GOLDMAN SACHS TRUST
497, 1995-09-27
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<PAGE>
 
                              GOLDMAN SACHS TRUST

                      GS Short-Term Government Agency Fund
                              Institutional Shares
                             Administration Shares
                                 Service Shares
                              dated March 1, 1995

          Supplement dated September 29, 1995 to the above Prospectus

The following is inserted after the third full paragraph on page 15 of the
Prospectus:

Futures Contracts and Options on Futures Contracts.  To hedge against changes in
interest rates or securities prices or to seek to increase total return, the
Fund may purchase and sell various kinds of futures contracts, and purchase and
write call and put options on any of such futures contracts.  The 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.

     The Fund may not purchase or sell futures contracts or purchase or sell
related options 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.  Transactions in
futures contracts and options on futures involve brokerage costs, require margin
deposits and, in the case of contracts and options obligating the Fund to
purchase securities, require the Fund to segregate cash and liquid, high-grade
debt securities with a value equal to the amount of the Fund's obligations.

     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 the Fund may benefit from
the use of futures and options on futures, unanticipated changes in interest
rates or securities prices may result in a poorer overall performance for the
Fund than if it had not entered into any futures contracts or options
transactions.  The loss incurred by the Fund in writing options on futures is
potentially unlimited and may exceed the amount of the premium received.
<PAGE>
 
     The use of futures may increase the volatility of the Fund's net asset
value.  The profitability of the Fund's trading in futures to increase total
return will depend on the Investment Adviser's ability to correctly analyze 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 Fund.  Further, futures trading
may be illiquid, and exchanges may limit fluctuations in futures contract prices
during a single day.

     In the event of an imperfect correlation between a futures position and a
portfolio position which is intended to be protected, the desired protection may
not be obtained and the Fund may be exposed to risk of loss.  Perfect
correlation between the Fund's futures positions and portfolio positions will be
impossible to achieve.  The Fund's transactions in options and futures contracts
may be limited by the requirements of the Internal Revenue Code for
qualification as a regulated investment company.

     Risks of Derivative Transactions.   The Fund's transactions in interest
rate swaps, caps, floors, options, futures and options on futures 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 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.
<PAGE>
 
                                 GS SHORT-TERM
                             GOVERNMENT AGENCY FUND
                              INSTITUTIONAL SHARES
 
                                   MANAGED BY
 
 
                      GOLDMAN SACHS FUNDS MANAGEMENT, L.P.
                                AN AFFILIATE OF
                              GOLDMAN, SACHS & CO.
 
                                  ------------
 
  GS Short-Term Government Agency Fund (the "Fund") is one fund in a family of
funds advised by Goldman Sachs Funds Management, L.P. (the "Investment
Adviser") or its affiliates, Goldman Sachs Asset Management and Goldman Sachs
Asset Management International. The Fund is organized as a separate diversified
portfolio of Goldman Sachs Trust (the "Trust"), an open-end, management
investment company.
 
  The Fund's objective is to achieve a high level of current income.
Secondarily, the Fund may, in seeking current income, also consider the
potential for capital gain. The Fund pursues its objectives through investment
in securities issued or guaranteed by the U.S. Government, its agencies or
instrumentalities and repurchase agreements pertaining thereto. These
securities may include mortgage pass-through securities and other securities
representing an interest in or collateralized by mortgages. Under normal
circumstances, substantially all of the Fund's assets will be invested in
securities issued or guaranteed by the U.S. Government, its agencies or
instrumentalities.
 
  Goldman Sachs Funds Management, L.P., New York, New York, an affiliate of
Goldman, Sachs & Co., serves as the Fund's investment adviser. Goldman, Sachs &
Co. serves as the Fund's distributor and transfer agent. The Trust's custodian
is State Street Bank and Trust Company.
 
  This Prospectus, which sets forth concisely the information about the Trust
and the Fund that a prospective investor ought to know before investing in
Institutional Shares, should be retained for future reference. A Statement of
Additional Information (the "Additional Statement"), dated March 1, 1995,
containing further information about the Trust and the Fund which may be of
interest to investors, has been filed with the Securities and Exchange
Commission, is incorporated herein by reference in its entirety, and may be
obtained without charge from Goldman, Sachs & Co. by calling the telephone
number, or writing to one of the addresses, listed below.
 
INSTITUTIONAL SHARES OF THE FUND 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 INSTITUTIONAL
SHARES OF THE 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.
 
GOLDMAN SACHS TRUST                   GOLDMAN SACHS FUNDS MANAGEMENT, L.P.
4900 SEARS TOWER                      INVESTMENT ADVISER
CHICAGO, ILLINOIS 60606               ONE NEW YORK PLAZA
                                      NEW YORK, NEW YORK 10004
 
 
GOLDMAN, SACHS & CO.                  GOLDMAN, SACHS & CO.   
DISTRIBUTOR                           TRANSFER AGENT         
85 BROAD STREET                       4900 SEARS TOWER       
NEW YORK, NEW YORK 10004              CHICAGO, ILLINOIS 60606 
                                      
 
TOLL FREE (IN U.S.).................. 800-621-2550
 
                 The date of this Prospectus is March 1, 1995.
<PAGE>
 
 
                                    SUMMARY
 
                                  INTRODUCTION
 
  GS Short-Term Government Agency Fund (the "Fund") is one fund in a family of
funds advised by Goldman Sachs Funds Management, L.P. (the "Investment
Adviser") or its affiliates, Goldman Sachs Asset Management and Goldman Sachs
Asset Management International. The Fund is organized as a separate diversified
portfolio of Goldman Sachs Trust (the "Trust"), an open-end, management
investment company.
 
                       INVESTMENT OBJECTIVE AND POLICIES
 
  The Fund's objective is to achieve a high level of current income.
Secondarily, the Fund may, in seeking current income, also consider the
potential for capital gain. The Fund invests exclusively in (a) securities
issued or guaranteed as to principal and interest by the U.S. Government, its
agencies or instrumentalities ("U.S. Government securities") deemed to have
remaining maturities or (in the case of mortgage-related securities) estimated
average lives of 6 years or less, and (b) repurchase agreements pertaining
thereto. The Fund will invest, under normal market conditions, at least 65% of
its total assets in securities issued by U.S. Government agencies or
instrumentalities and in repurchase agreements pertaining to U.S. Government
securities. The U.S. Government securities in which the Fund may invest include
mortgage-related securities. Under normal circumstances, substantially all of
the Fund's assets will be invested in securities issued or guaranteed by the
U.S. Government, its agencies or instrumentalities.
 
  The Fund may employ certain active management techniques to hedge the
interest rate risks associated with the Fund's portfolio securities, to enhance
its return and to seek to reduce fluctuation in its net asset value. These
include, but are not limited to, mortgage and interest rate swaps and interest
rate floors, caps and collars. The Fund may also utilize portfolio securities
lending, mortgage dollar rolls and repurchase agreements in an attempt to
enhance the return achieved by the Fund. See "Investment Objective and
Policies" and "Other Investments and Practices." There can be no assurance that
the Fund will achieve its investment objective.
 
  The Fund may, for temporary defensive purposes, hold or invest more than 35%
of its total assets in cash, U.S. Treasury securities or high quality money
market instruments, including commercial paper, bankers' acceptances,
repurchase agreements or other debt obligations with a remaining maturity of
one year or less. The Fund will maintain a dollar weighted average portfolio
maturity (as defined below) of 3 years or less.
 
                               INVESTMENT ADVISER
 
  Pursuant to an Investment Advisory Agreement, Goldman Sachs Funds Management,
L.P., an affiliate of Goldman, Sachs & Co. ("Goldman Sachs"), serves as the
Fund's investment adviser. In this capacity, the Investment Adviser provides
investment advisory and administrative services and receives from the Fund a
monthly fee equal on an annual basis to 0.50% of the Fund's average daily net
assets. Goldman Sachs Funds Management, L.P. is registered with the Securities
and Exchange Commission (the "SEC") as an investment adviser. See "Investment
Adviser" and "Management--Investment Adviser."
 
                                       2
<PAGE>
 
 
                PURCHASE AND REDEMPTION OF INSTITUTIONAL SHARES
 
  The minimum initial investment is $50,000 in Institutional Shares of the 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 relevant class of any portfolio of Goldman Sachs Money Market Trust.
Institutional Shares of the Fund may be purchased through Goldman Sachs at the
current net asset value per share without the imposition of a sales load. See
"Purchase of Institutional Shares." The Fund will redeem its Institutional
Shares upon request of a shareholder on any Business Day at the net asset value
next determined after receipt of such request in proper form. See "Redemption
of Institutional Shares."
 
                         DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs serves as the distributor to and transfer agent for the Fund.
Under the Distribution Agreement with the Fund, Goldman Sachs acts as exclusive
agent for the Fund in the sale of shares. Under the Transfer Agency Agreement
with the Fund, Goldman Sachs provides transfer agency services and responds to
shareholder inquiries. See "Management--Distributor and Transfer Agent."
 
                                  RISK FACTORS
 
  INVESTMENT IN MORTGAGE-BACKED SECURITIES GENERALLY. The Fund's investments in
mortgage pass-through securities and other securities representing an interest
in or collateralized by adjustable-rate and fixed-rate mortgage loans
("Mortgage-Backed Securities") entail certain risks. These risks include the
failure of an issuer or guarantor to meet its obligations, adverse interest
rate changes, adverse economic, real estate or unemployment trends, failures in
connection with processing of transactions and the effects of prepayments on
mortgage cash flows. The Fund's policy of investing in securities issued by
U.S. Government agencies or instrumentalities is designed, however, to minimize
credit and performance related risks otherwise associated with Mortgage-Backed
Securities.
 
  The securities in the Fund's portfolio will tend to decrease in value when
interest rates rise and increase in value when interest rates fall. Because the
Fund's investments are interest rate sensitive, the Fund's performance will
depend in large part upon the ability of the Fund to respond to fluctuations in
market interest rates and to utilize appropriate strategies to maximize returns
to the Fund, while attempting to minimize the associated risks to its invested
capital. Operating results will also depend upon the availability of
opportunities for the investment of the Fund's assets, including purchases and
sales of suitable securities.
 
  YIELD CHARACTERISTICS AND MARKET RISKS. The yield characteristics of the
Mortgage-Backed Securities in which the Fund may invest differ from those of
traditional fixed-income securities. The major differences typically include
more frequent interest and principal payments (usually monthly) on Mortgage-
Backed Securities, the adjustability of interest rates and the possibility that
prepayments of principal may be made at any time.
 
  Prepayment rates on Mortgage-Backed Securities are influenced by changes in
current interest rates and a variety of economic, geographic, social and other
factors and cannot be predicted with certainty. Both adjustable rate mortgage
loans and fixed rate mortgage loans may be subject to a greater rate of
 
                                       3
<PAGE>
 
principal prepayments in a declining interest rate environment and to a lesser
rate of principal prepayments in an increasing interest rate environment. Under
certain interest rate and prepayment scenarios, the Fund may fail to recoup
fully its investment in some of the Mortgage-Backed Securities it holds
notwithstanding a direct or indirect governmental or agency guarantee. The Fund
intends to use hedging techniques to control this risk. See "Investment
Objective and Policies" and "Other Investments and Practices." When the Fund
reinvests amounts representing scheduled payments and unscheduled prepayments
of principal, it may receive a rate of interest that is lower than the rate on
its existing portfolio of mortgage pass-through securities. Thus, Mortgage-
Backed Securities, and adjustable rate mortgage pass-through securities in
particular, may be less effective than other types of U.S. Government
securities as a means of "locking in" interest rates.
 
  OTHER INVESTMENTS AND PRACTICES. The Fund may invest in other instruments,
including direct obligations of the United States, and notes, bonds and
discount notes of U.S. Government agencies or instrumentalities. The Fund may
engage in certain other investment practices that also involve special risks.
These include, but are not limited to, the use of mortgage and interest rate
swaps and interest rate floors, caps and collars, making forward commitments,
lending portfolio securities, entering into mortgage dollar rolls and
repurchase agreements. See "Other Investments and Practices."
 
  CONFLICTS OF INTEREST. The involvement of Goldman Sachs, its divisions and
affiliates (including the Investment Adviser), partners and officers, in the
investment activities and business operations of the Fund may present certain
conflicts of interest, as described under "Management--Investment Adviser."
 
                                DIVIDEND POLICY
 
  The Fund intends that substantially all of its net investment income will be
declared as a dividend daily to shareholders of record as of 3:00 p.m. Chicago
time on that day and will be paid monthly. Over the course of the fiscal year,
dividends accrued and paid will constitute all or substantially all of the
Fund's net investment income. From time to time a portion of such dividends may
constitute a return of capital. The Fund also intends that any net realized
capital gains, if any, after offset by any available capital loss carryforwards
from prior taxable years, will be declared as a dividend at least annually.
Shareholders will receive dividends in additional Institutional Shares of the
Fund or may elect to receive cash as described under "Dividends."
 
                                       4
<PAGE>
 
 
                               FEES AND EXPENSES
                            (INSTITUTIONAL SHARES)*
 
<TABLE>
<CAPTION>
                                                             GS SHORT-TERM
                                                         GOVERNMENT AGENCY FUND
                                                         ----------------------
<S>                                                      <C>
SHAREHOLDER TRANSACTION EXPENSES:
    Maximum Sales Load Imposed on Purchases.............          None
    Maximum Sales Load Imposed on Reinvested Dividends..          None
    Redemption Fees.....................................          None
    Exchange Fees.......................................          None
ANNUAL FUND OPERATING EXPENSES:
(AS A PERCENTAGE OF AVERAGE NET ASSETS)
    Management Fees (after waiver)......................          0.40%**
    Distribution (Rule 12b-1) Fees......................          None
    Other Expenses (after expense limitation)...........          0.05%**
                                                                  ----
        TOTAL FUND OPERATING EXPENSES (AFTER EXPENSE
         LIMITATION)....................................          0.45%**
                                                                  ====
</TABLE>
 
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             5 YEARS             10 YEARS
                         ------             -------             -------             --------
                         <S>                <C>                 <C>                 <C>                 
                           $5                 $14                 $25                  $57
</TABLE>
- --------
 * The information set forth in the foregoing table and hypothetical example    
   relates only to Institutional Shares of the Fund. See "Shares of the Trust." 
   Administration Shares and Service Shares of the Fund are subject to          
   different fees and expenses. Administration Shares are subject to an         
   administration fee of up to 0.25% of average daily net assets. Service       
   Shares are subject to a service fee of up to 0.50% of average daily net      
   assets. All other expenses related to Administration Shares and Service      
   Shares are the same as for Institutional Shares.
** The Investment Adviser agreed that a portion of its advisory fee (0.10% on
   an annual basis) would not be imposed on the Fund and that it would reduce 
   or limit certain "Other Expenses" of the Fund (excluding advisory fees,    
   payments to Service Organizations (as defined below), taxes, interest and  
   brokerage and litigation, indemnification and other extraordinary expenses) 
   to the extent such expenses exceeded 0.05% per annum of the Fund's average 
   net assets. Had the reduction of the advisory fee and the expense          
   limitation not been reflected in the above table, the management fees,     
   other expenses and total operating expenses attributable to Institutional  
   Shares of the Fund would have been 0.50%, 0.09% and 0.59%, respectively.   
   The foregoing table and example also reflect current operating expenses    
   that will be applicable on an ongoing basis. See "Management--Investment   
   Adviser."                                                                   
 
   The purpose of the foregoing table is to assist investors in understanding
the various costs and expenses of the Fund that an investor in the Fund will
bear directly or indirectly. The costs and expenses
 
                                       5
<PAGE>
 
included in the table and hypothetical example above 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, the Fund's actual performance will vary and may result in an
actual return greater or less than 5%. See "Management--Investment Adviser."
 
                                       6
<PAGE>
 
                             FINANCIAL HIGHLIGHTS
         SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD
 
  The following data with respect to Institutional Shares and Administration
Shares of the Fund outstanding during the periods indicated has been audited
by Arthur Andersen LLP, independent public accountants, as indicated in their
report incorporated by reference and attached to the Additional Statement from
the Fund's annual report to shareholders for the fiscal year ended October 31,
1994 (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
writing to any of the addresses on the cover of this Prospectus.
 
<TABLE>
<CAPTION>
                                                                              DISTRIBUTIONS TO
                           INCOME FROM INVESTMENT OPERATIONS                    SHAREHOLDERS
                           -------------------------------------   ----------------------------------------
                                                                               IN
                                           NET          TOTAL                EXCESS       FROM                  NET
                 NET ASSET   NET       REALIZED AND     INCOME     FROM NET  OF NET   NET REALIZED             ASSET
                 VALUE AT  INVEST-      UNREALIZED       FROM      INVEST-   INVEST-    GAIN ON      FROM    VALUE AT
                 BEGINNING  MENT       GAIN (LOSS)    INVESTMENT     MENT     MENT     INVESTMENT  PAID-IN      END      TOTAL
                 OF PERIOD INCOME     ON INVESTMENTS  OPERATIONS    INCOME   INCOME   TRANSACTIONS CAPITAL   OF PERIOD RETURN(B)
                 --------- -------    --------------  ----------   --------  -------  ------------ --------  --------- ---------
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
<S>              <C>       <C>        <C>             <C>          <C>       <C>      <C>          <C>       <C>       <C>
1994-
Institutional
shares..........  $10.14   $0.5628(f)    $(0.4592)(f)  $0.1036(f)  $(0.5598)     --     $(0.0438)       --     $9.64      0.99%
1994-
Administration
shares..........   10.14    0.5329(f)     (0.4539)(f)   0.0790(f)   (0.5352)     --      (0.0438)       --      9.64      0.73
1993-Institu-
tional shares...   10.16    0.5627        (0.0135)(a)   0.5492      (0.5627) (0.0065)        --         --     10.14      5.55
1993-
Administration
shares(d).......   10.23    0.2725        (0.0900)(a)   0.1825      (0.2725)     --          --         --     10.14      1.74
1992-Institu-
tional shares...   10.22    0.6703        (0.0600)(a)   0.6103      (0.6703)     --          --         --     10.16      6.24
1991-Institu-
tional shares...   10.00    0.8020         0.2200 (a)   1.0220      (0.8020)     --          --         --     10.22     10.93
1990-Institu-
tional shares...   10.07    0.8300        (0.0700)(a)   0.7600      (0.8300)     --          --         --     10.00      8.23
1989-Institu-
tional shares...   10.10    0.8800            --        0.8800      (0.8800)     --          --     (0.0300)   10.07      9.08
<CAPTION> 
FOR THE PERIOD AUGUST 15, 1988 (COMMENCEMENT OF OPERATIONS) THROUGH OCTOBER 31,
- -------------------------------------------------------------------------------
<S>              <C>       <C>        <C>             <C>          <C>       <C>      <C>          <C>       <C>       <C>
1988-Institu-
tional Shares...   10.00    0.1800         0.1000       0.2800      (0.1800)     --          --         --     10.10      3.30
<CAPTION>
                                                                  RATIOS ASSUMING NO
                                                                  WAIVER OF FEES OR
                                                                  EXPENSE LIMITATION
                                                               ------------------------
                               RATIO OF                 NET
                                 NET                 ASSETS AT  RATIO OF   RATIO OF NET
                 RATIO OF NET INVESTMENT                END    EXPENSES TO  INVESTMENT
                 EXPENSES TO  INCOME TO  PORTFOLIO   OF PERIOD   AVERAGE    INCOME TO
                 AVERAGE NET   AVERAGE   TURNOVER       (IN        NET     AVERAGE NET
                    ASSETS    NET ASSETS  RATE(C)     000'S)     ASSETS       ASSETS
                 ------------ ---------- ----------- --------- ----------- ------------
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
<S>              <C>          <C>        <C>         <C>       <C>         <C>
1994-
Institutional
shares..........     0.45%       5.69%    289.79%    $193,095     0.59%        5.55%
1994-
Administration
shares..........     0.70        5.38     289.79          730     0.84         5.24
1993-Institu-
tional shares...     0.45        5.46     411.66      359,708     0.64         5.31
1993-
Administration
shares(d).......     0.70(e)     4.84(e)  411.66       16,490     0.80(e)      4.74(e)
1992-Institu-
tional shares...     0.45        6.60     216.07      277,927     0.69         6.36
1991-Institu-
tional shares...     0.45        8.25     155.44      158,848     0.79         7.91
1990-Institu-
tional shares...     0.45        8.62     173.21       68,995     0.95         8.12
1989-Institu-
tional shares...     0.46        8.71     137.37       31,015     1.39         7.78
<CAPTION> 
FOR THE PERIOD AUGUST 15, 1988 (COMMENCEMENT OF OPERATIONS) THROUGH OCTOBER 31,
- -------------------------------------------------------------------------------
<S>              <C>          <C>        <C>         <C>       <C>         <C>
1988-Institu-
tional Shares...     0.55(e)     8.55(e)  167.00(e)    39,052     1.42(e)      7.68(e)
</TABLE>
- ----
(a) Includes balancing effect of calculating per share amounts.
(b) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions and a complete redemption
    of the investment at the net asset value at the end of the period.
(c) Includes effect of mortgage dollar roll transactions.
(d) Administration share activity commenced on April 15, 1993.
(e) Annualized.
(f) Calculated based on the average shares outstanding methodology.
 
                                       7
<PAGE>
 
                       INVESTMENT OBJECTIVE AND POLICIES
 
  The Fund seeks to achieve a high level of current income. Secondarily, the
Fund may, in seeking current income, also consider the potential for capital
gain. There can be no assurance that the objective of the Fund will be
realized.
 
  SELECTION OF PORTFOLIO INVESTMENTS. The Fund invests exclusively in (a)
securities issued or guaranteed as to principal and interest by the U.S.
Government, its agencies or instrumentalities ("U.S. Government securities")
deemed to have remaining maturities or (in the case of mortgage-related
securities) estimated average lives of six years or less and (b) repurchase
agreements collateralized by U.S. Government Securities. Under normal market
conditions, the Fund will invest at least 65% of its total assets in securities
issued by U.S. Government agencies or instrumentalities and in repurchase
agreements pertaining to U.S. Government securities. Under normal
circumstances, substantially all of the Fund's assets will be invested in
securities issued or guaranteed by the U.S. Government, its agencies or
instrumentalities. The Fund may, for temporary defensive purposes, hold or
invest more than 35% of its total assets in cash, U.S. Treasury securities or
high quality money market instruments, including commercial paper, bankers'
acceptances, repurchase agreements or other debt obligations with a remaining
maturity of one year or less.
 
  PORTFOLIO DURATION. The Fund will maintain an option-adjusted duration of not
more than 3 years, however, its actual option-adjusted duration is expected to
be approximately 2 years under normal interest rate conditions. The Fund's
duration is a measure of the price sensitivity of the portfolio, including
expected cash flow and mortgage prepayments under a wide range of interest rate
scenarios. Maturity measures only the time until final payment is due on a bond
or other debt security; it takes no account of the pattern of a security's cash
flows over time, including how cash flow is affected by prepayments and by
changes in interest rates. In computing the duration of its portfolio, the Fund
will have to 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. The Fund may use various
techniques to shorten or lengthen the option-adjusted duration of its
portfolio, including the acquisition of debt obligations at a premium or
discount, mortgage and interest rate swaps and interest rate floors, caps and
collars.
 
  OTHER INVESTMENT POLICIES. The Fund may also employ certain active management
techniques to hedge the interest rate risks associated with the Fund's
portfolio securities, to enhance its return and to seek to reduce fluctuation
in its net asset value. These techniques include, but are not limited to,
mortgage and interest rate swaps and interest rate floors, caps and collars.
The Fund may also employ other investment techniques to enhance returns, such
as loans of portfolio securities, mortgage dollar rolls, forward commitments
and repurchase agreements.
 
  When interest rates decline, the value of a portfolio invested in fixed-rate
debt securities can be expected to rise. Conversely, when interest rates rise,
the value of a portfolio invested in fixed-rate debt securities can be expected
to decline. In contrast, since interest rates on adjustable-rate mortgage loans
are reset periodically, yields of portfolio securities representing interests
in such loans will gradually align themselves to reflect changes in market
interest rates, causing the value of such adjustable-rate securities to
fluctuate less dramatically in response to interest rate fluctuations than
would fixed-rate debt securities. The Investment Adviser expects the Fund's net
asset value to be relatively stable during normal market conditions. This is
because the Fund will maintain a maximum option-adjusted duration of not more
than 3 years and will utilize certain interest rate hedging techniques.
However, a sudden and extreme increase
 
                                       8
<PAGE>
 
in prevailing interest rates may cause a decline in the Fund's net asset value.
Conversely, a sudden and extreme decline in interest rates could result in an
increase in the Fund's net asset value.
 
  The Fund's investment objective of seeking to achieve a high level of current
income and the policies specified under "Investment Restrictions" may only be
changed with the approval of the holders of a majority of the outstanding
shares of the Fund. All other policies described herein may be changed by a
vote of the Trustees. There can be no assurance that the Fund will be
successful in achieving its investment objective. An investment in shares of
the Fund does not constitute a complete investment program. Investors may wish
to complement an investment in the Fund with other types of investments.
 
                               INVESTMENT ADVISER
 
  The Fund's investment adviser is Goldman Sachs Funds Management, L.P., an
affiliate of Goldman Sachs. The management services provided by the Investment
Adviser are subject to the general supervision of the Trust's Board of
Trustees. The Investment Adviser and its affiliates serve a wide range of
clients including private and public pension funds, endowments, foundations,
banks, thrifts, insurance companies, corporations, and private investors and
family groups.
 
  Founded in 1869, Goldman Sachs is among the oldest and largest investment
banking firms in the United States. Goldman Sachs is a leader in virtually
every field of investing and financing, participating in financial markets
worldwide and serving individuals, institutions, corporations and governments.
Goldman Sachs is headquartered in New York and has offices throughout the
United States and in Beijing, Frankfurt, George Town, Hong Kong, London,
Madrid, Milan, Montreal, Osaka, Paris, Seoul, Shanghai, Singapore, Sydney,
Taipei, Tokyo, Toronto, Vancouver and Zurich.
 
  The Investment Adviser is able to draw on the research and market expertise
of Goldman Sachs, whose investment research effort is one of the largest in the
industry. The in-depth information and analyses generated by Goldman Sachs's
research analysts, economists and portfolio strategists are available to the
Investment Adviser.
 
                           SPECIAL INVESTMENT METHODS
 
U.S. GOVERNMENT SECURITIES
 
  U.S. Government securities include several different kinds of obligations.
Such securities include a variety of United States Treasury obligations,
including bills and notes, which principally differ only in their interest
rates, maturities and times of issuance, and obligations issued or guaranteed
by United States Government agencies or instrumentalities which are supported
by (a) the full faith and credit of the United States Treasury (such as
securities of the Government National Mortgage Association ("Ginnie Mae")), (b)
the authority of the United States Government to purchase certain obligations
of the issuer (such as securities of the Federal National Mortgage Association
("Fannie Mae") and the Federal Home Loan Mortgage Corporation ("Freddie Mac")),
(c) the limited authority of the issuer to borrow from the United States
Treasury (such as securities of the Student Loan Marketing Association) or (d)
only the credit of the issuer. No assurance can be given that the United States
Government will provide financial support to United States Government agencies
or instrumentalities described in clauses (b), (c) or (d) above in the future,
other than as set forth above, since it is not obligated to do so by law. U.S.
Government securities also include securities related to pools of mortgages as
discussed below.
 
                                       9
<PAGE>
 
CHARACTERISTICS OF MORTGAGE-BACKED SECURITIES
 
  Mortgage-Backed Securities are securities that directly or indirectly
represent participations in, or are collateralized by and payable from,
mortgage loans secured by real property. The investment characteristics of
adjustable and fixed rate Mortgage-Backed Securities differ from those of
traditional fixed income securities. The major differences include the payment
of interest and principal on Mortgage-Backed Securities on a more frequent
(usually monthly) schedule, and the possibility that principal may be prepaid
at any time due to prepayments on the underlying mortgage loans or other
assets. These differences can result in significantly greater price and yield
volatility than is the case with traditional fixed income securities. As a
result, if the Fund purchases Mortgage-Backed Securities at a premium, a faster
than expected prepayment rate will reduce both the market value and the yield
to maturity from those which were anticipated. A prepayment rate that is slower
than expected will have the opposite effect of increasing yield to maturity and
market value. Conversely, if the Fund purchases Mortgage-Backed Securities at a
discount, faster than expected prepayments will increase, while slower than
expected prepayments will reduce, yield to maturity and market value. The
Investment Adviser will seek to manage these potential risks and benefits by
investing in a variety of Mortgage-Backed Securities and by using certain
hedging techniques. See "Other Investments and Practices."
 
  Prepayments on a pool of mortgage loans are influenced by a variety of
factors, including economic conditions, changes in mortgagors' housing needs,
job transfers, unemployment, mortgagors' net equity in the mortgaged properties
and servicing decisions. The timing and level of prepayments cannot be
predicted. Generally, however, prepayments on adjustable rate mortgage loans
and fixed rate mortgage loans will increase during a period of falling mortgage
interest rates and decrease during a period of rising mortgage interest rates.
Accordingly, the amounts of prepayments available for reinvestment by the Fund
are likely to be greater during a period of declining mortgage interest rates.
If general interest rates also decline, such prepayments are likely to be
reinvested at lower interest rates than the Fund was earning on the Mortgage-
Backed Securities that were prepaid.
 
