MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
497, 1998-08-05
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<PAGE>
              PROSPECTUS
              JULY 30, 1998
 
              Morgan Stanley Dean Witter International SmallCap Fund (the
"Fund") is an open-end management investment company whose investment objective
is to seek long-term growth of capital. The Fund seeks to meet its investment
objective by investing primarily in securities of small non-U.S. companies.
 
               The Fund offers four classes of shares (each, a "Class"), each
with a different combination of sales charges, ongoing fees and other features.
The different distribution arrangements permit an investor to choose the method
of purchasing shares that the investor believes is most beneficial given the
amount of the purchase, the length of time the investor expects to hold the
shares and other relevant circumstances. (See "Purchase of Fund
Shares--Alternative Purchase Arrangements.")
 
               This Prospectus sets forth concisely the information you should
know before investing in the Fund. It should be read and retained for future
reference. Additional information about the Fund is contained in the Statement
of Additional Information, dated July 30, 1998, which has been filed with the
Securities and Exchange Commission, and which is available at no charge upon
request of the Fund at the address or telephone numbers listed on this page. The
Statement of Additional Information is incorporated herein by reference.
 
     MORGAN STANLEY DEAN WITTER
     DISTRIBUTORS INC.,
      DISTRIBUTOR
 
      TABLE OF CONTENTS
 
Prospectus Summary/2
Summary of Fund Expenses/4
Financial Highlights/6
The Fund and its Management/9
Investment Objective and Policies/10
  Risk Considerations and
  Investment Practices/11
Investment Restrictions/19
Purchase of Fund Shares/19
Shareholder Services/31
Redemptions and Repurchases/34
Dividends, Distributions and Taxes/35
Performance Information/36
Additional Information/37
 
SHARES OF THE FUND ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK, AND THE SHARES ARE NOT FEDERALLY INSURED BY THE FEDERAL DEPOSIT
INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD, OR ANY OTHER AGENCY.
 
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.
 
    Morgan Stanley Dean Witter
    International SmallCap Fund
    Two World Trade Center
    New York, New York 10048
    (212) 392-2550 or
    (800) 869-NEWS (toll-free)
<PAGE>
PROSPECTUS SUMMARY
- --------------------------------------------------------------------------------
 
   
<TABLE>
<S>               <C>
The               The Fund is organized as a Trust, commonly known as a Massachusetts business trust, and is an open-
Fund              end management investment company. The Fund invests primarily in securities of small non-U.S.
                  companies.
- ----------------------------------------------------------------------------------------------------------------------
Shares Offered    Shares of beneficial interest with $0.01 par value (see page 37). The Fund offers four Classes of
                  shares, each with a different combination of sales charges, ongoing fees and other features (see
                  pages 20-30).
- ----------------------------------------------------------------------------------------------------------------------
Minimum           The minimum initial investment for each Class is $1,000 ($100 if the account is opened through
Purchase          EasyInvest-SM-). Class D shares are only available to persons investing $5 million ($25 million for
                  certain qualified plans) or more and to certain other limited categories of investors. For the
                  purpose of meeting the minimum $5 million (or $25 million) investment for Class D shares, and
                  subject to the $1,000 minimum initial investment for each Class of the Fund, an investor's existing
                  holdings of Class A shares and shares of funds for which Morgan Stanley Dean Witter Advisors Inc.
                  serves as investment manager ("Morgan Stanley Dean Witter Funds") that are sold with a front-end
                  sales charge, and concurrent investments in Class D shares of the Fund and other Morgan Stanley Dean
                  Witter Funds that are multiple class funds, will be aggregated. The minimum subsequent investment is
                  $100 (see page 20).
- ----------------------------------------------------------------------------------------------------------------------
Investment        The investment objective of the Fund is to seek long-term growth of capital (see page 10).
Objective
- ----------------------------------------------------------------------------------------------------------------------
Investment        Morgan Stanley Dean Witter Advisors Inc., the Investment Manager of the Fund, and its wholly-owned
Manager and       subsidiary, Morgan Stanley Dean Witter Services Company Inc., serve in various investment
Sub-Advisor       management, advisory, management and administrative capacities to 101 investment companies and other
                  portfolios with net assets under management of approximately $115.2 billion at June 30, 1998. Morgan
                  Stanley Asset Management Inc. ("MSAM"), an affiliate of the Investment Manager, has been retained by
                  the Investment Manager as Sub-Advisor to provide investment advice and manage the Fund's portfolio.
                  MSAM conducts a worldwide investment advisory business. As of June 30, 1998, MSAM, together with its
                  institutional investment management affiliates, managed assets of approximately $169 billion (see
                  page 9).
- ----------------------------------------------------------------------------------------------------------------------
Management        The Investment Manager receives a monthly fee at the annual rate of 1.15% of the Fund's daily net
Fee               assets, of which the Sub-Advisor receives 40% (see page 9).
- ----------------------------------------------------------------------------------------------------------------------
Distributor and   Morgan Stanley Dean Witter Distributors Inc. (the "Distributor"). The Fund has adopted a
Distribution Fee  distribution plan pursuant to Rule 12b-1 under the Investment Company Act (the "12b-1 Plan") with
                  respect to the distribution fees paid by the Class A, Class B and Class C shares of the Fund to the
                  Distributor. The entire 12b-1 fee payable by Class A and a portion of the 12b-1 fee payable by each
                  of Class B and Class C equal to 0.25% of the average daily net assets of the Class are currently
                  each characterized as a service fee within the meaning of the National Association of Securities
                  Dealers, Inc. guidelines. The remaining portion of the 12b-1 fee, if any, is characterized as an
                  asset-based sales charge (see pages 20 and 29).
- ----------------------------------------------------------------------------------------------------------------------
Alternative       Four classes of shares are offered:
Purchase
Arrangements      - Class A shares are offered with a front-end sales charge, starting at 5.25% and reduced for larger
                  purchases. Investments of $1 million or more (and investments by certain other limited categories of
                  investors) are not subject to any sales charge at the time of purchase but a contingent deferred
                  sales charge ("CDSC") of 1.0% may be imposed on redemptions within one year of purchase. The Fund is
                  authorized to reimburse the Distributor for specific expenses incurred in promoting the distribution
                  of the Fund's Class A shares and servicing shareholder accounts pursuant to the Fund's 12b-1 Plan.
                  Reimbursement may in no event exceed an amount equal to payments at an annual rate of 0.25% of
                  average daily net assets of the Class (see pages 20, 23 and 28).
</TABLE>
    
 
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                                       2
<PAGE>
- --------------------------------------------------------------------------------
   
<TABLE>
<S>               <C>
                  - Class B shares are offered without a front-end sales charge, but will in most cases be subject to
                  a CDSC (scaled down from 5.0% to 1.0%) if redeemed within six years after purchase. The CDSC will be
                  imposed on any redemption of shares if after such redemption the aggregate current value of a Class
                  B account with the Fund falls below the aggregate amount of the investor's purchase payments made
                  during the six years preceding the redemption. A different CDSC schedule applies to investments by
                  certain qualified plans. Class B shares are also subject to a 12b-1 fee assessed at the annual rate
                  of 1.0% of the lesser of: (a) the average daily net sales of the Fund's Class B shares or (b) the
                  average daily net assets of Class B. All shares of the Fund held prior to July 28, 1997 have been
                  designated Class B shares. Shares held before May 1, 1997 will convert to Class A shares in May,
                  2007. In all other instances, Class B shares convert to Class A shares approximately ten years after
                  the date of the original purchase (see pages 20, 26 and 28).
                  - Class C shares are offered without a front-end sales charge, but will in most cases be subject to
                  a CDSC of 1.0% if redeemed within one year after purchase. The Fund is authorized to reimburse the
                  Distributor for specific expenses incurred in promoting the distribution of the Fund's Class C
                  shares and servicing shareholder accounts pursuant to the Fund's 12b-1 Plan. Reimbursement may in no
                  event exceed an amount equal to payments at an annual rate of 1.0% of average daily net assets of
                  the Class (see pages 20 and 28).
                  - Class D shares are offered only to investors meeting an initial investment minimum of $5 million
                  ($25 million for certain qualified plans) and to certain other limited categories of investors.
                  Class D shares are offered without a front-end sales charge or CDSC and are not subject to any 12b-1
                  fee (see pages 20 and 28).
- ----------------------------------------------------------------------------------------------------------------------
Dividends         Dividends from net investment income and distributions from net capital gains, if any, are paid
and               annually. The Fund may, however, determine to retain all or part of any net long-term capital gains
Capital Gains     in any year for reinvestment. Dividends and capital gains distributions paid on shares of a Class
Distributions     are automatically reinvested in additional shares of the same Class at net asset value unless the
                  shareholder elects to receive cash. Shares acquired by dividend and distribution reinvestment will
                  not be subject to any sales charge or CDSC (see pages 31 and 35).
- ----------------------------------------------------------------------------------------------------------------------
Redemption        Shares are redeemable by the shareholder at net asset value less any applicable CDSC on Class A,
                  Class B or Class C shares. An account may be involuntarily redeemed if the total value of the
                  account is less than $100 or, if the account was opened through EasyInvest-SM-, if after twelve
                  months the shareholder has invested less than $1,000 in the account (see page 34).
- ----------------------------------------------------------------------------------------------------------------------
Risk              The net asset value of the Fund's shares will fluctuate with changes in market value of portfolio
Considerations    securities. Investing in lesser known, smaller capitalization companies may involve greater risk of
                  volatility in the Fund's net asset value than is customarily associated with investing in larger,
                  more established companies. In addition, it should be recognized that the foreign securities and
                  markets in which the Fund invests pose different and greater risks than those customarily associated
                  with domestic securities and their markets. The Fund may also invest in options and futures
                  transactions which may be considered speculative in nature and may involve greater risks than those
                  customarily assumed by other investment companies which do not invest in such instruments (see pages
                  11-18).
</TABLE>
    
 
- --------------------------------------------------------------------------------
 
  THE ABOVE IS QUALIFIED IN ITS ENTIRETY BY THE DETAILED INFORMATION APPEARING
         ELSEWHERE IN THE PROSPECTUS AND IN THE STATEMENT OF ADDITIONAL
                                  INFORMATION.
 
                                       3
<PAGE>
SUMMARY OF FUND EXPENSES
- --------------------------------------------------------------------------------
 
    The following table illustrates all expenses and fees that a shareholder of
the Fund will incur. Except as otherwise noted, the expenses and fees set forth
below are based on the expenses and fees for the fiscal year ended May 31, 1998.
 
   
<TABLE>
<CAPTION>
                                                                                   CLASS A    CLASS B    CLASS C    CLASS D
                                                                                  ---------   -------   ---------   -------
<S>                                                                               <C>         <C>       <C>         <C>
SHAREHOLDER TRANSACTION EXPENSES
- --------------------------------------------------------------------------------
Maximum Sales Charge Imposed on Purchases (as a percentage of offering price)...   5.25%(1)    None      None        None
Sales Charge Imposed on Dividend Reinvestments..................................   None        None      None        None
Maximum Contingent Deferred Sales Charge (as a percentage of original purchase
  price or redemption proceeds).................................................   None(2)     5.00%(3)  1.00%(4)    None
Redemption Fees.................................................................   None        None      None        None
Exchange Fee....................................................................   None        None      None        None
ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)
- --------------------------------------------------------------------------------
Management Fees (5)*............................................................   1.15%       1.15%     1.15%       1.15%
12b-1 Fees (6) (7)..............................................................   0.24%       1.00%     1.00%       None
Other Expenses (5)..............................................................   0.85%       0.85%     0.85%       0.85%
Total Fund Operating Expenses (8)*..............................................   2.24%       3.00%     3.00%       2.00%
</TABLE>
    
 
- ------------
(1) REDUCED FOR PURCHASES OF $25,000 AND OVER (SEE "PURCHASE OF FUND
    SHARES--INITIAL SALES CHARGE ALTERNATIVE--CLASS A SHARES").
 
(2) INVESTMENTS THAT ARE NOT SUBJECT TO ANY SALES CHARGE AT THE TIME OF PURCHASE
    ARE SUBJECT TO A CDSC OF 1.00% THAT WILL BE IMPOSED ON REDEMPTIONS MADE
    WITHIN ONE YEAR AFTER PURCHASE, EXCEPT FOR CERTAIN SPECIFIC CIRCUMSTANCES
    (SEE "PURCHASE OF FUND SHARES--INITIAL SALES CHARGE ALTERNATIVE--CLASS A
    SHARES").
 
(3) THE CDSC IS SCALED DOWN TO 1.00% DURING THE SIXTH YEAR, REACHING ZERO
    THEREAFTER.
 
(4) ONLY APPLICABLE TO REDEMPTIONS MADE WITHIN ONE YEAR AFTER PURCHASE (SEE
    "PURCHASE OF FUND SHARES--LEVEL LOAD ALTERNATIVE--CLASS C SHARES").
 
(5) MANAGEMENT FEES AND OTHER EXPENSES ARE BASED ON THE FUND'S ACTUAL AGGREGATE
    EXPENSES.
 
(6) THE 12b-1 FEE IS ACCRUED DAILY AND PAYABLE MONTHLY. THE ENTIRE 12b-1 FEE
    PAYABLE BY CLASS A AND A PORTION OF THE 12b-1 FEE PAYABLE BY EACH OF CLASS B
    AND CLASS C EQUAL TO 0.25% OF THE AVERAGE DAILY NET ASSETS OF THE CLASS ARE
    CURRENTLY EACH CHARACTERIZED AS A SERVICE FEE WITHIN THE MEANING OF NATIONAL
    ASSOCIATION OF SECURITIES DEALERS, INC. ("NASD") GUIDELINES AND ARE PAYMENTS
    MADE FOR PERSONAL SERVICE AND/OR MAINTENANCE OF SHAREHOLDER ACCOUNTS. THE
    REMAINDER OF THE 12b-1 FEE, IF ANY, IS AN ASSET-BASED SALES CHARGE, AND IS A
    DISTRIBUTION FEE PAID TO THE DISTRIBUTOR TO COMPENSATE IT FOR THE SERVICES
    PROVIDED AND THE EXPENSES BORNE BY THE DISTRIBUTOR AND OTHERS IN THE
    DISTRIBUTION OF THE FUND'S SHARES (SEE "PURCHASE OF FUND SHARES--PLAN OF
    DISTRIBUTION").
 
