an investor will bear directly or
indirectly. The information on the fees and expenses included in the table and
the hypothetical example above are based on each Fund's fees and expenses
(actual or estimated) and should not be considered as representative of past
or future expenses. Actual fees and expenses may be greater or less than those
indicated. Moreover, while the example assumes a 5% annual return, a Fund's
actual performance will vary and may result in an actual return greater or
less than 5%. See "Management--Investment Advisers" and "Additional Services."
 
                                       8
<PAGE>
 
                             FINANCIAL HIGHLIGHTS
 
         SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD
 
  The following data has been audited by Arthur Andersen LLP, independent
public accountants, as indicated in their report incorporated by reference
into the Additional Statement from the Annual Report to shareholders of the
Funds for the year ended October 31, 1997 (the "Annual Report"). This
information should be read in conjunction with the financial statements and
related notes incorporated by reference and attached to the Additional
Statement. The Annual Report also contains performance information and is
available upon request and without charge by calling the telephone number or
writing to one of the addresses on the back cover of this Prospectus.
<TABLE>
<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                           ---------------------------------------------------
                                        NET REALIZED       NET
                                            AND          REALIZED
                                         UNREALIZED        AND
                                        GAIN (LOSS)     UNREALIZED    TOTAL
                                             ON        GAIN (LOSS)    INCOME
                 NET ASSET              INVESTMENT,     ON FOREIGN    (LOSS)
                 VALUE AT     NET        OPTION AND      CURRENCY      FROM    
                 BEGINNING INVESTMENT     FUTURES        RELATED    INVESTMENT 
                 OF PERIOD   INCOME     TRANSACTIONS   TRANSACTIONS OPERATIONS 
                 --------- ----------   ------------   ------------ ---------- 
                                 ADJUSTABLE RATE GOVERNMENT FUND                      
- -----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>          <C>            <C>          <C>        
FOR THE YEARS ENDED OCTOBER 31,
- -------------
1997-
Institutional
Shares..........  $ 9.83    $0.5914(a)    $ 0.0494 (a)     --        $0.6408               
1997-                                                                                      
Administration                                                                             
Shares..........    9.83     0.5665(a)      0.0497 (a)     --         0.6162               
1997-Service                                                                               
Shares(m).......    9.84     0.3298(a)      0.0400 (a)     --         0.3698               
1997-Class A                                                                               
Shares..........    9.83     0.5662(a)      0.0500 (a)     --         0.6162               
1996-                                                                                      
Institutional                                                                              
Shares..........    9.77     0.5759(a)      0.0772 (a)     --         0.6531               
1996-                                                                                      
Administration                                                                             
Shares..........    9.77     0.5489(a)      0.0797 (a)     --         0.6286               
1996-Class A                                                                               
Shares..........    9.77     0.5481(a)      0.0806 (a)     --         0.6287               
1995-                                                                                      
Institutional                                                                              
Shares..........    9.74     0.5630(a)      0.0717 (a)     --         0.6347               
1995-                                                                                      
Administration                                                                             
Shares..........    9.74     0.5366(a)      0.0737 (a)     --         0.6103               
1995-Class A                                                                               
Shares(c).......    9.79     0.2721(a)     (0.0090)(a)     --         0.2631               
1994-                                                                                      
Institutional                                                                              
Shares..........   10.00     0.4341(a)     (0.2455)(a)     --         0.1886               
1994-                                                                                      
Administration                                                                             
Shares..........   10.00     0.4211(a)     (0.2572)(a)     --         0.1639               
1993-                                                                                      
Institutional                                                                              
Shares..........   10.04     0.4397(a)     (0.0376)(a)     --         0.4021               
1993-                                                                                      
Administration                                                                             
Shares(e).......   10.02     0.2146(a)     (0.0173)(a)     --         0.1973               
1992-                                                                                      
Institutional                                                                              
Shares..........   10.03     0.5599(a)     (0.0029)(a)     --         0.5570               
FOR THE PERIOD JULY 17, 1991(G) THROUGH OCTOBER 31,
- -------------------
1991-
Institutional
Shares..........   10.00     0.1531(a)      0.0322(a)      --         0.1853              
- -----------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                                      
                                         DISTRIBUTIONS TO SHAREHOLDERS                                
                 -------------------------------------------------------------------------            
                                                         IN EXCESS                                    
                                  FROM NET                 OF NET                                     
                                  REALIZED                REALIZED                            NET     
                                  GAIN ON                 GAIN ON                           INCREASE  
                                INVESTMENT,  IN EXCESS  INVESTMENT,   FROM       TOTAL     (DECREASE) 
                  FROM NET       OPTION AND    OF NET    OPTION AND   PAID   DISTRIBUTIONS   IN NET   
                 INVESTMENT       FUTURES    INVESTMENT   FUTURES      IN         TO         ASSET    
                   INCOME       TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL SHAREHOLDERS    VALUE    
                 ----------     ------------ ---------- ------------ ------- ------------- ----------  
                                 ADJUSTABLE RATE GOVERNMENT FUND                      
- ------------------------------------------------------------------------------------------------------------------------------------
<S>              <C>            <C>          <C>        <C>          <C>     <C>            <C> 
FOR THE YEARS ENDED OCTOBER 31,                                                       
- -------------                                                                         
1997-                                                                                 
Institutional                                                                         
Shares..........   $(0.5908)       --            --        --         --      $(0.5908)    $ 0.0500   
1997-                                                                                                 
Administration                                                                                        
Shares..........    (0.5662)       --            --        --         --       (0.5662)      0.0500   
1997-Service                                                                                          
Shares(m).......    (0.3298)       --            --        --         --       (0.3298)      0.0400   
1997-Class A                                                                                          
Shares..........    (0.5662)       --            --        --         --       (0.5662)      0.0500   
1996-                                                                                                 
Institutional                                                                                         
Shares..........    (0.5725)       --        (0.0206)      --         --       (0.5931)      0.0600   
1996-                                                                                                 
Administration                                                                                        
Shares..........    (0.5489)       --        (0.0198)      --         --       (0.5687)      0.0600   
1996-Class A                                                                                          
Shares..........    (0.5489)       --        (0.0198)      --         --       (0.5687)      0.0600   
1995-                                                                                                 
Institutional                                                                                         
Shares..........    (0.5759)       --        (0.0287)      --         --       (0.6046)      0.0301   
1995-                                                                                                 
Administration                                                                                        
Shares..........    (0.5528)       --        (0.0275)      --         --       (0.5803)      0.0300   
1995-Class A                                                                                          
Shares(c).......    (0.2697)       --        (0.0134)      --         --       (0.2831)     (0.0200)  
1994-                                                                                                 
Institutional                                                                                         
Shares..........    (0.4486)       --            --        --         --       (0.4486)     (0.2600)  
1994-                                                                                                 
Administration                                                                                        
Shares..........    (0.4239)       --            --        --         --       (0.4239)     (0.2600)  
1993-                                                                                                 
Institutional                                                                                         
Shares..........    (0.4397)       --        (0.0024)      --         --       (0.4421)     (0.0400)  
1993-                                                                                                 
Administration                                                                                        
Shares(e).......    (0.2146)       --        (0.0027)      --         --       (0.2173)     (0.0200)  
1992-                                                                                                 
Institutional                                                                                         
Shares..........    (0.5470)       --            --        --         --       (0.5470)      0.0100    
FOR THE PERIOD JULY 17, 1991(G) THROUGH OCTOBER 31,                                   
- -------------------                                                                   
1991-                                                                                 
Institutional                                                                         
Shares..........    (0.1553)       --            --        --         --       (0.1553)      0.0300 
- ------------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                              RATIOS ASSUMING NO
                                                                              VOLUNTARY WAIVER OF
                                                                                FEES OR EXPENSE
                                                                                  LIMITATIONS
                                                                              --------------------
                 
                                   RATIO OF
                  NET                NET      RATIO OF                        RATIO OF   RATIO OF
                 ASSET             EXPENSES     NET                    NET    EXPENSES     NET
                 VALUE                TO     INVESTMENT             ASSETS AT    TO     INVESTMENT
                 AT END            AVERAGE   INCOME TO  PORTFOLIO    END OF   AVERAGE   INCOME TO
                   OF     TOTAL      NET      AVERAGE   TURNOVER     PERIOD     NET      AVERAGE
                 PERIOD RETURN(K)   ASSETS   NET ASSETS  RATE(D)    (IN 000S)  ASSETS   NET ASSETS
                 ------ ---------- --------- ---------- ----------- --------- --------- ----------
                                 ADJUSTABLE RATE GOVERNMENT FUND
- -----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>     <C>        <C>      <C>         <C>        <C>        <C>      <C>        
FOR THE YEARS ENDED OCTOBER 31,
- -------------
1997-
Institutional
Shares..........  $ 9.88   6.70%      0.49%      5.99%     46.58%    $ 463,511   0.52%      5.96%
1997-            
Administration   
Shares..........    9.88   6.43       0.74       5.73      46.58         2,793   0.77       5.70
1997-Service     
Shares(m).......    9.88   3.81(f)    1.05(b)    5.64(b)   46.58(f)        346   1.08(b)    5.61(b)
1997-Class A     
Shares..........    9.88   6.43       0.74       5.60      46.58        43,393   1.02       5.32
1996-            
Institutional    
Shares..........    9.83   6.86       0.45       5.85      52.36       613,149   0.51       5.79
1996-            
Administration   
Shares..........    9.83   6.60       0.70       5.59      52.36         3,792   0.76       5.53
1996-Class A     
Shares..........    9.83   6.60       0.70       5.59      52.36        10,728   1.01       5.28
1995-            
Institutional    
Shares..........    9.77   6.75       0.46       5.77      24.12       657,358   0.53       5.70
1995-            
Administration   
Shares..........    9.77   6.48       0.71       5.50      24.12         3,572   0.78       5.43
1995-Class A     
Shares(c).......    9.77   2.74(f)    0.69(b)    5.87(b)   24.12(f)     15,203   1.01(b)    5.55(b)
1994-            
Institutional    
Shares..........    9.74   1.88       0.46       4.38      37.81       942,523   0.49       4.35
1994-            
Administration   
Shares..........    9.74   1.63       0.71       4.27      37.81         6,960   0.74       4.24
1993-            
Institutional    
Shares..........   10.00   4.13       0.45       4.36     103.74     2,760,871   0.48       4.33
1993-            
Administration   
Shares(e).......   10.00   2.01(f)    0.70(b)    3.81(b)  103.74(f)      5,326   0.73(b)    3.78(b)
1992-            
Institutional    
Shares..........   10.04   6.12       0.42       5.61     286.40     2,145,064   0.55       5.48
FOR THE PERIOD JULY 17, 1991(G) THROUGH OCTOBER 31,
- -------------------
1991-
Institutional
Shares..........   10.03   2.14(f)    0.20(b)    7.31(b)  145.67(f)    239,642   1.02(b)    6.49(b)
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>
 
                                       9
<PAGE>
 
<TABLE>
<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                           ---------------------------------------------------
                                        NET REALIZED       NET
                                            AND          REALIZED
                                         UNREALIZED        AND
                                        GAIN (LOSS)     UNREALIZED    TOTAL
                                             ON        GAIN (LOSS)    INCOME
                 NET ASSET              INVESTMENT,     ON FOREIGN    (LOSS)
                 VALUE AT     NET        OPTION AND      CURRENCY      FROM     FROM NET
                 BEGINNING INVESTMENT     FUTURES        RELATED    INVESTMENT INVESTMENT
                 OF PERIOD   INCOME     TRANSACTIONS   TRANSACTIONS OPERATIONS   INCOME
                 --------- ----------   ------------   ------------ ---------- ----------
                                  SHORT DURATION GOVERNMENT FUND
- -----------------------------------------------------------------------------------------
<S>              <C>       <C>          <C>            <C>          <C>        <C>
FOR THE YEARS ENDED OCTOBER 31,
- -----------------
1997-
Institutional
Shares..........  $ 9.83    $0.6412(a)    $ 0.0300(a)      --        $ 0.6712   $(0.6412)
1997-
Administration
Shares..........    9.85     0.6183(a)      0.0400(a)      --          0.6583    (0.6183)
1997-Service
Shares..........    9.82     0.5904(a)      0.0401(a)      --          0.6305    (0.5904)
1997-Class A
Shares(o).......    9.78     0.3121(a)      0.0883(a)      --          0.4004    (0.3004)
1997-Class B
Shares(o).......    9.75     0.2787(a)      0.1011(a)      --          0.3798    (0.2698)
1997-Class C
Shares(p).......    9.83     0.1185(a)      0.0225(a)      --          0.1410    (0.1110)
1996-
Institutional
Shares..........    9.82     0.6290(a)      0.0136(a)      --          0.6426    (0.6326)
1996-
Administration
Shares(h).......    9.86     0.3837(a)      0.0003(a)      --          0.3840    (0.3940)
1996-Service
Shares(i).......    9.72     0.3134(a)      0.1018(a)      --          0.4152    (0.3152)
1995-
Institutional
Shares..........    9.64     0.6652(a)      0.1666(a)      --          0.8318    (0.6518)
1995-
Administration
Shares..........    9.64     0.2384(a)     (0.0433)(a)     --          0.1951    (0.2051)
1994-
Institutional
Shares..........   10.14     0.5628(a)     (0.4592)(a)     --          0.1036    (0.5598)
1994-
Administration
Shares..........   10.14     0.5329(a)     (0.4539)(a)     --          0.0790    (0.5352)
1993-
Institutional
Shares..........   10.16     0.5627(a)     (0.0135)(a)     --          0.5492    (0.5627)
1993-
Administration
Shares(e).......   10.23     0.2725(a)     (0.0900)(a)     --          0.1825    (0.2725)
1992-
Institutional
Shares..........   10.22     0.6703(a)     (0.0600)(a)     --          0.6103    (0.6703)
1991-
Institutional
Shares..........   10.00     0.8020(a)      0.2200(a)      --          1.0220    (0.8020)
1990-
Institutional
Shares..........   10.07     0.8300(a)     (0.0700)(a)     --          0.7600    (0.8300)
1989-
Institutional
Shares..........   10.10     0.8800(a)         --          --          0.8800    (0.8800)
FOR THE PERIOD AUGUST 15, 1988(G) THROUGH OCTOBER 31,
- -----------------------------
1988-
Institutional
Shares..........   10.00     0.1800(a)      0.1000(a)      --          0.2800    (0.1800)
- ------------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                                                                                 
                                                                                                                                 
                                                                                                                                 
                          DISTRIBUTIONS TO SHAREHOLDERS                                                                          
                 -----------------------------------------------------------                                                     
                                          IN EXCESS                                                                              
                   FROM NET                 OF NET                                                           RATIO OF            
                   REALIZED                REALIZED                             NET      NET                   NET      RATIO OF 
                   GAIN ON                 GAIN ON                            INCREASE  ASSET                EXPENSES     NET    
                 INVESTMENT,  IN EXCESS  INVESTMENT,   FROM        TOTAL     (DECREASE) VALUE                   TO     INVESTMENT
                  OPTION AND    OF NET    OPTION AND   PAID    DISTRIBUTIONS   IN NET   AT END               AVERAGE   INCOME TO 
                   FUTURES    INVESTMENT   FUTURES      IN          TO         ASSET      OF        TOTAL      NET      AVERAGE  
                 TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL  SHAREHOLDERS    VALUE    PERIOD    RETURN(K)   ASSETS   NET ASSETS
                 ------------ ---------- ------------ -------- ------------- ---------- --------- ---------- --------- ----------
                                                  SHORT DURATION GOVERNMENT FUND  
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>          <C>        <C>          <C>      <C>           <C>        <C>       <C>        <C>       <C>       
FOR THE YEARS ENDED OCTOBER 31,                                                                                                  
- -----------------                                                                                                                
1997-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --     $(0.6412)    $ 0.0300  $ 9.86       7.07%     0.45%      6.43%  
1997-                                                                                                                            
Administration                                                                                                                   
Shares..........       --          --        --           --      (0.6183)      0.0400    9.89       6.91      0.70       6.19   
1997-Service                                                                                                                     
Shares..........       --          --        --           --      (0.5904)      0.0401    9.86       6.63      0.95       5.92   
1997-Class A                                                                                                                     
Shares(o).......       --          --        --           --      (0.3004)      0.1000    9.88       4.14(f)   0.70(b)    6.05(b)
1997-Class B                                                                                                                     
Shares(o).......       --          --        --           --      (0.2698)      0.1100    9.86       3.94(f)   1.30(b)    5.52(b)
1997-Class C                                                                                                                     
Shares(p).......       --          --        --           --      (0.1110)      0.0300    9.86       1.44(f)   1.45(b)    5.52(b)
1996-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --      (0.6326)      0.0100    9.83       6.75      0.45       6.44   
1996-                                                                                                                            
Administration                                                                                                                   
Shares(h).......       --          --        --           --      (0.3940)     (0.0100)   9.85       4.00(f)   0.70(b)    5.97(b)
1996-Service                                                                                                                     
Shares(i).......       --          --        --           --      (0.3152)      0.1000    9.82       4.35(f)   0.95(b)    6.05(b)
1995-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --      (0.6518)      0.1800    9.82       8.97      0.45       6.87   
1995-                                                                                                                            
Administration                                                                                                                   
Shares..........       --          --        --           --      (0.2051)     (0.0100)   9.63(h)    2.10      0.70(b)    7.91(b)
1994-                                                                                                                            
Institutional                                                                                                                    
Shares..........   (0.0438)        --        --           --      (0.6036)     (0.5000)   9.64       0.99      0.45       5.69   
1994-                                                                                                                            
Administration                                                                                                                   
Shares..........   (0.0438)        --        --           --      (0.5790)     (0.5000)   9.64       0.73      0.70       5.38   
1993-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --      (0.0065)      --           --      (0.5692)     (0.0200)  10.14       5.55      0.45       5.46   
1993-                                                                                                                            
Administration                                                                                                                   
Shares(e).......       --          --        --           --      (0.2725)     (0.0900)  10.14       1.74(f)   0.70(b)    4.84(b)
1992-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --      (0.6703)     (0.0600)  10.16       6.24      0.45       6.60   
1991-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --      (0.8020)      0.2200   10.22      10.93      0.45       8.25   
1990-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --      (0.8300)     (0.0700)  10.00       8.23      0.45       8.62   
1989-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --       (0.0300)    (0.9100)     (0.0300)  10.07       9.08      0.46       8.71   
FOR THE PERIOD AUGUST 15, 1988(G) THROUGH OCTOBER 31,                                                                            
- -----------------------------                                                                                                    
1988-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --          --        --           --      (0.1800)      0.1000   10.10       3.30(f)   0.55(b)    8.55(b)
- ------------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                      RATIOS ASSUMING NO
                                      VOLUNTARY WAIVER OF
                                        FEES OR EXPENSE
                                          LIMITATIONS
                                      --------------------
                 
                               NET
                              ASSETS  RATIO OF   RATIO OF
                              AT END  EXPENSES     NET
                                OF       TO     INVESTMENT
                 PORTFOLIO    PERIOD  AVERAGE   INCOME TO
                 TURNOVER      (IN      NET      AVERAGE
                  RATE(D)     000S)    ASSETS   NET ASSETS
                 ----------- -------- --------- ----------
                    SHORT DURATION GOVERNMENT FUND
- ----------------------------------------------------------
<S>              <C>         <C>      <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,
- -----------------
1997-            
Institutional    
Shares..........  102.58%    $103,729   0.82%      6.06%
1997-            
Administration   
Shares..........  102.58        1,060   1.07       5.82
1997-Service     
Shares..........  102.58        3,337   1.32       5.55
1997-Class A     
Shares(o).......  102.58(f)     9,491   1.32(b)    5.43(b)
1997-Class B     
Shares(o).......  102.58(f)       747   1.82(b)    5.00(b)
1997-Class C     
Shares(p).......  102.58(f)       190   1.82(b)    5.15(b)
1996-            
Institutional    
Shares..........  115.45       99,944   0.71       6.18
1996-            
Administration   
Shares(h).......  115.45          252   0.96(b)    5.71(b)
1996-Service     
Shares(i).......  115.45        1,822   1.21(b)    5.79(b)
1995-            
Institutional    
Shares..........  292.56      103,760   0.72       6.60
1995-            
Administration   
Shares..........  292.56          --    0.90(b)    7.71(b)
1994-            
Institutional    
Shares..........  289.79      193,095   0.59       5.55
1994-            
Administration   
Shares..........  289.79          730   0.84       5.24
1993-            
Institutional    
Shares..........  411.66      359,708   0.64       5.31
1993-            
Administration   
Shares(e).......  411.66       16,490   0.80(b)    4.74(b)
1992-            
Institutional    
Shares..........  216.07      277,927   0.69       6.36
1991-            
Institutional    
Shares..........  155.44      158,848   0.79       7.91
1990-            
Institutional    
Shares..........  173.21       68,995   0.95       8.12
1989-            
Institutional    
Shares..........  137.37       31,015   1.39       7.78
FOR THE PERIOD AUGUST 15, 1988(G) THROUGH OCTOBER 31,
- -----------------
1988-            
Institutional    
Shares..........  167.00(f)    39,052   1.42(b)    7.68(b)
- -------------------
</TABLE>
 
                                       10
<PAGE>
 
<TABLE>
<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                           -----------------------------------------------------
                                         NET REALIZED        NET
                                             AND           REALIZED
                                          UNREALIZED         AND
                                         GAIN (LOSS)      UNREALIZED    TOTAL
                                              ON         GAIN (LOSS)    INCOME
                 NET ASSET               INVESTMENT,      ON FOREIGN    (LOSS)
                 VALUE AT     NET         OPTION AND       CURRENCY      FROM     FROM NET
                 BEGINNING INVESTMENT      FUTURES         RELATED    INVESTMENT INVESTMENT
                 OF PERIOD   INCOME      TRANSACTIONS    TRANSACTIONS OPERATIONS   INCOME
                 --------- ----------    ------------    ------------ ---------- ----------
                                           SHORT DURATION TAX-FREE FUND
- -------------------------------------------------------------------------------------------
<S>              <C>       <C>           <C>             <C>          <C>        <C>
FOR THE YEARS ENDED OCTOBER 31,
1997-
Institutional
Shares..........  $ 9.96     $0.4181(a)    $ 0.1091(a)       --        $ 0.5272   $(0.4172)
1997-
Administration
Shares..........    9.96      0.3924(a)      0.1100(a)       --          0.5024    (0.3924)
1997-Service
Shares..........    9.97      0.3675(a)      0.1000(a)       --          0.4675    (0.3675)
1997-Class A
Shares(o).......    9.94      0.1950(a)      0.1400(a)       --          0.3350    (0.1950)
1997-Class B
Shares(o).......    9.94      0.1663(a)      0.1368(a)       --          0.3031    (0.1631)
1997-Class C
Shares(p).......   10.04      0.0670(a)      0.0300(a)       --          0.0970    (0.0670)
1996-
Institutional
Shares..........    9.94      0.4192(a)      0.0200(a)       --          0.4392    (0.4192)
1996-
Administration
Shares..........    9.94      0.3944(a)      0.0200(a)       --          0.4144    (0.3944)
1996-Service
Shares..........    9.95      0.3697(a)      0.0200(a)       --          0.3897    (0.3697)
1995-
Institutional
Shares..........    9.79      0.4235(a)      0.1500(a)       --          0.5735    (0.4235)
1995-
Administration
Shares..........    9.79      0.3989(a)      0.1500(a)       --          0.5489    (0.3989)
1995-Service
Shares..........    9.79      0.3744(a)      0.1600(a)       --          0.5344    (0.3744)
1994-
Institutional
Shares..........   10.23      0.3787(a)     (0.3575)(a)      --          0.0212    (0.3787)
1994-
Administration
Shares..........   10.23      0.3537(a)     (0.3575)(a)      --         (0.0038)   (0.3537)
1994-Service
Shares(j).......    9.86      0.0475(a)     (0.0700)(a)      --         (0.0225)   (0.0475)
1993-
Institutional
Shares..........    9.93      0.3834(a)      0.3000(a)       --          0.6834    (0.3834)
1993-
Administration
Shares(j).......   10.16      0.1555(a)      0.0720(a)       --          0.2275    (0.1555)
FOR THE PERIOD OCTOBER 1, 1992(G) THROUGH OCTOBER 31,
1992-
Institutional
Shares..........   10.00   0.0341(a)      . (0.0700)(a)      --         (0.0359)   (0.0341)
- --------------------------------------------------------------------------------------------
<CAPTION>
                                                                                                                               
                                                                                                                               
                                                                                                                               
                          DISTRIBUTIONS TO SHAREHOLDERS                                                                        
                 ----------------------------------------------------------                                                    
                                          IN EXCESS                                                                            
                   FROM NET                 OF NET                                                        RATIO OF             
                   REALIZED                REALIZED                            NET      NET                 NET      RATIO OF  
                   GAIN ON                 GAIN ON                           INCREASE  ASSET              EXPENSES     NET     
                 INVESTMENT,  IN EXCESS  INVESTMENT,   FROM       TOTAL     (DECREASE) VALUE                 TO     INVESTMENT 
                  OPTION AND    OF NET    OPTION AND   PAID   DISTRIBUTIONS   IN NET   AT END             AVERAGE   INCOME TO  
                   FUTURES    INVESTMENT   FUTURES      IN         TO         ASSET      OF     TOTAL       NET      AVERAGE   
                 TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL SHAREHOLDERS    VALUE    PERIOD RETURN(K)    ASSETS   NET ASSETS 
                 ------------ ---------- ------------ ------- ------------- ---------- ------ ----------- --------- ---------- 
                                                  SHORT DURATION TAX-FREE FUND
- -------------------------------------------------------------------------------------------------------------------------------
<S>              <C>          <C>        <C>          <C>     <C>           <C>        <C>    <C>         <C>       <C>        
FOR THE YEARS ENDED OCTOBER 31,                                                                                                
1997-                                                                                                                          
Institutional                                                                                                                  
Shares..........       --        --          --         --      $(0.4172)    $ 0.1100  $10.07    5.40%      0.45%      4.18%   
1997-                                                                                                                          
Administration                                                                                                                 
Shares..........       --        --          --         --       (0.3924)      0.1100   10.07    5.14       0.70       3.91    
1997-Service                                                                                                                   
Shares..........       --        --          --         --       (0.3675)      0.1000   10.07    4.77       0.95       3.66    
1997-Class A                                                                                                                   
Shares(o).......       --        --          --         --       (0.1950)      0.1400   10.08    3.39(f)    0.70(b)    3.81(b) 
1997-Class B                                                                                                                   
Shares(o).......       --        --          --         --       (0.1631)      0.1400   10.08    3.07(f)    1.30(b)    3.31(b) 
1997-Class C                                                                                                                   
Shares(p).......       --        --          --         --       (0.0670)      0.0300   10.07    0.97(f)    1.45(b)    2.60(b) 
1996-                                                                                                                          
Institutional                                                                                                                  
Shares..........       --        --          --         --       (0.4192)      0.0300    9.96    4.50       0.45       4.21    
1996-                                                                                                                          
Administration                                                                                                                 
Shares..........       --        --          --         --       (0.3944)      0.0300    9.96    4.24       0.70       3.96    
1996-Service                                                                                                                   
Shares..........       --        --          --         --       (0.3697)      0.0200    9.97    3.98       0.95       3.74    
1995-                                                                                                                          
Institutional                                                                                                                  
Shares..........       --        --          --         --       (0.4235)      0.1500    9.94    5.98       0.45       4.31    
1995-                                                                                                                          
Administration                                                                                                                 
Shares..........       --        --          --         --       (0.3989)      0.1500    9.94    5.76       0.70       4.14    
1995-Service                                                                                                                   
Shares..........       --        --          --         --       (0.3744)      0.1600    9.95    5.59       0.95       3.87    
1994-                                                                                                                          
Institutional                                                                                                                  
Shares..........   (0.0825)      --          --         --       (0.4612)     (0.4400)   9.79    0.17       0.45       3.74    
1994-                                                                                                                          
Administration                                                                                                                 
Shares..........   (0.0825)      --          --         --       (0.4362)     (0.4400)   9.79   (0.11)      0.70       3.51    
1994-Service                                                                                                                   
Shares(j).......       --        --          --         --       (0.0475)     (0.0700)   9.79   (0.32)(f)   0.95(b)    4.30(b) 
1993-                                                                                                                          
Institutional                                                                                                                  
Shares..........       --        --          --         --       (0.3834)      0.3000   10.23    7.03       0.41       3.70    
1993-                                                                                                                          
Administration                                                                                                                 
Shares(j).......       --        --          --         --       (0.1555)      0.0720   10.23    2.28(f)    0.70(b)    3.32(b) 
FOR THE PERIOD OCTOBER 1, 1992(G) THROUGH OCTOBER 31,                                                                          
1992-                                                                                                                          
Institutional                                                                                                                  
Shares..........       --        --          --         --       (0.0341)     (0.0700)   9.93   (0.34)(f)   0.05(b)    4.58(b) 
<CAPTION>
                                     RATIOS ASSUMING NO
                                     VOLUNTARY WAIVER OF
                                       FEES OR EXPENSE
                                         LIMITATIONS
                                     --------------------
                
                              NET
                             ASSETS  RATIO OF   RATIO OF
                             AT END  EXPENSES     NET
                               OF       TO     INVESTMENT
                PORTFOLIO    PERIOD  AVERAGE   INCOME TO
                TURNOVER      (IN      NET      AVERAGE
                 RATE(D)     000S)    ASSETS   NET ASSETS
                ----------- -------- --------- ----------
                     SHORT DURATION TAX-FREE FUND
- ---------------------------------------------------------
<S>             <C>         <C>      <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,                                                                                                
1997-           
Institutional   
Shares.......... 194.75%    $ 28,821   1.23%      3.40%
1997-           
Administration  
Shares.......... 194.75           77   1.48       3.13
1997-Service    
Shares.......... 194.75        2,051   1.73       2.88
1997-Class A    
Shares(o)....... 194.75(f)     4,023   1.73(b)    2.78(b)
1997-Class B    
Shares(o)....... 194.75(f)       106   2.23(b)    2.38(b)
1997-Class C    
Shares(p)....... 194.75(f)         2   2.23(b)    1.82(b)
1996-           
Institutional   
Shares.......... 231.65       34,814   1.01       3.65
1996-           
Administration  
Shares.......... 231.65           48   1.26       3.40
1996-Service    
Shares.......... 231.65          695   1.51       3.18
1995-           
Institutional   
Shares.......... 259.52       58,389   0.77       3.99
1995-           
Administration  
Shares.......... 259.52           46   1.02       3.82
1995-Service    
Shares.......... 259.52          454   1.27       3.55
1994-           
Institutional   
Shares.......... 354.00       83,704   0.61       3.58
1994-           
Administration  
Shares.......... 354.00        3,866   0.86       3.35
1994-Service    
Shares(j)....... 354.00          440   1.11(b)    4.14(b)
1993-           
Institutional   
Shares.......... 404.60      115,803   1.06       3.05
1993-           
Administration  
Shares(j)....... 404.60          911   1.07(b)    2.95(b)
FOR THE PERIOD OCTOBER 1, 1992(G) THROUGH OCTOBER 31,                                                                          
1992-           
Institutional   
Shares..........  31.19(f)    14,601   2.68(b)    1.95(b)
- -------------------------------------------------------
</TABLE>
 
                                       11
<PAGE>
 
<TABLE>
<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)                       DISTRIBUTIONS TO SHAREHOLDERS
                           ----------------------------------------------- -------------------------------------------------------
                                      NET REALIZED     NET
                                          AND        REALIZED                                                  IN EXCESS
                                       UNREALIZED      AND                              FROM NET                 OF NET
                                      GAIN (LOSS)   UNREALIZED    TOTAL                 REALIZED                REALIZED
                                           ON      GAIN (LOSS)    INCOME                GAIN ON                 GAIN ON
                 NET ASSET            INVESTMENT,   ON FOREIGN    (LOSS)              INVESTMENT,  IN EXCESS  INVESTMENT,   FROM
                 VALUE AT     NET      OPTION AND    CURRENCY      FROM     FROM NET   OPTION AND    OF NET    OPTION AND   PAID
                 BEGINNING INVESTMENT   FUTURES      RELATED    INVESTMENT INVESTMENT   FUTURES    INVESTMENT   FUTURES      IN
                 OF PERIOD   INCOME   TRANSACTIONS TRANSACTIONS OPERATIONS   INCOME   TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL
                 --------- ---------- ------------ ------------ ---------- ---------- ------------ ---------- ------------ -------
<S>              <C>       <C>        <C>          <C>          <C>        <C>        <C>          <C>        <C>          <C>
                                                            GOVERNMENT INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
FOR THE YEARS ENDED OCTOBER 31,
- ---------------------
1997-Class A
Shares            $14.36     $0.91       $0.29          --        $1.20      $(0.90)     $(0.07)        --          --        --
1997-Class B
Shares             14.37      0.80        0.30          --         1.10       (0.79)      (0.07)        --          --        --
1997-Class C
Shares(p)          14.38      0.17        0.22          --         0.39       (0.17)         --         --          --        --
1997-
Institutional
Shares(p)          14.37      0.20        0.22          --         0.42       (0.20)         --         --          --        --
1997-Service
Shares(p)          14.37      0.20        0.21          --         0.41       (0.19)         --         --          --        --
1996-Class A
shares             14.47      0.92       (0.11)         --         0.81       (0.92)         --         --          --        --
1996-Class B
shares(q)          14.11      0.41        0.26          --         0.67       (0.41)         --         --          --        --
1995-Class A
shares             13.47      0.94        1.00          --         1.94       (0.94)         --         --          --        --
1994-Class A
shares             14.90      0.85       (1.28)         --        (0.43)      (0.85)      (0.12)     (0.02)      (0.01)       --
FOR THE PERIOD FEBRUARY 10, 1993(G) THROUGH OCTOBER 31,
- ---------------------------------------
1993-Class A
shares             14.32      0.56        0.58          --         1.14       (0.56)         --         --          --        --

<CAPTION>  
                                                       MUNICIPAL INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>          <C>          <C>        <C>        <C>          <C>        <C>          <C>
FOR THE YEARS ENDED OCTOBER 31,
- ---------------------
1997-Class A
Shares            $14.37     $0.67       $0.62         --         $1.29      $(0.67)        --         --          --        --
1997-Class B
Shares             14.37      0.56        0.63         --          1.19       (0.56)        --         --          --        --
1997-Class C
Shares(p)          14.85      0.12        0.14         --          0.26       (0.12)        --         --          --        --
1997-
Institutional
Shares(p)          14.84      0.15        0.16         --          0.31       (0.15)        --         --          --        --
1997-Service
Shares(p)          14.84      0.14        0.15         --          0.29       (0.14)        --         --          --        --
1996-Class A
shares             14.17      0.65        0.20         --          0.85       (0.65)        --         --          --        --
1996-Class B
shares(q)          14.03      0.27        0.34         --          0.61       (0.27)        --         --          --        --
1995-Class A
shares             13.08      0.67        1.09         --          1.76       (0.67)        --         --          --        --
1994-Class A
shares             14.64      0.73       (1.51)        --         (0.78)      (0.73)      (0.05)       --          --        --
FOR THE PERIOD JULY 20, 1993(G) THROUGH OCTOBER 31,
- ------------------------------------
1993-Class A
shares             14.32      0.22        0.32         --          0.54       (0.22)        --         --          --        --
- ----------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                                                     RATIOS ASSUMING NO
                                                                                                     VOLUNTARY WAIVER OF
                                                                                                       FEES OR EXPENSE
                                                                                                         LIMITATIONS
                                                                                                     --------------------
                                                            RATIO OF   RATIO OF                NET              RATIO OF
                                  NET      NET                NET        NET                 ASSETS  RATIO OF     NET
                                INCREASE  ASSET             EXPENSES  INVESTMENT             AT END  EXPENSES  INVESTMENT
                     TOTAL     (DECREASE) VALUE                TO       INCOME                 OF       TO       INCOME
                 DISTRIBUTIONS   IN NET   AT END            AVERAGE   (LOSS) TO  PORTFOLIO   PERIOD  AVERAGE   (LOSS) TO
                      TO         ASSET      OF     TOTAL      NET      AVERAGE   TURNOVER      (IN     NET      AVERAGE
                 SHAREHOLDERS    VALUE    PERIOD RETURN(K)   ASSETS   NET ASSETS  RATE(D)     000S)   ASSETS   NET ASSETS
                 ------------- ---------- ------ ---------- --------- ---------- ----------- ------- --------- ----------
<S>              <C>           <C>        <C>    <C>        <C>       <C>        <C>         <C>     <C>       <C>
                                                         GOVERNMENT INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
FOR THE YEARS ENDED OCTOBER 31,
- ---------------------
1997-Class A
Shares              $(0.97)      $0.23    $14.59    8.72%     0.50%      6.38%    395.75%    $68,859   1.82%      5.06%
1997-Class B
Shares               (0.86)       0.24     14.61    7.96      1.25       5.59     395.75       8,041   2.32       4.52
1997-Class C
Shares(p)            (0.17)       0.22     14.60    2.72(f)   1.25(b)    5.45(b)  395.75(f)    1,196   2.32(b)    4.38(b)
1997-
Institutional
Shares(p)            (0.20)       0.22     14.59    2.94(f)   0.25(b)    7.03(b)  395.75(f)    1,894   1.32(b)    5.96(b)
1997-Service
Shares(p)            (0.19)       0.22     14.59    2.85(f)   0.75(b)    6.49(b)  395.75(f)        2   1.82(b)    5.42(b)
1996-Class A
shares               (0.92)      (0.11)    14.36    5.80      0.75       6.42     485.09      30,603   1.89       5.03
1996-Class B
shares(q)            (0.41)       0.26     14.37    4.85(f)   1.25(b)    5.65(b)  485.09         234   2.39(b)    4.51(b)
1995-Class A
shares               (0.94)       1.00     14.47   14.90      0.47       6.67     449.53      29,503   2.34       4.80
1994-Class A
shares               (1.00)      (1.43)    13.47   (2.98)     0.11       6.06     654.90      14,452   2.86       3.31
FOR THE PERIOD FEBRUARY 10, 1993(G) THROUGH OCTOBER 31,
- ---------------------------------------
1993-Class A
shares               (0.56)       0.58     14.90    8.03(f)   0.00(b)    4.87(e)  725.41(f)   12,860   4.00(b)

<CAPTION> 
                                                       MUNICIPAL INCOME FUND
- -----------------------------------------------------------------------------------------------------------------------
<S>              <C>           <C>        <C>    <C>        <C>       <C>        <C>         <C>     <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,
- ---------------------
1997-Class A
Shares              $(0.67)      $0.62    $14.99    9.23%     0.85%      4.60%    153.12%    $64,553   1.62%      3.83%
1997-Class B
Shares               (0.56)       0.63     15.00    8.48      1.60       3.74     153.12       1,750   2.12       3.22
1997-Class C
Shares(p)            (0.12)       0.14     14.99    1.75(f)   1.60(b)    3.24(b)  153.12(f)      130   2.12(b)    2.72(b)
1997-
Institutional
Shares(p)            (0.15)       0.16     15.00    2.10(f)   0.60(b)    4.41(b)  153.12(f)      351   1.12(b)    3.89(b)
1997-Service
Shares(p)            (0.14)       0.15     14.99    1.93(f)   1.10(b)    4.24(b)  153.12(f)        2   1.62(b)    3.72(b)
1996-Class A
shares               (0.65)       0.20     14.37    6.13      0.85       4.58     344.13      52,267   1.55       3.88
1996-Class B
shares(q)            (0.27)       0.34     14.37    4.40(f)   1.60(b)    3.55(b)  344.13(f)      255   2.05(b)    3.10(b)
1995-Class A
shares               (0.67)       1.09     14.17   13.79      0.76       4.93     335.55      53,797   1.49       4.20
1994-Class A
shares               (0.78)      (1.56)    13.08   (5.51)     0.45       5.28     357.54      47,373   1.55       4.18
FOR THE PERIOD JULY 20, 1993(G) THROUGH OCTOBER 31,
- ------------------------------------
1993-Class A
shares               (0.22)       0.32     14.64    3.73(f)   0.00(b)    5.15(b)   99.99(f)   30,166   2.42(b)    2.73(b)
- ----------------------------------------------------------------------------------------------------------------------
</TABLE>
 
                                       12
<PAGE>
 
<TABLE>
<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)                       DISTRIBUTIONS TO SHAREHOLDERS
                           ----------------------------------------------- -------------------------------------------------------
                                      NET REALIZED     NET
                                          AND        REALIZED                                                  IN EXCESS
                                       UNREALIZED      AND                              FROM NET                 OF NET
                                      GAIN (LOSS)   UNREALIZED    TOTAL                 REALIZED                REALIZED
                                           ON      GAIN (LOSS)    INCOME                GAIN ON                 GAIN ON
                 NET ASSET            INVESTMENT,   ON FOREIGN    (LOSS)              INVESTMENT,  IN EXCESS  INVESTMENT,   FROM
                 VALUE AT     NET      OPTION AND    CURRENCY      FROM     FROM NET   OPTION AND    OF NET    OPTION AND   PAID
                 BEGINNING INVESTMENT   FUTURES      RELATED    INVESTMENT INVESTMENT   FUTURES    INVESTMENT   FUTURES      IN
                 OF PERIOD   INCOME   TRANSACTIONS TRANSACTIONS OPERATIONS   INCOME   TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL
                 --------- ---------- ------------ ------------ ---------- ---------- ------------ ---------- ------------ -------
                                                      CORE FIXED INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>          <C>          <C>        <C>        <C>          <C>        <C>          <C>
FOR THE YEARS ENDED OCTOBER 31,
- ---------------------
1997-
Institutional
Shares            $ 9.85    $0.6431     $0.2282      $(0.0005)   $ 0.8708   $(0.6408)       --        --          --          --
1997-
Administration
Shares              9.84     0.6182      0.2380       (0.0005)     0.8557    (0.6157)       --        --          --          --
1997-Service
Shares              9.86     0.5937      0.2287       (0.0005)     0.8219    (0.5919)       --        --          --          --
1997-Class A
Shares(o)           9.70     0.3059      0.3596       (0.0008)     0.6647    (0.3048)       --        --          --          --
1997-Class B
Shares(o)           9.72     0.2686      0.3695       (0.0008)     0.6373    (0.2673)       --        --          --          --
1997-Class C
Shares(p)           9.93     0.1118      0.1591       (0.0003)     0.2706    (0.1107)       --        --          --          --
1996-
Institutional
Shares             10.00     0.6448     (0.0704)          --       0.5744    (0.6438)   (0.0806)      --          --          --
1996-
Administration
Shares(/1/)         9.91     0.4083     (0.0703)          --       0.3380    (0.4080)       --        --          --          --
1996-Service
Shares(l)           9.77     0.3756      0.0898           --       0.4654    (0.3754)       --        --          --          --
1995-
Institutional
Shares              9.24     0.6423      0.7610           --       1.4033    (0.6433)       --        --          --          --
FOR THE PERIOD JANUARY 5, 1994(G) THROUGH OCTOBER 31,
- ----------------------------------
1994-
Institutional
Shares             10.00     0.4648     (0.7617)          --      (0.2969)   (0.4648)       --        --          --          --

<CAPTION>  
                                                        GLOBAL INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>          <C>          <C>        <C>        <C>          <C>        <C>          <C>

FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Class A
shares            $14.53    $  0.59     $  0.50      $   0.27    $   1.36   $  (0.79)        --        --          --          --
1997-Class B
shares             14.53       0.72        0.36          0.20        1.28      (0.73)        --        --          --          --
1997-Class C
shares(p)          14.80       0.16        0.19          0.10        0.45      (0.19)        --        --          --          --
1997-
Institutional
Shares             14.52       0.88        0.37          0.19        1.44      (0.87)        --        --          --          --
1997-Service
Shares(s)          14.69       0.53        0.25          0.14        0.92      (0.52)        --        --          --          --
1996-Class A
shares             14.45       0.71        0.62          0.18        1.51      (1.43)        --        --          --          --
1996-Class B
shares(q)          14.03       0.34        0.41          0.11        0.86      (0.36)        --        --          --          --
1996-
Institutional
shares             14.45       1.15        0.32          0.10        1.57      (1.50)        --        --          --          --
1995-Class A
shares             13.43       0.89        0.92          0.15        1.96      (0.94)        --        --          --          --
1995-
Institutional
shares(r)          14.09       0.22        0.34          0.06        0.62      (0.26)        --        --          --          --
1994-Class A
shares             15.07       0.84       (1.37)        (0.12)      (0.65)     (0.22)     (0.16)       --          --       (0.61)
1993-Class A
shares             14.69       0.85        1.07         (0.42)       1.50      (0.85)     (0.27)       --          --          --
1992-Class A
shares             14.60       1.14        0.45         (0.36)       1.23      (1.14)        --        --          --          --

FOR THE PERIOD AUGUST 2, 1991(G) THROUGH OCTOBER 31,
- ----------------------------------------------------
1991-Class A
shares             14.55       0.25        0.23         (0.19)       0.29      (0.24)        --        --          --          --
- ----------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                                                          RATIOS ASSUMING NO
                                                                                                          VOLUNTARY WAIVER OF
                                                                                                            FEES OR EXPENSE
                                                                                                              LIMITATIONS
                                                                                                          --------------------
                                                            RATIO OF     RATIO OF                  NET               RATIO OF
                                  NET      NET                NET          NET                    ASSETS  RATIO OF     NET
                                INCREASE  ASSET             EXPENSES    INVESTMENT                AT END  EXPENSES  INVESTMENT
                     TOTAL     (DECREASE) VALUE                TO         INCOME                    OF       TO       INCOME
                 DISTRIBUTIONS   IN NET   AT END            AVERAGE     (LOSS) TO    PORTFOLIO    PERIOD  AVERAGE   (LOSS) TO
                      TO         ASSET      OF     TOTAL      NET        AVERAGE     TURNOVER      (IN      NET      AVERAGE
                 SHAREHOLDERS    VALUE    PERIOD RETURN(K)   ASSETS     NET ASSETS    RATE(D)     000S)    ASSETS   NET ASSETS
                 ------------- ---------- ------ ---------- ----------- ------------ ----------- -------- --------- ----------
                                                      CORE FIXED INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>           <C>        <C>    <C>        <C>         <C>          <C>         <C>      <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,
- ---------------------
1997-
Institutional
Shares             $(0.6408)    $ 0.2300  $10.08    9.19%      0.45%        6.53%     361.27%     $79,230   0.83%      6.15%
1997-
Administration
Shares              (0.6157)      0.2300   10.07    8.92       0.70         6.27      361.27        6,176   1.08       5.89
1997-Service
Shares              (0.5919)      0.2300   10.09    8.65       0.95         6.00      361.27        1,868   1.33       5.62
1997-Class A
Shares(o)           (0.3048)      0.3599   10.06    6.94(f)    0.70(b)      6.13(b)   361.27(f)     9,336   1.33(b)    5.50(b)
1997-Class B
Shares(o)           (0.2673)      0.3700   10.09    6.63(f)    1.45(b)      5.28(b)   361.27(f)       621   1.83(b)    4.90(b)
1997-Class C
Shares(p)           (0.1107)      0.1599   10.09    2.74(f)    1.45(b)      4.84(b)   361.27(f)       272   1.83(b)    4.46(b)
1996-
Institutional
Shares              (0.7244)     (0.1500)   9.85    5.98       0.45         6.51      414.20       72,061   0.83       6.13
1996-
Administration
Shares(/1/)         (0.4080)     (0.0700)   9.84    3.56(f)    0.70(b)      6.41(b)   414.20          702   1.08(b)    6.03(b)
1996-Service
Shares(l)           (0.3754)      0.0900    9.86    4.90(f)    0.95(b)      6.37(b)   414.20          381   1.33(b)    5.99(b)
1995-
Institutional
Shares              (0.6433)      0.7600   10.00   15.72       0.45         6.56      382.26       55,502   0.96       6.05
FOR THE PERIOD JANUARY 5, 1994(G) THROUGH OCTOBER 31,
- ----------------------------------
1994-
Institutional
Shares              (0.4648)     (0.7617)   9.24   (3.00)   0.45(b)      6.48(b)      285.25       24,508   1.46(b)    5.47(b)

<CAPTION>  
                                                        GLOBAL INCOME FUND
- ----------------------------------------------------------------------------------------------------------------------------------
<S>              <C>           <C>        <C>    <C>        <C>         <C>          <C>         <C>      <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Class A
shares             $  (0.79)    $   0.57  $15.10    9.66%      1.17%        5.19%     383.72%    $167,096   1.60%      4.76%
1997-Class B
shares                (0.73)        0.55   15.08    9.04       1.71         4.76      383.72        3,465   2.10       4.37
1997-Class C
shares(p)             (0.19)        0.26   15.06    3.03(f)    1.71(b)      4.98(b)   383.72(f)       496   2.10(b)    4.59(b)
1997-
Institutional
Shares                (0.87)        0.57   15.09   10.26       0.65         5.72      383.72       60,929   1.04       5.33
1997-Service
Shares(s)             (0.52)        0.40   15.09    6.42(f)    1.15(b)      5.33(b)   383.72(f)       151   1.54(b)    4.94(b)
1996-Class A
shares                (1.43)        0.08   14.53   11.05       1.16         5.81      232.15      198,665   1.64       5.33
1996-Class B
shares(q)             (0.36)        0.50   14.53    6.24(f)    1.70(b)      5.16(b)   232.15(f)       256   2.14(b)    4.72(b)
1996-
Institutional
shares                (1.50)        0.07   14.52   11.55       0.65         6.35      232.15       54,254   1.11       5.89
1995-Class A
shares                (0.94)        1.02   14.45   15.08       1.29         6.23      265.86      245,835   1.58       5.94
1995-
Institutional
shares(r)             (0.26)        0.36   14.45    4.42(f)    0.65(b)      6.01(b)   265.86(f)    31,619   1.08(b)    5.58(b)
1994-Class A
shares                (0.99)       (1.64)  13.43   (4.49)      1.28         5.73      343.74      396,584   1.53       5.48
1993-Class A
shares                (1.12)        0.38   15.07   10.75       1.30         5.78      313.88      675,662   1.55       5.53
1992-Class A
shares                (1.14)        0.09   14.69    8.77       1.37         7.85      270.75      588,893   1.62       7.60
FOR THE PERIOD AUGUST 2, 1991(G) THROUGH OCTOBER 31,
- ----------------------------------------------------
1991-Class A
shares                (0.24)        0.05   14.60    2.00(f)    0.38(f)      1.72(f)    34.22(f)   388,744   0.44(f)    1.66(f)
</TABLE>
 
                                       13
<PAGE>
 
<TABLE>
<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)                       DISTRIBUTIONS TO SHAREHOLDERS
                           ----------------------------------------------- -------------------------------------------------------
                                      NET REALIZED     NET
                                          AND        REALIZED                                                  IN EXCESS
                                       UNREALIZED      AND                              FROM NET                 OF NET
                                      GAIN (LOSS)   UNREALIZED    TOTAL                 REALIZED                REALIZED
                                           ON      GAIN (LOSS)    INCOME                GAIN ON                 GAIN ON
                 NET ASSET            INVESTMENT,   ON FOREIGN    (LOSS)              INVESTMENT,  IN EXCESS  INVESTMENT,   FROM
                 VALUE AT     NET      OPTION AND    CURRENCY      FROM     FROM NET   OPTION AND    OF NET    OPTION AND   PAID
                 BEGINNING INVESTMENT   FUTURES      RELATED    INVESTMENT INVESTMENT   FUTURES    INVESTMENT   FUTURES      IN
                 OF PERIOD   INCOME   TRANSACTIONS TRANSACTIONS OPERATIONS   INCOME   TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL
                 --------- ---------- ------------ ------------ ---------- ---------- ------------ ---------- ------------ -------
<S>              <C>       <C>        <C>          <C>          <C>        <C>        <C>          <C>        <C>          <C>
                                                                                                    HIGH YIELD FUND
- ----------------------------------------------------------------------------------------------------------------------------------
FOR THE PERIOD AUGUST 1, 1997(G) THROUGH OCTOBER 31,
- ----------------------------------------------------
1997-Class A
Shares            $10.00     $0.17       $(0.03)       0.01       $0.15      $(0.17)      --         $(0.01)      --         --
1997-Class B
Shares             10.00      0.15        (0.03)       0.01        0.13       (0.15)      --          (0.01)      --         --
1997-Class C
Shares(p)           9.97      0.14          --         0.01        0.12       (0.14)      --          (0.01)      --         --
1997-
Institutional
Shares             10.00      0.18        (0.03)       0.01        0.16       (0.18)      --          (0.01)      --         --
1997-Service
Shares             10.00      0.17        (0.03)       0.01        0.15       (0.17)      --          (0.01)      --         --
- ----------------------------------------------------------------------------------------------------------------------------------
<CAPTION>
                                                                                                         RATIOS ASSUMING NO
                                                                                                         VOLUNTARY WAIVER OF
                                                                                                           FEES OR EXPENSE
                                                                                                             LIMITATIONS
                                                                                                         ----------------------
                                                             RATIO OF    RATIO OF                 NET                RATIO OF
                                  NET      NET                 NET         NET                   ASSETS  RATIO OF      NET
                                INCREASE  ASSET              EXPENSES   INVESTMENT               AT END  EXPENSES   INVESTMENT
                     TOTAL     (DECREASE) VALUE                 TO        INCOME                   OF       TO        INCOME
                 DISTRIBUTIONS   IN NET   AT END             AVERAGE    (LOSS) TO   PORTFOLIO    PERIOD  AVERAGE    (LOSS) TO
                      TO         ASSET      OF     TOTAL       NET       AVERAGE    TURNOVER      (IN      NET       AVERAGE
                 SHAREHOLDERS    VALUE    PERIOD RETURN(K)    ASSETS    NET ASSETS   RATE(D)     000S)    ASSETS    NET ASSETS
                 ------------- ---------- ------ ----------- ---------- ----------- ----------- -------- ---------- -----------
<S>              <C>           <C>        <C>    <C>         <C>        <C>         <C>         <C>      <C>        <C>
- ----------------------------------------------------------------------------------------------------------------------------------
FOR THE PERIOD AUGUST 1, 1997(G) THROUGH OCTOBER 31,
- ----------------------------------------------------
1997-Class A
Shares              $(0.18)      $(0.03)  $9.97    1.50%(f)    0.95%(b)    7.06%(b)   44.80%(f) $325,911   1.57%(b)    6.44%(b)
1997-Class B
Shares               (0.16)       (0.03)   9.97    1.31(f)     1.70(b)     6.28(e)    44.80(f)    10.308   2.07(b)     5.91(b)
1997-Class C
Shares(p)            (0.15)       (0.03)   9.97    1.46(f)     1.70(b)     6.17(b)    44.80(f)     1,791   2.07(b)     5.80(b)
1997-
Institutional
Shares               (0.19)       (0.03)   9.97    1.58(f)     0.70(b)     7.16(b)    44.80(f)         2   1.07(b)     6.79(b)
1997-Service
Shares               (0.18)       (0.03)   9.97    1.46(f)     1.20(b)     6.69(b)    44.80(f)         2   1.57(b)     6.32(b)
- ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>
(a)Calculated based on the average shares outstanding methodology.
(b)Annualized.
(c)Class A share activity commenced on May 15, 1995.
(d)Includes the effect of mortgage dollar roll transactions.
(e)Administration share activity commenced on April 15, 1993.
(f)Not annualized.
(g)Commencement of operations.
(h)Short Duration Government Fund Administration shares were redeemed in full
on February 23, 1995 and re-commenced on February 28, 1996 at $9.86.
(i)Service share activity commenced on April 10, 1996.
(j)Administration and service share activity commenced on May 20, 1993 and
   September 20, 1994, respectively.
(k)Assumes investment at the net asset value at the beginning of the period,
   reinvestment of all dividends and distributions, a complete redemption of
   the investment at the net asset value at the end of the period and no
   sales charges. Total return would be reduced if a sales charge for Class A
   shares or a contingent deferred sales charge for Class B and Class C
   shares were taken into account.
(l)Administration and Service share activity commenced on February 28, 1996
   and March 13, 1996, respectively.
(m)Service share activity commenced on March 27, 1997.
(n)Includes the balancing effect of calculating per share amounts.
(o)Class A and Class B share activity commenced on May 1, 1997.
(p)Commenced operations on August 15, 1997.
(q)Class B shares commenced operations on May 1, 1996.
(r)Institutional shares commenced operations on August 1, 1995.
(s)Service Class shares commenced operations on March 12, 1997.
- -------------------------------------------------------------------------------
 
                                       14
<PAGE>
 
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
 
  The investment objectives and principal investment policies of each Fund are
described below. Other investment practices and management techniques, which
involve certain risks, are described under "Description of Securities," "Risk
Factors" and "Investment Techniques." There can be no assurance that a Fund's
investment objectives will be achieved.
 