  GUARANTEED MORTGAGE-BACKED SECURITIES IN WHICH THE FUND INVESTS. All of the
Fund's investments in Mortgage-Backed Securities will be issued or guaranteed
by the U.S. Government or one of its agencies or instrumentalities, including
but not limited to, Ginnie Mae, Fannie Mae and Freddie Mac. Ginnie Mae
securities are backed by the full faith and credit of the U.S. Government,
which means that the U.S. Government guarantees that the interest and principal
will be paid when due. Fannie Mae securities and Freddie Mac securities are not
backed by the full faith and credit of the U.S. Government; however, the
ability of these agencies to borrow from the U.S. Treasury makes their
securities high quality securities with minimal credit risks. There are several
types of guaranteed Mortgage-Backed Securities currently available, including
guaranteed mortgage pass-through certificates and multiple-class securities,
which include guaranteed Real Estate Mortgage Investment Conduit ("REMIC")
pass-through certificates and stripped Mortgage Backed-Securities. The Fund
will be permitted to invest in other types of Mortgage-Backed Securities that
may be available in the future to the extent investment in such securities is
consistent with its investment objective and policies.
 
  MULTIPLE CLASS PASS-THROUGH SECURITIES AND COLLATERALIZED MORTGAGE
OBLIGATIONS. The Fund may invest in multiple class securities issued by U.S.
Government agencies and instrumentalities such as Fannie Mae or Freddie Mac,
including guaranteed collateralized mortgage obligations ("CMOs") and REMIC
pass-through or participation certificates. 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.
 
                                       10
<PAGE>
 
  CMOs and guaranteed REMIC pass-through certificates ("REMIC Certificates")
issued by Fannie Mae and Freddie Mac are types of multiple class pass-through
securities. Investors may purchase beneficial interests in REMICs, which are
known as "regular" interests or "residual" interests. The Fund does not intend
to purchase residual interests in CMOs or REMICs. The REMIC Certificates
represent beneficial ownership interests in a REMIC trust, generally consisting
of mortgage loans or Fannie Mae, Freddie Mac or Ginnie Mae guaranteed mortgage
pass-through certificates (the "Mortgage Assets"). The obligations of Fannie
Mae or Freddie Mac under their respective guaranty of the REMIC Certificates
are obligations solely of Fannie Mae or Freddie Mac, respectively.
 
  Fannie Mae REMIC Certificates are issued and guaranteed as to timely
distribution of principal and interest by Fannie Mae. In addition, Fannie Mae
will be obligated to distribute the principal balance of each class of REMIC
Certificates in full, whether or not sufficient funds are otherwise available.
 
  For Freddie Mac REMIC Certificates, Freddie Mac guarantees the timely payment
of interest, and also guarantees the payment of principal as payments are
required to be made on the underlying mortgage participation certificates
("PCs"). PCs represent undivided interests in specified level payment,
residential mortgages or participations therein purchased by Freddie Mac and
placed in a PC pool. With respect to principal payments on PCs, Freddie Mac
generally guarantees ultimate collection of all principal of the related
mortgage loans without offset or deduction. Freddie Mac also guarantees timely
payment of principal on certain PCs.
 
  CMOs and REMIC Certificates are issued in multiple classes. Each class of
CMOs and REMIC Certificates, often referred to as a "tranche," is issued at a
specific adjustable or fixed interest rate and must be fully retired no later
than its final scheduled distribution date. Principal prepayments on the
underlying mortgage loans or the Mortgage Assets underlying the CMOs or REMIC
Certificates may cause some or all of the classes of CMOs or REMIC Certificates
to be retired substantially earlier than their final distribution dates.
Generally, interest is paid or accrues on all classes of CMOs or REMIC
Certificates on a monthly basis.
 
  The principal of and interest on the Mortgage Assets may be allocated among
the several classes of CMOs or REMIC Certificates in various ways. In certain
structures (known as "sequential pay" CMOs or REMIC Certificates), payments of
principal, including any principal prepayments, on the Mortgage Assets
generally are applied to the classes of CMOs or REMIC Certificates in the order
of their respective final distribution dates. Thus, no payment of principal
will be made on any class of sequential pay CMOs or REMIC Certificates until
all other classes having an earlier final distribution date have been paid in
full.
 
  Additional structures of CMOs and REMIC Certificates include, among others,
"parallel pay" CMOs and REMIC Certificates. Parallel pay CMOs or REMIC
Certificates are those which are structured to apply principal payments and
prepayments of the Mortgage Assets to two or more classes concurrently on a
proportionate or disproportionate basis. These simultaneous payments are taken
into account in calculating the final distribution date of each class.
 
  A wide variety of REMIC Certificates may be issued in the parallel pay or
sequential pay structures. These securities include accrual certificates (also
known as "Z-Bonds"), which only accrue interest at a specified rate until all
other certificates having an earlier final distribution date have been retired
and are converted thereafter to an interest-paying security, and planned
amortization class ("PAC") certificates, which are parallel pay REMIC
Certificates which generally require that specified amounts of principal be
 
                                       11
<PAGE>
 
applied on each payment date to one or more classes of REMIC Certificates (the
"PAC Certificates"), even though all other principal payments and prepayments
of the Mortgage Assets are then required to be applied to one or more other
classes of the Certificates. The scheduled principal payments for the PAC
Certificates generally have the highest priority on each payment date after
interest due has been paid to all classes entitled to receive interest
currently. Shortfalls, if any, are added to the amount payable on the next
payment date. The PAC Certificate payment schedule is taken into account in
calculating the final distribution date of each class of PAC. In order to
create PAC tranches, one or more tranches generally must be created that absorb
most of the volatility in the underlying mortgage assets. These tranches tend
to have market prices and yields that are much more volatile than the PAC
classes.
 
  STRIPPED MORTGAGE-BACKED SECURITIES. The Fund may invest in stripped
mortgage-backed securities ("SMBS"), which are derivative multiple class
mortgage-backed securities. The Fund may only invest in SMBS issued or
guaranteed by the U.S. Government, its agencies or instrumentalities.
 
  SMBS are usually structured with two classes that receive different
proportions of the interest and principal distributions from a pool of Mortgage
Assets. A common type of SMBS will have one class receiving all of the interest
from the Mortgage Assets, while the other class will receive all of the
principal. However, in some instances, one class will receive some of the
interest and most of the principal while the other class will receive most of
the interest and the remainder of the principal. If the underlying Mortgage
Assets experience greater than anticipated prepayments of principal, the Fund
may fail to fully recoup its initial investment in these securities. Although
the market for such securities is increasingly liquid, certain SMBS may not be
readily marketable and will be considered illiquid for purposes of the Fund's
limitation on investments in illiquid 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 Assets 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 Investment Adviser will seek
to manage these risks (and potential benefits) by investing in a variety of
such securities and by using certain hedging techniques. See "Other Investments
and Practices."
 
ZERO COUPON BONDS
 
  The Fund may invest in zero coupon securities, zero coupon U.S. Treasury
securities (which are Treasury notes and bonds that have been stripped of their
unmatured interest coupons), the coupons themselves and receipts or
certificates representing interests in such stripped debt obligations. 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 market
prices of securities that pay interest periodically and are likely to respond
to a greater degree to changes in interest rates than interest bearing
securities having similar maturities and credit qualities. The Fund's
investments in zero coupon securities or other stripped securities 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.
 
                                       12
<PAGE>
 
   YIELD, MARKET VALUE AND RISK CONSIDERATIONS OF MORTGAGE-BACKED SECURITIES
 
  The Fund may invest in certain Mortgage-Backed Securities, such as interest-
only and principal-only SMBS, that are extremely sensitive to changes in
prepayments and interest rates. Even though such securities have been issued or
guaranteed by an agency or instrumentality of the U.S. Government, under
certain interest rate or prepayment rate scenarios, the Fund may fail to fully
recover its investment in such securities.
 
  The investment characteristics of Mortgage-Backed Securities differ from
those of traditional fixed income securities. The major differences typically
include more frequent interest and principal payments, usually monthly, and the
possibility that unscheduled prepayments of principal may be made at any time.
Prepayment rates are influenced by changes in current interest rates and a
variety of economic, geographic, social and other factors and cannot be
predicted with certainty. Adjustable rate mortgage loans may be subject to a
greater prepayment rate in a declining interest rate environment. The yields to
maturity of the Mortgage-Backed Securities in which the Fund may invest will be
affected by the actual rate of payment (including prepayments) of principal of
the underlying mortgage loans. The mortgage loans underlying such securities
generally may be prepaid at any time without penalty. In a fluctuating interest
rate environment, a predominant factor affecting the prepayment rate on a pool
of mortgage loans is the difference between the interest rates on the mortgage
loans and prevailing mortgage loan interest rates (giving consideration to the
cost of any refinancing). In general, if interest rates on new mortgage loans
fall sufficiently below the interest rates on existing fixed rate mortgage
loans underlying mortgage pass-through securities, the rate of prepayment would
be expected to increase. Conversely, if mortgage loan interest rates rise above
the interest rates on the fixed rate mortgage loans underlying the mortgage
pass-through securities, the rate of prepayment may be expected to decrease.
 
  The rate of principal prepayments with respect to adjustable rate mortgages
has fluctuated in recent years. As is the case with fixed rate mortgage loans,
adjustable rate mortgages may be subject to a greater rate of principal
prepayments in a declining interest rate environment. For example, if
prevailing interest rates fall significantly, mortgages could be subject to
higher prepayment rates than if prevailing interest rates remain constant
because the availability of fixed rate mortgage loans at competitive interest
rates may encourage mortgagors to refinance their mortgages to "lock-in" a
lower fixed interest rate. Conversely, if prevailing interest rates rise
significantly, adjustable rate mortgages may prepay at lower rates than if
prevailing rates remain at or below those in effect at the time such mortgages
were originated due, for example, to the unavailability of lower rate
alternatives. There can be no certainty as to the rate of prepayments on the
mortgages in either stable or changing interest rate environments. In addition,
there can be no certainty as to whether increases in the principal balances of
adjustable rate mortgages due to the addition of deferred interest may result
in a default rate higher than that on mortgages that do not provide for
negative amortization. Other factors affecting prepayment of mortgages include
changes in mortgagors' housing needs, job transfers, unemployment, mortgagors'
net equity in the mortgage properties and servicing decisions.
 
  The Fund's reinvestment of principal payments and prepayments received on a
mortgage pass-through security may be made at rates higher or lower than the
rate payable on such security, thus affecting the return realized by the Fund.
In addition, the receipt of interest payments monthly rather than semi-annually
by the Fund has a compounding effect that may increase the yield to the Fund
relative to debt obligations that pay interest semi-annually. Due to these
factors, Mortgage-Backed Securities may also be less effective than U.S.
Treasury securities of similar maturity at maintaining yields during periods
 
                                       13
<PAGE>
 
of changing interest rates. Prepayments may have a disproportionate effect on
certain Mortgage-Backed Securities such as SMBS and certain other multiple
class pass-through securities. The Fund may purchase Mortgage-Backed Securities
at a premium or at a discount.
 
  RISKS ASSOCIATED WITH DERIVATIVE MORTGAGE-BACKED SECURITIES. Derivative
Mortgage-Backed Securities are subject to different combinations of interest
rate and/or prepayment risks. 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. The Investment Adviser may use
derivative Mortgage-Backed Securities and other derivative securities
consistent with the Fund's investment objective for a variety of purposes
including adjusting the average duration or interest rate sensitivity of the
Fund's portfolio or attempting to enhance the Fund's total return. The
Investment Adviser manages the risks and benefits of derivative Mortgage-Backed
Securities and other derivative securities by prudent analysis, selection and
monitoring of such securities included in the Fund's portfolio.
 
  The risk of faster than anticipated prepayments generally adversely affects
interest-only securities (IOs), super floaters and premium priced Mortgage-
Backed Securities. The risk of slower than anticipated prepayments generally
adversely affects principal-only securities (POs), floating rate securities
subject to interest rate caps, support tranches and discount priced Mortgage-
Backed Securities.
 
  RISKS ASSOCIATED WITH OTHER DERIVATIVE FLOATING RATE SECURITIES. Other types
of floating rate derivative securities present more complex types of interest
rate risks. For example, range floaters are subject to the risk that the coupon
will be reduced to 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.
 
                        OTHER INVESTMENTS AND PRACTICES
 
  INVERSE FLOATING RATE SECURITIES. The Fund may invest in leveraged inverse
floating rate debt instruments ("inverse floaters"). The interest rate on an
inverse floater resets in the opposite direction from the market rate of
interest to which the inverse floater is indexed. An inverse floater may be
considered to be leveraged to the extent that its interest rate varies by a
magnitude that exceeds the magnitude of the change in the index rate of
interest. The higher degree of leverage inherent in inverse floaters is
associated with the greater volatility in their market values. Accordingly, the
duration of an inverse floater may exceed its stated final maturity. Certain
inverse floaters may be deemed to be illiquid securities for purposes of the
Fund's 15% limitation on investments in such securities.
 
  INTEREST RATE SWAPS, MORTGAGE SWAPS, CAPS, FLOORS AND COLLARS. The Fund may
enter into interest rate swaps and mortgage swaps for hedging purposes and to
increase total return. The Fund may also enter into other types of interest
rate swap arrangements such as caps, floors and collars. Interest rate swaps
involve the exchange by the Fund with another party of their respective
commitments to pay or receive interest, e.g., an exchange of floating rate
payments for fixed rate payments. Mortgage swaps are similar to interest rate
swaps in that they represent commitments to pay and receive interest. The
notional principal amount, however, is tied to a reference pool or pools of
mortgages. The purchase of an interest rate cap entitles the purchaser, to the
extent that a specified index exceeds a predetermined interest rate, to receive
payment of interest on a notional principal amount from the party selling such
interest rate cap. The purchase of an interest rate floor entitles the
purchaser, to the extent that a specified index falls below a predetermined
interest rate, to receive payment of interest on a notional principal
 
                                       14
<PAGE>
 
amount from the party selling such interest rate floor. An interest rate collar
is the combination of a cap and a floor that preserves a certain return within
a predetermined range of interest rates. Since interest rate swaps, mortgage
swaps, caps, floors and collars are individually negotiated, the Fund expects
to achieve an acceptable degree of correlation between its portfolio
investments and its swap, cap, floor and collar positions entered into for
hedging purposes.
 
  The Fund will enter into interest rate swaps and mortgage swaps only on a net
basis, which means that the two payment streams are netted out, with the Fund
receiving or paying, as the case may be, only the net amount of the two
payments. Interest rate swaps and mortgage swaps do not involve the delivery of
securities, other underlying assets or principal. Accordingly, the risk of loss
with respect to interest rate swaps and mortgage swaps is limited to the net
amount of payments that the Fund is contractually obligated to make. If the
other party to an interest rate swap or mortgage swap defaults, the Fund's risk
of loss consists of the net amount of payments that the Fund is contractually
entitled to receive, if any. To the extent the net amount of an interest rate
swap or mortgage swap is held in a segregated account, consisting of cash and
liquid, high grade debt securities, the Fund and the Investment Adviser believe
that swaps do not constitute senior securities under the Investment Company Act
of 1940, as amended (the "Act") and, accordingly, will not treat them as being
subject to the Fund's borrowing restriction.
 
  The Fund will not enter into any interest rate swap, mortgage swap, or
interest rate cap, floor or collar transactions unless the unsecured commercial
paper, senior debt or claims paying ability of the other party is rated either
AA or A-1 or better by Standard & Poor's Ratings Group ("S&P") or Aa or P-1 or
better by 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 use of interest rate and mortgage swaps as well as interest rate caps,
floors and collars, 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 market values and interest rates, the investment performance of
the Fund would be less favorable than it would have been if these investment
techniques were not used. The staff of the SEC considers interest rate swaps
and mortgage swaps, as well as interest rate floors and collars, to be illiquid
securities for purposes of the Fund's 15% limitation on illiquid investments.
 
  LENDING OF PORTFOLIO SECURITIES. The 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 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 the Fund. See "Investment Restrictions" in the
Additional Statement. The 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.
 
  WHEN-ISSUED AND FORWARD COMMITMENT SECURITIES. The Fund may purchase
securities on a when-issued basis. When-issued transactions arise when
securities are purchased by the 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. The Fund
may also purchase securities on a forward commitment basis. In a forward
commitment transaction, the Fund
 
                                       15
<PAGE>
 
contracts to purchase securities for a fixed price at a future date beyond
customary settlement time. The Fund is required to hold and maintain in a
segregated account until the settlement date cash or liquid, high grade debt
obligations in an amount sufficient to meet the purchase price. Alternatively,
the Fund may enter into offsetting contracts for the forward sale of other
securities that it owns. 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. Although the Fund would
generally purchase securities on a when-issued or forward commitment basis with
the intention of actually acquiring securities for its portfolio, the Fund may
dispose of a when-issued security or forward commitment prior to settlement if
the Investment Adviser deems it appropriate to do so.
 
  MORTGAGE DOLLAR ROLLS. The 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 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 (often referred to as the
"drop") or fee income plus the interest earned on the cash proceeds of the
securities sold until the settlement date of 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 compared with what such performance would
have been without the use of mortgage dollar rolls. All cash proceeds will be
invested in instruments that are permissible investments for the Fund. The Fund
will hold and maintain in a segregated account until the settlement date cash
or liquid, high grade debt securities in an amount equal to the forward
purchase price.
 
  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.
 
  Mortgage dollar rolls involve certain risks including the following: if the
broker-dealer to whom the Fund sells the security becomes insolvent, the Fund's
right to purchase or repurchase the mortgage-related securities subject to the
mortgage dollar roll may be restricted and the instrument which the Fund is
required to repurchase may be worth less than an instrument which the Fund
originally held. Successful use of mortgage dollar rolls will depend upon the
Investment Adviser's ability to manage its interest rate and mortgage
prepayments exposure. For these reasons, there is no assurance that mortgage
dollar rolls can be successfully employed.
 
  REPURCHASE AGREEMENTS. The 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. In a repurchase agreement, the Fund
purchases a debt security from a seller which undertakes to repurchase the
security at a specified resale price on an agreed future date (ordinarily a
week or less). The resale price generally exceeds the purchase price by an
amount which reflects an agreed-upon market interest rate for the term of the
repurchase agreement. The primary risk is that, if the seller defaults, the
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. Repurchase
agreements maturing in more than seven days are considered by the Fund to be
illiquid. In
 
                                       16
<PAGE>
 
addition, the Fund, together with other registered investment companies having
advisory agreements with the Investment Adviser or any of 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.
 
  ILLIQUID SECURITIES. The Fund will not invest more than 15% of its net assets
in securities which are illiquid, including securities that are not readily
marketable, repurchase agreements maturing in more than seven days, interest
rate and mortgage swaps, interest rate caps, floors and collars, certain SMBS
and securities that are restricted as to resale. However, a restricted security
is not considered to be illiquid if the Trustees of the Trust determine, based
upon the Investment Adviser's continuing review of the trading markets for the
specific restricted security, under guidelines adopted by the Trustees of the
Trust and subject to the Trustees' oversight and ultimate responsibility, that
such restricted security eligible for resale under Rule 144A under the
Securities Act of 1933 is liquid. In addition, a repurchase agreement which by
its terms can be liquidated before its nominal fixed term on seven days or less
notice is regarded as a liquid instrument. Subject to the 15% limitation on
illiquid securities investments, the Fund may acquire U.S. Government
securities in a private placement.
 
  Since it is not possible to predict with assurance exactly how this market
for restricted securities sold and offered under Rule 144A will develop, the
Board of Trustees will carefully monitor the Fund's investments in these
securities, focusing on such important factors, among others, as valuation,
credit quality, liquidity and availability of information. This investment
practice could have the effect of increasing the level of illiquidity in the
Fund to the extent that qualified institutional buyers become for a time
uninterested in purchasing these restricted securities.
 
  OTHER INVESTMENT COMPANIES. The Fund reserves the right to invest up to 10%
of its total assets, calculated at the time of purchase, in the securities of
other investment companies, including business development companies and small
business investment companies. The Fund may not invest more than 5% of its
total assets in the securities of any one investment company or acquire more
than 3% of the voting securities of any other investment company. Pursuant to
an exemptive order obtained from the SEC, other investment companies in which
the Fund may invest include money market funds for which the Investment Adviser
or any of its affiliates serves as investment adviser. The Fund will indirectly
bear its proportionate share of any management fees and other expenses paid by
investment companies in which it invests in addition to the advisory fees paid
by the Fund. However, to the extent that the Fund invests in a money market
fund for which the Investment Adviser or any of its affiliates acts as adviser,
the advisory fees payable by the Fund to the Investment Adviser will be reduced
by an amount equal to the Fund's proportionate share of the advisory fees paid
by such money market fund to the Investment Adviser or any of its affiliates.
 
  INSTRUMENT MATURITY. The Mortgage-Backed Securities in which the Fund invests
will have an estimated average life, as determined by the Investment Adviser,
of six years or less. Average life estimates are based upon anticipated
prepayment patterns which, in turn, are based upon past prepayment patterns,
prevailing interest rates and other factors. Due to actual prepayment
experience, however, the remaining estimated average life of an investment
after purchase by the Fund may increase to more than six years or may decrease
at a rate faster than anticipated. The Fund's other securities generally will
have remaining maturities of 6 years or less and repurchase agreements will
have remaining maturities of less than one year.
 
                                       17
<PAGE>
 
  The Fund may purchase securities with variable or floating interest rates. In
calculating average portfolio duration or maturity, such securities will
generally be treated as having a maturity equal to the time remaining until
their interest rate is next reset, unless the Investment Adviser believes some
other treatment to be more appropriate, for example, because of the market
price impact of interest rate caps, floors and collars. In addition, the Fund
also may purchase securities that have demand or put features. In calculating
average portfolio duration or maturity, these securities generally will be
treated as having a maturity equal to the period remaining until the Fund can
obtain the principal amount through exercise of such feature.
 
  OTHER INFORMATION. The Investment Adviser seeks to enhance the Fund's income
by taking advantage of yield disparities or other factors (such as anticipated
changes in relative value which have not yet occurred) that occur or are
expected to occur in the securities markets. The Fund may dispose of any
security prior to its maturity if such disposition and reinvestment of the
proceeds are expected to enhance income consistent with the Investment
Adviser's judgment as to a desirable maturity structure or if such disposition
is believed to be advisable due to other circumstances or considerations.
 
                            INVESTMENT RESTRICTIONS
 
  The Fund is subject to certain investment restrictions which, as described in
more detail in the Additional Statement, are fundamental policies that cannot
be changed without the approval of a majority of the outstanding shares of the
Fund. Among other restrictions, as a diversified Fund, the Fund may not, with
respect to 75% of its total assets, purchase the securities of any one issuer
(except U.S. Government securities) if more than 5% of the value of the Fund's
assets would be invested in such issuer. The Fund has the authority to borrow
money but only (a) as a temporary measure, and then only in amounts not
exceeding 5% of the value of the Fund's net assets (excluding any amount
borrowed) or (b) from banks, provided that immediately after any such borrowing
all borrowings of the Fund do not exceed one-third of the Fund's net assets
(excluding any amount borrowed). The Fund does not intend to borrow for
investment leverage purposes but solely for extraordinary or emergency purposes
or to facilitate management of the Fund by enabling it to meet redemption
requests when the liquidation of portfolio instruments is deemed to be
disadvantageous or not possible. The Fund may not purchase securities while
such borrowings exceed 5% of the value of the Fund's total assets.
 
                               PORTFOLIO TURNOVER
 
  It is anticipated that the portfolio turnover rate of the Fund will vary from
year to year. The portfolio turnover rate is computed by dividing the lesser of
the 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 the 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
the Fund consistent with the Fund's investment objective and portfolio
management policies. A higher rate of portfolio turnover results in increased
transaction costs to the Fund. The portfolio turnover rate includes the effect
of entering into mortgage dollar rolls.
 
                                       18
<PAGE>
 
                                   MANAGEMENT
 
TRUSTEES AND OFFICERS
 
  The Trust's Board of Trustees is 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 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 ADVISER
 
  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,
acts as the investment adviser of the Fund. Goldman Sachs Funds Management,
L.P. was registered as an investment adviser in 1990. As of January 31, 1995,
the Investment Adviser, together with its affiliates, acted as investment
adviser, administrator or distributor for approximately $48.7 billion in
assets.
 
  Under its Investment Advisory Agreement with the Fund, Goldman Sachs Funds
Management, L.P., subject to the general supervision of the Board of Trustees,
manages the Fund's portfolio and provides for the administration of all of the
Fund's other affairs. It is the responsibility of the Investment Adviser to
make investment decisions for the Fund and to place purchase and sale orders
for the Fund's portfolio transactions. 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. Goldman Sachs has agreed to permit the Fund to
use the name "Goldman Sachs" or a derivative thereof as part of the Fund's name
for as long as the Investment Advisory Agreement is in effect.
 
  The Fund's portfolio managers are Jonathan A. Beinner and Theodore T. Sotir.
Mr. Beinner specializes in investing in a particular type of security the Fund
may hold. Mr. Sotir helps with overall portfolio strategy and is a member of
the Investment Adviser's risk control team. Mr. Beinner joined the Investment
Adviser in 1990 and is currently a Vice President, after working in the trading
and arbitrage group of Franklin Savings Association. Mr. Sotir joined the
Investment Adviser in 1993 and is currently a Vice President, after working as
a portfolio manager at Fidelity Management Trust Company. Prior to joining
Fidelity, Mr. Sotir worked for Goldman Sachs in the mortgage securities
department for six years.
 
  As compensation for the services rendered to the Fund by the Investment
Adviser pursuant to the Investment Advisory Agreement, and the assumption by
the Investment Adviser of the expenses related thereto, the Fund pays the
Investment Adviser a fee, computed daily and payable monthly, at an annual rate
equal to 0.50% of the Fund's average daily net assets. For the fiscal year
ended October 31, 1994, the Fund paid an advisory fee to the Investment Adviser
at the annual rate of 0.40% of the Fund's average daily net assets.
 
  The Investment Adviser has voluntarily agreed not to impose a portion of its
advisory fee (equal to 0.10% of the Fund's average daily net assets) and to
reduce or otherwise limit certain expenses of the Fund (excluding advisory
fees, payments to Service Organizations (as defined below), taxes, interest and
brokerage and litigation, indemnification and other extraordinary expenses) to
the extent such expenses exceed 0.05% annually of the Fund's average net
assets. Such reductions or limits, if any, are calculated monthly on a
cumulative basis and may be discontinued or modified by the Investment Adviser
at its
 
                                       19
<PAGE>
 
discretion at any time. The Investment Adviser has also agreed to reduce its
fees payable (to the extent of such fees) by the amount the Fund's expenses
would, absent the fee reduction, exceed the applicable expense limitations
imposed by state securities administrators. See "Management--Expenses" in the
Additional Statement.
 
  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 the Fund or limit its 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 Fund and/or which engage in
and compete for transactions in the same types of securities and instruments as
the Fund. 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 Fund and it is not anticipated that the
Investment Adviser will have access to proprietary information for the purpose
of managing the Fund. The results of the Fund's investment activities,
therefore, may differ from those of Goldman Sachs and its affiliates and it is
possible that the 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. From time to time, the 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 "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, serves as the exclusive
distributor of the Fund's shares. Goldman Sachs, 4900 Sears Tower, Chicago,
Illinois, also serves as the Fund's transfer agent (the "Transfer Agent").
Shareholders of record with inquiries regarding the Fund should contact Goldman
Sachs (as Transfer Agent) at the address or the telephone number set forth on
the cover page of this Prospectus.
 
                                   DIVIDENDS
 
  The Fund intends that all or substantially all of its net investment income
will be declared as a dividend on each day to shareholders of record as of 3:00
p.m. Chicago time on that day. Over the course of the fiscal year, dividends
accrued and paid will constitute all or substantially all of the Fund's net
investment income. From time to time a portion of such dividends may constitute
a return of capital. The Fund also intends that all net realized long-term and
short-term 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.
 
  The 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 the Fund's net asset value as of 3:00 p.m. Chicago
time. On days on which net asset value is not calculated, such determination is
made as of 3:00 p.m. Chicago time.
 
                                       20
<PAGE>
 
  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 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 the Fund a portion of the
net asset value per share may be represented by undistributed income of the
Fund or unrealized appreciation of the Fund's portfolio securities. Therefore,
subsequent distributions (or portions thereof) on such shares 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.
 
                                NET ASSET VALUE
 
  The net asset value per share is calculated by the Fund's custodian as of the
close of regular trading on the New York Stock Exchange (normally 3:00 p.m.
Chicago time, 4:00 p.m. New York time), immediately after determination of the
income to be declared as a dividend on each Business Day (as such term is
defined under "Additional Information"). Net asset value per share of each
class is calculated by determining the net assets attributable to each class
and dividing by the number of outstanding shares of that class.
 