(7) UPON CONVERSION OF CLASS B SHARES TO CLASS A SHARES, SUCH SHARES WILL BE
    SUBJECT TO THE LOWER 12b-1 FEE APPLICABLE TO CLASS A SHARES. NO SALES CHARGE
    IS IMPOSED AT THE TIME OF CONVERSION OF CLASS B SHARES TO CLASS A SHARES.
    CLASS C SHARES DO NOT HAVE A CONVERSION FEATURE AND, THEREFORE, ARE SUBJECT
    TO AN ONGOING 1.00% DISTRIBUTION FEE (SEE "PURCHASE OF FUND
    SHARES--ALTERNATIVE PURCHASE ARRANGEMENTS").
 
(8) THERE WERE NO OUTSTANDING SHARES OF CLASS A, CLASS C OR CLASS D PRIOR TO
    JULY 28, 1997.
 
 *  EFFECTIVE DECEMBER 1, 1997, THE INVESTMENT MANAGEMENT AGREEMENT BETWEEN THE
    INVESTMENT MANAGER AND THE FUND WAS AMENDED TO REDUCE THE FEE PAID BY THE
    FUND TO THE INVESTMENT MANAGER FROM AN ANNUAL RATE OF 1.25% OF THE FUND'S
    AVERAGE DAILY NET ASSETS TO 1.15% OF THE FUND'S AVERAGE DAILY NET ASSETS.
    "MANAGEMENT FEES" AND "TOTAL FUND OPERATING EXPENSES" HAVE BEEN RESTATED TO
    REFLECT THE LOWER FEE.
 
                                       4
<PAGE>
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
EXAMPLES                                            1 Year   3 Years   5 Years   10 Years
- --------------------------------------------------  ------   -------   -------   --------
<S>                                                 <C>      <C>       <C>       <C>
You would pay the following expenses on a $1,000
 investment assuming (1) a 5% annual return and
 (2) redemption at the end of each time period:
    Class A.......................................   $74       $119      $166      $296
    Class B.......................................   $80       $123      $178      $332
    Class C.......................................   $40       $93       $158      $332
    Class D.......................................   $20       $63       $108      $233
 
You would pay the following expenses on the same
 $1,000 investment assuming no redemption at the
 end of the period:
    Class A.......................................   $74       $119      $166      $296
    Class B.......................................   $30       $93       $158      $332
    Class C.......................................   $30       $93       $158      $332
    Class D.......................................   $20       $63       $108      $233
</TABLE>
 
    THE ABOVE EXAMPLES SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR
FUTURE EXPENSES OR PERFORMANCE. ACTUAL EXPENSES OF EACH CLASS MAY BE GREATER OR
LESS THAN THOSE SHOWN.
 
    The purpose of this table is to assist the investor in understanding the
various costs and expenses that an investor in the Fund will bear directly or
indirectly. For a more complete description of these costs and expenses, see
"Purchase of Fund Shares--Plan of Distribution" and "Redemptions and
Repurchases."
 
    Long-term shareholders of Class B and Class C may pay more in sales charges,
including distribution fees, than the economic equivalent of the maximum
front-end sales charges permitted by the NASD.
 
                                       5
<PAGE>
FINANCIAL HIGHLIGHTS
- --------------------------------------------------------------------------------
 
    The following ratios and per share data for a share of beneficial interest
of Class B outstanding throughout the periods have been audited by
PricewaterhouseCoopers LLP, independent accountants. The financial highlights
should be read in conjunction with the financial statements, notes thereto, and
the unqualified report of independent accountants, which are contained in the
Statement of Additional Information. Further information about the performance
of the Fund is contained in the Fund's Annual Report to Shareholders, which may
be obtained without charge upon request to the Fund.
 
    Selected ratios and per share data for a share of beneficial interest
outstanding throughout each period:
 
<TABLE>
<CAPTION>
                                                             FOR THE
                                                              PERIOD
                                                             JULY 29,
                                                              1994*
                             FOR THE YEAR ENDED MAY 31,      THROUGH
                          --------------------------------   MAY 31,
CLASS B SHARES             1998**++     1997       1996        1995
                          ----------  ---------  ---------  ----------
PER SHARE OPERATING
 PERFORMANCE:
<S>                       <C>         <C>        <C>        <C>
Net asset value,
 beginning of period..... $     8.92  $   10.28  $    8.54  $   10.00
                          ----------  ---------  ---------  ----------
Net investment loss......      (0.11)     (0.16)     (0.08)     (0.08)
Net realized and
 unrealized gain
 (loss)..................      (0.01)     (0.88)      1.82      (1.38)
                          ----------  ---------  ---------  ----------
Total from investment
 operations..............      (0.12)     (1.04)      1.74      (1.46)
                          ----------  ---------  ---------  ----------
Dividends from net
 investment income.......         --      (0.38)        --         --
                          ----------  ---------  ---------  ----------
Capital contribution.....         --       0.06         --         --
                          ----------  ---------  ---------  ----------
Net asset value, end of
 period.................. $     8.80  $    8.92  $   10.28  $    8.54
                          ----------  ---------  ---------  ----------
                          ----------  ---------  ---------  ----------
TOTAL INVESTMENT
 RETURN+.................    (1.35)%    (9.52)%(3)    20.37%  (14.60)%(1)
RATIOS TO AVERAGE NET
 ASSETS:
Expenses.................      3.06%      2.89%      2.85%      2.90%(2)
Net investment loss......    (1.24)%    (1.34)%    (1.09)%  (1.12)%(2)
SUPPLEMENTAL DATA:
Net assets, end of
 period, in thousands....    $69,960   $105,308   $145,254    $93,729
Portfolio turnover
 rate....................       178%        46%        44%        41%(1)
Average commission rate
 paid....................    $0.0047    $0.0030    $0.0069         --
</TABLE>
 
- -------------
 * COMMENCEMENT OF OPERATIONS.
 ** PRIOR TO JULY 28, 1997, THE FUND ISSUED ONE CLASS OF SHARES. ALL SHARES OF
    THE FUND HELD PRIOR TO THAT DATE HAVE BEEN DESIGNATED CLASS B SHARES.
 ++ THE PER SHARE AMOUNTS WERE COMPUTED USING AN AVERAGE NUMBER OF SHARES
    OUTSTANDING DURING THE PERIOD.
 + DOES NOT REFLECT THE DEDUCTION OF SALES CHARGE. CALCULATED BASED ON THE NET
   ASSET VALUE AS OF THE LAST BUSINESS DAY OF THE PERIOD.
(1) NOT ANNUALIZED.
(2) ANNUALIZED.
(3) INCLUDES VOLUNTARY CAPITAL CONTRIBUTION FROM THE FORMER SUB-ADVISOR, THE
    EFFECT OF WHICH WAS TO INCREASE TOTAL RETURN BY 0.59%.
 
                                       6
<PAGE>
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<TABLE>
<CAPTION>
                                                                         FOR THE PERIOD
                                                                         JULY 28, 1997*
                                                                            THROUGH
CLASS A SHARES                                                           MAY 31, 1998++
                                                                        ----------------
<S>                                                                     <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..................................      $  8.96
Net realized and unrealized loss......................................        (0.11)
                                                                             ------
Net asset value, end of period........................................      $  8.85
                                                                             ------
                                                                             ------
TOTAL INVESTMENT RETURN+..............................................        (1.23)%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         2.52%(2)
Net investment income.................................................         0.03%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................         $318
Portfolio turnover rate...............................................          178%
Average commission rate paid..........................................      $0.0047
 
CLASS C SHARES
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..................................      $  8.96
                                                                             ------
Net investment loss...................................................        (0.09)
Net realized and unrealized loss......................................        (0.07)
                                                                             ------
Total from investment operations......................................        (0.16)
                                                                             ------
Net asset value, end of period........................................      $  8.80
                                                                             ------
                                                                             ------
TOTAL INVESTMENT RETURN+..............................................        (1.79)%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         3.16%(2)
Net investment loss...................................................        (1.37)%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................          $77
Portfolio turnover rate...............................................          178%
Average commission rate paid..........................................      $0.0047
</TABLE>
    
 
- -------------
 * THE DATE SHARES WERE ISSUED.
 ++ THE PER SHARE AMOUNTS WERE COMPUTED USING AN AVERAGE NUMBER OF SHARES
    OUTSTANDING DURING THE PERIOD.
   
 + DOES NOT REFLECT THE DEDUCTION OF SALES CHARGE. CALCULATED BASED ON THE NET
   ASSET VALUE AS OF THE LAST BUSINESS DAY OF THE PERIOD.
    
(1) NOT ANNUALIZED.
(2) ANNUALIZED.
 
                                       7
<PAGE>
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<TABLE>
<CAPTION>
                                                                         FOR THE PERIOD
                                                                         JULY 28, 1997*
                                                                            THROUGH
CLASS D SHARES                                                           MAY 31, 1998++
                                                                        ----------------
<S>                                                                     <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..................................      $  8.96
Net realized and unrealized loss......................................        (0.09)
                                                                             ------
Net asset value, end of period........................................      $  8.87
                                                                             ------
                                                                             ------
TOTAL INVESTMENT RETURN+..............................................        (1.00)%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         2.31%(2)
Net investment loss...................................................        (0.02)%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................         $850
Portfolio turnover rate...............................................          178%
Average commission rate paid..........................................      $0.0047
</TABLE>
    
 
- -------------
 * THE DATE SHARES WERE FIRST ISSUED.
 ++ THE PER SHARE AMOUNTS WERE COMPUTED USING AN AVERAGE NUMBER OF SHARES
    OUTSTANDING DURING THE PERIOD.
   
 + CALCULATED BASED ON THE NET ASSET VALUE AS OF THE LAST BUSINESS DAY OF THE
   PERIOD.
    
(1) NOT ANNUALIZED.
(2) ANNUALIZED.
 
                                       8
<PAGE>
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
    Morgan Stanley Dean Witter International SmallCap Fund (the "Fund")
(formerly named Dean Witter International SmallCap Fund) is an open-end
management investment company. The Fund is a trust of the type commonly known as
a "Massachusetts business trust" and was organized under the laws of The
Commonwealth of Massachusetts on April 21, 1994.
 
    Morgan Stanley Dean Witter Advisors Inc. ("MSDW Advisors" or the "Investment
Manager"), whose address is Two World Trade Center, New York, New York 10048, is
the Fund's Investment Manager. The Investment Manager is a wholly-owned
subsidiary of Morgan Stanley Dean Witter & Co. ("MSDW"), a preeminent global
financial services firm that maintains leading market positions in each of its
three primary businesses--securities, asset management and credit services. The
Investment Manager, which was incorporated in July, 1992 under the name Dean
Witter InterCapital Inc., changed its name to Morgan Stanley Dean Witter
Advisors Inc. on June 22, 1998.
 
    MSDW Advisors and its wholly-owned subsidiary, Morgan Stanley Dean Witter
Services Company Inc. ("MSDW Services"), serve in various investment management,
advisory, management and administrative capacities to 101 investment companies,
28 of which are listed on the New York Stock Exchange, with combined assets of
approximately $110.8 billion at June 30, 1998. The Investment Manager also
manages portfolios of pension plans, other institutions and individuals which
aggregated approximately $4.4 billion at such date.
 
    The Fund has retained the Investment Manager to provide administrative
services, manage its business affairs and supervise the investment of the Fund's
assets, including the placing of orders for the purchase and sale of portfolio
securities. MSDW Advisors has retained MSDW Services to perform the
aforementioned administrative services for the Fund.
 
    Under a Sub-Advisory Agreement between Morgan Stanley Asset Management Inc.
("MSAM"or the "Sub-Advisor") and the Investment Manager, the Sub-Advisor
provides the Fund with investment advice and portfolio management relating to
the Fund's investments, subject to the overall supervision of the Investment
Manager. The Fund's Trustees review the various services provided by the
Investment Manager and the Sub-Advisor to ensure that the Fund's general
investment policies and programs are being properly carried out and that
administrative services are being provided to the Fund in a satisfactory manner.
 
   
    The Sub-Advisor, whose address is 1221 Avenue of the Americas, New York, New
York 10020, together with its institutional investment management affiliates
manages, as of June 30, 1998, assets of approximately $169 billion primarily for
U.S. corporate and public employee benefit plans, investment companies,
endowments, foundations and wealthy individuals. MSAM, like MSDW Advisors, is a
wholly-owned subsidiary of MSDW.
    
 
    Prior to November, 1997, the Fund was sub-advised by another sub-advisor
(the "Former Sub-Advisor"). In August, 1997, the Former Sub-Advisor indicated
its intention to resign and on August 14, 1997, the Board of Trustees
recommended that a new Sub-Advisory Agreement with MSAM be submitted to
shareholders of the Fund for approval. The shareholders approved the new
Sub-Advisory Agreement with MSAM on November 25, 1997 and the new Sub-Advisory
Agreement became effective on December 1, 1997.
 
    At the same time that the new Sub-Advisory Agreement took effect, the
Investment Manager and the Fund amended the Investment Management Agreement
between the Investment Manager and the Fund to reduce the fee paid by the Fund
to the Investment Manager as full compensation for the services and facilities
furnished to the Fund and for expenses of the Fund assumed by the Investment
Manager under the Investment Management Agreement from an annual rate of 1.25%
of the Fund's
 
                                       9
<PAGE>
   
average daily net assets to 1.15% of the Fund's average daily net assets. As
compensation for its services provided pursuant to the Sub-Advisory Agreement,
the Investment Manager pays the Sub-Advisor monthly compensation equal to 40% of
its monthly compensation. For the fiscal year ended May 31, 1998, the Fund
accrued total compensation to the Investment Manager under the Investment
Management Agreement amounting to 1.21% of the Fund's average daily net assets
(of which 40% was accrued to the Sub-Advisor or Former Sub-Advisor by the
Investment Manager) and the total expenses of Class B amounted to 3.06% of the
average daily net assets of Class B. Shares of Class A, Class C and Class D were
first issued on July 28, 1997. The expenses of the Fund include: the fee of the
Investment Manager; the fee pursuant to the Plan of Distribution (see "Purchase
of Fund Shares"); taxes; transfer agent, custodian and auditing fees; certain
legal fees; and printing and other expenses relating to the Fund's operations
which are not expressly assumed by the Investment Manager under its Investment
Management Agreement with the Fund.
    
 
INVESTMENT OBJECTIVE AND POLICIES
- --------------------------------------------------------------------------------
 
    The investment objective of the Fund is long-term growth of capital. The
objective is a fundamental policy of the Fund and may not be changed without
shareholder approval. There is no assurance that the objective will be achieved.
 
    The Fund seeks to achieve its investment objective by investing, under
normal circumstances, at least 65% of its total assets in equity securities of
"small capitalization" companies located outside of the United States. A "small
capitalization" company is defined as being, at the time of purchase of its
equity securities by the Fund, among the smallest capitalized companies (where
capitalization is calculated by multiplying the total number of outstanding
shares of common stock of the company by their market price and by ranking the
resulting companies from smallest to largest capitalization) principally located
in a given country, whose aggregate capitalizations comprise no more than 35% of
the total market capitalization of the country. Equity securities in which the
Fund may invest include common stocks, rights or warrants to purchase common
stocks and securities convertible into common stocks.
 