  A Fund's duration approximates its price sensitivity to changes in interest
rates. Maturity measures the time until final payment is due; it takes no
account of the pattern of a security's cash flows over time. In computing
portfolio duration, a Fund will estimate the duration of obligations that are
subject to prepayment or redemption by the issuer taking into account the
influence of interest rates on prepayments and coupon flows. This method of
computing duration is known as "option-adjusted" duration. A Fund will not be
limited as to its maximum weighted average portfolio maturity or the maximum
stated maturity with respect to individual securities unless otherwise noted.
 
  A Fund will deem a security to have met its minimum credit rating
requirement if the security receives the minimum required long-term rating (or
the equivalent short-term credit rating) at the time of purchase from at least
one nationally recognized statistical rating organization ("NRSRO") including,
but not limited to, Standard & Poor's Ratings Group ("S&P") and Moody's
Investors Service, Inc. ("Moody's") even though it has been rated below the
minimum rating by one or more other NRSROs or, if unrated, is determined by
the Investment Adviser to be of comparable quality. If a security satisfies a
Fund's minimum rating criteria at the time of purchase and is subsequently
downgraded below such rating, the Fund will not be required to dispose of such
security. If a downgrade occurs, the Investment Adviser will consider what
action, including the sale of such security, is in the best interest of a Fund
and its shareholders.
 
  The Investment Adviser will usually have access to the research of, and
certain proprietary technical models developed by, Goldman Sachs and will
apply quantitative and qualitative analysis in determining the appropriate
allocations among the categories of issuers and types of securities.
 
 ADJUSTABLE RATE GOVERNMENT FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income, consistent with low volatility of principal.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be in a range approximately equal to that of a six-month to one-
year U.S. Treasury security. In addition, under normal interest rate
conditions, the Fund's maximum duration will not exceed two years. The
approximate interest rate sensitivity of the Fund is expected to be comparable
to a nine-month note.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in U.S. Government Securities that are adjustable rate
mortgage pass-through securities and other mortgage securities with periodic
interest rate resets. The remainder of the Fund's assets (up to 35%) may be
invested in other U.S. Government Securities, including fixed rate mortgage
pass-through securities, other securities representing an interest in or
collateralized by adjustable rate and fixed rate mortgage loans ("Mortgage-
Backed Securities") and repurchase agreements collateralized by U.S.
Government Securities. Substantially all of the Fund's assets
 
                                      15
<PAGE>
 
will be invested in U.S. Government Securities. 100% of the Fund's portfolio
will be invested in U.S. dollar-denominated securities.
 
  CREDIT QUALITY. The Fund invests in U.S. Government Securities and
repurchase agreements collateralized by such securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), mortgage and
interest rate swaps and interest rate floors, caps and collars. The Fund may
also employ other investment techniques to seek to enhance returns, such as
lending portfolio securities and entering into mortgage dollar rolls,
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 SHORT DURATION GOVERNMENT FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide a high level of
current income. Secondarily, the Fund may, in seeking current income, also
consider the potential for capital appreciation.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the two-year U.S.
Treasury security, plus or minus .5 years. In addition, under normal interest
rate conditions, the Fund's maximum duration will not exceed three years. The
approximate interest rate sensitivity of the Fund is expected to be comparable
to a two-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal market conditions, at
least 65% of its total assets in U.S. Government Securities and in repurchase
agreements collateralized by such securities. Substantially all of the Fund's
assets will be invested in U.S. Government Securities. 100% of the Fund's
portfolio will be invested in U.S. dollar-denominated securities.
 
  CREDIT QUALITY. The Fund invests in U.S. Government Securities and
repurchase agreements collateralized by such securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), mortgage and
interest rate swaps and interest rate floors, caps and collars. The Fund may
also employ other investment techniques to seek to enhance returns, such as
lending portfolio securities and entering into mortgage dollar rolls,
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 SHORT DURATION TAX-FREE FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income, consistent with relatively low volatility of
principal, that is exempt from regular federal income tax.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
three-year Municipal Bond Index, plus or minus .5 years. In addition, under
normal interest rate conditions, the Fund's maximum duration will not exceed
four years. The approximate interest rate sensitivity of the Fund is expected
to be comparable to a three-year bond.
 
                                      16
<PAGE>
 
  INVESTMENT SECTOR. The Fund invests, under normal conditions, at least 80%
of its net assets in fixed-income securities issued by or on behalf of states,
territories and possessions of the United States (including the District of
Columbia) and the political subdivisions, agencies and instrumentalities
thereof ("Municipal Securities"), the interest on which is exempt from regular
federal income tax (i.e., excluded from gross income for federal income tax
purposes), and is not a tax preference item under the federal alternative
minimum tax. Under normal circumstances, the Fund's investments in private
activity bonds and taxable investments will not exceed, in the aggregate, 20%
of the Fund's net assets. The interest from certain private activity bonds
(including the Fund's distributions of such interest) may be a preference item
for purposes of the federal alternative minimum tax. 100% of the Fund's
portfolio will be invested in U.S. dollar-denominated securities.
 
  CREDIT QUALITY. The Municipal Securities in which the Fund invests will be
rated, at the time of investment, at least BBB or Baa by an NRSRO or, if
unrated, will be determined by the Investment Adviser to be of comparable
quality. Municipal Securities rated BBB or Baa are considered medium-grade
obligations with speculative characteristics, and adverse economic conditions
or changing circumstances may weaken their issuers' capability to pay interest
and repay principal. The credit rating assigned to Municipal Securities may
reflect the existence of guarantees, letters of credit or other credit
enhancement features available to the issuers or holders of such Municipal
Securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), interest rate
swaps, floors, caps and collars. The Fund may also employ other investment
techniques to seek to enhance returns, such as lending portfolio securities
and entering into repurchase agreements and other investment practices
described under "Investment Techniques."
 
  While the Fund, under normal market conditions, invests substantially all of
its assets in Municipal Securities, the recognition of certain accrued market
discount income (if the Fund acquires Municipal Securities or other
obligations at a market discount), income from investments other than
Municipal Securities and any capital gains generated from the disposition of
investments, will result in taxable income. In addition to federal income tax,
shareholders may be subject to state, local or foreign taxes on distributions
of such income received from the Fund. See "Description of Securities."
 
 GOVERNMENT INCOME FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income, consistent with safety of principal.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
Mutual Fund Government/Mortgage Index, plus or minus one year. In addition,
under normal interest rate conditions, the Fund's maximum duration will not
exceed six years. The approximate interest rate sensitivity of the Fund is
expected to be comparable to a five-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in U.S. Government Securities and in repurchase
agreements collateralized by such securities. The remainder of the Fund's
assets may be invested in non-government securities such as privately issued
Mortgage-Backed Securities, Asset-Backed Securities and corporate securities.
100% of the Fund's portfolio will be invested in U.S. dollar-denominated
securities.
 
                                      17
<PAGE>
 
  CREDIT QUALITY. The Fund's non-U.S. Government Securities will be rated, at
the time of investment, AAA or Aaa by an NRSRO or, if unrated, will be
determined by the Investment Adviser to be of comparable quality.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), mortgage, credit
and interest rate swaps and interest rate floors, caps and collars. The Fund
may also employ other investment techniques to seek to enhance returns, such
as lending portfolio securities and entering into mortgage dollar rolls,
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 MUNICIPAL INCOME FUND
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income that is exempt from regular federal income tax,
consistent with preservation of capital.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
fifteen-year Municipal Bond Index, plus or minus one year. In addition, under
normal interest rate conditions, the Fund's maximum duration will not exceed
twelve years. The approximate interest rate sensitivity of the Fund is
expected to be comparable to a fifteen-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
80% of its net assets in Municipal Securities, the interest on which is exempt
from regular federal income tax (i.e., excluded from gross income for federal
income tax purposes). The Fund may invest up to 100% of its net assets in
private activity bonds, the interest from certain of which (including the
Fund's distributions of such interest) may be a preference item for purposes
of the federal alternative minimum tax. 100% of the Fund's portfolio will be
invested in U.S. dollar-denominated securities.
 
  CREDIT QUALITY. Under normal market conditions, the weighted average credit
quality of the Fund's portfolio will be equivalent to that of securities rated
AA or Aa by an NRSRO. All securities purchased by the Fund will be rated, at
the time of investment, at least BBB or Baa by an NRSRO or, if unrated, will
be determined by the Investment Adviser to be of comparable quality. Fixed-
income securities rated BBB or Baa are considered medium-grade obligations
with speculative characteristics, and adverse economic conditions or changing
circumstances may weaken their issuers' capability to pay interest and repay
principal. The credit rating assigned to Municipal Securities may reflect the
existence of guarantees, letters of credit or other credit enhancement
features available to the issuers or holders of such Municipal Securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), interest rate
swaps, interest rate floors, caps and collars. The Fund may also employ other
investment techniques to seek to enhance returns, such as lending portfolio
securities and entering into repurchase agreements and other investment
practices described under "Investment Techniques."
 
  While the Fund, under normal market conditions, invests substantially all of
its assets in Municipal Securities, the recognition of certain accrued market
discount income (if the Fund acquires Municipal Securities or other
obligations at a market discount), income from investments other than
Municipal Securities and any capital gains generated from the disposition of
investments, will result in taxable income. In addition to federal income tax,
shareholders may be subject to state, local or foreign taxes on distributions
of such income received from the Fund. See "Description of Securities."
 
                                      18
<PAGE>
 
 CORE FIXED INCOME FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
total return consisting of capital appreciation and income that exceeds the
total return of the Lehman Brothers Aggregate Bond Index (the "Index").
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
Aggregate Bond Index, plus or minus one year. In addition, under normal
interest rate conditions, the Fund's maximum duration will not exceed six
years. The approximate interest rate sensitivity of the Fund is expected to be
comparable to a five-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in fixed-income securities, including U.S. Government
Securities, corporate debt securities, Mortgage-Backed Securities, and Asset-
Backed Securities. The Fund may invest up to 25% of its total assets in
obligations of domestic and foreign issuers which are denominated in
currencies other than the U.S. dollar, 10% of which may be invested in issuers
in countries with emerging markets and economies. A number of investment
strategies will be used to achieve the Fund's investment objective, including
market sector selection, determination of yield curve exposure, and issuer
selection. In addition, the Investment Adviser will attempt to take advantage
of pricing inefficiencies in the fixed-income markets.
 
  The Index currently includes U.S. Government Securities and fixed-rate,
publicly issued, U.S. dollar-denominated fixed-income securities rated at
least BBB or Baa by an NRSRO. The securities currently included in the Index
have at least one year remaining to maturity; have an outstanding principal
amount of at least $100 million; and are issued by the following types of
issuers, with each category receiving a different weighting in the Index: U.S.
Treasury; agencies, authorities or instrumentalities of the U.S. government;
issuers of Mortgage-Backed Securities; utilities; industrial issuers;
financial institutions; foreign issuers; and issuers of Asset-Backed
Securities. The Index is a trademark of Lehman Brothers. Inclusion of a
security in the Index does not imply an opinion by Lehman Brothers as to its
attractiveness or appropriateness for investment. Although Lehman Brothers
obtains factual information used in connection with the Index from sources
which it considers reliable, Lehman Brothers claims no responsibility for the
accuracy, completeness or timeliness of such information and has no liability
to any person for any loss arising from results obtained from the use of the
Index data.
 
  CREDIT QUALITY. All U.S. dollar-denominated fixed-income securities
purchased by the Fund will be rated, at the time of investment, at least BBB
or Baa by an NRSRO. The non-U.S. dollar-denominated fixed-income securities in
which the Fund may invest will be rated, at the time of investment, at least
AA or Aa by an NRSRO or, if unrated, will be determined by the Investment
Adviser to be of comparable quality. Fixed-income securities rated BBB or Baa
are considered medium-grade obligations with speculative characteristics, and
adverse economic conditions or changing circumstances may weaken their
issuers' capability to pay interest and repay principal.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure, to seek to hedge its exposure to foreign
currencies and to seek to enhance returns. These techniques include, but are
not limited to, the use of financial futures contracts, option contracts
(including options on futures), forward foreign currency exchange contracts,
currency options and futures, currency, mortgage, credit and interest rate
swaps and interest rate floors, caps and collars. Currency management
techniques involve risks different from those associated with investing solely
in U.S. dollar-denominated fixed-income securities of U.S. issuers. It is
expected that the Fund will use certain currency techniques to seek to hedge
against currency
 
                                      19
<PAGE>
 
exchange rate fluctuations or to seek to increase total return. The Fund may
invest in custodial receipts, Municipal Securities and convertible securities.
The Fund may also employ other investment techniques to seek to enhance
returns, such as lending portfolio securities and entering into mortgage
dollar rolls, repurchase agreements and other investment practices, described
under "Investment Techniques."
 
 GLOBAL INCOME FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high total return, emphasizing current income, and, to a lesser extent,
providing opportunities for capital appreciation.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the J.P. Morgan Global
Government Bond Index (hedged), plus or minus 2.5 years. In addition, under
normal interest rate conditions, the Fund's maximum duration will not exceed
7.5 years. The approximate interest rate sensitivity of the Fund is expected
to be comparable to a six-year bond.
 
  INVESTMENT SECTOR. The Fund invests primarily in a portfolio of high quality
fixed-income securities of U.S. and foreign issuers and enters into
transactions in foreign currencies. Under normal market conditions, the Fund
will (i) have at least 30% of its total assets, after considering the effect
of currency positions, denominated in U.S. dollars and (ii) invest in
securities of issuers in at least three countries. The Fund may also invest up
to 10% of its total assets in issuers in countries with emerging markets and
economies. The Fund seeks to meet its investment objective by pursuing
investment opportunities in foreign and domestic fixed-income securities
markets and by engaging in currency transactions to seek to enhance returns
and to seek to hedge its portfolio against currency exchange rate
fluctuations.
 
  The fixed-income securities in which the Fund may invest include: (i) U.S.
Government Securities and custodial receipts therefor; (ii) securities issued
or guaranteed by a foreign government or any of its political subdivisions,
authorities, agencies, instrumentalities or by supranational entities (i.e.,
international organizations designated or supported by governmental entities
to promote economic reconstruction or development, such as the World Bank);
(iii) corporate debt securities; (iv) certificates of deposit and bankers'
acceptances issued or guaranteed by, or time deposits maintained at, U.S. or
foreign banks (and their branches wherever located) having total assets of
more than $1 billion; (v) commercial paper; and (vi) Mortgage-Backed and
Asset-Backed Securities.
 
  CREDIT QUALITY. All securities purchased by the Fund will be rated, at the
time of investment, at least BBB or Baa by an NRSRO. However, the Fund will
invest at least 50% of its total assets in securities rated, at the time of
investment, AAA or Aaa by an NRSRO. Unrated securities will be determined by
the Investment Adviser to be of comparable quality. Fixed-income securities
rated BBB or Baa are considered medium-grade obligations with speculative
characteristics, and adverse economic conditions or changing circumstances may
weaken their issuers' capability to pay interest and repay principal.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure, to seek to hedge its exposure to foreign
currencies and to seek to enhance returns. These techniques include, but are
not limited to, the use of financial futures contracts, option contracts
(including options on futures), forward foreign currency exchange contracts,
currency options and futures, currency, mortgage, credit and interest rate
swaps and interest rate floors, caps and collars. Currency management
techniques involve risks different from those associated with investing solely
in U.S. dollar-denominated fixed-income securities of U.S.
 
                                      20
<PAGE>
 
issuers. It is expected that the Fund will use certain currency techniques to
seek to hedge against currency exchange rate fluctuations or to seek to
increase total return. While the Fund will have both long and short currency
positions, its net long and short foreign currency exposure will not exceed
the value of the Fund's total assets. To the extent that the Fund is fully
invested in foreign securities while also maintaining currency positions, it
may be exposed to greater combined risk. The Fund's net currency positions may
expose it to risks independent of its securities positions. The Fund may also
employ other investment techniques to seek to enhance returns, such as lending
portfolio securities and entering into mortgage dollar rolls, repurchase
agreements and other investment practices described under "Investment
Techniques."
 
  The Fund may invest more than 25% of its total assets in the securities of
corporate and governmental issuers located in each of Canada, Germany, Japan,
and the United Kingdom as well as in the securities of U.S. issuers.
Concentration of the Fund's investments in such issuers will subject the Fund,
to a greater extent than if investment was more limited, to the risks of
adverse securities markets, exchange rates and social, political or economic
events which may occur in those countries. Not more than 25% of the Fund's
total assets will be invested in securities of issuers in any other single
foreign country.
 
 HIGH YIELD FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income and may also consider the potential for capital
appreciation.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers High
Yield Bond Index, plus or minus 2.5 years. In addition, under normal interest
rate conditions, the Fund's maximum duration will not exceed 7.5 years. The
approximate interest rate sensitivity of the Fund is expected to be comparable
to a 6-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in high yield, fixed-income securities rated, at the
time of investment, below investment grade. Non-investment grade securities
are securities rated BB, Ba or below by an NRSRO, or, if unrated, determined
by the Investment Adviser to be of comparable quality. The Fund may invest in
all types of fixed-income securities, including senior and subordinated
corporate debt obligations (such as bonds, debentures, notes and commercial
paper), convertible and non-convertible corporate debt obligations, loan
participations, custodial receipts, municipal securities and preferred stock.
The Fund may invest up to 25% of its total assets in obligations of domestic
and foreign issuers (including securities of issuers located in countries with
emerging markets and economies) which are denominated in currencies other than
the U.S. dollar. Under normal market conditions, the Fund may invest up to 35%
of its total assets in investment grade fixed-income securities, including
U.S. Government Securities, Asset-Backed and Mortgage-Backed Securities and
corporate securities. The Fund may also invest in common stocks, warrants,
rights and other equity securities, but will generally hold such equity
investments only when debt or preferred stock of the issuer of such equity
securities is held by the Fund. A number of investment strategies are used to
seek to achieve the Fund's investment objective, including market sector
selection, determination of yield curve exposure, and issuer selection. In
addition, the Investment Adviser will attempt to take advantage of pricing
inefficiencies in the fixed-income markets.
 
  CREDIT QUALITY. The Fund invests primarily in high yield, fixed income
securities rated below investment grade, including securities of issuers in
default. Non-investment grade securities (commonly known as "junk bonds") tend
to offer higher yields than higher rated securities with similar maturities.
Non-investment grade
 
                                      21
<PAGE>
 
securities are, however, considered speculative and generally involve greater
price volatility and greater risk of loss of principal and interest than
higher rated securities. See "Description of Securities." A description of the
corporate bond and preferred stock ratings is contained in Appendix B to the
Additional Statement.
 
  For your information, set forth below is the average distribution of ratings
for the portfolio securities (including commercial paper and nonconvertible
bonds) held by Fund during the most recent fiscal year:
 
                                CREDIT QUALITY
 
<TABLE>
<CAPTION>
                                                                   PERCENTAGE OF
                                                                   FUND'S ASSETS
                                                                   -------------
     <S>                                                           <C>
     AAA/Aaa......................................................       1.3%
     AA/Aa........................................................         0%
     A............................................................         0%
     BBB/Baa......................................................       0.3%
     BB/Ba........................................................      13.1%
     Below Ba.....................................................      85.3%
     Not rated....................................................         0%
      Comparable to A.............................................         0%
      Comparable to BBB/Baa.......................................         0%
      Comparable to BB/Ba or lower................................         0%
      Comparable to Below Ba......................................         0%
                                                                       -----
                                                                       100.0%
                                                                       =====
</TABLE>
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure, to seek to hedge its exposure to foreign
securities and to seek to enhance returns. These techniques include, but are
not limited to, the use of financial futures contracts, option contracts
(including options on futures), forward foreign currency exchange contracts,
currency options and futures, currency, mortgage, credit and interest rate
swaps, and interest rate floors, caps and collars. Currency management
techniques involve risks different from those associated with investing solely
in U.S. dollar-denominated fixed-income securities of U.S. issuers. It is
expected that the Fund will use certain currency techniques to seek to hedge
against currency exchange rate fluctuations or to seek to increase total
return. The Fund may also employ other investment techniques to seek to
enhance returns, such as lending portfolio securities and entering into
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 
                           DESCRIPTION OF SECURITIES
 
 
U.S. GOVERNMENT SECURITIES
 
  Each Fund may invest in U.S. Government Securities. Generally, these
securities include U.S. Treasury obligations and obligations issued or
guaranteed by U.S. government agencies, instrumentalities or sponsored
enterprises which are supported by (a) the full faith and credit of the U.S.
Treasury (such as the Government National Mortgage Association ("Ginnie
Mae")), (b) the right of the issuer to borrow from the U.S. Treasury (such as
securities of the Student Loan Marketing Association), (c) the discretionary
authority of the U.S. government to purchase certain obligations of the issuer
(such as the Federal National Mortgage Association ("Fannie Mae") and Federal
Home Loan Mortgage Corporation ("Freddie Mac")), or (d) only the credit of the
issuer. No assurance can be given that the U.S. government will provide
financial support to U.S. government agencies, instrumentalities or sponsored
enterprises in the future.
 
                                      22
<PAGE>
 
  U.S. Government Securities also include Treasury receipts, zero coupon bonds
and other stripped U.S. Government Securities, where the interest and
principal components of stripped U.S. Government Securities are traded
independently. The most widely recognized program is the Separate Trading of
Registered Interest and Principal of Securities Program.
 
MORTGAGE-BACKED SECURITIES
 
  CHARACTERISTICS OF MORTGAGE-BACKED SECURITIES. Mortgage-Backed Securities
represent direct or indirect participations in, or are collateralized by and
payable from, mortgage loans secured by real property. Mortgagors can
generally prepay interest or principal on their mortgage whenever they choose.
Therefore, Mortgage-Backed Securities are often subject to more rapid
repayment than their stated maturity date would indicate as a result of
principal prepayments on the underlying loans. This can result in
significantly greater price and yield volatility than is the case with
traditional fixed-income securities. During periods of declining interest
rates, prepayments can be expected to accelerate, and thus impair a Fund's
ability to reinvest the returns of principal at comparable yields. Conversely,
in a rising interest rate environment, a declining prepayment rate will extend
the average life of many Mortgage-Backed Securities and prevent a Fund from
taking advantage of such higher yields.
 
  FIXED RATE MORTGAGE LOANS. Generally, fixed-rate mortgage loans pay interest
at fixed annual rates and have original terms to maturity ranging from 5 to 40
years. Fixed-rate mortgage loans typically provide for monthly payments of
principal and interest in substantially equal installments for the term of the
mortgage note in sufficient amounts to amortize fully principal by maturity,
although certain fixed-rate mortgage loans provide for a large final "balloon"
payment upon maturity.
 
  ADJUSTABLE RATE MORTGAGE LOANS ("ARMS"). The Adjustable Rate Government Fund
will primarily, and the Short Duration Government, Government Income, Core
Fixed Income, Global Income and High Yield Funds may, invest in ARMs, which
are pass-through mortgage securities collateralized by mortgages with
adjustable rather than fixed coupon rates. ARMs generally provide for a fixed
initial mortgage interest rate for a set period. Thereafter, the interest
rates are subject to periodic adjustments based on changes to a designated
benchmark index.
 
  ARMs allow a Fund to participate in increases in interest rates through
periodic increases in the securities' coupon rates. During periods of
declining interest rates, coupon rates may readjust downward resulting in
lower yields to a Fund. Therefore, the value of an ARM is unlikely to rise
during periods of declining interest rates to the same extent as fixed-rate
securities. Interest rate declines may result in accelerated prepayment of
mortgages with the result that proceeds from prepayments will be reinvested at
lower interest rates. During periods of rising interest rates, changes in the
coupon rate will lag behind changes in the market rate. ARMs are also
typically subject to maximum increases and decreases in the interest rate
adjustment which can be made on any one adjustment date, in any one year, or
during the life of the security. In the event of dramatic increases or
decreases in prevailing market interest rates, the value of a Fund's
investments in ARMs may fluctuate more substantially since these limits may
prevent the security from fully adjusting its interest rate to the prevailing
market rates.
 
  U.S. GOVERNMENT GUARANTEED MORTGAGE-BACKED SECURITIES. Certain Mortgage-
Backed Securities are issued or guaranteed by the U.S. government, its
agencies, instrumentalities or sponsored enterprises. Such issuers include,
but are not limited to, Ginnie Mae, Fannie Mae and Freddie Mac. See "U.S.
Government Securities."
 
                                      23
<PAGE>
 
  PRIVATELY ISSUED MORTGAGE-BACKED SECURITIES. The Government Income, Core
Fixed Income, Global Income and High Yield Funds may invest in Mortgage-Backed
Securities issued or sponsored by non-governmental entities. Privately issued
Mortgage-Backed Securities are generally backed by pools of conventional
(i.e., non-government guaranteed or insured) mortgage loans. Since such
Mortgage-Backed Securities normally are not guaranteed by an entity having the
credit standing of Ginnie Mae, Fannie Mae or Freddie Mac, in order to receive
a high quality rating from the rating organizations (i.e., S&P or Moody's),
they normally are structured with one or more types of "credit enhancement."
 
  MULTIPLE CLASS MORTGAGE-BACKED SECURITIES AND COLLATERALIZED MORTGAGE
OBLIGATIONS. The Adjustable Rate Government, Short Duration Government,
Government Income, Core Fixed Income, Global Income and High Yield Funds may
also invest in multiple class securities, including collateralized mortgage
obligations ("CMOs") and Real Estate Mortgage Investment Conduit ("REMIC")
pass-through or participation certificates. CMOs provide an investor with a
specified interest in the cash flow from a pool of underlying mortgages or of
other Mortgage-Backed Securities. CMOs are issued in multiple classes, each
with a specified fixed or floating interest rate and a final scheduled
distribution date. In most cases, payments of principal are applied to the CMO
classes in the order of their respective stated maturities, so that no
principal payments will be made on a CMO class until all other classes having
an earlier stated maturity date are paid in full. A REMIC is a CMO that
qualifies for special tax treatment under the Internal Revenue Code of 1986,
as amended (the "Code"), and invests in certain mortgages principally secured
by interests in real property and other permitted investments. The Funds do
not intend to purchase residual interests in REMICs.
 
  STRIPPED MORTGAGE-BACKED SECURITIES. The Adjustable Rate Government, Short
Duration Government, Government Income, Core Fixed Income, Global Income and
High Yield Funds may invest in Stripped Mortgage-Backed Securities ("SMBS"),
which are derivative multiple class Mortgage-Backed Securities. SMBS are
usually structured with two different classes: one that receives 100% of the
interest payments and the other that receives 100% of the principal payments
from a pool of mortgage loans. If the underlying mortgage loans experience
different than anticipated prepayments of principal, a Fund may fail to recoup
fully its initial investment in these securities. The market value of the
class consisting entirely of principal payments generally is unusually
volatile in response to changes in interest rates. The yields on a class of
SMBS that receives all or most of the interest from mortgage loans are
generally higher than prevailing market yields on other Mortgage-Backed
Securities because their cash flow patterns are more volatile and there is a
greater risk that the initial investment will not be fully recouped. A Fund's
investments in SMBS may require the Fund to sell certain of its portfolio
securities to generate sufficient cash to satisfy certain income distribution
requirements.
 
ASSET-BACKED SECURITIES
 
  The Government Income, Core Fixed Income, Global Income and High Yield Funds
may invest in Asset-Backed Securities. The principal and interest payments on
Asset-Backed Securities are collateralized by pools of assets such as auto
loans, credit card receivables, leases, installment contracts and personal
property. Such asset pools are securitized through the use of special purpose
trusts or corporations. Principal and interest payments may be credit enhanced
by a letter of credit, a pool insurance policy or a senior/subordinated
structure.
 
LOAN PARTICIPATIONS
 
  The High Yield Fund may invest in loan participations. Such loans must be to
issuers in whose obligations the High Yield Fund may invest. A loan
participation is an interest in a loan to a U.S. or foreign company or other
borrower which is administered and sold by a financial intermediary. In a
typical corporate loan
 
                                      24
<PAGE>
 
syndication, a number of lenders, usually banks (co-lenders), lend a corporate
borrower a specified sum pursuant to the terms and conditions of a loan
agreement. One of the co-lenders usually agrees to act as the agent bank with
respect to the loan.
 
  Participation interests acquired by the High Yield Fund may take the form of
a direct or co-lending relationship with the corporate borrower, an assignment
of an interest in the loan by a co-lender or another participant, or a
participation in the seller's share of the loan. When the High Yield Fund acts
as co-lender in connection with a participation interest or when the High
Yield Fund acquires certain participation interests, the High Yield Fund will
have direct recourse against the borrower if the borrower fails to pay
scheduled principal and interest. In cases where the High Yield Fund lacks
direct recourse, it will look to the agent bank to enforce appropriate credit
remedies against the borrower. In these cases, the High Yield Fund may be
subject to delays, expenses and risks that are greater than those that would
have been involved if the Fund had purchased a direct obligation (such as
commercial paper) of such borrower. For example, in the event of the
bankruptcy or insolvency of the corporate borrower, a loan participation may
be subject to certain defenses by the borrower as a result of improper conduct
by the agent bank. Moreover, under the terms of the loan participation, the
High Yield Fund may be regarded as a creditor of the agent bank (rather than
of the underlying corporate borrower), so that the High Yield Fund may also be
subject to the risk that the agent bank may become insolvent. The secondary
market, if any, for these loan participations is limited and any loan
participations purchased by the High Yield Fund will be regarded as illiquid.
 
  For purposes of certain investment limitations pertaining to diversification
of the High Yield Fund's portfolio investments, the issuer of a loan
participation will be the underlying borrower. However, in cases where the
High Yield Fund does not have recourse directly against the borrower, both the
borrower and each agent bank and co-lender interposed between the High Yield
Fund and the borrower will be deemed issuers of a loan participation.
 
MUNICIPAL SECURITIES
 
  GENERAL. Municipal Securities in which the Short Duration Tax-Free and
Municipal Income Funds and, to a limited extent, the Core Fixed Income and
High Yield Funds invest consist of bonds, notes, commercial paper and other
instruments (including participation interests in such securities) issued by
or on behalf of states, territories and possessions of the United States
(including the District of Columbia) and their political subdivisions,
agencies or instrumentalities, the interest on which, in the opinion of bond
counsel for the issuers or counsel selected by the Investment Adviser, is
exempt from regular federal income tax (i.e., excluded from gross income for
federal income tax purposes but not necessarily exempt from federal
alternative minimum tax or from state or local taxes). Such securities may pay
fixed, variable or floating rates of interest. Municipal Securities are often
issued to obtain funds for various public purposes, including the construction
of a wide range of public facilities such as bridges, highways, housing,
hospitals, mass transportation, schools, streets and water and sewer works.
Other public purposes for which Municipal Securities may be issued include
refunding outstanding obligations, obtaining funds for general operating
expenses, and obtaining funds to lend to other public institutions and
facilities. The Core Fixed Income and High Yield Funds may also invest in
taxable Municipal Securities.
 
  PRIVATE ACTIVITY BONDS. Municipal Securities include "private activity
bonds" or industrial development bonds, which are issued by or on behalf of
public authorities to obtain funds for such projects as privately-operated
housing facilities, airport, mass transit or port facilities and sewage
disposal. In addition, proceeds of certain industrial development bonds are
used for constructing, equipping, repairing or improving privately operated
industrial or commercial facilities. The Short Duration Tax-Free and Municipal
Income Funds'
 
                                      25
<PAGE>
 
distributions attributable to the interest income from private activity bonds
may subject certain investors to the federal alternative minimum tax.
 
  MUNICIPAL LEASES AND CERTIFICATES OF PARTICIPATION. A municipal lease is an
obligation in the form of a lease or installment purchase which is issued by a
state or local government to acquire equipment and facilities. Certificates of
participation represent undivided interests in municipal leases, installment
purchase agreements or other instruments. The primary risk associated with
municipal lease obligations and certificates of participation is that the
governmental lessee will fail to appropriate funds to enable it to meet its
payment obligations under the lease. Although the obligations may be secured
by the leased equipment or facilities, the disposition of the property in the
event of non-appropriation or foreclosure might prove difficult, time
consuming and costly, and result in a delay in recovering or the failure to
fully recover the Fund's original investment. To the extent that a Fund
invests in unrated municipal leases or participates in such leases, the credit
quality rating and risk of cancellation of such unrated leases will be
monitored on an ongoing basis. Certain municipal lease obligations and
certificates of participation may be deemed illiquid for the purpose of a
Fund's limitation on investments in illiquid securities.
 
  PRE-REFUNDED MUNICIPAL SECURITIES. The interest and principal payments on
pre-refunded Municipal Securities are typically paid from the cash flow
generated from an escrow fund consisting of U.S. Government Securities. These
payments have been "pre-refunded" using the escrow fund.
 
  INSURED SECURITIES. "Insured" Municipal Securities are those for which
scheduled payments of interest and principal are guaranteed by a private (non-
governmental) insurance company. The insurance entitles a Fund to receive only
the face or par value of the securities held by the Fund. The insurance does
not guarantee the market value of the Municipal Securities or the net asset
value of a Fund's shares.
 
  AUCTION RATE SECURITIES. Auction rate Municipal Securities permit the holder
to sell the securities in an auction at par value at specified intervals. The
dividend or interest is typically reset by "Dutch" auction in which bids are
made by broker-dealers and other institutions for a certain amount of
securities at a specified minimum yield. The rate set by the auction is the
lowest interest or dividend rate that covers all securities offered for sale.
While this process is designed to permit auction rate securities to be traded
at par value, there is the risk that an auction will fail due to insufficient
demand for the securities. A Fund will take the time remaining until the next
scheduled auction date into account for purposes of determining the
securities' duration.
 
CORPORATE DEBT OBLIGATIONS
 
  The Government Income, Core Fixed Income, Global Income and High Yield Funds
may invest in corporate debt obligations. In addition to obligations of
corporations, corporate debt obligations include securities issued by banks
and other financial institutions. Corporate debt obligations are subject to
the risk of an issuer's inability to meet principal and interest payments on
the obligations.
 
  The Government Income, Core Fixed Income, Global Income and High Yield Funds
may also invest in trust preferred securities. A trust preferred or capital
security is a long dated bond (for example, 30 years) with preferred features.
The preferred features are that payment of interest can be deferred for a
specified period without initiating a default event. From a bondholder's
viewpoint, the securities are senior in claim to standard preferred stock but
junior to other bondholders. From the issuer's viewpoint, the securities are
attractive because their interest is deductible for tax purposes like other
types of debt instruments.
 
 
                                      26
<PAGE>
 
CONVERTIBLE SECURITIES
 
  The Core Fixed Income and High Yield Funds may invest in convertible
securities, including debt obligations, and for High Yield Fund preferred
stock, of an issuer convertible at a stated exchange rate into common stock of
the issuer. Convertible securities generally offer lower interest or dividend
yields than non-convertible securities of similar quality. As with all debt
securities, the market value of convertible securities tends to decline as
interest rates increase and, conversely, to increase as interest rates
decline. However, when the market price of the common stock underlying a
convertible security exceeds the conversion price, the price of the
convertible security tends to reflect the market price of the underlying
common stock. As the market price of the underlying common stock declines, the
convertible security tends to trade increasingly on a yield basis, and thus
may not depreciate to the same extent as the underlying common stock.
Convertible securities in which a Fund invests are subject to the same rating
criteria as its other investments in fixed-income securities.
 
PREFERRED STOCK, WARRANTS AND RIGHTS
 
  The High Yield Fund may invest in preferred stock, warrants and rights.
Preferred stocks are securities that represent an ownership interest providing
the holder with claims on the issuer's earnings and assets before common stock
owners but after bond owners. Unlike debt securities, the obligations of an
issuer of preferred stock, including dividend and other payment obligations,
may not typically be accelerated by the holders of such preferred stock on the
occurrence of an event of default (such as a covenant default or filing of a
bankruptcy petition) or other non-compliance by the issuer with the terms of
the preferred stock. Often, however, on the occurrence of any such event of
default or non-compliance by the issuer, preferred stockholders will be
entitled to gain representation on the issuer's board of directors or increase
their existing board representation. In addition, preferred stockholders may
be granted voting rights with respect to certain issues on the occurrence of
any event of default.
 
  Warrants and other rights are options to buy a stated number of shares of
common stock at a specified price at any time during the life of the warrant.
The holders of warrants and rights have no voting rights, receive no dividends
and have no rights with respect to the assets of the issuer.
 
FOREIGN INVESTMENTS
 
  FOREIGN SECURITIES. The Global Income Fund will, and the Core Fixed Income
and High Yield Funds may, invest in fixed-income securities of foreign issuers
denominated in any currency. However, the Core Fixed Income and High Yield
Funds will limit their investments in non-U.S. dollar-denominated fixed-income
securities to 25% of their total assets. Investment in foreign securities may
offer potential benefits that are not available from investing exclusively in
U.S. dollar-denominated domestic issues. Foreign countries may have economic
policies or business cycles different from those of the U.S. and markets for
foreign fixed-income securities do not necessarily move in a manner parallel
to U.S. markets.
 
  Investing in the securities of foreign issuers involves risks that are not
typically associated with investing in fixed-income securities of domestic
issuers quoted in U.S. dollars. Such investments may be affected by changes in
currency rates, changes in foreign or U.S. laws or restrictions applicable to
such investments and in exchange control regulations (e.g., currency
blockage). A decline in the exchange rate of the currency (i.e., weakening of
the currency against the U.S. dollar) in which a portfolio security is quoted
or denominated relative to the U.S. dollar would reduce the value of the
portfolio security. In addition, if the currency in which a Fund receives
dividends, interest or other payments declines in value against the U.S.
dollar before such income is distributed as dividends to shareholders or
converted to U.S. dollars, the Fund may have to sell portfolio securities to
obtain
 
                                      27
<PAGE>
 
sufficient cash to pay such dividends. The expected introduction of a single
currency, the euro, on January 1, 1999, for participating European nations in
the Economic and Monetary Union ("EU") presents unique uncertainties,
including whether the payment and operational systems of banks and other
financial institutions will be ready by the scheduled launch date; the
creation of suitable clearing and settlement payment systems for the new
currency; the legal treatment of certain outstanding financial contracts after
January 1, 1999, that refer to existing currencies rather than the euro; the
establishment and maintenance of exchange rates for currencies being converted
into the euro and the euro; the fluctuation of the euro relative to non-euro
currencies during the transition period from January 1, 1999 to December 31,
2000 and beyond; whether the interest rate, tax and labor regimes of European
countries participating in the euro will converge over time; and whether the
conversion of the currencies of other EU countries such as the United Kingdom,
Denmark and Greece into the euro and the admission of other non-EU countries
such as Poland, Latvia and Lithuania as members of the EU may have an impact
on the euro. These or other factors, including political and economic risks,
could cause market disruptions before or after the introduction of the euro,
and could adversely affect the value of securities and foreign currencies held
by the Funds. In addition, clearance and settlement procedures may be
different in foreign countries and, in certain markets, such procedures have
been unable to keep pace with the volume of securities transactions, making it
more difficult to conduct such transactions.
 
  The Core Fixed Income, Global Income and High Yield Funds may invest in an
issuer domiciled in one country yet issuing the security in the currency of
another country. The Funds may also invest in debt securities denominated in
the European Currency Unit ("ECU"), which is a "basket" consisting of
specified amounts in the currencies of certain of the twelve member states of
the European Community. The specific amounts of currencies comprising the ECU
may be adjusted by the Council of Ministers of the European Community from
time to time to reflect changes in relative values of the underlying
currencies. In addition, the Funds may invest in securities denominated in
other currency "baskets."
 
  Foreign issuers are not generally subject to uniform accounting, auditing
and financial reporting standards comparable to those applicable to U.S.
issuers. There may be less publicly available information about a foreign
issuer than about a U.S. issuer. In addition, there is generally less
government regulation of foreign markets, companies and securities dealers
than in the U.S. Foreign securities markets may have substantially less volume
than U.S. securities markets and securities of many foreign issuers may be
less liquid and more volatile than securities of comparable domestic issuers.
Furthermore, with respect to certain foreign countries, there is a possibility
of nationalization, expropriation or confiscatory taxation, imposition of
withholding or other taxes on dividend or interest payments (or, in some
cases, capital gains), limitations on the removal of funds or other assets of
a Fund, political or social instability or diplomatic developments which could
affect investments in those countries.
 
  FOREIGN GOVERNMENT SECURITIES. The Core Fixed Income, Global Income and High
Yield Funds may invest in debt obligations of foreign governments and
governmental agencies, including those of emerging countries. Investment in
sovereign debt obligations involves special risks not present in debt
obligations of corporate issuers. The issuer of the debt or the governmental
authorities that control the repayment of the debt may be unable or unwilling
to repay principal or interest when due in accordance with the terms of such
debt, and a Fund may have limited recourse in the event of a default. Periods
of economic uncertainty may result in volatility of market prices of sovereign
debt, and in turn a Fund's net asset value, to a greater extent than the
volatility inherent in debt obligations of U.S. issuers. A sovereign debtor's
willingness or ability to repay principal and pay interest in a timely manner
may be affected by, among other factors, its cash flow situation, the extent
of its foreign currency reserves, the availability of sufficient foreign
exchange on the date a payment
 
                                      28
<PAGE>
 
is due, the relative size of the debt service burden to the economy as a
whole, the sovereign debtor's policy toward international lenders and the
political constraints to which a sovereign debtor may be subject.
 
  EMERGING MARKETS. The Core Fixed Income and Global Income Funds may invest
up to 10% and the High Yield Fund may invest up to 25% of their total assets
in securities of issuers located in countries with emerging economies or
securities markets ("emerging markets"). Political and economic structures in
many emerging markets may be undergoing significant evolution and rapid
development, and emerging markets may lack the social, political and economic
stability characteristic of more developed countries. As a result, the risks
relating to investments in foreign securities described above, including the
possibility of nationalization, expropriation and confiscatory taxation, may
be heightened. In addition, unanticipated political and social developments
may affect the value of a Fund's investments in emerging markets and the
availability to the Fund of additional investments in such countries. The
small size and inexperience of the securities markets in certain emerging
markets and the limited volume of trading in securities in those countries may
make a Fund's investments in such countries less liquid and more volatile than
investments in countries with more developed securities markets (such as the
U.S., Japan and most Western European countries). See the Additional Statement
for further information regarding a Fund's investments in emerging markets.
 
  FOREIGN CURRENCY TRANSACTIONS. Because investment in foreign issuers by the
Core Fixed Income, Global Income and High Yield Funds will usually involve
currencies of foreign countries, and because the Funds may have currency
exposure independent of their securities positions, the value of the assets of
a Fund as measured in U.S. dollars will be affected by changes in foreign
currency exchange rates. A Fund may, to the extent it invests in foreign
securities, purchase or sell foreign currencies on a spot basis and may also
purchase or sell forward foreign currency exchange contracts for hedging
purposes and to seek to protect against anticipated changes in future foreign
currency exchange rates. In addition, a Fund also may enter into such
contracts to seek to increase total return when the Investment Adviser
anticipates that the foreign currency will appreciate or depreciate in value,
but securities denominated or quoted in that currency do not present
attractive investment opportunities and are not held in the Fund's portfolio.
When entered into to seek to increase total return, forward foreign currency
exchange contracts are considered speculative. The Funds may also engage in
cross-hedging by using forward contracts in a currency different from that in
which the hedged security is denominated or quoted if the Investment Adviser
determines that there is a pattern of correlation between the two currencies.
If a Fund enters into a forward foreign currency exchange contract to buy
foreign currency for any purpose or to sell foreign currency to seek to
increase total return, the Fund will be required to place cash or liquid
assets in a segregated account with the Fund's custodian in an amount equal to
the value of the Fund's total assets committed to the consummation of the
forward contract, or to otherwise cover its position in a manner permitted by
the SEC. A Fund will incur costs in connection with conversions between
various currencies. A Fund may hold foreign currency received in connection
with investments in foreign securities when, in the judgment of the Investment
Adviser, it would be beneficial to convert such currency into U.S. dollars at
a later date, based on anticipated changes in the relevant exchange rate.
 
  Currency exchange rates may fluctuate significantly over short periods of
time causing, along with other factors, a Fund's net asset value to fluctuate.
Currency exchange rates generally are determined by the forces of supply and
demand in the foreign exchange markets and the relative merits of investments
in different countries, actual or anticipated changes in interest rates and
other complex factors, as seen from an international perspective. Currency
exchange rates also can be affected unpredictably by the intervention of U.S.
or foreign governments or central banks, or the failure to intervene, or by
currency controls or political developments in the U.S. or abroad. To the
extent that a substantial portion of a Fund's total assets, adjusted to
reflect the Fund's net position after giving effect to currency transactions,
is denominated or quoted in the currencies of foreign
 
                                      29
<PAGE>
 
countries, the Fund will be more susceptible to the risk of adverse economic
and political developments within those countries.
 
  The market in forward foreign currency exchange contracts, currency swaps
and other privately negotiated currency instruments offers less protection
against defaults by the other party to such instruments than is available for
currency instruments traded on an exchange. Such contracts are subject to the
risk that the counterparty to the contract will default on its obligations.
Since these contracts are not guaranteed by an exchange or clearinghouse, a
default on a contract would deprive a Fund of unrealized profits, transaction
costs or the benefits of a currency hedge or force the Fund to cover its
purchase or sale commitments, if any, at the current market price. A Fund will
not enter into forward foreign currency exchange contracts, currency swaps or
other privately negotiated currency instruments unless the credit quality of
the unsecured senior debt or the claims-paying ability of the counterparty is
considered to be investment grade by the Investment Adviser.
 
  The Core Fixed Income, Global Income and High Yield Funds' use of foreign
currency management techniques in emerging markets may be limited. Due to the
limited market for these instruments in emerging markets, the Investment
Adviser does not currently anticipate that a significant portion of the Funds'
currency exposure in emerging markets, if any, will be covered by such
instruments. For a discussion of such instruments and the risks associated
with their use, see "Investment Objectives and Policies" in the Additional
Statement.
 
STRUCTURED SECURITIES
 
  The Core Fixed Income, Global Income and High Yield Funds may invest in
structured securities. The value of the principal of and/or interest on such
securities is determined by reference to changes in the value of specific
currencies, interest rates, commodities, indices or other financial indicators
(the "Reference") or the relative change in two or more References. The
interest rate or the principal amount payable upon maturity or redemption may
be increased or decreased depending upon changes in the applicable Reference.
The terms of the structured securities may provide that in certain
circumstances no principal is due at maturity and, therefore, result in the
loss of a Fund's investment. Structured securities may be positively or
negatively indexed, so that appreciation of the Reference may produce an
increase or decrease in the interest rate or value of the security at
maturity. In addition, changes in the interest rates or the value of the
security at maturity may be a multiple of changes in the value of the
Reference. Consequently, structured securities may entail a greater degree of
market risk than other types of fixed-income securities. Structured securities
may also be more volatile, less liquid and more difficult to accurately price
than less complex securities.
 
ZERO COUPON, DEFERRED INTEREST, PAY-IN-KIND AND CAPITAL APPRECIATION BONDS
 
  Each Fund may invest in zero coupon, deferred interest and capital
appreciation bonds. These are securities issued at a discount from their face
value because interest payments are typically postponed until maturity. The
amount of the discount rate varies depending on factors including the time
remaining until maturity, prevailing interest rates, the security's liquidity
and the issuer's credit quality. These securities also may take the form of
debt securities that have been stripped of their interest payments. Each Fund
may also invest in pay-in-kind securities which are securities that have
interest payable by the delivery of additional securities. A portion of the
discount with respect to stripped tax-exempt securities or their coupons may
be taxable. The market prices of zero coupon, deferred interest, pay-in-kind
and capital appreciation bonds generally are more volatile than the market
prices of interest-bearing securities and are likely to respond to a greater
degree to changes in interest rates than interest-bearing securities having
similar maturities and credit quality. A Fund's investments in zero coupon,
deferred interest, pay-in-kind and capital appreciation bonds may require the
Fund to sell certain of its portfolio securities to generate sufficient cash
to satisfy certain income distribution requirements. See "Taxation" in the
Additional Statement.
 
                                      30
<PAGE>
 
 
                                 RISK FACTORS
 
 
  INTEREST RATE RISK. When interest rates decline, the market value of fixed-
income securities tends to increase. Conversely, when interest rates increase,
the market value of fixed-income securities tends to decline. Volatility of a
security's market value will differ depending upon the security's duration,
the issuer and the type of instrument.
 
  DEFAULT RISK/CREDIT RISK. Investments in fixed-income securities are subject
to the risk that the issuer could default on its obligations and a Fund could
sustain losses on such investments. A default could impact both interest and
principal payments.
 
  CALL RISK AND EXTENSION RISK. Fixed-income securities may be subject to both
call risk and extension risk. Call risk (i.e., where the issuer exercises its
right to pay principal on an obligation earlier than scheduled) causes cash
flow to be returned earlier than expected. Call risk typically results when
interest rates have declined. Under such circumstances, a Fund may be unable
to recoup all of its initial investment and will also suffer from having to
reinvest in lower yielding securities. Extension risk (i.e., where the issuer
exercises its right to pay principal on an obligation later than scheduled)
causes cash flows to be returned later than expected. Extension risk typically
results when interest rates have increased. Under such circumstances, a Fund
will suffer from the inability to invest in higher yielding securities.
Certain types of U.S. Government, Asset-Backed, corporate, foreign, Mortgage-
Backed and Municipal Securities have this call and/or extension risk.
 
  The investment characteristics of Mortgage-Backed Securities and Asset-
Backed Securities differ from those of traditional fixed-income securities
because they generally have both call risk (also known as prepayment risk) and
extension risk. Homeowners have the option to prepay their mortgage.
Therefore, the duration of a security backed by home mortgages can either
shorten (call risk) or lengthen (extension risk). Investors are exposed to the
fluctuating principal and interest payments associated with such securities.
In general, if interest rates on new mortgage loans fall sufficiently below
the interest rates on existing outstanding mortgage loans, the rate of
prepayment would be expected to increase. Conversely, if mortgage loan
interest rates rise above the interest rates on existing outstanding mortgage
loans, the rate of prepayment would be expected to decrease.
 
  ARMs also have the risk of prepayments, which will have a greater impact on
the Adjustable Rate Government Fund. The rate of principal prepayments with
respect to ARMs has fluctuated in recent years. As with fixed-rate mortgage
loans, ARMs may be subject to a greater rate of principal repayments in a
declining interest rate environment. For example, if prevailing interest rates
fall significantly, ARMs could be subject to higher prepayment rates (than if
prevailing interest rates remain constant or increase) because the
availability of low fixed-rate mortgages may encourage mortgagors to refinance
their ARMs to "lock-in" a fixed-rate mortgage. Conversely, if prevailing
interest rates rise significantly, ARMs may prepay more slowly. As with fixed-
rate mortgages, ARM prepayment rates vary in both stable and changing interest
rate environments. There are certain ARMs where the homeowner's payments do
not fully cover interest, so the principal balance increases over time. These
"negative amortizing" ARMs may be subject to greater default risk.
 
  DERIVATIVE MORTGAGE-BACKED SECURITIES. Because derivative Mortgage-Backed
Securities (such as principal-only (POs), interest-only (IOs) or inverse
floating rate securities) are more exposed to mortgage prepayments, they
generally involve a greater amount of risk. Small changes in prepayments can
significantly impact the cash flow and the market value of these securities.
The risk of faster than anticipated prepayments
 
                                      31
<PAGE>
 
generally adversely affects IOs, super floaters and premium priced Mortgage-
Backed Securities. The risk of slower than anticipated prepayments generally
adversely affects POs, floating-rate securities subject to interest rate caps,
support tranches and discount priced Mortgage-Backed Securities. In addition,
particular derivative securities may be leveraged such that their exposure
(i.e., price sensitivity) to interest rate and/or prepayment risk is
magnified.
 
  RISKS OF DERIVATIVE TRANSACTIONS. A Fund's transactions, if any, in options,
futures, options on futures, swaps, interest rate caps, floors and collars,
structured securities, inverse floating-rate securities and currency
transactions involve certain risks, including a possible lack of correlation
between changes in the value of hedging instruments and the portfolio assets
being hedged, the potential illiquidity of the markets for derivative
instruments, the risks arising from margin requirements and related leverage
factors associated with such transactions. The use of these management
techniques to seek to increase total return may be regarded as a speculative
practice and involves the risk of loss if the Investment Adviser is incorrect
in its expectation of fluctuations in securities prices, interest rates or
currency prices. A Fund's use of certain derivative transactions may be
limited by the requirements of the Internal Revenue Code of 1986, as amended
(the "Code") for qualification as a regulated investment company.
 