  Investments in U.S. Government Securities, including Mortgage-Backed
Securities, and other debt obligations are valued at fair value, based on yield
equivalents, a pricing matrix or other sources, under valuation procedures
established by the Trust's Board of Trustees. Other portfolio securities for
which accurate market quotations are readily available are valued on the basis
of quotations furnished by pricing services or provided by dealers in such
securities. Portfolio securities for which accurate market quotations are not
readily available are valued in accordance with the Trust's valuation
procedures. 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 the Fund may publish yield and average annual total return
in advertisements and communications to shareholders or prospective investors.
 
  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 net
asset value 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.
 
                                       21
<PAGE>
 
  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 (i.e., net asset value) 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. The Fund may also from time
to time advertise total return on an 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, the Fund may from time to time advertise
its performance relative to certain performance rankings and indices.
 
  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 ending net asset value for the
period for which the distribution rates are being calculated.
 
  The investment results of the 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 Fund may, in its discretion, from time to time make a
list of the Fund's holdings available to investors upon request.
 
  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 of the Fund for the same
period will differ. Due to the fees payable under the Service Plan and the
Administration Plan, the investment performance, for any period, of the
Institutional Shares will always be higher than that of the Service Shares and
the Administration Shares and the investment performance of the Administration
Shares will always be higher than that of the Service Shares. See "Shares of
the Trust" below.
 
                              SHARES OF THE TRUST
 
  The Fund is a series of Goldman Sachs Trust, which was organized under the
laws of The Commonwealth of Massachusetts on September 24, 1987 as a
Massachusetts business trust under an Agreement and Declaration of Trust, as
amended (the "Trust Agreement"). Under the Trust Agreement, the Trustees are
authorized to issue an unlimited number of shares of beneficial interest, $.001
par value per share. The Trustees of the Trust are responsible for the overall
management and supervision of its affairs. The Trustees of the Trust have
authority under the Trust Agreement to create and classify shares of beneficial
interest in separate series, without further action by shareholders. As of the
date of this Prospectus, the Trustees have authorized shares of the Fund and
ten other series. 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. Pursuant thereto, the Trustees have authorized the
issuance of three classes of shares of the Fund. These classes are:
Institutional Shares, Administration Shares and Service Shares. As of October
31, 1994, no Service Shares of the Fund were outstanding.
 
  Each Institutional Share, Administration Share and Service Share of the Fund
represents an equal proportionate interest in the assets belonging to the Fund.
All Fund expenses are based on a percentage of the Fund's aggregate average net
assets, except that the respective administration and service fees relating to
a particular class will be borne exclusively by that class. It is contemplated
that most Administration Shares and Service Shares will be held in accounts of
which the record owner is a bank or other institution acting, directly or
through an agent, as nominee for its customers who are the beneficial
 
                                       22
<PAGE>
 
owners of the shares or another organization designated by such bank or
institution. Administration Shares and Service Shares will each be marketed
only to such institutional investors, at net asset value with no sales load.
Institutional Shares may be purchased for accounts in the name of an investor
or institution that is not compensated by the Fund for services provided to the
institution's customers. Administration Shares may be purchased for accounts
held in the name of an institution that provides certain account administration
services to its customers, including maintenance of account records and
processing orders to purchase, redeem or exchange Administration Shares.
Administration Shares bear the cost of account administration fees at the
annual rate of up to 0.25% of the average daily net assets of such
Administration Shares. Service Shares may be purchased for accounts held in the
name of an institution that provides certain account administration and
shareholder liaison services to its customers, including maintenance of account
records and processing orders to purchase, redeem or exchange Service Shares,
responding to customer inquiries and assisting customers with investment
procedures. Service Shares bear the cost of service fees at the annual rate of
up to 0.50% of the average daily net assets of such Service Shares.
(Institutions that provide services to holders of Administration or Service
Shares are referred to in this Prospectus as "Service Organizations").
 
  It is possible that an institution or its affiliate may offer different
classes of shares (i.e., Institutional, Administration and Service Shares) to
its customers and thus receive different compensation with respect to different
classes of shares of the Fund. Administration Shares and Service Shares may
each have certain exclusive voting rights on matters relating to their
respective plans. Shares of each class may be exchanged only for shares of the
same class in another fund and certain money market funds sponsored by Goldman
Sachs. The Fund may amend such policy in the future. Dividends paid by the
Fund, if any, with respect to each class of shares will be calculated in the
same manner, at the same time on the same day and will be in the same amount,
except for differences caused by the fact that the respective fees under
Administration and Service Plans relating to a particular class will be borne
exclusively by that class. Similarly, the net asset value per share will vary
depending on the class of shares purchased.
 
  Certain aspects of the shares may be altered, after advance notice to
shareholders, if it is deemed necessary in order to satisfy certain tax
regulatory requirements.
 
  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 Fund available for distribution to such shareholders. All shares entitle
their holders to one vote per share, are freely transferable and have no
preemptive, subscription or conversion rights.
 
  Under Massachusetts law, there is a remote possibility that shareholders of a
business trust could, under certain circumstances, be held personally liable as
partners for the obligations of such trust. The Trust Agreement contains
provisions intended to limit such liability and to provide indemnification out
of Trust property of any shareholder charged or held personally liable for
obligations or liabilities of the Trust solely by reason of being or having
been a shareholder of the Trust and not because of such shareholder's acts or
omissions or for some other reason. Thus, the risk of a shareholder incurring
financial loss on account of shareholder liability is limited to circumstances
in which the Trust itself would be unable to meet its obligations.
 
  Unless otherwise required by the Act, ordinarily it will not be necessary for
the Trust to hold annual meetings of shareholders. As a result, shareholders
may not consider each year the election of Trustees or the appointment of
independent accountants. Shareholders may remove a Trustee by the affirmative
 
                                       23
<PAGE>
 
vote of at least two-thirds of the Trust's outstanding shares and the Trustees
must promptly call a meeting for such purpose when requested to do so in
writing by the recordholders of not less than 10% of the outstanding shares of
the Trust. Shareholders may, under certain circumstances, communicate with
other shareholders in connection with requesting a special meeting of
shareholders. The Board of Trustees, however, 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 share
certificates. 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. Shares and any dividends and
distributions paid by the Fund are reflected in account statements from the
Transfer Agent.
 
                                    TAXATION
 
FEDERAL TAXES
 
  The Fund is treated as a separate entity for tax purposes. The Fund has
qualified and elected to be treated as a regulated investment company under
Subchapter M of the Code, and it intends to continue to qualify for such
treatment. To qualify for treatment as a regulated investment company, the 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, the 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 the Fund from net investment income, the excess of net
short-term capital gain over net long-term capital loss and original issue
discount or certain market discount income will be taxable to shareholders as
ordinary income. Dividends paid by the Fund from the excess of net long-term
capital gain over net short-term capital loss will be taxable as long-term
capital gains regardless of how long the shareholders have held their shares.
These tax consequences will apply regardless of whether distributions are
received in cash or reinvested in shares. Certain distributions paid by the
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 Fund 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 on which a shareholder
may recognize a gain or loss.
 
  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 the Fund with their correct taxpayer
identification number and certain certifications 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 Fund.
 
                                       24
<PAGE>
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local or
foreign taxes on payments received from the Fund. A state income (and possibly
local income and/or intangible property) tax exemption is generally available
to the extent the Fund's distributions are derived from interest on (or, in the
case of intangibles 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.
 
  Shareholders should consult their own tax advisors regarding specific
questions as to United States federal, state, local and foreign tax
consequences of investing in the Fund in their particular circumstances. See
the Additional Statement for a further discussion of certain tax consequences
of investing in shares of the Fund.
 
                             ADDITIONAL INFORMATION
 
  The term "majority of the outstanding shares" of the Fund means the vote of
the lesser of (i) 67% or more of the shares present at a meeting, if the
holders of more than 50% of the outstanding shares of the Fund are present or
represented by proxy, or (ii) more than 50% of the outstanding shares of the
Fund.
 
  As used in this Prospectus, the term "Business Day" refers to those days when
the Investment Adviser, The Northern Trust Company, State Street Bank and Trust
Company and the Federal Reserve Bank of New York are open for business, which
is Monday through Friday except for holidays. Such holidays currently are: New
Year's Day (observed), Martin Luther King Day, Presidents' Day (observed), Good
Friday, Memorial Day (observed), Independence Day, Labor Day, Columbus Day,
Thanksgiving Day and Christmas. On those days when one or more of such
organizations close early as a result of such day being a partial holiday or
otherwise, the right is reserved to advance the time on that day by which
purchase and redemption requests must be received.
 
                                       25
<PAGE>
 
                            REPORTS TO SHAREHOLDERS
 
  Institutional Shareholders will receive an annual report containing audited
financial statements and a semi-annual report. Each Institutional Shareholder
will also be provided with a printed confirmation for each transaction in the
shareholder's account and an individual monthly statement. A year-to-date
statement for any account will be provided upon request made to Goldman Sachs.
 
SUB-ACCOUNTING SERVICE
 
  The Fund has designed special procedures to assist banks and other
institutional investors desiring to establish multiple accounts (master
accounts and their sub-accounts). Sub-accounts may be established with
registration by name and/or number. Institutions will not normally be charged
for this service unless otherwise agreed upon. Upon request, master accounts
will be provided with a monthly summary report which sets forth in order by
account number (or name) the share balance at month end and the income, if any,
together with the total share balance and income, if any, for the master
account.
 
                        PURCHASE OF INSTITUTIONAL SHARES
 
  Institutional Shares of the Fund may be purchased through Goldman Sachs at
the net asset value per share next determined after receipt of an order without
the imposition of a sales load. If, by 3:00 p.m. Chicago time (4:00 p.m. New
York time), an order, a check or a Federal Reserve draft is received by Goldman
Sachs, the price per share will be the net asset value per share computed on
the day the purchase order or such form of payment is received. See "Net Asset
Value."
 
PURCHASE PROCEDURES
 
  Purchases of Institutional Shares 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 check (except that a check drawn on a foreign bank will not be
accepted) or Federal Reserve draft made payable to "Goldman Sachs Trust--GS
Short-Term Government Agency Fund" and should be directed to Goldman Sachs
Trust--GS Short-Term Government Agency Fund, c/o GSAM Shareholder Services,
4900 Sears Tower, Chicago, Illinois 60606. 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."
 
  In order to make an initial investment in the Fund, an investor must
establish an account with the 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 establish such an account. Subsequent
purchases of Institutional Shares may be made in the manner set forth in the
preceding paragraph.
 
  The minimum initial investment is $50,000 in Institutional Shares of the 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 relevant class of any portfolio of Goldman Sachs Money Market Trust.
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. The Fund reserves the
 
                                       26
<PAGE>
 
right to redeem the Institutional Shares of any Institutional Shareholder whose
account balance is less than $100 as a result of earlier redemptions. Such
redemptions will not be implemented if the value of an Institutional
Shareholder'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 Shareholders whose Institutional Shares are being
redeemed to allow them to purchase sufficient additional Institutional Shares
of the Fund to avoid such redemption.
 
OTHER PURCHASE INFORMATION
 
  PURCHASE BY FEDERAL FUNDS WIRE OR ACH TRANSFER. If a purchase order is
received by Goldman Sachs by 3:00 p.m. Chicago time, the purchased shares will
be issued and dividends will begin on such shares on the next Business Day,
provided that a Federal Funds wire or an ACH transfer is received by Northern
on such day.
 
  PURCHASE BY CHECK OR FEDERAL RESERVE DRAFT. If a purchase check or Federal
Reserve draft is received by Goldman Sachs by 3:00 p.m. Chicago time, the
purchased shares will be issued and dividends will begin on such shares on the
next Business Day after the check or Federal Reserve draft is received by
Goldman Sachs.
 
  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 Fund 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). The Fund or Goldman
Sachs may reject or restrict purchases or exchanges of Institutional Shares by
a particular purchaser or group, for example, when a pattern of frequent
purchases and sales or exchanges of Institutional Shares of the Fund is
evident, or if the purchase, sale or exchange orders are, or a subsequent
abrupt redemption might be, of a size that would disrupt management of the
Fund.
 
                               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 relevant class of any portfolio of
Goldman Sachs Money Market Trust at the net asset value next determined either
by writing to Goldman Sachs, Attention: Goldman Sachs Trust--GS Short-Term
Government Agency Fund, 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 3:00 p.m. Chicago
time). A shareholder should obtain and read the prospectus relating to any
other fund and its shares or units 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."
 
 
                                       27
<PAGE>
 
  In times of drastic economic or market changes the telephone exchange
privilege may be difficult to implement. 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. 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 relevant class of any portfolio of
Goldman Sachs Money Market Trust received in the exchange. Shareholders should
consult their own tax advisers concerning the tax consequences of an exchange.
 
  All exchanges which represent 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 such fund. Exchanges are available only in states
where exchanges may legally be made. The exchange privilege may be 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 Fund will redeem its Institutional Shares upon request of an
Institutional Shareholder on any Business Day at the net asset value next
determined after the receipt by the Transfer Agent of such request in proper
form. See "Net Asset Value." If Institutional Shares to be redeemed were
recently purchased by check, the 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 writing to or calling the
Transfer Agent at the address or telephone number set forth on the cover page
of this Prospectus. An Institutional Shareholder 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 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. 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 Fund, 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 Institutional
Shareholder, 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
 
                                       28
<PAGE>
 
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. If
Goldman Sachs receives a redemption request by 3:00 p.m. Chicago time, the
Institutional Shares to be redeemed earn dividends with respect to the day the
request is received.
 
  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
Institutional Shareholder's Account Information Form. Redemption proceeds will
normally be wired on the next Business Day in Federal Funds (for a total one-
day delay), but may be paid up to seven (7) 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. 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 Fund, the Trust nor Goldman Sachs
assumes any further responsibility for the performance of intermediaries or the
Institutional Shareholder's bank in the transfer process. If a problem with
such performance arises, the Institutional 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 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.
 
  Except with respect to Institutional Shareholders whose account balances are
less than $100, Institutional Shares are not redeemable at the option of the
Fund unless the Board of Trustees of the Trust determines in its sole
discretion that failure to so redeem may have material adverse consequences to
the shareholders of the Fund. The Fund, however, assumes no responsibility to
compel redemptions.
 
                               ----------------
 
                                       29
<PAGE>
 
                                   APPENDIX A
 
                    GUIDELINES FOR CERTIFICATION OF TAXPAYER
               IDENTIFICATION NUMBER ON ACCOUNT INFORMATION FORM
 
  You are required by law to provide the 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 the 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. Exempt recipients include:
corporations, tax-exempt pension plans and IRA's, 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 Fund in order to avoid 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>
 
THIS ACCOUNT INFORMATION FORM SHOULD BE FORWARDED PROMPTLY TO GOLDMAN, SACHS &  
                                      CO.
                 NO REDEMPTION CAN BE MADE PRIOR TO ITS RECEIPT
                   GOLDMAN, SACHS & CO.--INSTITUTIONAL FUNDS
                            ACCOUNT INFORMATION FORM
                                                   -----------------------------
SEND TO: GOLDMAN, SACHS & CO. INSTITUTIONAL FUNDS   MASTER NO.  ________________
     4900 SEARS TOWER                                            FUND USE ONLY
     CHICAGO, ILLINOIS 60606                       -----------------------------
     1-800-621-2550                                DATE: _______________________
                                                 
                              INITIAL INVESTMENT:
 
( ) GOLDMAN SACHS MONEY MARKET TRUST  ( ) GS--ADJUSTABLE RATE GOVERNMENT AGENCY
    Fill in Portfolio(s):                     FUND
( ) OTHER FUND (Please write name of  ( ) GS--CORE FIXED INCOME FUND
    Fund in the space provided        ( ) GS--SHORT DURATION TAX-FREE FUND
    below):                           ( ) GS--SHORT-TERM GOVERNMENT AGENCY FUND
                                      ( ) GS--GOVERNMENT AGENCY PORTFOLIO (FOR
    ________________________________          FINANCIAL INSTITUTIONS)
 
________________________________________________________________________________
A. ACCOUNT RECORD                             
                                              
   _________________________________          __________________________________
            NAME OF ACCOUNT                            TELEPHONE NUMBER
                                                      
   _________________________________          
          STREET OR P.O. BOX                  U.S. CITIZEN OR RESIDENT? 
                                                   YES [_] NO [_]
   _________________________________          IF NO IS CHECKED, FILL IN
   CITY         STATE          ZIP            COUNTRY OF TAX RESIDENCE:

   _________________________________          _____________________________
               ATTENTION
________________________________________________________________________________
 
B. DIVIDENDS AND DISTRIBUTIONS--CHECK APPROPRIATE BOX (SEE "DIVIDENDS")
   1. DIVIDENDS (INCLUDING NET SHORT TERM      [_] CASH  [_] UNITS/SHARES
      CAPITAL GAINS)--                         
   2. NET LONG-TERM CAPITAL GAINS              [_] CASH  [_] UNITS/SHARES
      DISTRIBUTIONS--                          
   3. DIVIDENDS AND CAPITAL GAINS REINVESTED             [_] UNITS/SHARES
      IN ANOTHER GOLDMAN SACHS PORTFOLIO ACCOUNT:
      (SEE PROSPECTUS REGARDING LIMITATIONS ON THIS PRIVILEGE.)
 
   FUND NAME_________________________ ACCOUNT NUMBER__________________________
    (IF NO BOX IS CHECKED, DIVIDENDS AND CAPITAL GAINS DISTRIBUTIONS WILL BE
                                  REINVESTED.)
________________________________________________________________________________
C. SOCIAL SECURITY NUMBER OR OTHER TAXPAYER IDENTIFICATION NUMBER CERTIFICATION
 TAXPAYER IDENTIFICATION NUMBER: _____________________________________________
 UNDER PENALTIES OF PERJURY, I CERTIFY THAT (1) THE NUMBER SHOWN ON THIS FORM
 IS MY CORRECT TAXPAYER IDENTIFICATION NUMBER (OR I AM WAITING FOR A NUMBER
 TO BE ISSUED TO ME), AND (2) I AM NOT SUBJECT TO BACKUP WITHHOLDING BECAUSE
 I AM EXEMPT FROM BACKUP WITHHOLDING OR I HAVE NOT BEEN NOTIFIED BY THE
 INTERNAL REVENUE SERVICE (IRS) THAT I AM SUBJECT TO BACKUP WITHHOLDING AS A
 RESULT OF A FAILURE TO REPORT ALL INTEREST OR DIVIDENDS, OR THE IRS HAS
 NOTIFIED ME THAT I AM NO LONGER SUBJECT TO BACKUP WITHHOLDING. SEE THE
 "GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER" ON ACCOUNT
 INFORMATION FORM, CONTAINED IN THE APPENDIX TO THE ACCOMPANYING PROSPECTUS.
 
      SIGNATURE             DATE              NAME (PRINT) AND TITLE (IF ANY)
SIGN 
HERE ________________________________     ______________________________________
 
     ________________________________     ______________________________________
________________________________________________________________________________
 
D. OPTIONAL TELEPHONE EXCHANGE (SEE "EXCHANGE PRIVILEGE")
  [_] GOLDMAN, SACHS & CO. IS HEREBY AUTHORIZED TO ACCEPT AND ACT UPON
  TELEPHONE INSTRUCTIONS FROM THE UNDERSIGNED OR ANY OTHER PERSON FOR THE
  EXCHANGE OF SHARES/UNITS OF THE FUND INTO ANY FUND DESCRIBED IN THE
  ACCOMPANYING PROSPECTUS. THE UNDERSIGNED UNDERSTANDS AND AGREES THAT NEITHER
  THE APPLICABLE FUND NOR GOLDMAN, SACHS & CO. WILL BE LIABLE FOR ANY LOSS,
  EXPENSE, OR COST ARISING OUT OF ANY TELEPHONE REQUEST EFFECTED HEREUNDER.
<PAGE>
 
- --------------------------------------------------------------------------------
 
E. OPTIONAL REDEMPTION PLANS--CHECK APPROPRIATE BOX (SEE "REDEMPTION OF
   UNITS/SHARES")
   [_] 1. I AUTHORIZE GOLDMAN, SACHS & CO. TO HONOR TELEPHONE, TELEGRAPHIC, OR
   OTHER INSTRUCTIONS WITHOUT SIGNATURE GUARANTEE, FROM ANY PERSON FOR THE
   REDEMPTION OF SHARES FOR THE ABOVE ACCOUNT PROVIDED THAT THE PROCEEDS ARE
   TRANSMITTED TO THE FOLLOWING BANK ACCOUNT(S) ONLY. I UNDERSTAND ANY CHANGES
   TO THE FOLLOWING INFORMATION MUST BE MADE IN WRITING TO GOLDMAN, SACHS & CO.,
   MUST CONTAIN THE APPROPRIATE NUMBER OF SIGNATURES LISTED BELOW AND ALL
   SIGNATURES MUST BE SIGNATURE GUARANTEED. ABSENT ITS OWN GROSS NEGLIGENCE,
   NEITHER THE APPLICABLE FUND NOR GOLDMAN, SACHS & CO. SHALL BE LIABLE FOR SUCH
   REDEMPTIONS OR FOR PAYMENTS MADE TO ANY UNAUTHORIZED ACCOUNT.
                                       OR
   [_] 2. I HAVE FURNISHED GOLDMAN, SACHS & CO. WITH A SIGNATURE GUARANTEE (SEE
   SECTION G). I AUTHORIZE GOLDMAN, SACHS & CO. TO HONOR TELEPHONE, TELEGRAPHIC,
   OR OTHER INSTRUCTIONS, FROM ANY PERSON FOR THE REDEMPTION OF SHARES FOR THE
   ABOVE ACCOUNT PROVIDED THAT THE PROCEEDS ARE TRANSMITTED TO THE FOLLOWING
   BANK ACCOUNT(S) ONLY. ANY CHANGES TO THE FOLLOWING INFORMATION MUST BE MADE
   IN WRITING TO GOLDMAN, SACHS & CO. (BUT WITHOUT SIGNATURE GUARANTEE) AND
   CONTAIN THE APPROPRIATE NUMBER OF SIGNATURES LISTED BELOW. ABSENT ITS OWN
   GROSS NEGLIGENCE, NEITHER THE APPLICABLE FUND NOR GOLDMAN, SACHS & CO. SHALL
   BE LIABLE FOR SUCH REDEMPTIONS OR FOR PAYMENTS MADE TO ANY UNAUTHORIZED
   ACCOUNT.
 
PLEASE COMPLETE THE FOLLOWING BANK ACCOUNT INFORMATION AND PLACE A LINE THROUGH
THE UNUSED PORTION. ADDITIONAL INSTRUCTIONS MAY BE ADDED ON SEPARATE PAGES, IF
NECESSARY.
 
- --------------------------------------------------------------------------------
BANK NAME                                 BANK ROUTING NO.
 
- --------------------------------------------------------------------------------
STREET ADDRESS       CITY          STATE          ZIP
 
- --------------------------------------------------------------------------------
ACCOUNT NAME         ACCOUNT NO.
 
================================================================================
 
- --------------------------------------------------------------------------------
BANK NAME                                 BANK ROUTING NO.
 
- --------------------------------------------------------------------------------
STREET ADDRESS       CITY          STATE          ZIP
 
- --------------------------------------------------------------------------------
ACCOUNT NAME         ACCOUNT NO.
 
================================================================================

- --------------------------------------------------------------------------------
BANK NAME                                 BANK ROUTING NO.
 
- --------------------------------------------------------------------------------
STREET ADDRESS       CITY          STATE          ZIP
 
- --------------------------------------------------------------------------------
ACCOUNT NAME         ACCOUNT NO.
 
================================================================================
 
- --------------------------------------------------------------------------------
BANK NAME                                 BANK ROUTING NO.
 
- --------------------------------------------------------------------------------
STREET ADDRESS       CITY          STATE          ZIP
 
- --------------------------------------------------------------------------------
ACCOUNT NAME         ACCOUNT NO.
 
NUMBER OF BANK ACCOUNT DESTINATIONS COMPLETED IN SECTION E OF THIS FORM: [_]
 
================================================================================
   [_] 3. SPECIAL DRAFT (TRANSFER AGENT TO SUPPLY)
   [_] 4. BY MAIL

<PAGE>
 
F. SIGNATURE AUTHORIZATION

   BY THE EXECUTION OF THIS ACCOUNT INFORMATION FORM, THE UNDERSIGNED REPRESENTS
   AND WARRANTS THAT IT HAS FULL RIGHT, POWER AND AUTHORITY TO MAKE THE
   INVESTMENT APPLIED FOR PURSUANT TO THIS APPLICATION AND IS ACTING FOR ITSELF
   OR IN SOME FIDUCIARY CAPACITY IN MAKING SUCH INVESTMENT, AND THE
   INDIVIDUAL(S) SIGNING ON BEHALF OF THE UNDERSIGNED REPRESENT AND WARRANT THAT
   THEY ARE DULY AUTHORIZED TO SIGN THIS APPLICATION AND TO PURCHASE AND REDEEM
   UNITS/SHARES ON BEHALF OF THE UNDERSIGNED. THE UNDERSIGNED AFFIRMS THAT IT
   HAS RECEIVED A CURRENT FUND PROSPECTUS. 

   THE UNDERSIGNED UNDERSTANDS THAT A LESSER DEGREE OF FLEXIBILITY CONCERNING
   THE PRECISE TIMING OF A REDEMPTION OF ITS INVESTMENT IN THE GS ADJUSTABLE
   RATE GOVERNMENT AGENCY FUND, GS CORE FIXED INCOME FUND, GS SHORT-TERM
   GOVERNMENT AGENCY FUND, GS SHORT DURATION TAX-FREE FUND OR GS GOVERNMENT
   AGENCY PORTFOLIO (FOR FINANCIAL INSTITUTIONS), AS WELL AS ALL OTHER NON-MONEY
   MARKET FUNDS, INCREASES THE LIKELIHOOD THAT THE SHAREHOLDER WILL BE REQUIRED
   TO REDEEM SHARES UNDER UNFAVORABLE MARKET CONDITIONS. IF SHARES ARE REDEEMED
   AT A DISADVANTAGEOUS TIME, THE VALUE OF THE FUND'S SHARES UPON REDEMPTION MAY
   BE LESS THAN THE PRICE AT WHICH THE FUND'S SHARES WERE PURCHASED. SINCE NONE
   OF THE FUNDS LISTED IN THIS PARAGRAPH IS A MONEY MARKET FUND OR MAINTAINS A
   CONSTANT NET ASSET VALUE PER SHARE, THE UNDERSIGNED MAY EXPERIENCE A LOSS OF
   PRINCIPAL ON ITS INVESTMENTS IN ANY SUCH FUND DURING ANY PARTICULAR PERIOD.


               SIGNATURE                       NAME (PRINT) AND TITLE (IF ANY)
               ---------                       -------------------------------
 
SIGN ___________________________________     __________________________________
HERE
     ___________________________________     __________________________________

     ___________________________________     __________________________________

NUMBER OF SIGNATURES REQUIRED TO MAKE CHANGES TO THIS FORM: [_]
- --------------------------------------------------------------------------------
G. SIGNATURE GUARANTEE
                                                 AFFIX GUARANTEE STAMP HERE
     ___________________________________    
        SIGNATURE GUARANTEED BY

     ___________________________________    
         AUTHORIZED SIGNATURE
- --------------------------------------------------------------------------------
<PAGE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
  NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY REPRE-
SENTATIONS OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS, AND, IF GIVEN OR
MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING
BEEN AUTHORIZED. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY ANY SECURITIES OTHER THAN THE SECURITIES TO
WHICH IT RELATES OR AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY
SUCH SECURITIES IN ANY CIRCUMSTANCES IN WHICH SUCH OFFER OR SOLICITATION IS
UNLAWFUL. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER
SHALL, UNDER ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE HAS BEEN NO
CHANGE IN THE AFFAIRS OF THE TRUST OR THE FUND SINCE THE DATE HEREOF OR THAT
THE INFORMATION CONTAINED HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO ITS
DATE.
 
                               ----------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                       PAGE
                                                                       ----
<S>                                                                    <C>
Summary..............................................................    2
Financial Highlights.................................................    7
Investment Objective and Policies....................................    8
Investment Adviser...................................................    9
Special Investment Methods...........................................    9
Yield, Market Value and Risk Considerations of Mortgage-Backed 
 Securities..........................................................   13
Other Investments and Practices......................................   14
Investment Restrictions..............................................   18
Portfolio Turnover...................................................   18
Management...........................................................   19
Dividends............................................................   20
Net Asset Value......................................................   21
Performance Information..............................................   21
Shares of the Trust..................................................   22
Taxation.............................................................   24
Additional Information...............................................   25
Reports to Shareholders..............................................   26
Purchase of Institutional Shares.....................................   26
Exchange Privilege...................................................   27
Redemption of Institutional Shares...................................   28
Appendix A...........................................................  A-1
Account Information Form
</TABLE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
                                 GS SHORT-TERM
                            GOVERNMENT AGENCY FUND
                             INSTITUTIONAL SHARES
 
                                  MANAGED BY
 
                              GOLDMAN SACHS FUNDS
                               MANAGEMENT, L.P.
                                AN AFFILIATE OF
                             GOLDMAN, SACHS & CO.
 
                                 -------------
 
                                  PROSPECTUS
 
                                 -------------
 
                             GOLDMAN, SACHS & CO.
 