    The Fund will invest in securities issued by issuers located in at least
three countries outside of the U.S. An issuer of a security will be considered
to be located in a given country if it: (i) is organized under the laws of the
country; (ii) derives at least 50% of its revenues from goods produced or sold,
investments made, or services performed in the country; (iii) maintains at least
50% of its assets in the country; or (iv) has securities which are principally
traded on a stock exchange in the country. The Fund currently intends to
emphasize issuers that fall within category (i) and (iv).
 
    The Fund currently may invest, from time to time, more than 25% of its total
assets in securities issued by issuers located in each of the United Kingdom and
Japan. The concentration of the Fund's assets in Japanese issuers will subject
the Fund to the risks of adverse social, political or economic events which
occur in Japan. Specifically, investments in the Japanese stock market may
entail a higher degree of risk than investments in other markets as, by
fundamental measures of corporate valuation, such as its high price-earnings
ratios and low dividend yields, the Japanese market as a whole may appear
expensive relative to other world stock markets, (I.E., the prices of Japanese
stocks may be relatively high). In addition, the prices of securities traded on
the Japanese markets may be more volatile than many other markets.
 
    Generally, the investment risks presented by equity markets in the United
Kingdom are comparable to those occurring in the U.S. However, the concentration
of the Fund's assets in British issuers will subject the Fund's investment
performance to social, political and economic events occurring in
 
                                       10
<PAGE>
the United Kingdom to a larger extent than to those occurring elsewhere,
internationally. In addition, political and economic developments occurring
elsewhere in Europe, especially as they relate to changes in the structure of
the European Economic Community, and the anticipated development of a unified
common market, may have profound effects upon the value of the British segment
of the Fund's portfolio of investments.
 
    The remainder of the Fund's portfolio equalling, at times, up to 35% of the
Fund's total assets, may be invested in (i) securities issued by companies whose
market capitalizations place them outside the Fund's definition of "small
capitalization" and/or (ii) fixed-income securities issued or guaranteed by
foreign governments. In addition, this portion of the Fund's portfolio will
consist of various other financial instruments such as forward foreign exchange
contracts, futures contracts and options.
 
    The Fund may also invest in securities of foreign issuers in the form of
American Depository Receipts ("ADRs"), European Depository Receipts ("EDRs") or
other similar securities convertible into securities of foreign issuers. These
securities may not necessarily be denominated in the same currency as the
securities into which they may be converted. ADRs are receipts typically issued
by a United States bank or trust company evidencing ownership of the underlying
securities. EDRs are European receipts evidencing a similar arrangement.
Generally, ADRs, in registered form, are designed for use in the United States
securities markets and EDRs, in bearer form, are designed for use in European
securities markets.
 
    In constructing its portfolio, the Fund will utilize an
investment/decision-making process that primarily emphasizes stock research and
selection, in combination with quantitative analysis to provide a broad-based
exposure to the universe of small capitalization stocks. The Fund's long-term
perspective will be implemented by searching for securities of companies with
long-term growth prospects, attractive valuation comparisons and adequate market
liquidity.
 
    The securities selected for purchase by the Fund's Sub-Advisor will be
biased toward longer-term price appreciation potential. The Sub-Advisor's
fundamental analysis is strongly value-driven. The stocks the Sub-Advisor finds
attractive will generally have valuations lower than the Sub-Advisor's
perception of their fundamental value, as reflected in price-to-cash flow,
price-to-book ratios or other stock valuation measures.
 
    There may be periods during which, in the opinion of the Investment Manager
or Sub-Advisor, market conditions warrant reduction of some or all of the Fund's
securities holdings. During such periods, the Fund may adopt a temporary
"defensive" posture in which greater than 35% of its net assets are invested in
cash or money market instruments. Money market instruments in which the Fund may
invest are securities issued or guaranteed by the U.S. Government (Treasury
bills, notes and bonds, including zero coupon securities); bank obligations
(such as certificates of deposit and bankers' acceptances); Yankee instruments;
Eurodollar certificates of deposit; obligations of savings institutions; fully
insured certificates of deposit; and commercial paper rated within the two
highest grades by Moody's or S&P or, if not rated, are issued by a company
having an outstanding debt issue rated at least AA by S&P or Aa by Moody's.
 
RISK CONSIDERATIONS AND INVESTMENT PRACTICES
 
    SMALL-CAP STOCKS.  Investing in lesser-known, smaller capitalized companies
may involve greater risk of volatility of the Fund's net asset value than is
customarily associated with investing in larger, more established companies.
There is typically less publicly available information concerning foreign and
smaller companies than for domestic and larger, more established companies. Some
small companies have limited product lines, distribution channels and financial
and managerial resources and tend to concentrate on fewer geographic markets
than do larger companies. Also, because smaller companies normally have fewer
shares outstanding than larger companies and trade less frequently, it may be
more difficult for the Fund to buy
 
                                       11
<PAGE>
and sell significant amounts of such shares without an unfavorable impact on
prevailing market prices. Some of the companies in which the Fund may invest may
distribute, sell or produce products which have recently been brought to market
and may be dependent on key personnel with varying degrees of experience.
 
    FOREIGN SECURITIES.  Foreign securities investments may be affected by
changes in currency rates or exchange control regulations, changes in
governmental administration or economic or monetary policy (in the United States
and abroad) or changed circumstances in dealings between nations. Fluctuations
in the relative rates of exchange between different currencies will affect the
value of the Fund's investments denominated in foreign currency. Changes in
foreign currency exchange rates relative to the U.S. dollar will affect the U.S.
dollar value of the Fund's assets denominated in that currency and thereby
impact upon the Fund's total return on such assets.
 
    Foreign currency exchange rates are determined by forces of supply and
demand on the foreign exchange markets. These forces are themselves affected by
the international balance of payments and other economic and financial
conditions, government intervention, speculation and other factors. Moreover,
foreign currency exchange rates may be affected by the regulatory control of the
exchanges on which the currencies trade. The foreign currency transactions of
the Fund will be conducted on a spot basis or through forward foreign currency
exchange contracts (described below). The Fund will incur certain costs in
connection with these currency transactions.
 
    Investments in foreign securities will also occasion risks relating to
political and economic developments abroad, including the possibility of
expropriations or confiscatory taxation, limitations on the use or transfer of
Fund assets and any effects of foreign social, economic or political
instability. Foreign companies are not subject to the regulatory requirements of
U.S. companies and, as such, there may be less publicly available information
about such companies. Moreover, foreign companies are not subject to uniform
accounting, auditing and financial reporting standards and requirements
comparable to those applicable to U.S. companies.
 
    Securities of foreign issuers may be less liquid than comparable securities
of U.S. issuers and, as such, their price changes may be more volatile.
Furthermore, foreign exchanges and broker-dealers are generally subject to less
government and exchange scrutiny and regulation than their American
counterparts. Brokerage commissions, dealer concessions and other transaction
costs may be higher on foreign markets than in the U.S. In addition, differences
in clearance and settlement procedures on foreign markets may occasion delays in
settlements of the Fund's trades effected in such markets. As such, the
inability to dispose of portfolio securities due to settlement delays could
result in losses to the Fund due to subsequent declines in value of such
securities and the inability of the Fund to make intended security purchases due
to settlement problems could result in a failure of the Fund to make potentially
advantageous investments.
 
    Many European countries are about to adopt a single European currency, the
euro (the "Euro Conversion"). The consequences of the Euro Conversion for
foreign exchange rates, interest rates and the value of European securities
eligible for purchase by the Fund are presently unclear. Such consequences may
adversely affect the value and/or increase the volatility of securities held by
the Fund.
 
    LOWER-RATED CONVERTIBLE SECURITIES.  The Fund may invest a portion of its
assets (up to 35% of its net assets) in lower-rated convertible securities. Most
convertible securities in which the Fund may invest are not rated; when rated,
such ratings will generally be below investment grade. Securities below
investment grade are the equivalent of high yield, high risk bonds, commonly
known as "junk bonds." Investment grade is generally considered to be debt
securities rated BBB or higher by Standard & Poor's Corporation ("S&P") or Baa
or higher
 
                                       12
<PAGE>
by Moody's Investors Service, Inc. ("Moody's"). However, the Fund will not
invest in debt securities that are in default in payment of principal or
interest.
 
    Because of the special nature of the Fund's permitted investments in lower
rated debt securities, the Investment Manager and Sub-Advisor must take account
of certain special considerations in assessing the risks associated with such
investments. The prices of lower rated securities have been found to be less
sensitive to changes in prevailing interest rates than higher rated investments,
but are likely to be more sensitive to adverse economic changes or individual
corporate developments. During an economic downturn or substantial period of
rising interest rates, highly leveraged issuers may experience financial stress
which would adversely affect their ability to service their principal and
interest payment obligations, to meet their projected business goals or to
obtain additional financing. If the issuer of a fixed-income security owned by
the Fund defaults, the Fund may incur additional expenses to seek recovery. In
addition, periods of economic uncertainty and change can be expected to result
in an increased volatility of market prices of lower rated securities and a
corresponding volatility in the net asset value of a share of the Fund.
 
    REPURCHASE AGREEMENTS.  The Fund may enter into repurchase agreements, which
may be viewed as a type of secured lending by the Fund, and which typically
involve the acquisition by the Fund of debt securities, from a selling financial
institution such as a bank, savings and loan association or broker-dealer. The
agreement provides that the Fund will sell back to the institution, and that the
institution will repurchase, the underlying security at a specified price and at
a fixed time in the future, usually not more than seven days from the date of
purchase. While repurchase agreements involve certain risks not associated with
direct investments in debt securities, including the risks of default or
bankruptcy of the selling financial institution, the Fund follows procedures to
minimize such risks. These procedures include effecting repurchase transactions
only with large, well-capitalized and well-established financial institutions
and maintaining adequate collateralization.
 
    REVERSE REPURCHASE AGREEMENTS AND DOLLAR ROLLS.  The Fund may also use
reverse repurchase agreements and dollar rolls as part of its investment
strategy. Reverse repurchase agreements involve sales by the Fund of portfolio
assets concurrently with an agreement by the Fund to repurchase the same assets
at a later date at a fixed price. The Fund may enter into dollar rolls in which
the Fund sells securities and simultaneously contracts to repurchase
substantially similar (same type and coupon) securities on a specified future
date. Reverse repurchase agreements and dollar rolls involve the risk that the
market value of the securities the Fund is obligated to repurchase under the
agreement may decline below the repurchase price. In the event the buyer of
securities under a reverse repurchase agreement or dollar roll files for
bankruptcy or becomes insolvent, the Fund's use of proceeds of the agreement may
be restricted pending a determination by the other party, or its trustee or
receiver, whether to enforce the Fund's obligation to repurchase the securities.
Reverse Repurchase agreements and dollar rolls are speculative techniques
involving leverage, and are considered borrowings by the Fund.
 
    WHEN-ISSUED AND DELAYED DELIVERY SECURITIES AND FORWARD COMMITMENTS.  From
time to time, in the ordinary course of business, the Fund may purchase
securities on a when-issued or delayed delivery basis or may purchase or sell
securities on a forward commitment basis. When such transactions are negotiated,
the price is fixed at the time of the commitment, but delivery and payment can
take place a month or more after the date of the commitment. There is no overall
limit on the percentage of the Fund's assets which may be committed to the
purchase of securities on a when-issued, delayed delivery or forward commitment
basis. An increase in the percentage of the Fund's assets committed to the
purchase of securities on a when-issued, delayed delivery or forward commitment
basis may increase the volatility of the Fund's net asset value.
 
                                       13
<PAGE>
An increase in the percentage of the Fund's assets committed to the purchase of
securities on a when-issued or delayed delivery basis may increase the
volatility of the Fund's net asset value.
 
    WHEN, AS AND IF ISSUED SECURITIES.  The Fund may purchase securities on a
"when, as and if issued" basis under which the issuance of the security depends
upon the occurrence of a subsequent event, such as approval of a merger,
corporate reorganization, leveraged buyout or debt restructuring. If the
anticipated event does not occur and the securities are not issued, the Fund
will have lost an investment opportunity. There is no overall limit on the
percentage of the Fund's assets which may be committed to the purchase of
securities on a "when, as and if issued" basis. An increase in the percentage of
the Fund's assets committed to the purchase of securities on a "when, as and if
issued" basis may increase the volatility of its net asset value.
 
    PRIVATE PLACEMENTS.  The Fund may invest up to 5% of its total assets in
securities which are subject to restrictions on resale because they have not
been registered under the Securities Act of 1933, as amended (the "Securities
Act"), or which are otherwise not readily marketable. (Securities eligible for
resale pursuant to Rule 144A under the Securities Act, and determined to be
liquid pursuant to the procedures discussed in the following paragraph, are not
subject to the foregoing restriction.) These securities are generally referred
to as private placements or restricted securities. Limitations on the resale of
such securities may have an adverse effect on their marketability, and may
prevent the Fund from disposing of them promptly at reasonable prices. The Fund
may have to bear the expense of registering such securities for resale and the
risk of substantial delays in effecting such registration.
 
    The Securities and Exchange Commission has adopted Rule 144A under the
Securities Act, which permits the Fund to sell restricted securities to
qualified institutional buyers without limitation. The Investment Manager,
pursuant to procedures adopted by the Trustees of the Fund, will make a
determination as to the liquidity of each restricted security purchased by the
Fund. If a restricted security is determined to be "liquid," such security will
not be included within the category "illiquid securities," which under current
policy may not exceed 15% of the Fund's net assets. However, investing in Rule
144A securities could have the effect of increasing the level of Fund
illiquidity to the extent the Fund, at a particular point in time, may be unable
to find qualified institutional buyers interested in purchasing such securities.
 
    ZERO COUPON SECURITIES.  A portion of the fixed-income securities purchased
by the Fund may be zero coupon securities. Such securities are purchased at a
discount from their face amount, giving the purchaser the right to receive their
full value at maturity. The interest earned on such securities is, implicitly,
automatically compounded and paid out at maturity. While such compounding at a
constant rate eliminates the risk of receiving lower yields upon reinvestment of
interest if prevailing interest rates decline, the owner of a zero coupon
security will be unable to participate in higher yields upon reinvestment of
interest received on interest-paying securities if prevailing interest rates
rise.
 