  TAX RISK OF MUNICIPAL SECURITIES. The yields and market values of Municipal
Securities may be more adversely impacted by changes in tax rates and policies
than taxable fixed-income securities. Because interest income from Municipal
Securities is normally not subject to regular federal income taxation, the
attractiveness of Municipal Securities in relation to other investment
alternatives is affected by changes in federal income tax rates applicable to,
or the continuing federal income tax-exempt status of, such interest income.
Any proposed or actual changes in such rates or exempt status, therefore, can
significantly affect the demand for and supply, liquidity and marketability of
Municipal Securities, which could in turn affect a Fund's ability to acquire
and dispose of Municipal Securities at desirable yield and price levels.
 
  RISKS OF INVESTING IN NON-INVESTMENT GRADE FIXED-INCOME SECURITIES. Non-
investment grade fixed-income securities are considered predominantly
speculative by traditional investment standards. In some cases, these
obligations may be highly speculative and have poor prospects for reaching
investment grade standing. Non-investment grade fixed-income securities and
unrated securities of comparable credit quality (commonly known as "junk
bonds") are subject to the increased risk of an issuer's inability to meet
principal and interest obligations. These securities, also referred to as high
yield securities, may be subject to greater price volatility due to such
factors as specific corporate developments, interest rate sensitivity,
negative perceptions of the junk bond markets generally and less secondary
market liquidity.
 
  Non-investment grade fixed-income securities are often issued in connection
with a corporate reorganization or restructuring or as part of a merger,
acquisition, takeover or similar event. They are also issued by less
established companies seeking to expand. Such issuers are often highly
leveraged and generally less able than more established or less leveraged
entities to make scheduled payments of principal and interest in the event of
adverse developments or business conditions.
 
  The market value of non-investment grade fixed-income securities tends to
reflect individual corporate developments to a greater extent than that of
higher rated securities which react primarily to fluctuations in the general
level of interest rates. As a result, a Fund's ability to achieve its
investment objectives may depend to a greater extent on the Investment
Adviser's judgment concerning the creditworthiness of issuers than funds which
invest in higher-rated securities. Issuers of non-investment grade fixed-
income securities may not be able to make use of more traditional methods of
financing and their ability to service debt obligations may be more adversely
 
                                      32
<PAGE>
 
affected than issuers of higher-rated securities by economic downturns,
specific corporate developments or the issuer's inability to meet specific
projected business forecasts. Negative publicity about the junk bond market
and investor perceptions regarding lower rated securities, whether or not
based on fundamental analysis, may depress the prices for such securities.
 
  A holder's risk of loss from default is significantly greater for non-
investment grade fixed-income securities than is the case for holders of other
debt securities because such non-investment grade securities are generally
unsecured and are often subordinated to the rights of other creditors of the
issuers of such securities. Investment by a Fund in defaulted securities poses
additional risk of loss should nonpayment of principal and interest continue
in respect of such securities. Even if such securities are held to maturity,
recovery by a Fund of its initial investment and any anticipated income or
appreciation is uncertain.
 
  The secondary market for non-investment grade fixed-income securities is
concentrated in relatively few market makers and is dominated by institutional
investors, including mutual funds, insurance companies and other financial
institutions. Accordingly, the secondary market for such securities is not as
liquid as, and is more volatile than, the secondary market for higher-rated
securities. In addition, market trading volume for high yield fixed-income
securities is generally lower and the secondary market for such securities
could contract under adverse market or economic conditions, independent of any
specific adverse changes in the condition of a particular issuer. These
factors may have an adverse effect on the market price and a Fund's ability to
dispose of particular portfolio investments. A less liquid secondary market
also may make it more difficult for a Fund to obtain precise valuations of the
high yield securities in its portfolio.
 
  Credit ratings issued by credit rating agencies are designed to evaluate the
safety of principal and interest payments of rated securities. They do not,
however, evaluate the market value risk of non-investment grade securities
and, therefore, may not fully reflect the true risks of an investment. In
addition, credit rating agencies may or may not make timely changes in a
rating to reflect changes in the economy or in the conditions of the issuer
that affect the market value of the security. Consequently, credit ratings are
used only as a preliminary indicator of investment quality. Investments in
non-investment grade and comparable unrated obligations will be more dependent
on the Investment Adviser's credit analysis than would be the case with
investments in investment-grade debt obligations. The Investment Adviser
employs its own credit research and analysis, which includes a study of
existing debt, capital structure, ability to service debt and to pay
dividends, the issuer's sensitivity to economic conditions, its operating
history and the current trend of earnings. The Investment Adviser continually
monitors the investments in a Fund's portfolio and evaluates whether to
dispose of or to retain non-investment grade and comparable unrated securities
whose credit ratings or credit quality may have changed.
 
  OTHER RISKS. Floating-rate derivative debt securities present more complex
types of interest rate risks. For example, range floaters are subject to the
risk that the coupon will be reduced below market rates if a designated
interest rate floats outside of a specified interest rate band or collar. Dual
index or yield curve floaters are subject to lower prices in the event of an
unfavorable change in the spread between two designated interest rates.
 
  Asset-Backed Securities present certain credit risks that are not presented
by Mortgage-Backed Securities because Asset-Backed Securities generally do not
have the benefit of a security interest in collateral that is comparable to
mortgage assets. There is the possibility that, in some cases, recoveries on
repossessed collateral may not be available to support payments on these
securities.
 
  FOREIGN RISKS. See "Foreign Securities" for a description of the risks of
investing in foreign securities and currencies.
 
                                      33
<PAGE>
 
 
                             INVESTMENT TECHNIQUES
 
 
  MORTGAGE DOLLAR ROLLS. The Adjustable Rate Government, Short Duration
Government, Government Income, Core Fixed Income and Global Income Funds may
enter into mortgage "dollar rolls" in which a Fund sells securities for
delivery in the current month and simultaneously contracts with the same
counterparty to repurchase substantially similar (same type, coupon and
maturity) but not identical securities on a specified future date. During the
roll period, the Fund loses the right to receive principal and interest paid
on the securities sold. However, the Fund would benefit to the extent of any
difference between the price received for the securities sold and the lower
forward price for the future purchase or fee income plus the interest earned
on the cash proceeds of the securities sold until the settlement date for the
forward purchase. Unless such benefits exceed the income, capital appreciation
and gain or loss due to mortgage prepayments that would have been realized on
the securities sold as part of the mortgage dollar roll, the use of this
technique will diminish the investment performance of the Fund. Successful use
of mortgage dollar rolls depends upon the Investment Adviser's ability to
predict correctly interest rates and mortgage prepayments. There is no
assurance that mortgage dollar rolls can be successfully employed. The Fund
will hold and maintain in a segregated account until the settlement date cash
or liquid assets in an amount equal to the forward purchase price. For
financial reporting and tax purposes, each Fund treats mortgage dollar rolls
as two separate transactions; one involving the purchase of a security and a
separate transaction involving a sale. The Funds do not currently intend to
enter into mortgage dollar rolls that are accounted for as a financing.
 
  OPTIONS ON SECURITIES AND SECURITIES INDICES. Each Fund may write (sell)
covered call and put options and purchase put and call options on any
securities in which it may invest or on any securities index comprised of
securities in which it may invest. The writing and purchase of options is a
highly specialized activity which involves investment techniques and risks
different from those associated with ordinary portfolio securities
transactions. The use of options to seek to increase total return involves the
risk of loss if the Investment Adviser is incorrect in its expectation of
fluctuations in securities prices or interest rates. The successful use of
options for hedging purposes also depends in part on the ability of the
Investment Adviser to manage future price fluctuations and the degree of
correlation between the options and securities markets. If the Investment
Adviser is incorrect in its expectation of changes in securities prices or
determination of the correlation between the securities indices on which
options are written and purchased and the securities in a Fund's investment
portfolio, the investment performance of the Fund will be less favorable than
it would have been in the absence of such options transactions. The writing of
options could increase a Fund's portfolio turnover rate and, therefore,
associated brokerage commissions or spreads.
 
  OPTIONS ON FOREIGN CURRENCIES. The Core Fixed Income, Global Income and High
Yield Funds may, to the extent they invest in foreign securities, purchase and
sell (write) put and call options on foreign currencies for the purpose of
protecting against declines in the U.S. dollar value of foreign portfolio
securities and against increases in the U.S. dollar cost of foreign securities
to be acquired. In addition, the Core Fixed Income, Global Income and High
Yield Funds may use options on currency to cross-hedge, which involves writing
or purchasing options on one currency to hedge against changes in exchange
rates for a different currency, if there is a pattern of correlation between
the two currencies. As with other kinds of option transactions, however, the
writing of an option on foreign currency will constitute only a partial hedge,
up to the amount of the premium received. If an option that a Fund has written
is exercised, the Fund could be required to purchase or sell foreign
currencies at disadvantageous exchange rates, thereby incurring losses. The
purchase of an option on foreign currency may constitute an effective hedge
against exchange rate fluctuations; however, in the event of exchange rate
 
                                      34
<PAGE>
 
movements adverse to a Fund's position, the Fund may forfeit the entire amount
of the premium plus related transaction costs. In addition to purchasing put
and call options for hedging purposes, a Fund may purchase call or put options
on currency to seek to increase total return when the Investment Adviser
anticipates that the currency will appreciate or depreciate in value, but the
securities quoted or denominated in that currency do not present attractive
investment opportunities and are not held in the Fund's portfolio. When
purchased or sold to seek to increase total return, options on currencies are
considered speculative. Options on foreign currencies to be written or
purchased by the Funds will be traded on U.S. and foreign exchanges or over-
the-counter.
 
  FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS. To seek to increase
total return, to hedge against changes in interest rates or securities prices,
or in the case of the Core Fixed Income, Global Income and High Yield Funds,
currency exchange rates, a Fund may purchase and sell various kinds of futures
contracts, and purchase and write call and put options on any of such futures
contracts. Each Fund may also enter into closing purchase and sale
transactions with respect to any such contracts and options. The futures
contracts may be based on various securities (such as U.S. Government
Securities), foreign currencies, in the case of the Core Fixed Income, Global
Income and High Yield Funds, securities indices and other financial
instruments and indices. A Fund will engage in futures and related options
transactions for bona fide hedging purposes as defined in regulations of the
Commodity Futures Trading Commission or to seek to increase total return to
the extent permitted by such regulations. A Fund may not purchase or sell
futures contracts or purchase or sell related options to seek to increase
total return, except for closing purchase or sale transactions, if immediately
thereafter the sum of the amount of initial margin deposits and premiums paid
on a Fund's outstanding positions in futures and related options entered into
for the purpose of seeking to increase total return would exceed 5% of the
market value of a Fund's net assets. These transactions involve brokerage
costs, require margin deposits and, in the case of contracts and options
obligating a Fund to purchase securities or currencies, require the Fund to
segregate and maintain cash or liquid assets with a value equal to the amount
of the Fund's obligations or to otherwise cover the obligations in a manner
permitted by the SEC.
 
  While transactions in futures contracts and options on futures may reduce
certain risks, such transactions themselves entail certain other risks. See
"Investment Techniques--Futures Contracts and Options on Futures Contracts" in
the Additional Statement. Thus, while a Fund may benefit from the use of
futures and options on futures, unanticipated changes in interest rates,
securities prices or currency exchange rates may result in a poorer overall
performance than if the Fund had not entered into any futures contracts or
options transactions. Because perfect correlation between a futures position
and portfolio position that is intended to be protected is impossible to
achieve, the desired protection may not be obtained and a Fund may be exposed
to risk of loss. The loss incurred by a Fund in entering into futures
contracts and in writing call options on futures is potentially unlimited and
may exceed the amount of the premium received. Futures markets are highly
volatile and the use of futures may increase the volatility of a Fund's net
asset value. The profitability of a Fund's trading in futures to seek to
increase total return depends upon the ability of the Investment Adviser to
analyze correctly the futures markets. In addition, because of the low margin
deposits normally required in futures trading, a relatively small price
movement in a futures contract may result in substantial losses to a Fund.
Further, futures contracts and options on futures may be illiquid, and
exchanges may limit fluctuations in futures contract prices during a single
day.
 
  CURRENCY SWAPS. The Core Fixed Income, Global Income and High Yield Funds
may enter into currency swaps for hedging purposes or to seek to increase
total return. Currency swaps involve the exchange by a Fund with another party
of their respective rights to make or receive payments in specified
currencies. Currency swaps usually involve the delivery of a gross payment
stream in one designated currency in exchange for the gross payment stream in
another designated currency. Therefore, the entire payment stream under a
currency swap is
 
                                      35
<PAGE>
 
subject to the risk that the other party to the swap will default on its
contractual delivery obligations. A Fund will not enter into swap transactions
unless the unsecured commercial paper, senior debt or claims-paying ability of
the other party thereto is rated investment grade by S&P or Moody's, or, if
unrated by such rating organizations, determined to be of comparable quality
by the Investment Adviser. The use of currency swaps is a highly specialized
activity which involves investment techniques and risks different from those
associated with ordinary portfolio securities transactions. If the Investment
Adviser is incorrect in its forecasts of currency exchange rates, the
investment performance of a Fund would be less favorable than it would have
been if this investment technique were not used.
 
  WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS. Each Fund may purchase when-
issued securities. When-issued transactions arise when securities are
purchased by a Fund with payment and delivery taking place in the future in
order to secure what is considered to be an advantageous price and yield to
the Fund at the time of entering into the transaction. Each Fund may also
purchase or sell securities on a forward commitment basis; that is, make
contracts to purchase or sell securities for a fixed price at a future date
beyond the customary three-day settlement. The purchase of securities on a
when-issued or forward commitment basis involves a risk of loss if the value
of the security to be purchased declines prior to the settlement date.
Conversely, securities sold on a forward commitment basis involve the risk
that the value of the securities to be sold may increase prior to the
settlement date. Although a Fund would generally purchase securities on a
when-issued or forward commitment basis with the intention of acquiring
securities for its portfolio, a Fund may dispose of when-issued securities or
forward commitments prior to settlement if the Investment Adviser deems it
appropriate to do so. A Fund is required to hold and maintain in a segregated
account with the Fund's custodian until three days prior to settlement date,
cash or liquid assets in an amount sufficient to meet the purchase price.
Alternatively, each Fund may enter into offsetting contracts for the forward
sale of other securities that it owns.
 
  ILLIQUID AND RESTRICTED SECURITIES. A Fund may not invest more than 15% of
its net assets in illiquid investments, which include securities (both foreign
and domestic) that are not readily marketable, certain SMBS, certain municipal
leases and participation interests, repurchase agreements maturing in more
than seven days, time deposits with a notice or demand period of more than
seven days, certain over-the-counter options, and certain restricted
securities, unless it is determined, based upon the continuing review of the
trading markets for a specific restricted security, that such restricted
security is eligible for resale under Rule 144A under the Securities Act of
1933 and, therefore, is liquid. The Trustees have adopted guidelines under
which the Investment Adviser determines and monitors the liquidity of
portfolio securities subject to the oversight of the Trustees. Investing in
restricted securities eligible for resale pursuant to Rule 144A may decrease
the liquidity in a Fund to the extent that qualified institutional buyers
become for a time uninterested in purchasing these restricted securities. The
purchase price and subsequent valuation of restricted and illiquid securities
normally reflect a discount, which may be significant, from the market price
of comparable securities for which a liquid market exists.
 
  REPURCHASE AGREEMENTS. Each Fund may enter into repurchase agreements with
dealers in U.S. Government Securities and member banks of the Federal Reserve
System which furnish collateral at least equal in value or market price to the
amount of their repurchase obligation. The Core Fixed Income, Global Income
and High Yield Funds may also enter into repurchase agreements involving
certain foreign government securities. If the other party or "seller"
defaults, a Fund might suffer a loss to the extent that the proceeds from the
sale of the underlying securities and other collateral held by the Fund in
connection with the related repurchase agreement are less than the repurchase
price. In addition, in the event of bankruptcy of the seller or failure of the
seller to repurchase the securities as agreed, a Fund could suffer losses,
including loss of interest on or principal of the security and costs
associated with delay and enforcement of the repurchase agreement. The
 
                                      36
<PAGE>
 
Trustees have reviewed and approved certain counterparties whom they believe
to be creditworthy and have authorized the Funds to enter into repurchase
agreements with such counterparties. In addition, each Fund, together with
other registered investment companies having management agreements with the
Investment Adviser, may transfer uninvested cash balances into a single joint
account, the daily aggregate balance of which will be invested in one or more
repurchase agreements.
 
  TEMPORARY INVESTMENTS. Each Fund may, for temporary defensive purposes,
invest up to 100% of its total assets in (i) U. S. Government Securities or
(ii) repurchase agreements collateralized by U.S. Government Securities. The
Short Duration Tax-Free and Municipal Income Funds may for temporary defensive
purposes depart from their stated investment objectives and invest more than
20% of their respective net assets in taxable investments. The High Yield Fund
may for temporary defensive purposes invest in investment grade securities.
 
MISCELLANEOUS TECHNIQUES
 
  In addition to the techniques and investments described above, each Fund
may, with respect to no more than 5% of its net assets, engage in the
following techniques and investments: (i) portfolio securities lending, (ii)
mortgage swaps (other than Short Duration Tax-Free and Municipal Income
Funds), interest rate swaps, caps, floors and collars and credit swaps, (iii)
inverse floating-rate securities, (iv) yield curve options, (v) other
investment companies, (vi) custodial receipts, (vii) with respect to the Short
Duration Tax-Free and Municipal Income Funds, tender option bonds and standby
commitments and (viii) reverse repurchase agreements for investment purposes.
 
  In addition, each Fund may borrow up to 33 1/3% of its total assets from
banks for temporary or emergency purposes. A Fund may not make additional
investments if borrowings (excluding covered mortgage dollar rolls) exceed 5%
of its total assets. For more information, see the Additional Statement.
 
 
                            INVESTMENT RESTRICTIONS
 
 
  Each Fund is subject to certain investment restrictions that are described
in detail under "Investment Restrictions" in the Additional Statement.
Fundamental investment restrictions of a Fund cannot be changed without
approval of a majority of the outstanding shares of that Fund, as defined in
the Additional Statement. Each Fund's investment objectives and all policies
not specifically designated as fundamental are non-fundamental and may be
changed without shareholder approval. If there is a change in a Fund's
investment objectives, shareholders should consider whether that Fund still
remains an appropriate investment in light of their then current financial
positions and needs.
 
  The Short Duration Tax-Free and Municipal Income Funds' policy to invest,
under normal market conditions, at least 80% of their respective net assets in
Municipal Securities, the interest on which is exempt from regular federal
income tax, is fundamental and may not be changed without shareholder
approval. For more information on a Fund's investment restrictions, an
investor should obtain the Additional Statement.
 
  NON-DIVERSIFIED STATUS. Since the Global Income Fund is "non-diversified"
under the Act, it is subject only to certain federal tax diversification
requirements. Under federal tax laws, the Global Income Fund may, with respect
to 50% of its total assets, invest up to 25% of its total assets in the
securities of any issuer (except that this limitation does not apply to U.S.
Government Securities). With respect to the remaining 50% of the
 
                                      37
<PAGE>
 
Fund's total assets, (1) the Fund may not invest more than 5% of its total
assets in the securities of any one issuer (other than the U.S. government),
and (2) the Fund may not acquire more than 10% of the outstanding voting
securities of any one issuer. These tests apply at the end of each quarter of
its taxable year and are subject to certain conditions and limitations under
the Code. Since the Global Income Fund is not diversified under the Act, it
will be more susceptible to adverse developments affecting any single issuer.
The Adjustable Rate Government, Short Duration Government, Short Duration Tax-
Free, Government Income, Municipal Income, Core Fixed Income and High Yield
Funds are, in addition to these tax diversification requirements, also subject
to the diversification requirements arising out of their diversified status
under the Act.
 
 
                              PORTFOLIO TURNOVER
 
 
  Each Fund may engage in active short-term trading to benefit from yield
disparities among different issues of securities or among the markets for
fixed-income securities, or for other reasons. It is anticipated that the
portfolio turnover rate of each Fund will vary from year to year. The
portfolio turnover rate is computed by dividing the lesser of the dollar
amount of securities purchased or securities sold (excluding all securities
whose maturities at acquisition are one year or less) by the average monthly
value of such securities owned during the year. A 100% turnover rate would
occur, for example, if all of the securities held by a Fund were sold and
replaced within one year. The Investment Adviser will not consider the
portfolio turnover rate a limiting factor in making investment decisions for a
Fund consistent with the Fund's investment objectives and portfolio management
policies. A high rate of portfolio turnover results in increased transaction
costs to a Fund. The portfolio turnover rate includes the effect of entering
into mortgage dollar rolls. See "Financial Highlights" for a statement of each
Fund's historical portfolio turnover rates.
 
 
                                  MANAGEMENT
 
 
TRUSTEES AND OFFICERS
 
  The Trustees are responsible for deciding matters of general policy and
reviewing the actions of the Investment Advisers, distributor and transfer
agent. The officers of the Trust conduct and supervise each Fund's daily
business operations. The Additional Statement contains information as to the
identity of, and other information about, the Trustees and officers of the
Trust.
 
INVESTMENT ADVISERS
 
  INVESTMENT ADVISERS. Goldman Sachs Funds Management, L.P., One New York
Plaza, New York, New York 10004, a Delaware limited partnership which is an
affiliate of Goldman Sachs, serves as investment adviser to the Adjustable
Rate Government and Short Duration Government Funds. Goldman Sachs Funds
Management, L.P. registered as an investment adviser in 1990. Goldman Sachs
Asset Management, One New York Plaza, New York, New York 10004, a separate
operating division of Goldman Sachs, serves as the investment adviser to the
Short Duration Tax-Free, Government Income, Municipal Income, Core Fixed
Income and High Yield Funds. Goldman Sachs registered as an investment adviser
in 1981. Goldman Sachs Asset Management International, 133 Peterborough Court,
London EC4A 2BB, England, an affiliate of Goldman Sachs, serves as investment
adviser to the Global Income Fund. Goldman Sachs Asset Management
International became a member of the
 
                                      38
<PAGE>
 
Investment Management Regulatory Organization Limited in 1990 and registered
as an investment adviser in 1991. The Goldman Sachs Group, L.P., which
controls the Investment Advisers, has announced that it will pursue an initial
public offering of the firm during the fourth quarter of 1998; if the public
offering is consummated, The Goldman Sachs Group, L.P. will merge into the new
public company, which will be called The Goldman Sachs Group, Inc. As of July
24, 1998, GSAM, GSFM and GSAMI, together with their affiliates, acted as
investment adviser or distributor for assets in excess of $168 billion.
 
  Under a Management Agreement with each Fund, the applicable Investment
Adviser, subject to the general supervision of the Trustees, provides day-to-
day advice as to the Fund's portfolio transactions. Goldman Sachs has agreed
to permit the Funds to use the name "Goldman Sachs" or a derivative thereof as
part of each Fund's name for as long as a Fund's Management Agreement is in
effect.
 
  In performing its investment advisory services, each Investment Adviser,
while remaining ultimately responsible for the management of the Funds, is
able to draw upon the research and expertise of its asset management
affiliates for portfolio decisions and management with respect to certain
portfolio securities. In addition, the Investment Advisers will have access to
the research of, and certain proprietary technical models developed by,
Goldman Sachs and may apply quantitative and qualitative analysis in
determining the appropriate allocations among the categories of issuers and
types of securities.
 
  Under the Management Agreement, each Investment Adviser also: (i) supervises
all non-advisory operations of each Fund that it advises; (ii) provides
personnel to perform such executive, administrative and clerical services as
are reasonably necessary to provide effective administration of each Fund;
(iii) arranges for at each Fund's expense (a) the preparation of all required
tax returns, (b) the preparation and submission of reports to existing
shareholders, (c) the periodic updating of prospectuses and Additional
Statements and (d) the preparation of reports to be filed with the SEC and
other regulatory authorities; (iv) maintains each Fund's records; and (v)
provides the Funds with office space and all necessary office equipment and
services.
 
  ADJUSTABLE RATE GOVERNMENT AND SHORT DURATION GOVERNMENT FUNDS. The Funds'
portfolio managers are Jonathan A. Beinner, Richard C. Lucy, James B. Clark,
Peter D. Dion and James P. McCarthy. Their responsibilities include investing
in the particular types of securities the Funds may hold. Mr. Beinner is a
Managing Director of Goldman Sachs and Co-Head of GSAM's U.S. Fixed Income
Department. Mr. Beinner joined the Investment Adviser in 1990. Mr. Lucy is a
Vice President of Goldman Sachs and Co-Head of GSAM's U.S. Fixed Income
Department. Mr. Lucy joined the Investment Adviser in 1992. Mr. Clark joined
GSAM in 1994 after working as a senior trader at the Federal Home Loan
Mortgage Corporation. Prior to that, he was an investment manager at Travelers
Insurance Company. Mr. Dion is a Vice President of Goldman Sachs and joined
GSAM in 1992. Mr. McCarthy is a Vice President of Goldman Sachs. Mr. McCarthy
joined GSAM in 1995 after working as a bond trader at Nomura Securities.
 
  GOVERNMENT INCOME AND CORE FIXED INCOME FUNDS. The Funds' portfolio managers
are Jonathan A. Beinner and Richard C. Lucy. See above for information about
Mr. Beinner and Mr. Lucy. Messrs. Beinner and Lucy each specialize in
investing in a particular type of security the Fund may hold. James Clark is
also a portfolio manager for the Government Income Fund. See above for
information about Mr. Clark.
 
  SHORT DURATION TAX-FREE AND MUNICIPAL INCOME FUNDS. The Funds' portfolio
managers are Benjamin S. Thompson and Elisabeth Schupf Lonsdale. Mr. Thompson
and Ms. Lonsdale each specialize in municipal securities. Mr. Thompson's
responsibilities include developing investment strategy and structuring
portfolios. Ms. Lonsdale is also responsible for GSAM's municipal credit
research. Mr. Thompson worked in the institutional sales and marketing group
at GSAM until he joined the fixed-income team in 1993. Prior to joining GSAM
in early 1992, Mr. Thompson worked in the Structured Finance Group of the
Chase Manhattan Bank.
 
                                      39
<PAGE>
 
Before rejoining Goldman Sachs in 1995, Ms. Lonsdale was a Director of Fitch
Investors Service evaluating the credit ratings of tax-backed issues. Prior to
that, she worked for ten years in the Goldman Sachs Municipal Finance
Department.
 
  GLOBAL INCOME FUND. The Fund's portfolio managers are Stephen Fitzgerald and
Andrew Wilson. Mr. Fitzgerald joined GSAMI in 1992 and is an Executive
Director and Chief Investment Officer for international fixed income. Mr.
Wilson joined GSAMI in 1995 and is Executive Director and Portfolio Manager
for international fixed income. Prior to joining GSAMI, he spent three years
as an Assistant Director at Rothschild Asset Management where he was
responsible for managing global and international bond portfolios, with
specific focus on the U.S., Canadian, Australian and Japanese economies.
 
  HIGH YIELD FUND. The Fund's portfolio managers are Andrew Jessop,
Christopher Testa, Rachel Golder and Michael L. Pasternak. Mr. Jessop is a
Vice President of Goldman Sachs and is responsible for managing high yield
assets. Mr. Jessop joined GSAM in 1997. Prior to joining GSAM, Mr. Jessop
spent six years managing high yield portfolios at Saudi International Bank in
London. Prior to that, he worked for the bank on the interest rate swap desk
and served as an investment analyst in New York. Mr. Testa is a Vice President
of Goldman Sachs and Director of Credit Research responsible for corporate
bond research. Mr. Testa is responsible for managing high yield assets. Mr.
Testa joined GSAM in 1994. Prior to joining GSAM, Mr. Testa was a credit
analyst with CS First Boston and prior to that he was an analyst for
Metropolitan Life Insurance Company investing in private placements and public
debt. Ms. Golder is a Vice President of Goldman Sachs and is responsible for
managing high yield assets. Ms. Golder joined GSAM in 1997. Prior to joining
GSAM, Ms. Golder spent six years at Saudi International Bank as a high yield
credit analyst and portfolio manager. Prior to that, Ms. Golder was with
Kleinwort Benson Ltd., where she managed investments in corporate loans. Mr.
Pasternak is a Vice President of Goldman Sachs and is the product manager for
high yield assets. Mr. Pasternak also contributes to the management of high
yield assets. Mr. Pasternak joined GSAM in 1997. Prior to joining GSAM, Mr.
Pasternak spent eight years managing high yield corporate bond and loan
portfolios at Saudi International Bank (an affiliate of JP Morgan) in London.
Prior to that, he was an officer of the bank in Eurocurrency Lending and
Syndications and served as an investment analyst in New York.
 
  It is the responsibility of the Investment Adviser to make the investment
decisions for a Fund and to place the purchase and sale orders for a Fund's
portfolio transactions in U.S. and foreign markets. Such orders may be
directed to any broker including, to the extent and in the manner permitted by
applicable law, Goldman Sachs or its affiliates. In effecting purchases and
sales of portfolio securities for the Funds, the Investment Advisers will seek
the best price and execution of a Fund's orders. In doing so, where two or
more brokers or dealers offer comparable prices and execution for a particular
trade, consideration may be given to whether the broker or dealer provides
investment research or brokerage services or sells shares of any Goldman Sachs
Fund. See the Additional Statement for a further description of the Investment
Advisers' brokerage allocation practices.
 
 
                                      40
<PAGE>
 
  As compensation for its services rendered and assumption of certain expenses
pursuant to separate Management Agreements, GSAM, GSFM and GSAMI are entitled
to the following fees, computed daily and payable monthly at the annual rates
listed below:
<TABLE>
<CAPTION>
                                            FOR THE FISCAL
                             CONTRACTUAL YEAR OR PERIOD ENDED       AS OF
                                RATE*     OCTOBER 31,  1997*  SEPTEMBER 1, 1998
                             ----------- -------------------- -----------------
<S>                          <C>         <C>                  <C>
GSAM
- ----
  Short Duration Tax-Free...    0.40%           0.40%               0.35%
  Government Income.........    0.65%           0.25%               0.54%
  Municipal Income..........    0.55%           0.55%               0.50%
  Core Fixed Income.........    0.40%           0.40%               0.40%
  High Yield................    0.70%           0.65%               0.70%
GSFM
- ----
  Adjustable Rate
   Government...............    0.40%           0.40%               0.40%
  Short Duration
   Government...............    0.50%           0.40%               0.50%
GSAMI
- -----
  Global Income.............    0.90%           0.59%               0.65%
</TABLE>
- --------
*  The difference, if any, between the stated fees and the actual fees paid by
   the Funds reflects that the applicable Investment Adviser did not charge
   the full amount of the fees to which it would have been entitled for the
   year ended October 31, 1997. The Investment Adviser may discontinue or
   modify any limitations in the future at its discretion.
 
  The Investment Adviser has voluntarily agreed to reduce or limit certain
"Other Expenses" of the Funds (excluding management fees, service fees,
transfer agency fees, taxes, interest and brokerage fees and litigation,
indemnification and other extraordinary expenses) to the extent such expenses
exceed 0.05%, 0.00%, 0.00%, 0.00%, 0.00%, 0.10%, 0.00% and 0.02% per annum of
the average daily net assets of the Adjustable Rate Government, Short Duration
Government, Short Duration Tax-Free, Government Income, Municipal Income, Core
Fixed Income, Global Income and High Yield Funds', respectively. Such
reductions or limits, if any, may be discontinued or modified by the
applicable Investment Adviser in its discretion at any time.
 
  ACTIVITIES OF GOLDMAN SACHS AND ITS AFFILIATES AND OTHER ACCOUNTS MANAGED BY
GOLDMAN SACHS. The involvement of the Investment Advisers, Goldman Sachs and
their affiliates in the management of, or their interest in, other accounts
and other activities of Goldman Sachs may present conflicts of interest with
respect to a Fund or limit a Fund's investment activities. Goldman Sachs and
its affiliates engage in proprietary trading and advise accounts and funds
which have investment objectives similar to those of the Funds and/or which
engage in and compete for transactions in the same types of securities,
currencies and instruments as the Funds. Goldman Sachs and its affiliates will
not have any obligation to make available any information regarding their
proprietary activities or strategies, or the activities or strategies used for
other accounts managed by them, for the benefit of the management of the
Funds. The results of a Fund's investment activities, therefore, may differ
from those of Goldman Sachs and its affiliates and it is possible that a Fund
could sustain losses during periods in which Goldman Sachs and its affiliates
and other accounts achieve significant profits on their trading for
proprietary or other accounts. In addition, the Funds may, from time to time,
enter into transactions in which other clients of Goldman Sachs have an
adverse interest. From time to time, a Fund's activities may be limited
because of
 
                                      41
<PAGE>
 
regulatory restrictions applicable to Goldman Sachs and its affiliates, and/or
their internal policies designed to comply with such restrictions. See
"Management -- Activities of Goldman Sachs and its Affiliates and Other
Accounts Managed by Goldman Sachs" in the Additional Statement for further
information.
 
DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs, 85 Broad Street, New York, New York 10004, serves as the
exclusive distributor (the "Distributor") of each Fund's shares. Goldman
Sachs, 4900 Sears Tower, Chicago, Illinois 60606, also serves as each Fund's
transfer agent (the "Transfer Agent") and as such performs various shareholder
servicing functions. Shareholders with inquiries regarding any Fund should
contact Goldman Sachs (as Transfer Agent) at the address or the telephone
number set forth on the back cover page of this Prospectus. Goldman Sachs is
entitled to receive a transfer agency fee with respect to each Fund's
Institutional and Service shares equal, on an annual basis, to 0.04% of
average daily net assets.
 
  From time to time, Goldman Sachs or any of its affiliates may purchase and
hold shares of the Funds. Goldman Sachs reserves the right to redeem at any
time some or all of the shares acquired for its own account.
 
YEAR 2000
 
  Many computer systems were designed using only two digits to signify the
year (for example, "98" for "1998"). On January 1, 2000, if these computer
systems are not corrected, they may incorrectly interpret "00" as the year
"1900" rather than the year "2000," leading to computer shutdowns or errors
(commonly known as the "Year 2000 Problem"). To the extent these systems
conduct forward-looking calculations, these computer problems may occur prior
to January 1, 2000. Like other investment companies and financial and business
organizations, the Funds could be adversely affected in their ability to
process securities trades, price securities, provide shareholder account
services and otherwise conduct normal business operations if the computer
systems used by the Investment Adviser or other Fund service providers do not
adequately address this problem in a timely manner. The Investment Adviser has
established a dedicated group to analyze these issues and to implement the
systems modifications necessary to prepare for the Year 2000 Problem.
Currently, the Investment Adviser does not anticipate that the transition to
the 21st century will have any material impact on its ability to continue to
service the Funds at current levels. In addition, the Investment Adviser has
sought assurances from the Funds' other service providers that they are taking
the steps necessary so that they do not experience Year 2000 Problems, and the
Investment Adviser will continue to monitor the situation. At this time,
however, no assurance can be given that the actions taken by the Investment
Adviser and the Funds' other service providers will be sufficient to avoid any
adverse effect on the Funds due to the Year 2000 Problem.
 
 
                                   DIVIDENDS
 
 
  Each Fund (other than the Global Income Fund) will declare a daily dividend
which will be paid monthly. The Global Income Fund will declare and pay
dividends monthly. Over the course of the fiscal year, dividends accrued and
paid will constitute all or substantially all of the Funds' net investment
income. From time to time a portion of such dividends may constitute a return
of capital. In the case of Core Fixed Income, Global Income and High Yield
Funds, net loss, if any, from certain foreign currency transactions or
instruments that is otherwise taken into account in calculating net investment
income or net realized capital gains for accounting purposes may not be taken
into account in determining the amount of dividends to be declared and paid,
with the result
 
                                      42
<PAGE>
 
that a portion of the Fund's dividends may be treated as a return of capital,
nontaxable to the extent of a shareholder's tax basis in his shares. The Funds
also intend that all net realized capital gains will be declared as a dividend
at least annually. In determining amounts of capital gains to be distributed,
capital losses, including any available capital loss carryovers from prior
years will be offset against capital gains.
 
  A Fund's net investment income is determined on a daily basis (monthly in
the case of the Global Income Fund). On days on which net asset value is
calculated, such determination is made immediately prior to the calculation of
a Fund's net asset value. On days on which net asset value is not calculated,
such determination is made as of 3:00 p.m. Chicago time.
 
  Payment of dividends (other than the Global Income Fund) from net investment
income will be made on the last calendar day of each month in additional
shares of a Fund at the net asset value on such day, unless cash distributions
are elected, in which case, cash payment will be made on the first Business
Day of the succeeding month. In the case of Global Income Fund, reinvestment
of dividends from net investment income in additional shares of the Fund will
be made on the second to last Business Day of each month. Cash dividends will
be paid on or about the last Business Day of the month. Payment of dividends
with respect to capital gains, if any, when declared will be made in
additional shares of the Fund at the net asset value on the payment date,
unless cash distributions are elected. This election to receive dividends in
cash is initially made on the Account Information Form and may be changed upon
written notice to the Transfer Agent at any time prior to the record date for
a particular dividend or distribution. If cash dividends are elected with
respect to the Fund's monthly net investment income dividends, then cash
dividends must also be elected with respect to the non-long-term capital gains
component, if any, of the Fund's annual dividend.
 
  At the time of an investor's purchase of shares of a Fund, a portion of the
net asset value per share may be represented by undistributed income (in the
case of the Global Income Fund) or realized or unrealized appreciation of any
Fund's portfolio securities. Therefore, subsequent distributions on such
shares from such income or realized appreciation may be taxable to the
investor even if the net asset value of the shares is, as a result of the
distributions, reduced below the cost of such shares and the distributions (or
portions thereof) represent a return of a portion of the purchase price.
 
 
                                   EXPENSES
 
 
  The Funds are responsible for the payment of their expenses. The expenses
include, without limitation; fees payable to the Investment Adviser; service
fees paid to Service Organizations; custodial and transfer agency fees;
brokerage fees and commissions; filing fees for the registration or
qualification of the Funds' shares under federal or state securities laws,
organizational expenses; fees and expenses incurred in connection with
membership in investment company organizations; taxes; interest; costs of
liability insurance, fidelity bonds or indemnification; any costs, expenses or
losses arising out of any liability of, or claim for damages or other relief
asserted against, the Funds for violation of any law; legal and auditing fees
and expenses (including the cost of legal and certain accounting services
rendered by employees of the Investment Adviser and its affiliates with
respect to the Funds); expenses of preparing and setting in type prospectuses,
Additional Statements, proxy material, reports and notices and the printing
and distributing of the same to shareholders and regulatory authorities;
compensation and expenses of the Trust's "non-interested" Trustees; and
extraordinary expenses, if any, incurred by the Trust.
 
                                      43
<PAGE>
 
 
                                NET ASSET VALUE
 
 
  The net asset value per share of each class of a Fund is calculated by the
Fund's custodian as of the close of regular trading on the New York Stock
Exchange (normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m. New York
time) on each Business Day (as such term is defined under "Additional
Information") immediately after the determination, if any, of the income to be
declared as a dividend (except in the case of the Global Income Fund). Net
asset value per share of each class is calculated by determining the net
assets of each class and dividing by the number of outstanding shares of that
class.
 
  Each Fund's portfolio securities for which accurate market quotations are
readily available are valued on the basis of quotations, which may be
furnished by a pricing service or provided by dealers in such securities and
other portfolio securities are valued at fair value, based on yield
equivalents, a pricing matrix or other sources, under valuation procedures
established by the Trustees. Debt obligations with a remaining maturity of 60
days or less are valued at amortized cost. The Board of Trustees has
determined that the amortized cost of such securities approximates fair market
value.
 
 
                            PERFORMANCE INFORMATION
 
 
  From time to time each Fund may publish yield, distribution rate and average
annual total return and the Short Duration Tax-Free and Municipal Income Funds
may publish their tax equivalent yields in advertisements and communications
to shareholders or prospective investors. Average annual total return is
determined by computing the average annual percentage change in value of
$1,000 invested at the maximum public offering price for specified periods
ending with the most recent calendar quarter, assuming reinvestment of all
dividends and distributions at net asset value. The total return calculation
assumes a complete redemption of the investment at the end of the relevant
period. Each Fund may also from time to time advertise total return on a
cumulative, average, year-by-year or other basis for various specified periods
by means of quotations, charts, graphs or schedules. In addition to the above,
each Fund may from time to time advertise its performance relative to certain
averages, performance rankings, indices, other information prepared by
recognized mutual fund statistical services and investments for which reliable
performance information is available.
 
  Yield is computed by dividing net investment income earned during a recent
thirty-day period by the product of the average daily number of shares
outstanding and entitled to receive dividends during the period and the
maximum offering price per share on the last day of the relevant period. The
results are compounded on a bond equivalent (semiannual) basis and then
annualized. Net investment income per share is equal to the dividends and
interest earned during the period, reduced by accrued expenses for the period.
The calculation of net investment income for these purposes may differ from
the net investment income determined for accounting purposes.
 
  Tax equivalent yield represents the yield an investor would have to earn to
equal, after taxes, the Short Duration Tax-Free and Municipal Income Funds'
tax-free yield. Tax equivalent yield is calculated by dividing a Fund's tax-
exempt yield by one minus a stated federal tax rate.
 
  Quotations of distribution rates are calculated by annualizing the most
recent distribution of net investment income for a monthly, quarterly or other
relevant period and dividing this amount by the net asset value per share or
maximum public offering price on the last day of the period for which the
distribution rates are being calculated.
 
 
                                      44
<PAGE>
 
  Each Fund's yield, total return and distribution rate will be calculated
separately for each class of shares in existence. Because each class of shares
may be subject to different expenses, the yield, total return and distribution
rate calculations with respect to each class of shares for the same period
will differ. See "Shares of the Trust."
 
  Each Fund's performance quotations do not reflect any fees charged by a
Service Organization to its customer accounts in connection with investments
in the Funds. The investment results of a Fund will fluctuate over time and
any presentation of investment results for any prior period should not be
considered a representation of what an investment may earn or what the Fund's
performance may be in any future period. In addition to information provided
in shareholder reports, the Funds may, in their discretion, from time to time,
make a list of their holdings available to investors upon request.
 
 
                              SHARES OF THE TRUST
 
 
  Each Fund is a series of the Goldman Sachs Trust, which was formed under the
laws of the State of Delaware on January 28, 1997. The Funds were formerly
series of Goldman Sachs Trust, a Massachusetts business trust, and were
reorganized into the Trust as of April 30, 1997. The Trustees have authority
under the Trust's Declaration of Trust to create and classify shares of
beneficial interest in separate series, without further action by
shareholders. Additional series may be added in the future. The Trustees also
have authority to classify or reclassify any series or portfolio of shares
into one or more classes.
 
  When issued, shares are fully paid and non-assessable. In the event of
liquidation, shareholders are entitled to share pro rata in the net assets of
the applicable Fund available for distribution to such shareholders. All
shares are freely transferable and have no preemptive, subscription or
conversion rights. Shareholders are entitled to one vote per share, provided
that at the option of the Trustees, shareholders will be entitled to a number
of votes based upon the net asset values represented by their shares.
 
  The Trust does not intend to hold annual meetings of shareholders. However,
recordholders may, under certain circumstances, as permitted by the Act,
communicate with other shareholders in connection with requiring a special
meeting of shareholders. The Trustees will call a special meeting of
shareholders for the purpose of electing Trustees, if, at any time, less than
a majority of Trustees holding office at the time were elected by
shareholders.
 
  In the interest of economy and convenience, the Trust does not issue
certificates representing the Funds' shares. Instead, the Transfer Agent
maintains a record of each shareholder's ownership. Each shareholder receives
confirmation of purchase and redemption orders from the Transfer Agent. Fund
shares and any dividends and distributions paid by the Funds are reflected in
account statements from the Transfer Agent.
 
  As of February 1, 1998, the shareholders listed below owned beneficially and
of record 25% or more of the outstanding shares of the following Funds: Short
Duration Government Fund--State Street Bank and Trust Company, P.O. Box 1992,
Boston, MA 02105-1992 (29.64%); Core Fixed Income Fund--Vinson and Elkins
Lawyers, Retirement Plan, Texas Commerce Bank N.A., P.O. Box 2550, Houston, TX
77252-2558 (25.48%).
 
                                      45
<PAGE>
 
 
                                   TAXATION
 
 
FEDERAL TAXES
 
  Each Fund is treated as a separate entity for tax purposes, has elected to
be treated as a regulated investment company and intends to qualify for such
treatment for each taxable year under Subchapter M of the Code. To qualify as
such, a Fund must satisfy certain requirements relating to the sources of its
income, diversification of its assets and distribution of its income to
shareholders. As a regulated investment company, a Fund will not be subject to
federal income or excise tax on any net investment income and net realized
capital gains that are distributed to its shareholders in accordance with
certain timing requirements of the Code.
 
  The Short Duration Tax-Free and Municipal Income Funds intend to satisfy
certain requirements of the Code so that they may distribute the tax-exempt
interest they receive as "exempt-interest dividends," as defined in the Code.
If such requirements are satisfied, distributions of the Short Duration Tax-
Free and Municipal Income Funds that are attributable to interest on tax-
exempt obligations and that the Funds properly designate as exempt-interest
dividends will be exempt from regular federal income tax, although all or a
portion of these distributions may be subject to the federal alternative
minimum tax and may be includable in the tax base for determining taxability
of social security or railroad retirement benefits. Persons who are
"substantial users" (or related persons to such substantial users) of
facilities financed by industrial development or certain private activity
bonds should consult their own tax advisers before purchasing shares of the
Short Duration Tax-Free and Municipal Income Funds. Interest on indebtedness
incurred or continued to purchase or carry shares of the Short Duration Tax-
Free and Municipal Income Funds is not deductible to the extent attributable
to the Funds' distributions that are exempt-interest dividends.
 
  Dividends paid by a Fund from net investment income, certain net realized
foreign exchange gains, the excess of net short-term capital gain over net
long-term capital loss and original issue discount or market discount income
will be taxable to shareholders as ordinary income, except for any exempt-
interest dividends paid by Short Duration Tax-Free and Municipal Income Funds,
as described above. Distributions out of the net capital gain (the excess of
net long-term capital gain over net short-term capital loss), if any, of a
Fund, will be taxed to shareholders as long-term capital gains, regardless of
the length of time a shareholder has held his or her shares or whether such
gain was reflected in the price paid for the shares. These tax consequences
will apply whether distributions are received in cash or reinvested in shares.
Certain distributions paid by a Fund in January of a given year may be taxable
to shareholders as if received the prior December 31. Shareholders will be
informed annually about the amount and character of distributions received
from the Funds for federal income tax purposes.
 
  Investors should consider the tax implications of buying shares immediately
prior to a distribution. Investors who purchase shares shortly before the
record date for a distribution other than a daily dividend will pay a per
share price that includes the value of the anticipated distribution and will
be taxed on any taxable distribution even though the distribution represents a
return of a portion of the purchase price.
 
  Redemptions and exchanges of shares are taxable events.
 
  Individuals and certain other classes of shareholders may be subject to 31%
backup withholding of federal income tax on distributions (other than exempt-
interest dividends), redemptions and exchanges if they fail to furnish their
correct taxpayer identification number and certain certifications required by
the Internal Revenue
 
                                      46
<PAGE>
 
Service or if they are otherwise subject to backup withholding. Individuals,
corporations and other shareholders that are not U.S. persons under the Code
are subject to different tax rules and may be subject to nonresident alien
withholding at the rate of 30% (or a lower rate provided by an applicable tax
treaty) on amounts treated as ordinary dividends from the Funds.
 
  The Core Fixed Income, Global Income and High Yield Funds may be subject to
foreign withholding or other foreign taxes on income or gain from certain
foreign securities. In general, a Fund may deduct these taxes in computing its
taxable income, if any. As an alternative, if more than 50% of the value of
the total assets of the Global Income Fund is comprised of securities of
foreign corporations at the end of its taxable year and the Fund so elects,
the Fund's shareholders will include in their gross incomes (in addition to
dividends and distributions they receive) their pro rata shares of qualified
foreign taxes paid by the Fund and may be entitled under the Code to claim
foreign tax credits or deductions with respect to such taxes.
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local
or foreign taxes on payments received from the Funds, including exempt-
interest dividends. A state income (and possibly local income and/or
intangible property) tax exemption is generally available to the extent (if
any) a Fund's distributions are derived from interest on (or, in the case of
intangible property taxes, the value of its assets is attributable to) certain
U.S. government obligations and/or tax-exempt municipal obligations issued by
or on behalf of the particular state or a political subdivision thereof,
provided in some states that certain thresholds for holdings of such
obligations and/or reporting requirements are satisfied. For a further
discussion of certain tax consequences of investing in shares of the Funds,
see "Taxation" in the Additional Statement. Shareholders are urged to consult
their own tax advisers regarding specific questions as to federal, state and
local taxes as well as to any foreign taxes.
 
 
                            ADDITIONAL INFORMATION
 
 
  As used in this Prospectus, the term "Business Day" means any day the New
York Stock Exchange is open for trading, which is Monday through Friday except
for holidays. The New York Stock Exchange is closed
on the following holidays: New Year's Day, Martin Luther King, Jr. Day,
Presidents' Day (observed), Good Friday, Memorial Day (observed), Independence
Day, Labor Day, Thanksgiving Day and Christmas Day.
 
                                      47
<PAGE>
 
 
                              ADDITIONAL SERVICES
 
  The Trust, on behalf of the Funds, has adopted a Service Plan with respect
to the Service Shares which authorizes a Fund to compensate certain
institutions ("Service Organizations") for providing account administration
and personal and account maintenance services to their customers who are
beneficial owners of such Shares. The Trust, on behalf of the Funds, enters
into agreements with Service Organizations which purchase Service Shares on
behalf of their customers ("Service Agreements"). The Service Agreements
provide for compensation to the Service Organizations in an amount up to 0.50%
(on an annualized basis) of the average daily net assets of the Service Shares
of the Fund attributable to or held in the name of the Service Organization
for its customers; provided, however, that the fee paid for personal and
account maintenance services shall not exceed 0.25% of such average daily net
assets. The services provided by the Service Organizations may include acting,
directly or through an agent, as the sole shareholder of record, maintaining
account records for customers, processing orders to purchase, redeem or
exchange Service Shares for customers, responding to inquiries from
prospective and existing shareholders and assisting customers with investment
procedures.
 
  The Trust may authorize certain Service Organizations to accept on the
Trust's behalf orders placed by their customers and, if approved by the Trust,
to designate other intermediaries to accept such orders. In these cases, a
Fund will be deemed to have received an order in proper form when the order is
accepted by the authorized Service Organization or intermediary on a Business
Day, and the order will be priced at a Fund's net asset value per share next
determined after such acceptance. The Service Organization or intermediary
will be responsible for transmitting accepted orders to the Trust within the
period agreed upon by them. A customer may contact its Service Organization to
learn whether the Service Organization is authorized to accept orders. Service
Organizations that are authorized to accept orders for the Trust may receive
payments from the Funds or Goldman Sachs that are in addition to the payments
payable by the Trust under the Service Plan.
 
  Holders of Service Shares of a Fund bear all expenses and fees paid to
Service Organizations under the Service Plan as well as any other expenses
which are directly attributable to such Shares.
 
  Service Organizations may charge other fees to their customers who are the
beneficial owners of Service Shares in connection with their customer
accounts. These fees would be in addition to any amounts received by the
Service Organization under a Service Agreement and may affect the return
earned on an investment in the Fund. The Trust, on behalf of the Funds,
accrues payments made pursuant to a Service Agreement daily. All inquiries of
beneficial owners of Service Shares should be directed to the owners' Service
Organization.
 
  For the fiscal year ended October 31, 1997, the Trust, on behalf of each
Fund, paid the Service Organizations fees at the annual rate of 0.50% of each
Fund's average daily net assets attributable to Service Shares.
 
 
                            REPORTS TO SHAREHOLDERS
 
  Recordholders of Service Shares of the Funds will receive an annual report
containing audited financial statements and a semiannual report. Each
recordholder of Service Shares will also be provided with a printed
 
                                      48
<PAGE>
 
confirmation for each transaction in its account and a monthly account
statement (quarterly in the case of Global Income Fund). A year-to-date
statement for any account will be provided to a Service Organization upon
request made to Goldman Sachs.
 
  Service Organizations will be responsible for providing services similar to
those described above to their customers who are the beneficial owners of such
Shares. For example, Service Organizations are responsible for providing each
customer exercising investment discretion with monthly statements with respect
to such customer's account in lieu of an immediate confirmation of each
transaction.
 
 
                          PURCHASE OF SERVICE SHARES
 
  Customers of Service Organizations may invest in Service Shares only through
their Service Organizations. Service Shares may be purchased on any Business
Day at the net asset value per share next determined after receipt of an order
by Goldman Sachs from a Service Organization. (See "Additional Services" for a
description of limited situations where a Service Organization or other
intermediary may be authorized to accept orders for the Funds.) No sales load
will be charged. Currently, net asset value is determined as of the close of
regular trading on the New York Stock Exchange (normally, but not always, 3:00
p.m. Chicago time, 4:00 p.m. New York time), as described under "Net Asset
Value." Purchases of Service Shares of the Funds must be settled within three
(3) Business Days of the receipt of a complete purchase order. Payment of the
proceeds of redemption of shares purchased by check may be delayed for a
period of time as described under "Redemption of Service Shares."
 
  The Service Organizations are responsible for the timely transmittal of
purchase orders to Goldman Sachs and payments to Northern, State Street or
Goldman Sachs. In order to facilitate timely transmittal, the Service
Organizations have established times by which purchase orders and payments
must be received by them.
 
PURCHASE PROCEDURES APPLICABLE TO EACH FUND OTHER THAN THE GLOBAL INCOME FUND
 
  Purchases of Service Shares by a Service Organization may be made by placing
an order with Goldman Sachs at 800-621-2550 and either wiring federal funds to
the Northern Trust Company ("Northern") as subcustodian for State Street Bank
and Trust Company ("State Street") on the next Business Day or initiating an
ACH transfer to ensure receipt by Northern on the next Business Day. Purchases
may also be made by a Service Organization by check (except that the Trust
will not accept a check drawn on a foreign bank or a third-party check) or
Federal Reserve draft made payable to Goldman Sachs Fixed Income Funds--Name
of Fund and Class of shares and should be directed to Goldman Sachs Fixed
Income Funds--Name of Fund and Class of shares c/o GSAM Shareholder Services,
4900 Sears Tower, Chicago, Illinois 60606.
 