 
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                                 GS SHORT-TERM
                            GOVERNMENT AGENCY FUND
                                SERVICE SHARES
 
                                  MANAGED BY
                                  ----------

                     GOLDMAN SACHS FUNDS MANAGEMENT, L.P.
                                AN AFFILIATE OF
                             GOLDMAN, SACHS & CO.
 
                                 -----------
 
  GS Short-Term Government Agency Fund (the "Fund") is one fund in a family of
funds advised by Goldman Sachs Funds Management, L.P. (the "Investment
Adviser") or its affiliates, Goldman Sachs Asset Management and Goldman Sachs
Asset Management International. The Fund is organized as a separate
diversified portfolio of Goldman Sachs Trust (the "Trust"), an open-end,
management investment company.
 
  The Fund's objective is to achieve a high level of current income.
Secondarily, the Fund may, in seeking current income, also consider the
potential for capital gain. The Fund pursues its objectives through investment
in securities issued or guaranteed by the U.S. Government, its agencies or
instrumentalities and repurchase agreements pertaining thereto. These
securities include mortgage pass-through securities and other securities
representing an interest in or collateralized by mortgages. Under normal
circumstances, substantially all of the Fund's assets will be invested in
securities issued or guaranteed by the U.S. Government, its agencies or
instrumentalities.
 
  Goldman Sachs Funds Management, L.P., New York, New York, an affiliate of
Goldman, Sachs & Co., serves as the Fund's investment adviser. Goldman, Sachs
& Co. serves as the Fund's distributor and transfer agent. The Trust's
custodian is State Street Bank and Trust Company.
 
  This Prospectus, which sets forth concisely the information about the Trust
and the Fund that a prospective investor ought to know before investing in
Service Shares, should be retained for future reference. A Statement of
Additional Information (the "Additional Statement"), dated March 1, 1995,
containing further information about the Trust and the Fund which may be of
interest to investors, has been filed with the Securities and Exchange
Commission, is incorporated herein by reference in its entirety, and may be
obtained without charge from institutions ("Service Organizations") that hold,
directly or through an agent, Service Shares for the benefit of their
customers, or Goldman, Sachs & Co. by calling the telephone number, or writing
to one of the addresses, listed below.
 
SERVICE SHARES OF THE FUND 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 SERVICE SHARES OF THE
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.
 
GOLDMAN SACHS TRUST                      GOLDMAN SACHS FUNDS MANAGEMENT, L.P.
4900 SEARS TOWER                         INVESTMENT ADVISER
CHICAGO, ILLINOIS 60606                  ONE NEW YORK PLAZA
                                         NEW YORK, NEW YORK 10004
 
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR                              GOLDMAN, SACHS & CO.
85 BROAD STREET                          TRANSFER AGENT
NEW YORK, NEW YORK 10004                 4900 SEARS TOWER
 
TOLL FREE (IN U.S.)......................CHICAGO, ILLINOIS 60606
                                         800-621-2550
 
                 The date of this Prospectus is March 1, 1995.
<PAGE>
 
                                    SUMMARY
 
                                  INTRODUCTION
 
  GS Short-Term Government Agency Fund (the "Fund") is one fund in a family of
funds advised by Goldman Sachs Funds Management, L.P. (the "Investment
Adviser") or its affiliates, Goldman Sachs Asset Management and Goldman Sachs
Asset Management International. The Fund is organized as a separate diversified
portfolio of Goldman Sachs Trust (the "Trust"), an open-end, management
investment company organized.
 
                       INVESTMENT OBJECTIVE AND POLICIES
 
  The Fund's objective is to achieve a high level of current income.
Secondarily, the Fund may, in seeking current income, also consider the
potential for capital gain. The Fund invests exclusively in (a) securities
issued or guaranteed as to principal and interest by the U.S. Government, its
agencies or instrumentalities ("U.S. Government securities") deemed to have
remaining maturities or (in the case of mortgage-related securities) estimated
average lives of 6 years or less, and (b) repurchase agreements pertaining
thereto. The Fund will invest under normal market conditions, at least 65% of
its total assets in securities issued by U.S. Government agencies or
instrumentalities and in repurchase agreements pertaining to U.S. Government
securities. The U.S. Government securities in which the Fund may invest include
mortgage-related securities. Under normal circumstances, substantially all of
the Fund's assets will be invested in securities issued or guaranteed by the
U.S. Government, its agencies or instrumentalities.
 
  The Fund may employ certain active management techniques to hedge the
interest rate risks associated with the Fund's portfolio securities, to enhance
its return and to seek to reduce fluctuation in its net asset value. These
include, but are not limited to, mortgage and interest rate swaps and interest
rate floors, caps and collars. The Fund may also utilize portfolio securities
lending, mortgage dollar rolls and repurchase agreements in an attempt to
enhance the return achieved by the Fund. See "Investment Objective and
Policies" and "Other Investments and Practices." There can be no assurance that
the Fund will achieve its investment objective.
 
  The Fund may, for temporary defensive purposes, hold or invest more than 35%
of its total assets in cash, U.S. Treasury securities or high quality money
market instruments, including commercial paper, bankers' acceptances,
repurchase agreements or other debt obligations with a remaining maturity of
one year or less. The Fund will maintain a dollar weighted average portfolio
maturity (as defined below) of 3 years or less.
 
                               INVESTMENT ADVISER
 
  Pursuant to an Investment Advisory Agreement, Goldman Sachs Funds Management,
L.P., an affiliate of Goldman, Sachs & Co. ("Goldman Sachs"), serves as the
Fund's investment adviser. In this capacity, the Investment Adviser provides
investment advisory and administrative services and receives from the Fund a
monthly fee equal on an annual basis to 0.50% of the Fund's average daily net
assets. Goldman Sachs Funds Management, L.P. is registered with the Securities
and Exchange Commission (the "SEC") as an investment adviser. See "Investment
Adviser" and "Management--Investment Adviser."
 
                   PURCHASE AND REDEMPTION OF SERVICE SHARES
 
  It is expected that all purchasers of Service Shares of the Fund will be
Service Organizations or their nominees. Customers of Service Organizations may
invest in Service Shares only through their Service
 
                                       2
<PAGE>
 
Organizations. Service Shares of the Fund may be purchased by Service
Organizations through Goldman Sachs at the current net asset value per share
without the imposition of a sales load. The Fund does 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. See "Purchase of Service Shares." The Fund will redeem
its Service Shares upon request of a shareholder on any Business Day at the net
asset value next determined after receipt of such request in proper form. See
"'Redemption of Service Shares."
 
                         DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs serves as the distributor to and transfer agent for the Fund.
Under the Distribution Agreement with the Fund, Goldman Sachs acts as exclusive
agent for the Fund in the sale of shares. Under the Transfer Agency Agreement
with the Fund, Goldman Sachs provides transfer agency services and responds to
inquiries from Service Organizations. See "Management--Distributor and Transfer
Agent."
 
                                  RISK FACTORS
 
  INVESTMENT IN MORTGAGE-BACKED SECURITIES GENERALLY. The Fund's investments in
mortgage pass-through securities and other securities representing an interest
in or collateralized by adjustable-rate and fixed-rate mortgage loans
("Mortgage-Backed Securities") entail certain risks. These risks include the
failure of an issuer or guarantor to meet its obligations, adverse interest
rate changes, adverse economic, real estate or unemployment trends, failures in
connection with processing of transactions and the effects of prepayments on
mortgage cash flows. The Fund's policy of investing in securities issued by
U.S. Government agencies or instrumentalities is designed, however, to minimize
credit and performance related risks otherwise associated with Mortgage-Backed
Securities.
 
  The securities in the Fund's portfolio will tend to decrease in value when
interest rates rise and increase in value when interest rates fall. Because the
Fund's investments are interest rate sensitive, the Fund's performance will
depend in large part upon the ability of the Fund to respond to fluctuations in
market interest rates and to utilize appropriate strategies to maximize returns
to the Fund, while attempting to minimize the associated risks to its invested
capital. Operating results will also depend upon the availability of
opportunities for the investment of the Fund's assets, including purchases and
sales of suitable securities.
 
  YIELD CHARACTERISTICS AND MARKET RISKS. The yield characteristics of the
Mortgage-Backed Securities in which the Fund may invest differ from those of
traditional fixed-income securities. The major differences typically include
more frequent interest and principal payments (usually monthly) on Mortgage-
Backed Securities, and the adjustability of interest rates and the possibility
that prepayments of principal may be made at any time.
 
  Prepayment rates on Mortgage-Backed Securities are influenced by changes in
current interest rates and a variety of economic, geographic, social and other
factors and cannot be predicted with certainty.
 
                                       3
<PAGE>
 
Both adjustable rate mortgage loans and fixed rate mortgage loans may be
subject to a greater rate of principal prepayments in a declining interest rate
environment and to a lesser rate of principal prepayments in an increasing
interest rate environment. Under certain interest rate and prepayment rate
scenarios, the Fund may fail to recoup fully its investment in some of the
Mortgage-Backed Securities it holds notwithstanding a direct or indirect
governmental or agency guarantee. The Fund intends to use hedging techniques to
control this risk. See "Investment Objective and Policies" and "Other
Investments and Practices." When the Fund reinvests amounts representing
scheduled payments and unscheduled prepayments of principal, it may receive a
rate of interest that is lower than the rate on its existing portfolio of
mortgage pass-through securities. Thus, Mortgage-Backed Securities, and
adjustable rate mortgage pass-through securities in particular, may be less
effective than other types of U.S. Government securities as a mean of "locking
in" interest rates.
 
  OTHER INVESTMENTS AND PRACTICES. The Fund may invest in other instruments,
including direct obligations of the United States, and notes, bonds and
discount notes of U.S. Government agencies or instrumentalities. The Fund may
engage in certain other investment practices that also involve special risks.
These include, but are not limited to, the use of mortgage and interest rate
swaps and interest rate floors, caps and collars, making forward commitments,
lending portfolio securities, entering into mortgage dollar rolls and
repurchase agreements. See "Other Investments and Practices."
 
  CONFLICTS OF INTEREST. The involvement of Goldman Sachs, its divisions and
affiliates (including the Investment Adviser), partners and officers, in the
investment activities and business operations of the Fund may present certain
conflicts of interest, as described under "Management--Investment Adviser."
 
                                DIVIDEND POLICY
 
  The Fund intends that substantially all of its net investment income will be
declared as a dividend daily to shareholders of record as of 3:00 p.m. Chicago
time on that day and will be paid monthly. Over the course of the fiscal year,
dividends accrued and paid will constitute all or substantially all of the
Fund's net investment income. From time to time a portion of such dividends may
constitute a return of capital. The Fund also intends that any net realized
capital gains, if any, after offset by any available capital loss carryforwards
from prior taxable years, will be declared as a dividend at least annually.
Recordholders of Service Shares will receive dividends in additional Service
Shares of the Fund or may elect to receive cash as described under "Dividends."
 
                              ADDITIONAL SERVICES
 
  The Trust, on behalf of the Fund, has adopted a Service Plan with respect to
the Service Shares of the Fund which authorizes the 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 Fund, 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 Fund attributable to or held in the name of the
Service Organization for its customers. See "Additional Services."
 
                                       4
<PAGE>
 
 
                               FEES AND EXPENSES
                               (SERVICE SHARES)*
 
<TABLE>
<CAPTION>
                                                             GS SHORT-TERM
                                                         GOVERNMENT AGENCY FUND
                                                         ----------------------
<S>                                                      <C>
SHAREHOLDER TRANSACTION EXPENSES:
    Maximum Sales Load Imposed on Purchases.............          None
    Maximum Sales Load Imposed on Reinvested Dividends..          None
    Redemption Fees.....................................          None
    Exchange Fees.......................................          None
ANNUAL FUND OPERATING EXPENSES:
(AS A PERCENTAGE OF AVERAGE NET ASSETS)
    Management Fees (after waiver)......................          0.40%***
    Service Fees........................................          0.50%**
    Other Expenses (after expense limitation)...........          0.05%***
                                                                  ----
        TOTAL FUND OPERATING EXPENSES (AFTER EXPENSE
         LIMITATION)....................................          0.95%***
                                                                  ====
</TABLE>
 
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        5 YEARS      10 YEARS
           ------       -------        -------      --------
           <S>          <C>            <C>          <C>
           $10            $30            $53          $117
</TABLE>
- --------
*The information set forth in the foregoing table and hypothetical example
   relates only to Service Shares of the Fund. See "Shares of the Trust."
   Institutional Shares and Administration Shares of the Fund are subject to
   different fees and expenses. Institutional Shares are not subject to any
   administration or service fees. Administration Shares are subject to an
   administration fee of up to 0.25% of average daily net assets. All other
   expenses related to Institutional Shares and Administration Shares are the
   same as for Service Shares.
**Service Organizations (other than broker-dealers) may charge other fees to
   their customers who are beneficial owners of Service Shares in connection
   with their customer accounts. See "Additional Services."
***The Investment Adviser agreed that a portion of its advisory fee (0.10% on
   an annual basis) would not be imposed on the Fund and that it would reduce
   or limit certain "Other Expenses" of the Fund (excluding advisory fees,
   payments to Service Organizations, taxes, interest and brokerage and
   litigation, indemnification and other extraordinary expenses) to the extent
   such expenses exceeded 0.05% per annum of the Fund's average net assets. Had
   the reduction of the advisory fee and the expense limitation not been
   reflected in the above table, the management fees, other expenses and total
   operating expenses attributable to Service Shares of the Fund would have
   been 0.50%, 0.09% and 1.09%, respectively. The foregoing table and example
   also reflect current operating expenses that will be applicable on an
   ongoing basis. See "Management--Investment Adviser."
 
                                       5
<PAGE>
 
 
  The purpose of the foregoing table is to assist investors in understanding
the various costs and expenses of the Fund that an investor in the Fund will
bear directly or indirectly. The costs and expenses included in the table and
hypothetical example above, which are based on amounts that would have been
incurred for the fiscal year ended October 31, 1994 had Service Shares been
issued, 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, the Fund's actual performance
will vary and may result in an actual return greater or less than 5%. See
"Management" and "Additional Services." Investors should be aware that, due to
the service fees, a long-term shareholder in the Fund may pay over time more
than the economic equivalent of the maximum front end sales charge permitted
under the rules of the National Association of Securities Dealers, Inc.
 
                                       6
<PAGE>
 
                             FINANCIAL HIGHLIGHTS
         SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD
 
  The following data with respect to Institutional Shares and Administration
Shares of the Fund outstanding during the periods indicated has been audited
by Arthur Andersen LLP, independent public accountants, as indicated in their
report incorporated by reference and attached to the Additional Statement from
the Fund's annual report to shareholders for the fiscal year ended October 31,
1994 (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
writing to any of the addresses on the cover of this Prospectus.
 
<TABLE>
<CAPTION>
                                                                              DISTRIBUTIONS TO
                           INCOME FROM INVESTMENT OPERATIONS                    SHAREHOLDERS
                           -------------------------------------   ----------------------------------------
                                                                               IN
                                           NET          TOTAL                EXCESS       FROM                  NET
                 NET ASSET   NET       REALIZED AND     INCOME     FROM NET  OF NET   NET REALIZED             ASSET
                 VALUE AT  INVEST-      UNREALIZED       FROM      INVEST-   INVEST-    GAIN ON      FROM    VALUE AT
                 BEGINNING  MENT       GAIN (LOSS)    INVESTMENT     MENT     MENT     INVESTMENT  PAID-IN      END      TOTAL
                 OF PERIOD INCOME     ON INVESTMENTS  OPERATIONS    INCOME   INCOME   TRANSACTIONS CAPITAL   OF PERIOD RETURN(B)
                 --------- -------    --------------  ----------   --------  -------  ------------ --------  --------- ---------
<S>              <C>       <C>        <C>             <C>          <C>       <C>      <C>          <C>       <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1994-
Institutional
shares..........  $10.14   $0.5628(f)    $(0.4592)(f)  $0.1036(f)  $(0.5598)     --     $(0.0438)       --     $9.64      0.99%
1994-
Administration
shares..........   10.14    0.5329(f)     (0.4539)(f)   0.0790(f)   (0.5352)     --      (0.0438)       --      9.64      0.73
1993-Institu-
tional shares...   10.16    0.5627        (0.0135)(a)   0.5492      (0.5627) (0.0065)        --         --     10.14      5.55
1993-
Administration
shares(d).......   10.23    0.2725        (0.0900)(a)   0.1825      (0.2725)     --          --         --     10.14      1.74
1992-Institu-
tional shares...   10.22    0.6703        (0.0600)(a)   0.6103      (0.6703)     --          --         --     10.16      6.24
1991-Institu-
tional shares...   10.00    0.8020         0.2200 (a)   1.0220      (0.8020)     --          --         --     10.22     10.93
1990-Institu-
tional shares...   10.07    0.8300        (0.0700)(a)   0.7600      (0.8300)     --          --         --     10.00      8.23
1989-Institu-
tional shares...   10.10    0.8800            --        0.8800      (0.8800)     --          --     (0.0300)   10.07      9.08
FOR THE PERIOD AUGUST 15, 1988 (COMMENCEMENT OF OPERATIONS) THROUGH OCTOBER 31,
- -------------------------------------------------------------------------------
1988-Institu-
tional Shares...   10.00    0.1800         0.1000       0.2800      (0.1800)     --          --         --     10.10      3.30
<CAPTION>
                                                                  RATIOS ASSUMING NO
                                                                  WAIVER OF FEES OR
                                                                  EXPENSE LIMITATION
                                                               ------------------------
                               RATIO OF                 NET
                                 NET                 ASSETS AT  RATIO OF   RATIO OF NET
                 RATIO OF NET INVESTMENT                END    EXPENSES TO  INVESTMENT
                 EXPENSES TO  INCOME TO  PORTFOLIO   OF PERIOD   AVERAGE    INCOME TO
                 AVERAGE NET   AVERAGE   TURNOVER       (IN        NET     AVERAGE NET
                    ASSETS    NET ASSETS  RATE(C)     000'S)     ASSETS       ASSETS
                 ------------ ---------- ----------- --------- ----------- ------------
<S>              <C>          <C>        <C>         <C>       <C>         <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1994-
Institutional
shares..........     0.45%       5.69%    289.79%    $193,095     0.59%        5.55%
1994-
Administration
shares..........     0.70        5.38     289.79          730     0.84         5.24
1993-Institu-
tional shares...     0.45        5.46     411.66      359,708     0.64         5.31
1993-
Administration
shares(d).......     0.70(e)     4.84(e)  411.66       16,490     0.80(e)      4.74(e)
1992-Institu-
tional shares...     0.45        6.60     216.07      277,927     0.69         6.36
1991-Institu-
tional shares...     0.45        8.25     155.44      158,848     0.79         7.91
1990-Institu-
tional shares...     0.45        8.62     173.21       68,995     0.95         8.12
1989-Institu-
tional shares...     0.46        8.71     137.37       31,015     1.39         7.78
FOR THE PERIOD AUGUST 15, 1988 (COMMENCEMENT OF OPERATIONS) THROUGH OCTOBER 31,
- -------------------------------------------------------------------------------
1988-Institu-
tional Shares...     0.55(e)     8.55(e)  167.00(e)    39,052     1.42(e)      7.68(e)
</TABLE>
- ----
(a)  Includes balancing effect of calculating per share amounts.
(b) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions and a complete redemption
    of the investment at the net asset value at the end of the period.
(c) Includes effect of mortgage dollar roll transactions.
(d) Administration share activity commenced on April 15, 1993.
(e) Annualized.
(f) Calculated based on the average shares outstanding methodology.
 
                                       7
<PAGE>
 
                       INVESTMENT OBJECTIVE AND POLICIES
 
  The Fund seeks to achieve a high level of current income. Secondarily, the
Fund may, in seeking current income, also consider the potential for capital
gain. There can be no assurance that the objective of the Fund will be
realized.
 
  SELECTION OF PORTFOLIO INVESTMENTS. The Fund invests exclusively in (a)
securities issued or guaranteed as to principal and interest by the U.S.
Government, its agencies or instrumentalities ("U.S. Government securities")
deemed to have remaining maturities or (in the case of mortgage-related
securities) estimated average lives of six years or less and (b) repurchase
agreements collateralized by U.S. Government Securities. Under normal market
conditions, the Fund will invest at least 65% of its total assets in securities
issued by U.S. Government agencies or instrumentalities and in repurchase
agreements pertaining to U.S. Government securities. Under normal
circumstances, substantially all of the Fund's assets will be invested in
securities issued or guaranteed by the U.S. Government, its agencies or
instrumentalities. The Fund may, for temporary defensive purposes, hold or
invest more than 35% of its total assets in cash, U.S. Treasury securities or
high quality money market instruments, including commercial paper, bankers'
acceptances, repurchase agreements or other debt obligations with a remaining
maturity of one year or less.
 
  PORTFOLIO DURATION. The Fund will maintain an option-adjusted duration of not
more than 3 years, however, its actual option-adjusted duration is expected to
be approximately 2 years under normal interest rate conditions. The Fund's
duration is a measure of the price sensitivity of the portfolio, including
expected cash flow and mortgage prepayments under a wide range of interest rate
scenarios. Maturity measures only the time until final payment is due on a bond
or other debt security; it takes no account of the pattern of a security's cash
flows over time, including how cash flow is affected by prepayments and by
changes in interest rates. In computing the duration of its portfolio, the Fund
will have to 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. The Fund may use various
techniques to shorten or lengthen the option-adjusted duration of its
portfolio, including the acquisition of debt obligations at a premium or
discount, mortgage and interest rate swaps and interest rate floors, caps and
collars.
 
  OTHER INVESTMENT POLICIES. The Fund may also employ certain active management
techniques to hedge the interest rate risks associated with the Fund's
portfolio securities, to enhance its return and to seek to reduce fluctuation
in its net asset value. These techniques include, but are not limited to,
mortgage and interest rate swaps and interest rate floors, caps and collars.
The Fund may also employ other investment techniques to enhance returns, such
as loans of portfolio securities, mortgage dollar rolls, forward commitments
and repurchase agreements.
 
  When interest rates decline, the value of a portfolio invested in fixed-rate
debt securities can be expected to rise. Conversely, when interest rates rise,
the value of a portfolio invested in fixed-rate debt securities can be expected
to decline. In contrast, since interest rates on adjustable-rate mortgage loans
are reset periodically, yields of portfolio securities representing interests
in such loans will gradually align themselves to reflect changes in market
interest rates, causing the value of such adjustable-rate securities to
fluctuate less dramatically in response to interest rate fluctuations than
would fixed-rate debt securities. The Investment Adviser expects the Fund's net
asset value to be relatively stable during normal market conditions. This is
because the Fund will maintain a maximum option-adjusted duration of not more
than 3 years and will utilize certain interest rate hedging techniques.
However, a sudden and extreme increase
 
                                       8
<PAGE>
 
in prevailing interest rates may cause a decline in the Fund's net asset value.
Conversely, a sudden and extreme decline in interest rates could result in an
increase in the Fund's net asset value.
 
  The Fund's investment objective of seeking to achieve a high level of current
income and the policies specified under "Investment Restrictions" may only be
changed with the approval of the holders of a majority of the outstanding
shares of the Fund. All other policies described herein may be changed by a
vote of the Trustees. There can be no assurance that the Fund will be
successful in achieving its investment objective. An investment in shares of
the Fund does not constitute a complete investment program. Investors may wish
to complement an investment in the Fund with other types of investments.
 
                               INVESTMENT ADVISER
 
  The Fund's investment adviser is Goldman Sachs Funds Management, L.P., an
affiliate of Goldman Sachs. The management services provided by the Investment
Adviser are subject to the general supervision of the Trust's Board of
Trustees. The Investment Adviser and its affiliates serve a wide range of
clients including private and public pension funds, endowments, foundations,
banks, thrifts, insurance companies, corporations, and private investors and
family groups.
 
  Founded in 1869, Goldman Sachs is among the oldest and largest investment
banking firms in the United States. Goldman Sachs is a leader in virtually
every field of investing and financing, participating in financial markets
worldwide and serving individuals, institutions, corporations and governments.
Goldman Sachs is headquartered in New York and has offices throughout the
United States and in Beijing, Frankfurt, George Town, Hong Kong, London,
Madrid, Milan, Montreal, Osaka, Paris, Seoul, Shanghai, Singapore, Sydney,
Taipei, Tokyo, Toronto, Vancouver and Zurich.
 
  The Investment Adviser is able to draw on the research and market expertise
of Goldman Sachs, whose investment research effort is one of the largest in the
industry. The in-depth information and analyses generated by Goldman Sachs's
research analysts, economists and portfolio strategists are available to the
Investment Adviser.
 
                           SPECIAL INVESTMENT METHODS
 
U.S. GOVERNMENT SECURITIES
 
  U.S. Government securities include several different kinds of obligations.
Such securities include a variety of United States Treasury obligations,
including bills and notes, which principally differ only in their interest
rates, maturities and times of issuance, and obligations issued or guaranteed
by United States Government agencies or instrumentalities which are supported
by (a) the full faith and credit of the United States Treasury (such as
securities of the Government National Mortgage Association ("Ginnie Mae")), (b)
the authority of the United States Government to purchase certain obligations
of the issuer (such as securities of the Federal National Mortgage Association
("Fannie Mae") and the Federal Home Loan Mortgage Corporation ("Freddie Mac")),
(c) the limited authority of the issuer to borrow from the United States
Treasury (such as securities of the Student Loan Marketing Association) or (d)
only the credit of the issuer. No assurance can be given that the United States
Government will provide financial support to United States Government agencies
or instrumentalities described in clauses (b), (c) or (d) above in the future,
other than as set forth above, since it is not obligated to do so by law. U.S.
Government securities also include securities related to pools of mortgages as
discussed below.
 
                                       9
<PAGE>
 
CHARACTERISTICS OF MORTGAGE-BACKED SECURITIES
 
  Mortgage-Backed Securities are securities that directly or indirectly
represent participations in, or are collateralized by and payable from,
mortgage loans secured by real property. The investment characteristics of
adjustable and fixed rate Mortgage-Backed Securities differ from those of
traditional fixed income securities. The major differences include the payment
of interest and principal on Mortgage-Backed Securities on a more frequent
(usually monthly) schedule, and the possibility that principal may be prepaid
at any time due to prepayments on the underlying mortgage loans or other
assets. These differences can result in significantly greater price and yield
volatility than is the case with traditional fixed income securities. As a
result, if the Fund purchases Mortgage-Backed Securities at a premium, a faster
than expected prepayment rate will reduce both the market value and the yield
to maturity from those which were anticipated. A prepayment rate that is slower
than expected will have the opposite effect of increasing yield to maturity and
market value. Conversely, if the Fund purchases Mortgage-Backed Securities at a
discount, faster than expected prepayments will increase, while slower than
expected prepayments will reduce, yield to maturity and market value. The
Investment Adviser will seek to manage these potential risks and benefits by
investing in a variety of Mortgage-Backed Securities and by using certain
hedging techniques. See "Other Investments and Practices."
 
  Prepayments on a pool of mortgage loans are influenced by a variety of
factors, including economic conditions, changes in mortgagors' housing needs,
job transfers, unemployment, mortgagors' net equity in the mortgaged properties
and servicing decisions. The timing and level of prepayments cannot be
predicted. Generally, however, prepayments on adjustable rate mortgage loans
and fixed rate mortgage loans will increase during a period of falling mortgage
interest rates and decrease during a period of rising mortgage interest rates.
Accordingly, the amounts of prepayments available for reinvestment by the Fund
are likely to be greater during a period of declining mortgage interest rates.
If general interest rates also decline, such prepayments are likely to be
reinvested at lower interest rates than the Fund was earning on the Mortgage-
Backed Securities that were prepaid.
 
  GUARANTEED MORTGAGE-BACKED SECURITIES IN WHICH THE FUND INVESTS. All of the
Fund's investments in Mortgage-Backed Securities will be issued or guaranteed
by the U.S. Government or one of its agencies or instrumentalities, including
but not limited to, Ginnie Mae, Fannie Mae and Freddie Mac. Ginnie Mae
securities are backed by the full faith and credit of the U.S. Government,
which means that the U.S. Government guarantees that the interest and principal
will be paid when due. Fannie Mae securities and Freddie Mac securities are not
backed by the full faith and credit of the U.S. Government; however, the
ability of these agencies to borrow from the U.S. Treasury makes their
securities high quality securities with minimal credit risks. There are several
types of guaranteed Mortgage-Backed Securities currently available, including
guaranteed mortgage pass-through certificates and multiple-class securities,
which include guaranteed Real Estate Mortgage Investment Conduit ("REMIC")
pass-through certificates and stripped Mortgage Backed-Securities. The Fund
will be permitted to invest in other types of Mortgage-Backed Securities that
may be available in the future to the extent investment in such securities is
consistent with its investment objective and policies.
 
  MULTIPLE CLASS PASS-THROUGH SECURITIES AND COLLATERALIZED MORTGAGE
OBLIGATIONS. The Fund may invest in multiple class securities issued by U.S.
Government agencies and instrumentalities such as Fannie Mae or Freddie Mac,
including guaranteed collateralized mortgage obligations ("CMOs") and REMIC
pass-through or participation certificates. 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.
 