    A zero coupon security pays no interest to its holder during its life.
Therefore, to the extent the Fund invests in zero coupon securities, it will not
receive current cash available for distribution to shareholders. In addition,
zero coupon securities are subject to substantially greater price fluctuations
during periods of changing prevailing interest rates than are comparable
securities which pay interest on a current basis. Current federal tax law
requires that a holder (such as the Fund) of a zero coupon security accrue a
portion of the discount at which the security was purchased as income each year
even though the Fund receives no interest payments in cash on the security
during the year.
 
    OPTIONS AND FUTURES TRANSACTIONS.  The Fund may purchase and sell (write)
call and put options on (i) portfolio securities which are denominated in
 
                                       14
<PAGE>
either U.S. dollars or foreign currencies; (ii) stock indexes; and (iii) the
U.S. dollar and foreign currencies. Such options are or may in the future be
listed on several U.S. and foreign securities exchanges or are written in
over-the-counter transactions ("OTC options"). OTC options are purchased from or
sold (written) to dealers or financial institutions which have entered into
direct agreements with the Fund.
 
    The Fund is permitted to write covered call options on portfolio securities
and the U.S. dollar and foreign currencies, without limit, in order to hedge
against the decline in the value of a security or currency in which such
security is denominated (although such hedge is limited to the value of the
premium received) and to close out long call option positions. The Fund may
write covered put options, under which the Fund incurs an obligation to buy the
security (or currency) underlying the option from the purchaser of the put at
the option's exercise price at any time during the option period, at the
purchaser's election.
 
    The Fund may purchase listed and OTC call and put options in amounts
equalling up to 5% of its total assets. The Fund may purchase call options to
close out a covered call position or to protect against an increase in the price
of a security it anticipates purchasing or, in the case of call options on a
foreign currency, to hedge against an adverse exchange rate change of the
currency in which the security it anticipates purchasing is denominated
vis-a-vis the currency in which the exercise price is denominated. The Fund may
purchase put options on securities which it holds in its portfolio to protect
itself against a decline in the value of the security and to close out written
put positions in a manner similar to call option closing purchase transactions.
There are no other limits on the Fund's ability to purchase call and put
options.
 
    The Fund may purchase and sell futures contracts that are currently traded,
or may in the future be traded, on U.S. and foreign commodity exchanges on
underlying portfolio securities, on any currency ("currency" futures), on U.S.
and foreign fixed-income securities ("interest rate" futures) and on such
indexes of U.S. or foreign equity or fixed-income securities as may exist or
come into being ("index" futures). The Fund may purchase or sell interest rate
futures contracts for the purpose of hedging some or all of the value of its
portfolio securities (or anticipated portfolio securities) against changes in
prevailing interest rates. The Fund may purchase or sell index futures contracts
for the purpose of hedging some or all of its portfolio securities (or
anticipated portfolio securities) against changes in their prices (or the
currency in which they are denominated). As a futures contract purchaser, the
Fund incurs an obligation to take delivery of a specified amount of the
obligation underlying the contract at a specified time in the future for a
specified price. As a seller of a futures contract, the Fund incurs an
obligation to deliver the specified amount of the underlying obligation at a
specified time in return for an agreed upon price.
 
    The Fund also may purchase and write call and put options on futures
contracts which are traded on an exchange and enter into closing transactions
with respect to such options to terminate an existing position.
 
    New futures contracts, options and other financial products and various
combinations thereof continue to be developed. The Fund may invest in any such
futures, options or products as may be developed, to the extent consistent with
its investment objective and applicable regulatory requirements.
 
    RISKS OF OPTIONS AND FUTURES TRANSACTIONS. The Fund may close out its
position as writer of an option, or as a buyer or seller of a futures contract,
only if a liquid secondary market exists for options or futures contracts of
that series. There is no assurance that such a market will exist, particularly
in the case of OTC options, as such options may generally only be closed out by
entering into a closing purchase transaction with the purchasing dealer. Also,
exchanges may limit the amount by which the price of many futures contracts may
move on any day. If
 
                                       15
<PAGE>
the price moves equal the daily limit on successive days, then it may prove
impossible to liquidate a futures position until the daily limit moves have
ceased.
 
    Futures contracts and options transactions may be considered speculative in
nature and may involve greater risks than those customarily assumed by other
investment companies which do not invest in such instruments. One such risk is
that the Investment Manager or Sub-Advisor could be incorrect in its
expectations as to the direction or extent of various interest rate or price
movements or the time span within which the movements take place. For example,
if the Fund sold futures contracts for the sale of securities in anticipation of
an increase in interest rates, and then interest rates went down instead,
causing bond prices to rise, the Fund would lose money on the sale. Another risk
which will arise in employing futures contracts to protect against the price
volatility of portfolio securities is that the prices of securities, currencies
and indexes subject to futures contracts (and thereby the futures contract
prices) may correlate imperfectly with the behavior of the U.S. dollar cash
prices of the Fund's portfolio securities and their denominated currencies. See
the Statement of Additional Information for a further discussion of risks.
 
    FORWARD FOREIGN CURRENCY EXCHANGE CONTRACTS. The Fund may enter into forward
foreign currency exchange contracts ("forward contracts") in connection with its
foreign securities investments.
 
    A forward contract involves an obligation to purchase or sell a currency at
a future date, which may be any fixed number of days from the date of the
contract agreed upon by the parties, at a price set at the time of the contract.
The Fund may enter into forward contracts as a hedge against fluctuations in
future foreign exchange rates.
 
    The Fund will enter into forward contracts under various circumstances. When
the Fund enters into a contract for the purchase or sale of a security
denominated in a foreign currency, it may, for example, desire to "lock in" the
price of the security in U.S. dollars or some other foreign currency which the
Fund is temporarily holding in its portfolio. By entering into a forward
contract for the purchase or sale, for a fixed amount of dollars or other
currency, of the amount of foreign currency involved in the underlying security
transactions, the Fund will be able to protect itself against a possible loss
resulting from an adverse change in the relationship between the U.S. dollar or
other currency which is being used for the security purchase (by the Fund or the
counterparty) and the foreign currency in which the security is denominated
during the period between the date on which the security is purchased or sold
and the date on which payment is made or received.
 
    At other times, when, for example, the Fund's Investment Manager or
Sub-Advisor believes that a particular foreign currency may suffer a substantial
decline against the U.S. dollar or some other foreign currency, the Fund may
enter into a forward contract to sell, for a fixed amount of dollars or other
currency, the amount of foreign currency approximating the value of some or all
of the Fund's securities holdings (or securities which the Fund has purchased
for its portfolio) denominated in such foreign currency. Under identical
circumstances, the Fund may enter into a forward contract to sell, for a fixed
amount of U.S. dollars or other currency, an amount of foreign currency other
than the currency in which the securities to be hedged are denominated
approximating the value of some or all of the portfolio securities to be hedged.
This method of hedging, called "cross-hedging," will be selected by the
Investment Manager or Sub-Advisor when it is determined that the foreign
currency in which the portfolio securities are denominated has insufficient
liquidity or is trading at a discount as compared with some other foreign
currency with which it tends to move in tandem.
 
    In addition, when the Fund's Investment Manager or Sub-Advisor anticipates
purchasing securities at some time in the future, and wishes to lock in the
current exchange rate of the currency in which those securities are denominated
against the U.S.
 
                                       16
<PAGE>
dollar or some other foreign currency, the Fund may enter into a forward
contract to purchase an amount of currency equal to some or all of the value of
the anticipated purchase, for a fixed amount of U.S. dollars or other currency.
The Fund may, however, close out the forward contract without purchasing the
security which was the subject of the "anticipatory" hedge.
 
    In all of the above circumstances, if the currency in which the Fund's
securities holdings (or anticipated portfolio securities) are denominated rises
in value with respect to the currency which is being purchased (or sold), the
Fund will have realized fewer gains than had the Fund not entered into the
forward contracts. Moreover, the precise matching of the forward contract
amounts and the value of the securities involved will not generally be possible,
since the future value of such securities in foreign currencies will change as a
consequence of market movements in the value of those securities between the
date the forward contract is entered into and the date it matures. The Fund is
not required to enter into such transactions with regard to its foreign
currency-denominated securities and will not do so unless deemed appropriate by
the Investment Manager or Sub-Advisor. The Fund generally will not enter into a
forward contract with a term of greater than one year, although it may enter
into forward contracts for periods of up to five years. The Fund may be limited
in its ability to enter into hedging transactions involving forward contracts by
the Internal Revenue Code requirements relating to qualification as a regulated
investment company (see "Dividends, Distributions and Taxes").
 
    RIGHTS AND WARRANTS.  The Fund may acquire rights and/or warrants which are
attached to other securities in its portfolio, or which are issued as a
distribution by the issuer of a security held in its portfolio. Rights and/or
warrants are, in effect, options to purchase equity securities at a specific
price, generally valid for a specific period of time, and have no voting rights,
pay no dividends and have no rights with respect to the corporation issuing
them.
 
    CONVERTIBLE SECURITIES.  The Fund may acquire, through purchase or a
distribution by the issuer of a security held in its portfolio, a fixed-income
security which is convertible into common stock of the issuer. Convertible
securities rank senior to common stocks in a corporation's capital structure
and, therefore, entail less risk than the corporation's common stock. The value
of a convertible security is a function of its "investment value" (its value as
if it did not have a conversion privilege), and its "conversion value" (the
security's worth if it were to be exchanged for the underlying security, at
market value, pursuant to its conversion privilege).
 
    To the extent that a convertible security's investment value is greater than
its conversion value, its price will be primarily a reflection of such
investment value and its price will be likely to increase when interest rates
fall and decrease when interest rates rise, as with a fixed-income security (the
credit standing of the issuer and other factors may also have an effect on the
convertible security's value). If the conversion value exceeds the investment
value, the price of the convertible security will rise above its investment
value and, in addition, will sell at some premium over its conversion value.
(This premium represents the price investors are willing to pay for the
privilege of purchasing a fixed-income security with a possibility of capital
appreciation due to the conversion privilege.) At such times the price of the
convertible security will tend to fluctuate directly with the price of the
underlying equity security. A portion of the convertible securities in which the
Fund may invest may be unrated or, if rated, rated below investment grade by a
nationally recognized statistical rating organization.
 
    YEAR 2000.  The investment management services provided to the Fund by the
Investment Manager and the Sub-Advisor and the services provided to shareholders
by the Distributor and the Transfer Agent depend on the smooth functioning of
their computer systems. Many computer software systems in use today cannot
recognize the year 2000, but revert to 1900 or some other date, due to the
 
                                       17
<PAGE>
manner in which dates were encoded and calculated. That failure could have a
negative impact on the handling of securities trades, pricing and account
services. The Investment Manager, the Sub-Advisor, the Distributor and the
Transfer Agent have been actively working on necessary changes to their own
computer systems to prepare for the year 2000 and expect that their systems will
be adapted before that date, but there can be no assurance that they will be
successful, or that interaction with other non-complying computer systems will
not impair their services at that time. In addition, it is possible that the
markets for securities in which the Fund invests may be detrimentally affected
by computer failures throughout the financial services industry beginning
January 1, 2000. Improperly functioning trading systems may result in settlement
problems and liquidity issues. In addition, corporate and governmental data
processing errors may result in production problems for individual companies and
overall economic uncertainties. Earnings of individual issuers will be affected
by remediation costs, which may be substantial and may be reported
inconsistently in U.S. and foreign financial statements. Accordingly, the Fund's
investments may be adversely affected.
 
PORTFOLIO MANAGEMENT
 
    The Fund's portfolio is actively managed by its Investment Manager and the
Sub-Advisor with a view to achieving the Fund's investment objective. In
determining which securities to purchase for the Fund or hold in the Fund's
portfolio, the Investment Manager and the Sub-Advisor will rely on information
from various sources, including research, analysis and appraisals of brokers and
dealers, including Dean Witter Reynolds, Inc., Morgan Stanley & Co. Incorporated
and other broker-dealers that are affiliates of the Investment Manager, and
others regarding economic developments and interest rate trends, and the
Investment Manager's and Sub-Advisor's own analysis of factors they deem
relevant. The Fund's portfolio is managed by a team of portfolio managers
located in the Sub-Advisor's offices in London, Amsterdam, Singapore and Tokyo.
MSAM's portfolio management team has been responsible for managing the Fund
since December 1, 1997.
 
    Personnel of the Investment Manager and Sub-Advisor have substantial
experience in the use of the investment techniques described above under the
heading "Options and Futures Transactions," which techniques require skills
different from those needed to select the portfolio securities underlying
various options and futures contracts.
 
    Orders for transactions in portfolio securities and commodities may be
placed for the Fund with a number of brokers and dealers, including Dean Witter
Reynolds Inc., Morgan Stanley & Co. Incorporated or other broker-dealer
affiliates of the Investment Manager and the Sub-Advisor. Pursuant to an order
of the Securities and Exchange Commission, the Fund may effect principal
transactions in certain money market instruments with Dean Witter Reynolds Inc.
In addition, the Fund may incur brokerage commissions on transactions conducted
through Dean Witter Reynolds Inc., Morgan Stanley & Co. Incorporated and other
broker-dealers that are affiliates of the Investment Manager and the
Sub-Advisor.
 
   
    Although the Fund does not intend to engage in short-term trading, it may
sell portfolio securities without regard to the length of time they have been
held when such sale will, in the opinion of the Investment Manager or
Sub-Advisor, contribute to the Fund's investment objective. It is not
anticipated that the Fund's portfolio turnover rate will exceed 100% in any one
year. For the fiscal year ended May 31, 1998, the Fund had a portfolio turnover
rate of 178%. A portfolio turnover rate in excess of 100% may be considered high
and the Fund will incur correspondingly higher transaction costs. In addition,
high portfolio turnover may result in more capital gains which would be taxable
to the Fund's shareholders. (See "Dividends, Distributions and Taxes.")
    
 
    The expenses of the Fund relating to its portfolio management are likely to
be greater than those
 
                                       18
<PAGE>
incurred by other investment companies investing primarily in securities issued
by domestic issuers as custodial costs, brokerage commissions and other
transaction charges related to investing in foreign markets are generally higher
than in the United States.
 
INVESTMENT RESTRICTIONS
- --------------------------------------------------------------------------------
 
    The investment restrictions listed below are among the restrictions which
have been adopted by the Fund as fundamental policies. Under the Investment
Company Act, a fundamental policy may not be changed without the vote of a
majority of the outstanding voting securities of the Fund, as defined in the
Act. For purposes of the following limitations: (i) all percentage limitations
apply immediately after a purchase or initial investment, and (ii) any
subsequent change in any applicable percentage resulting from market
fluctuations or other changes in total or net assets does not require
elimination of any security from the portfolio.
 
    The Fund may not:
 
   1. Invest 25% or more of the value of its total assets in securities of
issuers in any one industry. This restriction does not apply to obligations
issued or guaranteed by the United States Government, its agencies or
instrumentalities.
 