PURCHASE PROCEDURES APPLICABLE TO THE GLOBAL INCOME FUND
 
  Purchases of Service Shares may be made by a Service Organization placing an
order with Goldman Sachs at 800-621-2550 and either wiring federal funds to
State Street or initiating an ACH transfer. Purchases may also be made by a
Service Organization by check (except that the Trust will not accept a check
drawn on a foreign bank or a third-party check) or Federal Reserve draft made
payable to Goldman Sachs Fixed Income Funds--Name of Fund and Class of shares
and should be directed to Goldman Sachs Fixed Income Funds--Name of Fund and
Class of shares c/o National Financial Data Services, Inc., P.O. Box 419711,
Kansas City, MO 64141-6711.
 
                                      49
<PAGE>
 
OTHER PURCHASE INFORMATION
 
  The Funds do not have any minimum purchase or account requirements with
respect to Service Shares. A Service Organization may, however, impose a
minimum amount for initial and subsequent investments in Service Shares, and
may establish other requirements such as a minimum account balance. A Service
Organization may effect redemptions of noncomplying accounts, and may impose a
charge for any special services rendered to its customers. Customers should
contact their Service Organizations for further information concerning such
requirements and charges.
 
  Service Shares of the Global Income Fund will be issued and dividends will
begin to be paid with respect to dividends which accrue on or after the
purchase of Service Shares. For the other Funds, the following applies:
 
    PURCHASE BY FEDERAL FUNDS WIRE OR ACH TRANSFER. If a purchase order is
  received with a specified settlement date from a Service Organization in
  proper form before the determination of net asset value that day and
  payment is made by wire transfer or ACH transfer, shares will be issued and
  dividends will begin to accrue on the purchased shares on the later of (i)
  the Business Day after receipt of the purchase order or (ii) the day of
  receipt of a federal funds wire or an ACH transfer by State Street. For
  purchases without a specified settlement date, shares will be issued and
  dividends declared with respect to such shares will begin to accrue on the
  Business Day after payment is so received.
 
    PURCHASE BY CHECK OR FEDERAL RESERVE DRAFT. If a purchase order is
  received with a specified settlement date from a Service Organization in
  proper form before the determination of net asset value that day and
  payment is made by check or Federal Reserve draft, shares will be issued
  and dividends will begin to accrue on the purchased shares on the Business
  Day after the date payment is received. For purchases without a specified
  settlement date, shares will be issued and dividends declared with respect
  to such shares will begin to accrue on the Business Day after payment is so
  received.
 
  The Investment Adviser, Distributor, and/or their affiliates also pay
additional compensation, from time to time, out of their assets and not as an
additional charge to the Funds, to selected Service Organizations and other
persons in connection with the sale of shares of the Funds and other
investment portfolios of the Trust (such as additional payments based on new
sales amounts exceeding pre-established thresholds, or the length of time
customer assets have remained in the Trust) and, subject to applicable NASD
regulations, contribute to various non-cash and cash incentive arrangements to
promote the sale of shares, as well as sponsor various educational programs,
sales contests and/or promotions in which participants may receive
reimbursement of expenses, entertainment and prizes such as travel awards,
merchandise, cash, investment research and educational information and related
support materials. This additional compensation can vary among Service
Organizations depending upon such factors as the amounts their customers have
invested (or may invest) in particular investment portfolios of the Trust, the
particular program involved, or the amount of reimbursable expenses.
Additional compensation based on sales may, but is currently not expected to,
exceed 0.50% (annualized) of the amount invested. For further information, see
the Additional Statement.
 
  The Funds reserve the right to redeem Service Shares of any Service
Organization whose account balance is less than $50 as a result of earlier
redemptions. Such redemptions will not be implemented if the value of a
recordholder's account falls below the minimum account balance solely as a
result of market conditions. A Fund will give sixty (60) days' prior written
notice to Service Organizations whose Service Shares are being redeemed to
allow them to purchase sufficient additional Service Shares to avoid such
redemption.
 
  The Funds and Goldman Sachs each reserves the right to reject any specific
purchase order (including exchanges) or to restrict purchases or exchanges by
a particular purchaser (or group of related purchasers). This
 
                                      50
<PAGE>
 
may occur, for example, when a purchaser or a group of purchasers' pattern of
frequent purchases, sales or exchanges of Service Shares of a Fund is evident,
or if purchases, sales or exchanges are, or a subsequent abrupt redemption
might be, of a size that would disrupt management of a Fund.
 
  In the sole discretion of Goldman Sachs, a Fund may accept securities
instead of cash for the purchase of shares of the Fund. Such purchases will be
permitted only if the Investment Adviser determines that any securities
acquired in this manner are consistent with the Fund's investment objectives,
restrictions and policies and are desirable investments for the Fund.
 
 
 
                              EXCHANGE PRIVILEGE
 
  Service Shares of the Funds may be exchanged by a Service Organization for
(i) Service Shares of any other mutual fund sponsored by Goldman Sachs and
designated as an eligible fund for this purpose and (ii) the corresponding
class of any Goldman Sachs Money Market Fund at the net asset value next
determined either by writing to Goldman Sachs, Attention: Goldman Sachs Fixed
Income Funds--Name of Fund and Class of shares, c/o GSAM Shareholder Services,
4900 Sears Tower, Chicago, Illinois 60606 or, if previously elected in the
Fund's Account Information Form, by telephone at 800-621-2550 (7:00 a.m. to
5:30 p.m. Chicago time). A shareholder should obtain and read the prospectus
relating to any other fund and its shares and consider its investment
objective, policies and applicable fees before making an exchange. Service
Shares acquired by telephone exchange must be registered in the same name(s)
and have the same address as Service Shares of the Fund for which the exchange
is being made.
 
  In an effort to prevent unauthorized or fraudulent exchanges by telephone,
Goldman Sachs employs reasonable procedures as set forth under "Redemption of
Service Shares" to confirm that such instructions are genuine. In times of
drastic economic or market changes, the telephone exchange privilege may be
difficult to implement. For federal income tax purposes, an exchange is
treated as a redemption of the Service Shares surrendered in the exchange, on
which an investor may be subject to tax, followed by a purchase of Service
Shares, or the corresponding class of any Goldman Sachs Money Market Funds
received in the exchange. Shareholders should consult their own tax advisers
concerning the tax consequences of an exchange. Exchanges are available only
in states where exchanges may legally be made. The exchange privilege may be
materially modified or withdrawn at any time on sixty (60) days' written
notice to recordholders of Service Shares and is subject to certain
limitations. See "Purchase of Service Shares."
 
 
                         REDEMPTION OF SERVICE SHARES
 
 
  The Funds will redeem their Service Shares upon request of a recordholder of
such Shares on any Business Day at the net asset value next determined after
receipt of a request in proper form by Goldman Sachs. (See "Additional
Services" for a description of limited situations where a Service Organization
or other intermediary may be authorized to accept requests for the Funds.) If
Service Shares to be redeemed were recently purchased by check, a Fund may
delay transmittal of redemption proceeds until such time as it has assured
itself that good funds have been collected for the purchase of such Service
Shares. This may take up to fifteen (15) days.
 
                                      51
<PAGE>
 
Redemption requests may be made by a Service Organization by writing to or
calling the Transfer Agent at the address or telephone number set forth on the
back cover page of this Prospectus. A Service Organization may request
redemptions by telephone if the optional telephone redemption privilege is
elected on the Account Information Form. It may be difficult to implement
redemptions by telephone in times of drastic economic or market changes.
 
  In an effort to prevent unauthorized or fraudulent redemption or exchange
requests by telephone, Goldman Sachs employs reasonable procedures specified
by the Trust to confirm that such instructions are genuine. Among other
things, any redemption request that requires money to go to an account or
address other than that designated on the Account Information Form must be in
writing and signed by an authorized person designated on the Account
Information Form. Any such written request is also confirmed by telephone with
both the requesting party and the designated bank account to verify
instructions. (Exchanges among accounts with different names, addresses and
social security or other taxpayer identification numbers must be in writing
and signed by an authorized person designated on the Account Information
Form.) Other procedures may be implemented from time to time concerning
telephone redemptions and exchanges. If reasonable procedures are not
implemented, the Trust may be liable for any loss due to unauthorized or
fraudulent transactions. In all other cases, neither the Funds, the Trust nor
Goldman Sachs will be responsible for the authenticity of redemption or
exchange instructions received by telephone. Service Shares of each Fund
(other than Global Income Fund) to be redeemed earn dividends declared on the
day the shares are redeemed.
 
  The Funds will arrange for the proceeds of redemptions effected by any means
to be wired to the recordholder of Service Shares or, if the recordholder
elects in writing, by check. Redemption proceeds paid by wire transfer will
normally be wired on the next Business Day in federal funds (for a total one-
day delay), but may be paid up to three (3) days after receipt of a properly
executed redemption request. Wiring of redemption proceeds may be delayed one
additional Business Day if the Federal Reserve Bank is closed on the day
redemption proceeds would ordinarily be wired. Redemption proceeds paid by
check will normally be mailed to the address of record within three (3)
Business Days of receipt of a properly executed redemption request. Once wire
transfer instructions have been given by Goldman Sachs, neither the Funds, the
Trust nor Goldman Sachs assumes any further responsibility for the performance
of intermediaries or the customer's Service Organization in the transfer
process. If a problem with such performance arises, the customer should deal
directly with such intermediaries or Service Organizations.
 
  Additional documentation regarding a redemption by any means may be required
to effect a redemption when deemed appropriate by the Transfer Agent. The
request for such redemption will not be considered to have been received in
proper form until such additional documentation has been submitted to the
Transfer Agent by the recordholder of Service Shares.
 
  Service Organizations are responsible for the timely transmittal of
redemption requests by their customers to the Transfer Agent. In order to
facilitate timely transmittal of redemption requests, Service Organizations
have established times by which redemption requests must be received by them.
Additional documentation may be required when deemed appropriate by a Service
Organization.
 
                               ----------------
 
                                      52
<PAGE>
 
 
                                   APPENDIX
 
 
                   GUIDELINES FOR CERTIFICATION OF TAXPAYER
               IDENTIFICATION NUMBER ON ACCOUNT INFORMATION FORM
 
  You are required by law to provide a Fund with your correct Taxpayer
Identification Number (TIN), regardless of whether you file tax returns.
Failure to do so may subject you to penalties. Failure to provide your correct
TIN and to sign your name in the Certification section of the Account
Information Form could result in withholding of 31% by a Fund for the federal
backup withholding tax on distributions, redemptions, exchanges and other
payments relating to your account.
 
  Any tax withheld may be credited against taxes owed on your federal income
tax return.
 
  If you do not have a TIN, you should apply for one immediately by contacting
your local office of the Social Security Administration or the Internal
Revenue Service (IRS). Backup withholding could apply to payments relating to
your account while you are awaiting receipt of a TIN.
 
  Special rules apply for certain entities. For example, for an account
established under a Uniform Gifts or Transfers to Minors Act, the TIN of the
minor should be furnished.
 
  If you have been notified by the IRS that you are subject to backup
withholding because you failed to report your interest and/or dividend income
on your tax return and you have not been notified by the IRS that such
withholding should cease, you must cross out item (2) in the Certification
section of the Account Information Form.
 
  If you are an exempt recipient, you should furnish your TIN and certify your
exemption by signing the Certification section and writing "exempt" after your
signature. Exempt recipients include: corporations, tax-exempt pension plans
and IRAs, governmental agencies, financial institutions, registered securities
and commodities dealers and others.
 
  If you are a nonresident alien or foreign entity, you must provide a
completed Form W-8 to a Fund in order to avoid backup withholding on certain
payments. Other payments to you may be subject to nonresident alien
withholding of up to 30%.
 
  For further information regarding backup and nonresident alien withholding,
see Sections 3406, 1441 and 1442 of the Internal Revenue Code and consult your
tax adviser.
 
                                      A-1
<PAGE>
 
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GOLDMAN SACHS ASSET
MANAGEMENT
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN SACHS FUNDS
MANAGEMENT, L.P.
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN SACHS ASSET
MANAGEMENT INTERNATIONAL
133 PETERBOROUGH COURT
LONDON, ENGLAND EC4A 2BB
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR
85 BROAD STREET
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
TRANSFER AGENT
4900 SEARS TOWER
CHICAGO, ILLINOIS 60606
 
STATE STREET BANK AND TRUST COMPANY
CUSTODIAN
1776 HERITAGE DRIVE
NORTH QUINCY, MASSACHUSETTS 02171
 
ARTHUR ANDERSEN LLP
INDEPENDENT PUBLIC ACCOUNTANTS
225 FRANKLIN STREET
BOSTON, MASSACHUSETTS 02110
 
TOLL FREE (IN U.S.) . . . . . . . .  800-621-2550
 
FIPROSVC
501421
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
GOLDMAN SACHS
FIXED INCOME FUNDS
 
 
- --------------------------------------------------------------------------------
 
PROSPECTUS
SERVICE SHARES
 
 
 
LOGO
Goldman 
Sachs 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
 
- --------------------------------------------------------------------------------
PROSPECTUS              GOLDMAN SACHS FIXED INCOME FUNDS
March 1, 1998, as revised   CLASS A, B AND C SHARES
September 1, 1998
 
 
GOLDMAN SACHS ADJUSTABLE RATE       GOLDMAN SACHS MUNICIPAL INCOME FUND
GOVERNMENT FUND                        
                                       Seeks a high level of current income   
  Seeks a high level of current        that is exempt from regular federal in-
  income, consistent with low          come tax, consistent with preservation 
  volatility of principal. The         of capital. The Fund invests primarily 
  Fund invests primarily in            in municipal securities.                
  adjustable rate mortgage          
  pass-through securities and       GOLDMAN SACHS CORE FIXED INCOME FUND  
  other mortgage securities
  with periodic interest rate          Seeks a total return consisting of cap-
  resets, which are issued or          ital appreciation and income that ex-
  guaranteed by the U.S.               ceeds the total return of the Lehman
  government, its agencies,            Brothers Aggregate Bond Index. The Fund
  instrumentalities or                 invests primarily in fixed-income secu-
  sponsored enterprises.               rities, including securities issued or
                                       guaranteed by the U.S. government, its
GOLDMAN SACHS SHORT DURATION           agencies, instrumentalities or spon-
GOVERNMENT FUND                        sored enterprises, corporate securi-
                                       ties, mortgage-backed securities and
  Seeks a high level of current        asset-backed securities.
  income and secondarily, in
  seeking current income, may       GOLDMAN SACHS GLOBAL INCOME FUND
  also consider the potential         
  for capital appreciation. The        Seeks a high total return, emphasizing   
  Fund invests primarily in            current income and, to a lesser extent,  
  securities issued or                 providing opportunities for capital ap-  
  guaranteed by the U.S.               preciation. The Fund invests primarily   
  government, its agencies,            in a portfolio of high quality fixed-    
  instrumentalities or                 income securities of U.S. and foreign    
  sponsored enterprises.               issuers and foreign currencies.         
 
GOLDMAN SACHS SHORT DURATION        GOLDMAN SACHS HIGH YIELD FUND    
TAX-FREE FUND                          
                                       Seeks a high level of current income   
  Seeks a high level of current        and may also consider the potential for
  income, consistent with              capital appreciation. The Fund invests 
  relatively low volatility of         primarily in fixed-income securities   
  principal, that is exempt            rated below investment grade.           
  from regular federal income
  tax. The Fund invests             
  primarily in municipal
  securities.
 
GOLDMAN SACHS GOVERNMENT
INCOME FUND                            
                                       
  Seeks a high level of current        
  income, consistent with              
  safety of principal. The Fund        
  invests primarily in
  securities, including
  mortgage-backed securities,
  issued or guaranteed by the
  U.S. government, its
  agencies, instrumentalities
  or sponsored enterprises.
 
 
  This Prospectus provides information about Goldman Sachs Trust (the "Trust")
and the Funds that a prospective investor should understand before investing.
This Prospectus should be retained for future reference. A Statement of
Additional Information (the "Additional Statement"), dated March 1, 1998, as
revised September 1, 1998, containing further information about the Trust and
the Funds which may be of interest to investors, has been filed with the
Securities and Exchange Commission ("SEC"), is incorporated herein by reference
in its entirety, and may be obtained without charge from Goldman Sachs by
calling the telephone number, or writing to one of the addresses, listed on the
back cover of this Prospectus. The SEC maintains a Web site
(http://www.sec.gov) that contains the Additional Statement and other
information regarding the Trust.
 
SHARES OF THE FUNDS ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR
ENDORSED BY, ANY BANK OR OTHER INSURED DEPOSITORY INSTITUTION, AND ARE NOT
INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD
OR ANY OTHER GOVERNMENT AGENCY. AN INVESTMENT IN A FUND INVOLVES INVESTMENT
RISKS, INCLUDING POSSIBLE LOSS OF PRINCIPAL.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.
                                                       (continued on next page)
<PAGE>
 
(cover continued)
 
  THE ADJUSTABLE RATE GOVERNMENT, SHORT DURATION GOVERNMENT AND GOVERNMENT
INCOME FUNDS' NET ASSET VALUES AND YIELDS ARE NOT GUARANTEED BY THE U.S.
GOVERNMENT OR BY ITS AGENCIES, INSTRUMENTALITIES OR SPONSORED ENTERPRISES.
 
  THE CORE FIXED INCOME, GLOBAL INCOME AND HIGH YIELD FUNDS MAY INVEST IN
SECURITIES OF FOREIGN ISSUERS AND FOREIGN CURRENCIES THAT ENTAIL CERTAIN RISKS
NOT CUSTOMARILY ASSOCIATED WITH INVESTING IN U.S. DOLLAR-DENOMINATED FIXED-
INCOME SECURITIES. IN PARTICULAR, THE SECURITIES MARKETS OF EMERGING MARKET
COUNTRIES ARE LESS LIQUID, ARE SUBJECT TO GREATER PRICE VOLATILITY, HAVE
SMALLER MARKET CAPITALIZATIONS, HAVE LESS GOVERNMENT REGULATION AND ARE NOT
SUBJECT TO AS EXTENSIVE AND FREQUENT ACCOUNTING, FINANCIAL AND OTHER REPORTING
REQUIREMENTS AS THE SECURITIES MARKETS OF MORE DEVELOPED COUNTRIES.
 
  THE HIGH YIELD FUND INVESTS PRIMARILY IN HIGH YIELD, FIXED INCOME SECURITIES
RATED BELOW INVESTMENT GRADE THAT ARE CONSIDERED SPECULATIVE AND GENERALLY
INVOLVE GREATER PRICE VOLATILITY AND GREATER RISK OF LOSS OF PRINCIPAL AND
INTEREST THAN INVESTMENTS IN HIGHER RATED FIXED INCOME SECURITIES.
 
  INVESTORS SHOULD CONSIDER THE RISKS ASSOCIATED WITH INVESTMENT IN A FUND
INVESTING IN FOREIGN AND/OR HIGH YIELD SECURITIES. THE FUNDS MAY NOT BE
SUITABLE FOR ALL INVESTORS. SEE "DESCRIPTION OF SECURITIES" AND "RISK
FACTORS."
 
  Goldman Sachs Funds Management, L.P. ("GSFM"), New York, New York, an
affiliate of Goldman, Sachs & Co. ("Goldman Sachs"), serves as investment
adviser to the Adjustable Rate Government and Short Duration Government Funds.
Goldman Sachs Asset Management ("GSAM"), New York, New York, a separate
operating division of Goldman Sachs, serves as investment adviser to the Short
Duration Tax-Free, Government Income, Municipal Income, Core Fixed Income and
High Yield Funds. Goldman Sachs Asset Management International ("GSAMI"),
London, England, an affiliate of Goldman Sachs, serves as investment adviser
to the Global Income Fund. GSAM, GSFM and GSAMI are each referred to in this
Prospectus as the "Investment Adviser." Goldman Sachs serves as each Fund's
distributor and transfer agent.
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                      PAGE
                                      ----
<S>                                   <C>
Fund Highlights......................   1
Fees and Expenses....................   8
Financial Highlights.................  12
Investment Objectives and Policies...  17
Description of Securities............  24
Risk Factors.........................  33
Investment Techniques................  36
Investment Restrictions..............  39
Portfolio Turnover...................  40
Management...........................  40
Expenses.............................  44
Reports to Shareholders..............  45
</TABLE>
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
                         <S>                                  <C>
                         How to Invest.......................  45
                         Services Available to Shareholders..  52
                         Distribution and Service Plans......  55
                         How to Sell Shares of the Funds.....  56
                         Dividends...........................  58
                         Net Asset Value.....................  59
                         Performance Information.............  59
                         Shares of the Trust.................  60
                         Taxation............................  61
                         Additional Information..............  62
                         Appendix............................ A-1
                         Account Application
</TABLE>
<PAGE>
 
 
                                FUND HIGHLIGHTS
 
   The following is intended to highlight certain information and is qualified
 in its entirety by the more detailed information contained in this
 Prospectus.
 
 WHAT IS THE GOLDMAN SACHS TRUST?
 
   The Goldman Sachs Trust is an open-end management investment company that
 offers its shares in several investment funds (mutual funds). Each Fund pools
 the monies of investors by selling its shares to the public and investing
 these monies in a portfolio of securities designed to achieve that Fund's
 stated investment objectives.
 
 WHAT ARE THE INVESTMENT OBJECTIVES AND POLICIES OF THE FUNDS?
 
   Each Fund has distinct investment objectives and policies. There can be no
 assurance that a Fund's objectives will be achieved. For a further
 description of each Fund's investment objectives and policies, see
 "Investment Objectives and Policies," "Description of Securities" and
 "Investment Techniques."
 
 WHO MANAGES THE FUNDS?
 
   Goldman Sachs Funds Management, L.P. serves as Investment Adviser to the
 Adjustable Rate Government and Short Duration Government Funds. Goldman Sachs
 Asset Management serves as Investment Adviser to the Short Duration Tax-Free,
 Core Fixed Income, Government Income, Municipal Income and High Yield Funds.
 Goldman Sachs Asset Management International serves as Investment Adviser to
 the Global Income Fund. As of July 24, 1998, the Investment Advisers,
 together with their affiliates, acted as investment adviser or distributor
 for assets in excess of $168 billion.
 
 WHO DISTRIBUTES THE FUNDS' SHARES?
 
   Goldman Sachs acts as distributor of each Fund's shares.
 
 
                                       1
<PAGE>
 
 
<TABLE>
<CAPTION>
                                                            EXPECTED
                                                           APPROXIMATE
                     INVESTMENT                           INTEREST RATE
  FUND NAME          OBJECTIVES            DURATION        SENSITIVITY    INVESTMENT SECTOR      CREDIT QUALITY
<S>             <C>                   <C>                 <C>           <C>                   <C>
ADJUSTABLE      A high level of       Target = 6-month    9-month note  At least 65% of       U.S. Government
RATE            current income,       to 1-year                         total assets in       Securities
GOVERNMENT      consistent with       U.S. Treasury                     securities issued or
FUND            low volatility        Security                          guaranteed by the
                of principal.         Maximum = 2 years                 U.S. government,
                                                                        its agencies,
                                                                        instrumentalities
                                                                        or sponsored
                                                                        enterprises
                                                                        ("U.S. Government
                                                                        Securities'')
                                                                        that are adjustable
                                                                        rate mortgage
                                                                        pass-through
                                                                        securities and
                                                                        other mortgage
                                                                        securities with
                                                                        periodic interest
                                                                        rate resets.
SHORT DURATION  A high level of       Target = 2-year     2-year bond   At least 65% of       U.S. Government
GOVERNMENT      current income,       U.S. Treasury                     total assets in       Securities
FUND            and secondarily,      Security plus                     U.S. Government
                in seeking current    or minus .5 years                 Securities
                income, may           Maximum = 3 years                 and repurchase
                also consider the                                       agreements
                potential for                                           collateralized
                capital appreciation.                                   by such securities.
SHORT DURATION  A high level of       Target = Lehman     3-year bond   At least 80% of       Minimum = BBB/Baa
TAX-FREE        current income,       Brothers                          net assets in
FUND            consistent with       3-year Municipal                  municipal securities.
                low volatility        Bond Index
                of principal,         plus or minus
                that is exempt        .5 years
                from regular          Maximum = 4 years
                federal
                income tax.
GOVERNMENT      A high level of       Target = Lehman     5-year bond   At least 65% of       U.S. Government
INCOME          current income,       Brothers Mutual                   total assets in U.S.  Securities; non-U.S.
FUND            consistent with       Fund Government/                  Government            Government
                safety of             Mortgage Index                    Securities, including Securities =
                principal.            plus or minus                     mortgage-backed       AAA/Aaa
                                      1 year                            U.S. Government
                                      Maximum =                         Securities and
                                      6 years                           repurchase
                                                                        agreements
                                                                        collateralized by
                                                                        U.S. Government
                                                                        Securities.
<CAPTION>
  FUND NAME      OTHER INVESTMENTS      BENCHMARK
<S>             <C>                 <C>
ADJUSTABLE      Fixed-rate          6-month and
RATE            mortgage            1-year U.S.
GOVERNMENT      pass-through        Treasury Security
FUND            securities
                and repurchase
                agreements
                collateralized by
                U.S. Government
                Securities.
SHORT DURATION  Mortgage pass-      2-year U.S.
GOVERNMENT      through             Treasury Security
FUND            securities and
                other securities
                representing an
                interest in or
                collateralized
                by mortgage loans.
SHORT DURATION  U.S. Government     Lehman Brothers
TAX-FREE        Securities          3-Year Municipal
FUND            and repurchase      Bond Index
                agreements
                collateralized
                by such securities.
GOVERNMENT      Non-government      Lehman Brothers
INCOME          mortgage pass-      Mutual Fund
FUND            through securities, Government/
                asset-backed        Mortgage Index
                securities and
                corporate
                fixed income
                securities.
</TABLE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                                       2
<PAGE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
 
<TABLE>
<CAPTION>
                                                       EXPECTED
                                                     APPROXIMATE
                                                       INTEREST
                  INVESTMENT                             RATE
 FUND NAME        OBJECTIVES           DURATION      SENSITIVITY    INVESTMENT SECTOR     CREDIT QUALITY   OTHER INVESTMENTS
<S>          <C>                  <C>                <C>          <C>                   <C>                <C>
MUNICIPAL    A high level of      Target = Lehman    15-year bond At least 80% of       Minimum = BBB/Baa  U.S. Government
INCOME       current income       Brothers 15-year                net assets in         Average = AA/Aa    Securities and
FUND         that is exempt       Municipal Bond                  municipal securities.                    repurchase
             from regular         Index plus                                                               agreements
             federal income       or minus 1 year                                                          collateralized by
             tax, consistent      Maximum =                                                                such securities.
             with preservation    12 years
             of capital.
CORE FIXED   Total return         Target = Lehman    5-year bond  At least 65% of       Minimum = BBB/Baa  Foreign fixed-
INCOME FUND  consisting of        Brothers                        assets in fixed-      Minimum for        income,
             capital              Aggregate Bond                  income securities,    non-dollar         municipal and
             appreciation and     Index plus or                   including             securities = AA/Aa convertible
             income that          minus 1 year                    U.S. Government                          securities,
             exceeds the total    Maximum =  6 years              Securities,                              foreign currencies
             return of the                                        corporate,                               and repurchase
             Lehman Brothers                                      mortgage-backed                          agreements
             Aggregate Bond                                       and asset-backed                         collateralized
             Index.                                               securities.                              by U.S.
                                                                                                           Government
                                                                                                           Securities.
GLOBAL       A high total return, Target = J.P.      6-year bond  Securities of U.S.    Minimum = BBB/Baa  Mortgage and asset
INCOME       emphasizing          Morgan Global                   and foreign           At least 50% =     backed securities,
FUND         current              Government                      governments and       AAA/Aaa            foreign currencies
             income, and, to      Bond Index                      corporations.                            and repurchase
             a lesser extent,     (hedged) plus                                                            agreements
             providing            or minus 2.5 years                                                       collateralized by
             opportunities        Maximum =                                                                U.S. Government
             for capital          7.5 years                                                                Securities or
             appreciation.                                                                                 certain foreign
                                                                                                           government
                                                                                                           securities.
HIGH YIELD   A high level of      Target = Lehman    6-year bond  At least 65% of       At least 65% =     Mortgage-backed
FUND         current income       Brothers High                   assets in fixed-      BB/Ba or below     and asset-backed
             and capital          Yield Bond Index                income securities                        securities, U.S.
             appreciation.        plus or minus                   rated below                              Government
                                  2.5 years                       investment grade,                        Securities,
                                  Maximum =                       including U.S.                           investment grade
                                  7.5 years                       and non-U.S. dollar                      corporate fixed-
                                                                  corporate debt,                          income securities,
                                                                  foreign government                       structured
                                                                  securities,                              securities,
                                                                  convertible                              foreign currencies
                                                                  securities                               and repurchase
                                                                  and preferred stock.                     agreements
                                                                                                           collateralized by
                                                                                                           U.S. Government
                                                                                                           Securities.
<CAPTION>
 FUND NAME      BENCHMARK
<S>          <C>
MUNICIPAL    Lehman Brothers
INCOME       15-Year
FUND         Municipal
             Bond Index
CORE FIXED   Lehman Brothers
INCOME FUND  Aggregate Bond
             Index
GLOBAL       J.P. Morgan
INCOME       Global
FUND         Government Bond
             Index (hedged)
HIGH YIELD   Lehman Brothers
FUND         High Yield
             Bond Index
</TABLE>
 
 
                                       3
<PAGE>
 
 
 WHAT ARE THE RISK FACTORS AND SPECIAL CHARACTERISTICS THAT I SHOULD CONSIDER
 BEFORE INVESTING?
 
   Each Fund's share price will fluctuate with market, economic and, with
 respect to the Core Fixed Income, Global Income and High Yield Funds,
 foreign exchange conditions, so that an investment in any of the Funds may
 be worth more or less when redeemed than when purchased. None of the Funds
 should be relied upon as a complete investment program. There can be no
 assurance that a Fund's investment objectives will be achieved. See "Risk
 Factors."
 
   Interest Rate Risk. When interest rates decline, the market value of
 fixed-income securities tends to increase. Conversely, when interest rates
 increase, the market value of fixed-income securities tends to decline.
 Volatility of a security's market value will differ depending upon the
 security's duration, the issuer and the type of instrument.
 
   Default Risk/Credit Risk. Investments in fixed-income securities are
 subject to the risk that the issuer could default on its obligations, and a
 Fund could sustain losses on such investments. A default could impact both
 interest and principal payments.
 
   Call Risk and Extension Risk. Fixed-income securities may be subject to
 both call risk and extension risk. Call risk (i.e., where the issuer
 exercises its right to pay principal on an obligation earlier than
 scheduled) causes cash flow to be returned earlier than expected. Call risk
 typically results when interest rates have declined. Under such
 circumstances, a Fund may be unable to recoup all of its initial investment
 and will also suffer from having to reinvest in lower yielding securities.
 Extension risk (i.e., where the issuer exercises its right to pay principal
 on an obligation later than scheduled) causes cash flows to be returned
 later than expected. Extension risk typically results when interest rates
 have increased. Under such circumstances a Fund will suffer from the
 inability to invest in higher yielding securities. The investment
 characteristics of Mortgage-Backed Securities (including adjustable rate
 mortgage securities) and Asset-Backed Securities differ from those of
 traditional fixed-income securities because they generally have both call
 risk (also known as prepayment risk) and extension risk.
 
   Tax Risk of Municipal Securities. Because of their tax-exempt status, the
 yields and market values of municipal securities may be more adversely
 impacted by changes in tax rates and policies than taxable fixed-income
 securities.
 
   Risks of investing in non-investment grade fixed-income securities. Non-
 investment grade fixed-income securities (commonly referred to as "junk
 bonds") are subject to greater volatility and risk of loss and are less
 liquid than securities which are perceived to be of higher credit quality.
 Such securities, also referred to as high yield securities, are considered
 to be speculative by traditional investment standards. High yield securities
 are subject to increased risk of an issuer's inability to meet principal and
 interest payments. The High Yield Fund may invest in securities which are in
 default at the time of investment. The market for non-investment grade
 securities tends to be concentrated in a limited number of market makers,
 which may affect liquidity. In addition, the market price of such securities
 tends to reflect individual corporate developments to a greater extent than
 that of higher rated securities which react primarily to the general level
 of interest rates.
 
   Foreign Risks. Investments in securities of foreign issuers and currencies
 involve risks that are different from those associated with investments in
 domestic securities. The risks associated with foreign investments
 
                                       4
<PAGE>
 
 and currencies include changes in relative currency exchange rates,
 political and economic developments, the imposition of exchange controls,
 confiscation and other governmental restrictions. In addition, the
 securities markets of foreign countries are generally less liquid and
 subject to greater price volatility. To the extent that the Core Fixed
 Income, Global Income and High Yield Funds invest in emerging markets and
 countries, these risks may be heightened.
 
   Other. A Fund's use of certain investment techniques, including
 derivatives, forward contracts, options, futures and swap transactions, will
 subject the Fund to greater risk than funds that do not employ such
 techniques.
 
   Diversified and Non-Diversified Funds. Each Fund, other than the Global
 Income Fund, is a "diversified open-end management company" as defined under
 the Investment Company Act of 1940, as amended (the "Act"). The Global
 Income Fund is a "non-diversified open-end management company" as defined
 under the Act and is, therefore, subject only to certain federal tax
 diversification requirements (to which the other Funds are also subject), in
 addition to the policies adopted by the Investment Adviser. To the extent
 that the Fund is not diversified under the Act, it will be more susceptible
 to adverse developments affecting any single issuer of portfolio securities.
 See "Investment Restrictions."
 
 WHAT IS THE MINIMUM INVESTMENT?
 
<TABLE>
<CAPTION>
                                                              MINIMUM
                                                    ----------------------------
                                                    INITIAL PURCHASE ADDITIONAL
    TYPE OF PURCHASE                                     AMOUNT      INVESTMENTS
    ----------------                                ---------------- -----------
    <S>                                             <C>              <C>
    Regular Purchases.............................       $1,000          $50
    Tax-Sheltered Retirement Plans (excluding
     SIMPLE IRAs and Education IRAs) and UGMA/UTMA
     Purchases....................................       $  250          $50
    SIMPLE IRAs and Education IRAs................       $   50          $50
    Automatic Investment Plan.....................       $   50          $50
    403(b) Plans..................................       $  200          $50
</TABLE>
 
  For further information, see "How to Invest--How to Buy Shares of the Funds"
on page 46.
 
 HOW DO I PURCHASE SHARES?
 
   You may purchase shares of the Funds through Goldman Sachs and certain
 investment dealers, including members of the National Association of
 Securities Dealers, Inc. (the "NASD") and certain other financial service
 firms that have agreements with Goldman Sachs relating to the sale of shares
 ("Authorized Dealers"). See "How to Invest" on page 45.
 
 WHAT ARE MY PURCHASE ALTERNATIVES?
 
   The Funds offer three classes of shares through this Prospectus (other
 than the Adjustable Rate Government Fund which does not currently, but may
 in the future, offer Class B or Class C shares). These shares may be
 purchased at the investor's choice, at a price equal to their next
 determined net asset value ("NAV") (i) plus an initial sales charge imposed
 at the time of purchase ("Class A shares"), (ii) with a contingent deferred
 sales charge imposed on redemptions within six years of purchase ("Class B
 shares") or (iii) without any initial or contingent deferred sales charge,
 as long as shares are held for one year or more ("Class C shares"). Except
 with respect to the Adjustable Rate Government Fund, direct purchases of $1
 
                                       5
<PAGE>
 
 million ($500,000 in the case of the Short Duration Government and Short
 Duration Tax Free Funds) or more of Class A shares will be sold without
 an initial sales charge and will be subject to a contingent deferred
 sales charge at the time of certain redemptions.
 
<TABLE>
<CAPTION>
     ADJUSTABLE RATE      MAXIMUM INITIAL                   MAXIMUM CONTINGENT
     GOVERNMENT FUND       SALES CHARGE                   DEFERRED SALES CHARGE
     ---------------      ---------------                 ---------------------
  <S>                     <C>             <C>
  Class
   A....                        1.5%                               N/A
<CAPTION>
      SHORT DURATION
    GOVERNMENT  FUND
      SHORT DURATION
      TAX-FREE FUND
    -----------------
  <S>                     <C>             <C>
  Class
   A....                        2.0%                           (See above)
  Class
   B....                        N/A                2% declining to 0% after three years
  Class
   C....                        N/A       1% if shares are redeemed within 12 months of purchase
<CAPTION>
  GOVERNMENT INCOME FUND
  MUNICIPAL INCOME FUND
  CORE FIXED INCOME FUND
    GLOBAL INCOME FUND
     HIGH YIELD FUND
  ----------------------
  <S>                     <C>             <C>
  Class
   A....                        4.5%                           (See above)
  Class
   B....                        N/A                 5% declining to 0% after six years
  Class
   C....                        N/A       1% if shares are redeemed within 12 months of purchase
</TABLE>
 
   Over time, the deferred sales charge and distribution and service fees
 attributable to Class B or Class C shares will exceed the initial sales
 charge and distribution and service fees attributable to Class A shares.
 Class B shares convert to Class A shares, which are subject to lower
 distribution and service fees, eight years after initial purchase. Class
 C shares, which are subject to the same distribution and service fees as
 Class B shares, do not convert to Class A shares and are subject to the
 higher distribution and service fees indefinitely. See "How to Invest--
 Alternative Purchase Arrangements" on page 45.
 
 HOW DO I SELL MY SHARES?
 
   You may redeem shares upon request on any Business Day, as defined
 under "Additional Information," at the net asset value next determined
 after receipt of such request in proper form, subject to any applicable
 contingent deferred sales charge. See "How to Sell Shares of the Funds."
 
 HOW DO I RECEIVE DIVIDENDS AND DISTRIBUTIONS?
 
<TABLE>
<CAPTION>
                                                INVESTMENT INCOME
                                                    DIVIDENDS
                                                ------------------ CAPITAL GAINS
     FUND                                       DECLARED    PAID   DISTRIBUTIONS
     ----                                       ------------------ -------------
  <S>                                           <C>       <C>      <C>
  Adjustable Rate Government................... Daily     Monthly    Annually
  Short Duration Government.................... Daily     Monthly    Annually
  Short Duration Tax-Free...................... Daily     Monthly    Annually
  Government Income............................ Daily     Monthly    Annually
  Municipal Income............................. Daily     Monthly    Annually
  Core Fixed Income............................ Daily     Monthly    Annually
  Global Income................................ Monthly   Monthly    Annually
  High Yield................................... Daily     Monthly    Annually
</TABLE>
 
                                       6
<PAGE>
 
 
   You may receive dividends in additional shares of the same class of the
 Fund in which you have invested or you may elect to receive dividends in
 cash, shares of the same class of other mutual funds sponsored by Goldman
 Sachs (the "Goldman Sachs Funds") or ILA Service Units of the Prime
 Obligations Portfolio or the Tax-Exempt Diversified Portfolio, if you hold
 Class A shares of a Fund, or ILA Class B or Class C Units of the Prime
 Obligations Portfolio, if you hold Class B or Class C shares of a Fund (the
 "ILA Portfolios"). For further information concerning dividends, see
 "Dividends."
 
                                       7
<PAGE>
 
 
                               FEES AND EXPENSES
 
<TABLE>
<CAPTION>
                   ADJUSTABLE RATE     SHORT DURATION                SHORT DURATION                  GOVERNMENT
                     GOVERNMENT          GOVERNMENT                     TAX-FREE                       INCOME
                        FUND                FUND                          FUND                          FUND
                   --------------- ---------------------------   ---------------------------   ---------------------------
                       CLASS A     CLASS A   CLASS B   CLASS C   CLASS A   CLASS B   CLASS C   CLASS A   CLASS B   CLASS C
                   --------------- -------   -------   -------   -------   -------   -------   -------   -------   -------
<S>                <C>             <C>       <C>       <C>       <C>       <C>       <C>       <C>       <C>       <C>
SHAREHOLDER TRANSACTION EXPENSES:
 Maximum Sales
 Charge Imposed
 on Purchases....        1.5%/1/     2.0%/1/  none      none       2.0%/1/  none      none       4.5%/1/  none      none
 Maximum Sales
 Charge Imposed
 on Reinvested
 Dividends.......       none        none      none      none      none      none      none      none      none      none
 Maximum Deferred
 Sales Charge....       none/1/     none/1/    2.0%/2/   1.0%/3/  none/1/    2.0%/2/   1.0%/3/  none/1/   5.0%/2/   1.0%/3/
 Redemption
 Fees/4/.........       none        none      none      none      none      none      none      none      none      none
 Exchange
 Fees/4/.........       none        none      none      none      none      none      none      none      none      none
ANNUAL FUND OPERATING EXPENSES:
 (as a percentage
 of average daily
 net assets)/5/
 Management Fees
 (after
 applicable
 limitations)/6/.       0.40%       0.50%     0.50%     0.50%     0.35%     0.35%     0.35%     0.54%     0.54%     0.54%
 Distribution and
 Service Fees
 (after
 applicable
 limitations)/7/.       0.25%       0.25%     0.85%     1.00%     0.25%     0.85%     1.00%     0.25%     1.00%     1.00%
 Other Expenses
 (after
 applicable
 limitations)/8/.       0.24%       0.19%     0.19%     0.19%     0.19%     0.19%     0.19%     0.19%     0.19%     0.19%
                        ----        ----      ----      ----      ----      ----      ----      ----      ----      ----
TOTAL FUND
OPERATING
EXPENSES (AFTER
FEE AND EXPENSE
LIMITATIONS)/9/..       0.89%       0.94%     1.54%     1.69%     0.79%     1.39%     1.54%     0.98%     1.73%     1.73%
                        ====        ====      ====      ====      ====      ====      ====      ====      ====      ====
<CAPTION>
                          MUNICIPAL                    CORE FIXED                      GLOBAL                
                           INCOME                        INCOME                        INCOME                
                            FUND                          FUND                          FUND                 
                   ----------------------------- ----------------------------- ----------------------------- 
                   CLASS A   CLASS B   CLASS C   CLASS A   CLASS B   CLASS C   CLASS A   CLASS B   CLASS C   
                   --------- --------- --------- --------- --------- --------- --------- --------- --------- 
<S>                <C>       <C>       <C>       <C>       <C>       <C>       <C>       <C>       <C>       
SHAREHOLDER TRANSACTION EXPENSES:                                                                            
 Maximum Sales                                                                                               
 Charge Imposed                                                                                              
 on Purchases....    4.5%/1/  none      none      4.5%/1/   none      none      4.5%/1/   none      none     
 Maximum Sales                                                                                               
 Charge Imposed                                                                                              
 on Reinvested                                                                                               
 Dividends.......   none      none      none      none      none      none      none      none      none     
 Maximum Deferred                                                                                            
 Sales Charge....   none/1/   5.0%/2/   1.0%/3/   none/1/   5.0%/2/   1.0%/3/   none/1/    5.0%/2/   1.0%/3/ 
 Redemption                                                                                                  
 Fees/4/.........   none      none      none      none      none      none      none      none      none     
 Exchange                                                                                                    
 Fees/4/.........   none      none      none      none      none      none      none      none      none     
ANNUAL FUND OPERATING EXPENSES:                                                                              
 (as a percentage                                                                                            
 of average daily                                                                                            
 net assets)/5/                                                                                              
 Management Fees                                                                                             
 (after                                                                                                      
 applicable                                                                                                  
 limitations)/6/.   0.50%     0.50%     0.50%     0.40%     0.40%     0.40%     0.65%     0.65%     0.65%    
 Distribution and                                                                                            
 Service Fees                                                                                                
 (after                                                                                                      
 applicable                                                                                                  
 limitations)/7/.   0.25%     1.00%     1.00%     0.25%     1.00%     1.00%     0.50%     1.00%     1.00%    
 Other Expenses                                                                                              
 (after                                                                                                      
 applicable                                                                                                  
 limitations)/8/.   0.19%     0.19%     0.19%     0.29%     0.29%     0.29%     0.19%     0.19%     0.19%    
                   --------- --------- --------- --------- --------- --------- --------- --------- --------- 
TOTAL FUND                                                                                                   
OPERATING                                                                                                    
EXPENSES (AFTER                                                                                              
FEE AND EXPENSE                                                                                              
LIMITATIONS)/9/..   0.94%     1.69%     1.69%     0.94%     1.69%     1.69%     1.34%     1.84%     1.84%    
                   ========= ========= ========= ========= ========= ========= ========= ========= ========= 

<CAPTION>
                            HIGH
                            YIELD
                            FUND
                   -----------------------------
                   CLASS A   CLASS B   CLASS C
                   --------- --------- ---------
<S>                <C>       <C>       <C>
SHAREHOLDER TRANSACTION EXPENSES:
 Maximum Sales
 Charge Imposed
 on Purchases....    4.5%/1/  none      none
 Maximum Sales
 Charge Imposed
 on Reinvested
 Dividends.......   none      none      none
 Maximum Deferred
 Sales Charge....   none/1/    5.0%/2/   1.0%/3/
 Redemption
 Fees/4/.........   none      none      none
 Exchange
 Fees/4/.........   none      none      none
ANNUAL FUND OPERATING EXPENSES:
 (as a percentage
 of average daily
 net assets)/5/
 Management Fees
 (after
 applicable
 limitations)/6/.   0.70%     0.70%     0.70%
 Distribution and
 Service Fees
 (after
 applicable
 limitations)/7/.   0.25%     1.00%     1.00%
 Other Expenses
 (after
 applicable
 limitations)/8/.   0.21%     0.21%     0.21%
                   --------- --------- ---------
TOTAL FUND
OPERATING
EXPENSES (AFTER
FEE AND EXPENSE
LIMITATIONS)/9/..   1.16%     1.91%     1.91%
                   ========= ========= =========
</TABLE>
- ----
/1/ As a percentage of the offering price. No sales charge is imposed on
    purchases of Class A shares by certain classes of investors. Except with
    respect to direct purchases of the Adjustable Rate Government Fund, a
    contingent deferred sales charge of 1.00% is imposed on certain
    redemptions (within 18 months of purchase) of Class A shares sold without
    an initial sales charge as part of an investment of $1 million ($500,000
    in the case of Short Duration Government and Short Duration Tax Free
    Funds) or more. See "How to Invest--Offering Price."
 
/2/ With the exception of the Short Duration Government Fund and the Short
    Duration Tax-Free Fund, a contingent deferred sales charge is imposed upon
    shares redeemed within six years of purchase at a rate of 5% in the first
    year, declining to 1% in the sixth year, and eliminated thereafter. With
    respect to Short Duration Government Fund and Short Duration Tax-Free
    Fund, a contingent deferred sales charge is imposed on shares redeemed
    within three years of purchase at a rate of 2.0% in the first year,
    declining to 1% in the third year, and eliminated thereafter. See "How to
    Invest--Offering Price--Class B Shares."
 
/3/ A contingent deferred sales charge of 1.00% is imposed on shares redeemed
    within 12 months of purchase. See "How to Invest--Offering Price--Class C
    Shares."
 
/4/ A transaction fee of $7.50 may be charged for redemption proceeds paid by
    wire. In addition to free reinvestments of dividends and distributions in
    shares of other Goldman Sachs Funds or units of the ILA Portfolios and
    free automatic exchanges pursuant to the Automatic Exchange Program, six
    free exchanges are permitted in each twelve month period. A fee of $12.50
    may be charged for each subsequent exchange during such period. See "How
    to Invest--Exchange Privilege."
 
/5/ The Funds' annual operating expenses have been restated to reflect fees
    and expenses in effect as of September 1, 1998.
 
/6/ The Investment Adviser has voluntarily agreed that a portion of the
    management fee would not be imposed on the Short Duration Tax-Free,
    Government Income, Municipal Income and Global Income Funds equal to
    0.05%, 0.11%, 0.05% and 0.25%, respectively. Without such limitations,
    management fees would be 0.40%, 0.65%, 0.55% and 0.90% of each Fund's
    average daily net assets, respectively.
 
                                       8
<PAGE>
 
/7/ Goldman Sachs has voluntarily agreed not to impose .15% of the
    distribution and service fee attributable to Class B shares of the Short
    Duration Government and Short Duration Tax-Free Funds. Distribution and
    service fees for such Class B shares would otherwise be payable at the
    rate of 1.00% of average daily net assets.
/8/ The Investment Adviser has voluntarily agreed to reduce or limit certain
    other expenses (excluding management, distribution and service fees,
    transfer agency fees (equal to 0.19% of the average daily net assets of
    each Fund's Class A, B and C Shares), taxes, interest and brokerage fees
    and litigation, indemnification and other extraordinary expenses) to the
    extent such expenses exceed 0.05%, 0.00%, 0.00%, 0.00%, 0.00%, 0.10%,
    0.00% and 0.02% of the average daily net assets of the Adjustable Rate
    Government, Short Duration Government, Short Duration Tax-Free, Government
    Income, Municipal Income, Core Fixed Income, Global Income and High Yield
    Funds, respectively.
/9/ Without the limitations described above, "Other Expenses" and "Total
    Operating Expenses" of the Funds would be as set forth below:
<TABLE>
<CAPTION>
                                                                        TOTAL
                                                              OTHER   OPERATING
                                                             EXPENSES EXPENSES
                                                             -------- ---------
<S>                                                          <C>      <C>
Adjustable Rate Government
  Class A...................................................   0.27%    0.92%
Short Duration Government
  Class A...................................................   0.41%    1.16%
  Class B...................................................   0.41%    1.91%
  Class C...................................................   0.41%    1.91%
Short Duration Tax-Free
  Class A...................................................   0.78%    1.43%
  Class B...................................................   0.78%    2.18%
  Class C...................................................   0.78%    2.18%
Government Income
  Class A...................................................   0.56%    1.46%
  Class B...................................................   0.56%    2.21%
  Class C...................................................   0.56%    2.21%
Municipal Income
  Class A...................................................   0.50%    1.30%
  Class B...................................................   0.50%    2.05%
  Class C...................................................   0.50%    2.05%
Core Fixed Income
  Class A...................................................   0.49%    1.14%
  Class B...................................................   0.49%    1.89%
  Class C...................................................   0.49%    1.89%
Global Income
  Class A...................................................   0.33%    1.73%
  Class B...................................................   0.33%    2.23%
  Class C...................................................   0.33%    2.23%
High Yield
  Class A...................................................   0.52%    1.47%
  Class B...................................................   0.52%    2.22%
  Class C...................................................   0.52%    2.22%
</TABLE>
 
 
                                       9
<PAGE>
 
EXAMPLE
 
  You would pay the following expenses on a hypothetical $1,000 investment
(including the maximum sales charge) assuming (i) a 5% annual return and (ii)
redemption at the end of each time period.
 
<TABLE>
<CAPTION>
    FUND                                        1 YEAR 3 YEARS 5 YEARS 10 YEARS
    ----                                        ------ ------- ------- --------
<S>                                             <C>    <C>     <C>     <C>
Adjustable Rate Government Fund
   Class A Shares..............................  $24     $43     $64     $123
Short Duration Government Fund
  Class A Shares...............................   29      49      71      133
  Class B Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   36      59      84      167
   --Assuming no redemption....................   16      49      84      167
  Class C Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   27      53      92      200
   --Assuming no redemption....................   17      53      92      200
Short Duration Tax-Free Fund
  Class A Shares...............................   28      45      63      116
  Class B Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   34      54      76      150
   --Assuming no redemption....................   14      44      76      150
  Class C Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   26      49      84      183
   --Assuming no redemption....................   16      49      84      183
Government Income Fund
  Class A Shares...............................   55      75      97      160
  Class B Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   68      84     114      184
   --Assuming no redemption....................   18      54      94      184
  Class C Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   28      54      94      204
   --Assuming no redemption....................   18      54      94      204
Municipal Income Fund
  Class A Shares...............................   54      74      95      155
  Class B Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   67      83     112      180
   --Assuming no redemption....................   17      53      92      180
  Class C Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   27      53      92      200
   --Assuming no redemption....................   17      53      92      200
Core Fixed Income Fund
  Class A Shares...............................   54      74      95      155
  Class B Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   67      83     112      180
   --Assuming no redemption....................   17      53      92      180
  Class C Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   27      53      92      200
   --Assuming no redemption....................   17      53      92      200
Global Income Fund
  Class A Shares...............................   58      86     115      199
  Class B Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   69      88     120      203
   --Assuming no redemption....................   19      58     100      203
  Class C Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   29      58     100      216
   --Assuming no redemption....................   19      58     100      216
High Yield Fund
  Class A Shares...............................   56      80     106      180
  Class B Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   69      90     123      204
   --Assuming no redemption....................   19      60     103      204
  Class C Shares
   --Assuming complete redemption at end of pe-
    riod.......................................   29      60     103      223
   --Assuming no redemption....................   19      60     103      223
</TABLE>
 
                                       10
<PAGE>
 
  The hypothetical example assumes that a contingent deferred sales charge
will not apply to redemptions of Class A shares within the first 18 months.
Class B shares convert to Class A shares eight years after purchase;
therefore, Class A expenses are used in the hypothetical example after year
eight.
 
  The Investment Adviser and Goldman Sachs may modify or discontinue any of
the limitations set forth above in the future at their discretion. The
information with respect to the Adjustable Rate Government Fund set forth in
the foregoing table and hypothetical example relates only to its Class A
shares (the Fund does not currently offer Class B or Class C shares); such
information with respect to the other Funds relates only to Class A, B and C
shares. Each Fund also offers Institutional and Service shares. The Adjustable
Rate Government, Short Duration Government, Short Duration Tax-Free and Core
Fixed Income Funds, but not the other Funds, also offer Administration Shares.
Institutional, Administration and Service Shares are subject to different fees
and expenses (which affect performance), have different minimum investment
requirements and are entitled to different services than Class A, Class B and
Class C shares. Information regarding Institutional, Administration and
Service Shares may be obtained from your sales representative or from Goldman
Sachs by calling the number on the back cover of this Prospectus. Because of
the Distribution and Service Plans, long-term shareholders may pay more than
the economic equivalent of the maximum front-end sales charges permitted by
the NASD's rules regarding investment companies.
 
  In addition to the compensation itemized above, certain institutions that
sell Fund shares and/or their salespersons may receive other compensation for
the sale and distribution of Class A, Class B and Class C shares of the Funds
or for services to their customers' accounts and/or the Funds. For additional
information regarding such compensation, see "Management" and "Services
Available to Shareholders" in this Prospectus and "Other Information Regarding
Purchases, Redemptions, Exchanges and Dividends" in the Additional Statement.
 