                                       10
<PAGE>
 
  CMOs and guaranteed REMIC pass-through certificates ("REMIC Certificates")
issued by Fannie Mae and Freddie Mac are types of multiple class pass-through
securities. Investors may purchase beneficial interests in REMICs, which are
known as "regular" interests or "residual" interests. The Fund does not intend
to purchase residual interests in CMOs or REMICs. The REMIC Certificates
represent beneficial ownership interests in a REMIC trust, generally consisting
of mortgage loans or Fannie Mae, Freddie Mac or Ginnie Mae guaranteed mortgage
pass-through certificates (the "Mortgage Assets"). The obligations of Fannie
Mae or Freddie Mac under their respective guaranty of the REMIC Certificates
are obligations solely of Fannie Mae or Freddie Mac, respectively.
 
  Fannie Mae REMIC Certificates are issued and guaranteed as to timely
distribution of principal and interest by Fannie Mae. In addition, Fannie Mae
will be obligated to distribute the principal balance of each class of REMIC
Certificates in full, whether or not sufficient funds are otherwise available.
 
  For Freddie Mac REMIC Certificates, Freddie Mac guarantees the timely payment
of interest, and also guarantees the payment of principal as payments are
required to be made on the underlying mortgage participation certificates
("PCs"). PCs represent undivided interests in specified level payment,
residential mortgages or participations therein purchased by Freddie Mac and
placed in a PC pool. With respect to principal payments on PCs, Freddie Mac
generally guarantees ultimate collection of all principal of the related
mortgage loans without offset or deduction. Freddie Mac also guarantees timely
payment of principal on certain PCs.
 
  CMOs and REMIC Certificates are issued in multiple classes. Each class of
CMOs and REMIC Certificates, often referred to as a "tranche," is issued at a
specific adjustable or fixed interest rate and must be fully retired no later
than its final scheduled distribution date. Principal prepayments on the
underlying mortgage loans or the Mortgage Assets underlying the CMOs or REMIC
Certificates may cause some or all of the classes of CMOs or REMIC Certificates
to be retired substantially earlier than their final distribution dates.
Generally, interest is paid or accrues on all classes of CMOs or REMIC
Certificates on a monthly basis.
 
  The principal of and interest on the Mortgage Assets may be allocated among
the several classes of CMOs or REMIC Certificates in various ways. In certain
structures (known as "sequential pay" CMOs or REMIC Certificates), payments of
principal, including any principal prepayments, on the Mortgage Assets
generally are applied to the classes of CMOs or REMIC Certificates in the order
of their respective final distribution dates. Thus, no payment of principal
will be made on any class of sequential pay CMOs or REMIC Certificates until
all other classes having an earlier final distribution date have been paid in
full.
 
  Additional structures of CMOs and REMIC Certificates include, among others,
"parallel pay" CMOs and REMIC Certificates. Parallel pay CMOs or REMIC
Certificates are those which are structured to apply principal payments and
prepayments of the Mortgage Assets to two or more classes concurrently on a
proportionate or disproportionate basis. These simultaneous payments are taken
into account in calculating the final distribution date of each class.
 
  A wide variety of REMIC Certificates may be issued in the parallel pay or
sequential pay structures. These securities include accrual certificates (also
known as "Z-Bonds"), which only accrue interest at a specified rate until all
other certificates having an earlier final distribution date have been retired
and are converted thereafter to an interest-paying security, and planned
amortization class ("PAC") certificates, which are parallel pay REMIC
Certificates which generally require that specified amounts of principal be
 
                                       11
<PAGE>
 
applied on each payment date to one or more classes of REMIC Certificates (the
"PAC Certificates"), even though all other principal payments and prepayments
of the Mortgage Assets are then required to be applied to one or more other
classes of the Certificates. The scheduled principal payments for the PAC
Certificates generally have the highest priority on each payment date after
interest due has been paid to all classes entitled to receive interest
currently. Shortfalls, if any, are added to the amount payable on the next
payment date. The PAC Certificate payment schedule is taken into account in
calculating the final distribution date of each class of PAC. In order to
create PAC tranches, one or more tranches generally must be created that absorb
most of the volatility in the underlying mortgage assets. These tranches tend
to have market prices and yields that are much more volatile than the PAC
classes.
 
  STRIPPED MORTGAGE-BACKED SECURITIES. The Fund may invest in stripped
mortgage-backed securities ("SMBS"), which are derivative multiple class
mortgage-backed securities. The Fund may only invest in SMBS issued or
guaranteed by the U.S. Government, its agencies or instrumentalities.
 
  SMBS are usually structured with two classes that receive different
proportions of the interest and principal distributions from a pool of Mortgage
Assets. A common type of SMBS will have one class receiving all of the interest
from the Mortgage Assets, while the other class will receive all of the
principal. However, in some instances, one class will receive some of the
interest and most of the principal while the other class will receive most of
the interest and the remainder of the principal. If the underlying Mortgage
Assets experience greater than anticipated prepayments of principal, the Fund
may fail to fully recoup its initial investment in these securities. Although
the market for such securities is increasingly liquid, certain SMBS may not be
readily marketable and will be considered illiquid for purposes of the Fund's
limitation on investments in illiquid 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 Assets 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 Investment Adviser will seek
to manage these risks (and potential benefits) by investing in a variety of
such securities and by using certain hedging techniques. See "Other Investments
and Practices."
 
ZERO COUPON BONDS
 
  The Fund may invest in zero coupon securities, zero coupon U.S. Treasury
securities (which are Treasury notes and bonds that have been stripped of their
unmatured interest coupons), the coupons themselves and receipts or
certificates representing interests in such stripped debt obligations. 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 market
prices of securities that pay interest periodically and are likely to respond
to a greater degree to changes in interest rates than interest bearing
securities having similar maturities and credit qualities. The Fund's
investments in zero coupon securities or other stripped securities 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.
 
                                       12
<PAGE>
 
                YIELD, MARKET VALUE AND RISK CONSIDERATIONS OF 
                          MORTGAGE-BACKED SECURITIES
 
  The Fund may invest in certain Mortgage-Backed Securities, such as interest-
only and principal-only SMBS, that are extremely sensitive to changes in
prepayments and interest rates. Even though such securities have been issued or
guaranteed by an agency or instrumentality of the U.S. Government, under
certain interest rate or prepayment rate scenarios, the Fund may fail to fully
recover its investment in such securities.
 
  The investment characteristics of Mortgage-Backed Securities differ from
those of traditional fixed income securities. The major differences typically
include more frequent interest and principal payments, usually monthly, and the
possibility that unscheduled prepayments of principal may be made at any time.
Prepayment rates are influenced by changes in current interest rates and a
variety of economic, geographic, social and other factors and cannot be
predicted with certainty. Adjustable rate mortgage loans may be subject to a
greater prepayment rate in a declining interest rate environment. The yields to
maturity of the Mortgage-Backed Securities in which the Fund may invest will be
affected by the actual rate of payment (including prepayments) of principal of
the underlying mortgage loans. The mortgage loans underlying such securities
generally may be prepaid at any time without penalty. In a fluctuating interest
rate environment, a predominant factor affecting the prepayment rate on a pool
of mortgage loans is the difference between the interest rates on the mortgage
loans and prevailing mortgage loan interest rates (giving consideration to the
cost of any refinancing). In general, if interest rates on new mortgage loans
fall sufficiently below the interest rates on existing fixed rate mortgage
loans underlying mortgage pass-through securities, the rate of prepayment would
be expected to increase. Conversely, if mortgage loan interest rates rise above
the interest rates on the fixed rate mortgage loans underlying the mortgage
pass-through securities, the rate of prepayment may be expected to decrease.
 
  The rate of principal prepayments with respect to adjustable rate mortgages
has fluctuated in recent years. As is the case with fixed rate mortgage loans,
adjustable rate mortgages may be subject to a greater rate of principal
prepayments in a declining interest rate environment. For example, if
prevailing interest rates fall significantly, mortgages could be subject to
higher prepayment rates than if prevailing interest rates remain constant
because the availability of fixed rate mortgage loans at competitive interest
rates may encourage mortgagors to refinance their mortgages to "lock-in" a
lower fixed interest rate. Conversely, if prevailing interest rates rise
significantly, adjustable rate mortgages may prepay at lower rates than if
prevailing rates remain at or below those in effect at the time such mortgages
were originated due, for example, to the unavailability of lower rate
alternatives. There can be no certainty as to the rate of prepayments on the
mortgages in either stable or changing interest rate environments. In addition,
there can be no certainty as to whether increases in the principal balances of
adjustable rate mortgages due to the addition of deferred interest may result
in a default rate higher than that on mortgages that do not provide for
negative amortization. Other factors affecting prepayment of mortgages include
changes in mortgagors' housing needs, job transfers, unemployment, mortgagors'
net equity in the mortgage properties and servicing decisions.
 
  The Fund's reinvestment of principal payments and prepayments received on a
mortgage pass-through security may be made at rates higher or lower than the
rate payable on such security, thus affecting the return realized by the Fund.
In addition, the receipt of interest payments monthly rather than semi-annually
by the Fund has a compounding effect that may increase the yield to the Fund
relative to debt obligations that pay interest semi-annually. Due to these
factors, Mortgage-Backed Securities may also be less effective than U.S.
Treasury securities of similar maturity at maintaining yields during periods
 
                                       13
<PAGE>
 
of changing interest rates. Prepayments may have a disproportionate effect on
certain Mortgage-Backed Securities such as SMBS and certain other multiple
class pass-through securities. The Fund may purchase Mortgage-Backed Securities
at a premium or at a discount.
 
  RISKS ASSOCIATED WITH DERIVATIVE MORTGAGE-BACKED SECURITIES. Derivative
Mortgage-Backed Securities are subject to different combinations of interest
rate and/or prepayment risks. 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. The Investment Adviser may use
derivative Mortgage-Backed Securities and other derivative securities
consistent with the Fund's investment objective for a variety of purposes
including adjusting the average duration or interest rate sensitivity of the
Fund's portfolio or attempting to enhance the Fund's total return. The
Investment Adviser manages the risks and benefits of derivative Mortgage-Backed
Securities and other derivative securities by prudent analysis, selection and
monitoring of such securities included in the Fund's portfolio.
 
  The risk of faster than anticipated prepayments generally adversely affects
interest-only securities (IOs), super floaters and premium priced Mortgage-
Backed Securities. The risk of slower than anticipated prepayments generally
adversely affects principal-only securities (POs), floating rate securities
subject to interest rate caps, support tranches and discount priced Mortgage-
Backed Securities.
 
  RISKS ASSOCIATED WITH OTHER DERIVATIVE FLOATING RATE SECURITIES. Other types
of floating rate derivative securities present more complex types of interest
rate risks. For example, range floaters are subject to the risk that the coupon
will be reduced to 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.
 
                        OTHER INVESTMENTS AND PRACTICES
 
  INVERSE FLOATING RATE SECURITIES. The Fund may invest in leveraged inverse
floating rate debt instruments ("inverse floaters"). The interest rate on an
inverse floater resets in the opposite direction from the market rate of
interest to which the inverse floater is indexed. An inverse floater may be
considered to be leveraged to the extent that its interest rate varies by a
magnitude that exceeds the magnitude of the change in the index rate of
interest. The higher degree of leverage inherent in inverse floaters is
associated with the greater volatility in their market values. Accordingly, the
duration of an inverse floater may exceed its stated final maturity. Certain
inverse floaters may be deemed to be illiquid securities for purposes of the
Fund's 15% limitation on investments in such securities.
 
  INTEREST RATE SWAPS, MORTGAGE SWAPS, CAPS, FLOORS AND COLLARS. The Fund may
enter into interest rate swaps and mortgage swaps for hedging purposes and to
increase total return. The Fund may also enter into other types of interest
rate swap arrangements such as caps, floors and collars. Interest rate swaps
involve the exchange by the Fund with another party of their respective
commitments to pay or receive interest, e.g., an exchange of floating rate
payments for fixed rate payments. Mortgage swaps are similar to interest rate
swaps in that they represent commitments to pay and receive interest. The
notional principal amount, however, is tied to a reference pool or pools of
mortgages. The purchase of an interest rate cap entitles the purchaser, to the
extent that a specified index exceeds a predetermined interest rate, to receive
payment of interest on a notional principal amount from the party selling such
interest rate cap. The purchase of an interest rate floor entitles the
purchaser, to the extent that a specified index falls below a predetermined
interest rate, to receive payment of interest on a notional principal
 
                                       14
<PAGE>
 
amount from the party selling such interest rate floor. An interest rate collar
is the combination of a cap and a floor that preserves a certain return within
a predetermined range of interest rates. Since interest rate swaps, mortgage
swaps, caps, floors and collars are individually negotiated, the Fund expects
to achieve an acceptable degree of correlation between its portfolio
investments and its swap, cap, floor and collar positions entered into for
hedging purposes.
 
  The Fund will enter into interest rate swaps and mortgage swaps only on a net
basis, which means that the two payment streams are netted out, with the Fund
receiving or paying, as the case may be, only the net amount of the two
payments. Interest rate swaps and mortgage swaps do not involve the delivery of
securities, other underlying assets or principal. Accordingly, the risk of loss
with respect to interest rate swaps and mortgage swaps is limited to the net
amount of payments that the Fund is contractually obligated to make. If the
other party to an interest rate swap or mortgage swap defaults, the Fund's risk
of loss consists of the net amount of payments that the Fund is contractually
entitled to receive, if any. To the extent the net amount of an interest rate
swap or mortgage swap is held in a segregated account, consisting of cash and
liquid, high grade debt securities, the Fund and the Investment Adviser believe
that swaps do not constitute senior securities under the Investment Company Act
of 1940, as amended (the "Act") and, accordingly, will not treat them as being
subject to the Fund's borrowing restriction.
 
  The Fund will not enter into any interest rate swap, mortgage swap, or
interest rate cap, floor or collar transactions unless the unsecured commercial
paper, senior debt or claims paying ability of the other party is rated either
AA or A-1 or better by Standard & Poor's Ratings Group ("S&P") or Aa or P-1 or
better by 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 use of interest rate and mortgage swaps as well as interest rate caps,
floors and collars, 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 market values and interest rates, the investment performance of
the Fund would be less favorable than it would have been if these investment
techniques were not used. The staff of the SEC considers interest rate swaps
and mortgage swaps, as well as interest rate floors and collars, to be illiquid
securities for purposes of the Fund's 15% limitation on illiquid investments.
 
  LENDING OF PORTFOLIO SECURITIES. The 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 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 the Fund. See "Investment Restrictions" in the
Additional Statement. The 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.
 
  WHEN-ISSUED AND FORWARD COMMITMENT SECURITIES. The Fund may purchase
securities on a when-issued basis. When-issued transactions arise when
securities are purchased by the 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. The Fund
may also purchase securities on a forward commitment basis. In a forward
commitment transaction, the Fund
 
                                       15
<PAGE>
 
contracts to purchase securities for a fixed price at a future date beyond
customary settlement time. The Fund is required to hold and maintain in a
segregated account until the settlement date cash or liquid, high grade debt
obligations in an amount sufficient to meet the purchase price. Alternatively,
the Fund may enter into offsetting contracts for the forward sale of other
securities that it owns. 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. Although the Fund would
generally purchase securities on a when-issued or forward commitment basis with
the intention of actually acquiring securities for its portfolio, the Fund may
dispose of a when-issued security or forward commitment prior to settlement if
the Investment Adviser deems it appropriate to do so.
 
  MORTGAGE DOLLAR ROLLS. The 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 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 (often referred to as the
"drop") or fee income plus the interest earned on the cash proceeds of the
securities sold until the settlement date of 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 compared with what such performance would
have been without the use of mortgage dollar rolls. All cash proceeds will be
invested in instruments that are permissible investments for the Fund. The Fund
will hold and maintain in a segregated account until the settlement date cash
or liquid, high grade debt securities in an amount equal to the forward
purchase price.
 
  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.
 
  Mortgage dollar rolls involve certain risks including the following: if the
broker-dealer to whom the Fund sells the security becomes insolvent, the Fund's
right to purchase or repurchase the mortgage-related securities subject to the
mortgage dollar roll may be restricted and the instrument which the Fund is
required to repurchase may be worth less than an instrument which the Fund
originally held. Successful use of mortgage dollar rolls will depend upon the
Investment Adviser's ability to manage its interest rate and mortgage
prepayments exposure. For these reasons, there is no assurance that mortgage
dollar rolls can be successfully employed.
 
  REPURCHASE AGREEMENTS. The 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. In a repurchase agreement, the Fund
purchases a debt security from a seller which undertakes to repurchase the
security at a specified resale price on an agreed future date (ordinarily a
week or less). The resale price generally exceeds the purchase price by an
amount which reflects an agreed-upon market interest rate for the term of the
repurchase agreement. The primary risk is that, if the seller defaults, the
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. Repurchase
agreements maturing in more than seven days are considered by the Fund to be
illiquid. In
 
                                       16
<PAGE>
 
addition, the Fund, together with other registered investment companies having
advisory agreements with the Investment Adviser or any of 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.
 
  ILLIQUID SECURITIES. The Fund will not invest more than 15% of its net assets
in securities which are illiquid, including securities that are not readily
marketable, repurchase agreements maturing in more than seven days, interest
rate and mortgage swaps, interest rate caps, floors and collars, certain SMBS
and securities that are restricted as to resale. However, a restricted security
is not considered to be illiquid if the Trustees of the Trust determine, based
upon the Investment Adviser's continuing review of the trading markets for the
specific restricted security, under guidelines adopted by the Trustees of the
Trust and subject to the Trustees' oversight and ultimate responsibility, that
such restricted security eligible for resale under Rule 144A under the
Securities Act of 1933 is liquid. In addition, a repurchase agreement which by
its terms can be liquidated before its nominal fixed term on seven days or less
notice is regarded as a liquid instrument. Subject to the 15% limitation on
illiquid securities investments, the Fund may acquire U.S. Government
securities in a private placement.
 
  Since it is not possible to predict with assurance exactly how this market
for restricted securities sold and offered under Rule 144A will develop, the
Board of Trustees will carefully monitor the Fund's investments in these
securities, focusing on such important factors, among others, as valuation,
credit quality, liquidity and availability of information. This investment
practice could have the effect of increasing the level of illiquidity in the
Fund to the extent that qualified institutional buyers become for a time
uninterested in purchasing these restricted securities.
 
  OTHER INVESTMENT COMPANIES. The Fund reserves the right to invest up to 10%
of its total assets, calculated at the time of purchase, in the securities of
other investment companies, including business development companies and small
business investment companies. The Fund may not invest more than 5% of its
total assets in the securities of any one investment company or acquire more
than 3% of the voting securities of any other investment company. Pursuant to
an exemptive order obtained from the SEC, other investment companies in which
the Fund may invest include money market funds for which the Investment Adviser
or any of its affiliates serves as investment adviser. The Fund will indirectly
bear its proportionate share of any management fees and other expenses paid by
investment companies in which it invests in addition to the advisory fees paid
by the Fund. However, to the extent that the Fund invests in a money market
fund for which the Investment Adviser or any of its affiliates acts as adviser,
the advisory fees payable by the Fund to the Investment Adviser will be reduced
by an amount equal to the Fund's proportionate share of the advisory fees paid
by such money market fund to the Investment Adviser or any of its affiliates.
 
  INSTRUMENT MATURITY. The Mortgage-Backed Securities in which the Fund invests
will have an estimated average life, as determined by the Investment Adviser,
of six years or less. Average life estimates are based upon anticipated
prepayment patterns which, in turn, are based upon past prepayment patterns,
prevailing interest rates and other factors. Due to actual prepayment
experience, however, the remaining estimated average life of an investment
after purchase by the Fund may increase to more than six years or may decrease
at a rate faster than anticipated. The Fund's other securities generally will
have remaining maturities of 6 years or less and repurchase agreements will
have remaining maturities of less than one year.
 
                                       17
<PAGE>
 
  The Fund may purchase securities with variable or floating interest rates. In
calculating average portfolio duration or maturity, such securities will
generally be treated as having a maturity equal to the time remaining until
their interest rate is next reset, unless the Investment Adviser believes some
other treatment to be more appropriate, for example, because of the market
price impact of interest rate caps, floors and collars. In addition, the Fund
also may purchase securities that have demand or put features. In calculating
average portfolio duration or maturity, these securities generally will be
treated as having a maturity equal to the period remaining until the Fund can
obtain the principal amount through exercise of such feature.
 
  OTHER INFORMATION. The Investment Adviser seeks to enhance the Fund's income
by taking advantage of yield disparities or other factors (such as anticipated
changes in relative value which have not yet occurred) that occur or are
expected to occur in the securities markets. The Fund may dispose of any
security prior to its maturity if such disposition and reinvestment of the
proceeds are expected to enhance income consistent with the Investment
Adviser's judgment as to a desirable maturity structure or if such disposition
is believed to be advisable due to other circumstances or considerations.
 
                            INVESTMENT RESTRICTIONS
 
  The Fund is subject to certain investment restrictions which, as described in
more detail in the Additional Statement, are fundamental policies that cannot
be changed without the approval of a majority of the outstanding shares of the
Fund. Among other restrictions, as a diversified Fund, the Fund may not, with
respect to 75% of its total assets, purchase the securities of any one issuer
(except U.S. Government securities) if more than 5% of the value of the Fund's
assets would be invested in such issuer. The Fund has the authority to borrow
money but only (a) as a temporary measure, and then only in amounts not
exceeding 5% of the value of the Fund's net assets (excluding any amount
borrowed) or (b) from banks, provided that immediately after any such borrowing
all borrowings of the Fund do not exceed one-third of the Fund's net assets
(excluding any amount borrowed). The Fund does not intend to borrow for
investment leverage purposes but solely for extraordinary or emergency purposes
or to facilitate management of the Fund by enabling it to meet redemption
requests when the liquidation of portfolio instruments is deemed to be
disadvantageous or not possible. The Fund may not purchase securities while
such borrowings exceed 5% of the value of the Fund's total assets.
 
                               PORTFOLIO TURNOVER
 
  It is anticipated that the portfolio turnover rate of the Fund will vary from
year to year. The portfolio turnover rate is computed by dividing the lesser of
the 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 the 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
the Fund consistent with the Fund's investment objective and portfolio
management policies. A higher rate of portfolio turnover results in increased
transaction costs to the Fund. The portfolio turnover rate includes the effect
of entering into mortgage dollar rolls.
 
                                       18
<PAGE>
 
                                   MANAGEMENT
 
TRUSTEES AND OFFICERS
 
  The Trust's Board of Trustees is 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 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 ADVISER
 
  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,
acts as the investment adviser of the Fund. Goldman Sachs Funds Management,
L.P. was registered as an investment adviser in 1990. As of January 31, 1995,
the Investment Adviser, together with its affiliates, acted as investment
adviser, administrator or distributor for approximately $48.7 billion in
assets.
 
  Under its Investment Advisory Agreement with the Fund, Goldman Sachs Funds
Management, L.P., subject to the general supervision of the Board of Trustees,
manages the Fund's portfolio and provides for the administration of all of the
Fund's other affairs. It is the responsibility of the Investment Adviser to
make investment decisions for the Fund and to place purchase and sale orders
for the Fund's portfolio transactions. 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. Goldman Sachs has agreed to permit the Fund to
use the name "Goldman Sachs" or a derivative thereof as part of the Fund's name
for as long as the Investment Advisory Agreement is in effect.
 
  The Fund's portfolio managers are Jonathan A. Beinner and Theodore T. Sotir.
Mr. Beinner specializes in investing in a particular type of security the Fund
may hold. Mr. Sotir helps with overall portfolio strategy and is a member of
the Investment Adviser's risk control team. Mr. Beinner joined the Investment
Adviser in 1990 and is currently a Vice President, after working in the trading
and arbitrage group of Franklin Savings Association. Mr. Sotir joined the
Investment Adviser in 1993 and is currently a Vice President, after working as
a portfolio manager at Fidelity Management Trust Company. Prior to joining
Fidelity, Mr. Sotir worked for Goldman Sachs in the mortgage securities
department for six years.
 
  As compensation for the services rendered to the Fund by the Investment
Adviser pursuant to the Investment Advisory Agreement, and the assumption by
the Investment Adviser of the expenses related thereto, the Fund pays the
Investment Adviser a fee, computed daily and payable monthly, at an annual rate
equal to 0.50% of the Fund's average daily net assets. For the fiscal year
ended October 31, 1994, the Fund paid an advisory fee to the Investment Adviser
at the annual rate of 0.40% of the Fund's average daily net assets.
 
  The Investment Adviser has voluntarily agreed not to impose a portion of its
advisory fee (equal to 0.10% of the Fund's average daily net assets) and to
reduce or otherwise limit certain expenses of the Fund (excluding advisory
fees, payments to Service Organizations (as defined below), taxes, interest and
brokerage and litigation, indemnification and other extraordinary expenses) to
the extent such expenses exceed 0.05% annually of the Fund's average net
assets. Such reductions or limits, if any, are calculated monthly on a
cumulative basis and may be discontinued or modified by the Investment Adviser
at its
 
                                       19
<PAGE>
 
discretion at any time. The Investment Adviser has also agreed to reduce its
fees payable (to the extent of such fees) by the amount the Fund's expenses
would, absent the fee reduction, exceed the applicable expense limitations
imposed by state securities administrators. See "Management--Expenses" in the
Additional Statement.
 
  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 the Fund or limit its 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 Fund and/or which engage in
and compete for transactions in the same types of securities and instruments as
the Fund. 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 Fund and it is not anticipated that the
Investment Adviser will have access to proprietary information for the purpose
of managing the Fund. The results of the Fund's investment activities,
therefore, may differ from those of Goldman Sachs and its affiliates and it is
possible that the 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. From time to time, the 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 "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, serves as the exclusive
distributor of the Fund's shares. Goldman Sachs, 4900 Sears Tower, Chicago,
Illinois, also serves as the Fund's transfer agent (the "Transfer Agent").
Shareholders of record with inquiries regarding the Fund should contact Goldman
Sachs (as Transfer Agent) at the address or the telephone number set forth on
the cover page of this Prospectus.
 
                                   DIVIDENDS
 
  The Fund intends that all or substantially all of its net investment income
will be declared as a dividend on each day to shareholders of record as of 3:00
p.m. Chicago time on that day. Over the course of the fiscal year, dividends
accrued and paid will constitute all or substantially all of the Fund's net
investment income. From time to time a portion of such dividends may constitute
a return of capital. The Fund also intends that all net realized long-term and
short-term 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.
 
  The 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 the Fund's net asset value as of 3:00 p.m. Chicago
time. On days on which net asset value is not calculated, such determination is
made as of 3:00 p.m. Chicago time.
 
                                       20
<PAGE>
 
  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 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 the Fund a portion of the
net asset value per share may be represented by undistributed income of the
Fund or unrealized appreciation of the Fund's portfolio securities. Therefore,
subsequent distributions (or portions thereof) on such shares 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.
 
                                NET ASSET VALUE
 
  The net asset value per share is calculated by the Fund's custodian as of the
close of regular trading on the New York Stock Exchange (normally 3:00 p.m.
Chicago time, 4:00 p.m. New York time), immediately after determination of the
income to be declared as a dividend on each Business Day (as such term is
defined under "Additional Information"). Net asset value per share of each
class is calculated by determining the net assets attributable to each class
and dividing by the number of outstanding shares of that class.
 
  Investments in U.S. Government Securities, including Mortgage-Backed
Securities, and other debt obligations are valued at fair value, based on yield
equivalents, a pricing matrix or other sources, under valuation procedures
established by the Trust's Board of Trustees. Other portfolio securities for
which accurate market quotations are readily available are valued on the basis
of quotations furnished by pricing services or provided by dealers in such
securities. Portfolio securities for which accurate market quotations are not
readily available are valued in accordance with the Trust's valuation
procedures. 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 the Fund may publish yield and average annual total return
in advertisements and communications to shareholders or prospective investors.
 
  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 net
asset value 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.
 
                                       21
<PAGE>
 
  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 (i.e., net asset value) 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. The Fund may also from time
to time advertise total return on an 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, the Fund may from time to time advertise
its performance relative to certain performance rankings and indices.
 
  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 ending net asset value for the
period for which the distribution rates are being calculated.
 
  The investment results of the 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 Fund may, in its discretion, from time to time make a
list of the Fund's holdings available to investors upon request.
 
  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 of the Fund for the same
period will differ. Due to the fees payable under the Service Plan and the
Administration Plan, the investment performance, for any period, of the
Institutional Shares will always be higher than that of the Service Shares and
the Administration Shares and the investment performance of the Administration
Shares will always be higher than that of the Service Shares. See "Shares of
the Trust" below.
 
                              SHARES OF THE TRUST
 
  The Fund is a series of Goldman Sachs Trust, which was organized under the
laws of The Commonwealth of Massachusetts on September 24, 1987 as a
Massachusetts business trust under an Agreement and Declaration of Trust, as
amended (the "Trust Agreement"). Under the Trust Agreement, the Trustees are
authorized to issue an unlimited number of shares of beneficial interest, $.001
par value per share. The Trustees of the Trust are responsible for the overall
management and supervision of its affairs. The Trustees of the Trust have
authority under the Trust Agreement to create and classify shares of beneficial
interest in separate series, without further action by shareholders. As of the
date of this Prospectus, the Trustees have authorized shares of the Fund and
ten other series. 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. Pursuant thereto, the Trustees have authorized the
issuance of three classes of shares of the Fund. These classes are:
Institutional Shares, Administration Shares and Service Shares. As of October
31, 1994, no Service Shares of the Fund were outstanding.
 