   2. Invest more than 5% of the value of its total assets in securities of
issuers having a record, together with predecessors, of less than three years of
continuous operation. This restriction shall not apply to any obligation issued
or guaranteed by the United States Government, its agencies or
instrumentalities.
 
    In addition, as a non-fundamental policy, the Fund may not, as to 75% of its
total assets, purchase more than 10% of the voting securities of any issuer.
 
    Notwithstanding any other investment policy or restriction, the Fund may
seek to achieve its investment objective by investing all or substantially all
of its assets in another investment company having substantially the same
investment objective and policies as the Fund.
 
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
GENERAL
 
    The Fund offers each class of its shares for sale to the public on a
continuous basis. Pursuant to a Distribution Agreement between the Fund and
Morgan Stanley Dean Witter Distributors Inc. ("MSDW Distributors" or the
"Distributor"), an affiliate of the Investment Manager, shares of the Fund are
distributed by the Distributor and offered by Dean Witter Reynolds Inc. ("DWR"),
a selected dealer and subsidiary of Morgan Stanley Dean Witter & Co., and other
dealers who have entered into selected dealer agreements with the Distributor
("Selected Broker-Dealers"). It is anticipated that DWR will undergo a change of
corporate name which is expected to incorporate the brand name of "Morgan
Stanley Dean Witter," pending approval of various regulatory authorities. The
principal executive office of the Distributor is located at Two World Trade
Center, New York, New York 10048.
 
    The Fund offers four classes of shares (each, a "Class"). Class A shares are
sold to investors with an initial sales charge that declines to zero for larger
purchases; however, Class A shares sold without an initial sales charge are
subject to a contingent deferred sales charge ("CDSC") of 1.0% if redeemed
within one year of purchase, except for certain specific circumstances. Class B
shares are sold without an initial sales charge but are subject to a CDSC
(scaled down from 5.0% to 1.0%) payable
 
                                       19
<PAGE>
upon most redemptions within six years after purchase. (Class B shares purchased
by certain qualified plans are subject to a CDSC scaled down from 2.0% to 1.0%
if redeemed within three years after purchase.) Class C shares are sold without
an initial sales charge but are subject to a CDSC of 1.0% on most redemptions
made within one year after purchase. Class D shares are sold without an initial
sales charge or CDSC and are available only to investors meeting an initial
investment minimum of $5 million ($25 million for certain qualified plans), and
to certain other limited categories of investors. At the discretion of the Board
of Trustees of the Fund, Class A shares may be sold to categories of investors
in addition to those set forth in this prospectus at net asset value without a
front-end sales charge, and Class D shares may be sold to certain other
categories of investors, in each case as may be described in the then current
prospectus of the Fund. See "Alternative Purchase Arrangements-- Selecting a
Particular Class" for a discussion of factors to consider in selecting which
Class of shares to purchase.
 
    The minimum initial purchase is $1,000 for each Class of shares, although
Class D shares are only available to persons investing $5 million ($25 million
for certain qualified plans), or more and to certain other limited categories of
investors. For the purpose of meeting the minimum $5 million (or $25 million)
initial investment for Class D shares, and subject to the $1,000 minimum initial
investment for each Class of the Fund, an investor's existing holdings of Class
A shares of the Fund and other Morgan Stanley Dean Witter Funds that are
multiple class funds ("Morgan Stanley Dean Witter Multi-Class Funds") and shares
of Morgan Stanley Dean Witter Funds sold with a front-end sales charge ("FSC
Funds") and concurrent investments in Class D shares of the Fund and other
Morgan Stanley Dean Witter Multi-Class Funds will be aggregated. Subsequent
purchases of $100 or more may be made by sending a check, payable to Morgan
Stanley Dean Witter International SmallCap Fund, directly to Morgan Stanley Dean
Witter Trust FSB (the "Transfer Agent" or "MSDW Trust") at P.O. Box 1040, Jersey
City, NJ 07303 or by contacting a Morgan Stanley Dean Witter Financial Advisor
or other Selected Broker-Dealer representative. When purchasing shares of the
Fund, investors must specify whether the purchase is for Class A, Class B, Class
C or Class D shares. If no Class is specified, the Transfer Agent will not
process the transaction until the proper Class is identified. The minimum
initial purchase in the case of investments through EasyInvest-SM-, an automatic
purchase plan (see "Shareholder Services"), is $100, provided that the schedule
of automatic investments will result in investments totalling at least $1,000
within the first twelve months. The minimum initial purchase in the case of an
"Education IRA" is $500, if the Distributor has reason to believe that
additional investments will increase the investment in the account to $1,000
within three years. In the case of investments pursuant to (i) Systematic
Payroll Deduction Plans (including Individual Retirement Plans), (ii) the MSDW
Advisors mutual fund asset allocation program and (iii) fee-based programs
approved by the Distributor, pursuant to which participants pay an asset based
fee for services in the nature of investment advisory, administrative and/or
brokerage services, the Fund, in its discretion, may accept investments without
regard to any minimum amounts which would otherwise be required, provided, in
the case of Systematic Payroll Deduction Plans, that the Distributor has reason
to believe that additional investments will increase the investment in all
accounts under such Plans to at least $1,000. Certificates for shares purchased
will not be issued unless a request is made by the shareholder in writing to the
Transfer Agent.
 
    Shares of the Fund are sold through the Distributor on a normal three
business day settlement basis; that is, payment is due on the third business day
(settlement date) after the order is placed with the Distributor. Shares of the
Fund purchased through the Distributor are entitled to any dividends declared
beginning on the next business day following settlement date. Since DWR and
other Selected
 
                                       20
<PAGE>
Broker-Dealers forward investors' funds on settlement date, they will benefit
from the temporary use of the funds if payment is made prior thereto. Shares
purchased through the Transfer Agent are entitled to any dividends declared
beginning on the next business day following receipt of an order. As noted
above, orders placed directly with the Transfer Agent must be accompanied by
payment. Investors will be entitled to receive dividends and capital gains
distributions if their order is received by the close of business on the day
prior to the record date for such dividends and distributions. Sales personnel
of a Selected Broker-Dealer are compensated for selling shares of the Fund at
the time of their sale by the Distributor or any of its affiliates and/or the
Selected Broker-Dealer. In addition, some sales personnel of the Selected
Broker-Dealer will receive various types of non-cash compensation as special
sales incentives, including trips, educational and/or business seminars and
merchandise. The Fund and the Distributor reserve the right to reject any
purchase orders.
 
ALTERNATIVE PURCHASE ARRANGEMENTS
 
    The Fund offers several Classes of shares to investors designed to provide
them with the flexibility of selecting an investment best suited to their needs.
The general public is offered three Classes of shares: Class A shares, Class B
shares and Class C shares, which differ principally in terms of sales charges
and rate of expenses to which they are subject. A fourth Class of shares, Class
D shares, is offered only to limited categories of investors (see "No Load
Alternative--Class D Shares" below).
 
    Each Class A, Class B, Class C or Class D share of the Fund represents an
identical interest in the investment portfolio of the Fund except that Class A,
Class B and Class C shares bear the expenses of the ongoing shareholder service
fees, Class B and Class C shares bear the expenses of the ongoing distribution
fees and Class A, Class B and Class C shares which are redeemed subject to a
CDSC bear the expense of the additional incremental distribution costs resulting
from the CDSC applicable to shares of those Classes. The ongoing distribution
fees that are imposed on Class A, Class B and Class C shares will be imposed
directly against those Classes and not against all assets of the Fund and,
accordingly, such charges against one Class will not affect the net asset value
of any other Class or have any impact on investors choosing another sales charge
option. See "Plan of Distribution" and "Redemptions and Repurchases."
 
    Set forth below is a summary of the differences between the Classes and the
factors an investor should consider when selecting a particular Class. This
summary is qualified in its entirety by detailed discussion of each Class that
follows this summary.
 
    CLASS A SHARES.  Class A shares are sold at net asset value plus an initial
sales charge of up to 5.25%. The initial sales charge is reduced for certain
purchases. Investments of $1 million or more (and investments by certain other
limited categories of investors) are not subject to any sales charges at the
time of purchase but are subject to a CDSC of 1.0% on redemptions made within
one year after purchase, except for certain specific circumstances. Class A
shares are also subject to a 12b-1 fee of up to 0.25% of the average daily net
assets of the Class. See "Initial Sales Charge Alternative--Class A Shares."
 
    CLASS B SHARES.  Class B shares are offered at net asset value with no
initial sales charge but are subject to a CDSC (scaled down from 5.0% to 1.0%)
if redeemed within six years of purchase. (Class B shares purchased by certain
qualified plans are subject to a CDSC scaled down from 2.0% to 1.0% if redeemed
within three years after purchase.) This CDSC may be waived for certain
redemptions. Class B shares are also subject to an annual 12b-1 fee of 1.0% of
the lesser of: (a) the average daily aggregate gross sales of the Fund's Class B
shares since the inception of the Fund (not including reinvestments of dividends
or capital gains distributions), less the average daily aggregate net asset
value of the Fund's Class B shares redeemed since the Fund's inception upon
which a CDSC has been
 
                                       21
<PAGE>
imposed or waived, or (b) the average daily net assets of Class B. The Class B
shares' distribution fee will cause that Class to have higher expenses and pay
lower dividends than Class A or Class D shares.
 
    After approximately ten (10) years, Class B shares will convert
automatically to Class A shares of the Fund, based on the relative net asset
values of the shares of the two Classes on the conversion date. In addition, a
certain portion of Class B shares that have been acquired through the
reinvestment of dividends and distributions will be converted at that time. See
"Contingent Deferred Sales Charge Alternative--Class B Shares."
 
    CLASS C SHARES.  Class C shares are sold at net asset value with no initial
sales charge but are subject to a CDSC of 1.0% on redemptions made within one
year after purchase. This CDSC may be waived for certain redemptions. They are
subject to an annual 12b-1 fee of up to 1.0% of the average daily net assets of
the Class C shares. The Class C shares' distribution fee may cause that Class to
have higher expenses and pay lower dividends than Class A or Class D shares. See
"Level Load Alternative--Class C Shares."
 
    CLASS D SHARES.  Class D shares are available only to limited categories of
investors (see "No Load Alternative--Class D Shares" below). Class D shares are
sold at net asset value with no initial sales charge or CDSC. They are not
subject to any 12b-1 fees. See "No Load Alternative--Class D Shares."
 
    SELECTING A PARTICULAR CLASS.  In deciding which Class of Fund shares to
purchase, investors should consider the following factors, as well as any other
relevant facts and circumstances:
 
    The decision as to which Class of shares is more beneficial to an investor
depends on the amount and intended length of his or her investment. Investors
who prefer an initial sales charge alternative may elect to purchase Class A
shares. Investors qualifying for significantly reduced or, in the case of
purchases of $1 million or more, no initial sales charges may find Class A
shares particularly attractive because similar sales charge reductions are not
available with respect to Class B or Class C shares. Moreover, Class A shares
are subject to lower ongoing expenses than are Class B or Class C shares over
the term of the investment. As an alternative, Class B and Class C shares are
sold without any initial sales charge so the entire purchase price is
immediately invested in the Fund. Any investment return on these additional
investment amounts may partially or wholly offset the higher annual expenses of
these Classes. Because the Fund's future return cannot be predicted, however,
there can be no assurance that this would be the case.
 
    Finally, investors should consider the effect of the CDSC period and any
conversion rights of the Classes in the context of their own investment time
frame. For example, although Class C shares are subject to a significantly lower
CDSC upon redemptions, they do not, unlike Class B shares, convert into Class A
shares after approximately ten years, and, therefore, are subject to an ongoing
12b-1 fee of 1.0% (rather than the 0.25% fee applicable to Class A shares) for
an indefinite period of time. Thus, Class B shares may be more attractive than
Class C shares to investors with longer term investment outlooks. Other
investors, however, may elect to purchase Class C shares if, for example, they
determine that they do not wish to be subject to a front-end sales charge and
they are uncertain as to the length of time they intend to hold their shares.
 
    For the purpose of meeting the $5 million (or $25 million) minimum
investment amount for Class D shares, holdings of Class A shares in all Morgan
Stanley Dean Witter Multi-Class Funds, shares of FSC Funds and shares of Morgan
Stanley Dean Witter Funds for which such shares have been exchanged, will be
included together with the current investment amount.
 
    Sales personnel may receive different compensation for selling each Class of
shares. Investors should understand that the purpose of a CDSC is
 
                                       22
<PAGE>
the same as that of the initial sales charge in that the sales charges
applicable to each Class provide for the financing of the distribution of shares
of that Class.
 
    Set forth below is a chart comparing the sales charge, 12b-1 fees and
conversion options applicable to each Class of shares:
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------
                                              CONVERSION
  CLASS       SALES CHARGE     12b-1 FEE       FEATURE
<C>        <S>                 <C>         <C>
- -----------------------------------------------------------
    A      Maximum 5.25%         0.25%            No
           initial sales
           charge reduced for
           purchases of
           $25,000 and over;
           shares sold
           without an initial
           sales charge
           generally subject
           to a 1.0% CDSC
           during first year.
- -----------------------------------------------------------
    B      Maximum 5.0% CDSC      1.0%     B shares convert
           during the first                to A shares
           year decreasing to              automatically
           0 after six years               after approxi-
                                           mately ten years
- -----------------------------------------------------------
    C      1.0% CDSC during       1.0%            No
           first year
- -----------------------------------------------------------
    D             None            None            No
</TABLE>
 
    See "Purchase of Fund Shares" and "The Fund and its Management" for a
complete description of the sales charges and service and distribution fees for
each Class of shares and "Determination of Net Asset Value," "Dividends,
Distributions and Taxes" and "Shareholder Services--Exchange Privilege" for
other differences between the Classes of shares.
 
INITIAL SALES CHARGE ALTERNATIVE--
CLASS A SHARES
 
    Class A shares are sold at net asset value plus an initial sales charge. In
some cases, reduced sales charges may be available, as described below.
Investments of $1 million or more (and investments by certain other limited
categories of investors) are not subject to any sales charges at the time of
purchase but are subject to a CDSC of 1.0% on redemptions made within one year
after purchase (calculated from the last day of the month in which the shares
were purchased), except for certain specific circumstances. The CDSC will be
assessed on an amount equal to the lesser of the current market value or the
cost of the shares being redeemed. The CDSC will not be imposed (i) in the
circumstances set forth below in the section "Contingent Deferred Sales Charge
Alternative--Class B Shares--CDSC Waivers," except that the references to six
years in the first paragraph of that section shall mean one year in the case of
Class A shares, and (ii) in the circumstances identified in the section
"Additional Net Asset Value Purchase Options" below. Class A shares are also
subject to an annual 12b-1 fee of up to 0.25% of the average daily net assets of
the Class.
 