  The purpose of the foregoing table is to assist investors in understanding
the various fees and expenses of a Fund that an investor will bear directly or
indirectly. The information on the fees and expenses included in the table and
the hypothetical example above are based on each Fund's fees and expenses
(actual or estimated) and should not be considered as representative of past
or future expenses. Actual fees and expenses may be greater or less than those
indicated. Moreover, while the example assumes a 5% annual return, a Fund's
actual performance will vary and may result in an actual return greater or
less than 5%. See "Management--Investment Advisers."
 
                                      11
<PAGE>
 
 
                             FINANCIAL HIGHLIGHTS
 
         SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD
 
  The following data have been audited by Arthur Andersen LLP, independent
public accountants, as indicated in their report incorporated by reference
into the Additional Statement from the Annual Report to shareholders of the
Funds for the year ended October 31, 1997 (the "Annual Report"). This
information should be read in conjunction with the financial statements and
related notes incorporated by reference and attached to the Additional
Statement. The Annual Report also contains performance information and is
available upon request and without charge by calling the telephone number or
writing to one of the addresses on the back cover of this Prospectus.
<TABLE>
<CAPTION>
                            INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                            -------------------------------------------------
                                                          NET
                                       NET REALIZED    REALIZED
                                           AND            AND
                                        UNREALIZED    UNREALIZED
                                       GAIN (LOSS)    GAIN (LOSS)
                                            ON        ON FOREIGN     TOTAL
                  NET ASSET   NET      INVESTMENT,     CURRENCY     INCOME
                  VALUE AT  INVEST-     OPTION AND      RELATED   (LOSS) FROM
                  BEGINNING  MENT        FUTURES        TRANS-    INVESTMENT
                  OF PERIOD INCOME     TRANSACTIONS     ACTIONS   OPERATIONS
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------
<S>               <C>       <C>        <C>            <C>         <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------
1997-Institu-
tional Shares...    $9.83   $0.5914(a)   $0.0494(a)       --        $0.6408
1997-Administra-
tion Shares.....     9.83    0.5665(a)    0.0497(a)       --         0.6162
1997-Service
Shares(m).......     9.84    0.3298(a)    0.0400(a)       --         0.3698
1997-Class A
Shares..........     9.83    0.5662(a)    0.0500(a)       --         0.6162
1996-Institu-
tional Shares...     9.77    0.5759(a)    0.0772(a)       --         0.6531
1996-Administra-
tion Shares.....     9.77    0.5489(a)    0.0797(a)       --         0.6286
1996-Class A
Shares..........     9.77    0.5481(a)    0.0806(a)       --         0.6287
1995-Institu-
tional Shares...     9.74    0.5630(a)    0.0717(a)       --         0.6347
1995-Administra-
tion Shares.....     9.74    0.5366(a)    0.0737(a)       --         0.6103
1995-Class A
Shares(c).......     9.79    0.2721(a)   (0.0090)(a)      --         0.2631
1994-Institu-
tional Shares...    10.00    0.4341(a)   (0.2455)(a)      --         0.1886
1994-Administra-
tion Shares.....    10.00    0.4211(a)   (0.2572)(a)      --         0.1639
1993-Institu-
tional Shares...    10.04    0.4397(a)   (0.0376)(a)      --         0.4021
1993-Administra-
tion Shares(e)..    10.02    0.2146(a)   (0.0173)(a)      --         0.1973
1992-Institu-
tional Shares...    10.03    0.5599(a)   (0.0029)(a)      --         0.5570
FOR THE PERIOD JULY 17, 1991(G) THROUGH OCTOBER 31,
- ---------------------
1991-Institu-
tional Shares...    10.00    0.1531(a)    0.0322(a)       --         0.1853

<CAPTION>
                                      DISTRIBUTIONS TO SHAREHOLDERS                                                    
                  ---------------------------------------------------------------------                                
                                                      IN EXCESS                                                        
                               FROM NET                 OF NET                                                         
                               REALIZED                REALIZED                            NET                         
                               GAIN ON                 GAIN ON                           INCREASE                      
                             INVESTMENT,  IN EXCESS  INVESTMENT,   FROM       TOTAL     (DECREASE) NET ASSET           
                   FROM NET   OPTION AND    OF NET    OPTION AND   PAID   DISTRIBUTIONS   IN NET   VALUE AT            
                  INVESTMENT   FUTURES    INVESTMENT   FUTURES      IN         TO         ASSET     END OF     TOTAL   
                    INCOME   TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL SHAREHOLDERS    VALUE     PERIOD   RETURN(K) 
- -----------------------------------------------------------------------------------------------------------------------
                                               ADJUSTABLE RATE GOVERNMENT FUND                                         
- -----------------------------------------------------------------------------------------------------------------------
<S>               <C>        <C>          <C>        <C>          <C>     <C>           <C>        <C>       <C>       
FOR THE YEARS ENDED OCTOBER 31,                                                                                        
- -------------                                                                                                          
1997-Institu-                                                                                                          
tional Shares...   $(0.5908)      --          --          --         --     $(0.5908)    $0.0500     $9.88     6.70%   
1997-Administra-                                                                                                       
tion Shares.....    (0.5662)      --          --          --         --      (0.5662)     0.0500      9.88     6.43    
1997-Service                                                                                                           
Shares(m).......    (0.3298)      --          --          --         --      (0.3298)     0.0400      9.88     3.81(f) 
1997-Class A                                                                                                           
Shares..........    (0.5662)      --          --          --         --      (0.5662)     0.0500      9.88     6.43    
1996-Institu-                                                                                                          
tional Shares...    (0.5725)      --       (0.0206)       --        --       (0.5931)     0.0600      9.83     6.86    
1996-Administra-                                                                                                       
tion Shares.....    (0.5489)      --       (0.0198)       --        --       (0.5687)     0.0600      9.83     6.60    
1996-Class A                                                                                                           
Shares..........    (0.5489)      --       (0.0198)       --        --       (0.5687)     0.0600      9.83     6.60    
1995-Institu-                                                                                                          
tional Shares...    (0.5759)      --       (0.0287)       --        --       (0.6046)     0.0301      9.77     6.75    
1995-Administra-                                                                                                       
tion Shares.....    (0.5528)      --       (0.0275)       --        --       (0.5803)     0.0300      9.77     6.48    
1995-Class A                                                                                                           
Shares(c).......    (0.2697)      --       (0.0134)       --        --       (0.2831)    (0.0200)     9.77     2.74(f) 
1994-Institu-                                                                                                          
tional Shares...    (0.4486)      --          --          --        --       (0.4486)    (0.2600)     9.74     1.88    
1994-Administra-                                                                                                       
tion Shares.....    (0.4239)      --          --          --        --       (0.4239)    (0.2600)     9.74     1.63    
1993-Institu-                                                                                                          
tional Shares...    (0.4397)      --       (0.0024)       --        --       (0.4421)    (0.0400)    10.00     4.13    
1993-Administra-                                                                                                       
tion Shares(e)..    (0.2146)      --       (0.0027)       --        --       (0.2173)    (0.0200)    10.00     2.01(f) 
1992-Institu-                                                                                                          
tional Shares...    (0.5470)      --          --          --        --       (0.5470)     0.0100     10.04     6.12    
FOR THE PERIOD JULY 17, 1991(G) THROUGH OCTOBER 31,                                                                    
- ---------------------                                                                                                  
1991-Institu-                                                                                                          
tional Shares...    (0.1553)      --          --          --        --       (0.1553)     0.0300     10.03     2.14(f) 

<CAPTION>
                                                      RATIOS ASSUMING
                                                       NO VOLUNTARY
                                                     WAIVER OF FEES OR
                                                          EXPENSE
                                                        LIMITATIONS
                                                    --------------------
                  RATIO OF
                    NET                                        RATIO OF
                 INVESTMENT                         RATIO OF     NET
                   INCOME                           EXPENSES  INVESTMENT
                     TO                  NET ASSETS    TO       INCOME
                  AVERAGE    PORTFOLIO   AT END OF  AVERAGE       TO
                    NET      TURNOVER      PERIOD     NET      AVERAGE
                   ASSETS     RATE(D)    (IN 000S)   ASSETS   NET ASSETS
- ------------------------------------------------------------------------
                              ADJUSTABLE RATE GOVERNMENT FUND                                       
- ------------------------------------------------------------------------
<S>               <C>         <C>         <C>        <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------
1997-Institu-
tional Shares...   5.99%       46.58%    $ 463,511    0.52%      5.96%
1997-Administra-  
tion Shares.....    5.73       46.58         2,793    0.77       5.70
1997-Service      
Shares(m).......    5.64(b)    46.58(f)        346    1.08(b)    5.61(b)
1997-Class A      
Shares..........    5.60       46.58        43,393    1.02       5.32
1996-Institu-     
tional Shares...    5.85       52.36       613,149    0.51       5.79
1996-Administra-  
tion Shares.....    5.59       52.36         3,792    0.76       5.53
1996-Class A      
Shares..........    5.59       52.36        10,728    1.01       5.28
1995-Institu-     
tional Shares...    5.77       24.12       657,358    0.53       5.70
1995-Administra-  
tion Shares.....    5.50       24.12         3,572    0.78       5.43
1995-Class A      
Shares(c).......    5.87(b)    24.12(f)     15,203    1.01(b)    5.55(b)
1994-Institu-     
tional Shares...    4.38       37.81       942,523    0.49       4.35
1994-Administra-  
tion Shares.....    4.27       37.81         6,960    0.74       4.24
1993-Institu-     
tional Shares...    4.36      103.74     2,760,871    0.48       4.33
1993-Administra-  
tion Shares(e)..    3.81(b)   103.74(f)      5,326    0.73(b)    3.78(b)
1992-Institu-     
tional Shares...    5.61      286.40     2,145,064    0.55       5.48
FOR THE PERIOD JULY 17, 1991(G) THROUGH OCTOBER 31,
- ---------------------
1991-Institu-
tional Shares...    7.31(b)   145.67(f)    239,642    1.02(b)    6.49(b)
</TABLE>
 
 
                                       12
<PAGE>
 
<TABLE>
<CAPTION>
                                INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                              ----------------------------------------------------
                                           NET REALIZED       NET
                                               AND          REALIZED
                                            UNREALIZED        AND
                                           GAIN (LOSS)     UNREALIZED
                                                ON        GAIN (LOSS)     TOTAL
                    NET ASSET              INVESTMENT,     ON FOREIGN    INCOME
                    VALUE AT     NET        OPTION AND      CURRENCY   (LOSS) FROM  FROM NET
                    BEGINNING INVESTMENT     FUTURES        RELATED    INVESTMENT  INVESTMENT
                    OF PERIOD   INCOME     TRANSACTIONS   TRANSACTIONS OPERATIONS    INCOME
                    --------- ----------   ------------   ------------ ----------- ----------
- ---------------------------------------------------------------------------------------------
<S>                 <C>       <C>          <C>            <C>          <C>         <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Institu-
 tional Shares..     $ 9.83    $0.6412(a)    $0.0300(a)          --      $0.6712    $(0.6412)
1997-Administra-
 tion Shares....       9.85     0.6183(a)     0.0400(a)          --       0.6583     (0.6183)
1997-Service
 Shares.........       9.82     0.5904(a)     0.0401(a)          --       0.6305     (0.5904)
1997-Class A
 Shares(o)......       9.78     0.3121(a)     0.0883(a)          --       0.4004     (0.3004)
1997-Class B
 Shares(o)......       9.75     0.2787(a)     0.1011(a)          --       0.3798     (0.2698)
1997-Class C
 Shares (p).....       9.83     0.1185(a)     0.0225(a)          --       0.1410     (0.1110)
1996-Institutional
 Shares ........       9.82     0.6290(a)     0.0136 (a)         --       0.6426     (0.6326)
1996-Administra-
 tion
 Shares(h)......       9.86     0.3837(a)     0.0003 (a)         --       0.3840     (0.3940)
1996-Service
 Shares(i)......       9.72     0.3134(a)     0.1018 (a)         --       0.4152     (0.3152)
1995-Institu-
 tional Shares..       9.64     0.6652(a)     0.1666 (a)         --       0.8318     (0.6518)
1995-Administra-
 tion Shares....       9.64     0.2384(a)    (0.0433)(a)         --       0.1951     (0.2051)
1994-Institu-
 tional Shares..      10.14     0.5628(a)    (0.4592)(a)         --       0.1036     (0.5598)
1994-Administra-
 tion Shares....      10.14     0.5329(a)    (0.4539)(a)         --       0.0790     (0.5352)
1993-Institu-
 tional Shares..      10.16     0.5627(a)    (0.0135)(a)         --       0.5492     (0.5627)
1993-Administra-
 tion
 Shares(e)......      10.23     0.2725(a)    (0.0900)(a)         --       0.1825     (0.2725)
1992-Institu-
 tional Shares..      10.22     0.6703(a)    (0.0600)(a)         --       0.6103     (0.6703)
1991-Institu-
 tional Shares..      10.00     0.8020(a)     0.2200 (a)         --       1.0220     (0.8020)
1990-Institu-
 tional Shares..      10.07     0.8300(a)    (0.0700)(a)         --       0.7600     (0.8300)
1989-Institu-
 tional Shares..      10.10     0.8800(a)        --              --       0.8800     (0.8800)
FOR THE PERIOD AUGUST 15, 1988(G) THROUGH OCTOBER 31,
- -----------------------------------------------------
1988-Institu-
 tional Shares..      10.00     0.1800(a)     0.1000 (a)         --       0.2800     (0.1800)

<CAPTION>
                             DISTRIBUTIONS TO SHAREHOLDERS                                                                  
                    -----------------------------------------------------------                                             
                                             IN EXCESS                                                                      
                      FROM NET                 OF NET                                                                       
                      REALIZED                REALIZED                             NET                            RATIO OF  
                      GAIN ON                 GAIN ON                            INCREASE                           NET     
                    INVESTMENT,  IN EXCESS  INVESTMENT,    FROM       TOTAL     (DECREASE) NET ASSET              EXPENSES  
                     OPTION AND    OF NET    OPTION AND    PAID   DISTRIBUTIONS   IN NET   VALUE AT                  TO     
                      FUTURES    INVESTMENT   FUTURES       IN         TO         ASSET     END OF      TOTAL     AVERAGE   
                    TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL  SHAREHOLDERS    VALUE     PERIOD    RETURN(K)  NET ASSETS 
                    ------------ ---------- ------------ -------- ------------- ---------- ---------- ---------- ---------- 
                                                      SHORT DURATION GOVERNMENT FUND 
- ----------------------------------------------------------------------------------------------------------------------------
<S>                 <C>          <C>        <C>          <C>      <C>           <C>        <C>        <C>        <C>        
FOR THE YEARS ENDED OCTOBER 31,                                                                                             
- -------------------------------                                                                                             
1997-Institu-                                                                                                               
 tional Shares..           --          --          --         --    $(0.6412)    $0.0300     $9.86       7.07%      0.45%   
1997-Administra-                                                                                                            
 tion Shares....           --          --          --         --     (0.6183)     0.0400      9.89       6.91       0.70    
1997-Service                                                                                                                
 Shares.........           --          --          --         --     (0.5904)     0.0401      9.86       6.63       0.95    
1997-Class A                                                                                                                
 Shares(o)......           --          --          --         --     (0.3004)     0.1000      9.88       4.14(f)    0.70(b) 
1997-Class B                                                                                                                
 Shares(o)......           --          --          --         --     (0.2698)     0.1100      9.86       3.94(f)    1.30(b) 
1997-Class C                                                                                                                
 Shares (p).....           --          --          --         --     (0.1110)     0.0300      9.86       1.44(f)    1.45(b) 
1996-Institutional                                                                                                          
 Shares ........           --          --          --         --     (0.6326)     0.0100      9.83       6.75       0.45    
1996-Administra-                                                                                                            
 tion                                                                                                                       
 Shares(h)......           --          --          --         --     (0.3940)    (0.0100)     9.85       4.00(f)    0.70(b) 
1996-Service                                                                                                                
 Shares(i)......           --          --          --         --     (0.3152)     0.1000      9.82       4.35(f)    0.95(b) 
1995-Institu-                                                                                                               
 tional Shares..           --          --          --         --     (0.6518)     0.1800      9.82       8.97       0.45    
1995-Administra-                                                                                                            
 tion Shares....           --          --          --         --     (0.2051)    (0.0100)     9.63(h)    2.10       0.70(b) 
1994-Institu-                                                                                                               
 tional Shares..      (0.0438)         --          --         --     (0.6036)    (0.5000)     9.64       0.99       0.45    
1994-Administra-                                                                                                            
 tion Shares....      (0.0438)         --          --         --     (0.5790)    (0.5000)     9.64       0.73       0.70    
1993-Institu-                                                                                                               
 tional Shares..           --     (0.0065)         --         --     (0.5692)    (0.0200)    10.14       5.55       0.45    
1993-Administra-                                                                                                            
 tion                                                                                                                       
 Shares(e)......           --          --          --         --     (0.2725)    (0.0900)    10.14       1.74(f)    0.70(b) 
1992-Institu-                                                                                                               
 tional Shares..           --          --          --         --     (0.6703)    (0.0600)    10.16       6.24       0.45    
1991-Institu-                                                                                                               
 tional Shares..           --          --          --         --     (0.8020)     0.2200     10.22      10.93       0.45    
1990-Institu-                                                                                                               
 tional Shares..           --          --          --         --     (0.8300)    (0.0700)    10.00       8.23       0.45    
1989-Institu-                                                                                                               
 tional Shares..           --          --          --    (0.0300)    (0.9100)    (0.0300)    10.07       9.08       0.46    
FOR THE PERIOD AUGUST 15, 1988(G) THROUGH OCTOBER 31,                                                                       
- -----------------------------------------------------                                                                       
1988-Institu-                                                                                                               
 tional Shares..           --          --          --         --    (0.1800)      0.1000     10.10       3.30(f)    0.55(b) 

<CAPTION>
                                                      RATIOS ASSUMING NO
                                                      VOLUNTARY WAIVER OF
                                                        FEES OR EXPENSE
                                                          LIMITATIONS
                                                      --------------------
                    
                     RATIO OF                                    RATIO OF
                       NET                    NET     RATIO OF     NET
                    INVESTMENT               ASSETS   EXPENSES  INVESTMENT
                      INCOME                 AT END      TO       INCOME
                        TO     PORTFOLIO       OF     AVERAGE       TO
                     AVERAGE   TURNOVER      PERIOD     NET      AVERAGE
                    NET ASSETS  RATE(D)    (IN 000'S)  ASSETS   NET ASSETS
                    ---------- ----------- ---------- --------- ----------
                                 SHORT DURATION GOVERNMENT FUND
- --------------------------------------------------------------------------
<S>                 <C>          <C>        <C>          <C>      <C>     
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Institu-
 tional Shares..       6.43%    102.58%     $103,729    0.82%      6.06%     
1997-Administra-                                                             
 tion Shares....       6.19     102.58         1,060    1.07       5.82      
1997-Service                                                                 
 Shares.........       5.92     102.58         3,337    1.32       5.55      
1997-Class A                                                                 
 Shares(o)......       6.05(b)  102.58(f)      9,491    1.32(b)    5.43(b)   
1997-Class B                                                                 
 Shares(o)......       5.52(b)  102.58(f)        747    1.82(b)    5.00(b)   
1997-Class C                                                                 
 Shares (p).....       5.52(b)  102.58(f)        190    1.82(b)    5.15(b)   
1996-Institutional                                                           
 Shares ........       6.44     115.45        99,944    0.71       6.18      
1996-Administra-                                                             
 tion                                                                        
 Shares(h)......       5.97(b)  115.45           252    0.96(b)    5.71(b)   
1996-Service                                                                 
 Shares(i)......       6.05(b)  115.45         1,822    1.21(b)    5.79(b)   
1995-Institu-                                                                
 tional Shares..       6.87     292.56       103,760    0.72       6.60      
1995-Administra-                                                             
 tion Shares....       7.91(b)  292.56           --     0.90(b)    7.71(b)   
1994-Institu-                                                                
 tional Shares..       5.69     289.79       193,095    0.59       5.55     
1994-Administra-                                                             
 tion Shares....       5.38     289.79           730    0.84       5.24     
1993-Institu-                                                                
 tional Shares..       5.46     411.66       359,708    0.64       5.31      
1993-Administra-                                                             
 tion                                                                        
 Shares(e)......       4.84(b)  411.66        16,490    0.80(b)    4.74(b)   
1992-Institu-                                                                
 tional Shares..       6.60     216.07       277,927    0.69       6.36      
1991-Institu-                                                                
 tional Shares..       8.25     155.44       158,848    0.79       7.91      
1990-Institu-                                                                
 tional Shares..       8.62     173.21        68,995    0.95       8.12      
1989-Institu-                                                                
 tional Shares..       8.71     137.37        31,015    1.39       7.78       
FOR THE PERIOD AUGUST 15, 1988(G) THROUGH OCTOBER 31,
- -----------------------------------------------------
1988-Institu-
 tional Shares..       8.55(b)  167.00(f)     39,052    1.42(b)    7.68(b)
</TABLE>
 
                                       13
<PAGE>
 
<TABLE>
<CAPTION>
                              INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                            ---------------------------------------------------
                                         NET REALIZED
                                             AND        NET REALIZED
                                          UNREALIZED        AND
                                         GAIN (LOSS)     UNREALIZED    TOTAL
                                              ON        GAIN (LOSS)    INCOME
                  NET ASSET              INVESTMENT,     ON FOREIGN    (LOSS)
                  VALUE AT     NET        OPTION AND      CURRENCY      FROM
                  BEGINNING INVESTMENT     FUTURES        RELATED    INVESTMENT
                  OF PERIOD   INCOME     TRANSACTIONS   TRANSACTIONS OPERATIONS
                  --------- ----------   ------------   ------------ ----------
                                      SHORT DURATION TAX-FREE FUND
- -------------------------------------------------------------------------------
<S>               <C>       <C>          <C>            <C>          <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Institu-
tional Shares...   $ 9.96    $0.4181(a)    $ 0.1091(a)      --        $ 0.5272
1997-Administra-
tion Shares.....     9.96     0.3924(a)      0.1100(a)      --          0.5024
1997-Service
Shares..........     9.97     0.3675(a)      0.1000(a)      --          0.4675
1997-Class A
Shares(o).......     9.94     0.1950(a)      0.1400(a)      --          0.3350
1997-Class B
Shares(o).......     9.94     0.1663(a)      0.1368(a)      --          0.3031
1997-Class C
Shares(p).......    10.04     0.0670(a)      0.0300(a)      --          0.0970
1996-Institu-
tional Shares...     9.94     0.4192(a)      0.0200(a)      --          0.4392
1996-Administra-
tion Shares.....     9.94     0.3944(a)      0.0200(a)      --          0.4144
1996-Service
Shares..........     9.95     0.3697(a)      0.0200(a)      --          0.3897
1995-Institu-
tional Shares...     9.79     0.4235(a)      0.1500(a)      --          0.5735
1995-Administra-
tion Shares.....     9.79     0.3989(a)      0.1500(a)      --          0.5489
1995-Service
Shares..........     9.79     0.3744(a)      0.1600(a)      --          0.5344
1994-Institu-
tional Shares...    10.23     0.3787(a)     (0.3575)(a)     --          0.0212
1994-Administra-
tion Shares.....    10.23     0.3537(a)     (0.3575)(a)     --         (0.0038)
1994-Service
Shares(j).......     9.86     0.0475(a)     (0.0700)(a)     --         (0.0225)
1993-Institu-
tional Shares...     9.93     0.3834(a)      0.3000(a)      --          0.6834
1993-Administra-
tion Shares(j)..    10.16     0.1555(a)      0.0720(a)      --          0.2275
FOR THE PERIOD OCTOBER 1, 1992(G) THROUGH OCTOBER 31,
- -----------------------------------------------------
1992-Institu-
tional Shares...    10.00     0.0341(a)     (0.0700)(a)     --         (0.0359)
- -------------------------------------------------------------------------------

<CAPTION> 
                                      DISTRIBUTIONS TO SHAREHOLDERS                                                                
                  ---------------------------------------------------------------------                                            
                               FROM NET              IN EXCESS OF                                                                  
                               REALIZED              NET REALIZED                          NET                                     
                               GAIN ON                 GAIN ON                           INCREASE                         RATIO OF 
                             INVESTMENT,  IN EXCESS  INVESTMENT,   FROM       TOTAL     (DECREASE) NET ASSET                NET    
                   FROM NET   OPTION AND    OF NET    OPTION AND   PAID   DISTRIBUTIONS   IN NET   VALUE AT               EXPENSES 
                  INVESTMENT   FUTURES    INVESTMENT   FUTURES      IN         TO         ASSET     END OF     TOTAL     TO AVERAGE
                    INCOME   TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL SHAREHOLDERS    VALUE     PERIOD   RETURN(K)   NET ASSETS
                  ---------- ------------ ---------- ------------ ------- ------------- ---------- --------- ----------- ----------
                                                           SHORT DURATION TAX-FREE FUND                                             
- -----------------------------------------------------------------------------------------------------------------------------------
<S>               <C>        <C>          <C>        <C>          <C>     <C>           <C>        <C>       <C>         <C>       
FOR THE YEARS ENDED OCTOBER 31,                                                                                                    
- -------------------------------                                                                                                    
1997-Institu-                                                                                                                      
tional Shares...   $(0.4172)       --         --          --        --      $(0.4172)    $ 0.1100   $10.07      5.40%       0.45%  
1997-Administra-                                                                                                                   
tion Shares.....    (0.3924)       --         --          --        --       (0.3924)      0.1100    10.07      5.14        0.70   
1997-Service                                                                                                                       
Shares..........    (0.3675)       --         --          --        --       (0.3675)      0.1000    10.07      4.77        0.95   
1997-Class A                                                                                                                       
Shares(o).......    (0.1950)       --         --          --        --       (0.1950)      0.1400    10.08      3.39(f)     0.70(b)
1997-Class B                                                                                                                       
Shares(o).......    (0.1631)       --         --          --        --       (0.1631)      0.1400    10.08      3.07(f)     1.30(b)
1997-Class C                                                                                                                       
Shares(p).......    (0.0670)       --         --          --        --       (0.0670)      0.0300    10.07      0.97(f)     1.45(b)
1996-Institu-                                                                                                                      
tional Shares...    (0.4192)       --         --          --        --       (0.4192)      0.0300     9.96      4.50        0.45   
1996-Administra-                                                                                                                   
tion Shares.....    (0.3944)       --         --          --        --       (0.3944)      0.0300     9.96      4.24        0.70   
1996-Service                                                                                                                       
Shares..........    (0.3697)       --         --          --        --       (0.3697)      0.0200     9.97      3.98        0.95   
1995-Institu-                                                                                                                      
tional Shares...    (0.4235)       --         --          --        --       (0.4235)      0.1500     9.94      5.98        0.45   
1995-Administra-                                                                                                                   
tion Shares.....    (0.3989)       --         --          --        --       (0.3989)      0.1500     9.94      5.76        0.70   
1995-Service                                                                                                                       
Shares..........    (0.3744)       --         --          --        --       (0.3744)      0.1600     9.95      5.59        0.95   
1994-Institu-                                                                                                                      
tional Shares...    (0.3787)   (0.0825)       --          --        --       (0.4612)     (0.4400)    9.79      0.17        0.45   
1994-Administra-                                                                                                                   
tion Shares.....    (0.3537)   (0.0825)       --          --        --       (0.4362)     (0.4400)    9.79     (0.11)       0.70   
1994-Service                                                                                                                       
Shares(j).......    (0.0475)       --         --          --        --       (0.0475)     (0.0700)    9.79     (0.32)(f)    0.95(b)
1993-Institu-                                                                                                                      
tional Shares...    (0.3834)       --         --          --        --       (0.3834)      0.3000    10.23      7.03        0.41   
1993-Administra-                                                                                                                   
tion Shares(j)..    (0.1555)       --         --          --        --       (0.1555)      0.0720    10.23      2.28(f)     0.70(b)
FOR THE PERIOD OCTOBER 1, 1992(G) THROUGH OCTOBER 31,                                                                              
- -----------------------------------------------------                                                                              
1992-Institu-                                                                                                                      
tional Shares...    (0.0341)       --         --          --        --       (0.0341)     (0.0700)    9.93     (0.34)(f)    0.05(b)

<CAPTION> 
                                                         RATIOS ASSUMING NO    
                                                         VOLUNTARY WAIVER OF   
                                                           FEES OR EXPENSE     
                                                             LIMITATIONS       
                                                        ---------------------  
                                                                               
                       RATIO OF                                     RATIO OF   
                         NET                                          NET      
                      INVESTMENT             NET ASSETS  RATIO OF  INVESTMENT  
                        INCOME   PORTFOLIO   AT END OF   EXPENSES    INCOME    
                      TO AVERAGE TURNOVER      PERIOD   TO AVERAGE TO AVERAGE  
                      NET ASSETS  RATE(D)    (IN 000'S) NET ASSETS NET ASSETS  
                      ---------- ----------- ---------- ---------- ----------   
                                    SHORT DURATION TAX-FREE FUND
- -----------------------------------------------------------------------------
<S>                   <C>        <C>         <C>        <C>        <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Institu-
tional Shares...   $     4.18%    194.75%     $ 28,821     1.23%      3.40%    
1997-Administra-                                                               
tion Shares.....         3.91     194.75            77     1.48       3.13     
1997-Service                                                                   
Shares..........         3.66     194.75         2,051     1.73       2.88     
1997-Class A                                                                   
Shares(o).......         3.81(b)  194.75(f)      4,023     1.73(b)    2.78(b)  
1997-Class B                                                                   
Shares(o).......         3.31(b)  194.75(f)        106     2.23(b)    2.38(b)  
1997-Class C                                                                   
Shares(p).......         2.60(b)  194.75(f)          2     2.23(b)    1.82(b)  
1996-Institu-                                                                  
tional Shares...         4.21     231.65        34,814     1.01       3.65     
1996-Administra-                                                               
tion Shares.....         3.96     231.65            48     1.26       3.40     
1996-Service                                                                   
Shares..........         3.74     231.65           695     1.51       3.18     
1995-Institu-                                                                  
tional Shares...         4.31     259.52        58,389     0.77       3.99     
1995-Administra-                                                               
tion Shares.....         4.14     259.52            46     1.02       3.82     
1995-Service                                                                   
Shares..........         3.87     259.52           454     1.27       3.55     
1994-Institu-                                                                  
tional Shares...         3.74     354.00        83,704     0.61       3.58     
1994-Administra-                                                               
tion Shares.....         3.51     354.00         3,866     0.86       3.35     
1994-Service                                                                   
Shares(j).......         4.30(b)  354.00           440     1.11(b)    4.14(b)  
1993-Institu-                                                                  
tional Shares...         3.70     404.60       115,803     1.06       3.05     
1993-Administra-                                                               
tion Shares(j)..         3.32(b)  404.60           911     1.07(b)    2.95(b)   
FOR THE PERIOD OCTOBER 1, 1992(G) THROUGH OCTOBER 31,
- -----------------------------------------------------
1992-Institu-
tional Shares...         4.58(b)   31.19(f)     14,601     2.68(b)    1.95(b)

<CAPTION> 
                              INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                            ---------------------------------------------------
                                         NET REALIZED
                                             AND        NET REALIZED
                                          UNREALIZED        AND
                                         GAIN (LOSS)     UNREALIZED    TOTAL
                                              ON        GAIN (LOSS)    INCOME
                  NET ASSET              INVESTMENT,     ON FOREIGN    (LOSS)
                  VALUE AT     NET        OPTION AND      CURRENCY      FROM
                  BEGINNING INVESTMENT     FUTURES        RELATED    INVESTMENT
                  OF PERIOD   INCOME     TRANSACTIONS   TRANSACTIONS OPERATIONS
                  --------- ----------   ------------   ------------ ----------
                                     GOVERNMENT INCOME FUND
- -------------------------------------------------------------------------------
<S>               <C>       <C>          <C>            <C>          <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Class A
Shares..........   $14.36    $  0.91       $   0.29          --       $   1.20
1997-Class B
Shares..........    14.37       0.80           0.30          --           1.10
1997-Class C
Shares(p).......    14.38       0.17           0.22          --           0.39
1997-
Institutional
Shares(p).......    14.37       0.20           0.22          --           0.42
1997-Service
Shares(p).......    14.37       0.20           0.21          --           0.41
1996-Class A
shares..........    14.47       0.92          (0.11)         --           0.81
1996-Class B
shares(q).......    14.11       0.41           0.26          --           0.67
1995-Class A
shares..........    13.47       0.94           1.00          --           1.94
1994-Class A
shares..........    14.90       0.85          (1.28)         --          (0.43)
FOR THE PERIOD FEBRUARY 10, 1993(G) THROUGH OCTOBER 31,
- -------------------------------------------------------
1993-Class A
shares..........    14.32       0.56           0.58          --           1.14

<CAPTION> 
                                      DISTRIBUTIONS TO SHAREHOLDERS                                                                
                  ---------------------------------------------------------------------                                            
                               FROM NET              IN EXCESS OF                                                                  
                               REALIZED              NET REALIZED                          NET                                     
                               GAIN ON                 GAIN ON                           INCREASE                         RATIO OF 
                             INVESTMENT,  IN EXCESS  INVESTMENT,   FROM       TOTAL     (DECREASE) NET ASSET                NET    
                   FROM NET   OPTION AND    OF NET    OPTION AND   PAID   DISTRIBUTIONS   IN NET   VALUE AT               EXPENSES 
                  INVESTMENT   FUTURES    INVESTMENT   FUTURES      IN         TO         ASSET     END OF     TOTAL     TO AVERAGE
                    INCOME   TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL SHAREHOLDERS    VALUE     PERIOD   RETURN(K)   NET ASSETS
                  ---------- ------------ ---------- ------------ ------- ------------- ---------- --------- ----------- ----------
                                                              GOVERNMENT INCOME FUND
- -----------------------------------------------------------------------------------------------------------------------------------
<S>               <C>        <C>          <C>        <C>          <C>     <C>           <C>        <C>       <C>         <C>       
FOR THE YEARS ENDED OCTOBER 31,                                                                                                    
- -------------------------------                                                                                                    
1997-Class A                                                                                                                       
Shares..........   $  (0.90)   $ (0.07)        --          --        --     $  (0.97)    $   0.23   $14.59      8.72%       0.50%  
1997-Class B                                                                                                                       
Shares..........      (0.79)     (0.07)        --          --        --        (0.86)        0.24    14.61      7.96        1.25   
1997-Class C                                                                                                                       
Shares(p).......      (0.17)        --         --          --        --        (0.17)        0.22    14.60      2.72(f)     1.25(b)
1997-                                                                                                                              
Institutional                                                                                                                      
Shares(p).......      (0.20)        --         --          --        --        (0.20)        0.22    14.59      2.94(f)     0.25(b)
1997-Service                                                                                                                       
Shares(p).......      (0.19)        --         --          --        --        (0.19)        0.22    14.59      2.85(f)     0.75(b)
1996-Class A                                                                                                                       
shares..........      (0.92)        --         --          --        --        (0.92)       (0.11)   14.36      5.80        0.50   
1996-Class B                                                                                                                       
shares(q).......      (0.41)        --         --          --        --        (0.41)        0.26    14.37      4.85(f)     1.25(b)
1995-Class A                                                                                                                       
shares..........      (0.94)        --         --          --        --        (0.94)        1.00    14.47     14.90        0.47   
1994-Class A                                                                                                                       
shares..........      (0.85)     (0.12)     (0.02)      (0.01)       --        (1.00)       (1.43)   13.47     (2.98)       0.11   
FOR THE PERIOD FEBRUARY 10, 1993(G) THROUGH OCTOBER 31,                                                                            
- -------------------------------------------------------                                                                            
1993-Class A                                                                                                                       
shares..........      (0.56)        --         --          --        --        (0.56)        0.58    14.90      8.03(f)     0.00(b)

<CAPTION> 
                                                         RATIOS ASSUMING NO    
                                                         VOLUNTARY WAIVER OF   
                                                           FEES OR EXPENSE     
                                                             LIMITATIONS       
                                                        ---------------------  
                                                                               
                       RATIO OF                                     RATIO OF   
                         NET                                          NET      
                      INVESTMENT             NET ASSETS  RATIO OF  INVESTMENT  
                        INCOME   PORTFOLIO   AT END OF   EXPENSES    INCOME    
                      TO AVERAGE TURNOVER      PERIOD   TO AVERAGE TO AVERAGE  
                      NET ASSETS  RATE(D)    (IN 000'S) NET ASSETS NET ASSETS  
                      ---------- ----------- ---------- ---------- ----------   
                                    SHORT DURATION TAX-FREE FUND
- -----------------------------------------------------------------------------
<S>                   <C>        <C>         <C>        <C>        <C>
                                     GOVERNMENT INCOME FUND
- ------------------------------------------------------------------------------
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Class A
Shares..........   $     6.38%    395.75%     $ 68,859     1.82%      5.06%
1997-Class B          
Shares..........         5.59     395.75         8,041     2.32       4.52
1997-Class C          
Shares(p).......         5.45(b)  395.75(f)      1,196     2.32(b)    4.38(b)
1997-                 
Institutional         
Shares(p).......         7.03(b)  395.75(f)      1,894     1.32(b)    5.96(b)
1997-Service          
Shares(p).......         6.49(b)  395.75(f)          2     1.82(b)    5.42(b)
1996-Class A          
shares..........         6.42     485.09        30,603     1.89       5.03
1996-Class B          
shares(q).......         5.65(b)  485.09           234     2.39(b)    4.51(b)
1995-Class A          
shares..........         6.67     449.53        29,503     2.34       4.80
1994-Class A          
shares..........         6.06     654.90        14,452     2.86       3.31
FOR THE PERIOD FEBRUARY 10, 1993(G) THROUGH OCTOBER 31,
- -------------------------------------------------------
1993-Class A
shares..........         4.87(b)  725.41(f)     12,860     4.00(b)    0.87(b)

<CAPTION>
                              INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                            ---------------------------------------------------
                                         NET REALIZED
                                             AND        NET REALIZED
                                          UNREALIZED        AND
                                         GAIN (LOSS)     UNREALIZED    TOTAL
                                              ON        GAIN (LOSS)    INCOME
                  NET ASSET              INVESTMENT,     ON FOREIGN    (LOSS)
                  VALUE AT     NET        OPTION AND      CURRENCY      FROM
                  BEGINNING INVESTMENT     FUTURES        RELATED    INVESTMENT
                  OF PERIOD   INCOME     TRANSACTIONS   TRANSACTIONS OPERATIONS
                  --------- ----------   ------------   ------------ ----------
                                        MUNICIPAL INCOME FUND
- -------------------------------------------------------------------------------
<S>               <C>       <C>          <C>            <C>          <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Class A
Shares..........   $14.37      $0.67          $0.62         --           $1.29
1997-Class B
Shares..........    14.37       0.56           0.63         --            1.19
1997-Class C
Shares(p).......    14.85       0.12           0.14         --            0.26
1997-
Institutional
Shares(p).......    14.84       0.15           0.16         --            0.31
1997-Service
Shares(p).......    14.84       0.14           0.15         --            0.29
1996-Class A
shares..........    14.17       0.65           0.20         --            0.85
1996-Class B
shares(q).......    14.03       0.27           0.34         --            0.61
1995-Class A
shares..........    13.08       0.67           1.09         --            1.76
1994-Class A
shares..........    14.64       0.73          (1.51)        --           (0.78)
FOR THE PERIOD JULY 20, 1993(G) THROUGH OCTOBER 31,
- ---------------------------------------------------
1993-Class A
shares..........    14.32       0.22           0.32         --            0.54

<CAPTION> 
                                      DISTRIBUTIONS TO SHAREHOLDERS                                                                
                  ---------------------------------------------------------------------                                            
                               FROM NET              IN EXCESS OF                                                                  
                               REALIZED              NET REALIZED                          NET                                     
                               GAIN ON                 GAIN ON                           INCREASE                         RATIO OF 
                             INVESTMENT,  IN EXCESS  INVESTMENT,   FROM       TOTAL     (DECREASE) NET ASSET                NET    
                   FROM NET   OPTION AND    OF NET    OPTION AND   PAID   DISTRIBUTIONS   IN NET   VALUE AT               EXPENSES 
                  INVESTMENT   FUTURES    INVESTMENT   FUTURES      IN         TO         ASSET     END OF     TOTAL     TO AVERAGE
                    INCOME   TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL SHAREHOLDERS    VALUE     PERIOD   RETURN(K)   NET ASSETS
                  ---------- ------------ ---------- ------------ ------- ------------- ---------- --------- ----------- ----------
                                                       MUNICIPAL INCOME FUND
- -----------------------------------------------------------------------------------------------------------------------------------
<S>               <C>        <C>          <C>        <C>          <C>     <C>           <C>        <C>       <C>         <C>
FOR THE YEARS ENDED OCTOBER 31,                                                                                                    
- -------------------------------                                                                                                    
1997-Class A                                                                                                                       
Shares..........   $  (0.67)       --         --          --        --        $(0.67)       $0.62   $14.99      9.23%       0.85%  
1997-Class B                                                                                                                       
Shares..........      (0.56)       --         --          --        --         (0.56)        0.63    15.00      8.48        1.60   
1997-Class C                                                                                                                       
Shares(p).......      (0.12)       --         --          --        --         (0.12)        0.14    14.99      1.75(f)     1.60(b)
1997-                                                                                                                              
Institutional                                                                                                                      
Shares(p).......      (0.15)       --         --          --        --         (0.15)        0.16    15.00      2.10(f)     0.60(b)
1997-Service                                                                                                                       
Shares(p).......      (0.14)       --         --          --        --         (0.14)        0.15    14.99      1.93(f)     1.10(b)
1996-Class A                                                                                                                       
shares..........      (0.65)       --         --          --        --         (0.65)        0.20    14.37      6.13        0.85   
1996-Class B                                                                                                                       
shares(q).......      (0.27)       --         --          --        --         (0.27)        0.34    14.37      4.40(f)     1.60(b)
1995-Class A                                                                                                                       
shares..........      (0.67)       --         --          --        --         (0.67)        1.09    14.17     13.79        0.76   
1994-Class A                                                                                                                       
shares..........      (0.73)     (0.05)       --          --        --         (0.78)       (1.56)   13.08     (5.51)       0.45   
FOR THE PERIOD JULY 20, 1993(G) THROUGH OCTOBER 31,                                                                                
- ---------------------------------------------------                                                                                
1993-Class A                                                                                                                       
shares..........      (0.22)       --         --          --        --         (0.22)        0.32    14.64      3.73(f)     0.00(b)

<CAPTION> 
                                                         RATIOS ASSUMING NO    
                                                         VOLUNTARY WAIVER OF   
                                                           FEES OR EXPENSE     
                                                             LIMITATIONS       
                                                        ---------------------  
                                                                               
                       RATIO OF                                     RATIO OF   
                         NET                                          NET      
                      INVESTMENT             NET ASSETS  RATIO OF  INVESTMENT  
                        INCOME   PORTFOLIO   AT END OF   EXPENSES    INCOME    
                      TO AVERAGE TURNOVER      PERIOD   TO AVERAGE TO AVERAGE  
                      NET ASSETS  RATE(D)    (IN 000'S) NET ASSETS NET ASSETS  
                      ---------- ----------- ---------- ---------- ----------   
                                      MUNICIPAL INCOME FUND
- -----------------------------------------------------------------------------
<S>                   <C>        <C>         <C>        <C>        <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Class A
Shares..........   $     4.60%    153.12%      $64,553     1.62%      3.83%
1997-Class B          
Shares..........         3.74     153.12         1,750     2.12       3.22
1997-Class C          
Shares(p).......         3.24(b)  153.12(f)        130     2.12(b)    2.72(b)
1997-                 
Institutional         
Shares(p).......         4.41(b)  153.12(f)        351     1.12(b)    3.89(b)
1997-Service          
Shares(p).......         4.24(b)  153.12(f)          2     1.62(b)    3.72(b)
1996-Class A          
shares..........         4.58     344.13        52,267     1.55       3.88
1996-Class B          
shares(q).......         3.55(b)  344.13(f)        255     2.05(b)    3.10(b)
1995-Class A          
shares..........         4.93     335.55        53,797     1.49       4.20
1994-Class A          
shares..........         5.28     357.54        47,373     1.55       4.18
FOR THE PERIOD JULY 20, 1993(G) THROUGH OCTOBER 31,
- ---------------------------------------------------
1993-Class A
shares..........         5.15(b)   99.99(f)     30,166     2.42(b)    2.73(b)
</TABLE>
 
                                       14
<PAGE>
 
<TABLE>
<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                           ------------------------------------------------
                                      NET REALIZED     NET
                                          AND        REALIZED
                                       UNREALIZED      AND
                                      GAIN (LOSS)   UNREALIZED
                                           ON      GAIN (LOSS)     TOTAL
                 NET ASSET            INVESTMENT,   ON FOREIGN    INCOME
                 VALUE AT     NET      OPTION AND    CURRENCY   (LOSS) FROM  FROM NET
                 BEGINNING INVESTMENT   FUTURES      RELATED    INVESTMENT  INVESTMENT
                 OF PERIOD   INCOME   TRANSACTIONS TRANSACTIONS OPERATIONS    INCOME
                 --------- ---------- ------------ ------------ ----------- ----------
                                        CORE FIXED INCOME FUND
- --------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>          <C>          <C>         <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-
Institutional
Shares..........  $ 9.85    $0.6431     $0.2282      $(0.0005)   $ 0.8708    $(0.6408)
1997-
Administration
Shares..........    9.84     0.6182      0.2380       (0.0005)     0.8557     (0.6157)
1997-Service
Shares..........    9.86     0.5937      0.2287       (0.0005)     0.8219     (0.5919)
1997-Class A
Shares(o).......    9.70     0.3059      0.3596       (0.0008)     0.6647     (0.3048)
1997-Class B
Shares(o).......    9.72     0.2686      0.3695       (0.0008)     0.6373     (0.2673)
1997-Class C
Shares(p).......    9.93     0.1118      0.1591       (0.0003)     0.2706     (0.1107)
1996-
Institutional
Shares..........   10.00     0.6448     (0.0704)          --       0.5744     (0.6438)
1996-
Administration
Shares(/1/).....    9.91     0.4083     (0.0703)          --       0.3380     (0.4080)
1996-Service
Shares(l).......    9.77     0.3756      0.0898           --       0.4654     (0.3754)
1995-
Institutional
Shares..........    9.24     0.6423      0.7610           --       1.4033     (0.6433)
FOR THE PERIOD JANUARY 5, 1994(G) THROUGH OCTOBER 31,
- -----------------------------------------------------
1994-
Institutional
Shares..........   10.00     0.4648     (0.7617)          --      (0.2969)    (0.4648)
- --------------------------------------------------------------------------------------

<CAPTION>
                          DISTRIBUTIONS TO SHAREHOLDERS                                                                          
                 ----------------------------------------------------------                                                      
                                          IN EXCESS                                                                              
                   FROM NET                 OF NET                                                          RATIO OF   RATIO OF  
                   REALIZED                REALIZED                            NET                            NET        NET     
                   GAIN ON                 GAIN ON                           INCREASE                       EXPENSES  INVESTMENT 
                 INVESTMENT,  IN EXCESS  INVESTMENT,   FROM       TOTAL     (DECREASE) NET ASSET               TO       INCOME   
                  OPTION AND    OF NET    OPTION AND   PAID   DISTRIBUTIONS   IN NET   VALUE AT             AVERAGE   (LOSS) TO  
                   FUTURES    INVESTMENT   FUTURES      IN         TO         ASSET     END OF     TOTAL      NET      AVERAGE   
                 TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL SHAREHOLDERS    VALUE     PERIOD   RETURN(K)   ASSETS   NET ASSETS 
                 ------------ ---------- ------------ ------- ------------- ---------- --------- ---------- --------- ---------- 
                                                      CORE FIXED INCOME FUND
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>          <C>        <C>          <C>     <C>           <C>        <C>       <C>        <C>       <C>        
FOR THE YEARS ENDED OCTOBER 31,                                                                                                  
- -------------------------------                                                                                                  
1997-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --        --          --          --     $(0.6408)    $ 0.2300   $10.08      9.19%     0.45%      6.53%   
1997-                                                                                                                            
Administration                                                                                                                   
Shares..........       --        --          --          --      (0.6157)      0.2300    10.07      8.92      0.70       6.27    
1997-Service                                                                                                                     
Shares..........       --        --          --          --      (0.5919)      0.2300    10.09      8.65      0.95       6.00    
1997-Class A                                                                                                                     
Shares(o).......       --        --          --          --      (0.3048)      0.3599    10.06      6.94(f)   0.70(b)    6.13(b) 
1997-Class B                                                                                                                     
Shares(o).......       --        --          --          --      (0.2673)      0.3700    10.09      6.63(f)   1.45(b)    5.28(b) 
1997-Class C                                                                                                                     
Shares(p).......       --        --          --          --      (0.1107)      0.1599    10.09      2.74(f)   1.45(b)    4.84(b) 
1996-                                                                                                                            
Institutional                                                                                                                    
Shares..........   (0.0806)      --          --          --      (0.7244)     (0.1500)    9.85      5.98      0.45       6.51    
1996-                                                                                                                            
Administration                                                                                                                   
Shares(/1/).....       --        --          --          --      (0.4080)     (0.0700)    9.84      3.56(f)   0.70(b)    6.41(b) 
1996-Service                                                                                                                     
Shares(l).......       --        --          --          --      (0.3754)      0.0900     9.86      4.90(f)   0.95(b)    6.37(b) 
1995-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --        --          --          --      (0.6433)      0.7600    10.00     15.72      0.45       6.56    
FOR THE PERIOD JANUARY 5, 1994(G) THROUGH OCTOBER 31,                                                                            
- -----------------------------------------------------                                                                            
1994-                                                                                                                            
Institutional                                                                                                                    
Shares..........       --        --          --          --      (0.4648)     (0.7617)    9.24     (3.00)     0.45(b)    6.48(b) 

<CAPTION>
                                        RATIOS ASSUMING NO
                                        VOLUNTARY WAIVER OF
                                          FEES OR EXPENSE
                                            LIMITATIONS
                                        --------------------
                 
                                                   RATIO OF
                                        RATIO OF     NET
                                        EXPENSES  INVESTMENT
                             NET ASSETS    TO       INCOME
                 PORTFOLIO   AT END OF  AVERAGE   (LOSS) TO
                 TURNOVER      PERIOD     NET      AVERAGE
                  RATE(D)    (IN 000'S)  ASSETS   NET ASSETS
                 ----------- ---------- --------- ----------
                             CORE FIXED INCOME FUND
- ------------------------------------------------------------
<S>              <C>          <C>        <C>          <C>   
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-
Institutional
Shares..........   361.27%      $79,230    0.83%      6.15%         
1997-                                                               
Administration                                                      
Shares..........   361.27         6,176    1.08       5.89          
1997-Service                                                        
Shares..........   361.27         1,868    1.33       5.62          
1997-Class A                                                        
Shares(o).......   361.27(f)      9,336    1.33(b)    5.50(b)       
1997-Class B                                                        
Shares(o).......   361.27(f)        621    1.83(b)    4.90(b)       
1997-Class C                                                        
Shares(p).......   361.27(f)        272    1.83(b)    4.46(b)       
1996-                                                               
Institutional                                                       
Shares..........   414.20        72,061    0.83       6.13          
1996-                                                               
Administration                                                      
Shares(/1/).....   414.20           702    1.08(b)    6.03(b)       
1996-Service                                                        
Shares(l).......   414.20           381    1.33(b)    5.99(b)       
1995-                                                               
Institutional                                                       
Shares..........   382.26        55,502    0.96       6.05           
FOR THE PERIOD JANUARY 5, 1994(G) THROUGH OCTOBER 31,
- -----------------------------------------------------
1994-
Institutional
Shares..........   285.25        24,508    1.46(b)    5.47(b)

<CAPTION>
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                           ------------------------------------------------
                                      NET REALIZED     NET
                                          AND        REALIZED
                                       UNREALIZED      AND
                                      GAIN (LOSS)   UNREALIZED
                                           ON      GAIN (LOSS)     TOTAL
                 NET ASSET            INVESTMENT,   ON FOREIGN    INCOME
                 VALUE AT     NET      OPTION AND    CURRENCY   (LOSS) FROM  FROM NET
                 BEGINNING INVESTMENT   FUTURES      RELATED    INVESTMENT  INVESTMENT
                 OF PERIOD   INCOME   TRANSACTIONS TRANSACTIONS OPERATIONS    INCOME
                 --------- ---------- ------------ ------------ ----------- ----------
                                          GLOBAL INCOME FUND
- --------------------------------------------------------------------------------------
<S>              <C>       <C>        <C>          <C>          <C>         <C>

FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Class A
shares..........  $14.53    $  0.59     $  0.50      $   0.27    $   1.36    $  (0.79)
1997-Class B
shares..........   14.53       0.72        0.36          0.20        1.28       (0.73)
1997-Class C
shares(p).......   14.80       0.16        0.19          0.10        0.45       (0.19)
1997-
Institutional
Shares..........   14.52       0.88        0.37          0.19        1.44       (0.87)
1997-Service
Shares(s).......   14.69       0.53        0.25          0.14        0.92       (0.52)
1996-Class A
shares..........   14.45       0.71        0.62          0.18        1.51       (1.43)
1996-Class B
shares(q).......   14.03       0.34        0.41          0.11        0.86       (0.36)
1996-
Institutional
shares..........   14.45       1.15        0.32          0.10        1.57       (1.50)
1995-Class A
shares..........   13.43       0.89        0.92          0.15        1.96       (0.94)
1995-
Institutional
shares(r).......   14.09       0.22        0.34          0.06        0.62       (0.26)
1994-Class A
shares..........   15.07       0.84       (1.37)        (0.12)      (0.65)      (0.22)
1993-Class A
shares..........   14.69       0.85        1.07         (0.42)       1.50       (0.85)
1992-Class A
shares..........   14.60       1.14        0.45         (0.36)       1.23       (1.14)
FOR THE PERIOD AUGUST 2, 1991(G) THROUGH OCTOBER 31,
- ----------------------------------------------------
1991-Class A
shares..........   14.55       0.25        0.23         (0.19)       0.29       (0.24)