  Each Institutional Share, Administration Share and Service Share of the Fund
represents an equal proportionate interest in the assets belonging to the Fund.
All Fund expenses are based on a percentage of the Fund's aggregate average net
assets, except that the respective administration and service fees relating to
a particular class will be borne exclusively by that class. It is contemplated
that most Administration Shares and Service Shares will be held in accounts of
which the record owner is a bank or other institution acting, directly or
through an agent, as nominee for its customers who are the beneficial
 
                                       22
<PAGE>
 
owners of the shares or another organization designated by such bank or
institution. Administration Shares and Service Shares will each be marketed
only to such institutional investors, at net asset value with no sales load.
Institutional Shares may be purchased for accounts in the name of an investor
or institution that is not compensated by the Fund for services provided to the
institution's customers. Administration Shares may be purchased for accounts
held in the name of an institution that provides certain account administration
services to its customers, including maintenance of account records and
processing orders to purchase, redeem or exchange Administration Shares.
Administration Shares bear the cost of account administration fees at the
annual rate of up to 0.25% of the average daily net assets of such
Administration Shares. Service Shares may be purchased for accounts held in the
name of an institution that provides certain account administration and
shareholder liaison services to its customers, including maintenance of account
records and processing orders to purchase, redeem or exchange Service Shares,
responding to customer inquiries and assisting customers with investment
procedures. Service Shares bear the cost of service fees at the annual rate of
up to 0.50% of the average daily net assets of such Service Shares.
(Institutions that provide services to holders of Administration or Service
Shares are referred to in this Prospectus as "Service Organizations").
 
  It is possible that an institution or its affiliate may offer different
classes of shares (i.e., Institutional, Administration and Service Shares) to
its customers and thus receive different compensation with respect to different
classes of shares of the Fund. Administration Shares and Service Shares may
each have certain exclusive voting rights on matters relating to their
respective plans. Shares of each class may be exchanged only for shares of the
same class in another fund and certain money market funds sponsored by Goldman
Sachs. The Fund may amend such policy in the future. Dividends paid by the
Fund, if any, with respect to each class of shares will be calculated in the
same manner, at the same time on the same day and will be in the same amount,
except for differences caused by the fact that the respective fees under
Administration and Service Plans relating to a particular class will be borne
exclusively by that class. Similarly, the net asset value per share will vary
depending on the class of shares purchased.
 
  Certain aspects of the shares may be altered, after advance notice to
shareholders, if it is deemed necessary in order to satisfy certain tax
regulatory requirements.
 
  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 Fund available for distribution to such shareholders. All shares entitle
their holders to one vote per share, are freely transferable and have no
preemptive, subscription or conversion rights.
 
  Under Massachusetts law, there is a remote possibility that shareholders of a
business trust could, under certain circumstances, be held personally liable as
partners for the obligations of such trust. The Trust Agreement contains
provisions intended to limit such liability and to provide indemnification out
of Trust property of any shareholder charged or held personally liable for
obligations or liabilities of the Trust solely by reason of being or having
been a shareholder of the Trust and not because of such shareholder's acts or
omissions or for some other reason. Thus, the risk of a shareholder incurring
financial loss on account of shareholder liability is limited to circumstances
in which the Trust itself would be unable to meet its obligations.
 
  Unless otherwise required by the Act, ordinarily it will not be necessary for
the Trust to hold annual meetings of shareholders. As a result, shareholders
may not consider each year the election of Trustees or the appointment of
independent accountants. Shareholders may remove a Trustee by the affirmative
 
                                       23
<PAGE>
 
vote of at least two-thirds of the Trust's outstanding shares and the Trustees
must promptly call a meeting for such purpose when requested to do so in
writing by the recordholders of not less than 10% of the outstanding shares of
the Trust. Shareholders may, under certain circumstances, communicate with
other shareholders in connection with requesting a special meeting of
shareholders. The Board of Trustees, however, 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 share
certificates. 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. Shares and any dividends and
distributions paid by the Fund are reflected in account statements from the
Transfer Agent.
 
                                    TAXATION
 
FEDERAL TAXES
 
  The Fund is treated as a separate entity for tax purposes. The Fund has
qualified and elected to be treated as a regulated investment company under
Subchapter M of the Code, and it intends to continue to qualify for such
treatment. To qualify for treatment as a regulated investment company, the 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, the 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 the Fund from net investment income, the excess of net
short-term capital gain over net long-term capital loss and original issue
discount or certain market discount income will be taxable to shareholders as
ordinary income. Dividends paid by the Fund from the excess of net long-term
capital gain over net short-term capital loss will be taxable as long-term
capital gains regardless of how long the shareholders have held their shares.
These tax consequences will apply regardless of whether distributions are
received in cash or reinvested in shares. Certain distributions paid by the
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 Fund 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 on which a shareholder
may recognize a gain or loss.
 
  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 the Fund with their correct taxpayer
identification number and certain certifications 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 Fund.
 
                                       24
<PAGE>
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local or
foreign taxes on payments received from the Fund. A state income (and possibly
local income and/or intangible property) tax exemption is generally available
to the extent the Fund's distributions are derived from interest on (or, in the
case of intangibles 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.
 
  Shareholders should consult their own tax advisors regarding specific
questions as to United States federal, state, local and foreign tax
consequences of investing in the Fund in their particular circumstances. See
the Additional Statement for a further discussion of certain tax consequences
of investing in shares of the Fund.
 
                             ADDITIONAL INFORMATION
 
  The term "majority of the outstanding shares" of the Fund means the vote of
the lesser of (i) 67% or more of the shares present at a meeting, if the
holders of more than 50% of the outstanding shares of the Fund are present or
represented by proxy, or (ii) more than 50% of the outstanding shares of the
Fund.
 
  As used in this Prospectus, the term "Business Day" refers to those days when
the Investment Adviser, The Northern Trust Company, State Street Bank and Trust
Company and the Federal Reserve Bank of New York are open for business, which
is Monday through Friday except for holidays. Such holidays currently are: New
Year's Day (observed), Martin Luther King Day, Presidents' Day (observed), Good
Friday, Memorial Day (observed), Independence Day, Labor Day, Columbus Day,
Thanksgiving Day and Christmas. On those days when one or more of such
organizations close early as a result of such day being a partial holiday or
otherwise, the right is reserved to advance the time on that day by which
purchase and redemption requests must be received.
 
                                       25
<PAGE>
 
                              ADDITIONAL SERVICES
 
  The Trust, on behalf of the Fund, has adopted a Service Plan with respect to
the Service Shares which authorizes the Fund to compensate 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 Fund, will enter into agreements with
Service Organizations which purchase Service Shares on behalf of their
customers ("Service Agreements"). The Service Agreements will 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.
 
  Had Service Shares been outstanding during the fiscal year ended October 31,
1994, the Trust, on behalf of the Fund, would have paid the Service
Organizations fees at the annual rate of 0.50% of the Fund's average daily net
assets attributable to Service Shares.
 
  Holders of Service Shares of the Fund will bear all expenses and fees paid to
Service Organizations for their services with respect to such Shares as well as
any other expenses which are directly attributable to such Shares.
 
  Service Organizations (other than broker-dealers) 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
Fund, will accrue payments made pursuant to a Service Agreement daily. All
inquiries of beneficial owners of Service Shares should be directed to such
owners' Service Organization.
 
                            REPORTS TO SHAREHOLDERS
 
  Recordholders of Service Shares of the Fund 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
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 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
 
  It is expected that all direct purchasers of Service Shares of the Fund will
be Service Organizations or their nominees. Customers of Service Organizations
may invest in Service Shares only through their Service Organizations. Service
Shares of the Fund may be purchased by a Service Organization through Goldman
Sachs at the net asset value per share next determined after receipt from a
Service Organization
 
                                       26
<PAGE>
 
of an order without the imposition of a sales load. If, by 3:00 p.m. Chicago
time (4:00 p.m. New York time), an order, a check or a Federal Reserve draft is
received from a Service Organization by Goldman Sachs, the price per share will
be the net asset value per share computed on the day the purchase order or such
form of payment is received. See "Net Asset Value."
 
PURCHASE PROCEDURES
 
  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 a check drawn
on a foreign bank will not be accepted) or Federal Reserve draft made payable
to "Goldman Sachs Trust--GS Short-Term Government Agency Fund" and should be
directed to Goldman Sachs Trust--GS Short-Term Government Agency Fund, c/o GSAM
Shareholder Services, 4900 Sears Tower, Chicago, Illinois 60606. 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 or 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.
 
OTHER PURCHASE INFORMATION
 
  The Fund does 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 Fund reserves the right to redeem Service Shares of any Service
Shareholder whose account balance is less than $100 as a result of earlier
redemptions. Such redemptions will not be implemented if the value of such
Shareholder'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 Shareholders whose Service Shares are being redeemed to allow
them to purchase sufficient additional Service Shares to avoid such redemption.
 
PURCHASE BY FEDERAL FUNDS WIRE OR ACH TRANSFER. If a purchase order is received
from a Service Organization by Goldman Sachs by 3:00 p.m. Chicago time, the
purchased shares will be issued and dividends will begin on such shares on the
next Business Day, provided that a Federal Funds wire or an ACH transfer is
received by Northern on such day.
 
PURCHASE BY CHECK OR FEDERAL RESERVE DRAFT. If a Service Organization's check
or Federal Reserve draft is received by Goldman Sachs by 3:00 p.m. Chicago
time, the purchased shares will be issued and dividends will begin on such
shares on the next Business Day after the Service Organization's check or
Federal Reserve draft is received by Goldman Sachs.
 
  The Fund and Goldman Sachs each reserves the right to reject any specific
purchase order (including exchanges) or to restrict purchases or exchanges of
Service Shares by a particular purchaser (or group of related purchasers). The
Fund or Goldman Sachs may reject or restrict purchases or
 
                                       27
<PAGE>
 
exchanges of Service Shares by a particular purchaser or group, for example,
when a pattern of frequent purchases and sales or exchanges of Service Shares
of the Fund is evident, or if the purchase, sale or exchange orders are, or a
subsequent abrupt redemption might be, of a size that would disrupt management
of the Fund.
 
                              EXCHANGE PRIVILEGE
 
  Service Shares of the Fund may be exchanged by Service Organizations 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 relevant class of
any portfolio of Goldman Sachs Money Market Trust at the net asset value next
determined either by writing to Goldman Sachs, Attention: Goldman Sachs
Trust--GS Short-Term Government Agency Fund, 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
3:00 p.m. Chicago time). A shareholder should obtain and read the prospectus
relating to any other fund and its shares or units 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 times of drastic economic or market changes the telephone exchange
privilege may be difficult to implement. 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. 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 relevant class of any portfolio of Goldman Sachs Money Market
Trust 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 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 Fund will redeem its Service Shares upon request of the recordholder of
such Shares on any Business Day at the net asset value next determined after
the receipt by the Transfer Agent of such request in proper form. See "Net
Asset Value." If Service Shares to be redeemed were recently purchased by
check, the 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. Redemption
requests may be made by writing to or calling the Transfer Agent at the
address or telephone number set forth on the 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
 
                                      28
<PAGE>
 
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. 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 Fund, the Trust nor Goldman
Sachs will be responsible for the authenticity of redemption or exchange
instructions received by telephone. If Goldman Sachs receives a redemption
request by 3:00 p.m. Chicago time, the Service Shares to be redeemed earn
dividends with respect to the day the request is received.
 
  The Fund will arrange for the proceeds of redemptions effected by any means
to be wired to the recordholder of Service Shares. Redemption proceeds will
normally be wired on the next Business Day in Federal Funds (for a total one-
day delay), but may be paid up to seven (7) 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. Once wire transfer instructions
have been given by Goldman Sachs, neither the Fund, 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 Organization.
 
  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.
 
  Except with respect to Service Shareholders whose account balances are less
than $100, Service Shares of the Fund are not redeemable at the option of the
Fund unless the Board of Trustees of the Trust determines in its sole
discretion that failure to so redeem may have material adverse consequences to
the shareholders of the Fund. The Fund, however, assumes no responsibility to
compel redemptions.
 
                               ----------------
 
                                      29
<PAGE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
  NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY REPRE-
SENTATIONS OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS, AND, IF GIVEN OR
MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING
BEEN AUTHORIZED. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY ANY SECURITIES OTHER THAN THE SECURITIES TO
WHICH IT RELATES OR AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY
SUCH SECURITIES IN ANY CIRCUMSTANCES IN WHICH SUCH OFFER OR SOLICITATION IS
UNLAWFUL. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER
SHALL, UNDER ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE HAS BEEN NO
CHANGE IN THE AFFAIRS OF THE TRUST OR THE FUND SINCE THE DATE HEREOF OR THAT
THE INFORMATION CONTAINED HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO ITS
DATE.
 
                               ----------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           ----
<S>                                                                        <C>
Summary..................................................................    2
Financial Highlights.....................................................    7
Investment Objective and Policies........................................    8
Investment Adviser.......................................................    9
Special Investment Methods...............................................    9
Yield, Market Value and Risk Considerations of                 
 Mortgage-Backed Securities..............................................   13
Other Investments and Practices..........................................   14
Investment Restrictions..................................................   18
Portfolio Turnover.......................................................   18
Management...............................................................   19
Dividends................................................................   20
Net Asset Value..........................................................   21
Performance Information..................................................   21
Shares of the Trust......................................................   22
Taxation.................................................................   24
Additional Information...................................................   25
Additional Services......................................................   26
Reports to Shareholders..................................................   26
Purchase of Service Shares...............................................   26
Exchange Privilege.......................................................   28
Redemption of Service Shares.............................................   28
</TABLE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
                                 GS SHORT-TERM
                            GOVERNMENT AGENCY FUND
                                SERVICE SHARES
 
                                  MANAGED BY
                                  ----------
 
                              GOLDMAN SACHS FUNDS
 
                               MANAGEMENT, L.P.
                                AN AFFILIATE OF
 
                             GOLDMAN, SACHS & CO.
 
                                 ------------
 
                                  PROSPECTUS

                                 ------------
 
                             GOLDMAN, SACHS & CO.
 
 
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                                 GS SHORT-TERM
                             GOVERNMENT AGENCY FUND
                             ADMINISTRATION SHARES
 
                                   MANAGED BY
                                   ----------
 
                      GOLDMAN SACHS FUNDS MANAGEMENT, L.P.
                                AN AFFILIATE OF
                              GOLDMAN, SACHS & CO.
 
                                  ------------
 
  GS Short-Term Government Agency Fund (the "Fund") is one fund in a family of
funds advised by Goldman Sachs Funds Management, L.P. (the "Investment
Adviser") or its affiliates, Goldman Sachs Asset Management and Goldman Sachs
Asset Management International. The Fund is organized as a separate diversified
portfolio of Goldman Sachs Trust (the "Trust"), an open-end, management
investment company.
 
  The Fund's objective is to achieve a high level of current income.
Secondarily, the Fund may, in seeking current income, also consider the
potential for capital gain. The Fund pursues its objectives through investment
in securities issued or guaranteed by the U.S. Government, its agencies or
instrumentalities and repurchase agreements pertaining thereto. These
securities may include mortgage pass-through securities and other securities
representing an interest in or collateralized by mortgages. Under normal
circumstances, substantially all of the Fund's assets will be invested in
securities issued or guaranteed by the U.S. Government, its agencies or
instrumentalities.
 
  Goldman Sachs Funds Management, L.P., New York, New York, an affiliate of
Goldman, Sachs & Co., serves as the Fund's investment adviser. Goldman, Sachs &
Co. serves as the Fund's distributor and transfer agent. The Trust's custodian
is State Street Bank and Trust Company.
 
  This Prospectus, which sets forth concisely the information about the Trust
and the Fund that a prospective investor ought to know before investing in
Administration Shares, should be retained for future reference. A Statement of
Additional Information (the "Additional Statement"), dated March 1, 1995,
containing further information about the Trust and the Fund which may be of
interest to investors, has been filed with the Securities and Exchange
Commission, is incorporated herein by reference in its entirety, and may be
obtained without charge from institutions ("Service Organizations") that hold,
directly or through an agent, Administration Shares for the benefit of their
customers, or Goldman, Sachs & Co. by calling the telephone number, or writing
to one of the addresses, listed below.
 
ADMINISTRATION SHARES OF THE FUND 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 ADMINISTRATION
SHARES OF THE 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.
 
GOLDMAN SACHS TRUST                       GOLDMAN SACHS FUNDS MANAGEMENT, L.P.
4900 SEARS TOWER                          INVESTMENT ADVISER
CHICAGO, ILLINOIS 60606                   ONE NEW YORK PLAZA
                                          NEW YORK, NEW YORK 10004
 
 
GOLDMAN, SACHS & CO.
DISTRIBUTOR                               GOLDMAN, SACHS & CO.
85 BROAD STREET                           TRANSFER AGENT
NEW YORK, NEW YORK 10004                  4900 SEARS TOWER
                                          CHICAGO, ILLINOIS 60606
 
TOLL FREE (IN U.S.).......................800-621-2550
 
                 The date of this Prospectus is March 1, 1995.
<PAGE>
 
 
                                    SUMMARY
 
                                  INTRODUCTION
 
  GS Short-Term Government Agency Fund (the "Fund") is one fund in a family of
funds advised by Goldman Sachs Funds Management, L.P. (the "Investment
Adviser") or its affiliates, Goldman Sachs Asset Management and Goldman Sachs
Asset Management International. The Fund is organized as a separate diversified
portfolio of Goldman Sachs Trust (the "Trust"), an open-end, management
investment company.
 
                       INVESTMENT OBJECTIVE AND POLICIES
 
  The Fund's objective is to achieve a high level of current income.
Secondarily, the Fund may, in seeking current income, also consider the
potential for capital gain. The Fund invests exclusively in (a) securities
issued or guaranteed as to principal and interest by the U.S. Government, its
agencies or instrumentalities ("U.S. Government securities") deemed to have
remaining maturities or (in the case of mortgage-related securities) estimated
average lives of 6 years or less, and (b) repurchase agreements pertaining
thereto. The Fund will invest, under normal market conditions, at least 65% of
its total assets in securities issued by U.S. Government agencies or
instrumentalities and in repurchase agreements pertaining to U.S. Government
securities. The U.S. Government securities in which the Fund may invest include
mortgage-related securities. Under normal circumstances, substantially all of
the Fund's assets will be invested in securities issued or guaranteed by the
U.S. Government, its agencies or instrumentalities.
 
  The Fund may employ certain active management techniques to hedge the
interest rate risks associated with the Fund's portfolio securities, to enhance
its return and to seek to reduce fluctuation in its net asset value. These
include, but are not limited to, mortgage and interest rate swaps and interest
rate floors, caps and collars. The Fund may also utilize portfolio securities
lending, mortgage dollar rolls and repurchase agreements in an attempt to
enhance the return achieved by the Fund. See "Investment Objective and
Policies" and "Other Investments and Practices." There can be no assurance that
the Fund will achieve its investment objective.
 
  The Fund may, for temporary defensive purposes, hold or invest more than 35%
of its total assets in cash, U.S. Treasury securities or high quality money
market instruments, including commercial paper, bankers' acceptances,
repurchase agreements or other debt obligations with a remaining maturity of
one year or less. The Fund will maintain a dollar weighted average portfolio
maturity (as defined below) of 3 years or less.
 
                               INVESTMENT ADVISER
 
  Pursuant to an Investment Advisory Agreement, Goldman Sachs Funds Management,
L.P, an affiliate of Goldman, Sachs & Co. ("Goldman Sachs"), serves as the
Fund's investment adviser. In this capacity, the Investment Adviser provides
investment advisory and administrative services and receives from the Fund a
monthly fee equal on an annual basis to 0.50% of the Fund's average daily net
assets. Goldman Sachs Funds Management, L.P. is registered with the Securities
and Exchange Commission (the "SEC") as an investment adviser. See "Investment
Adviser" and "Management--Investment Adviser."
 
                                       2
<PAGE>
 
 
                PURCHASE AND REDEMPTION OF ADMINISTRATION SHARES
 
  It is expected that all purchasers of Administration Shares of the Fund will
be Service Organizations or their nominees. Customers of Service Organizations
may invest in Administration Shares only through their Service Organizations.
Administration Shares of the Fund may be purchased by Service Organizations
through Goldman Sachs at the current net asset value per share without the
imposition of a sales load. The Fund does 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. See "Purchase of Administration Shares." The Fund
will redeem its Administration Shares upon request of a shareholder on any
Business Day at the net asset value next determined after receipt of such
request in proper form. See "Redemption of Administration Shares."
 
                         DISTRIBUTOR AND TRANSFER AGENT
 
  Goldman Sachs serves as the distributor to and transfer agent for the Fund.
Under the Distribution Agreement with the Fund, Goldman Sachs acts as exclusive
agent for the Fund in the sale of shares. Under the Transfer Agency Agreement
with the Fund, Goldman Sachs provides transfer agency services and responds to
inquiries from Service Organizations. See "Management--Distributor and Transfer
Agent."
 
                                  RISK FACTORS
 
  INVESTMENT IN MORTGAGE-BACKED SECURITIES GENERALLY. The Fund's investments in
mortgage pass-through securities and other securities representing an interest
in or collateralized by adjustable-rate and fixed-rate mortgage loans
("Mortgage-Backed Securities") entail certain risks. These risks include the
failure of an issuer or guarantor to meet its obligations, adverse interest
rate changes, adverse economic, real estate or unemployment trends, failure in
connection with processing of transactions and the effects of prepayments on
mortgage cash flows. The Fund's policy of investing in securities issued by
U.S. Government agencies or instrumentalities is designed, however, to minimize
credit and performance related risks otherwise associated with Mortgage-Backed
Securities.
 
  The securities in the Fund's portfolio will tend to decrease in value when
interest rates rise and increase in value when interest rates fall. Because the
Fund's investments are interest rate sensitive, the Fund's performance will
depend in large part upon the ability of the Fund to respond to fluctuations in
market interest rates and to utilize appropriate strategies to maximize returns
to the Fund, while attempting to minimize the associated risks to its invested
capital. Operating results will also depend upon the availability of
opportunities for the investment of the Fund's assets, including purchases and
sales of suitable securities.
 
  YIELD CHARACTERISTICS AND MARKET RISKS. The yield characteristics of the
Mortgage-Backed Securities in which the Fund may invest differ from those of
traditional fixed-income securities. The major differences typically include
more frequent interest and principal payments (usually monthly) on Mortgage-
Backed Securities, the adjustability of interest rates and the possibility that
prepayments of principal may be made at any time.
 
                                       3
<PAGE>
 
 
  Prepayment rates on Mortgage-Backed Securities are influenced by changes in
current interest rates and a variety of economic, geographic, social and other
factors and cannot be predicted with certainty. Both adjustable rate mortgage
loans and fixed rate mortgage loans may be subject to a greater rate of
principal prepayments in a declining interest rate environment and to a lesser
rate of principal prepayments in an increasing interest rate environment. Under
certain interest rate and prepayment rate scenarios, the Fund may fail to
recoup fully its investment in some of the Mortgage-Backed Securities it holds
notwithstanding a direct or indirect governmental or agency guarantee. The Fund
intends to use hedging techniques to control this risk. See "Investment
Objective and Policies" and "Other Investments and Practices." When the Fund
reinvests amounts representing scheduled payments and unscheduled prepayments
of principal, it may receive a rate of interest that is lower than the rate on
its existing portfolio of mortgage pass-through securities. Thus, Mortgage-
Backed Securities, and adjustable rate mortgage pass-through securities in
particular, may be less effective than other types of U.S. Government
securities as a means of "locking in" interest rates.
 
  OTHER INVESTMENTS AND PRACTICES.  The Fund may invest in other instruments,
including direct obligations of the United States, and notes, bonds and
discount notes of U.S. Government agencies or instrumentalities. The Fund may
engage in certain other investment practices that also involve special risks.
These include, but are not limited to, the use of mortgage and interest rate
swaps and interest rate floors, caps and collars, making forward commitments,
lending portfolio securities, entering into mortgage dollar rolls and
repurchase agreements. See "Other Investments and Practices."
 
  CONFLICTS OF INTEREST. The involvement of Goldman Sachs, its advisers and
affiliates (including the Investment Adviser), partners and officers, in the
investment activities and business operations of the Fund may present certain
conflicts of interest, as described under "Management--Investment Adviser."
 
                                DIVIDEND POLICY
 
  The Fund intends that substantially all of its net investment income will be
declared as a dividend daily to shareholders of record as of 3:00 p.m. Chicago
time on that day and will be paid monthly. Over the course of the fiscal year,
dividends accrued and paid will constitute all or substantially all of the
Fund's net investment income. From time to time a portion of such dividends may
constitute a return of capital. The Fund also intends that any net realized
capital gains, if any, after offset by any available capital loss carryforwards
from prior taxable years, will be declared as a dividend at least annually.
Recordholders of Administration Shares will receive dividends in additional
Administration Shares of the Fund or may elect to receive cash as described
under "Dividends."
 
                              ADMINISTRATION PLAN
 
  The Trust, on behalf of the Fund, has adopted an Administration Plan with
respect to the Administration Shares of the Fund which authorizes the 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 Fund, 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 Fund attributable to or held in the name of the
Service Organization for its customers. See "Administration Plan."
 
                                       4
<PAGE>
 
 
                               FEES AND EXPENSES
                            (ADMINISTRATION SHARES)*
 
<TABLE>
<CAPTION>
                                                             GS SHORT-TERM
                                                         GOVERNMENT AGENCY FUND
                                                         ----------------------
<S>                                                      <C>
SHAREHOLDER TRANSACTION EXPENSES:
    Maximum Sales Load Imposed on Purchases.............          None
    Maximum Sales Load Imposed on Reinvested Dividends..          None
    Redemption Fees.....................................          None
    Exchange Fees.......................................          None
ANNUAL FUND OPERATING EXPENSES:
(AS A PERCENTAGE OF AVERAGE NET ASSETS)
    Management Fees (after waiver)......................          0.40%***
    Account Administration Fees.........................          0.25%**
    Other Expenses (after expense limitation)...........          0.05%***
                                                                  ----
        TOTAL FUND OPERATING EXPENSES (AFTER EXPENSE
         LIMITATION)....................................          0.70%***
                                                                  ====
</TABLE>
 
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        5 YEARS       10 YEARS
             ------        -------        -------       --------
             <S>           <C>            <C>           <C>
               $7            $22            $39           $87
</TABLE>
- --------
  * The information set forth in the foregoing table and hypothetical example
    relates only to Administration Shares of the Fund. See "Shares of the
    Trust."Institutional Shares and Service Shares of the Fund are subject to
    different fees and expenses. Institutional Shares are not subject to any
    administration or service fees. Service Shares are subject to a service fee
    of up to 0.50% of average daily net assets. All other expenses related to
    Institutional Shares and Service Shares are the same as for Administration
    Shares.
 
 ** Service Organizations (other than broker-dealers) may charge other fees to
    their customers who are beneficial owners of Administration Shares in
    connection with their customer accounts. See "Administration Plan."
 
*** The Investment Adviser agreed that a portion of its advisory fee (0.10% on
    an annual basis) would not be imposed on the Fund and that it would reduce
    or limit certain "Other Expenses" of the Fund (excluding advisory fees,
    payments to Service Organizations, taxes, interest and brokerage and
    litigation, indemnification and other extraordinary expenses) to the extent
    such expenses exceeded 0.05% per annum of the Fund's average net assets.
    Had the reduction of the advisory fee and the expense limitation not been
    reflected in the above table, the management fees, other expenses and total
    operating expenses attributable to Administration Shares of the Fund would
    have
 
                                       5
<PAGE>
 
   been .0.50%, .0.09% and 0.84%, respectively. The foregoing table and example
   also reflect current operating expenses that will be applicable on an
   ongoing basis. See "Management--Investment Adviser."
 
  The purpose of the foregoing table is to assist investors in understanding
the various costs and expenses of the Fund that an investor in the Fund will
bear directly or indirectly. The costs and expenses included in the table and
hypothetical example above 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, the Fund's
actual performance will vary and may result in an actual return greater or less
than 5%. See "Management" and "Administration Plan."
 
                                       6
<PAGE>
 
                             FINANCIAL HIGHLIGHTS
         SELECTED DATA FOR A SHARE OUTSTANDING THROUGHOUT EACH PERIOD
 
  The following data with respect to Institutional Shares and Administration
Shares of the Fund outstanding during the periods indicated has been audited
by Arthur Andersen LLP, independent public accountants, as indicated in their
report incorporated by reference and attached to the Additional Statement from
the Fund's annual report to shareholders for the fiscal year ended October 31,
1994 (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
writing to any of the addresses on the cover of this Prospectus.
 