    The offering price of Class A shares will be the net asset value per share
next determined following receipt of an order (see "Determination of Net Asset
Value" below), plus a sales charge (expressed as a percentage of the offering
price) on a single transaction as shown in the following table:
 
<TABLE>
<CAPTION>
                                          SALES CHARGE
                           ------------------------------------------
                              PERCENTAGE OF          APPROXIMATE
        AMOUNT OF            PUBLIC OFFERING    PERCENTAGE OF AMOUNT
   SINGLE TRANSACTION             PRICE               INVESTED
- -------------------------  -------------------  ---------------------
<S>                        <C>                  <C>
Less than $25,000........           5.25%                 5.54%
$25,000 but less
     than $50,000........           4.75%                 4.99%
$50,000 but less
     than $100,000.......           4.00%                 4.17%
$100,000 but less
     than $250,000.......           3.00%                 3.09%
$250,000 but less
     than $1 million.....           2.00%                 2.04%
$1 million and over......              0                     0
</TABLE>
 
    Upon notice to all Selected Broker-Dealers, the Distributor may reallow up
to the full applicable sales charge as shown in the above schedule during
periods specified in such notice. During periods when 90% or more of the sales
charge is reallowed, such Selected Broker-Dealers may be deemed to be
underwriters as that term is defined in the Securities Act of 1933.
 
                                       23
<PAGE>
    The above schedule of sales charges is applicable to purchases in a single
transaction by, among others: (a) an individual; (b) an individual, his or her
spouse and their children under the age of 21 purchasing shares for his, her or
their own accounts; (c) a trustee or other fiduciary purchasing shares for a
single trust estate or a single fiduciary account; (d) a pension, profit-sharing
or other employee benefit plan qualified or non-qualified under Section 401 of
the Internal Revenue Code; (e) tax-exempt organizations enumerated in Section
501(c)(3) or (13) of the Internal Revenue Code; (f) employee benefit plans
qualified under Section 401 of the Internal Revenue Code of a single employer or
of employers who are "affiliated persons" of each other within the meaning of
Section 2(a)(3)(c) of the Act; and for investments in Individual Retirement
Accounts of employees of a single employer through Systematic Payroll Deduction
plans; or (g) any other organized group of persons, whether incorporated or not,
provided the organization has been in existence for at least six months and has
some purpose other than the purchase of redeemable securities of a registered
investment company at a discount.
 
    COMBINED PURCHASE PRIVILEGE.  Investors may have the benefit of reduced
sales charges in accordance with the above schedule by combining purchases of
Class A shares of the Fund in single transactions with the purchase of Class A
shares of other Morgan Stanley Dean Witter Multi-Class Funds and shares of FSC
Funds. The sales charge payable on the purchase of the Class A shares of the
Fund, the Class A shares of the other Morgan Stanley Dean Witter Multi-Class
Funds and the shares of the FSC Funds will be at their respective rates
applicable to the total amount of the combined concurrent purchases of such
shares.
 
    RIGHT OF ACCUMULATION.  The above persons and entities may benefit from a
reduction of the sales charges in accordance with the above schedule if the
cumulative net asset value of Class A shares purchased in a single transaction,
together with shares of the Fund and other Morgan Stanley Dean Witter Funds
previously purchased at a price including a front-end sales charge (including
shares of the Fund and other Morgan Stanley Dean Witter Funds acquired in
exchange for those shares, and including in each case shares acquired through
reinvestment of dividends and distributions), which are held at the time of such
transaction, amounts to $25,000 or more. If such investor has a cumulative net
asset value of shares of FSC Funds and Class A and Class D shares that, together
with the current investment amount, is equal to at least $5 million ($25 million
for certain qualified plans), such investor is eligible to purchase Class D
shares subject to the $1,000 minimum initial investment requirement of that
Class of the Fund. See "No Load Alternative--Class D Shares" below.
 
    The Distributor must be notified by DWR or a Selected Broker-Dealer or the
shareholder at the time a purchase order is placed that the purchase qualifies
for the reduced charge under the Right of Accumulation. Similar notification
must be made in writing by the dealer or shareholder when such an order is
placed by mail. The reduced sales charge will not be granted if: (a) such
notification is not furnished at the time of the order; or (b) a review of the
records of the Selected Broker-Dealer or the Transfer Agent fails to confirm the
investor's represented holdings.
 
    LETTER OF INTENT.  The foregoing schedule of reduced sales charges will also
be available to investors who enter into a written Letter of Intent providing
for the purchase, within a thirteen-month period, of Class A shares of the Fund
from DWR or other Selected Broker-Dealers. The cost of Class A shares of the
Fund or shares of other Morgan Stanley Dean Witter Funds which were previously
purchased at a price including a front-end sales charge during the 90-day period
prior to the date of receipt by the Distributor of the Letter of Intent, or of
Class A shares of the Fund or shares of other Morgan Stanley Dean Witter Funds
acquired in exchange for shares of such funds purchased during such period at a
price including a front-end sales charge, which
 
                                       24
<PAGE>
are still owned by the shareholder, may also be included in determining the
applicable reduction.
 
    ADDITIONAL NET ASSET VALUE PURCHASE OPTIONS. In addition to investments of
$1 million or more, Class A shares also may be purchased at net asset value by
the following:
 
    (1) trusts for which MSDW Trust (which is an affiliate of the Investment
Manager) provides discretionary trustee services;
 
    (2) persons participating in a fee-based program approved by the
Distributor, pursuant to which such persons pay an asset based fee for services
in the nature of investment advisory, administrative and/or brokerage services
(such investments are subject to all of the terms and conditions of such
programs, which may include termination fees, mandatory redemption upon
termination and such other circumstances as specified in the programs'
agreements, and restrictions on transferability of Fund shares);
 
    (3) employer-sponsored 401(k) and other plans qualified under Section 401(a)
of the Internal Revenue Code ("Qualified Retirement Plans") with at least 200
eligible employees and for which MSDW Trust serves as Trustee or DWR's
Retirement Plan Services serves as recordkeeper pursuant to a written
Recordkeeping Services Agreement;
 
    (4) Qualified Retirement Plans for which MSDW Trust serves as Trustee or
DWR's Retirement Plan Services serves as recordkeeper pursuant to a written
Recordkeeping Services Agreement whose Class B shares have converted to Class A
shares, regardless of the plan's asset size or number of eligible employees;
 
   (5) investors who are clients of a Morgan Stanley Dean Witter Financial
Advisor who joined Morgan Stanley Dean Witter from another investment firm
within six months prior to the date of purchase of Fund shares by such
investors, if the shares are being purchased with the proceeds from a redemption
of shares of an open-end proprietary mutual fund of the Financial Advisor's
previous firm which imposed either a front-end or deferred sales charge,
provided such purchase was made within sixty days after the redemption and the
proceeds of the redemption had been maintained in the interim in cash or a money
market fund; and
 
    (6) other categories of investors, at the discretion of the Board, as
disclosed in the then current prospectus of the Fund.
 
    No CDSC will be imposed on redemptions of shares purchased pursuant to
paragraphs (1), (2) or (5), above.
 
    For further information concerning purchases of the Fund's shares, contact
DWR or another Selected Broker-Dealer or consult the Statement of Additional
Information.
 
CONTINGENT DEFERRED SALES CHARGE
ALTERNATIVE--CLASS B SHARES
 
    Class B shares are sold at net asset value next determined without an
initial sales charge so that the full amount of an investor's purchase payment
may be immediately invested in the Fund. A CDSC, however, will be imposed on
most Class B shares redeemed within six years after purchase. The CDSC will be
imposed on any redemption of shares if after such redemption the aggregate
current value of a Class B account with the Fund falls below the aggregate
amount of the investor's purchase payments for Class B shares made during the
six years (or, in the case of shares held by certain Qualified Retirement Plans,
three years) preceding the redemption. In addition, Class B shares are subject
to an annual 12b-1 fee of 1.0% of the lesser of: (a) the average daily aggregate
gross sales of the Fund's Class B shares since the inception of the Fund (not
including reinvestments of dividends or capital gains distributions), less the
average daily aggregate net asset value of the Fund's Class B shares redeemed
since the Fund's inception upon which a CDSC has been imposed or waived, or (b)
the average daily net assets of Class B.
 
                                       25
<PAGE>
    Except as noted below, Class B shares of the Fund which are held for six
years or more after purchase (calculated from the last day of the month in which
the shares were purchased) will not be subject to any CDSC upon redemption.
Shares redeemed earlier than six years after purchase may, however, be subject
to a CDSC which will be a percentage of the dollar amount of shares redeemed and
will be assessed on an amount equal to the lesser of the current market value or
the cost of the shares being redeemed. The size of this percentage will depend
upon how long the shares have been held, as set forth in the following table:
 
<TABLE>
<CAPTION>
                                              CDSC AS A
         YEAR SINCE PURCHASE                PERCENTAGE OF
             PAYMENT MADE                  AMOUNT REDEEMED
- --------------------------------------  ---------------------
<S>                                     <C>
First.................................          5.0%
Second................................          4.0%
Third.................................          3.0%
Fourth................................          2.0%
Fifth.................................          2.0%
Sixth.................................          1.0%
Seventh and thereafter................          None
</TABLE>
 
    In the case of Class B shares of the Fund purchased on or after July 28,
1997 by Qualified Retirement Plans for which MSDW Trust serves as Trustee or
DWR's Retirement Plan Services serves as recordkeeper pursuant to a written
Recordkeeping Services Agreement, shares held for three years or more after
purchase (calculated as described in the paragraph above) will not be subject to
any CDSC upon redemption. However, shares redeemed earlier than three years
after purchase may be subject to a CDSC (calculated as described in the
paragraph above), the percentage of which will depend on how long the shares
have been held, as set forth in the following table:
 
<TABLE>
<CAPTION>
         YEAR SINCE PURCHASE            CDSC AS A PERCENTAGE
             PAYMENT MADE                OF AMOUNT REDEEMED
- --------------------------------------  ---------------------
<S>                                     <C>
First.................................          2.0%
Second................................          2.0%
Third.................................          1.0%
Fourth and thereafter.................          None
</TABLE>
 
    CDSC WAIVERS.  A CDSC will not be imposed on: (i) any amount which
represents an increase in value of shares purchased within the six years (or, in
the case of shares held by certain Qualified Retirement Plans, three years)
preceding the redemption; (ii) the current net asset value of shares purchased
more than six years (or, in the case of shares held by certain Qualified
Retirement Plans, three years) prior to the redemption; and (iii) the current
net asset value of shares purchased through reinvestment of dividends or
distributions and/or shares acquired in exchange for shares of FSC Funds or of
other Morgan Stanley Dean Witter Funds acquired in exchange for such shares.
Moreover, in determining whether a CDSC is applicable it will be assumed that
amounts described in (i), (ii) and (iii) above (in that order) are redeemed
first.
 
    In addition, the CDSC, if otherwise applicable, will be waived in the case
of:
 
    (1) redemptions of shares held at the time a shareholder dies or becomes
disabled, only if the shares are:  (a) registered either in the name of an
individual shareholder (not a trust), or in the names of such shareholder and
his or her spouse as joint tenants with right of survivorship; or  (b) held in a
qualified corporate or self-employed retirement plan, Individual Retirement
Account ("IRA") or Custodial Account under Section 403(b)(7) of the Internal
Revenue Code ("403(b) Custodial Account"), provided in either case that the
redemption is requested within one year of the death or initial determination of
disability;
 
    (2) redemptions in connection with the following retirement plan
distributions:  (a) lump-sum or other distributions from a qualified corporate
or self-employed retirement plan following retirement (or, in the case of a "key
employee" of a "top heavy" plan, following attainment of age 59 1/2); (b)
distributions from an IRA or 403(b) Custodial Account following attainment of
age 59 1/2; or  (c) a tax-free return of an excess contribution to an IRA; and
 
                                       26
<PAGE>
    (3) all redemptions of shares held for the benefit of a participant in a
Qualified Retirement Plan which offers investment companies managed by the
Investment Manager or its subsidiary, MSDW Services, as self-directed investment
alternatives and for which MSDW Trust serves as Trustee or DWR's Retirement Plan
Services serves as recordkeeper pursuant to a written Recordkeeping Services
Agreement ("Eligible Plan"), provided that either:  (a) the plan continues to be
an Eligible Plan after the redemption; or  (b) the redemption is in connection
with the complete termination of the plan involving the distribution of all plan
assets to participants.
 
    With reference to (1) above, for the purpose of determining disability, the
Distributor utilizes the definition of disability contained in Section 72(m)(7)
of the Internal Revenue Code, which relates to the inability to engage in
gainful employment. With reference to (2) above, the term "distribution" does
not encompass a direct transfer of IRA, 403(b) Custodial Account or retirement
plan assets to a successor custodian or trustee. All waivers will be granted
only following receipt by the Distributor of confirmation of the shareholder's
entitlement.
 
    CONVERSION TO CLASS A SHARES.  All shares of the Fund held prior to July 28,
1997 have been designated Class B shares. Shares held before May 1, 1997 will
convert to Class A shares in May, 2007. In all other instances Class B shares
will convert automatically to Class A shares, based on the relative net asset
values of the shares of the two Classes on the conversion date, which will be
approximately ten (10) years after the date of the original purchase. The ten
year period is calculated from the last day of the month in which the shares
were purchased or, in the case of Class B shares acquired through an exchange or
a series of exchanges, from the last day of the month in which the original
Class B shares were purchased, provided that shares originally purchased before
May 1, 1997 will convert to Class A shares in May, 2007. The conversion of
shares purchased on or after May 1, 1997 will take place in the month following
the tenth anniversary of the purchase. There will also be converted at that time
such proportion of Class B shares acquired through automatic reinvestment of
dividends and distributions owned by the shareholder as the total number of his
or her Class B shares converting at the time bears to the total number of
outstanding Class B shares purchased and owned by the shareholder. In the case
of Class B shares held by a Qualified Retirement Plan for which MSDW Trust
serves as Trustee or DWR's Retirement Plan Services serves as recordkeeper
pursuant to a written Recordkeeping Services Agreement, the plan is treated as a
single investor and all Class B shares will convert to Class A shares on the
conversion date of the first shares of a Morgan Stanley Dean Witter Multi-Class
Fund purchased by that plan. In the case of Class B shares previously exchanged
for shares of an "Exchange Fund" (see "Shareholder Services-- Exchange
Privilege"), the period of time the shares were held in the Exchange Fund
(calculated from the last day of the month in which the Exchange Fund shares
were acquired) is excluded from the holding period for conversion. If those
shares are subsequently re-exchanged for Class B shares of a Morgan Stanley Dean
Witter Multi-Class Fund, the holding period resumes on the last day of the month
in which Class B shares are reacquired.
 