<CAPTION>
                          DISTRIBUTIONS TO SHAREHOLDERS                                                                          
                 ----------------------------------------------------------                                                      
                                          IN EXCESS                                                                              
                   FROM NET                 OF NET                                                          RATIO OF   RATIO OF  
                   REALIZED                REALIZED                            NET                            NET        NET     
                   GAIN ON                 GAIN ON                           INCREASE                       EXPENSES  INVESTMENT 
                 INVESTMENT,  IN EXCESS  INVESTMENT,   FROM       TOTAL     (DECREASE) NET ASSET               TO       INCOME   
                  OPTION AND    OF NET    OPTION AND   PAID   DISTRIBUTIONS   IN NET   VALUE AT             AVERAGE   (LOSS) TO  
                   FUTURES    INVESTMENT   FUTURES      IN         TO         ASSET     END OF     TOTAL      NET      AVERAGE   
                 TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL SHAREHOLDERS    VALUE     PERIOD   RETURN(K)   ASSETS   NET ASSETS 
                 ------------ ---------- ------------ ------- ------------- ---------- --------- ---------- --------- ---------- 
                                                        GLOBAL INCOME FUND
- ---------------------------------------------------------------------------------------------------------------------------------
<S>              <C>          <C>        <C>          <C>     <C>           <C>        <C>       <C>        <C>       <C>        
FOR THE YEARS ENDED OCTOBER 31,                                                                                                  
- -------------------------------                                                                                                  
1997-Class A                                                                                                                     
shares..........        --        --          --          --    $  (0.79)    $   0.57   $15.10      9.66%     1.17%      5.19%   
1997-Class B                                                                                                                     
shares..........        --        --          --          --       (0.73)        0.55    15.08      9.04      1.71       4.76    
1997-Class C                                                                                                                     
shares(p).......        --        --          --          --       (0.19)        0.26    15.06      3.03(f)   1.71(b)    4.98(b) 
1997-                                                                                                                            
Institutional                                                                                                                    
Shares..........        --        --          --          --       (0.87)        0.57    15.09     10.26      0.65       5.72    
1997-Service                                                                                                                     
Shares(s).......        --        --          --          --       (0.52)        0.40    15.09      6.42(f)   1.15(b)    5.33(b) 
1996-Class A                                                                                                                     
shares..........        --        --          --          --       (1.43)        0.08    14.53     11.05      1.16       5.81    
1996-Class B                                                                                                                     
shares(q).......        --        --          --          --       (0.36)        0.50    14.53      6.24(f)   1.70(b)    5.16(b) 
1996-                                                                                                                            
Institutional                                                                                                                    
shares..........        --        --          --          --       (1.50)        0.07    14.52     11.55      0.65       6.35    
1995-Class A                                                                                                                     
shares..........        --        --          --          --       (0.94)        1.02    14.45     15.08      1.29       6.23    
1995-                                                                                                                            
Institutional                                                                                                                    
shares(r).......        --        --          --          --       (0.26)        0.36    14.45      4.42(f)   0.65(b)    6.01(b) 
1994-Class A                                                                                                                     
shares..........     (0.16)       --          --       (0.61)      (0.99)       (1.64)   13.43     (4.49)     1.28       5.73    
1993-Class A                                                                                                                     
shares..........     (0.27)       --          --          --       (1.12)        0.38    15.07     10.75      1.30       5.78    
1992-Class A                                                                                                                     
shares..........        --        --          --          --       (1.14)        0.09    14.69      8.77      1.37       7.85    
FOR THE PERIOD AUGUST 2, 1991(G) THROUGH OCTOBER 31,                                                                             
- ----------------------------------------------------                                                                             
1991-Class A                                                                                                                     
shares..........        --        --          --          --       (0.24)        0.05    14.60      2.00(f)   0.38(f)    1.72(f) 


<CAPTION>
                                        RATIOS ASSUMING NO
                                        VOLUNTARY WAIVER OF
                                          FEES OR EXPENSE
                                            LIMITATIONS
                                        --------------------
                 
                                                   RATIO OF
                                        RATIO OF     NET
                                        EXPENSES  INVESTMENT
                             NET ASSETS    TO       INCOME
                 PORTFOLIO   AT END OF  AVERAGE   (LOSS) TO
                 TURNOVER      PERIOD     NET      AVERAGE
                  RATE(D)    (IN 000'S)  ASSETS   NET ASSETS
                 ----------- ---------- --------- ----------
                              GLOBAL INCOME FUND
- ------------------------------------------------------------
<S>              <C>         <C>        <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1997-Class A
shares..........   383.72%     $167,096    1.60%      4.76%
1997-Class B       
shares..........   383.72         3,465    2.10       4.37
1997-Class C       
shares(p).......   383.72(f)        496    2.10(b)    4.59(b)
1997-              
Institutional      
Shares..........   383.72        60,929    1.04       5.33
1997-Service       
Shares(s).......   383.72(f)        151    1.54(b)    4.94(b)
1996-Class A       
shares..........   232.15       198,665    1.64       5.33
1996-Class B       
shares(q).......   232.15(f)        256    2.14(b)    4.72(b)
1996-              
Institutional      
shares..........   232.15        54,254    1.11       5.89
1995-Class A       
shares..........   265.86       245,835    1.58       5.94
1995-              
Institutional      
shares(r).......   265.86(f)     31,619    1.08(b)    5.58(b)
1994-Class A       
shares..........   343.74       396,584    1.53       5.48
1993-Class A       
shares..........   313.88       675,662    1.55       5.53
1992-Class A       
shares..........   270.75       588,893    1.62       7.60
FOR THE PERIOD AUGUST 2, 1991(G) THROUGH OCTOBER 31,
- ----------------------------------------------------
1991-Class A
shares..........   34.22(f)    388,744    0.44(f)    1.66(f)
</TABLE>
 
                                       15
<PAGE>
 
<TABLE>
<CAPTION>
 
 
                             INCOME (LOSS) FROM INVESTMENT OPERATIONS(N)
                           ------------------------------------------------
                                      NET REALIZED     NET
                                          AND        REALIZED
                                       UNREALIZED      AND
                                      GAIN (LOSS)   UNREALIZED
                                           ON      GAIN (LOSS)     TOTAL
                 NET ASSET            INVESTMENT,   ON FOREIGN    INCOME
                 VALUE AT     NET      OPTION AND    CURRENCY   (LOSS) FROM
                 BEGINNING INVESTMENT   FUTURES      RELATED    INVESTMENT
                 OF PERIOD   INCOME   TRANSACTIONS TRANSACTIONS OPERATIONS
                 --------- ---------- ------------ ------------ -----------
<S>              <C>       <C>        <C>          <C>          <C>
- ---------------------------------------------------------------------------
FOR THE PERIOD AUGUST 1, 1997(G) THROUGH OCTOBER 31,
- ----------------------------------------------------
1997-Class A
Shares..........  $10.00     $0.17       $(0.03)       0.01        $0.15
1997-Class B
Shares..........   10.00      0.15        (0.03)       0.01         0.13
1997-Class C
Shares(p).......    9.97      0.14          --         0.01         0.12
1997-Institu-
tional Shares...   10.00      0.18        (0.03)       0.01         0.16
1997-Service
Shares..........   10.00      0.17        (0.03)       0.01         0.15
<CAPTION>
                                                                                                                        
                                                                                                                        
                                                                                                                        
                                     DISTRIBUTIONS TO SHAREHOLDERS                                                      
                 ---------------------------------------------------------------------                                  
                                                     IN EXCESS                                                          
                              FROM NET                 OF NET                                                           
                              REALIZED                REALIZED                            NET                           
                              GAIN ON                 GAIN ON                           INCREASE                        
                            INVESTMENT,  IN EXCESS  INVESTMENT,   FROM       TOTAL     (DECREASE) NET ASSET             
                  FROM NET   OPTION AND    OF NET    OPTION AND   PAID   DISTRIBUTIONS   IN NET   VALUE AT              
                 INVESTMENT   FUTURES    INVESTMENT   FUTURES      IN         TO         ASSET     END OF     TOTAL     
                   INCOME   TRANSACTIONS   INCOME   TRANSACTIONS CAPITAL SHAREHOLDERS    VALUE     PERIOD   RETURN(K)   
                 ---------- ------------ ---------- ------------ ------- ------------- ---------- --------- ----------- 
<S>              <C>        <C>          <C>        <C>          <C>     <C>           <C>        <C>       <C>         
                                                     HIGH YIELD FUND                                                             
- ------------------------------------------------------------------------------------------------------------------------
FOR THE PERIOD AUGUST 1, 1997(G) THROUGH OCTOBER 31,                                                                    
- ----------------------------------------------------                                                                    
1997-Class A                                                                                                            
Shares..........   $(0.17)      --         $(0.01)      --         --       $(0.18)      $(0.03)    $9.97     1.50%(f)  
1997-Class B                                                                                                            
Shares..........    (0.15)      --          (0.01)      --         --        (0.16)       (0.03)     9.97     1.31(f)   
1997-Class C                                                                                                            
Shares(p).......    (0.14)      --          (0.01)      --         --        (0.15)       (0.03)     9.97     1.46(f)   
1997-Institu-                                                                                                           
tional Shares...    (0.18)      --          (0.01)      --         --        (0.19)       (0.03)     9.97     1.58(f)   
1997-Service                                                                                                            
Shares..........    (0.17)      --          (0.01)      --         --        (0.18)       (0.03)     9.97     1.46(f)   

<CAPTION>
                                                                  RATIOS ASSUMING
                                                                NO VOLUNTARY WAIVER
                                                                    OF FEES OR
                                                                EXPENSE LIMITATIONS
                                                                ----------------------
                 
                  RATIO OF    RATIO OF                                      RATIO OF
                    NET         NET                             RATIO OF      NET
                  EXPENSES   INVESTMENT                         EXPENSES   INVESTMENT
                     TO        INCOME                NET ASSETS    TO        INCOME
                  AVERAGE    (LOSS) TO   PORTFOLIO   AT END OF  AVERAGE    (LOSS) TO
                    NET       AVERAGE    TURNOVER      PERIOD     NET       AVERAGE
                   ASSETS    NET ASSETS   RATE(D)    (IN 000'S)  ASSETS    NET ASSETS
                  ---------- ----------- ----------- ---------- ---------- -----------
<S>               <C>        <C>         <C>         <C>        <C>        <C>
                                            HIGH YIELD FUND
- --------------------------------------------------------------------------------------
FOR THE PERIOD AUGUST 1, 1997(G) THROUGH OCTOBER 31,
- ----------------------------------------------------
1997-Class A
Shares..........   0.95%(b)    7.06%(b)   44.80%(f)  $325,911    1.57%(b)    6.44%(b)
1997-Class B
Shares..........   1.70(b)     6.28(b)    44.80(f)     10.308    2.07(b)     5.91(b)
1997-Class C
Shares(p).......   1.70(b)     6.17(b)    44.80(f)      1,791    2.07(b)     5.80(b)
1997-Institu-
tional Shares...   0.70(b)     7.16(b)    44.80(f)          2    1.07(b)     6.79(b)
1997-Service
Shares..........   1.20(b)     6.69(b)    44.80(f)          2    1.57(b)     6.32(b)
</TABLE>
 
(a) Calculated based on the average shares outstanding methodology.
(b) Annualized
(c) Class A share activity commenced on May 15, 1995.
(d) Includes the effect of mortgage dollar roll transactions.
(e) Administration share activity commenced on April 15, 1993.
(f) Not annualized.
(g) Commencement of operations.
(h) Short Duration Government Fund Administration shares were redeemed in full
    on February 23, 1995 and re-commenced on February 28, 1996 at $9.86.
(i) Service share activity commenced on April 10, 1996.
(j) Administration and service share activity commenced on May 20, 1993 and
    September 20, 1994, respectively.
(k) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions, a complete redemption of
    the investment at the net asset value at the end of the period and no
    sales charges. Total return would be reduced if a sale charge for Class A
    shares or a contingent deferred sales charge for Class B and Class C
    shares were taken into account.
(l) Administration and Service share activity commenced on February 28, 1996
    and March 13, 1996, respectively.
(m) Service charge activity commenced on March 27, 1997.
(n) Includes the balancing effect of calculating per share amounts.
(o) Class A and Class B share activity commenced on May 1, 1997.
(p) Commenced operations on August 15, 1997.
(q) Class B shares commenced operations on May 1, 1996.
(r) Institutional shares commenced operations on August 1, 1995.
(s) Service Class shares commenced operations on March 12, 1997.
 
                                       16
<PAGE>
 
 
                      INVESTMENT OBJECTIVES AND POLICIES
 
  The investment objectives and principal investment policies of each Fund are
described below. Other investment practices and management techniques, which
involve certain risks, are described under "Description of Securities," "Risk
Factors" and "Investment Techniques." There can be no assurance that a Fund's
investment objectives will be achieved.
 
  A Fund's duration approximates its price sensitivity to changes in interest
rates. Maturity measures the time until final payment is due; it takes no
account of the pattern of a security's cash flows over time. In computing
portfolio duration, a Fund will estimate the duration of obligations that are
subject to prepayment or redemption by the issuer taking into account the
influence of interest rates on prepayments and coupon flows. This method of
computing duration is known as "option-adjusted" duration. A Fund will not be
limited as to its maximum weighted average portfolio maturity or the maximum
stated maturity with respect to individual securities unless otherwise noted.
 
  A Fund will deem a security to have met its minimum credit rating
requirement if the security receives the minimum required long-term rating (or
the equivalent short-term credit rating) at the time of purchase from at least
one nationally recognized statistical rating organization ("NRSRO") including,
but not limited to, Standard & Poor's Ratings Group ("S&P") and Moody's
Investors Service, Inc. ("Moody's") even though it has been rated below the
minimum rating by one or more other NRSROs, or, if unrated, is determined by
the Investment Adviser to be of comparable quality. If a security satisfies a
Fund's minimum rating criteria at the time of purchase and is subsequently
downgraded below such rating, the Fund will not be required to dispose of such
security. If a downgrade occurs, the Investment Adviser will consider what
action, including the sale of such security, is in the best interest of a Fund
and its shareholders.
 
  The Investment Adviser will usually have access to the research of, and
certain proprietary technical models developed by, Goldman Sachs and will
apply quantitative and qualitative analysis in determining the appropriate
allocations among the categories of issuers and types of securities.
 
 ADJUSTABLE RATE GOVERNMENT FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income, consistent with low volatility of principal.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be in a range approximately equal to that of a six-month to one-
year U.S. Treasury security. In addition, under normal interest rate
conditions, the Fund's maximum duration will not exceed two years. The
approximate interest rate sensitivity of the Fund is expected to be comparable
to a nine-month note.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in U.S. Government Securities that are adjustable rate
mortgage pass-through securities and other mortgage securities with periodic
interest rate resets. The remainder of the Fund's assets (up to 35%) may be
invested in other U.S. Government Securities, including fixed rate mortgage
pass-through securities, other securities representing an interest in or
collateralized by adjustable rate and fixed rate mortgage loans ("Mortgage-
Backed Securities") and repurchase agreements collateralized by U.S.
Government Securities. Substantially all of the Fund's assets will be invested
in U.S. Government Securities. 100% of the Fund's portfolio will be invested
in U.S. dollar-denominated securities.
 
                                      17
<PAGE>
 
  CREDIT QUALITY. The Fund invests in U.S. Government Securities and
repurchase agreements collateralized by such securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), mortgage and
interest rate swaps and interest rate floors, caps and collars. The Fund may
also employ other investment techniques to seek to enhance returns, such as
lending portfolio securities and entering into mortgage dollar rolls,
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 SHORT DURATION GOVERNMENT FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide a high level of
current income. Secondarily, the Fund may, in seeking current income, also
consider the potential for capital appreciation.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the two-year U.S.
Treasury security, plus or minus .5 years. In addition, under normal interest
rate conditions, the Fund's maximum duration will not exceed three years. The
approximate interest rate sensitivity of the Fund is expected to be comparable
to a two-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal market conditions, at
least 65% of its total assets in U.S. Government Securities and in repurchase
agreements collateralized by such securities. Substantially all of the Fund's
assets will be invested in U.S. Government Securities. 100% of the Fund's
portfolio will be invested in U.S. dollar-denominated securities.
 
  CREDIT QUALITY. The Fund invests in U.S. Government Securities and
repurchase agreements collateralized by such securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), mortgage and
interest rate swaps and interest rate floors, caps and collars. The Fund may
also employ other investment techniques to seek to enhance returns, such as
lending portfolio securities and entering into mortgage dollar rolls,
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 SHORT DURATION TAX-FREE FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income, consistent with relatively low volatility of
principal, that is exempt from regular federal income tax.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
three-year Municipal Bond Index, plus or minus .5 years. In addition, under
normal interest rate conditions, the Fund's maximum duration will not exceed
four years. The approximate interest rate sensitivity of the Fund is expected
to be comparable to a three-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal conditions, at least 80%
of its net assets in fixed- income securities issued by or on behalf of
states, territories and possessions of the United States (including the
 
                                      18
<PAGE>
 
District of Columbia) and the political subdivisions, agencies and
instrumentalities thereof ("Municipal Securities"), the interest on which is
exempt from regular federal income tax (i.e., excluded from gross income for
federal income tax purposes) and is not a tax preference item under the
federal alternative minimum tax. Under normal circumstances, the Fund's
investments in private activity bonds and taxable investments will not exceed,
in the aggregate, 20% of the Fund's net assets. The interest from certain
private activity bonds (including the Fund's distributions of such interest)
may be a preference item for purposes of the federal alternative minimum tax.
100% of the Fund's portfolio will be invested in U.S. dollar-denominated
securities.
 
  CREDIT QUALITY. The Municipal Securities in which the Fund invests will be
rated, at the time of investment, at least BBB or Baa by an NRSRO or, if
unrated, will be determined by the Investment Adviser to be of comparable
quality. Municipal Securities rated BBB or Baa are considered medium-grade
obligations with speculative characteristics and adverse economic conditions
or changing circumstances may weaken their issuers' capability to pay interest
and repay principal. The credit rating assigned to Municipal Securities may
reflect the existence of guarantees, letters of credit or other credit
enhancement features available to the issuers or holders of such Municipal
Securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), interest rate
swaps, floors, caps and collars. The Fund may also employ other investment
techniques to seek to enhance returns, such as lending portfolio securities
and entering into repurchase agreements and other investment practices
described under "Investment Techniques."
 
  While the Fund, under normal market conditions, invests substantially all of
its assets in Municipal Securities, the recognition of certain accrued market
discount income (if the Fund acquires Municipal Securities or other
obligations at a market discount), income from investments other than
Municipal Securities and any capital gains generated from the disposition of
investments, will result in taxable income. In addition to federal income tax,
shareholders may be subject to state, local or foreign taxes on distributions
of such income received from the Fund. See "Description of Securities."
 
 GOVERNMENT INCOME FUND
 
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income, consistent with safety of principal.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
Mutual Fund Government/Mortgage Index, plus or minus one year. In addition,
under normal interest rate conditions, the Fund's maximum duration will not
exceed six years. The approximate interest rate sensitivity of the Fund is
expected to be comparable to a five-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in U.S. Government Securities and in repurchase
agreements collateralized by such securities. The remainder of the Fund's
assets may be invested in non-government securities such as privately issued
Mortgage-Backed Securities, Asset-Backed Securities and corporate securities.
100% of the Fund's portfolio will be invested in U.S. dollar-denominated
securities.
 
  CREDIT QUALITY. The Fund's non-U.S. Government Securities will be rated, at
the time of investment, AAA or Aaa by an NRSRO or, if unrated, will be
determined by the Investment Adviser to be of comparable quality.
 
                                      19
<PAGE>
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), mortgage, credit
and interest rate swaps and interest rate floors, caps and collars. The Fund
may also employ other investment techniques to seek to enhance returns, such
as lending portfolio securities and entering into mortgage dollar rolls,
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 MUNICIPAL INCOME FUND
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income that is exempt from regular federal income tax,
consistent with preservation of capital.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
fifteen-year Municipal Bond Index, plus or minus one year. In addition, under
normal interest rate conditions, the Fund's maximum duration will not exceed
twelve years. The approximate interest rate sensitivity of the Fund is
expected to be comparable to a fifteen-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
80% of its net assets in Municipal Securities, the interest on which is exempt
from regular federal income tax (i.e., excluded from gross income for federal
income tax purposes). The Fund may invest up to 100% of its net assets in
private activity bonds, the interest from certain of which (including the
Fund's distributions of such interest) may be a preference item for purposes
of the federal alternative minimum tax. 100% of the Fund's portfolio will be
invested in U.S. dollar-denominated securities.
 
  CREDIT QUALITY. Under normal market conditions, the weighted average credit
quality of the Fund's portfolio will be equivalent to that of securities rated
AA or Aa by an NRSRO. All securities purchased by the Fund will be rated, at
the time of investment, at least BBB or Baa by an NRSRO or, if unrated, will
be determined by the Investment Adviser to be of comparable quality. Fixed-
income securities rated BBB or Baa are considered medium-grade obligations
with speculative characteristics, and adverse economic conditions or changing
circumstances may weaken their issuers' capability to pay interest and repay
principal. The credit rating assigned to Municipal Securities may reflect the
existence of guarantees, letters of credit or other credit enhancement
features available to the issuers or holders of such Municipal Securities.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure and to seek to enhance returns. These
techniques include, but are not limited to, the use of financial futures
contracts, option contracts (including options on futures), interest rate
swaps, interest rate floors, caps and collars. The Fund may also employ other
investment techniques to seek to enhance returns, such as lending portfolio
securities and entering into repurchase agreements and other investment
practices described under "Investment Techniques."
 
  While the Fund, under normal market conditions, invests substantially all of
its assets in Municipal Securities, the recognition of certain accrued market
discount income (if the Fund acquires Municipal Securities or other
obligations at a market discount), income from investments other than
Municipal Securities and any capital gains generated from the disposition of
investments, will result in taxable income. In addition to federal income tax,
shareholders may be subject to state, local or foreign taxes on distributions
of such income received from the Fund. See "Description of Securities."
 
                                      20
<PAGE>
 
 CORE FIXED INCOME FUND
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
total return consisting of capital appreciation and income that exceeds the
total return of the Lehman Brothers Aggregate Bond Index (the "Index").
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers
Aggregate Bond Index, plus or minus one year. In addition, under normal
interest rate conditions, the Fund's maximum duration will not exceed six
years. The approximate interest rate sensitivity of the Fund is expected to be
comparable to a five-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in fixed-income securities, including U.S. Government
Securities, corporate debt securities, Mortgage-Backed Securities, and Asset-
Backed Securities. The Fund may invest up to 25% of its total assets in
obligations of domestic and foreign issuers which are denominated in
currencies other than the U.S. dollar, 10% of which may be invested in issuers
in countries with emerging markets and economies. A number of investment
strategies will be used to achieve the Fund's investment objective, including
market sector selection, determination of yield curve exposure, and issuer
selection. In addition, the Investment Adviser will attempt to take advantage
of pricing inefficiencies in the fixed-income markets.
 
  The Index currently includes U.S. Government Securities and fixed-rate,
publicly issued, U.S. dollar-denominated fixed-income securities rated at
least BBB or Baa by an NRSRO. The securities currently included in the Index
have at least one year remaining to maturity; have an outstanding principal
amount of at least $100 million; and are issued by the following types of
issuers, with each category receiving a different weighting in the Index: U.S.
Treasury; agencies, authorities or instrumentalities of the U.S. government;
issuers of Mortgage-Backed Securities; utilities; industrial issuers;
financial institutions; foreign issuers; and issuers of Asset-Backed
Securities. The Index is a trademark of Lehman Brothers. Inclusion of a
security in the Index does not imply an opinion by Lehman Brothers as to its
attractiveness or appropriateness for investment. Although Lehman Brothers
obtains factual information used in connection with the Index from sources
which it considers reliable, Lehman Brothers claims no responsibility for the
accuracy, completeness or timeliness of such information and has no liability
to any person for any loss arising from results obtained from the use of the
Index data.
 
  CREDIT QUALITY. All U.S. dollar-denominated fixed-income securities
purchased by the Fund will be rated, at the time of investment, at least BBB
or Baa by an NRSRO. The non-U.S. dollar-denominated fixed-income securities in
which the Fund may invest will be rated, at the time of investment, at least
AA or Aa by an NRSRO or, if unrated, will be determined by the Investment
Adviser to be of comparable quality. Fixed-income securities rated BBB or Baa
are considered medium-grade obligations with speculative characteristics, and
adverse economic conditions or changing circumstances may weaken their
issuers' capability to pay interest and repay principal.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure, to seek to hedge its exposure to foreign
securities and to seek to enhance returns. These techniques include, but are
not limited to, the use of financial futures contracts, option contracts
(including options on futures), forward foreign currency exchange contracts,
currency options and futures, currency, mortgage, credit and interest rate
swaps and interest rate floors, caps and collars. Currency management
techniques involve risks different from those associated with investing solely
in U.S. dollar-denominated fixed-income securities of U.S. issuers. It is
expected that the Fund will use certain currency techniques to seek to hedge
against currency
 
                                      21
<PAGE>
 
exchange rate fluctuations or to seek to increase total return. The Fund may
invest in custodial receipts, Municipal Securities and convertible securities.
The Fund may also employ other investment techniques to seek to enhance
returns, such as lending portfolio securities and entering into mortgage
dollar rolls, repurchase agreements and other investment practices, described
under "Investment Techniques."
 
 GLOBAL INCOME FUND
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high total return, emphasizing current income and, to a lesser extent,
providing opportunities for capital appreciation.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the J.P. Morgan Global
Government Bond Index (hedged), plus or minus 2.5 years. In addition, under
normal interest rate conditions, the Fund's maximum duration will not exceed
7.5 years. The approximate interest rate sensitivity of the Fund is expected
to be comparable to a six-year bond.
 
  INVESTMENT SECTOR. The Fund invests primarily in a portfolio of high quality
fixed-income securities of U.S. and foreign issuers and enters into
transactions in foreign currencies. Under normal market conditions, the Fund
will (i) have at least 30% of its total assets, after considering the effect
of currency positions, denominated in U.S. dollars and (ii) invest in
securities of issuers in at least three countries. The Fund may also invest up
to 10% of its total assets in issuers in countries with emerging markets and
economies. The Fund seeks to meet its investment objective by pursuing
investment opportunities in foreign and domestic fixed-income securities
markets and by engaging in currency transactions to seek to enhance returns
and to seek to hedge its portfolio against currency exchange rate
fluctuations.
 
  The fixed-income securities in which the Fund may invest include: (i) U.S.
Government Securities and custodial receipts therefor; (ii) securities issued
or guaranteed by a foreign government or any of its political subdivisions,
authorities, agencies, instrumentalities or by supranational entities (i.e.,
international organizations designated or supported by governmental entities
to promote economic reconstruction or development, such as the World Bank);
(iii) corporate debt securities; (iv) certificates of deposit and bankers'
acceptances issued or guaranteed by, or time deposits maintained at, U.S. or
foreign banks (and their branches wherever located) having total assets of
more than $1 billion; (v) commercial paper; and (vi) Mortgage-Backed and
Asset-Backed Securities.
 
  CREDIT QUALITY. All securities purchased by the Fund will be rated, at the
time of investment, at least BBB or Baa by an NRSRO. However, the Fund will
invest at least 50% of its total assets in securities rated, at the time of
investment, AAA or Aaa by an NRSRO. Unrated securities will be determined by
the Investment Adviser to be of comparable quality. Fixed-income securities
rated BBB or Baa are considered medium-grade obligations with speculative
characteristics, and adverse economic conditions or changing circumstances may
weaken their issuers capability to pay interest and repay principal.
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure, to seek to hedge its exposure to foreign
currencies and to seek to enhance returns. These techniques include, but are
not limited to, the use of financial futures contracts, option contracts
(including options on futures), forward foreign currency exchange contracts,
currency options and futures, currency, mortgage, credit and interest rate
swaps and interest rate floors, caps and collars. Currency management
techniques involve risks different from those associated with investing solely
in U.S. dollar-denominated fixed-income securities of U.S. issuers. It is
expected that the Fund will use certain currency techniques to seek to hedge
against currency
 
                                      22
<PAGE>
 
exchange rate fluctuations or to seek to increase total return. While the Fund
will have both long and short currency positions, its net long and short
foreign currency exposure will not exceed the value of the Fund's total
assets. To the extent that the Fund is fully invested in foreign securities
while also maintaining currency positions, it may be exposed to greater
combined risk. The Fund's net currency positions may expose it to risks
independent of its securities positions. The Fund may also employ other
investment techniques to seek to enhance returns, such as lending portfolio
securities and entering into mortgage dollar rolls, repurchase agreements and
other investment practices described under "Investment Techniques."
 
  The Fund may invest more than 25% of its total assets in the securities of
corporate and governmental issuers located in each of Canada, Germany, Japan,
and the United Kingdom as well as in the securities of U.S. issuers.
Concentration of the Fund's investments in such issuers will subject the Fund,
to a greater extent than if investment was more limited, to the risks of
adverse securities markets, exchange rates and social, political or economic
events which may occur in those countries. Not more than 25% of the Fund's
total assets will be invested in the securities of issuers in any other single
foreign country.
 
 HIGH YIELD FUND
 
  OBJECTIVE. The Fund's investment objective is to provide investors with a
high level of current income and may also consider the potential for capital
appreciation.
 
  DURATION. Under normal interest rate conditions, the Fund's duration is
expected to be equal to that of the Fund's benchmark, the Lehman Brothers High
Yield Bond Index, plus or minus 2.5 years. In addition, under normal interest
rate conditions, the Fund's maximum duration will not exceed 7.5 years. The
approximate interest rate sensitivity of the Fund is expected to be comparable
to a 6-year bond.
 
  INVESTMENT SECTOR. The Fund invests, under normal circumstances, at least
65% of its total assets in high yield, fixed income securities rated, at the
time of investment, below investment grade. Non-investment grade securities
are securities rated BB, Ba or below by an NRSRO or, if unrated, determined by
the Investment Adviser to be of comparable quality. The Fund may invest in all
types of fixed-income securities, including senior and subordinated corporate
debt obligations (such as bonds, debentures, notes and commercial paper),
convertible and non-convertible corporate debt obligations, loan
participations, custodial receipts, municipal securities and preferred stock.
The Fund may invest up to 25% of its total assets in obligations of domestic
and foreign issuers (including securities of issuers located in countries with
emerging markets and economies) which are denominated in currencies other than
the U.S. dollar. Under normal market conditions, the Fund may invest up to 35%
of its total assets in investment grade fixed income securities, including
U.S. Government Securities, Asset-Backed and Mortgage-Backed Securities and
corporate securities. The Fund may also invest in common stocks, warrants,
rights and other equity securities, but will generally hold such equity
investments only when debt or preferred stock of the issuer of such equity
securities is held by the Fund. A number of investment strategies are used to
seek to achieve the Fund's investment objective, including market sector
selection, determination of yield curve exposure, and issuer selection. In
addition, the Investment Adviser will attempt to take advantage of pricing
inefficiencies in the fixed-income markets.
 
  CREDIT QUALITY. The Fund invests primarily in high yield, fixed income
securities rated below investment grade, including securities of issuers in
default. Non-investment grade securities (commonly known as "junk bonds") tend
to offer higher yields than higher rated securities with similar maturities.
Non-investment grade securities are, however, considered speculative and
generally involve greater price volatility and greater risk of loss of
principal and interest than higher rated securities. See "Description of
Securities." A description of the corporate bond and preferred stock ratings
is contained in Appendix B to the Additional Statement.
 
                                      23
<PAGE>
 
  For your information, set forth below is the average distribution of ratings
for the portfolio securities (including commercial paper and nonconvertible
bonds) held by the Fund during the most recent fiscal year:
 
<TABLE>
<CAPTION>
                                                                   PERCENTAGE OF
                                                                   FUND'S ASSETS
                            CREDIT QUALITY                         -------------
     <S>                                                           <C>
     AAA/Aaa......................................................      1.3%
     AA/Aa........................................................        0%
     A............................................................        0%
     BBB/Baa......................................................      0.3%
     BB/Ba........................................................     13.1%
     Below Ba.....................................................     85.3%
     Not rated....................................................        0%
      Comparable to A.............................................        0%
      Comparable to BBB/Baa.......................................        0%
      Comparable to BB/Ba.........................................        0%
      Comparable to Below Ba......................................        0%
                                                                       -----
                                                                        100%
                                                                       =====
</TABLE>
 
  OTHER. The Fund may employ certain active management techniques to manage
its duration and term structure, to seek to hedge its exposure to foreign
securities and to seek to enhance returns. These techniques include, but are
not limited to, the use of financial futures contracts, option contracts
(including options on futures), forward foreign currency exchange contracts,
currency options and futures, currency, mortgage, credit and interest rate
swaps, and interest rate floors, caps and collars. Currency management
techniques involve risks different from those associated with investing solely
in U.S. dollar-denominated fixed-income securities of U.S. issuers. It is
expected that the Fund will use certain currency techniques to seek to hedge
against currency exchange rate fluctuations or to seek to increase total
return. The Fund may also employ other investment techniques to seek to
enhance returns, such as lending portfolio securities, and entering into
repurchase agreements and other investment practices described under
"Investment Techniques."
 
 
                           DESCRIPTION OF SECURITIES
 
U.S. GOVERNMENT SECURITIES
 
  Each Fund may invest in U.S. Government Securities. Generally, these
securities include U.S. Treasury obligations and obligations issued or
guaranteed by U.S. government agencies, instrumentalities or sponsored
enterprises which are supported by (a) the full faith and credit of the U.S.
Treasury (such as the Government National Mortgage Association ("Ginnie
Mae")), (b) the right of the issuer to borrow from the U.S. Treasury (such as
securities of the Student Loan Marketing Association), (c) the discretionary
authority of the U.S. government to purchase certain obligations of the issuer
(such as the Federal National Mortgage Association ("Fannie Mae") and Federal
Home Loan Mortgage Corporation ("Freddie Mac")), or (d) only the credit of the
issuer. No assurance can be given that the U.S. government will provide
financial support to U.S. government agencies, instrumentalities or sponsored
enterprises in the future.
 
  U.S. Government Securities also include Treasury receipts, zero coupon bonds
and other stripped U.S. Government Securities, where the interest and
principal components of stripped U.S. Government Securities are traded
independently. The most widely recognized program is the Separate Trading of
Registered Interest and Principal of Securities Program.
 
                                      24
<PAGE>
 
MORTGAGE-BACKED SECURITIES
 
  CHARACTERISTICS OF MORTGAGE-BACKED SECURITIES. Mortgage-Backed Securities
represent direct or indirect participations in, or are collateralized by and
payable from, mortgage loans secured by real property. Mortgagors can
generally prepay interest or principal on their mortgage whenever they choose.
Therefore, Mortgage-Backed Securities are often subject to more rapid
repayment than their stated maturity date would indicate as a result of
principal prepayments on the underlying loans. This can result in
significantly greater price and yield volatility than is the case with
traditional fixed-income securities. During periods of declining interest
rates, prepayments can be expected to accelerate, and thus impair a Fund's
ability to reinvest the returns of principal at comparable yields. Conversely,
in a rising interest rate environment, a declining prepayment rate will extend
the average life of many Mortgage-Backed Securities and prevent a Fund from
taking advantage of such higher yields.
 
  FIXED RATE MORTGAGE LOANS. Generally, fixed-rate mortgage loans pay interest
at fixed annual rates and have original terms to maturity ranging from 5 to 40
years. Fixed rate mortgage loans typically provide for monthly payments of
principal and interest in substantially equal installments for the term of the
mortgage note in sufficient amounts to amortize fully principal by maturity,
although certain fixed-rate mortgage loans provide for a large final "balloon"
payment upon maturity.
 
  ADJUSTABLE RATE MORTGAGE LOANS ("ARMS"). The Adjustable Rate Government Fund
will primarily, and the Short Duration Government, Government Income, Core
Fixed Income, Global Income and High Yield Funds may, invest in ARMs, which
are pass-through mortgage securities collateralized by mortgages with
adjustable rather than fixed coupon rates. ARMs generally provide for a fixed
initial mortgage interest rate for a set period. Thereafter, the interest
rates are subject to periodic adjustments based on changes to a designated
benchmark index.
 
  ARMs allow a Fund to participate in increases in interest rates through
periodic increases in the securities' coupon rates. During periods of
declining interest rates, coupon rates may readjust downward resulting in
lower yields to a Fund. Therefore, the value of an ARM is unlikely to rise
during periods of declining interest rates to the same extent as fixed-rate
securities. Interest rate declines may result in accelerated prepayment of
mortgages with the result that proceeds from prepayments will be reinvested at
lower interest rates. During periods of rising interest rates, changes in the
coupon rate will lag behind changes in the market rate. ARMs are also
typically subject to maximum increases and decreases in the interest rate
adjustment which can be made on any one adjustment date, in any one year, or
during the life of the security. In the event of dramatic increases or
decreases in prevailing market interest rates, the value of a Fund's
investments in ARMs may fluctuate more substantially since these limits may
prevent the security from fully adjusting its interest rate to the prevailing
market rates.
 
  U.S. GOVERNMENT GUARANTEED MORTGAGE-BACKED SECURITIES. Certain Mortgage-
Backed Securities are issued or guaranteed by the U.S. government, its
agencies, instrumentalities or sponsored enterprises. Such issuers include,
but are not limited to, Ginnie Mae, Fannie Mae and Freddie Mac. See "U.S.
Government Securities."
 
  PRIVATELY ISSUED MORTGAGE-BACKED SECURITIES. The Government Income, Core
Fixed Income, Global Income and High Yield Funds may invest in Mortgage-Backed
Securities issued or sponsored by non-governmental entities. Privately issued
Mortgage-Backed Securities are generally backed by pools of conventional
(i.e., non-government guaranteed or insured) mortgage loans. Since such
Mortgage-Backed Securities normally are not guaranteed by an entity having the
credit standing of Ginnie Mae, Fannie Mae or
 
                                      25
<PAGE>
 
Freddie Mac, in order to receive a high quality rating from the rating
organizations (i.e., S&P or Moody's), they normally are structured with one or
more types of "credit enhancement."
 
  MULTIPLE CLASS MORTGAGE-BACKED SECURITIES AND COLLATERALIZED MORTGAGE
OBLIGATIONS. The Adjustable Rate Government, Short Duration Government,
Government Income, Core Fixed Income, Global Income and High Yield Funds may
also invest in multiple class securities, including collateralized mortgage
obligations ("CMOs") and Real Estate Mortgage Investment Conduit ("REMIC")
pass-through or participation certificates. CMOs provide an investor with a
specified interest in the cash flow from a pool of underlying mortgages or of
other Mortgage-Backed Securities. CMOs are issued in multiple classes, each
with a specified fixed or floating interest rate and a final scheduled
distribution date. In most cases, payments of principal are applied to the CMO
classes in the order of their respective stated maturities, so that no
principal payments will be made on a CMO class until all other classes having
an earlier stated maturity date are paid in full. A REMIC is a CMO that
qualifies for special tax treatment under the Internal Revenue Code of 1986,
as amended (the "Code"), and invests in certain mortgages principally secured
by interests in real property and other permitted investments. The Funds do
not intend to purchase residual interests in REMICs.
 
  STRIPPED MORTGAGE-BACKED SECURITIES. The Adjustable Rate Government, Short
Duration Government, Government Income, Core Fixed Income, Global Income and
High Yield Funds may invest in Stripped Mortgage-Backed Securities ("SMBS"),
which are derivative multiple class Mortgage-Backed Securities. SMBS are
usually structured with two different classes: one that receives 100% of the
interest payments and the other that receives 100% of the principal payments
from a pool of mortgage loans. If the underlying mortgage loans experience
different than anticipated prepayments of principal, a Fund may fail to recoup
fully its initial investment in these securities. The market value of the
class consisting entirely of principal payments generally is unusually
volatile in response to changes in interest rates. The yields on a class of
SMBS that receives all or most of the interest from mortgage loans are
generally higher than prevailing market yields on other Mortgage-Backed
Securities because their cash flow patterns are more volatile and there is a
greater risk that the initial investment will not be fully recouped. A Fund's
investments in SMBS may require the Fund to sell certain of its portfolio
securities to generate sufficient cash to satisfy certain income distribution
requirements.
 
ASSET-BACKED SECURITIES
 
  The Government Income, Core Fixed Income, Global Income and High Yield Funds
may invest in Asset-Backed Securities. The principal and interest payments on
Asset-Backed Securities are collateralized by pools of assets such as auto
loans, credit card receivables, leases, installment contracts and personal
property. Such asset pools are securitized through the use of special purpose
trusts or corporations. Principal and interest payments may be credit enhanced
by a letter of credit, a pool insurance policy or a senior/subordinated
structure.
 
LOAN PARTICIPATIONS
 
  The High Yield Fund may invest in loan participations. Such loans must be to
issuers in whose obligations the High Yield Fund may invest. A loan
participation is an interest in a loan to a U.S. or foreign company or other
borrower which is administered and sold by a financial intermediary. In a
typical corporate loan syndication, a number of lenders, usually banks (co-
lenders), lend a corporate borrower a specified sum pursuant to the terms and
conditions of a loan agreement. One of the co-lenders usually agrees to act as
the agent bank with respect to the loan.
 
  Participation interests acquired by the High Yield Fund may take the form of
a direct or co-lending relationship with the corporate borrower, an assignment
of an interest in the loan by a co-lender or another
 
                                      26
<PAGE>
 
participant, or a participation in the seller's share of the loan. When the
High Yield Fund acts as co-lender in connection with a participation interest
or when the High Yield Fund acquires certain participation interests, the High
Yield Fund will have direct recourse against the borrower if the borrower
fails to pay scheduled principal and interest. In cases where the High Yield
Fund lacks direct recourse, it will look to the agent bank to enforce
appropriate credit remedies against the borrower. In these cases, the High
Yield Fund may be subject to delays, expenses and risks that are greater than
those that would have been involved if the Fund had purchased a direct
obligation (such as commercial paper) of such borrower. For example, in the
event of the bankruptcy or insolvency of the corporate borrower, a loan
participation may be subject to certain defenses by the borrower as a result
of improper conduct by the agent bank. Moreover, under the terms of the loan
participation, the High Yield Fund may be regarded as a creditor of the agent
bank (rather than of the underlying corporate borrower), so that the High
Yield Fund may also be subject to the risk that the agent bank may become
insolvent. The secondary market, if any, for these loan participations is
limited and any loan participations purchased by the High Yield Fund will be
regarded as illiquid.
 
  For purposes of certain investment limitations pertaining to diversification
of the High Yield Fund's portfolio investments, the issuer of a loan
participation will be the underlying borrower. However, in cases where the
High Yield Fund does not have recourse directly against the borrower, both the
borrower and each agent bank and co-lender interposed between the High Yield
Fund and the borrower will be deemed issuers of a loan participation.
 
MUNICIPAL SECURITIES
 
  GENERAL. Municipal Securities in which the Short Duration Tax-Free and
Municipal Income Funds and, to a limited extent, the Core Fixed Income and
High Yield Funds invest consist of bonds, notes, commercial paper and other
instruments (including participation interests in such securities) issued by
or on behalf of states, territories and possessions of the United States
(including the District of Columbia) and their political subdivisions,
agencies or instrumentalities, the interest on which, in the opinion of bond
counsel for the issuers or counsel selected by the Investment Adviser, is
exempt from regular federal income tax (i.e., excluded from gross income for
federal income tax purposes but not necessarily exempt from federal
alternative minimum tax or from state or local taxes). Such securities may pay
fixed, variable or floating rates of interest. Municipal Securities are often
issued to obtain funds for various public purposes, including the construction
of a wide range of public facilities such as bridges, highways, housing,
hospitals, mass transportation, schools, streets and water and sewer works.
Other public purposes for which Municipal Securities may be issued include
refunding outstanding obligations, obtaining funds for general operating
expenses, and obtaining funds to lend to other public institutions and
facilities. The Core Fixed Income and High Yield Funds may also invest in
taxable Municipal Securities.
 
  PRIVATE ACTIVITY BONDS. Municipal Securities include "private activity
bonds" or industrial development bonds, which are issued by or on behalf of
public authorities to obtain funds for such projects as privately-operated
housing facilities, airport, mass transit or port facilities and sewage
disposal. In addition, proceeds of certain industrial development bonds are
used for constructing, equipping, repairing or improving privately operated
industrial or commercial facilities. The Short Duration Tax-Free and Municipal
Income Funds' distributions attributable to the interest income from private
activity bonds may subject certain investors to the federal alternative
minimum tax.
 
  MUNICIPAL LEASES AND CERTIFICATES OF PARTICIPATION. A municipal lease is an
obligation in the form of a lease or installment purchase which is issued by a
state or local government to acquire equipment and facilities. Certificates of
participation represent undivided interests in municipal leases, installment
purchase agreements or
 
                                      27
<PAGE>
 
other instruments. The primary risk associated with municipal lease
obligations and certificates of participation is that the governmental lessee
will fail to appropriate funds to enable it to meet its payment obligations
under the lease. Although the obligations may be secured by the leased
equipment or facilities, the disposition of the property in the event of non-
appropriation or foreclosure might prove difficult, time consuming and costly,
and result in a delay in recovering or the failure to fully recover a Fund's
original investment. To the extent that a Fund invests in unrated municipal
leases or participates in such leases, the credit quality rating and risk of
cancellation of such unrated leases will be monitored on an ongoing basis.
Certain municipal lease obligations and certificates of participation may be
deemed illiquid for the purpose of a Fund's limitation on investments in
illiquid securities.
 
  PRE-REFUNDED MUNICIPAL SECURITIES. The interest and principal payments on
pre-refunded Municipal Securities are typically paid from the cash flow
generated from an escrow fund consisting of U.S. Government Securities. These
payments have been "pre-refunded" using the escrow fund.
 
  INSURED SECURITIES. "Insured" Municipal Securities are those for which
scheduled payments of interest and principal are guaranteed by a private (non-
governmental) insurance company. The insurance entitles a Fund to receive only
the face or par value of the securities held by the Fund. The insurance does
not guarantee the market value of the Municipal Securities or the net asset
value of a Fund's shares.
 
  AUCTION RATE SECURITIES. Auction rate Municipal Securities permit the holder
to sell the securities in an auction at par value at specified intervals. The
dividend or interest is typically reset by "Dutch" auction in which bids are
made by broker-dealers and other institutions for a certain amount of
securities at a specified minimum yield. The rate set by the auction is the
lowest interest or dividend rate that covers all securities offered for sale.
While this process is designed to permit auction rate securities to be traded
at par value, there is the risk that an auction will fail due to insufficient
demand for the securities. A Fund will take the time remaining until the next
scheduled auction date into account for purposes of determining the
securities' duration.
 
CORPORATE DEBT OBLIGATIONS
 
  The Government Income, Core Fixed Income, Global Income and High Yield Funds
may invest in corporate debt obligations. In addition to obligations of
corporations, corporate debt obligations include securities issued by banks
and other financial institutions. Corporate debt obligations are subject to
the risk of an issuer's inability to meet principal and interest payments on
the obligations.
 
  The Government Income, Core Fixed Income, Global Income and High Yield Funds
may also invest in trust preferred securities. A trust preferred or capital
security is a long dated bond (for example, 30 years) with preferred features.
The preferred features are that payment of interest can be deferred for a
specified period without initiating a default event. From a bondholder's
viewpoint, the securities are senior in claim to standard preferred stock but
junior to other bondholders. From the issuer's viewpoint, the securities are
attractive because their interest is deductible for tax purposes like other
types of debt instruments.
 
CONVERTIBLE SECURITIES
 
  The Core Fixed Income and High Yield Funds may invest in convertible
securities, including debt obligations, and for High Yield Fund preferred
stock, of an issuer convertible at a stated exchange rate into common stock of
the issuer. Convertible securities generally offer lower interest or dividend
yields than non-convertible securities of similar quality. As with all debt
securities, the market value of convertible securities
 
                                      28
<PAGE>
 
tends to decline as interest rates increase and, conversely, to increase as
interest rates decline. However, when the market price of the common stock
underlying a convertible security exceeds the conversion price, the price of
the convertible security tends to reflect the market price of the underlying
common stock. As the market price of the underlying common stock declines, the
convertible security tends to trade increasingly on a yield basis, and thus
may not depreciate to the same extent as the underlying common stock.
Convertible securities in which a Fund invests are subject to the same rating
criteria as its other investments in fixed-income securities.
 
PREFERRED STOCK, WARRANTS AND RIGHTS
 
  The High Yield Fund may invest in preferred stock, warrants and rights.
Preferred stocks are securities that represent an ownership interest providing
the holder with claims on the issuer's earnings and assets before common stock
owners but after bond owners. Unlike debt securities, the obligations of an
issuer of preferred stock, including dividend and other payment obligations,
may not typically be accelerated by the holders of such preferred stock on the
occurrence of an event of default (such as a covenant default or filing of a
bankruptcy petition) or other non-compliance by the issuer with the terms of
the preferred stock. Often, however, on the occurrence of any such event of
default or non-compliance by the issuer, preferred stockholders will be
entitled to gain representation on the issuer's board of directors or increase
their existing board representation. In addition, preferred stockholders may
be granted voting rights with respect to certain issues on the occurrence of
any event of default.
 
  Warrants and other rights are options to buy a stated number of shares of
common stock at a specified price at any time during the life of the warrant.
The holders of warrants and rights have no voting rights, receive no dividends
and have no rights with respect to the assets of the issuer.
 
FOREIGN INVESTMENTS
 
  FOREIGN SECURITIES. The Global Income Fund will, and the Core Fixed Income
and High Yield Funds may, invest in fixed-income securities of foreign issuers
denominated in any currency. However, the Core Fixed Income and High Yield
Funds will limit their investments in non-U.S. dollar-denominated fixed-income
securities to 25% of their total assets. Investment in foreign securities may
offer potential benefits that are not available from investing exclusively in
U.S. dollar-denominated domestic issues. Foreign countries may have economic
policies or business cycles different from those of the U.S. and markets for
foreign fixed-income securities do not necessarily move in a manner parallel
to U.S. markets.
 
  Investing in the securities of foreign issuers involves risks that are not
typically associated with investing in fixed-income securities of domestic
issuers quoted in U.S. dollars. Such investments may be affected by changes in
currency rates, changes in foreign or U.S. laws or restrictions applicable to
such investments and in exchange control regulations (e.g., currency
blockage). A decline in the exchange rate of the currency (i.e., weakening of
the currency against the U.S. dollar) in which a portfolio security is quoted
or denominated relative to the U.S. dollar would reduce the value of the
portfolio security. In addition, if the currency in which a Fund receives
dividends, interest or other payments declines in value against the U.S.
dollar before such income is distributed as dividends to shareholders or
converted to U.S. dollars, the Fund may have to sell portfolio securities to
obtain sufficient cash to pay such dividends. The expected introduction of a
single currency, the euro, on January 1, 1999, for participating European
nations in the Economic and Monetary Union "EU" presents unique uncertainties,
including whether the payment and operational systems of banks and other
financial institutions will be ready by the scheduled launch date; the
creation of suitable clearing and payment systems for the new currency; the
legal treatment of certain outstanding financial contracts after January 1,
1999, that refer to existing
 
                                      29
<PAGE>
 
currencies rather than the euro; the establishment and maintenance of exchange
rates for currencies being converted into the euro and the euro; the
fluctuation of the euro relative to non-euro currencies during the transition
period from January 1, 1999 to December 31, 2000 and beyond; whether the
interest rate, tax and labor regimes of European countries participating in
the euro will converge over time; and whether the conversion of the currencies
of other EU countries such as the United Kingdom, Denmark and Greece into the
euro and the admission of other non-EU countries such as Poland, Latvia and
Lithuania as members of the EU may have an impact on the euro. These or other
factors, including political and economic risks, could cause market
disruptions before or after the introduction of the euro, and could adversely
affect the value of securities and foreign currencies held by the Funds. In
addition, clearance and settlement procedures may be different in foreign
countries and, in certain markets, such procedures have been unable to keep
pace with the volume of securities transactions, making it more difficult to
conduct such transactions.
 
  The Core Fixed Income, Global Income and High Yield Funds may invest in an
issuer domiciled in one country yet issuing the security in the currency of
another country. The Funds may also invest in debt securities denominated in
the European Currency Unit (" ECU"), which is a "basket" consisting of
specified amounts in the currencies of certain of the twelve member states of
the European Community. The specific amounts of currencies comprising the ECU
may be adjusted by the Council of Ministers of the European Community from
time to time to reflect changes in relative values of the underlying
currencies. In addition, the Funds may invest in securities denominated in
other currency "baskets."
 
  Foreign issuers are not generally subject to uniform accounting, auditing
and financial reporting standards comparable to those applicable to U.S.
issuers. There may be less publicly available information about a foreign
issuer than about a U.S. issuer. In addition, there is generally less
government regulation of foreign markets, companies and securities dealers
than in the U.S. Foreign securities markets may have substantially less volume
than U.S. securities markets and securities of many foreign issuers may be
less liquid and more volatile than securities of comparable domestic issuers.
Furthermore, with respect to certain foreign countries, there is a possibility
of nationalization, expropriation or confiscatory taxation, imposition of
withholding or other taxes on dividend or interest payments (or, in some
cases, capital gains), limitations on the removal of funds or other assets of
a Fund, political or social instability or diplomatic developments which could
affect investments in those countries.
 
  FOREIGN GOVERNMENT SECURITIES. The Core Fixed Income, Global Income and High
Yield Funds may invest in debt obligations of foreign governments and
governmental agencies, including those of emerging countries. Investment in
sovereign debt obligations involves special risks not present in debt
obligations of corporate issuers. The issuer of the debt or the governmental
authorities that control the repayment of the debt may be unable or unwilling
to repay principal or interest when due in accordance with the terms of such
debt, and a Fund may have limited recourse in the event of a default. Periods
of economic uncertainty may result in volatility of market prices of sovereign
debt, and in turn a Fund's net asset value, to a greater extent than the
volatility inherent in debt obligations of U.S. issuers. A sovereign debtor's
willingness or ability to repay principal and pay interest in a timely manner
may be affected by, among other factors, its cash flow situation, the extent
of its foreign currency reserves, the availability of sufficient foreign
exchange on the date a payment is due, the relative size of the debt service
burden to the economy as a whole, the sovereign debtor's policy toward
international lenders and the political constraints to which a sovereign
debtor may be subject.
 
  EMERGING MARKETS. The Core Fixed Income and Global Income Funds may invest
up to 10% and the High Yield Fund may invest up to 25% of their total assets
in securities of issuers located in countries with emerging economies or
securities markets ("emerging markets"). Political and economic structures in
many emerging markets may be undergoing significant evolution and rapid
development, and emerging markets may lack the
 
                                      30
<PAGE>
 
social, political and economic stability characteristics of more developed
countries. As a result, the risks relating to investments in foreign
securities described above, including the possibility of nationalization,
expropriation and confiscatory taxation, may be heightened. In addition,
unanticipated political and social developments may affect the value of a
Fund's investments in emerging markets and the availability to the Fund of
additional investments in such countries. The small size and inexperience of the
securities markets in certain emerging markets and the limited volume of trading
in securities in those countries may make a Fund's investments in such countries
less liquid and more volatile than investments in countries with more developed
securities markets (such as the U.S., Japan and most Western European
countries). See the Additional Statement for further information regarding a
Fund's investments in emerging markets.
 