<TABLE>
<CAPTION>
                                                                              DISTRIBUTIONS TO
                           INCOME FROM INVESTMENT OPERATIONS                    SHAREHOLDERS
                           -------------------------------------   ----------------------------------------
                                                                               IN
                                           NET          TOTAL                EXCESS       FROM                  NET
                 NET ASSET   NET       REALIZED AND     INCOME     FROM NET  OF NET   NET REALIZED             ASSET
                 VALUE AT  INVEST-      UNREALIZED       FROM      INVEST-   INVEST-    GAIN ON      FROM    VALUE AT
                 BEGINNING  MENT       GAIN (LOSS)    INVESTMENT     MENT     MENT     INVESTMENT  PAID-IN      END      TOTAL
                 OF PERIOD INCOME     ON INVESTMENTS  OPERATIONS    INCOME   INCOME   TRANSACTIONS CAPITAL   OF PERIOD RETURN(B)
                 --------- -------    --------------  ----------   --------  -------  ------------ --------  --------- ---------
<S>              <C>       <C>        <C>             <C>          <C>       <C>      <C>          <C>       <C>       <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1994-
Institutional
shares..........  $10.14   $0.5628(f)    $(0.4592)(f)  $0.1036(f)  $(0.5598)     --     $(0.0438)       --     $9.64      0.99%
1994-
Administration
shares..........   10.14    0.5329(f)     (0.4539)(f)   0.0790(f)   (0.5352)     --      (0.0438)       --      9.64      0.73
1993-Institu-
tional shares...   10.16    0.5627        (0.0135)(a)   0.5492      (0.5627) (0.0065)        --         --     10.14      5.55
1993-
Administration
shares(d).......   10.23    0.2725        (0.0900)(a)   0.1825      (0.2725)     --          --         --     10.14      1.74
1992-Institu-
tional shares...   10.22    0.6703        (0.0600)(a)   0.6103      (0.6703)     --          --         --     10.16      6.24
1991-Institu-
tional shares...   10.00    0.8020         0.2200 (a)   1.0220      (0.8020)     --          --         --     10.22     10.93
1990-Institu-
tional shares...   10.07    0.8300        (0.0700)(a)   0.7600      (0.8300)     --          --         --     10.00      8.23
1989-Institu-
tional shares...   10.10    0.8800            --        0.8800      (0.8800)     --          --     (0.0300)   10.07      9.08
FOR THE PERIOD AUGUST 15, 1988 (COMMENCEMENT OF OPERATIONS) THROUGH OCTOBER 31,
- -------------------------------------------------------------------------------
1988-Institu-
tional Shares...   10.00    0.1800         0.1000       0.2800      (0.1800)     --          --         --     10.10      3.30
<CAPTION>
                                                                  RATIOS ASSUMING NO
                                                                  WAIVER OF FEES OR
                                                                  EXPENSE LIMITATION
                                                               ------------------------
                               RATIO OF                 NET
                                 NET                 ASSETS AT  RATIO OF   RATIO OF NET
                 RATIO OF NET INVESTMENT                END    EXPENSES TO  INVESTMENT
                 EXPENSES TO  INCOME TO  PORTFOLIO   OF PERIOD   AVERAGE    INCOME TO
                 AVERAGE NET   AVERAGE   TURNOVER       (IN        NET     AVERAGE NET
                    ASSETS    NET ASSETS  RATE(C)     000'S)     ASSETS       ASSETS
                 ------------ ---------- ----------- --------- ----------- ------------
<S>              <C>          <C>        <C>         <C>       <C>         <C>
FOR THE YEARS ENDED OCTOBER 31,
- -------------------------------
1994-
Institutional
shares..........     0.45%       5.69%    289.79%    $193,095     0.59%        5.55%
1994-
Administration
shares..........     0.70        5.38     289.79          730     0.84         5.24
1993-Institu-
tional shares...     0.45        5.46     411.66      359,708     0.64         5.31
1993-
Administration
shares(d).......     0.70(e)     4.84(e)  411.66       16,490     0.80(e)      4.74(e)
1992-Institu-
tional shares...     0.45        6.60     216.07      277,927     0.69         6.36
1991-Institu-
tional shares...     0.45        8.25     155.44      158,848     0.79         7.91
1990-Institu-
tional shares...     0.45        8.62     173.21       68,995     0.95         8.12
1989-Institu-
tional shares...     0.46        8.71     137.37       31,015     1.39         7.78
FOR THE PERIOD AUGUST 15, 1988 (COMMENCEMENT OF OPERATIONS) THROUGH OCTOBER 31,
- -------------------------------------------------------------------------------
1988-Institu-
tional Shares...     0.55(e)     8.55(e)  167.00(e)    39,052     1.42(e)      7.68(e)
</TABLE>
- ----
(a)  Includes balancing effect of calculating per share amounts.
(b) Assumes investment at the net asset value at the beginning of the period,
    reinvestment of all dividends and distributions and a complete redemption
    of the investment at the net asset value at the end of the period.
(c) Includes effect of mortgage dollar roll transactions.
(d) Administration share activity commenced on April 15, 1993.
(e) Annualized.
(f) Calculated based on the average shares outstanding methodology.
 
                                       7
<PAGE>
 
                       INVESTMENT OBJECTIVE AND POLICIES
 
  The Fund seeks to achieve a high level of current income. Secondarily, the
Fund may, in seeking current income, also consider the potential for capital
gain. There can be no assurance that the objective of the Fund will be
realized.
 
  SELECTION OF PORTFOLIO INVESTMENTS. The Fund invests exclusively in (a)
securities issued or guaranteed as to principal and interest by the U.S.
Government, its agencies or instrumentalities ("U.S. Government securities")
deemed to have remaining maturities or (in the case of mortgage-related
securities) estimated average lives of six years or less and (b) repurchase
agreements collateralized by U.S. Government Securities. Under normal market
conditions, the Fund will invest at least 65% of its total assets in securities
issued by U.S. Government agencies or instrumentalities and in repurchase
agreements pertaining to U.S. Government securities. Under normal
circumstances, substantially all of the Fund's assets will be invested in
securities issued or guaranteed by the U.S. Government, its agencies or
instrumentalities. The Fund may, for temporary defensive purposes, hold or
invest more than 35% of its total assets in cash, U.S. Treasury securities or
high quality money market instruments, including commercial paper, bankers'
acceptances, repurchase agreements or other debt obligations with a remaining
maturity of one year or less.
 
  PORTFOLIO DURATION. The Fund will maintain an option-adjusted duration of not
more than 3 years, however, its actual option-adjusted duration is expected to
be approximately 2 years under normal interest rate conditions. The Fund's
duration is a measure of the price sensitivity of the portfolio, including
expected cash flow and mortgage prepayments under a wide range of interest rate
scenarios. Maturity measures only the time until final payment is due on a bond
or other debt security; it takes no account of the pattern of a security's cash
flows over time, including how cash flow is affected by prepayments and by
changes in interest rates. In computing the duration of its portfolio, the Fund
will have to 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. The Fund may use various
techniques to shorten or lengthen the option-adjusted duration of its
portfolio, including the acquisition of debt obligations at a premium or
discount, mortgage and interest rate swaps and interest rate floors, caps and
collars.
 
  OTHER INVESTMENT POLICIES. The Fund may also employ certain active management
techniques to hedge the interest rate risks associated with the Fund's
portfolio securities, to enhance its return and to seek to reduce fluctuation
in its net asset value. These techniques include, but are not limited to,
mortgage and interest rate swaps and interest rate floors, caps and collars.
The Fund may also employ other investment techniques to enhance returns, such
as loans of portfolio securities, mortgage dollar rolls, forward commitments
and repurchase agreements.
 
  When interest rates decline, the value of a portfolio invested in fixed-rate
debt securities can be expected to rise. Conversely, when interest rates rise,
the value of a portfolio invested in fixed-rate debt securities can be expected
to decline. In contrast, since interest rates on adjustable-rate mortgage loans
are reset periodically, yields of portfolio securities representing interests
in such loans will gradually align themselves to reflect changes in market
interest rates, causing the value of such adjustable-rate securities to
fluctuate less dramatically in response to interest rate fluctuations than
would fixed-rate debt securities. The Investment Adviser expects the Fund's net
asset value to be relatively stable during normal market conditions. This is
because the Fund will maintain a maximum option-adjusted duration of not more
than 3 years and will utilize certain interest rate hedging techniques.
However, a sudden and extreme increase
 
                                       8
<PAGE>
 
in prevailing interest rates may cause a decline in the Fund's net asset value.
Conversely, a sudden and extreme decline in interest rates could result in an
increase in the Fund's net asset value.
 
  The Fund's investment objective of seeking to achieve a high level of current
income and the policies specified under "Investment Restrictions" may only be
changed with the approval of the holders of a majority of the outstanding
shares of the Fund. All other policies described herein may be changed by a
vote of the Trustees. There can be no assurance that the Fund will be
successful in achieving its investment objective. An investment in shares of
the Fund does not constitute a complete investment program. Investors may wish
to complement an investment in the Fund with other types of investments.
 
                               INVESTMENT ADVISER
 
  The Fund's investment adviser is Goldman Sachs Funds Management, L.P., an
affiliate of Goldman Sachs. The management services provided by the Investment
Adviser are subject to the general supervision of the Trust's Board of
Trustees. The Investment Adviser and its affiliates serve a wide range of
clients including private and public pension funds, endowments, foundations,
banks, thrifts, insurance companies, corporations, and private investors and
family groups.
 
  Founded in 1869, Goldman Sachs is among the oldest and largest investment
banking firms in the United States. Goldman Sachs is a leader in virtually
every field of investing and financing, participating in financial markets
worldwide and serving individuals, institutions, corporations and governments.
Goldman Sachs is headquartered in New York and has offices throughout the
United States and in Beijing, Frankfurt, George Town, Hong Kong, London,
Madrid, Milan, Montreal, Osaka, Paris, Seoul, Shanghai, Singapore, Sydney,
Taipei, Tokyo, Toronto, Vancouver and Zurich.
 
  The Investment Adviser is able to draw on the research and market expertise
of Goldman Sachs, whose investment research effort is one of the largest in the
industry. The in-depth information and analyses generated by Goldman Sachs's
research analysts, economists and portfolio strategists are available to the
Investment Adviser.
 
                           SPECIAL INVESTMENT METHODS
 
U.S. GOVERNMENT SECURITIES
 
  U.S. Government securities include several different kinds of obligations.
Such securities include a variety of United States Treasury obligations,
including bills and notes, which principally differ only in their interest
rates, maturities and times of issuance, and obligations issued or guaranteed
by United States Government agencies or instrumentalities which are supported
by (a) the full faith and credit of the United States Treasury (such as
securities of the Government National Mortgage Association ("Ginnie Mae")), (b)
the authority of the United States Government to purchase certain obligations
of the issuer (such as securities of the Federal National Mortgage Association
("Fannie Mae") and the Federal Home Loan Mortgage Corporation ("Freddie Mac")),
(c) the limited authority of the issuer to borrow from the United States
Treasury (such as securities of the Student Loan Marketing Association) or (d)
only the credit of the issuer. No assurance can be given that the United States
Government will provide financial support to United States Government agencies
or instrumentalities described in clauses (b), (c) or (d) above in the future,
other than as set forth above, since it is not obligated to do so by law. U.S.
Government securities also include securities related to pools of mortgages as
discussed below.
 
                                       9
<PAGE>
 
CHARACTERISTICS OF MORTGAGE-BACKED SECURITIES
 
  Mortgage-Backed Securities are securities that directly or indirectly
represent participations in, or are collateralized by and payable from,
mortgage loans secured by real property. The investment characteristics of
adjustable and fixed rate Mortgage-Backed Securities differ from those of
traditional fixed income securities. The major differences include the payment
of interest and principal on Mortgage-Backed Securities on a more frequent
(usually monthly) schedule, and the possibility that principal may be prepaid
at any time due to prepayments on the underlying mortgage loans or other
assets. These differences can result in significantly greater price and yield
volatility than is the case with traditional fixed income securities. As a
result, if the Fund purchases Mortgage-Backed Securities at a premium, a faster
than expected prepayment rate will reduce both the market value and the yield
to maturity from those which were anticipated. A prepayment rate that is slower
than expected will have the opposite effect of increasing yield to maturity and
market value. Conversely, if the Fund purchases Mortgage-Backed Securities at a
discount, faster than expected prepayments will increase, while slower than
expected prepayments will reduce, yield to maturity and market value. The
Investment Adviser will seek to manage these potential risks and benefits by
investing in a variety of Mortgage-Backed Securities and by using certain
hedging techniques. See "Other Investments and Practices."
 
  Prepayments on a pool of mortgage loans are influenced by a variety of
factors, including economic conditions, changes in mortgagors' housing needs,
job transfers, unemployment, mortgagors' net equity in the mortgaged properties
and servicing decisions. The timing and level of prepayments cannot be
predicted. Generally, however, prepayments on adjustable rate mortgage loans
and fixed rate mortgage loans will increase during a period of falling mortgage
interest rates and decrease during a period of rising mortgage interest rates.
Accordingly, the amounts of prepayments available for reinvestment by the Fund
are likely to be greater during a period of declining mortgage interest rates.
If general interest rates also decline, such prepayments are likely to be
reinvested at lower interest rates than the Fund was earning on the Mortgage-
Backed Securities that were prepaid.
 
  GUARANTEED MORTGAGE-BACKED SECURITIES IN WHICH THE FUND INVESTS. All of the
Fund's investments in Mortgage-Backed Securities will be issued or guaranteed
by the U.S. Government or one of its agencies or instrumentalities, including
but not limited to, Ginnie Mae, Fannie Mae and Freddie Mac. Ginnie Mae
securities are backed by the full faith and credit of the U.S. Government,
which means that the U.S. Government guarantees that the interest and principal
will be paid when due. Fannie Mae securities and Freddie Mac securities are not
backed by the full faith and credit of the U.S. Government; however, the
ability of these agencies to borrow from the U.S. Treasury makes their
securities high quality securities with minimal credit risks. There are several
types of guaranteed Mortgage-Backed Securities currently available, including
guaranteed mortgage pass-through certificates and multiple-class securities,
which include guaranteed Real Estate Mortgage Investment Conduit ("REMIC")
pass-through certificates and stripped Mortgage Backed-Securities. The Fund
will be permitted to invest in other types of Mortgage-Backed Securities that
may be available in the future to the extent investment in such securities is
consistent with its investment objective and policies.
 
  MULTIPLE CLASS PASS-THROUGH SECURITIES AND COLLATERALIZED MORTGAGE
OBLIGATIONS. The Fund may invest in multiple class securities issued by U.S.
Government agencies and instrumentalities such as Fannie Mae or Freddie Mac,
including guaranteed collateralized mortgage obligations ("CMOs") and REMIC
pass-through or participation certificates. 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.
 
                                       10
<PAGE>
 
  CMOs and guaranteed REMIC pass-through certificates ("REMIC Certificates")
issued by Fannie Mae and Freddie Mac are types of multiple class pass-through
securities. Investors may purchase beneficial interests in REMICs, which are
known as "regular" interests or "residual" interests. The Fund does not intend
to purchase residual interests in CMOs or REMICs. The REMIC Certificates
represent beneficial ownership interests in a REMIC trust, generally consisting
of mortgage loans or Fannie Mae, Freddie Mac or Ginnie Mae guaranteed mortgage
pass-through certificates (the "Mortgage Assets"). The obligations of Fannie
Mae or Freddie Mac under their respective guaranty of the REMIC Certificates
are obligations solely of Fannie Mae or Freddie Mac, respectively.
 
  Fannie Mae REMIC Certificates are issued and guaranteed as to timely
distribution of principal and interest by Fannie Mae. In addition, Fannie Mae
will be obligated to distribute the principal balance of each class of REMIC
Certificates in full, whether or not sufficient funds are otherwise available.
 
  For Freddie Mac REMIC Certificates, Freddie Mac guarantees the timely payment
of interest, and also guarantees the payment of principal as payments are
required to be made on the underlying mortgage participation certificates
("PCs"). PCs represent undivided interests in specified level payment,
residential mortgages or participations therein purchased by Freddie Mac and
placed in a PC pool. With respect to principal payments on PCs, Freddie Mac
generally guarantees ultimate collection of all principal of the related
mortgage loans without offset or deduction. Freddie Mac also guarantees timely
payment of principal on certain PCs.
 
  CMOs and REMIC Certificates are issued in multiple classes. Each class of
CMOs and REMIC Certificates, often referred to as a "tranche," is issued at a
specific adjustable or fixed interest rate and must be fully retired no later
than its final scheduled distribution date. Principal prepayments on the
underlying mortgage loans or the Mortgage Assets underlying the CMOs or REMIC
Certificates may cause some or all of the classes of CMOs or REMIC Certificates
to be retired substantially earlier than their final distribution dates.
Generally, interest is paid or accrues on all classes of CMOs or REMIC
Certificates on a monthly basis.
 
  The principal of and interest on the Mortgage Assets may be allocated among
the several classes of CMOs or REMIC Certificates in various ways. In certain
structures (known as "sequential pay" CMOs or REMIC Certificates), payments of
principal, including any principal prepayments, on the Mortgage Assets
generally are applied to the classes of CMOs or REMIC Certificates in the order
of their respective final distribution dates. Thus, no payment of principal
will be made on any class of sequential pay CMOs or REMIC Certificates until
all other classes having an earlier final distribution date have been paid in
full.
 
  Additional structures of CMOs and REMIC Certificates include, among others,
"parallel pay" CMOs and REMIC Certificates. Parallel pay CMOs or REMIC
Certificates are those which are structured to apply principal payments and
prepayments of the Mortgage Assets to two or more classes concurrently on a
proportionate or disproportionate basis. These simultaneous payments are taken
into account in calculating the final distribution date of each class.
 
  A wide variety of REMIC Certificates may be issued in the parallel pay or
sequential pay structures. These securities include accrual certificates (also
known as "Z-Bonds"), which only accrue interest at a specified rate until all
other certificates having an earlier final distribution date have been retired
and are converted thereafter to an interest-paying security, and planned
amortization class ("PAC") certificates, which are parallel pay REMIC
Certificates which generally require that specified amounts of principal be
 
                                       11
<PAGE>
 
applied on each payment date to one or more classes of REMIC Certificates (the
"PAC Certificates"), even though all other principal payments and prepayments
of the Mortgage Assets are then required to be applied to one or more other
classes of the Certificates. The scheduled principal payments for the PAC
Certificates generally have the highest priority on each payment date after
interest due has been paid to all classes entitled to receive interest
currently. Shortfalls, if any, are added to the amount payable on the next
payment date. The PAC Certificate payment schedule is taken into account in
calculating the final distribution date of each class of PAC. In order to
create PAC tranches, one or more tranches generally must be created that absorb
most of the volatility in the underlying mortgage assets. These tranches tend
to have market prices and yields that are much more volatile than the PAC
classes.
 
  STRIPPED MORTGAGE-BACKED SECURITIES. The Fund may invest in stripped
mortgage-backed securities ("SMBS"), which are derivative multiple class
mortgage-backed securities. The Fund may only invest in SMBS issued or
guaranteed by the U.S. Government, its agencies or instrumentalities.
 
  SMBS are usually structured with two classes that receive different
proportions of the interest and principal distributions from a pool of Mortgage
Assets. A common type of SMBS will have one class receiving all of the interest
from the Mortgage Assets, while the other class will receive all of the
principal. However, in some instances, one class will receive some of the
interest and most of the principal while the other class will receive most of
the interest and the remainder of the principal. If the underlying Mortgage
Assets experience greater than anticipated prepayments of principal, the Fund
may fail to fully recoup its initial investment in these securities. Although
the market for such securities is increasingly liquid, certain SMBS may not be
readily marketable and will be considered illiquid for purposes of the Fund's
limitation on investments in illiquid 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 Assets 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 Investment Adviser will seek
to manage these risks (and potential benefits) by investing in a variety of
such securities and by using certain hedging techniques. See "Other Investments
and Practices."
 
ZERO COUPON BONDS
 
  The Fund may invest in zero coupon securities, zero coupon U.S. Treasury
securities (which are Treasury notes and bonds that have been stripped of their
unmatured interest coupons), the coupons themselves and receipts or
certificates representing interests in such stripped debt obligations. 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 market
prices of securities that pay interest periodically and are likely to respond
to a greater degree to changes in interest rates than interest bearing
securities having similar maturities and credit qualities. The Fund's
investments in zero coupon securities or other stripped securities 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.
 
                                       12
<PAGE>
 
                YIELD, MARKET VALUE AND RISK CONSIDERATIONS OF 
                          MORTGAGE-BACKED SECURITIES
 
  The Fund may invest in certain Mortgage-Backed Securities, such as interest-
only and principal-only SMBS, that are extremely sensitive to changes in
prepayments and interest rates. Even though such securities have been issued or
guaranteed by an agency or instrumentality of the U.S. Government, under
certain interest rate or prepayment rate scenarios, the Fund may fail to fully
recover its investment in such securities.
 
  The investment characteristics of Mortgage-Backed Securities differ from
those of traditional fixed income securities. The major differences typically
include more frequent interest and principal payments, usually monthly, and the
possibility that unscheduled prepayments of principal may be made at any time.
Prepayment rates are influenced by changes in current interest rates and a
variety of economic, geographic, social and other factors and cannot be
predicted with certainty. Adjustable rate mortgage loans may be subject to a
greater prepayment rate in a declining interest rate environment. The yields to
maturity of the Mortgage-Backed Securities in which the Fund may invest will be
affected by the actual rate of payment (including prepayments) of principal of
the underlying mortgage loans. The mortgage loans underlying such securities
generally may be prepaid at any time without penalty. In a fluctuating interest
rate environment, a predominant factor affecting the prepayment rate on a pool
of mortgage loans is the difference between the interest rates on the mortgage
loans and prevailing mortgage loan interest rates (giving consideration to the
cost of any refinancing). In general, if interest rates on new mortgage loans
fall sufficiently below the interest rates on existing fixed rate mortgage
loans underlying mortgage pass-through securities, the rate of prepayment would
be expected to increase. Conversely, if mortgage loan interest rates rise above
the interest rates on the fixed rate mortgage loans underlying the mortgage
pass-through securities, the rate of prepayment may be expected to decrease.
 
  The rate of principal prepayments with respect to adjustable rate mortgages
has fluctuated in recent years. As is the case with fixed rate mortgage loans,
adjustable rate mortgages may be subject to a greater rate of principal
prepayments in a declining interest rate environment. For example, if
prevailing interest rates fall significantly, mortgages could be subject to
higher prepayment rates than if prevailing interest rates remain constant
because the availability of fixed rate mortgage loans at competitive interest
rates may encourage mortgagors to refinance their mortgages to "lock-in" a
lower fixed interest rate. Conversely, if prevailing interest rates rise
significantly, adjustable rate mortgages may prepay at lower rates than if
prevailing rates remain at or below those in effect at the time such mortgages
were originated due, for example, to the unavailability of lower rate
alternatives. There can be no certainty as to the rate of prepayments on the
mortgages in either stable or changing interest rate environments. In addition,
there can be no certainty as to whether increases in the principal balances of
adjustable rate mortgages due to the addition of deferred interest may result
in a default rate higher than that on mortgages that do not provide for
negative amortization. Other factors affecting prepayment of mortgages include
changes in mortgagors' housing needs, job transfers, unemployment, mortgagors'
net equity in the mortgage properties and servicing decisions.
 
  The Fund's reinvestment of principal payments and prepayments received on a
mortgage pass-through security may be made at rates higher or lower than the
rate payable on such security, thus affecting the return realized by the Fund.
In addition, the receipt of interest payments monthly rather than semi-annually
by the Fund has a compounding effect that may increase the yield to the Fund
relative to debt obligations that pay interest semi-annually. Due to these
factors, Mortgage-Backed Securities may also be less effective than U.S.
Treasury securities of similar maturity at maintaining yields during periods
 
                                       13
<PAGE>
 
of changing interest rates. Prepayments may have a disproportionate effect on
certain Mortgage-Backed Securities such as SMBS and certain other multiple
class pass-through securities. The Fund may purchase Mortgage-Backed Securities
at a premium or at a discount.
 
  RISKS ASSOCIATED WITH DERIVATIVE MORTGAGE-BACKED SECURITIES. Derivative
Mortgage-Backed Securities are subject to different combinations of interest
rate and/or prepayment risks. 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. The Investment Adviser may use
derivative Mortgage-Backed Securities and other derivative securities
consistent with the Fund's investment objective for a variety of purposes
including adjusting the average duration or interest rate sensitivity of the
Fund's portfolio or attempting to enhance the Fund's total return. The
Investment Adviser manages the risks and benefits of derivative Mortgage-Backed
Securities and other derivative securities by prudent analysis, selection and
monitoring of such securities included in the Fund's portfolio.
 
  The risk of faster than anticipated prepayments generally adversely affects
interest-only securities (IOs), super floaters and premium priced Mortgage-
Backed Securities. The risk of slower than anticipated prepayments generally
adversely affects principal-only securities (POs), floating rate securities
subject to interest rate caps, support tranches and discount priced Mortgage-
Backed Securities.
 
  RISKS ASSOCIATED WITH OTHER DERIVATIVE FLOATING RATE SECURITIES. Other types
of floating rate derivative securities present more complex types of interest
rate risks. For example, range floaters are subject to the risk that the coupon
will be reduced to 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.
 
                        OTHER INVESTMENTS AND PRACTICES
 
  INVERSE FLOATING RATE SECURITIES. The Fund may invest in leveraged inverse
floating rate debt instruments ("inverse floaters"). The interest rate on an
inverse floater resets in the opposite direction from the market rate of
interest to which the inverse floater is indexed. An inverse floater may be
considered to be leveraged to the extent that its interest rate varies by a
magnitude that exceeds the magnitude of the change in the index rate of
interest. The higher degree of leverage inherent in inverse floaters is
associated with the greater volatility in their market values. Accordingly, the
duration of an inverse floater may exceed its stated final maturity. Certain
inverse floaters may be deemed to be illiquid securities for purposes of the
Fund's 15% limitation on investments in such securities.
 
  INTEREST RATE SWAPS, MORTGAGE SWAPS, CAPS, FLOORS AND COLLARS. The Fund may
enter into interest rate swaps and mortgage swaps for hedging purposes and to
increase total return. The Fund may also enter into other types of interest
rate swap arrangements such as caps, floors and collars. Interest rate swaps
involve the exchange by the Fund with another party of their respective
commitments to pay or receive interest, e.g., an exchange of floating rate
payments for fixed rate payments. Mortgage swaps are similar to interest rate
swaps in that they represent commitments to pay and receive interest. The
notional principal amount, however, is tied to a reference pool or pools of
mortgages. The purchase of an interest rate cap entitles the purchaser, to the
extent that a specified index exceeds a predetermined interest rate, to receive
payment of interest on a notional principal amount from the party selling such
interest rate cap. The purchase of an interest rate floor entitles the
purchaser, to the extent that a specified index falls below a predetermined
interest rate, to receive payment of interest on a notional principal
 
                                       14
<PAGE>
 
amount from the party selling such interest rate floor. An interest rate collar
is the combination of a cap and a floor that preserves a certain return within
a predetermined range of interest rates. Since interest rate swaps, mortgage
swaps, caps, floors and collars are individually negotiated, the Fund expects
to achieve an acceptable degree of correlation between its portfolio
investments and its swap, cap, floor and collar positions entered into for
hedging purposes.
 
  The Fund will enter into interest rate swaps and mortgage swaps only on a net
basis, which means that the two payment streams are netted out, with the Fund
receiving or paying, as the case may be, only the net amount of the two
payments. Interest rate swaps and mortgage swaps do not involve the delivery of
securities, other underlying assets or principal. Accordingly, the risk of loss
with respect to interest rate swaps and mortgage swaps is limited to the net
amount of payments that the Fund is contractually obligated to make. If the
other party to an interest rate swap or mortgage swap defaults, the Fund's risk
of loss consists of the net amount of payments that the Fund is contractually
entitled to receive, if any. To the extent the net amount of an interest rate
swap or mortgage swap is held in a segregated account, consisting of cash and
liquid, high grade debt securities, the Fund and the Investment Adviser believe
that swaps do not constitute senior securities under the Investment Company Act
of 1940, as amended (the "Act") and, accordingly, will not treat them as being
subject to the Fund's borrowing restriction.
 
  The Fund will not enter into any interest rate swap, mortgage swap, or
interest rate cap, floor or collar transactions unless the unsecured commercial
paper, senior debt or claims paying ability of the other party is rated either
AA or A-1 or better by Standard & Poor's Ratings Group ("S&P") or Aa or P-1 or
better by 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 use of interest rate and mortgage swaps as well as interest rate caps,
floors and collars, 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 market values and interest rates, the investment performance of
the Fund would be less favorable than it would have been if these investment
techniques were not used. The staff of the SEC considers interest rate swaps
and mortgage swaps, as well as interest rate floors and collars, to be illiquid
securities for purposes of the Fund's 15% limitation on illiquid investments.
 
  LENDING OF PORTFOLIO SECURITIES. The 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 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 the Fund. See "Investment Restrictions" in the
Additional Statement. The 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.
 