    If a shareholder has received share certificates for Class B shares, such
certificates must be delivered to the Transfer Agent at least one week prior to
the date for conversion. Class B shares evidenced by share certificates that are
not received by the Transfer Agent at least one week prior to any conversion
date will be converted into Class A shares on the next scheduled conversion date
after such certificates are received.
 
    Effectiveness of the conversion feature is subject to the continuing
availability of a ruling of the Internal Revenue Service or an opinion of
counsel that (i) the conversion of shares does not constitute a taxable event
under the Internal Revenue Code, (ii) Class A shares received on conversion will
have
 
                                       27
<PAGE>
a basis equal to the shareholder's basis in the converted Class B shares
immediately prior to the conversion, and (iii) Class A shares received on
conversion will have a holding period that includes the holding period of the
converted Class B shares. The conversion feature may be suspended if the ruling
or opinion is no longer available. In such event, Class B shares would continue
to be subject to Class B 12b-1 fees.
 
LEVEL LOAD ALTERNATIVE--CLASS C SHARES
 
    Class C shares are sold at net asset value next determined without an
initial sales charge but are subject to a CDSC of 1.0% on most redemptions made
within one year after purchase (calculated from the last day of the month in
which the shares were purchased). The CDSC will be assessed on an amount equal
to the lesser of the current market value or the cost of the shares being
redeemed. The CDSC will not be imposed in the circumstances set forth above in
the section "Contingent Deferred Sales Charge Alternative--Class B Shares--CDSC
Waivers," except that the references to six years in the first paragraph of that
section shall mean one year in the case of Class C shares. Class C shares are
subject to an annual 12b-1 fee of up to 1.0% of the average daily net assets of
the Class. Unlike Class B shares, Class C shares have no conversion feature and,
accordingly, an investor that purchases Class C shares will be subject to 12b-1
fees applicable to Class C shares for an indefinite period subject to annual
approval by the Fund's Board of Trustees and regulatory limitations.
 
NO LOAD ALTERNATIVE--CLASS D SHARES
 
    Class D shares are offered without any sales charge on purchase or
redemption and without any 12b-1 fee. Class D shares are offered only to
investors meeting an initial investment minimum of $5 million ($25 million for
Qualified Retirement Plans for which MSDW Trust serves as Trustee or DWR's
Retirement Plan Services serves as recordkeeper pursuant to a written
Recordkeeping Services Agreement) and the following categories of investors: (i)
investors participating in the MSDW Advisors mutual fund asset allocation
program pursuant to which such persons pay an asset based fee; (ii) persons
participating in a fee-based program approved by the Distributor, pursuant to
which such persons pay an asset based fee for services in the nature of
investment advisory, administrative and/or brokerage services (subject to all of
the terms and conditions of such programs referred to in (i) and (ii) above,
which may include termination fees, mandatory redemption upon termination and
such other circumstances as specified in the programs' agreements, and
restrictions on transferability of Fund shares); (iii) 401(k) plans established
by DWR and SPS Transaction Services, Inc. (an affiliate of DWR) for their
employees; (iv) certain Unit Investment Trusts sponsored by DWR; (v) certain
other open-end investment companies whose shares are distributed by the
Distributor; and (vi) other categories of investors, at the discretion of the
Board, as disclosed in the then current prospectus of the Fund. Investors who
require a $5 million (or $25 million) minimum initial investment to qualify to
purchase Class D shares may satisfy that requirement by investing that amount in
a single transaction in Class D shares of the Fund and other Morgan Stanley Dean
Witter Multi-Class Funds, subject to the $1,000 minimum initial investment
required for that Class of the Fund. In addition, for the purpose of meeting the
$5 million (or $25 million) minimum investment amount, holdings of Class A
shares in all Morgan Stanley Dean Witter Multi-Class Funds, shares of FSC Funds
and shares of Morgan Stanley Dean Witter Funds for which such shares have been
exchanged will be included together with the current investment amount. If a
shareholder redeems Class A shares and purchases Class D shares, such redemption
may be a taxable event.
 
PLAN OF DISTRIBUTION
 
    The Fund has adopted a Plan of Distribution pursuant to Rule 12b-1 under the
Act with respect to the distribution of Class A, Class B and Class C shares of
the Fund. In the case of Class A and
 
                                       28
<PAGE>
Class C shares, the Plan provides that the Fund will reimburse the Distributor
and others for the expenses of certain activities and services incurred by them
specifically on behalf of those shares. Reimbursements for these expenses will
be made in monthly payments by the Fund to the Distributor, which will in no
event exceed amounts equal to payments at the annual rates of 0.25% and 1.0% of
the average daily net assets of Class A and Class C, respectively. In the case
of Class B shares, the Plan provides that the Fund will pay the Distributor a
fee, which is accrued daily and paid monthly, at the annual rate of 1.0% of the
lesser of: (a) the average daily aggregate gross sales of the Fund's Class B
shares since the inception of the Fund (not including reinvestments of dividends
or capital gains distributions), less the average daily aggregate net asset
value of the Fund's Class B shares redeemed since the Fund's inception upon
which a CDSC has been imposed or waived, or (b) the average daily net assets of
Class B. The fee is treated by the Fund as an expense in the year it is accrued.
In the case of Class A shares, the entire amount of the fee currently represents
a service fee within the meaning of the NASD guidelines. In the case of Class B
and Class C shares, a portion of the fee payable pursuant to the Plan, equal to
0.25% of the average daily net assets of each of these Classes, is currently
characterized as a service fee. A service fee is a payment made for personal
service and/or the maintenance of shareholder accounts.
 
    Additional amounts paid under the Plan in the case of Class B and Class C
shares are paid to the Distributor for services provided and the expenses borne
by the Distributor and others in the distribution of the shares of those
Classes, including the payment of commissions for sales of the shares of those
Classes and incentive compensation to and expenses of Morgan Stanley Dean Witter
Financial Advisors and others who engage in or support distribution of shares or
who service shareholder accounts, including overhead and telephone expenses;
printing and distribution of prospectuses and reports used in connection with
the offering of the Fund's shares to other than current shareholders; and
preparation, printing and distribution of sales literature and advertising
materials. In addition, the Distributor may utilize fees paid pursuant to the
Plan in the case of Class B shares to compensate DWR and other Selected
Broker-Dealers for their opportunity costs in advancing such amounts, which
compensation would be in the form of a carrying charge on any unreimbursed
expenses.
 
    For the fiscal year ended May 31, 1998, Class B shares of the Fund accrued
payments under the Plan amounting to $812,930, which amount is equal to 1.0% of
the average daily net assets of Class B for the fiscal year. These payments were
calculated pursuant to clause (b) of the compensation formula under the Plan.
All shares held prior to July 28, 1997 have been designated Class B shares. For
the fiscal period July 28, 1997 through May 31, 1998, Class A and Class C shares
of the Fund accrued payments under the Plan amounting to $180 and $533,
respectively, which amounts on an annualized basis are equal to 0.24% and 1.0%
of the average daily net assets of Class A and Class C, respectively, for such
period.
 
    In the case of Class B shares, at any given time, the expenses in
distributing Class B shares of the Fund may be in excess of the total of (i) the
payments made by the Fund pursuant to the Plan, and (ii) the proceeds of CDSCs
paid by investors upon the redemption of Class B shares. For example, if $1
million in expenses in distributing Class B shares of the Fund had been incurred
and $750,000 had been received as described in (i) and (ii) above, the excess
expense would amount to $250,000. The Distributor has advised the Fund that such
excess amounts, including the carrying charge described above, totalled
$8,243,906 at May 31, 1998, which was equal to 10.14% of the net assets of Class
B on such date. Because there is no requirement under the Plan that the
Distributor be reimbursed for all distribution expenses or any requirement that
the Plan be continued from year to year, such excess amount does not constitute
a liability of the Fund. Although there is no legal obligation for the Fund to
 
                                       29
<PAGE>
pay expenses incurred in excess of payments made to the Distributor under the
Plan, and the proceeds of CDSCs paid by investors upon redemption of shares, if
for any reason the Plan is terminated the Trustees will consider at that time
the manner in which to treat such expenses. Any cumulative expenses incurred,
but not yet recovered through distribution fees or CDSCs, may or may not be
recovered through future distribution fees or CDSCs.
 
    In the case of Class A and Class C shares, expenses incurred pursuant to the
Plan in any calendar year in excess of 0.25% or 1.0% of the average daily net
assets of Class A or Class C, respectively, will not be reimbursed by the Fund
through payments in any subsequent year, except that expenses representing a
gross sales commission credited to Morgan Stanley Dean Witter Financial Advisors
and other Selected Broker-Dealer representatives at the time of sale may be
reimbursed in the subsequent calendar year. The Distributor has advised the Fund
that unreimbursed expenses representing a gross sales commission credited to
Morgan Stanley Dean Witter Financial Advisors and other Selected Broker-Dealer
representatives at the time of sale totalled $398 in the case of Class C at
December 31, 1997, which was equal to 0.63% of the net assets of Class C on such
date, and that there were no such expenses which may be reimbursed in the
subsequent year in the case of Class A on such date. No interest or other
financing charges will be incurred on any Class A or Class C distribution
expenses incurred by the Distributor under the Plan or on any unreimbursed
expenses due to the Distributor pursuant to the Plan.
 
DETERMINATION OF NET ASSET VALUE
 
    The net asset value per share is determined once daily at 4:00 p.m., New
York time, on each day that the New York Stock Exchange is open (or, on days
when the New York Stock Exchange closes prior to 4:00 p.m., at such earlier
time) by taking the net assets of the Fund, dividing by the number of shares
outstanding and adjusting to the nearest cent. The assets belonging to the Class
A, Class B, Class C and Class D shares will be invested together in a single
portfolio. The net asset value of each Class, however, will be determined
separately by subtracting each Class's accrued expenses and liabilities. The net
asset value per share will not be determined on Good Friday and on such other
federal and non-federal holidays as are observed by the New York Stock Exchange.
 
    In the calculation of the Fund's net asset value: (1) an equity portfolio
security listed or traded on the New York or American Stock Exchange or other
domestic or foreign stock exchange is valued at its latest sale price on that
exchange or quotation service, prior to the time assets are valued; if there
were no sales that day, the security is valued at the latest bid price (in cases
where a security is traded on more than one exchange, the security is valued on
the exchange designated as the primary market pursuant to procedures adopted by
the Trustees); and (2) all other portfolio securities for which over-the-counter
market quotations are readily available are valued at the latest bid price. When
market quotations are not readily available, including circumstances under which
it is determined by the Investment Manager or Sub-Advisor that sale and bid
prices are not reflective of a security's market value, portfolio securities are
valued at their fair value as determined in good faith under procedures
established by and under the general supervision of the Board of Trustees. For
valuation purposes, quotations of foreign portfolio securities, other assets and
liabilities and forward contracts stated in foreign currency are translated into
U.S. dollar equivalents at the prevailing market rates prior to the close of the
New York Stock Exchange. Dividends receivable are accrued as of the ex-dividend
date or as of the time that the relevant ex-dividend date and amounts become
known.
 
    Short-term debt securities with remaining maturities of sixty days or less
at the time of purchase are valued at amortized cost, unless the Trustees
determine such does not reflect the securities' market value, in which case
these securities will
 
                                       30
<PAGE>
be valued at their fair value as determined by the Trustees.
 
    Certain of the Fund's portfolio securities may be valued by an outside
pricing service approved by the Fund's Trustees. The pricing service may utilize
a matrix system incorporating security quality, maturity and coupon as the
evaluation model parameters, and/or research evaluations by its staff, including
review of broker-dealer market price quotations, in determining what it believes
is the fair valuation of the portfolio securities valued by such pricing
service.
 
    Generally, trading in foreign securities, as well as corporate bonds, United
States government securities and money market instruments, is substantially
completed each day at various times prior to the close of the New York Stock
Exchange. The values of such securities used in computing the net asset value of
the Fund's shares are determined as of such times. Foreign currency exchange
rates are also generally determined prior to the close of the New York Stock
Exchange. Occasionally, events which affect the values of such securities and
such exchange rates may occur between the times at which they are determined and
the close of the New York Stock Exchange and will therefore not be reflected in
the computation of the Fund's net asset value. If events materially affecting
the value of such securities occur during such period, then these securities
will be valued at their fair value as determined in good faith under procedures
established by and under the supervision of the Trustees.
 
SHAREHOLDER SERVICES
- --------------------------------------------------------------------------------
 
    AUTOMATIC INVESTMENT OF DIVIDENDS AND DISTRIBUTIONS.  All income dividends
and capital gains distributions are automatically paid in full and fractional
shares of the applicable Class of the Fund (or, if specified by the shareholder,
in shares of any other open-end Morgan Stanley Dean Witter Fund), unless the
shareholder requests that they be paid in cash. Shares so acquired are acquired
at net asset value and are not subject to the imposition of a front-end sales
charge or a CDSC (see "Redemptions and Repurchases").
 
    INVESTMENT OF DIVIDENDS AND DISTRIBUTIONS RECEIVED IN CASH.  Any shareholder
who receives a cash payment representing a dividend or capital gains
distribution may invest such dividend or distribution in shares of the
applicable Class at the net asset value per share next determined after receipt
by the Transfer Agent, by returning the check or the proceeds to the Transfer
Agent within thirty days after the payment date. Shares so acquired are acquired
at net asset value and are not subject to the imposition of a front-end sales
charge or a CDSC (see "Redemptions and Repurchases").
 
    EASYINVEST-SM-.  Shareholders may subscribe to EasyInvest, an automatic
purchase plan which provides for any amount from $100 to $5,000 to be
transferred automatically from a checking or savings account, or following
redemption of shares of a Morgan Stanley Dean Witter money market fund, on a
semi-monthly, monthly or quarterly basis, to the Transfer Agent for investment
in shares of the Fund (see "Purchase of Fund Shares" and "Redemptions and
Repurchases--Involuntary Redemption").
 