  FOREIGN CURRENCY TRANSACTIONS. Because investment in foreign issuers by the
Core Fixed Income, Global Income and High Yield Funds will usually involve
currencies of foreign countries, and because the Funds may have currency
exposure independent of their securities positions, the value of the assets of
a Fund as measured in U.S. dollars will be affected by changes in foreign
currency exchange rates. A Fund may, to the extent it invests in foreign
securities, purchase or sell foreign currencies on a spot basis and may also
purchase or sell forward foreign currency exchange contracts for hedging
purposes and to seek to protect against anticipated changes in future foreign
currency exchange rates. In addition, a Fund may enter into such contracts to
seek to increase total return when the Investment Adviser anticipates that the
foreign currency will appreciate or depreciate in value, but securities
denominated or quoted in that currency do not present attractive investment
opportunities and are not held in the Fund's portfolio. When entered into to
seek to increase total return, forward foreign currency exchange contracts are
considered speculative. The Funds may also engage in cross-hedging by using
forward contracts in a currency different from that in which the hedged
security is denominated or quoted if the Investment Advisers determine that
there is a pattern of correlation between the two currencies. If a Fund enters
into a forward foreign currency exchange contract to buy foreign currency for
any purpose or to sell foreign currency to seek to increase total return, the
Fund will be required to place cash or liquid assets in a segregated account
with the Fund's custodian in an amount equal to the value of the Fund's total
assets committed to the consummation of the forward contract, or to otherwise
cover its position in a manner permitted by the SEC. A Fund will incur costs
in connection with conversions between various currencies. A Fund may hold
foreign currency received in connection with investments in foreign securities
when, in the judgment of the Investment Adviser, it would be beneficial to
convert such currency into U.S. dollars at a later date, based on anticipated
changes in the relevant exchange rate.
 
  Currency exchange rates may fluctuate significantly over short periods of
time causing, along with other factors, a Fund's net asset value to fluctuate.
Currency exchange rates generally are determined by the forces of supply and
demand in the foreign exchange markets and the relative merits of investments
in different countries, actual or anticipated changes in interest rates and
other complex factors, as seen from an international perspective. Currency
exchange rates also can be affected unpredictably by the intervention of U.S.
or foreign governments or central banks, or the failure to intervene, or by
currency controls or political developments in the U.S. or abroad. To the
extent that a substantial portion of a Fund's total assets, adjusted to
reflect the Fund's net position after giving effect to currency transactions,
is denominated or quoted in the currencies of foreign countries, the Fund will
be more susceptible to the risk of adverse economic and political developments
within those countries.
 
  The market in forward foreign currency exchange contracts, currency swaps
and other privately negotiated currency instruments offers less protection
against defaults by the other party to such instruments than is available for
currency instruments traded on an exchange. Such contracts are subject to the
risk that the
 
                                      31
<PAGE>
 
counterparty to the contract will default on its obligations. Since these
contracts are not guaranteed by an exchange or clearinghouse, a default on a
contract would deprive a Fund of unrealized profits, transaction costs or the
benefits of a currency hedge or force a Fund to cover its purchase or sale
commitments, if any, at the current market price. A Fund will not enter into
forward foreign currency exchange contracts, currency swaps or other privately
negotiated currency instruments unless the credit quality of the unsecured
senior debt or the claims-paying ability of the counterparty is considered to
be investment grade by the Investment Adviser.
 
  The Core Fixed Income, Global Income and High Yield Funds' use of foreign
currency management techniques in emerging markets may be limited. Due to the
limited market for these instruments in emerging markets, the Investment
Adviser does not currently anticipate that a significant portion of the Funds'
currency exposure in emerging markets, if any, will be covered by such
instruments. For a discussion of such instruments and the risks associated
with their use, see "Investment Objectives and Policies" in the Additional
Statement.
 
STRUCTURED SECURITIES
 
  The Core Fixed Income, Global Income and High Yield Funds may invest in
structured securities. The value of the principal of and/or interest on such
securities is determined by reference to changes in the value of specific
currencies, interest rates, commodities, indices or other financial indicators
(the "Reference") or the relative change in two or more References. The
interest rate or the principal amount payable upon maturity or redemption may
be increased or decreased depending upon changes in the applicable Reference.
The terms of the structured securities may provide that in certain
circumstances no principal is due at maturity and, therefore, result in the
loss of a Fund's investment. Structured securities may be positively or
negatively indexed, so that appreciation of the Reference may produce an
increase or decrease in the interest rate or value of the security at
maturity. In addition, changes in the interest rates or the value of the
security at maturity may be a multiple of changes in the value of the
Reference. Consequently, structured securities may entail a greater degree of
market risk than other types of fixed-income securities. Structured securities
may also be more volatile, less liquid and more difficult to accurately price
than less complex securities.
 
ZERO COUPON, DEFERRED INTEREST, PAY-IN-KIND AND CAPITAL APPRECIATION BONDS
 
  Each Fund may invest in zero coupon, deferred interest and capital
appreciation bonds. These are securities issued at a discount from their face
value because interest payments are typically postponed until maturity. The
amount of the discount rate varies depending on factors including the time
remaining until maturity, prevailing interest rates, the security's liquidity
and the issuer's credit quality. These securities also may take the form of
debt securities that have been stripped of their interest payments. Each Fund
may also invest in pay-in-kind securities which are securities that have
interest payable by the delivery of additional securities. A portion of the
discount with respect to stripped tax-exempt securities or their coupons may
be taxable. The market prices of zero coupon, deferred interest, pay-in-kind
and capital appreciation bonds generally are more volatile than the market
prices of interest-bearing securities and are likely to respond to a greater
degree to changes in interest rates than interest-bearing securities having
similar maturities and credit quality. A Fund's investments in zero coupon,
deferred interest, pay-in-kind and capital appreciation bonds may require the
Fund to sell certain of its portfolio securities to generate sufficient cash
to satisfy certain income distribution requirements. See "Taxation" in the
Additional Statement.
 
                                      32
<PAGE>
 
 
                                 RISK FACTORS
 
  INTEREST RATE RISK. When interest rates decline, the market value of fixed
income securities tends to increase. Conversely, when interest rates increase,
the market value of fixed-income securities tends to decline. Volatility of a
security's market value will differ depending upon the security's duration,
the issuer and the type of instrument.
 
  DEFAULT RISK/CREDIT RISK. Investments in fixed-income securities are subject
to the risk that the issuer could default on its obligations and a Fund could
sustain losses on such investments. A default could impact both interest and
principal payments.
 
  CALL RISK AND EXTENSION RISK. Fixed-income securities may be subject to both
call risk and extension risk. Call risk (i.e., where the issuer exercises its
right to pay principal on an obligation earlier than scheduled) causes cash
flow to be returned earlier than expected. Call risk typically results when
interest rates have declined.Under such circumstances, a Fund may be unable to
recoup all of its initial investment and will also suffer from having to
reinvest in lower yielding securities. Extension risk (i.e., where the issuer
exercises its right to pay principal on an obligation later than scheduled)
causes cash flows to be returned later than expected. Extension risk typically
results when interest rates have increased. Under such circumstances, a Fund
will suffer from the inability to invest in higher yielding securities.
Certain types of U.S. Government, Asset-Backed, corporate, foreign, Mortgage-
Backed and Municipal Securities have call and/or extension risk.
 
  The investment characteristics of Mortgage-Backed Securities and Asset-
Backed Securities differ from those of traditional fixed-income securities
because they generally have both call risk (also known as prepayment risk) and
extension risk. Homeowners have the option to prepay their mortgage.
Therefore, the duration of a security backed by home mortgages can either
shorten (call risk) or lengthen (extension risk). Investors are exposed to the
fluctuating principal and interest payments associated with such securities.
In general, if interest rates on new mortgage loans fall sufficiently below
the interest rates on existing outstanding mortgage loans, the rate of
prepayment would be expected to increase. Conversely, if mortgage loan
interest rates rise above the interest rates on existing outstanding mortgage
loans, the rate of prepayment would be expected to decrease.
 
  ARMs also have the risk of prepayments, which will have a greater impact on
the Adjustable Rate Government Fund. The rate of principal prepayments with
respect to ARMs has fluctuated in recent years. As with fixed rate mortgage
loans, ARMs may be subject to a greater rate of principal repayments in a
declining interest rate environment. For example, if prevailing interest rates
fall significantly, ARMs could be subject to higher prepayment rates (than if
prevailing interest rates remain constant or increase) because the
availability of low fixed rate mortgages may encourage mortgagors to refinance
their ARMs to "lock-in" a fixed-rate mortgage. Conversely, if prevailing
interest rates rise significantly, ARMs may prepay more slowly. As with fixed-
rate mortgages, ARM prepayment rates vary in both stable and changing interest
rate environments. There are certain ARMs where the homeowner's payments do
not fully cover interest, so the principal balance increases over time. These
"negative amortizing" ARMs may be subject to greater default risk.
 
  DERIVATIVE MORTGAGE-BACKED SECURITIES. Because derivative Mortgage-Backed
Securities (such as principal-only (POs), interest-only (IOs) or inverse
floating-rate securities) are more exposed to mortgage prepayments, they
generally involve a greater amount of risk. Small changes in prepayments can
significantly impact the cash flow and the market value of these securities.
The risk of faster than anticipated prepayments generally adversely affects
IOs, super floaters and premium priced Mortgage-Backed Securities. The risk of
 
                                      33
<PAGE>
 
slower than anticipated prepayments generally adversely affects POs, floating-
rate securities subject to interest rate caps, support tranches and discount
priced Mortgage-Backed Securities. In addition, particular derivative
securities may be leveraged such that their exposure (i.e., price sensitivity)
to interest rate and/or prepayment risk is magnified.
 
  RISKS OF DERIVATIVE TRANSACTIONS. A Fund's transactions, if any, in options,
futures, options on futures, swaps, interest rate caps, floors and collars,
structured securities, inverse floating-rate securities and currency
transactions involve certain risks, including a possible lack of correlation
between changes in the value of hedging instruments and the portfolio assets
being hedged, the potential illiquidity of the markets for derivative
instruments, the risks arising from margin requirements and related leverage
factors associated with such transactions. The use of these management
techniques to seek to increase total return may be regarded as a speculative
practice and involves the risk of loss if the Investment Adviser is incorrect
in its expectation of fluctuations in securities prices, interest rates or
currency prices. A Fund's use of certain derivative transactions may be
limited by the requirements of the Internal Revenue Code of 1986, as amended
(the "Code") for qualification as a regulated investment company.
 
  TAX RISK OF MUNICIPAL SECURITIES. The yields and market values of Municipal
Securities may be more adversely impacted by changes in tax rates and policies
than taxable fixed-income securities. Because interest income from Municipal
Securities is normally not subject to regular federal income taxation, the
attractiveness of Municipal Securities in relation to other investment
alternatives is affected by changes in federal income tax rates applicable to,
or the continuing federal income tax-exempt status of, such interest income.
Any proposed or actual changes in such rates or exempt status, therefore, can
significantly affect the demand for and supply, liquidity and marketability of
Municipal Securities, which could in turn affect a Fund's ability to acquire
and dispose of Municipal Securities at desirable yield and price levels.
 
  RISKS OF INVESTING IN NON-INVESTMENT GRADE FIXED-INCOME SECURITIES. Non-
investment grade fixed- income securities are considered predominantly
speculative by traditional investment standards. In some cases, these
obligations may be highly speculative and have poor prospects for reaching
investment grade standing. Non-investment grade fixed-income securities and
unrated securities of comparable credit quality (commonly known as "junk
bonds") are subject to the increased risk of an issuer's inability to meet
principal and interest obligations. These securities, also referred to as high
yield securities, may be subject to greater price volatility due to such
factors as specific corporate developments, interest rate sensitivity,
negative perceptions of the junk bond markets generally and less secondary
market liquidity.
 
  Non-investment grade fixed-income securities are often issued in connection
with a corporate reorganization or restructuring or as part of a merger,
acquisition, takeover or similar event. They are also issued by less
established companies seeking to expand. Such issuers are often highly
leveraged and generally less able than more established or less leveraged
entities to make scheduled payments of principal and interest in the event of
adverse developments or business conditions.
 
  The market value of non-investment grade fixed-income securities tends to
reflect individual corporate developments to a greater extent than that of
higher rated securities which react primarily to fluctuations in the general
level of interest rates. As a result, a Fund's ability to achieve its
investment objectives may depend to a greater extent on the Investment
Adviser's judgment concerning the creditworthiness of issuers than funds which
invest in higher-rated securities. Issuers of non-investment grade fixed-
income securities may not be able to make use of more traditional methods of
financing and their ability to service debt obligations may be more adversely
affected than issuers of higher-rated securities by economic downturns,
specific corporate developments or the
 
                                      34
<PAGE>
 
issuer's inability to meet specific projected business forecasts. Negative
publicity about the junk bond market and investor perceptions regarding lower
rated securities, whether or not based on fundamental analysis, may depress
the prices for such securities.
 
  A holder's risk of loss from default is significantly greater for non-
investment grade fixed-income securities than is the case for holders of other
debt securities because such non-investment grade securities are generally
unsecured and are often subordinated to the rights of other creditors of the
issuers of such securities. Investment by a Fund in defaulted securities poses
additional risk of loss should nonpayment of principal and interest continue
in respect of such securities. Even if such securities are held to maturity,
recovery by a Fund of its initial investment and any anticipated income or
appreciation is uncertain.
 
  The secondary market for non-investment grade fixed-income securities is
concentrated in relatively few market makers and is dominated by institutional
investors, including mutual funds, insurance companies and other financial
institutions. Accordingly, the secondary market for such securities is not as
liquid as, and is more volatile than, the secondary market for higher-rated
securities. In addition, market trading volume for high yield fixed-income
securities is generally lower and the secondary market for such securities
could contract under adverse market or economic conditions, independent of any
specific adverse changes in the condition of a particular issuer. These
factors may have an adverse effect on the market price and a Fund's ability to
dispose of particular portfolio investments. A less liquid secondary market
also may make it more difficult for a Fund to obtain precise valuations of the
high yield securities in its portfolio.
 
  Credit ratings issued by credit rating agencies are designed to evaluate the
safety of principal and interest payments of rated securities. They do not,
however, evaluate the market value risk of non-investment grade securities
and, therefore, may not fully reflect the true risks of an investment. In
addition, credit rating agencies may or may not make timely changes in a
rating to reflect changes in the economy or in the conditions of the issuer
that affect the market value of the security. Consequently, credit ratings are
used only as a preliminary indicator of investment quality. Investments in
non-investment grade and comparable unrated obligations will be more dependent
on the Investment Adviser's credit analysis than would be the case with
investments in investment-grade debt obligations. The Investment Adviser
employs its own credit research and analysis, which includes a study of
existing debt, capital structure, ability to service debt and to pay
dividends, the issuer's sensitivity to economic conditions, its operating
history and the current trend of earnings. The Investment Adviser continually
monitors the investments in a Fund's portfolio and evaluates whether to
dispose of or to retain non-investment grade and comparable unrated securities
whose credit ratings or credit quality may have changed.
 
  OTHER RISKS. Floating rate derivative debt securities present more complex
types of interest rate risks. For example, range floaters are subject to the
risk that the coupon will be reduced below market rates if a designated
interest rate floats outside of a specified interest rate band or collar. Dual
index or yield curve floaters are subject to lower prices in the event of an
unfavorable change in the spread between two designated interest rates.
 
  Asset-Backed Securities present certain credit risks that are not presented
by Mortgage-Backed Securities because Asset-Backed Securities generally do not
have the benefit of a security interest in collateral that is comparable to
mortgage assets. There is the possibility that, in some cases, recoveries on
repossessed collateral may not be available to support payments on these
securities.
 
  FOREIGN RISKS. See "Foreign Securities" for a description of the risks of
investing in foreign securities and currencies.
 
                                      35
<PAGE>
 
 
                             INVESTMENT TECHNIQUES
 
  MORTGAGE DOLLAR ROLLS. The Adjustable Rate Government, Short Duration
Government, Government Income, Core Fixed Income and Global Income Funds may
enter into mortgage "dollar rolls" in which a Fund sells securities for
delivery in the current month and simultaneously contracts with the same
counterparty to repurchase substantially similar (same type, coupon and
maturity) but not identical securities on a specified future date. During the
roll period, the Fund loses the right to receive principal and interest paid
on the securities sold. However, the Fund would benefit to the extent of any
difference between the price received for the securities sold and the lower
forward price for the future purchase or fee income plus the interest earned
on the cash proceeds of the securities sold until the settlement date for the
forward purchase. Unless such benefits exceed the income, capital appreciation
and gain or loss due to mortgage prepayments that would have been realized on
the securities sold as part of the mortgage dollar roll, the use of this
technique will diminish the investment performance of the Fund . Successful
use of mortgage dollar rolls depends upon the Investment Adviser's ability to
predict correctly interest rates and mortgage prepayments. There is no
assurance that mortgage dollar rolls can be successfully employed. The Fund
will hold and maintain in a segregated account until the settlement date cash
or liquid assets in an amount equal to the forward purchase price. For
financial reporting and tax purposes, each Fund treats mortgage dollar rolls
as two separate transactions; one involving the purchase of a security and a
separate transaction involving a sale. The Funds do not currently intend to
enter into mortgage dollar rolls that are accounted for as a financing.
 
  OPTIONS ON SECURITIES AND SECURITIES INDICES. Each Fund may write (sell)
covered call and put options and purchase put and call options on any
securities in which it may invest or on any securities index comprised of
securities in which it may invest. The writing and purchase of options is a
highly specialized activity which involves investment techniques and risks
different from those associated with ordinary portfolio securities
transactions. The use of options to seek to increase total return involves the
risk of loss if the Investment Adviser is incorrect in its expectation of
fluctuations in securities prices or interest rates. The successful use of
options for hedging purposes also depends in part on the ability of the
Investment Adviser to manage future price fluctuations and the degree of
correlation between the options and securities markets. If the Investment
Adviser is incorrect in its expectation of changes in securities prices or
determination of the correlation between the securities indices on which
options are written and purchased and the securities in a Fund's investment
portfolio, the investment performance of the Fund will be less favorable than
it would have been in the absence of such options transactions. The writing of
options could increase a Fund's portfolio turnover rate and, therefore,
associated brokerage commissions or spreads.
 
  OPTIONS ON FOREIGN CURRENCIES. The Core Fixed Income, Global Income and High
Yield Funds may, to the extent they invest in foreign securities, purchase and
sell (write) put and call options on foreign currencies for the purpose of
protecting against declines in the U.S. dollar value of foreign portfolio
securities and against increases in the U.S. dollar cost of foreign securities
to be acquired. In addition, the Core Fixed Income, Global Income and High
Yield Funds may use options on currency to cross-hedge, which involves writing
or purchasing options on one currency to hedge against changes in exchange
rates for a different currency, if there is a pattern of correlation between
the two currencies. As with other kinds of option transactions, however, the
writing of an option on foreign currency will constitute only a partial hedge,
up to the amount of the premium received. If an option that a Fund has written
is exercised, the Fund could be required to purchase or sell foreign
currencies at disadvantageous exchange rates, thereby incurring losses. The
purchase of an option on foreign currency may constitute an effective hedge
against exchange rate fluctuations; however, in the event of exchange rate
 
                                      36
<PAGE>
 
movements adverse to a Fund's position, the Fund may forfeit the entire amount
of the premium plus related transaction costs. In addition to purchasing put
and call options for hedging purposes, a Fund may purchase call or put options
on currency to seek to increase total return when the Investment Adviser
anticipates that the currency will appreciate or depreciate in value, but the
securities quoted or denominated in that currency do not present attractive
investment opportunities and are not held in the Fund's portfolio. When
purchased or sold to seek to increase total return, options on currencies are
considered speculative. Options on foreign currencies to be written or
purchased by the Funds will be traded on U.S. and foreign exchanges or over-
the-counter.
 
  FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS. To seek to increase
total return or to hedge against changes in interest rates or securities
prices, or in the case of the Core Fixed Income, Global Income and High Yield
Funds, currency exchange rates, a Fund may purchase and sell various kinds of
futures contracts, and purchase and write call and put options on any of such
futures contracts. Each Fund may also enter into closing purchase and sale
transactions with respect to any such contracts and options. The futures
contracts may be based on various securities (such as U.S. Government
Securities), foreign currencies, in the case of the Core Fixed Income, Global
Income and High Yield Funds, securities indices and other financial
instruments and indices. A Fund will engage in futures and related options
transactions only for bona fide hedging purposes as defined in regulations of
the Commodity Futures Trading Commission or to seek to increase total return
to the extent permitted by such regulations. A Fund may not purchase or sell
futures contracts or purchase or sell related options to seek to increase
total return, except for closing purchase or sale transactions, if immediately
thereafter the sum of the amount of initial margin deposits and premiums paid
on a Fund's outstanding positions in futures and related options entered into
for the purpose of seeking to increase total return would exceed 5% of the
market value of a Fund's net assets. These transactions involve brokerage
costs, require margin deposits and, in the case of contracts and options
obligating a Fund to purchase securities or currencies, require the Fund to
segregate and maintain cash or liquid assets with a value equal to the amount
of the Fund's obligations or to otherwise cover the obligations in a manner
permitted by the SEC.
 
  While transactions in futures contracts and options on futures may reduce
certain risks, such transactions themselves entail certain other risks. See
"Investment Techniques--Futures Contracts and Options on Futures Contracts" in
the Additional Statement. Thus, while a Fund may benefit from the use of
futures and options on futures, unanticipated changes in interest rates,
securities prices or currency exchange rates may result in a poorer overall
performance than if the Fund had not entered into any futures contracts or
options transactions. Because perfect correlation between a futures position
and portfolio position that is intended to be protected is impossible to
achieve, the desired protection may not be obtained and a Fund may be exposed
to risk of loss. The loss incurred by a Fund in entering into futures
contracts and in writing call options on futures is potentially unlimited and
may exceed the amount of the premium received. Futures markets are highly
volatile and the use of futures may increase the volatility of a Fund's net
asset value. The profitability of a Fund's trading in futures to seek to
increase total return depends upon the ability of the Investment Adviser to
analyze correctly the futures markets. In addition, because of the low margin
deposits normally required in futures trading, a relatively small price
movement in a futures contract may result in substantial losses to a Fund.
Further, futures contracts and options on futures may be illiquid, and
exchanges may limit fluctuations in futures contract prices during a single
day.
 
  CURRENCY SWAPS. The Core Fixed Income, Global Income and High Yield Funds
may enter into currency swaps for hedging purposes or to seek to increase
total return. Currency swaps involve the exchange by a Fund with another party
of their respective rights to make or receive payments in specified
currencies. Currency swaps usually involve the delivery of a gross payment
stream in one designated currency in exchange for the gross payment stream in
another designated currency. Therefore, the entire payment stream under a
currency swap is
 
                                      37
<PAGE>
 
subject to the risk that the other party to the swap will default on its
contractual delivery obligations. A Fund will not enter into swap transactions
unless the unsecured commercial paper, senior debt or claims-paying ability of
the other party thereto is rated investment grade by S&P or Moody's, or, if
unrated by such rating organizations, determined to be of comparable quality
by the Investment Adviser. The use of currency swaps is a highly specialized
activity which involves investment techniques and risks different from those
associated with ordinary portfolio securities transactions. If the Investment
Adviser is incorrect in its forecasts of currency exchange rates, the
investment performance of a Fund would be less favorable than it would have
been if this investment technique were not used.
 
  WHEN-ISSUED SECURITIES AND FORWARD COMMITMENTS. Each Fund may purchase when-
issued securities. When-issued transactions arise when securities are
purchased by a Fund with payment and delivery taking place in the future in
order to secure what is considered to be an advantageous price and yield to
the Fund at the time of entering into the transaction. Each Fund may also
purchase or sell securities on a forward commitment basis; that is, make
contracts to purchase or sell securities for a fixed price at a future date
beyond the customary three-day settlement. The purchase of securities on a
when-issued or forward commitment basis involves a risk of loss if the value
of the security to be purchased declines prior to the settlement date.
Conversely, securities sold on a forward commitment basis involve the risk
that the value of the securities to be sold may increase prior to the
settlement date. Although a Fund would generally purchase securities on a
when-issued or forward commitment basis with the intention of acquiring
securities for its portfolio, a Fund may dispose of when-issued securities or
forward commitments prior to settlement if the Investment Adviser deems it
appropriate to do so. A Fund is required to hold and maintain in a segregated
account with the Fund's custodian until three days prior to settlement date,
cash or liquid assets in an amount sufficient to meet the purchase price.
Alternatively, each Fund may enter into offsetting contracts for the forward
sale of other securities that it owns.
 
  ILLIQUID AND RESTRICTED SECURITIES. A Fund may not invest more than 15% of
its net assets in illiquid investments, which include securities (both foreign
and domestic) that are not readily marketable, certain SMBS, certain municipal
leases and participation interests, repurchase agreements maturing in more
than seven days, time deposits with a notice or demand period of more than
seven days, certain over-the-counter options and certain restricted
securities, unless it is determined, based upon the continuing review of the
trading markets for a specific restricted security, that such restricted
security is eligible for resale under Rule 144A under the Securities Act of
1933 and, therefore, is liquid. The Trustees have adopted guidelines under
which the Investment Adviser determines and monitors the liquidity of
portfolio securities subject to the oversight of the Trustees. Investing in
restricted securities eligible for resale pursuant to Rule 144A may decrease
the liquidity in a Fund to the extent that qualified institutional buyers
become for a time uninterested in purchasing these restricted securities. The
purchase price and subsequent valuation of restricted and illiquid securities
normally reflect a discount, which may be significant, from the market price
of comparable securities for which a liquid market exists.
 
  REPURCHASE AGREEMENTS. Each Fund may enter into repurchase agreements with
dealers in U.S. Government Securities and member banks of the Federal Reserve
System which furnish collateral at least equal in value or market price to the
amount of their repurchase obligation. The Core Fixed Income, Global Income
and High Yield Funds may also enter into repurchase agreements involving
certain foreign government securities. If the other party or "seller"
defaults, a Fund might suffer a loss to the extent that the proceeds from the
sale of the underlying securities and other collateral held by the Fund in
connection with the related repurchase agreement are less than the repurchase
price. In addition, in the event of bankruptcy of the seller or failure of the
seller to repurchase the securities as agreed, a Fund could suffer losses,
including loss of interest on or principal of the security and costs
associated with delay and enforcement of the repurchase agreement. The
 
                                      38
<PAGE>
 
Trustees have reviewed and approved certain counterparties whom they believe
to be creditworthy and have authorized the Funds to enter into repurchase
agreements with such counterparties. In addition, each Fund, together with
other registered investment companies having management agreements with the
Investment Adviser, may transfer uninvested cash balances into a single joint
account, the daily aggregate balance of which will be invested in one or more
repurchase agreements.
 
  TEMPORARY INVESTMENTS. Each Fund may, for temporary defensive purposes,
invest up to 100% of its total assets in (i) U. S. Government Securities or
(ii) repurchase agreements collateralized by U.S. Government Securities. The
Short Duration Tax-Free and Municipal Income Funds may for temporary defensive
purposes depart from their stated investment objectives and invest more than
20% of their respective net assets in taxable investments. The High Yield Fund
may for temporary defensive purposes invest in investment grade securities.
 
MISCELLANEOUS TECHNIQUES
 
  In addition to the techniques and investments described above, each Fund
may, with respect to no more than 5% of its net assets, engage in the
following techniques and investments: (i) portfolio securities lending, (ii)
mortgage swaps (other than Short Duration Tax-Free and Municipal Income
Funds), interest rate swaps, caps, floors and collars and credit swaps, (iii)
inverse floating rate securities, (iv) yield curve options, (v) other
investment companies, (vi) custodial receipts, (vii) with respect to the Short
Duration Tax-Free and Municipal Income Funds, tender option bonds and standby
commitments and (viii) reverse repurchase agreements for investment purposes.
 
  In addition, each Fund may borrow up to 33 1/3% of its total assets from
banks for temporary or emergency purposes. A Fund may not make additional
investments if borrowings (excluding covered mortgage dollar rolls) exceed 5%
of its total assets. For more information, see the Additional Statement.
 
 
                            INVESTMENT RESTRICTIONS
 
  Each Fund is subject to certain investment restrictions that are described
in detail under "Investment Restrictions" in the Additional Statement.
Fundamental investment restrictions of a Fund cannot be changed without
approval of a majority of the outstanding shares of that Fund as defined in
the Additional Statement. Each Fund's investment objectives and all policies
not specifically designated as fundamental are non-fundamental and may be
changed without shareholder approval. If there is a change in a Fund's
investment objectives, shareholders should consider whether that Fund still
remains an appropriate investment in light of their then current financial
positions and needs.
 
  The Short Duration Tax-Free and Municipal Income Funds' policies to invest,
under normal market conditions, at least 80% of their respective net assets in
Municipal Securities, the interest on which is exempt from regular federal
income tax, is fundamental and may not be changed without shareholder
approval. For more information on a Fund's investment restrictions, an
investor should obtain the Additional Statement.
 
  NON-DIVERSIFIED STATUS. Since the Global Income Fund is "non-diversified"
under the Act, it is subject only to certain federal tax diversification
requirements. Under federal tax laws, the Global Income Fund may, with respect
to 50% of its total assets, invest up to 25% of its total assets in the
securities of any issuer (except
 
                                      39
<PAGE>
 
that this limitation does not apply to U.S. Government Securities). With
respect to the remaining 50% of the Fund's total assets, (1) the Fund may not
invest more than 5% of its total assets in the securities of any one issuer
(other than the U.S. Government), and (2) the Fund may not acquire more than
10% of the outstanding voting securities of any one issuer. These tests apply
at the end of each quarter of its taxable year and are subject to certain
conditions and limitations under the Code. Since the Global Income Fund is not
diversified under the Act, it will be more susceptible to adverse developments
affecting any single issuer. The Adjustable Rate Government, Short Duration
Government, Short Duration Tax-Free, Government Income, Municipal Income, Core
Fixed Income and High Yield Funds are, in addition to these tax
diversification requirements, also subject to the diversification requirements
arising out of their diversified status under the Act.
 
 
                              PORTFOLIO TURNOVER
 
  Each Fund may engage in active short-term trading to benefit from yield
disparities among different issues of securities or among the markets for
fixed-income securities, or for other reasons. It is anticipated that the
portfolio turnover rate of each Fund will vary from year to year. The
portfolio turnover rate is computed by dividing the lesser of the dollar
amount of securities purchased or securities sold (excluding all securities
whose maturities at acquisition are one year or less) by the average monthly
value of such securities owned during the year. A 100% turnover rate would
occur, for example, if all of the securities held by a Fund were sold and
replaced within one year. The Investment Adviser will not consider the
portfolio turnover rate a limiting factor in making investment decisions for a
Fund consistent with the Fund's investment objectives and portfolio management
policies. A high rate of portfolio turnover results in increased transaction
costs to a Fund. The portfolio turnover rate includes the effect of entering
into mortgage dollar rolls. See "Financial Highlights" for a statement of each
Fund's historical portfolio turnover rates.
 
 
                                  MANAGEMENT
 
TRUSTEES AND OFFICERS
 
  The Trustees are responsible for deciding matters of general policy and
reviewing the actions of the Investment Advisers, distributor and transfer
agent. The officers of the Trust conduct and supervise each Fund's daily
business operations. The Additional Statement contains information as to the
identity of, and other information about, the Trustees and officers of the
Trust.
 
INVESTMENT ADVISERS
 
  INVESTMENT ADVISERS. Goldman Sachs Funds Management, L.P., One New York
Plaza, New York, New York 10004, a Delaware limited partnership which is an
affiliate of Goldman Sachs, serves as investment adviser to the Adjustable
Rate Government and Short Duration Government Funds. Goldman Sachs Funds
Management, L.P. registered as an investment adviser in 1990. Goldman Sachs
Asset Management, One New York Plaza, New York, New York 10004, a separate
operating division of Goldman Sachs, serves as investment adviser to the Short
Duration Tax-Free, Government Income, Municipal Income, Core Fixed Income and
High Yield Funds. Goldman Sachs registered as an investment adviser in 1981.
Goldman Sachs Asset Management International,
 
                                      40
<PAGE>
 
133 Peterborough Court, London EC4A 2BB, England, an affiliate of Goldman
Sachs, serves as investment adviser to the Global Income Fund. Goldman Sachs
Asset Management International became a member of the Investment Management
Regulatory Organization Limited in 1990 and registered as an investment
adviser in 1991. The Goldman Sachs Group, L.P., which controls the Investment
Advisers, has announced that it will pursue an initial public offering of the
firm during the fourth quarter of 1998; if the public offering is consummated,
The Goldman Sachs Group, L.P. will merge into the new public company, which
will be called The Goldman Sachs Group, Inc. As of July 24, 1998, GSAM, GSFM
and GSAMI, together with their affiliates, acted as investment adviser or
distributor for assets in excess of $168 billion.
 
  Under a Management Agreement with each Fund, the applicable Investment
Adviser, subject to the general supervision of the Trustees, provides day-to-
day advice as to the Fund's portfolio transactions. Goldman Sachs has agreed
to permit the Funds to use the name "Goldman Sachs" or a derivative thereof as
part of each Fund's name for as long as a Fund's Management Agreement is in
effect.
 
  In performing its investment advisory services, each Investment Adviser,
while remaining ultimately responsible for the management of the Funds, is
able to draw upon the research and expertise of its asset management
affiliates for portfolio decisions and management with respect to certain
portfolio securities. In addition, the Investment Advisers will have access to
the research of, and certain proprietary technical models developed by,
Goldman Sachs and may apply quantitative and qualitative analysis in
determining the appropriate allocations among the categories of issuers and
types of securities.
 
  Under the Management Agreement, each Investment Adviser also: (i) supervises
all non-advisory operations of each Fund that it advises; (ii) provides
personnel to perform such executive, administrative and clerical services as
are reasonably necessary to provide effective administration of each Fund;
(iii) arranges for at each Fund's expense (a) the preparation of all required
tax returns, (b) the preparation and submission of reports to existing
shareholders, (c) the periodic updating of prospectuses and Additional
Statements and (d) the preparation of reports to be filed with the SEC and
other regulatory authorities; (iv) maintains each Fund's records; and (v)
provides office space and all necessary office equipment and services.
 
  ADJUSTABLE RATE GOVERNMENT AND SHORT DURATION GOVERNMENT FUNDS. The Funds'
portfolio managers are Jonathan A. Beinner, Richard C. Lucy, James B. Clark,
Peter A. Dion and James P. McCarthy. Their responsibilities include investing
in the particular types of securities the Funds may hold. Mr. Beinner is a
Managing Director of Goldman Sachs and Co-Head of GSAM's U.S. Fixed Income
Department. Mr. Beinner joined the Investment Adviser in 1990. Mr. Lucy is a
Vice President of Goldman Sachs and Co-Head of GSAM's U.S. Fixed Income
Department. Mr. Lucy joined the Investment Adviser in 1992. Mr. Clark joined
GSAM in 1994 after working as a senior trader at the Federal Home Loan
Mortgage Corporation. Prior to that, he was an investment manager at Travelers
Insurance Company. Mr. Dion is a Vice President of Goldman Sachs and joined
GSAM in 1992. Mr. McCarthy is a Vice President of Goldman Sachs. Mr. McCarthy
joined GSAM in 1995 after working as a bond trader at Nomura Securities.
 
  GOVERNMENT INCOME AND CORE FIXED INCOME FUNDS. The Funds' portfolio managers
are Jonathan A. Beinner and Richard C. Lucy. See above for information about
Mr. Beinner and Mr. Lucy. Messrs. Beinner and Lucy each specialize in
investing in a particular type of security the Fund may hold. James Clark is
also a portfolio manager for the Government Income Fund. See above for
information about Mr. Clark.
 
  SHORT DURATION TAX-FREE AND MUNICIPAL INCOME FUNDS. The Funds' portfolio
managers are Benjamin S. Thompson and Elisabeth Schupf Lonsdale. Mr. Thompson
and Ms. Lonsdale each specialize in municipal securities. Mr. Thompson's
responsibilities include developing investment strategy and structuring
portfolios. Ms. Lonsdale is also responsible for GSAM's municipal credit
research. Mr. Thompson worked in the
 
                                      41
<PAGE>
 
institutional sales and marketing group at GSAM until he joined the fixed-
income team in 1993. Prior to joining GSAM in early 1992, Mr. Thompson worked
in the Structured Finance Group of the Chase Manhattan Bank. Before rejoining
Goldman Sachs in 1995, Ms. Lonsdale was a Director of Fitch Investors Service
evaluating the credit ratings of tax-backed issues. Prior to that, she worked
for ten years in the Goldman Sachs Municipal Finance Department.
 
  GLOBAL INCOME FUND. The Fund's portfolio managers are Stephen Fitzgerald and
Andrew Wilson. Mr. Fitzgerald joined GSAMI in 1992 and is an Executive
Director and Chief Investment Officer for international fixed income. Mr.
Wilson joined GSAMI in 1995 and is Executive Director and Portfolio Manager
for international fixed income. Prior to joining GSAMI, he spent three years
as an Assistant Director at Rothschild Asset Management where he was
responsible for managing global and international bond portfolios, with
specific focus on the U.S., Canadian, Australian and Japanese economies.
 
  HIGH YIELD FUND. The Fund's portfolio managers are Andrew Jessop,
Christopher Testa, Rachel Golder and Michael L. Pasternak. Mr. Jessop is a
Vice President of Goldman Sachs and is responsible for managing high yield
assets. Mr. Jessop joined GSAM in 1997. Prior to joining GSAM, Mr. Jessop
spent six years managing high yield portfolios at Saudi International Bank in
London. Prior to that, he worked for the bank on the interest rate swap desk
and served as an investment analyst in New York. Mr. Testa is a Vice President
of Goldman Sachs and Director of Credit Research responsible for corporate
bond research. Mr. Testa is responsible for managing high yield assets. Mr.
Testa joined GSAM in 1994. Prior to joining GSAM, Mr. Testa was a credit
analyst with CS First Boston and prior to that he was an analyst for
Metropolitan Life Insurance Company investing in private placements and public
debt. Ms. Golder is a Vice President of Goldman Sachs and is responsible for
managing high yield assets. Ms. Golder joined GSAM in 1997. Prior to joining
GSAM, Ms. Golder spent six years at Saudi International Bank as a high yield
credit analyst and portfolio manager. Prior to that Ms. Golder was with
Kleinwort Benson Ltd., where she managed investments in corporate loans. Mr.
Pasternak is a Vice President of Goldman Sachs and is the product manager for
high yield assets. Mr. Pasternak also contributes to the management of high
yield assets. Mr. Pasternak joined GSAM in 1997. Prior to joining GSAM, Mr.
Pasternak spent eight years managing high yield corporate bond and loan
portfolios at Saudi International Bank (an affiliate of JP Morgan) in London.
Prior to that, he was an officer of the bank in Eurocurrency Lending and
Syndications and served as an investment analyst in New York.
 
  It is the responsibility of the Investment Adviser to make the investment
decisions for a Fund and to place the purchase and sale orders for the Fund's
portfolio transactions in U.S. and foreign markets. Such orders may be
directed to any broker including, to the extent and in the manner permitted by
applicable law, Goldman Sachs or its affiliates. In effecting purchases and
sales of portfolio securities for the Funds, the Investment Advisers will seek
the best price and execution of a Fund's orders. In doing so, where two or
more brokers or dealers offer comparable prices and execution for a particular
trade, consideration may be given to whether the broker or dealer provides
investment research or brokerage services or sells shares of any Goldman Sachs
Fund. See the Additional Statement for a further description of the Investment
Advisers' brokerage allocation practices.
 
                                      42
<PAGE>
 
  As compensation for its services rendered and assumption of certain expenses
pursuant to separate Management Agreements, GSAM, GSFM and GSAMI are entitled
to the following fees, computed daily and payable monthly at the annual rates
listed below:
<TABLE>
<CAPTION>
                                             FOR THE FISCAL
                              CONTRACTUAL YEAR OR PERIOD ENDED       AS OF
                                 RATE*     OCTOBER 31, 1997*   SEPTEMBER 1, 1998
                              ----------- -------------------- -----------------
GSAM
- ----
<S>                           <C>         <C>                  <C>
Short Duration Tax-Free......    0.40%           0.40%               0.35%
Government Income............    0.65%           0.25%               0.54%
Municipal Income.............    0.55%           0.55%               0.50%
Core Fixed Income............    0.40%           0.40%               0.40%
High Yield...................    0.70%           0.65%               0.70%
<CAPTION>
GSFM
- ----
<S>                           <C>         <C>                  <C>
Adjustable Rate Government...    0.40%           0.40%               0.40%
Short Duration Government....    0.50%           0.40%               0.50%
<CAPTION>
GSAMI
- -----
<S>                           <C>         <C>                  <C>
Global Income................    0.90%           0.59%               0.65%
</TABLE>
- --------
* The difference, if any, between the stated fees and the actual fees paid by
  the Funds reflects that the applicable Investment Adviser did not charge the
  full amount of the fees to which it would have been entitled for the year
  ended October 31, 1997. The Investment Adviser may discontinue or modify any
  limitations in the future at its discretion.
 
  The Investment Adviser has voluntarily agreed to reduce or limit certain
"Other Expenses" of the Funds (excluding management, distribution and service
fees, transfer agency fees, taxes, interest and brokerage fees and litigation,
indemnification and other extraordinary expenses) to the extent such expenses
exceed 0.05%, 0.00%, 0.00%, 0.00%, 0.00%, 0.10%, 0.00% and 0.02% per annum of
the average daily net assets of the Adjustable Rate Government, Short Duration
Government, Short Duration Tax-Free, Government Income, Municipal Income, Core
Fixed Income, Global Income and High Yield Funds, respectively. Such
reductions or limits, if any, may be discontinued or modified by the
applicable Investment Adviser in its discretion at any time.
 
  ACTIVITIES OF GOLDMAN SACHS AND ITS AFFILIATES AND OTHER ACCOUNTS MANAGED BY
GOLDMAN SACHS. The involvement of the Investment Advisers, Goldman Sachs and
their affiliates in the management of, or their interest in, other accounts
and other activities of Goldman Sachs may present conflicts of interest with
respect to a Fund or limit a Fund's investment activities. Goldman Sachs and
its affiliates engage in proprietary trading and advise accounts and funds
which have investment objectives similar to those of the Funds and/or which
engage in and compete for transactions in the same types of securities,
currencies and instruments as the Funds. Goldman Sachs and its affiliates will
not have any obligation to make available any information regarding their
proprietary activities or strategies, or the activities or strategies used for
other accounts managed by them, for the benefit of the management of the
Funds. The results of a Fund's investment activities, therefore, may differ
from those of Goldman Sachs and its affiliates and it is possible that a Fund
could sustain losses during periods in which Goldman Sachs and its affiliates
and other accounts achieve significant profits on their trading for
proprietary or other accounts. In addition, the Funds may, from time to time,
enter into transactions in which other clients of Goldman Sachs have an
adverse interest. From time to time, a Fund's activities may be limited
because of regulatory restrictions applicable to Goldman Sachs and its
affiliates, and/or their internal policies designed to comply with such
restrictions. See "Management--Activities of Goldman Sachs and its Affiliates
and Other Accounts Managed by Goldman Sachs" in the Additional Statement for
further information.
 
                                      43
<PAGE>
 
DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs, 85 Broad Street, New York, New York 10004, serves as the
exclusive distributor (the "Distributor") of each Fund's shares. Shares may
also be sold by Authorized Dealers. Authorized Dealers include investment
dealers that are members of the NASD and certain other financial service
firms. To become an Authorized Dealer, a dealer or financial service firm must
enter into a sales agreement with Goldman Sachs. The minimum investment
requirements, services, programs and purchase and redemption options for
shares purchased through a particular Authorized Dealer may be different from
those available to investors purchasing through other Authorized Dealers.
 
  Goldman Sachs, 4900 Sears Tower, Chicago, Illinois 60606, also serves as
each Fund's transfer agent (the "Transfer Agent") and as such performs various
shareholder servicing functions. As compensation for the services rendered to
each Fund by Goldman Sachs (as Transfer Agent), Goldman Sachs is entitled to a
fee with respect to each Fund's Class A, Class B and Class C shares equal, on
an annual basis, to 0.19% of average daily net assets. Shareholders with
inquiries regarding any Fund should contact Goldman Sachs (as Transfer Agent)
at the address or the telephone number set forth on the back cover page of
this Prospectus.
 
  From time to time, Goldman Sachs or any of its affiliates may purchase and
hold shares of the Funds. Goldman Sachs reserves the right to redeem at any
time some or all of the shares acquired for its own account.
 
YEAR 2000
 
  Many computer systems were designed using only two digits to signify the
year (for example, "98" for "1998"). On January 1, 2000, if these computer
systems are not corrected, they may incorrectly interpret "00" as the year
"1900" rather than the year "2000," leading to computer shutdowns or errors
(commonly known as the "Year 2000 Problem"). To the extent these systems
conduct forward-looking calculations, these computer problems may occur prior
to January 1, 2000. Like other investment companies and financial and business
organizations, the Funds could be adversely affected in their ability to
process securities trades, price securities, provide shareholder account
services and otherwise conduct normal business operations if the computer
systems used by the Investment Adviser or other Fund service providers do not
adequately address this problem in a timely manner. The Investment Adviser has
established a dedicated group to analyze these issues and to implement the
systems modifications necessary to prepare for the Year 2000 Problem.
Currently, the Investment Adviser does not anticipate that the transition to
the 21st century will have any material impact on its ability to continue to
service the Funds at current levels. In addition, the Investment Adviser has
sought assurances from the Funds' other service providers that they are taking
the steps necessary so that they do not experience Year 2000 Problems, and the
Investment Adviser will continue to monitor the situation. At this time,
however, no assurance can be given that the actions taken by the Investment
Adviser and the Funds' other service providers will be sufficient to avoid any
adverse effect on the Funds due to the Year 2000 Problem.
 
 
                                   EXPENSES
 
  The Funds are responsible for the payment of their expenses. The expenses
include, without limitation: fees payable to the Investment Advisers;
distribution and service fees; custodial and transfer agency fees; brokerage
fees and commissions; filing fees for the registration or qualification of the
Funds' shares under federal or state securities laws; organizational expenses;
fees and expenses incurred in connection with membership in investment company
organizations; taxes; interest; costs of liability insurance, fidelity bonds
or indemnification;
 
                                      44
<PAGE>
 
any costs, expenses or losses arising out of any liability of, or claim for
damages or other relief asserted against, the Funds for violation of any law;
legal and auditing fees and expenses (including the cost of legal and certain
accounting services rendered by employees of the Investment Adviser and its
affiliates with respect to the Funds); expenses of preparing and setting in
type prospectuses, Additional Statement, proxy material, reports and notices
and the printing and distributing of the same to shareholders and regulatory
authorities; compensation and expenses of the Trust's "non-interested"
Trustees; and extraordinary expenses, if any, incurred by the Trust.
 
 
                            REPORTS TO SHAREHOLDERS
 
  Shareholders will receive an annual report containing audited financial
statements and a semi-annual report. To eliminate unnecessary duplication,
only one copy of such reports may be sent to shareholders with the same
mailing address. Shareholders who desire a duplicate copy of such reports to
be mailed to their residence should contact Goldman Sachs at 800-526-7384.
Each shareholder will also be provided with a printed confirmation for each
transaction in the shareholder's account and an individual quarterly account
statement. A year-to-date statement for any account will be provided upon
request made to Goldman Sachs. The Funds do not generally provide sub-
accounting services.
 
 
                                 HOW TO INVEST
 
ALTERNATIVE PURCHASE ARRANGEMENTS
 
  Each Fund continuously offers through this Prospectus Class A, Class B and
Class C shares as described more fully in "How to Buy Shares of the Funds."
(As of the date of this Prospectus, the Adjustable Rate Government Fund did
not offer Class B and Class C shares.) If you do not specify in your
instructions to the Funds which class of shares you wish to purchase, the
Funds will assume that your instructions apply to Class A shares.
 
  CLASS A SHARES. If you invest less than $1 million ($500,000 in the case of
Short Duration Government and Short Duration Tax-Free Funds) in Class A shares
you will pay an initial sales charge. Certain purchases may qualify for
reduced initial sales charges. If you initially invest $1 million ($500,000 in
the case of Short Duration Government and Short Duration Tax-Free Funds) or
more in Class A shares of a Fund, no sales charge will be imposed at the time
of purchase, but you will incur a deferred sales charge equal to 1.00% if you
redeem your shares within 18 months of purchase. Direct purchases (as opposed
to exchanges) of $1 million or more of Class A shares of the Adjustable Rate
Government Fund will not be subject to a deferred sales charge when redeemed.
Class A shares are subject to distribution and service fees of 0.25% (0.50%
with respect to Global Income Fund) per annum of each Fund's average daily net
assets attributable to Class A shares.
 
  CLASS B SHARES. Class B shares are sold without an initial sales charge, but
are subject to a contingent deferred sales charge ("CDSC") of up to 2% in the
case of the Short Duration Government and Short Duration Tax-Free Funds if
redeemed within three years of purchase and up to 5% in the case of the
Government Income, Municipal Income, Core Fixed Income, Global Income and High
Yield Funds if redeemed within six years of purchase. Class B shares are
subject to distribution and service fees of 1.00% (which is currently being
limited to 0.85% in the case of the Short Duration Government and Short
Duration Tax-Free Funds) per annum of each
 
                                      45
<PAGE>
 
Fund's average daily net assets attributable to Class B shares. See
"Distribution and Service Plans." Class B shares will automatically convert to
Class A shares, based on their relative net asset values, eight years after
the initial purchase. Your entire investment in Class B shares is available to
work for you from the time you make your initial investment, but the
distribution and service fee paid by Class B shares will cause your Class B
shares (until conversion to Class A shares) to have a higher expense ratio and
to pay lower dividends, to the extent dividends are paid, than Class A shares.
 
  CLASS C SHARES. Class C shares are sold without an initial sales charge, but
are subject to a CDSC of 1% if redeemed within 12 months of purchase. Class C
shares are subject to distribution and service fees of 1.00% per annum of each
Fund's average daily net assets attributable to Class C shares. See
"Distribution and Service Plans." Class C shares have no conversion feature,
and accordingly, an investor that purchases Class C shares will be subject to
the distribution and service fee imposed on Class C shares for an indefinite
period, subject to annual approval by the Trust's Board of Trustees and
certain regulatory limitations. Your entire investment in Class C shares is
available to work for you from the time you make your initial investment, but
the distribution and service fee paid by Class C shares will cause your Class
C shares to have a higher expense ratio and to pay lower dividends, to the
extent dividends are paid, than Class A shares (or Class B shares after
conversion to Class A shares).
 
  FACTORS TO CONSIDER IN CHOOSING CLASS A, CLASS B OR CLASS C SHARES. The
decision as to which class to purchase depends on the amount you invest, the
intended length of the investment and your personal situation. For example, if
you are making an investment of $100,000 or more that qualifies for a reduced
sales charge, you should consider purchasing Class A shares. A brief
description of when the initial sales charge may be reduced or eliminated is
set forth below under "Right of Accumulation" and "Statement of Intention." If
you prefer not to pay an initial sales charge on an investment and plan to
hold your investment for at least six years (three in the case of the Short
Duration Government and Short Duration Tax-Free Funds), you might consider
purchasing Class B shares. If you prefer not to pay an initial sales charge
and are unsure of the length of your investment or plan to hold your
investment for less than eight years, you may prefer Class C shares. There is
no size limit on the purchase of Class A shares. A maximum purchase limitation
of $250,000 in the aggregate normally applies to purchases of Class B shares
and $1,000,000 ($500,000 in the case of Short Duration Government and Short
Duration Tax-Free) in the aggregate normally applies to purchases of Class C
shares. Although Class C shares are subject to a CDSC for only twelve months
and at a lower rate than Class B shares, Class C shares do not have the
conversion feature applicable to Class B shares, making them subject to higher
distribution and service fees for an indefinite period. Authorized Dealers may
receive different compensation for selling Class A, Class B or Class C shares.
 
HOW TO BUY SHARES OF THE FUNDS -- CLASS A, CLASS B AND CLASS C SHARES
 
  You may purchase shares of the Funds through any Authorized Dealer
(including Goldman Sachs) or directly from a Fund, c/o National Financial Data
Services, Inc. ("NFDS"), P.O. Box 419711, Kansas City, MO 64141-6711 on any
Business Day (as defined under "Additional Information") at the net asset
value next determined after receipt of an order as described below under
"Other Purchase Information" plus, in the case of Class A shares, any
applicable sales charge. Currently, net asset value is determined as of the
close of regular trading on the New York Stock Exchange (which is normally,
but not always, 4:00 p.m. New York time) ("Close of Trading"). If a purchase
order for shares of a Fund (other than Global Income Fund) is received with a
specified settlement date in proper form by the Close of Trading and payment
is made by (a) wire transfer or ACH transfer, shares will be issued and
dividends declared with respect to such shares will begin to accrue on the
later of (i) the Business Day after receipt of the purchase order or (ii) the
date of receipt of payment for the shares or (b) check, Federal Reserve draft
or bank wire, shares will be issued and dividends declared with respect to
such shares will begin to accrue on the Business Day after the date payment is
received. If a purchase order
 
                                      46
<PAGE>
 
for shares of a Fund (other than the Global Income Fund) is received in proper
form without a specified settlement date, shares will be issued and dividends
declared with respect to such shares will begin to accrue on the Business Day
after payment is received. Shares of the Global Income Fund will begin to be
eligible for dividends paid on or after the day the shares are purchased.
 
  The minimum initial investment in each Fund is $1,000. An initial investment
minimum of $250 applies to purchases in connection with tax-sheltered
retirement plans, Individual Retirement Account Plans (excluding SIMPLE IRAs
and Education IRAs) or accounts established under the Uniform Gift to Minors
Act ("UGMA"), and an initial minimum investment of $200 applies to purchases
in connection with 403(b) plans. The minimum initial investment for purchases
in connection with SIMPLE IRAs and Education IRAs, as well as purchases
through the Automatic Investment Plan, is $50. The minimum subsequent
investment is $50. These requirements may be waived at the discretion of the
Trust's officers.
 