  WHEN-ISSUED AND FORWARD COMMITMENT SECURITIES. The Fund may purchase
securities on a when-issued basis. When-issued transactions arise when
securities are purchased by the 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. The Fund
may also purchase securities on a forward commitment basis. In a forward
commitment transaction, the Fund
 
                                       15
<PAGE>
 
contracts to purchase securities for a fixed price at a future date beyond
customary settlement time. The Fund is required to hold and maintain in a
segregated account until the settlement date cash or liquid, high grade debt
obligations in an amount sufficient to meet the purchase price. Alternatively,
the Fund may enter into offsetting contracts for the forward sale of other
securities that it owns. 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. Although the Fund would
generally purchase securities on a when-issued or forward commitment basis with
the intention of actually acquiring securities for its portfolio, the Fund may
dispose of a when-issued security or forward commitment prior to settlement if
the Investment Adviser deems it appropriate to do so.
 
  MORTGAGE DOLLAR ROLLS. The 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 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 (often referred to as the
"drop") or fee income plus the interest earned on the cash proceeds of the
securities sold until the settlement date of 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 compared with what such performance would
have been without the use of mortgage dollar rolls. All cash proceeds will be
invested in instruments that are permissible investments for the Fund. The Fund
will hold and maintain in a segregated account until the settlement date cash
or liquid, high grade debt securities in an amount equal to the forward
purchase price.
 
  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.
 
  Mortgage dollar rolls involve certain risks including the following: if the
broker-dealer to whom the Fund sells the security becomes insolvent, the Fund's
right to purchase or repurchase the mortgage-related securities subject to the
mortgage dollar roll may be restricted and the instrument which the Fund is
required to repurchase may be worth less than an instrument which the Fund
originally held. Successful use of mortgage dollar rolls will depend upon the
Investment Adviser's ability to manage its interest rate and mortgage
prepayments exposure. For these reasons, there is no assurance that mortgage
dollar rolls can be successfully employed.
 
  REPURCHASE AGREEMENTS. The 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. In a repurchase agreement, the Fund
purchases a debt security from a seller which undertakes to repurchase the
security at a specified resale price on an agreed future date (ordinarily a
week or less). The resale price generally exceeds the purchase price by an
amount which reflects an agreed-upon market interest rate for the term of the
repurchase agreement. The primary risk is that, if the seller defaults, the
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. Repurchase
agreements maturing in more than seven days are considered by the Fund to be
illiquid. In
 
                                       16
<PAGE>
 
addition, the Fund, together with other registered investment companies having
advisory agreements with the Investment Adviser or any of 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.
 
  ILLIQUID SECURITIES. The Fund will not invest more than 15% of its net assets
in securities which are illiquid, including securities that are not readily
marketable, repurchase agreements maturing in more than seven days, interest
rate and mortgage swaps, interest rate caps, floors and collars, certain SMBS
and securities that are restricted as to resale. However, a restricted security
is not considered to be illiquid if the Trustees of the Trust determine, based
upon the Investment Adviser's continuing review of the trading markets for the
specific restricted security, under guidelines adopted by the Trustees of the
Trust and subject to the Trustees' oversight and ultimate responsibility, that
such restricted security eligible for resale under Rule 144A under the
Securities Act of 1933 is liquid. In addition, a repurchase agreement which by
its terms can be liquidated before its nominal fixed term on seven days or less
notice is regarded as a liquid instrument. Subject to the 15% limitation on
illiquid securities investments, the Fund may acquire U.S. Government
securities in a private placement.
 
  Since it is not possible to predict with assurance exactly how this market
for restricted securities sold and offered under Rule 144A will develop, the
Board of Trustees will carefully monitor the Fund's investments in these
securities, focusing on such important factors, among others, as valuation,
credit quality, liquidity and availability of information. This investment
practice could have the effect of increasing the level of illiquidity in the
Fund to the extent that qualified institutional buyers become for a time
uninterested in purchasing these restricted securities.
 
  OTHER INVESTMENT COMPANIES. The Fund reserves the right to invest up to 10%
of its total assets, calculated at the time of purchase, in the securities of
other investment companies, including business development companies and small
business investment companies. The Fund may not invest more than 5% of its
total assets in the securities of any one investment company or acquire more
than 3% of the voting securities of any other investment company. Pursuant to
an exemptive order obtained from the SEC, other investment companies in which
the Fund may invest include money market funds for which the Investment Adviser
or any of its affiliates serves as investment adviser. The Fund will indirectly
bear its proportionate share of any management fees and other expenses paid by
investment companies in which it invests in addition to the advisory fees paid
by the Fund. However, to the extent that the Fund invests in a money market
fund for which the Investment Adviser or any of its affiliates acts as adviser,
the advisory fees payable by the Fund to the Investment Adviser will be reduced
by an amount equal to the Fund's proportionate share of the advisory fees paid
by such money market fund to the Investment Adviser or any of its affiliates.
 
  INSTRUMENT MATURITY. The Mortgage-Backed Securities in which the Fund invests
will have an estimated average life, as determined by the Investment Adviser,
of six years or less. Average life estimates are based upon anticipated
prepayment patterns which, in turn, are based upon past prepayment patterns,
prevailing interest rates and other factors. Due to actual prepayment
experience, however, the remaining estimated average life of an investment
after purchase by the Fund may increase to more than six years or may decrease
at a rate faster than anticipated. The Fund's other securities generally will
have remaining maturities of 6 years or less and repurchase agreements will
have remaining maturities of less than one year.
 
                                       17
<PAGE>
 
  The Fund may purchase securities with variable or floating interest rates. In
calculating average portfolio duration or maturity, such securities will
generally be treated as having a maturity equal to the time remaining until
their interest rate is next reset, unless the Investment Adviser believes some
other treatment to be more appropriate, for example, because of the market
price impact of interest rate caps, floors and collars. In addition, the Fund
also may purchase securities that have demand or put features. In calculating
average portfolio duration or maturity, these securities generally will be
treated as having a maturity equal to the period remaining until the Fund can
obtain the principal amount through exercise of such feature.
 
  OTHER INFORMATION. The Investment Adviser seeks to enhance the Fund's income
by taking advantage of yield disparities or other factors (such as anticipated
changes in relative value which have not yet occurred) that occur or are
expected to occur in the securities markets. The Fund may dispose of any
security prior to its maturity if such disposition and reinvestment of the
proceeds are expected to enhance income consistent with the Investment
Adviser's judgment as to a desirable maturity structure or if such disposition
is believed to be advisable due to other circumstances or considerations.
 
                            INVESTMENT RESTRICTIONS
 
  The Fund is subject to certain investment restrictions which, as described in
more detail in the Additional Statement, are fundamental policies that cannot
be changed without the approval of a majority of the outstanding shares of the
Fund. Among other restrictions, as a diversified Fund, the Fund may not, with
respect to 75% of its total assets, purchase the securities of any one issuer
(except U.S. Government securities) if more than 5% of the value of the Fund's
assets would be invested in such issuer. The Fund has the authority to borrow
money but only (a) as a temporary measure, and then only in amounts not
exceeding 5% of the value of the Fund's net assets (excluding any amount
borrowed) or (b) from banks, provided that immediately after any such borrowing
all borrowings of the Fund do not exceed one-third of the Fund's net assets
(excluding any amount borrowed). The Fund does not intend to borrow for
investment leverage purposes but solely for extraordinary or emergency purposes
or to facilitate management of the Fund by enabling it to meet redemption
requests when the liquidation of portfolio instruments is deemed to be
disadvantageous or not possible. The Fund may not purchase securities while
such borrowings exceed 5% of the value of the Fund's total assets.
 
                               PORTFOLIO TURNOVER
 
  It is anticipated that the portfolio turnover rate of the Fund will vary from
year to year. The portfolio turnover rate is computed by dividing the lesser of
the 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 the 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
the Fund consistent with the Fund's investment objective and portfolio
management policies. A higher rate of portfolio turnover results in increased
transaction costs to the Fund. The portfolio turnover rate includes the effect
of entering into mortgage dollar rolls.
 
                                       18
<PAGE>
 
                                   MANAGEMENT
 
TRUSTEES AND OFFICERS
 
  The Trust's Board of Trustees is 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 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 ADVISER
 
  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,
acts as the investment adviser of the Fund. Goldman Sachs Funds Management,
L.P. was registered as an investment adviser in 1990. As of January 31, 1995,
the Investment Adviser, together with its affiliates, acted as investment
adviser, administrator or distributor for approximately $48.7 billion in
assets.
 
  Under its Investment Advisory Agreement with the Fund, Goldman Sachs Funds
Management, L.P., subject to the general supervision of the Board of Trustees,
manages the Fund's portfolio and provides for the administration of all of the
Fund's other affairs. It is the responsibility of the Investment Adviser to
make investment decisions for the Fund and to place purchase and sale orders
for the Fund's portfolio transactions. 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. Goldman Sachs has agreed to permit the Fund to
use the name "Goldman Sachs" or a derivative thereof as part of the Fund's name
for as long as the Investment Advisory Agreement is in effect.
 
  The Fund's portfolio managers are Jonathan A. Beinner and Theodore T. Sotir.
Mr. Beinner specializes in investing in a particular type of security the Fund
may hold. Mr. Sotir helps with overall portfolio strategy and is a member of
the Investment Adviser's risk control team. Mr. Beinner joined the Investment
Adviser in 1990 and is currently a Vice President, after working in the trading
and arbitrage group of Franklin Savings Association. Mr. Sotir joined the
Investment Adviser in 1993 and is currently a Vice President, after working as
a portfolio manager at Fidelity Management Trust Company. Prior to joining
Fidelity, Mr. Sotir worked for Goldman Sachs in the mortgage securities
department for six years.
 
  As compensation for the services rendered to the Fund by the Investment
Adviser pursuant to the Investment Advisory Agreement, and the assumption by
the Investment Adviser of the expenses related thereto, the Fund pays the
Investment Adviser a fee, computed daily and payable monthly, at an annual rate
equal to 0.50% of the Fund's average daily net assets. For the fiscal year
ended October 31, 1994, the Fund paid an advisory fee to the Investment Adviser
at the annual rate of 0.40% of the Fund's average daily net assets.
 
  The Investment Adviser has voluntarily agreed not to impose a portion of its
advisory fee (equal to 0.10% of the Fund's average daily net assets) and to
reduce or otherwise limit certain expenses of the Fund (excluding advisory
fees, payments to Service Organizations (as defined below), taxes, interest and
brokerage and litigation, indemnification and other extraordinary expenses) to
the extent such expenses exceed 0.05% annually of the Fund's average net
assets. Such reductions or limits, if any, are calculated monthly on a
cumulative basis and may be discontinued or modified by the Investment Adviser
at its
 
                                       19
<PAGE>
 
discretion at any time. The Investment Adviser has also agreed to reduce its
fees payable (to the extent of such fees) by the amount the Fund's expenses
would, absent the fee reduction, exceed the applicable expense limitations
imposed by state securities administrators. See "Management--Expenses" in the
Additional Statement.
 
  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 the Fund or limit its 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 Fund and/or which engage in
and compete for transactions in the same types of securities and instruments as
the Fund. 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 Fund and it is not anticipated that the
Investment Adviser will have access to proprietary information for the purpose
of managing the Fund. The results of the Fund's investment activities,
therefore, may differ from those of Goldman Sachs and its affiliates and it is
possible that the 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. From time to time, the 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 "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, serves as the exclusive
distributor of the Fund's shares. Goldman Sachs, 4900 Sears Tower, Chicago,
Illinois, also serves as the Fund's transfer agent (the "Transfer Agent").
Shareholders of record with inquiries regarding the Fund should contact Goldman
Sachs (as Transfer Agent) at the address or the telephone number set forth on
the cover page of this Prospectus.
 
                                   DIVIDENDS
 
  The Fund intends that all or substantially all of its net investment income
will be declared as a dividend on each day to shareholders of record as of 3:00
p.m. Chicago time on that day. Over the course of the fiscal year, dividends
accrued and paid will constitute all or substantially all of the Fund's net
investment income. From time to time a portion of such dividends may constitute
a return of capital. The Fund also intends that all net realized long-term and
short-term 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.
 
  The 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 the Fund's net asset value as of 3:00 p.m. Chicago
time. On days on which net asset value is not calculated, such determination is
made as of 3:00 p.m. Chicago time.
 
                                       20
<PAGE>
 
  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 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 the Fund a portion of the
net asset value per share may be represented by undistributed income of the
Fund or unrealized appreciation of the Fund's portfolio securities. Therefore,
subsequent distributions (or portions thereof) on such shares 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.
 
                                NET ASSET VALUE
 
  The net asset value per share is calculated by the Fund's custodian as of the
close of regular trading on the New York Stock Exchange (normally 3:00 p.m.
Chicago time, 4:00 p.m. New York time), immediately after determination of the
income to be declared as a dividend on each Business Day (as such term is
defined under "Additional Information"). Net asset value per share of each
class is calculated by determining the net assets attributable to each class
and dividing by the number of outstanding shares of that class.
 
  Investments in U.S. Government Securities, including Mortgage-Backed
Securities, and other debt obligations are valued at fair value, based on yield
equivalents, a pricing matrix or other sources, under valuation procedures
established by the Trust's Board of Trustees. Other portfolio securities for
which accurate market quotations are readily available are valued on the basis
of quotations furnished by pricing services or provided by dealers in such
securities. Portfolio securities for which accurate market quotations are not
readily available are valued in accordance with the Trust's valuation
procedures. 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 the Fund may publish yield and average annual total return
in advertisements and communications to shareholders or prospective investors.
 
  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 net
asset value 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.
 
                                       21
<PAGE>
 
  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 (i.e., net asset value) 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. The Fund may also from time
to time advertise total return on an 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, the Fund may from time to time advertise
its performance relative to certain performance rankings and indices.
 
  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 ending net asset value for the
period for which the distribution rates are being calculated.
 
  The investment results of the 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 Fund may, in its discretion, from time to time make a
list of the Fund's holdings available to investors upon request.
 
  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 of the Fund for the same
period will differ. Due to the fees payable under the Service Plan and the
Administration Plan, the investment performance, for any period, of the
Institutional Shares will always be higher than that of the Service Shares and
the Administration Shares and the investment performance of the Administration
Shares will always be higher than that of the Service Shares. See "Shares of
the Trust" below.
 
                              SHARES OF THE TRUST
 
  The Fund is a series of Goldman Sachs Trust, which was organized under the
laws of The Commonwealth of Massachusetts on September 24, 1987 as a
Massachusetts business trust under an Agreement and Declaration of Trust, as
amended (the "Trust Agreement"). Under the Trust Agreement, the Trustees are
authorized to issue an unlimited number of shares of beneficial interest, $.001
par value per share. The Trustees of the Trust are responsible for the overall
management and supervision of its affairs. The Trustees of the Trust have
authority under the Trust Agreement to create and classify shares of beneficial
interest in separate series, without further action by shareholders. As of the
date of this Prospectus, the Trustees have authorized shares of the Fund and
ten other series. 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. Pursuant thereto, the Trustees have authorized the
issuance of three classes of shares of the Fund. These classes are:
Institutional Shares, Administration Shares and Service Shares. As of October
31, 1994, no Service Shares of the Fund were outstanding.
 
  Each Institutional Share, Administration Share and Service Share of the Fund
represents an equal proportionate interest in the assets belonging to the Fund.
All Fund expenses are based on a percentage of the Fund's aggregate average net
assets, except that the respective administration and service fees relating to
a particular class will be borne exclusively by that class. It is contemplated
that most Administration Shares and Service Shares will be held in accounts of
which the record owner is a bank or other institution acting, directly or
through an agent, as nominee for its customers who are the beneficial
 
                                       22
<PAGE>
 
owners of the shares or another organization designated by such bank or
institution. Administration Shares and Service Shares will each be marketed
only to such institutional investors, at net asset value with no sales load.
Institutional Shares may be purchased for accounts in the name of an investor
or institution that is not compensated by the Fund for services provided to the
institution's customers. Administration Shares may be purchased for accounts
held in the name of an institution that provides certain account administration
services to its customers, including maintenance of account records and
processing orders to purchase, redeem or exchange Administration Shares.
Administration Shares bear the cost of account administration fees at the
annual rate of up to 0.25% of the average daily net assets of such
Administration Shares. Service Shares may be purchased for accounts held in the
name of an institution that provides certain account administration and
shareholder liaison services to its customers, including maintenance of account
records and processing orders to purchase, redeem or exchange Service Shares,
responding to customer inquiries and assisting customers with investment
procedures. Service Shares bear the cost of service fees at the annual rate of
up to 0.50% of the average daily net assets of such Service Shares.
(Institutions that provide services to holders of Administration or Service
Shares are referred to in this Prospectus as "Service Organizations").
 
  It is possible that an institution or its affiliate may offer different
classes of shares (i.e., Institutional, Administration and Service Shares) to
its customers and thus receive different compensation with respect to different
classes of shares of the Fund. Administration Shares and Service Shares may
each have certain exclusive voting rights on matters relating to their
respective plans. Shares of each class may be exchanged only for shares of the
same class in another fund and certain money market funds sponsored by Goldman
Sachs. The Fund may amend such policy in the future. Dividends paid by the
Fund, if any, with respect to each class of shares will be calculated in the
same manner, at the same time on the same day and will be in the same amount,
except for differences caused by the fact that the respective fees under
Administration and Service Plans relating to a particular class will be borne
exclusively by that class. Similarly, the net asset value per share will vary
depending on the class of shares purchased.
 
  Certain aspects of the shares may be altered, after advance notice to
shareholders, if it is deemed necessary in order to satisfy certain tax
regulatory requirements.
 
  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 Fund available for distribution to such shareholders. All shares entitle
their holders to one vote per share, are freely transferable and have no
preemptive, subscription or conversion rights.
 
  Under Massachusetts law, there is a remote possibility that shareholders of a
business trust could, under certain circumstances, be held personally liable as
partners for the obligations of such trust. The Trust Agreement contains
provisions intended to limit such liability and to provide indemnification out
of Trust property of any shareholder charged or held personally liable for
obligations or liabilities of the Trust solely by reason of being or having
been a shareholder of the Trust and not because of such shareholder's acts or
omissions or for some other reason. Thus, the risk of a shareholder incurring
financial loss on account of shareholder liability is limited to circumstances
in which the Trust itself would be unable to meet its obligations.
 
  Unless otherwise required by the Act, ordinarily it will not be necessary for
the Trust to hold annual meetings of shareholders. As a result, shareholders
may not consider each year the election of Trustees or the appointment of
independent accountants. Shareholders may remove a Trustee by the affirmative
 
                                       23
<PAGE>
 
vote of at least two-thirds of the Trust's outstanding shares and the Trustees
must promptly call a meeting for such purpose when requested to do so in
writing by the recordholders of not less than 10% of the outstanding shares of
the Trust. Shareholders may, under certain circumstances, communicate with
other shareholders in connection with requesting a special meeting of
shareholders. The Board of Trustees, however, 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 share
certificates. 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. Shares and any dividends and
distributions paid by the Fund are reflected in account statements from the
Transfer Agent.
 
                                    TAXATION
 
FEDERAL TAXES
 
  The Fund is treated as a separate entity for tax purposes. The Fund has
qualified and elected to be treated as a regulated investment company under
Subchapter M of the Code, and it intends to continue to qualify for such
treatment. To qualify for treatment as a regulated investment company, the 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, the 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 the Fund from net investment income, the excess of net
short-term capital gain over net long-term capital loss and original issue
discount or certain market discount income will be taxable to shareholders as
ordinary income. Dividends paid by the Fund from the excess of net long-term
capital gain over net short-term capital loss will be taxable as long-term
capital gains regardless of how long the shareholders have held their shares.
These tax consequences will apply regardless of whether distributions are
received in cash or reinvested in shares. Certain distributions paid by the
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 Fund 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 on which a shareholder
may recognize a gain or loss.
 
  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 the Fund with their correct taxpayer
identification number and certain certifications 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 Fund.
 
                                       24
<PAGE>
 
OTHER TAXES
 
  In addition to federal taxes, a shareholder may be subject to state, local or
foreign taxes on payments received from the Fund. A state income (and possibly
local income and/or intangible property) tax exemption is generally available
to the extent the Fund's distributions are derived from interest on (or, in the
case of intangibles 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.
 
  Shareholders should consult their own tax advisors regarding specific
questions as to United States federal, state, local and foreign tax
consequences of investing in the Fund in their particular circumstances. See
the Additional Statement for a further discussion of certain tax consequences
of investing in shares of the Fund.
 
                             ADDITIONAL INFORMATION
 
  The term "majority of the outstanding shares" of the Fund means the vote of
the lesser of (i) 67% or more of the shares present at a meeting, if the
holders of more than 50% of the outstanding shares of the Fund are present or
represented by proxy, or (ii) more than 50% of the outstanding shares of the
Fund.
 
  As used in this Prospectus, the term "Business Day" refers to those days when
the Investment Adviser, The Northern Trust Company, State Street Bank and Trust
Company and the Federal Reserve Bank of New York are open for business, which
is Monday through Friday except for holidays. Such holidays currently are: New
Year's Day (observed), Martin Luther King Day, Presidents' Day (observed), Good
Friday, Memorial Day (observed), Independence Day, Labor Day, Columbus Day,
Thanksgiving Day and Christmas. On those days when one or more of such
organizations close early as a result of such day being a partial holiday or
otherwise, the right is reserved to advance the time on that day by which
purchase and redemption requests must be received.
 
                                       25
<PAGE>
 
                              ADMINISTRATION PLAN
 
  The Trust, on behalf of the Fund, has adopted an Administration Plan with
respect to the Administration Shares which authorizes the Fund to compensate
Service Organizations for providing account administration services to their
customers who are beneficial owners of such Shares. The Trust, on behalf of the
Fund, will enter into agreements with Service Organizations which purchase
Administration Shares on behalf of their customers ("Service Agreements"). The
Service Agreements will 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.
 
  For the fiscal year ended October 31, 1994, the Trust, on behalf of the Fund,
paid the Service Organizations fees at an annual rate of 0.25% of the Fund's
average daily net assets attributable to Administration Shares.
 
  Holders of Administration Shares of the Fund will bear all expenses and fees
paid to Service Organizations with respect to such Shares as well as any other
expenses which are directly attributable to such Shares.
 
  Service Organizations (other than broker-dealers) 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 Fund, will accrue payments made pursuant to a Service Agreement daily. All
inquiries of beneficial owners of Administration Shares should be directed to
such owners' Service Organization.
 
                            REPORTS TO SHAREHOLDERS
 
  Recordholders of Administration Shares of the Fund will receive an annual
report containing audited financial statements and a semi-annual 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
 
  It is expected that all direct purchasers of Administration Shares of the
Fund will be Service Organizations or their nominees. Customers of Service
Organizations may invest in Administration Shares only through their Service
Organizations. Administration Shares of the Fund may be purchased by a Service
Organization through Goldman Sachs at the net asset value per share next
determined after
 
                                       26
<PAGE>
 
receipt from a Service Organization of an order without the imposition of a
sales load. If, by 3:00 p.m. Chicago time (4:00 p.m. New York time), an order,
a check or a Federal Reserve draft is received from a Service Organization by
Goldman Sachs, the price per share will be the net asset value per share
computed on the day the purchase order or such form of payment is received. See
"Net Asset Value."
 
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
a check drawn on a foreign bank will not be accepted) or Federal Reserve draft
made payable to "Goldman Sachs Trust--GS Short-Term Government Agency Fund" and
should be directed to Goldman Sachs Trust--GS Short-Term Government Agency
Fund, c/o GSAM Shareholder Services, 4900 Sears Tower, Chicago, Illinois 60606.
Payment 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.
 
OTHER PURCHASE INFORMATION
 
  The Fund does 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 Organization for further
information concerning such requirements and charges.
 
  The Fund reserves the right to redeem Administration Shares of any Service
Organization whose account balance is less than $100 as a result of earlier
redemptions. Such redemptions will not be implemented if the value of such
Shareholder'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 Administration Shares are being redeemed
to allow them to purchase sufficient additional Administration Shares to avoid
such redemption.
 
PURCHASE BY FEDERAL FUNDS WIRE OR ACH TRANSFER. If a purchase order is received
from a Service Organization by Goldman Sachs by 3:00 p.m. Chicago time, the
purchased shares will be issued and dividends will begin on such shares on the
next Business Day, provided that a Federal Funds wire or an ACH transfer is
received by Northern on such day.
 
 
                                       27
<PAGE>
 
PURCHASE BY CHECK OR FEDERAL RESERVE DRAFT. If a Service Organization's check
or Federal Reserve draft is received by Goldman Sachs by 3:00 p.m. Chicago
time, the purchased shares will be issued and dividends will begin on such
shares on the next Business Day after the Service Organization's check or
Federal Reserve draft is received by Goldman Sachs.
 
  The Fund and Goldman Sachs each reserves the right to reject any specific
purchase order (including exchanges) or to restrict purchases or exchanges of
Administration Shares by a particular purchaser (or group of related
purchasers). The Fund or Goldman Sachs may reject or restrict purchases or
exchanges of Administration Shares by a particular purchaser or group, for
example, when a pattern of frequent purchases and sales or exchanges of
Administration Shares of the Fund is evident, or if the purchase, sale or
exchange orders are, or a subsequent abrupt redemption might be, of a size that
would disrupt management of the Fund.
 
                               EXCHANGE PRIVILEGE
 
  Administration Shares of the Fund may be exchanged by Service Organizations
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 relevant
class of any portfolio of Goldman Sachs Money Market Trust at the net asset
value next determined either by writing to Goldman Sachs, Attention: Goldman
Sachs Trust--GS Short-Term Government Agency Fund, 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
3:00 p.m. Chicago time). A shareholder should obtain and read the prospectus
relating to any other fund and its shares or units 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 times of drastic economic or market changes the telephone exchange
privilege may be difficult to implement. 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. For federal income tax purposes, an
exchange is treated as a sale of the Administration Shares surrendered in the
exchange, on which an investor may realize a gain or loss, followed by a
purchase of Administration Shares or the relevant class of any portfolio of
Goldman Sachs Money Market Trust 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 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 Fund will redeem its Administration Shares upon request of the
recordholder of such Shares on any Business Day at the net asset value next
determined after the receipt by the Transfer Agent of such request in proper
form. See "Net Asset Value." If Administration Shares to be redeemed were
recently purchased by check, the 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 writing to or calling the
Transfer
 
                                       28
<PAGE>
 
Agent at the address or telephone number set forth on the 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. 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
Fund, the Trust nor Goldman Sachs will be responsible for the authenticity of
redemption or exchange instructions received by telephone. If Goldman Sachs
receives a redemption request by 3:00 p.m. Chicago time, the Administration
Shares to be redeemed earn dividends with respect to the day the request is
received.
 
  The Fund will arrange for the proceeds of redemptions effected by any means
to be wired to the recordholder of Administration Shares. Redemption proceeds
will normally be wired on the next Business Day in Federal Funds (for a total
one-day delay), but may be paid up to seven (7) 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. Once wire transfer
instructions have been given by Goldman Sachs, neither the Fund, 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 Organization.
 
  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.
 
  Except with respect to Service Organizations whose account balances are less
than $100, Administration Shares of the Fund are not redeemable at the option
of the Fund unless the Board of Trustees of the Trust determines in its sole
discretion that failure to so redeem may have material adverse consequences to
the shareholders of the Fund. The Fund, however, assumes no responsibility to
compel redemptions.
 
                               ----------------
 
                                       29
<PAGE>
 
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
 
  NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY REPRE-
SENTATIONS OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS, AND, IF GIVEN OR
MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING
BEEN AUTHORIZED. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY ANY SECURITIES OTHER THAN THE SECURITIES TO
WHICH IT RELATES OR AN OFFER TO SELL OR THE SOLICITATION OF AN OFFER TO BUY
SUCH SECURITIES IN ANY CIRCUMSTANCES IN WHICH SUCH OFFER OR SOLICITATION IS
UNLAWFUL. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER
SHALL, UNDER ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THERE HAS BEEN NO
CHANGE IN THE AFFAIRS OF THE TRUST OR THE FUND SINCE THE DATE HEREOF OR THAT
THE INFORMATION CONTAINED HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO ITS
DATE.
 
                               ----------------
 
                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                          PAGE
                                                                          ----
<S>                                                                       <C>
Summary.................................................................    2
Financial Highlights....................................................    7
Investment Objective and Policies.......................................    8
Investment Adviser......................................................    9
Special Investment Methods..............................................    9
Yield, Market Value and Risk Considerations of
 Mortgage-Backed Securities.............................................   13
Other Investments and Practices.........................................   14
Investment Restrictions.................................................   18
Portfolio Turnover......................................................   18
Management..............................................................   19
Dividends...............................................................   20
Net Asset Value.........................................................   21
Performance Information.................................................   21
Shares of the Trust.....................................................   22
Taxation................................................................   24
Additional Information..................................................   25
Administration Plan.....................................................   26
Reports to Shareholders.................................................   26
Purchase of Administration Shares.......................................   26
Exchange Privilege......................................................   28
Redemption of Administration Shares.....................................   28
</TABLE>
 
- -------------------------------------------------------------------------------
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                                 GS SHORT-TERM
                            GOVERNMENT AGENCY FUND
                             ADMINISTRATION SHARES
 
                                  MANAGED BY
                                  ----------
 
                              GOLDMAN SACHS FUNDS
 
                               MANAGEMENT, L.P.
                                AN AFFILIATE OF
                             GOLDMAN, SACHS & CO.
 
                                 -------------
 
                                  PROSPECTUS

                                 -------------
 
                             GOLDMAN, SACHS & CO.
 
 
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