  You may pay for purchases of shares by check (except that the Trust will not
accept a check drawn on a foreign bank or a third party check), Federal
Reserve draft, federal funds wire, ACH transfer or bank wire. Purchases of
shares by check or Federal Reserve draft should be made payable as follows:
(i) to an investor's Authorized Dealer, if purchased through such Authorized
Dealer, or (ii) to Goldman Sachs Fixed Income Funds -- (Name of Fund and class
of shares) and sent to NFDS, P.O. Box 419711, Kansas City, MO 64141-6711.
Federal funds wires, ACH transfers and bank wires should be sent to State
Street Bank and Trust Company ("State Street"). Payment must be received
within three Business Days after receipt of the purchase order. An investor's
Authorized Dealer is responsible for forwarding payment promptly to the Fund.
 
  In order to make an initial investment in a Fund, an investor must establish
an account with the Fund by furnishing to the Fund, Goldman Sachs or the
investor's Authorized Dealer the information in the Account Application
attached to this Prospectus. The Funds may refuse to open an account for any
investor who fails to (i) provide a social security number or other taxpayer
identification number, or (ii) certify that such number is correct (if
required to do so under applicable law).
 
  The Funds reserve the right to redeem shares of any shareholder whose
account balance is less than $50 as a result of earlier redemptions. Such
redemptions will not be implemented if the value of a shareholder's account
falls below the minimum account balance solely as a result of market
conditions. A Fund will give sixty (60) days' prior written notice to
shareholders whose shares are being redeemed to allow them to purchase
sufficient additional shares of the Fund to avoid such redemption. In
addition, the Funds and Goldman Sachs reserve the right to modify the minimum
investment, the manner in which shares are offered and the sales charge rates
applicable to future purchases of shares.
 
OFFERING PRICE -- CLASS A SHARES
 
  The offering price of Class A shares of the Government Income, Municipal
Income, Core Fixed Income, Global Income and High Yield Funds is the next
determined net asset value per share plus a sales charge, if any, paid to
Goldman Sachs at the time of purchase of shares as shown in the following
table:
 
<TABLE>
<CAPTION>
                                                  SALES CHARGE   MAXIMUM DEALER
                                  SALES CHARGE AS AS PERCENTAGE   ALLOWANCE AS
       AMOUNT OF PURCHASE          PERCENTAGE OF  OF NET AMOUNT   PERCENTAGE OF
(INCLUDING SALES CHARGE, IF ANY)  OFFERING PRICE    INVESTED    OFFERING PRICE***
- --------------------------------  --------------- ------------- -----------------
<S>                               <C>             <C>           <C>
Less Than $100,000.............        4.50%          4.71%           4.00%
$100,000 up to (but less than)
 $250,000......................        3.00           3.09            2.50
$250,000 up to (but less than)
 $500,000......................        2.50           2.56            2.00
$500,000 up to (but less than)
 $1 million....................        2.00           2.04            1.75
$1 million or more.............        0.00*          0.00*            **
</TABLE>
 
                                      47
<PAGE>
 
  The offering price of Class A shares of the Short Duration Government and
Short Duration Tax-Free Funds is the next determined net asset value per share
plus a sales charge, if any, paid to Goldman Sachs at the time of purchase of
shares as shown in the following table:
 
<TABLE>
<CAPTION>
                                                  SALES CHARGE   MAXIMUM DEALER
                                  SALES CHARGE AS AS PERCENTAGE   ALLOWANCE AS
       AMOUNT OF PURCHASE          PERCENTAGE OF  OF NET AMOUNT   PERCENTAGE OF
(INCLUDING SALES CHARGE, IF ANY)  OFFERING PRICE    INVESTED    OFFERING PRICE***
- --------------------------------  --------------- ------------- -----------------
<S>                               <C>             <C>           <C>
Less than $250,000.............        2.00%          2.04%           1.75%
$250,000 up to (but less than)
 $500,000......................        1.50           1.52            1.25
$500,000 or more...............        0.00%*         0.00*             **
 
  The offering price of Class A shares of the Adjustable Rate Government Fund
is the next determined net asset value per share plus a sales charge, if any,
paid to Goldman Sachs at the time of purchase of shares as shown in the
following table:
 
<CAPTION>
                                                  SALES CHARGE   MAXIMUM DEALER
                                  SALES CHARGE AS AS PERCENTAGE   ALLOWANCE AS
       AMOUNT OF PURCHASE          PERCENTAGE OF  OF NET AMOUNT   PERCENTAGE OF
(INCLUDING SALES CHARGE, IF ANY)  OFFERING PRICE    INVESTED    OFFERING PRICE***
- --------------------------------  --------------- ------------- -----------------
<S>                               <C>             <C>           <C>
Less Than $500,000.............        1.50%          1.52%           1.25%
$500,000 up to (but less than)
 $1 million....................        1.00           1.01            0.75
$1 million or more.............        0.00           0.00            0.00
</TABLE>
- --------
  * No sales charge is payable at the time of purchase of Class A shares of $1
    million ($500,000 in the case of the Short Duration Government and Short
    Duration Tax Free Funds) or more, but a CDSC may be imposed in the event
    of certain redemption transactions made within 18 months of purchase.
 
 ** Goldman Sachs pays a one-time commission to Authorized Dealers who
    initiate or are responsible for purchases of $1 million or more of shares
    of each Fund ($500,000 in the case of the Short Duration Government and
    Short Duration Tax-Free Funds) equal to 1.00% of the amount under $3
    million, 0.50% of the next $2 million, and 0.25% thereafter. Goldman Sachs
    may also pay, with respect to all or a portion of the amount purchased, a
    commission in accordance with the foregoing schedule to Authorized Dealers
    who initiate or are responsible for plans investing in the Funds which
    satisfy the criteria set forth in (h) below or "wrap" accounts purchasing
    $1 million or more ($500,000 in the case of the Short Duration Government
    and Short Duration Tax-Free Funds) which satisfy the criteria set forth in
    (i) below. Purchases by such plans will be made at net asset value with no
    initial sales charge, but if all of the shares held are redeemed within 18
    months after the end of the calendar month in which such purchase was
    made, a contingent deferred sales charge (CDSC), as described below, of
    1.00% will be imposed upon the plan sponsor or the third party
    administrator. In addition, Authorized Dealers will remit to Goldman Sachs
    such payments received in connection with "wrap" accounts in the event
    that shares are redeemed within 18 months after the end of the calendar
    month in which the purchase was made.
 
*** During special promotions, the entire sales charge may be reallowed to
    Authorized Dealers. Authorized Dealers to whom substantially the entire
    sales charge is reallowed may be deemed to be "underwriters" under the
    Securities Act of 1933.
 
  Purchases of $1 million ($500,000 in the case of Short Duration Government
and Short Duration Tax-Free Funds) or more of Class A shares will be made at
net asset value with no initial sales charge, but if the shares are redeemed
within 18 months after the end of the calendar month in which the purchase is
made, excluding any period of time in which the shares were exchanged into and
remained invested in an ILA Portfolio (the
 
                                      48
<PAGE>
 
"CDSC period"), a CDSC of 1.00% may be imposed unless, in certain cases, the
investor's Authorized Dealer enters into an agreement with Goldman Sachs to
return all or an applicable prorated portion of its commission to Goldman
Sachs. Any applicable CDSC will be assessed on an amount equal to the lesser
of the current market value or the original purchase cost of the redeemed
Class A shares. Accordingly, no CDSC will be imposed on increases in account
value above the initial purchase price, including any dividend or capital
gains distributions which have been reinvested in additional Class A shares.
Upon redemption of shares subject to a CDSC, shareholders will receive that
portion of the appreciation in account value attributable to the shares
actually redeemed. In determining whether a CDSC applies to a redemption, it
will be assumed that the redemption is first made from any Class A shares in
your account that are not subject to the CDSC. The CDSC is waived on
redemptions in certain circumstances. See "Waiver or Reduction of Contingent
Deferred Sales Charges" below.
 
  Class A shares of the Funds may be sold at net asset value without payment
of any sales charge to (a) Goldman Sachs, its affiliates or their respective
officers, partners, directors or employees (including retired employees and
former partners), any partnership of which Goldman Sachs is a general partner,
any Trustee or officer of the Trust and designated family members of any of
the above individuals; (b) qualified retirement plans of Goldman Sachs; (c)
trustees or directors of investment companies for which Goldman Sachs or an
affiliate acts as sponsor; (d) any employee or registered representative of
any Authorized Dealer or their respective spouses, children and parents; (e)
banks, trust companies or other types of depository institutions investing for
their own account or investing for accounts for which they have investment
discretion; (f) banks, trust companies or other types of depository
institutions investing for accounts for which they do not have investment
discretion; (g) any state, county or city, or any instrumentality, department,
authority or agency thereof, which is prohibited by applicable investment laws
from paying a sales charge or commission in connection with the purchase of
shares of a Fund; (h) pension and profit sharing plans, pension funds and
other company-sponsored benefit plans that (1) buy shares costing $500,000 or
more, or (2) have at the time of purchase, 100 or more eligible participants,
or (3) certify that they project to have annual plan purchases of $200,000 or
more, or (4) are provided administrative services by certain third-party
administrators that have entered into a special service arrangement with
Goldman Sachs relating to such plan; (i) "wrap" accounts for the benefit of
clients of broker-dealers, financial institutions or financial planners,
provided that they have entered into an agreement with GSAM specifying
aggregate minimums and certain operating policies and standards;
(j) registered investment advisers investing for accounts for which they
receive asset-based fees; (k) accounts over which GSAM or its advisory
affiliates have investment discretion; and (l) shareholders receiving
distributions from a qualified retirement plan invested in the Goldman Sachs
Funds and reinvesting such proceeds in a Goldman Sachs IRA. Purchasers must
certify eligibility for an exemption on the Account Application and notify
Goldman Sachs if the shareholder is no longer eligible for an exemption.
Exemptions will be granted subject to confirmation of a purchaser's
entitlement. Investors purchasing shares of the Funds at net asset value
without payment of any initial sales charge may be charged a fee if they
effect transactions in shares through a broker or agent. In addition, under
certain circumstances, dividends and distributions from any of the Goldman
Sachs Funds may be reinvested in shares of each Fund at net asset value, as
described under "Cross-Reinvestment of Dividends and Distributions and
Automatic Exchange Program."
 
RIGHT OF ACCUMULATION -- CLASS A SHARES
 
  Class A purchasers may qualify for reduced sales charges when the current
market value of holdings (shares at current offering price), plus new
purchases, reaches $100,000 or more in the case of the Government Income,
Municipal Income, Core Fixed Income, Global Income and High Yield Funds,
$250,000 or more in the case of the Short Duration Government and Short
Duration Tax-Free Funds and $500,000 or more in the case of the Adjustable
Rate Government Fund. Class A shares of the Goldman Sachs Funds may be
combined under the Right of Accumulation. See the Additional Statement for
more information about the Right of Accumulation.
 
                                      49
<PAGE>
 
STATEMENT OF INTENTION -- CLASS A SHARES
 
  Purchases of $100,000 or more in the case of the Government Income,
Municipal Income, Core Fixed Income, Global Income and High Yield Funds,
$250,000 or more in the case of the Short Duration Government and Short
Duration Tax-Free Funds and $500,000 in the case of the Adjustable Rate
Government Fund made over a 13-month period are eligible for reduced sales
charges. Class A shares of the Goldman Sachs Funds may be combined under the
Statement of Intention. See the Additional Statement for more information
about the Statement of Intention.
 
OFFERING PRICE -- CLASS B SHARES
 
  Investors may purchase Class B shares of a Fund (other than Adjustable Rate
Government Fund) at the next determined net asset value without the imposition
of an initial sales charge. However, Class B shares redeemed within six years
(three years in the case of the Short Duration Government and Short Duration
Tax-Free Funds) of purchase will be subject to a CDSC at the applicable rates
shown in the tables that follow. At redemption, the charge will be assessed on
the amount equal to the lesser of the current market value or the original
purchase cost of the shares being redeemed. No CDSC will be imposed on
increases in account value above the initial purchase price, including shares
derived from the reinvestment of dividends or capital gains distributions.
Upon redemption of shares subject to a CDSC, shareholders will receive that
portion of the appreciation in account value attributable to the shares
actually redeemed.
 
  The amount of the CDSC, if any, will vary depending on the number of years
from the time of purchase until the time of redemption of Class B shares. For
the purpose of determining the number of years from the time of any purchase,
all payments during a month will be aggregated and deemed to have been made on
the first day of that month. In processing redemptions of Class B shares, the
Funds will first redeem shares not subject to any CDSC, and then shares held
longest during the applicable period.
 
<TABLE>
<CAPTION>
                                                CDSC AS A PERCENTAGE OF
                                            DOLLAR AMOUNTS SUBJECT TO CDSC
                                       -----------------------------------------
                                        GOVERNMENT INCOME,
                                        MUNICIPAL INCOME,      SHORT DURATION
                                          GLOBAL INCOME,    GOVERNMENT AND SHORT
       YEAR SINCE                       CORE FIXED INCOME      DURATION TAX-
       PURCHASE                        AND HIGH YIELD FUNDS      FREE FUNDS
       ----------                      -------------------- --------------------
       <S>                             <C>                  <C>
       First..........................         5.0%                 2.0%
       Second.........................         4.0%                 1.0%
       Third..........................         3.0%                 1.0%
       Fourth.........................         3.0%                 none
       Fifth..........................         2.0%                 none
       Sixth..........................         1.0%                 none
       Seventh and thereafter.........         none                 none
</TABLE>
 
  Proceeds from the CDSC are payable to the Distributor and may be used in
whole or part to defray the Distributor's expenses related to providing
distribution-related services to the Funds in connection with the sale of
Class B shares, including the payment of compensation to Authorized Dealers. A
commission equal to 2.0% in the case of the Short Duration Government and
Short Duration Tax-Free Funds and 4.0% in the case of the other Funds of the
amount invested is paid to Authorized Dealers.
 
  Class B shares of a Fund will automatically convert into Class A shares of
the same Fund at the end of the calendar quarter that is eight years after the
purchase date, except as noted below. Class B shares of a Fund
 
                                      50
<PAGE>
 
acquired by exchange from Class B shares of another Fund will convert into
Class A shares of such Fund based on the date of the initial purchase. Class B
shares acquired through reinvestment of distributions will convert into Class
A shares based on the date of the initial purchase of the shares on which the
distribution was paid. The conversion of Class B shares to Class A shares will
not occur at any time the Funds are advised that such conversions may
constitute taxable events for federal tax purposes, which the Funds believe is
unlikely. If conversions do not occur as a result of possible taxability,
Class B shares would continue to be subject to higher expenses than Class A
shares for an indeterminate period.
 
OFFERING PRICE -- CLASS C SHARES
 
  Investors may purchase Class C shares of a Fund (other than the Adjustable
Rate Government Fund) at the next determined net asset value without the
imposition of an initial sales charge. However, if Class C shares are redeemed
within 12 months of purchase a CDSC of 1% will be deducted from the redemption
proceeds. At redemption, the charge will be assessed on the amount equal to
the lesser of the current market value or the original purchase cost of the
shares being redeemed. No CDSC will be imposed on increases in account value
above the initial purchase price, including shares derived from the
reinvestment of dividends or capital gains distributions. Upon redemption of
shares subject to a CDSC, shareholders will receive that portion of the
appreciation in account value attributable to the shares actually redeemed.
 
  For the purpose of determining the number of months from the time of any
purchase, all payments during a month will be aggregated and deemed to have
been made on the first day of that month. In processing redemptions of Class C
shares, the Funds will first redeem shares held for longer than 12 months, and
then shares held for the longest period during the 12 month period. Proceeds
from the CDSC are payable to the Distributor and may be used in whole or in
part to defray the Distributor's expenses related to providing distribution-
related services to the Funds in connection with the sale of Class C shares,
including the payment of compensation to Authorized Dealers. A commission
equal to 1.00% of the amount invested is paid to Authorized Dealers.
 
REINVESTMENT OF REDEMPTION PROCEEDS--CLASS A, CLASS B AND CLASS C SHARES
 
  A shareholder who redeems Class A or Class B shares of a Fund may reinvest
at net asset value any portion or all of the redemption proceeds (plus that
amount necessary to acquire a fractional share to round off the purchase to
the nearest full share) in Class A shares of the same Fund or any other
Goldman Sachs Fund. A shareholder who redeems Class C Shares of a Fund may
reinvest at net asset value any portion or all of the redemption proceeds
(plus that amount necessary to acquire a fractional share to round off the
purchase to the nearest full share) in Class C Shares of the same Fund or any
other Goldman Sachs Fund. Shareholders should obtain and read the applicable
prospectuses of such other funds and consider their objectives, policies and
applicable fees before investing in any of such funds. This reinvestment
privilege is subject to the condition that the shares redeemed have been held
for at least thirty (30) days before the redemption and that the reinvestment
is effected within ninety (90) days after such redemption. If you redeemed
Class A or Class C shares, paid a CDSC upon a redemption and reinvest in Class
A or Class C shares subject to the conditions set forth above, your account
will be credited with the amount of the CDSC previously charged, and the
reinvested shares will continue to be subject to a CDSC. In this case, the
holding period of the Class A or Class C shares acquired through reinvestment
for purposes of computing the CDSC payable upon a subsequent redemption will
include the holding period of the redeemed shares. If you redeemed Class B
shares and paid a CDSC upon redemption, you are permitted to reinvest the
redemption proceeds in Class A shares at net asset value as described above,
but the amount of the CDSC paid upon redemption will not be credited to your
account.
 
                                      51
<PAGE>
 
  A reinvesting shareholder may be subject to tax as a result of such
redemption. If the redemption occurs within ninety (90) days after the
original purchase of Class A shares, any sales charge paid on the original
purchase cannot be taken into account by a reinvesting shareholder to the
extent an otherwise applicable sales charge is not imposed pursuant to the
reinvestment privilege for purposes of determining gain or loss, if any,
realized on the redemption, but instead will be added to the tax basis of the
Class A shares received in the reinvestment. To the extent that any loss is
realized and shares of the same Fund are purchased within 30 days before or
after the redemption, some or all of the loss may not be allowed as a
deduction depending upon the number of shares purchased. Shareholders should
consult their own tax advisers concerning the tax consequences of a redemption
and reinvestment. Upon receipt of a written request, the reinvestment
privilege may be exercised once annually by a shareholder, except that there
is no such time limit as to the availability of this privilege in connection
with transactions the sole purpose of which is to reinvest the proceeds at net
asset value in a tax-sheltered retirement plan.
 
WAIVER OR REDUCTION OF CONTINGENT DEFERRED SALES CHARGE--CLASS A, B AND C
SHARES
 
  The CDSC on Class B shares, Class C shares and Class A shares that are
subject to a CDSC may be waived or reduced if the redemption relates to (a)
retirement distributions or loans to participants or beneficiaries from
pension and profit sharing plans, pension funds and other company sponsored
benefit plans (each a "Plan"); (b) the death or disability (as defined in
section 72(m)(7) of the Code) of a participant or beneficiary in a Plan; (c)
hardship withdrawals by a participant or beneficiary in a Plan; (d) satisfying
the minimum distribution requirements of the Code; (e) the establishment of
"substantially equal periodic payments" as described in Section 72(t)(2) of
the Code; (f) the separation from service by a participant or beneficiary in a
Plan; (g) the death or disability (as defined in section 72(m)(7) of the Code)
of a shareholder if the redemption is made within one year of such event; (h)
excess contributions being returned to a Plan; (i) distributions from a
qualified retirement plan invested in the Goldman Sachs Funds which are being
rolled over to a Goldman Sachs IRA; and (j) redemption proceeds which are to
be reinvested in accounts or non-registered products over which GSAM or its
advisory affiliates have investment discretion. In addition, Class A, Class B
and Class C shares subject to a Systematic Withdrawal Plan may be redeemed
without a CDSC. However, Goldman Sachs reserves the right to limit such
redemptions, on an annual basis, to 12% each of the value of your Class B and
Class C shares and 10% of the value of your Class A shares.
 
 
                      SERVICES AVAILABLE TO SHAREHOLDERS
 
AUTOMATIC INVESTMENT PLAN
 
  Systematic cash investments may be made through a shareholder's bank via the
Automated Clearing House Network or a shareholder's checking account via bank
draft each month. Required forms are available from Goldman Sachs or any
Authorized Dealer.
 
CROSS-REINVESTMENT OF DIVIDENDS AND DISTRIBUTIONS AND AUTOMATIC EXCHANGE
PROGRAM
 
  A shareholder may elect to cross-reinvest dividends and capital gain
distributions paid by a Fund in shares of the same class or an equivalent
class of any other Goldman Sachs Fund or ILA Portfolio. See "Fund Highlights."
A shareholder may also elect to exchange automatically a specified dollar
amount of shares of a Fund for shares of the same class or an equivalent class
of any other Goldman Sachs Fund or ILA Portfolio. Shares acquired through
cross-reinvestment of dividends or the automatic exchange program will be
purchased
 
                                      52
<PAGE>
 
at net asset value and will not be subject to any initial or contingent
deferred sales charge as a result of the cross-reinvestment or exchange, but
shares subject to a CDSC acquired under the automatic exchange program may be
subject to a CDSC at the time of redemption from the fund into which the
exchange is made determined on the basis of the date and value of the
investor's initial purchase of the fund from which the exchange (or any prior
exchange) is made. Automatic exchanges are made monthly on the fifteenth day
of each month or the first Business Day thereafter. The minimum dollar amount
for automatic exchanges must be at least $50 per month. Cross-reinvestments
and automatic exchanges are subject to the following conditions: (i) the value
of the shareholder's account(s) in the fund which is paying the dividend or
from which the automatic exchange is being made must equal or exceed $5,000
and (ii) the value of the account in the acquired fund must equal or exceed
the acquired fund's minimum initial investment requirement or the shareholder
must elect to continue cross- reinvestment or automatic exchanges until the
value of acquired fund shares in the shareholder's account equals
or exceeds the acquired fund's minimum initial investment requirement. A Fund
shareholder may elect cross-reinvestment into an identical account or an
account registered in a different name or with a different address, social
security or other taxpayer identification number, provided that the account in
the acquired fund has been established, appropriate signatures have been
obtained and the minimum initial investment requirement has been satisfied. A
Fund shareholder should obtain and read the prospectus of the fund into which
dividends are invested or automatic exchanges are made.
 
TAX-SHELTERED RETIREMENT PLANS
 
  The Funds (other than the Short Duration Tax-Free and Municipal Income
Funds) offer their shares for purchase by retirement plans, including
traditional and Roth IRAs for individuals and their spouses, IRA plans for
employees in connection with employer sponsored SEP, SAR-SEP and SIMPLE IRA
plans, 403(b) plans and defined contribution plans such as 401(k) Salary
Reduction Plans. Detailed information concerning these plans may be obtained
from the Transfer Agent. This information should be read carefully, and
consultation with an attorney or tax adviser may be advisable. The information
sets forth the service fee charged for retirement plans and describes the
federal income tax consequences of establishing a plan.
 
EXCHANGE PRIVILEGE
 
  Shares of a Fund may be exchanged at net asset value without the imposition
of an initial sales charge or CDSC at the time of exchange for shares of the
same class or an equivalent class of any other Fund, Goldman Sachs Fund or ILA
Portfolio. A shareholder needs to obtain and read the prospectus of the fund
into which the exchange is made. The shares of these other funds acquired by
an exchange may later be exchanged for shares of the same class (or an
equivalent class) of the original Fund at the next determined net asset value
without the imposition of an initial or contingent deferred sales charge if
the dollar amount in the Fund resulting from such exchanges is below the
shareholder's all-time highest dollar amount on which it has previously paid
the applicable sales charge. Shares of these other funds purchased through
dividends and/or capital gains reinvestment may be exchanged for shares of the
Funds without a sales charge. In addition to free automatic exchanges pursuant
to the Automatic Exchange Program, six free exchanges are permitted in each
twelve-month period. A fee of $12.50 may be charged for each subsequent
exchange during such period. The exchange privilege may be materially modified
or withdrawn at any time upon sixty (60) days' notice to shareholders and is
subject to certain limitations.
 
  An exchange of shares subject to a CDSC will not be subject to the
applicable CDSC at the time of exchange. Shares subject to a CDSC acquired in
an exchange will be subject to the CDSC of the shares originally
 
                                      53
<PAGE>
 
held. For purposes of determining the amount of any applicable CDSC, the
length of time a shareholder has owned shares will be measured from the date
the shareholder acquired the original shares subject to a CDSC and will not be
affected by any subsequent exchange.
 
  An exchange may be made by identifying the applicable Fund and class of
shares and either writing to Goldman Sachs, Attention: Goldman Sachs Fixed
Income Funds, Shareholder Services, c/o NFDS, P.O. Box 419711, Kansas City, MO
64141-6711 or, unless the investor has specifically declined telephone
exchange privileges on the Account Application or elected in writing not to
utilize telephone exchanges, by a telephone request to the Transfer Agent at
800-526-7384 (8:00 a.m. to 4:00 p.m. New York time). Certain procedures are
employed to prevent unauthorized or fraudulent exchange requests as set forth
under "How to Sell Shares of the Funds." Under the telephone exchange
privilege, shares may be exchanged among accounts with different names,
addresses and social security or other taxpayer identification numbers only if
the exchange instructions are in writing and received in accordance with the
procedures set forth under "How to Sell Shares of the Funds." In times of
drastic economic or market changes the telephone exchange privilege may be
difficult to implement.
 
  For federal income tax purposes, an exchange, including an automatic
exchange, is treated as a redemption of the shares surrendered in the
exchange, on which an investor may be subject to tax, followed by a purchase
of shares received in the exchange. If such redemption occurs within ninety
(90) days after the purchase of such shares, to the extent an initial sales
charge that would otherwise apply to the shares received in the exchange is
not imposed, the sales charge paid on such purchase of Class A shares cannot
be taken into account by the exchanging shareholder for purposes of
determining gain or loss, if any, realized on such redemption for federal
income tax purposes, but instead will be added to the tax basis of the shares
received in the exchange. Shareholders should consult their own tax advisers
concerning the tax consequences of an exchange.
 
  Eligible investors may exchange Class A shares for Institutional shares of
the same Fund. For further information contact Goldman Sachs at the number set
forth in the back of the Prospectus.
 
  All exchanges which represent an initial investment in a Fund must satisfy
the minimum investment requirements of the Fund into which the shares are
being exchanged. Exchanges are available only in states where exchanges may
legally be made.
 
OTHER PURCHASE INFORMATION
 
  Authorized Dealers and other financial intermediaries may be authorized to
accept on the Trust's behalf orders placed by or on behalf of their customers
and, if approved by the Trust, to designate other intermediaries to accept
such orders. In these cases, a Fund will be deemed to have received an order
that is in proper form when the order is accepted by an Authorized Dealer or
intermediary on a Business Day, and the order will be priced at a Fund's net
asset value per share (adjusted for any applicable sales charge) next
determined after such acceptance. Otherwise, a Fund or Goldman Sachs must
receive an order in proper form before it is effective. Authorized Dealers and
intermediaries will be responsible for transmitting accepted orders to the
Funds within the period agreed upon by them. Customers should contact their
Authorized Dealers or intermediaries to learn whether they are authorized to
accept orders for the Trust.
 
  Authorized Dealers and other financial intermediaries provide varying
arrangements for their clients to purchase and redeem Fund shares. Some may
establish higher minimum investment requirements and others may limit the
availability of certain privileges with respect to the purchase and redemption
of shares or the
 
                                      54
<PAGE>
 
reinvestment of dividends. Firms may arrange with their clients for other
investment or administrative services and may independently establish and
charge additional fees not described in this Prospectus to their clients for
such services. If shares of a Fund are held in a "street name" account or were
purchased through an Authorized Dealer, shareholders should contact the
Authorized Dealer to purchase, redeem or exchange shares, to make changes in
or give instructions concerning the account or to obtain information about the
account.
 
  The Funds and Goldman Sachs each reserves the right to reject any specific
purchase order (including exchanges) or to restrict purchases or exchanges by
a particular purchaser (or group of related purchasers). This may occur, for
example, when a purchaser or group of purchasers' pattern of frequent
purchases, sales or exchanges of shares of a Fund is evident, or if purchases,
sales or exchanges are, or a subsequent abrupt redemption might be, of a size
that would disrupt management of a Fund.
 
  In the sole discretion of Goldman Sachs, a Fund may accept securities
instead of cash for the purchase of shares of the Fund. Such purchases will be
permitted only if the Investment Adviser determines that any securities
acquired in this manner are consistent with the Fund's investment objectives,
restrictions and policies and are desirable investments for the Fund.
 
  The Investment Advisers, Distributor, and/or their affiliates, also pay
additional compensation, from time to time, out of their assets and not as an
additional charge to the Funds, to selected Authorized Dealers and other
persons in connection with the sale, distribution and/or servicing of shares
of the Funds and other investment funds of the Trust (such as additional
payments based on new sales, amounts exceeding pre-established thresholds, or
the length of time customers' assets have remained in a Fund) and, subject to
applicable NASD regulations, contribute to various non-cash and cash incentive
arrangements to promote the sale of shares, as well as sponsor various
educational programs, sales contests and/or promotions in which participants
may receive reimbursement of expenses, entertainment and prizes such as travel
awards, merchandise, cash, investment research and educational information and
related support materials. This additional compensation can vary among
Authorized Dealers depending upon such factors as the amounts their customers
have invested (or may invest) in particular investment funds of the Trust, the
particular program involved, or the amount of reimbursable expenses.
Additional compensation based on sales may, but is currently not expected to,
exceed .50% (annualized) of the amount invested. For further information, see
"Other Information Regarding Purchases, Redemptions, Exchanges and Dividends"
in the Additional Statement.
 
 
                        DISTRIBUTION AND SERVICE PLANS
 
  The Trust has adopted distribution and service plans on behalf of the Funds'
Class A, Class B and Class C shares (each a "Plan"). Under the Plans, Goldman
Sachs is entitled to a monthly fee from each Fund for distribution services
equal, on an annual basis, to 0.25%, 0.75% and 0.75%, respectively, of a
Fund's average daily net assets attributable to Class A, Class B and Class C
shares, respectively. Currently, Goldman Sachs has voluntarily agreed to limit
such fees to 0.60% of the average daily net assets attributable to Class B
shares of the Short Duration Government and Short Duration Tax-Free Funds.
Goldman Sachs may modify or discontinue such waivers in the future at its
discretion.
 
  Goldman Sachs may use this distribution fee for its expenses of distributing
Class A, Class B and Class C shares of the Funds. The types of expenses for
which Goldman Sachs may be compensated for distribution
 
                                      55
<PAGE>
 
services under the Plans include: compensation paid to and expenses incurred
by Authorized Dealers, Goldman Sachs and their respective officers, employees
and sales representatives; commissions paid to Authorized Dealers; allocable
overhead; telephone and travel expenses; interest expenses and other costs
associated with the financing of such compensation and expenses; the printing
of prospectuses for prospective shareholders; preparation and distribution of
sales literature and advertising of any type; and all other expenses incurred
in connection with activities primarily intended to result in the sale of
Class A, Class B and Class C shares. Goldman Sachs may also use payments under
the Class A Plan for personal and account maintenance services as described
below. The aggregate compensation that may be received under the Plans for
distribution services may not exceed the limitations imposed by the NASD's
Conduct Rules. Payments for distribution services are also subject to the
requirements of Rule 12b-1 under the Act.
 
  Under the Plans, Goldman Sachs is also entitled to receive a separate fee
equal on an annual basis to 0.25% of each Fund's average daily net assets
attributable to Class A (Global Income Fund only), Class B or Class C shares.
This fee is for personal and account maintenance services, and may be used to
make payments to Goldman Sachs, Authorized Dealers and their officers, sales
representatives and employees for responding to inquiries of, and furnishing
assistance to, shareholders regarding ownership of their Shares or their
accounts or similar services not otherwise provided on behalf of the Funds. If
the distribution or service fees received by Goldman Sachs pursuant to the
Plans exceed its expenses, Goldman Sachs may realize a profit from these
arrangements. The Plans will be reviewed and are subject to approval annually
by the Trustees.
 
  In connection with the sale of Class C shares, Goldman Sachs begins paying
the 0.75% distribution fee as an ongoing commission, and the 0.25% ongoing
service fee, to Authorized Dealers after the Shares have been held for one
year. In connection with the sale of Class A and B shares of the Short
Duration Government and Short Duration Tax-Free Funds, Goldman Sachs begins
paying the 0.25% ongoing distribution or service fee, if any, to Authorized
Dealers after the Shares have been held for one year. All of these fees are
paid by Goldman Sachs on a quarterly basis.
 
 
                        HOW TO SELL SHARES OF THE FUNDS
 
  Each Fund will redeem its shares upon request of a shareholder on any
Business Day at the net asset value next determined after the receipt of such
request in proper form, subject to any applicable CDSC. See "Net Asset Value."
Redemption proceeds will be mailed by check to a shareholder within three (3)
Business Days of receipt of a properly executed request. If the shares to be
redeemed were recently purchased by check, a Fund may delay transmittal of
redemption proceeds until such time as it has assured itself that good funds
have been collected for the purchase of such shares. This may take up to
fifteen (15) days. Redemption requests may be made by writing to or calling
the Transfer Agent at the address or telephone number set forth on the back
cover page of this Prospectus or an Authorized Dealer.
 
  The Trust accepts telephone requests for redemption of shares for amounts up
to $50,000 within any seven (7) calendar day period, except for investors who
have specifically declined telephone redemption privileges on the Account
Application or elected in writing not to utilize telephone redemptions
(proceeds which are sent to a Goldman Sachs brokerage account are not subject
to the $50,000 limit). It may be difficult to implement redemptions by
telephone in times of drastic economic or market changes. By completing an
Account
 
                                      56
<PAGE>
 
Application, an investor agrees that the Trust, the Distributor and the
Transfer Agent shall not be liable for any loss incurred by the investor by
reason of the Trust accepting unauthorized telephone redemption requests if
the Trust reasonably believes the instructions to be genuine. Thus,
shareholders risk possible losses in the event of a telephone redemption not
authorized by them. The Trust may accept telephone redemption instructions
from any person identifying himself as the owner of an account or the owner's
broker where the owner has not declined in writing to utilize this service.
 
  In an effort to prevent unauthorized or fraudulent redemption and exchange
requests by telephone, Goldman Sachs and NFDS each employ reasonable
procedures specified by the Trust to confirm that such instructions are
genuine. Consequently, proceeds of telephone redemption requests will be sent
only to the shareholder's address of record or authorized bank account
designated in the Account Application and exchanges of shares will be made
only to an identical account. Telephone requests will also be recorded. The
Trust may implement other procedures from time to time concerning telephone
redemptions and exchanges. If reasonable procedures are not employed, the
Trust may be liable for any loss due to unauthorized or fraudulent
transactions. Proceeds of telephone redemptions will be mailed to the
shareholder's address of record or wired to the authorized bank account
indicated on the Account Application, unless the shareholder provides written
instructions (accompanied by a signature guarantee) indicating another
address. Telephone redemptions will not be accepted during the 30-day period
following any change in a shareholder's address of record. This redemption
option does not apply to shares held in a "street name" account. Shareholders
whose accounts are held in "street name" should contact their broker of record
who may effect telephone redemptions on their behalf. The Trust reserves the
right to terminate or modify the telephone redemption service at any time.
Shares of each Fund (other than Global Income Fund) earn dividends accrued
through the day on which such shares are redeemed.
 
  Written requests for redemptions must be signed by each shareholder with its
signature guaranteed by a bank, a securities broker or dealer, a credit union
having authority to issue signature guarantees, a savings and loan
association, a building and loan association, a cooperative bank, a federal
savings bank or association, a national securities exchange, a registered
securities association or a clearing agency, provided that such institution
satisfies the standards established by the Transfer Agent.
 
  The Funds will also arrange for the proceeds of redemptions effected by any
means to be wired as federal funds to the bank account designated in the
shareholder's Account Application. Redemption proceeds will normally be wired
on the next Business Day in federal funds (for a total one Business Day delay)
following receipt of a properly executed wire transfer redemption request.
Wiring of redemption proceeds may be delayed one additional Business Day if
the Federal Reserve Bank is closed on the day redemption proceeds would
ordinarily be wired. A transaction fee of $7.50 may be charged for payments of
redemption proceeds by wire. In order to change the bank designated on the
Account Application to receive redemption proceeds, a written request must be
received by the Transfer Agent. This request must be signature guaranteed as
set forth above. Further documentation may be required for executors, trustees
or corporations. Once wire transfer instructions have been given by Goldman
Sachs or an Authorized Dealer, neither a Fund, the Trust, Goldman Sachs nor
any Authorized Dealer assumes any further responsibility for the performance
of intermediaries or the shareholder's bank in the transfer process. If a
problem with such performance arises, the shareholder should deal directly
with such intermediaries or bank.
 
  Additional documentation regarding a redemption by any means may be required
to effect a redemption when deemed appropriate by the Transfer Agent. The
request for such redemption will not be considered to have been received in
proper form until such additional documentation has been received.
 
                                      57
<PAGE>
 
SYSTEMATIC WITHDRAWAL PLAN
 
  A shareholder may draw on shareholdings systematically via check or ACH in
any amount specified by the shareholder over $50. Checks are only available on
or about the 25th of each month. Each systematic withdrawal is a redemption
and therefore a taxable transaction. A minimum balance of $5,000 in shares of
a Fund is required. The maintenance of a withdrawal plan concurrently with
purchases of additional Class A, Class B or Class C shares would be
disadvantageous because of the sales charge imposed on your purchases of Class
A shares or the imposition of a CDSC on your redemptions of Class A, Class B
or Class C shares. The CDSC applicable to Class A, Class B and Class C shares
redeemed under a systematic withdrawal plan may be waived. See "How to
Invest--Waiver or Reduction of Contingent Deferred Sales Charge." See the
Additional Statement for more information about the Systematic Withdrawal
Plan.
 
 
                                   DIVIDENDS
 
  Each dividend from net investment income and capital gains distributions, if
any, declared by a Fund on its outstanding shares will, at the election of
each shareholder, be paid (i) in cash, (ii) in additional shares of the same
class of the Fund or (iii) in shares of the same or an equivalent class of any
other Goldman Sachs Fund or units of the ILA Portfolios (the Prime Obligations
Portfolio only for Class B and Class C) as described under "Cross-Reinvestment
of Dividends and Distributions and Automatic Exchange Program." This election
should initially be made on a shareholder's Account Application and may be
changed upon written notice to Goldman Sachs at any time prior to the record
date for a particular dividend or distribution. If no election is made, all
dividends from net investment income and capital gains distributions will be
reinvested in the applicable Fund.
 
  The election to reinvest dividends and distributions paid by the Fund in
additional shares or units of the Fund or any other Goldman Sachs Fund or ILA
Portfolio will not affect the tax treatment of such dividends and
distributions, which will be treated as received by the shareholder and then
used to purchase shares or units of the Fund, another Goldman Sachs Fund or an
ILA Portfolio.
 
  Each Fund intends that all or substantially all of its net investment income
and net realized capital gains, after reduction by available capital losses,
including any capital losses carried forward from prior years, will be
declared as dividends for each taxable year. In the case of the Core Fixed
Income, Global Income and High Yield Funds, net loss, if any, from certain
foreign currency transactions or instruments that is otherwise taken into
account in calculating net investment income or net realized capital gains for
accounting purposes may not be taken into account in determining the amount of
dividends to be declared and paid, with the result that a portion of the
Fund's dividends may be treated as a return of capital, nontaxable to the
extent of a shareholder's tax basis in his shares. Each Fund (other than the
Global Income Fund) will declare dividends daily and pay dividends monthly.
The Global Income Fund will declare and pay dividends monthly. All of the
Funds will pay dividends from net realized capital gains, reduced by available
capital losses, at least annually. From time to time a portion of any Fund's
dividends may constitute a return of capital.
 
  At the time of an investor's purchase of shares of a Fund a portion of the
net asset value per share may be represented by undistributed income (in the
case of the Global Income Fund) or realized or unrealized appreciation of any
Fund's portfolio securities. Therefore, subsequent distributions on such
shares from such income or realized appreciation may be taxable to the
investor even if the net asset value of the investor's shares is, as a result
of the distributions, reduced below the cost of such shares and the
distributions (or portions thereof) represent a return of a portion of the
purchase price.
 
                                      58
<PAGE>
 
 
                                NET ASSET VALUE
 
  The net asset value per share of each class of a Fund is calculated by the
Fund's custodian as of the close of regular trading on the New York Stock
Exchange (normally, but not always, 3:00 p.m. Chicago time, 4:00 p.m. New York
time) on each Business Day (as such term is defined under "Additional
Information") immediately after the determination, if any, of the income to be
declared as a dividend (except in the case of the Global Income Fund). Net
asset value per share of each class is calculated by determining the net
assets of each class and dividing by the number of outstanding shares of that
class.
 
  Each Fund's portfolio securities for which accurate market quotations are
readily available are valued on the basis of quotations, which may be
furnished by a pricing service or provided by dealers in such securities and
other portfolio securities are valued at fair value, based on yield
equivalents, a pricing matrix or other sources, under valuation procedures
established by the Trustees. Debt obligations with a remaining maturity of 60
days or less are valued at amortized cost. The Board of Trustees has
determined that the amortized cost of such securities approximates fair market
value.
 
 
                            PERFORMANCE INFORMATION
 
  From time to time each Fund may publish yield, distribution rate and average
annual total return and the Short Duration Tax-Free and Municipal Income Funds
may publish their tax equivalent yields in advertisements and communications
to shareholders or prospective investors. Average annual total return is
determined by computing the average annual percentage change in value of
$1,000 invested at the maximum public offering price for specified periods
ending with the most recent calendar quarter, assuming reinvestment of all
dividends and distributions at net asset value. The total return calculation
assumes a complete redemption of the investment at the end of the relevant
period. Total return calculations for Class A shares reflect the effect of
paying the maximum initial sales charge. Investment at a lower sales charge
would result in higher performance figures. Total return calculations for
Class B and Class C shares reflect deduction of the applicable CDSC imposed
upon redemption of Class B and Class C shares held for the applicable period.
Each Fund may also from time to time advertise total return on a cumulative,
average, year-by-year or other basis for various specified periods by means of
quotations, charts, graphs or schedules. In addition, each Fund may furnish
total return calculations based on investments at various sales charge levels
or at net asset value. Any performance information which is based on a Fund's
net asset value per share would be reduced if a sales charge were taken into
account. In addition to the above, each Fund may from time to time advertise
its performance relative to certain averages, performance rankings, indices,
other information prepared by recognized mutual fund statistical services and
investments for which reliable performance information is available.
 
  Yield is computed by dividing net investment income earned during a recent
thirty-day period by the product of the average daily number of shares
outstanding and entitled to receive dividends during the period and the
maximum offering price per share on the last day of the relevant period. The
results are compounded on a bond equivalent (semi-annual) basis and then
annualized. Net investment income per share is equal to the dividends and
interest earned during the period, reduced by accrued expenses for the period.
The calculation of net investment income for these purposes may differ from
the net investment income determined for accounting purposes.
 
                                      59
<PAGE>
 
  Tax equivalent yield represents the yield an investor would have to earn to
equal, after taxes, the tax-free yield of the Short Duration Tax-Free or the
Municipal Income Funds. Tax equivalent yield is calculated by dividing the
applicable Fund's tax-exempt yield by one minus a stated federal tax rate.
 
  Quotations of distribution rates are calculated by annualizing the most
recent distribution of net investment income for a monthly, quarterly or other
relevant period and dividing this amount by the net asset value per share or
maximum public offering price on the last day of the period for which the
distribution rates are being calculated.
 
  Each Fund's yield, total return and distribution rate will be calculated
separately for each class of shares in existence. Because each class of shares
may be subject to different expenses, the yield, total return and distribution
rate calculations with respect to each class of shares for the same period
will differ. The investment performance of the Class A, Class B and Class C
shares will be affected by the payment of a sales charge and distribution and
service fees and other class specific expenses. See "Shares of the Trust."
 
  The Fund's performance quotations do not reflect any fees charged by an
Authorized Dealer to its customer accounts in connection with investments in
the Funds. The investment results of a Fund will fluctuate over time and any
presentation of investment results for any prior period should not be
considered a representation of what an investment may earn or what the Fund's
performance may be in any future period. In addition to information provided
in shareholder reports, the Funds may, in their discretion, from time to time,
make a list of their holdings available to investors upon request.
 
 
                              SHARES OF THE TRUST
 
  Each Fund is a series of the Goldman Sachs Trust, which was formed under the
laws of the State of Delaware on January 28, 1997. The Funds were formerly
series of Goldman Sachs Trust, a Massachusetts business trust, and were
reorganized into the Trust as of April 30, 1997. The Trustees have authority
under the Trust's Declaration of Trust to create and classify shares of
beneficial interest in separate series, without further action by
shareholders. Additional series may be added in the future. The Trustees also
have authority to classify or reclassify any series or portfolio of shares
into one or more classes.
 
  When issued, shares are fully paid and non-assessable. In the event of
liquidation, shareholders are entitled to share pro rata in the net assets of
the applicable Fund available for distribution to such shareholders. All
shares are freely transferable and have no preemptive, subscription or
conversion rights. Shareholders are entitled to one vote per share, provided
that at the option of the Trustees, shareholders will be entitled to a number
of votes based upon the net asset values represented by their shares.
 
  The Trust does not intend to hold annual meetings of shareholders. However,
recordholders may, under certain circumstances, as permitted by the Act,
communicate with other shareholders in connection with requiring a special
meeting of shareholders. The Trustees will call a special meeting for the
purpose of electing Trustees if, at any time, less than a majority of Trustees
holding office at the time were elected by shareholders.
 
  In the interest of economy and convenience, the Trust does not issue
certificates representing the Funds' shares. Instead, the Transfer Agent
maintains a record of each shareholder's ownership. Each shareholder
 
                                      60
<PAGE>
 
receives confirmation of purchase and redemption orders from the Transfer
Agent. Fund shares and any dividends and distributions paid by the Funds are
reflected in account statements from the Transfer Agent.
 
  As of February 1, 1998, the shareholders listed below owned beneficially and
of record 25% or more of the outstanding shares of the following Fund: Short
Duration Government Fund--State Street Bank and Trust Company, P.O. Box 1992,
Boston, MA 02105-1992 (29.64%); Core Fixed Income Fund--Vinson and Elkins
Lawyers, Retirement Plan, Texas Commerce Bank N.A., P.O. Box 2550, Houston, TX
77252-2558 (25.48%).
 
 
                                   TAXATION
 
FEDERAL TAXES
 
  Each Fund is treated as a separate entity for tax purposes, has elected to
be treated as a regulated investment company and intends to qualify for such
treatment for each taxable year under Subchapter M of the Code. To qualify as
such, a Fund must satisfy certain requirements relating to the sources of its
income, diversification of its assets and distribution of its income to
shareholders. As a regulated investment company, a Fund will not be subject to
federal income or excise tax on any net investment income and net realized
capital gains that are distributed to its shareholders in accordance with
certain timing requirements of the Code.
 
  The Short Duration Tax-Free and Municipal Income Funds intend to satisfy
certain requirements of the Code so that they may distribute the tax-exempt
interest they receive as "exempt-interest dividends," as defined in the Code.
If such requirements are satisfied, distributions of the Short Duration Tax-
Free and Municipal Income Funds that are attributable to interest on tax-
exempt obligations and that the Funds properly designate as exempt-interest
dividends will be exempt from regular federal income tax, although all or a
portion of these distributions may be subject to the federal alternative
minimum tax and may be includable in the tax base for determining taxability
of social security or railroad retirement benefits. Persons who are
"substantial users" (or related persons to such substantial users) of
facilities financed by industrial development or certain private activity
bonds should consult their own tax advisers before purchasing shares of the
Short Duration Tax-Free and Municipal Income Funds. Interest on indebtedness
incurred or continued to purchase or carry shares of the Short Duration Tax-
Free and Municipal Income Funds is not deductible to the extent attributable
to the Funds' distributions that are exempt-interest dividends.
 
  Dividends paid by a Fund from net investment income, certain net realized
foreign exchange gains, the excess of net short-term capital gain over net
long-term capital loss and original issue discount or market discount income
will be taxable to shareholders as ordinary income, except for any exempt-
interest dividends paid by the Short Duration Tax-Free and Municipal Income
Funds, as described above. Distributions out of the net capital gain (the
excess of net long-term capital gain over net short-term capital loss), if
any, of a Fund, will be taxed to shareholders as long-term capital gains,
regardless of the length of time a shareholder has held his or her shares or
whether such gain was reflected in the price paid for the shares. These tax
consequences will apply whether distributions are received in cash or
reinvested in shares. Certain distributions paid by a Fund in January of a
given year may be taxable to shareholders as if received the prior December
31. Shareholders will be informed annually about the amount and character of
distributions received from the Funds for federal income tax purposes.
 
                                      61
<PAGE>
 
  Investors should consider the tax implications of buying shares immediately
prior to a distribution. Investors who purchase shares shortly before the
record date for a distribution other than a daily dividend will pay a per
share price that includes the value of the anticipated distribution and will
be taxed on any taxable distribution even though the distribution represents a
return of a portion of the purchase price.
 
  Redemptions and exchanges of shares are taxable events.
 
  Individuals and certain other classes of shareholders may be subject to 31%
backup withholding of federal income tax on distributions (other than exempt-
interest dividends), redemptions and exchanges if they fail to furnish their
correct taxpayer identification number and certain certifications required by
the Internal Revenue Service or if they are otherwise subject to backup
withholding. Individuals, corporations and other shareholders that are not
U.S. persons under the Code are subject to different tax rules and may be
subject to nonresident alien withholding at the rate of 30% (or a lower rate
provided by an applicable tax treaty) on amounts treated as ordinary dividends
from the Funds.
 
  The Core Fixed Income, Global Income and High Yield Funds may be subject to
foreign withholding or other foreign taxes on income or gain from certain
foreign securities. In general, a Fund may deduct these taxes in computing its
taxable income, if any. As an alternative, if more than 50% of the value of
the total assets of the Global Income Fund is composed of securities of
foreign corporations at the end of its taxable year and the Fund so elects,
the Fund's shareholders will include in their gross incomes (in addition to
dividends and distributions they receive) their pro rata shares of qualified
foreign taxes paid by the Fund and may be entitled under the Code to claim
foreign tax credits or deductions with respect to such taxes.
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local
or foreign taxes on payments received from the Funds, including exempt-
interest dividends. A state income (and possibly local income and/or
intangible property) tax exemption is generally available to the extent (if
any) a Fund's distributions are derived from interest on (or, in the case of
intangible property taxes, the value of its assets is attributable to) certain
U.S. government obligations and/or tax-exempt municipal obligations issued by
or on behalf of the particular state or a political subdivision thereof,
provided in some states that certain thresholds for holdings of such
obligations and/or reporting requirements are satisfied. For a further
discussion of certain tax consequences of investing in shares of the Funds,
see "Taxation" in the Additional Statement. Shareholders are urged to consult
their own tax advisers regarding specific questions as to federal, state and
local taxes as well as to any foreign taxes.
 
 
                            ADDITIONAL INFORMATION
 
  As used in this Prospectus, the term "Business Day" means any day the New
York Stock Exchange is open for trading, which is Monday through Friday except
for holidays. The New York Stock Exchange is closed on the following holidays:
New Year's Day, Martin Luther King, Jr. Day, Presidents' Day (observed), Good
Friday, Memorial Day (observed), Independence Day, Labor Day, Thanksgiving Day
and Christmas Day.
 
                                      62
<PAGE>
 
 
                                   APPENDIX
 
                            STATEMENT OF INTENTION
    (APPLICABLE ONLY TO CLASS A SHARES PURCHASED SUBJECT TO A SALES CHARGE)
 
  If a shareholder anticipates purchasing $100,000 ($500,000 in the case of
the Adjustable Rate Government Fund and $250,000 in the case of Short Duration
Government and Short Duration Tax-Free Funds) or more of Class A shares of a
Fund alone or in combination with Class A shares of another Fund or another
Goldman Sachs Fund within a 13-month period, the shareholder may obtain Class
A shares of the Fund at the same reduced sales charge as though the total
quantity were invested in one lump sum by filing this Statement of Intention
incorporated by reference in the Account Application. Income dividends and
capital gain distributions taken in additional shares will not apply toward
the completion of this Statement of Intention.
 
  To ensure that the reduced price will be received on future purchases, the
investor must inform Goldman Sachs that this Statement of Intention is in
effect each time shares are purchased. Subject to the conditions mentioned
below, each purchase will be made at the public offering price applicable to a
single transaction of the dollar amount specified on the Account Application.
The investor makes no commitment to purchase additional shares, but if the
investor's purchases within 13 months plus the value of shares credited toward
completion do not total the sum specified, the investor will pay the increased
amount of the sales charge prescribed in the Escrow Agreement.
 
                               ESCROW AGREEMENT
 
  Out of the initial purchase (or subsequent purchases if necessary) 5% of the
dollar amount specified on the Account Application shall be held in escrow by
the Transfer Agent in the form of shares registered in the investor's name.
All income dividends and capital gains distributions on escrowed shares will
be paid to the investor or to his order. When the minimum investment so
specified is completed (either prior to or by the end of the thirteenth
month), the investor will be notified and the escrowed shares will be
released. In signing the Account Application, the investor irrevocably
constitutes and appoints the Transfer Agent his attorney to surrender for
redemption any or all escrowed shares with full power of substitution in the
premises.
 
  If the intended investment is not completed, the investor will be asked to
remit to Goldman Sachs any difference between the sales charge on the amount
specified and on the amount actually attained. If the investor does not within
20 days after written request by Goldman Sachs pay such difference in the
sales charge, the Transfer Agent will redeem an appropriate number of the
escrowed shares in order to realize such difference. Shares remaining after
any such redemption will be released by the Transfer Agent.
 
                                      A-1
<PAGE>
 
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GOLDMAN SACHS ASSET
MANAGEMENT
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN SACHS FUNDS
MANAGEMENT, L.P.
ONE NEW YORK PLAZA
NEW YORK, NEW YORK 10004
 
GOLDMAN SACHS ASSET
MANAGEMENT INTERNATIONAL
133 PETERBOROUGH COURT
LONDON, ENGLAND EC4A 2BB
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR
85 BROAD STREET
NEW YORK, NEW YORK 10004
 
GOLDMAN, SACHS & CO.
TRANSFER AGENT
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CHICAGO, ILLINOIS 60606
 
STATE STREET BANK AND TRUST COMPANY
CUSTODIAN
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INDEPENDENT PUBLIC ACCOUNTANTS
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BOSTON, MASSACHUSETTS 02110
 
TOLL FREE (IN U.S.) . . . . . . . .  800-526-7384
 
 
FIPROABC
501419
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