    SYSTEMATIC WITHDRAWAL PLAN.  A systematic withdrawal plan (the "Withdrawal
Plan") is available for shareholders who own or purchase shares of the Fund
having a minimum value of $10,000 based upon the then current net asset value.
The Withdrawal Plan provides for monthly or quarterly (March, June, September
and December) checks in any dollar amount, not less than $25, or in any whole
percentage of the account balance, on an annualized basis. Any applicable CDSC
will be imposed on shares redeemed under the Withdrawal Plan (see "Purchase of
Fund Shares"). Therefore, any shareholder participating in the Withdrawal Plan
will have sufficient shares redeemed from his or her account so that the
proceeds (net of any applicable CDSC) to the shareholder will be the designated
monthly or quarterly amount. Withdrawal plan payments should
 
                                       31
<PAGE>
not be considered as dividends, yields or income. If periodic withdrawal plan
payments continuously exceed net investment income and net capital gains, the
shareholder's original investment will be correspondingly reduced and ultimately
exhausted. Each withdrawal constitutes a redemption of shares and any gain or
loss realized must be recognized for federal income tax purposes.
 
    Shareholders should contact their Morgan Stanley Dean Witter Financial
Advisor or other Selected Broker-Dealer representative or the Transfer Agent for
further information about any of the above services.
 
    TAX-SHELTERED RETIREMENT PLANS.  Retirement plans are available for use by
corporations, the self-employed, Individual Retirement Accounts and Custodial
Accounts under Section 403(b)(7) of the Internal Revenue Code. Adoption of such
plans should be on advice of legal counsel or tax adviser.
 
    For further information regarding plan administration, custodial fees and
other details, investors should contact their Morgan Stanley Dean Witter
Financial Advisor or other Selected Broker-Dealer representative or the Transfer
Agent.
 
EXCHANGE PRIVILEGE
 
    Shares of each Class may be exchanged for shares of the same Class of any
other Morgan Stanley Dean Witter Multi-Class Fund without the imposition of any
exchange fee. Shares may also be exchanged for shares of the following funds:
Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust, Morgan Stanley Dean
Witter Limited Term Municipal Trust, Morgan Stanley Dean Witter Short-Term Bond
Fund and five Morgan Stanley Dean Witter Funds which are money market funds (the
"Exchange Funds"). Class A shares may also be exchanged for shares of Morgan
Stanley Dean Witter Multi-State Municipal Series Trust and Morgan Stanley Dean
Witter Hawaii Municipal Trust, which are Morgan Stanley Dean Witter Funds sold
with a front-end sales charge ("FSC Funds"). Class B shares may also be
exchanged for shares of Morgan Stanley Dean Witter Global Short-Term Income Fund
Inc. ("Global Short-Term"), which is a Morgan Stanley Dean Witter Fund offered
with a CDSC. Exchanges may be made after the shares of the Fund acquired by
purchase (not by exchange or dividend reinvestment) have been held for thirty
days. There is no waiting period for exchanges of shares acquired by exchange or
dividend reinvestment.
 
    An exchange to another Morgan Stanley Dean Witter Multi-Class Fund, any FSC
Fund, Global Short-Term or any Exchange Fund that is not a money market fund is
on the basis of the next calculated net asset value per share of each fund after
the exchange order is received. When exchanging into a money market fund from
the Fund, shares of the Fund are redeemed out of the Fund at their next
calculated net asset value and the proceeds of the redemption are used to
purchase shares of the money market fund at the net asset value determined the
following business day. Subsequent exchanges between any of the money market
funds and any of the Morgan Stanley Dean Witter Multi-Class Funds, FSC Funds,
Global Short-Term or any Exchange Fund that is not a money market fund can be
effected on the same basis.
 
    No CDSC is imposed at the time of any exchange of shares, although any
applicable CDSC will be imposed upon ultimate redemption. During the period of
time the shareholder remains in an Exchange Fund (calculated from the last day
of the month in which the Exchange Fund shares were acquired), the holding
period (for the purpose of determining the rate of the CDSC) is frozen. If those
shares are subsequently re-exchanged for shares of a Morgan Stanley Dean Witter
Multi-Class Fund or shares of Global Short-Term, the holding period previously
frozen when the first exchange was made resumes on the last day of the month in
which shares of a Morgan Stanley Dean Witter Multi-Class Fund or shares of
Global Short-Term are reacquired. Thus, the CDSC is based upon the time
(calculated as described above) the shareholder was invested in shares of a
Morgan Stanley Dean Witter Multi-Class Fund or in shares of Global Short-Term
(see
 
                                       32
<PAGE>
"Purchase of Fund Shares"). In the case of exchanges of Class A shares which are
subject to a CDSC, the holding period also includes the time (calculated as
described above) the shareholder was invested in shares of a FSC Fund. In the
case of shares exchanged into an Exchange Fund on or after April 23, 1990, upon
a redemption of shares which results in a CDSC being imposed, a credit (not to
exceed the amount of the CDSC) will be given in an amount equal to the Exchange
Fund 12b-1 distribution fees incurred on or after that date which are
attributable to those shares. (Exchange Fund 12b-1 distribution fees are
described in the prospectuses for those funds.) Class B shares of the Fund
acquired in exchange for shares of Global Short-Term or Class B shares of
another Morgan Stanley Dean Witter Multi-Class Fund having a different CDSC
schedule than that of this Fund will be subject to the higher CDSC schedule,
even if such shares are subsequently re-exchanged for shares of the fund with
the lower CDSC schedule.
 
    ADDITIONAL INFORMATION REGARDING EXCHANGES. Purchases and exchanges should
be made for investment purposes only. A pattern of frequent exchanges may be
deemed by the Investment Manager to be abusive and contrary to the best
interests of the Fund's other shareholders and, at the Investment Manager's
discretion, may be limited by the Fund's refusal to accept additional purchases
and/ or exchanges from the investor. Although the Fund does not have any
specific definition of what constitutes a pattern of frequent exchanges, and
will consider all relevant factors in determining whether a particular situation
is abusive and contrary to the best interests of the Fund and its other
shareholders, investors should be aware that the Fund and each of the other
Morgan Stanley Dean Witter Funds may in their discretion limit or otherwise
restrict the number of times this Exchange Privilege may be exercised by any
investor. Any such restriction will be made by the Fund on a prospective basis
only, upon notice of the shareholder not later than ten days following such
shareholder's most recent exchange. Also, the Exchange Privilege may be
terminated or revised at any time by the Fund and/or any of such Morgan Stanley
Dean Witter Funds for which shares of the Fund have been exchanged, upon such
notice as may be required by applicable regulatory agencies. Shareholders
maintaining margin accounts with DWR or another Selected Broker-Dealer are
referred to their Morgan Stanley Dean Witter Financial Advisor or other Selected
Broker-Dealer representative regarding restrictions on exchange of shares of the
Fund pledged in the margin account.
 
    The current prospectus for each fund describes its investment objective(s)
and policies, and shareholders should obtain a copy and examine it carefully
before investing. Exchanges are subject to the minimum investment requirement of
each Class of shares and any other conditions imposed by each fund. In the case
of a shareholder holding a share certificate or certificates, no exchanges may
be made until all applicable share certificates have been received by the
Transfer Agent and deposited in the shareholder's account. An exchange will be
treated for federal income tax purposes the same as a repurchase or redemption
of shares, on which the shareholder may realize a capital gain or loss. However,
the ability to deduct capital losses on an exchange may be limited in situations
where there is an exchange of shares within ninety days after the shares are
purchased. The Exchange Privilege is only available in states where an exchange
may legally be made.
 
    If DWR or another Selected Broker-Dealer is the current dealer of record and
its account numbers are part of the account information, shareholders may
initiate an exchange of shares of the Fund for shares of any of the Morgan
Stanley Dean Witter Funds (for which the Exchange Privilege is available)
pursuant to this Exchange Privilege by contacting their Morgan Stanley Dean
Witter Financial Advisor or other Selected Broker-Dealer representative (no
Exchange Privilege Authorization Form is required). Other shareholders (and
those shareholders who are clients of DWR or another Selected Broker-Dealer but
who wish to make exchanges
 
                                       33
<PAGE>
directly by writing or telephoning the Transfer Agent) must complete and forward
to the Transfer Agent an Exchange Privilege Authorization Form, copies of which
may be obtained from the Transfer Agent, to initiate an exchange. If the
Authorization Form is used, exchanges may be made in writing or by contacting
the Transfer Agent at (800) 869-NEWS (toll-free).
 
    The Fund will employ reasonable procedures to confirm that exchange
instructions communicated over the telephone are genuine. Such procedures may
include requiring various forms of personal identification such as name, mailing
address, social security or other tax identification number and DWR or other
Selected Broker-Dealer account number (if any). Telephone instructions may also
be recorded. If such procedures are not employed, the Fund may be liable for any
losses due to unauthorized or fraudulent instructions.
 
    Telephone exchange instructions will be accepted if received by the Transfer
Agent between 9:00 a.m. and 4:00 p.m., New York time, on any day the New York
Stock Exchange is open. Any shareholder wishing to make an exchange who has
previously filed an Exchange Privilege Authorization Form and who is unable to
reach the Fund by telephone should contact his or her Morgan Stanley Dean Witter
Financial Advisor or other Selected Broker-Dealer representative, if
appropriate, or make a written exchange request. Shareholders are advised that
during periods of drastic economic or market changes, it is possible that the
telephone exchange procedures may be difficult to implement, although this has
not been the experience with the Morgan Stanley Dean Witter Funds in the past.
 
    Shareholders should contact their Morgan Stanley Dean Witter Financial
Advisor or other Selected Broker-Dealer representative or the Transfer Agent for
further information about the Exchange Privilege.
 
REDEMPTIONS AND REPURCHASES
- --------------------------------------------------------------------------------
 
    REDEMPTION.  Shares of each Class of the Fund can be redeemed for cash at
any time at the net asset value per share next determined less the amount of any
applicable CDSC in the case of Class A, Class B or Class C shares (see "Purchase
of Fund Shares"). If shares are held in a shareholder's account without a share
certificate, a written request for redemption sent to the Fund's Transfer Agent
at P.O. Box 983, Jersey City, NJ 07303 is required. If certificates are held by
the shareholder(s), the shares may be redeemed by surrendering the certificates
with a written request for redemption, along with any additional information
required by the Transfer Agent.
 
    REPURCHASE.  DWR and other Selected Broker-Dealers are authorized to
repurchase shares represented by a share certificate which is delivered to any
of their offices. Shares held in a shareholder's account without a share
certificate may also be repurchased by DWR and other Selected Broker-Dealers
upon the telephonic or telegraphic request of the shareholder. The repurchase
price is the net asset value next computed (see "Purchase of Fund Shares") after
such repurchase order is received by DWR or other Selected Broker-Dealer,
reduced by any applicable CDSC.
 
    The CDSC, if any, will be the only fee imposed upon repurchase by the Fund
or the Distributor. The offer by DWR and other Selected Broker-Dealers to
repurchase shares may be suspended without notice by them at any time. In that
event, shareholders may redeem their shares through the Fund's Transfer Agent as
set forth above under "Redemption."
 
    PAYMENT FOR SHARES REDEEMED OR REPURCHASED.  Payment for shares presented
for repurchase or redemption will be made by check within seven days after
receipt by the Transfer Agent of the certificate and/or written request in good
order.
 
                                       34
<PAGE>
Such payment may be postponed or the right of redemption suspended under unusual
circumstances, E.G., when normal trading is not taking place on the New York
Stock Exchange. If the shares to be redeemed have recently been purchased by
check, payment of the redemption proceeds may be delayed for the minimum time
needed to verify that the check used for investment has been honored (not more
than fifteen days from the time of receipt of the check by the Transfer Agent).
Shareholders maintaining margin accounts with DWR or another Selected
Broker-Dealer are referred to their Morgan Stanley Dean Witter Financial Advisor
or other Selected Broker-Dealer representative regarding restrictions on
redemption of shares of the Fund pledged in the margin account.
 
    REINSTATEMENT PRIVILEGE.  A shareholder who has had his or her shares
redeemed or repurchased and has not previously exercised this reinstatement
privilege may, within 35 days after the date of the redemption or repurchase,
reinstate any portion or all of the proceeds of such redemption or repurchase in
shares of the Fund in the same Class from which such shares were redeemed or
repurchased, at their net asset value next determined after a reinstatement
request, together with the proceeds, is received by the Transfer Agent and
receive a pro-rata credit for any CDSC paid in connection with such redemption
or repurchase.
 
    INVOLUNTARY REDEMPTION.  The Fund reserves the right to redeem, on 60 days'
notice and at net asset value, the shares of any shareholder (other than shares
held in an Individual Retirement Account or Custodial Account under Section
403(b)(7) of the Internal Revenue Code) whose shares due to redemptions by the
shareholder have a value of less than $100 or such lesser amount as may be fixed
by the Trustees or, in the case of an account opened through EasyInvest-SM-, if
after twelve months the shareholder has invested less than $1,000 in the
account. However, before the Fund redeems such shares and sends the proceeds to
the shareholder, it will notify the shareholder that the value of the shares is
less than the applicable amount and allow him or her 60 days to make an
additional investment in an amount which will increase the value of his or her
account to at least the applicable amount before the redemption is processed. No
CDSC will be imposed on any involuntary redemption.
 
DIVIDENDS, DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------
 
    DIVIDENDS AND DISTRIBUTIONS.  The Fund declares dividends separately for
each Class of shares and intends to pay dividends and to distribute
substantially all of its net investment income and distribute capital gains, if
any, once each year. The Fund may, however, determine either to distribute or to
retain all or part of any long-term capital gains in any year for reinvestment.
 
    All dividends and any capital gains distributions will be paid in additional
shares of the same Class and automatically credited to the shareholder's account
without issuance of a share certificate unless the shareholder requests in
writing that all dividends and/or distributions be paid in cash. Shares acquired
by dividend and distribution reinvestments will not be subject to any front-end
sales charge or CDSC. Class B shares acquired through dividend and distribution
reinvestments will become eligible for conversion to Class A shares on a pro
rata basis. Distributions paid on Class A and Class D shares will be higher than
for Class B and Class C shares because distribution fees paid by Class B and
Class C shares are higher. (See "Shareholder Services--Automatic Investment of
Dividends and Distributions.")
 
    TAXES.  Because the Fund intends to distribute all of its net investment
income and net short-term capital gains to shareholders and otherwise qualify as
a regulated investment company under Subchapter M of the Internal Revenue Code,
it is not expected that the Fund will be required to pay any Federal income tax
on any such income and capital
 
                                       35
<PAGE>
gains. Shareholders will normally have to pay Federal income taxes, and any
state and local income taxes, on the dividends and distributions they receive
from the Fund.
 
    Distributions of net investment income and net short-term capital gains are
taxable to the shareholder as ordinary dividend income regardless of whether the
shareholder receives such distributions in additional shares or in cash. Any
dividends declared in the last quarter of any calendar year which are paid in
the following year prior to February 1 will be deemed, for tax purposes, to have
been received by the shareholder in the prior year.
 
    Distributions of net long-term capital gains, if any, are taxable to
shareholders as long-term capital gains regardless of how long a shareholder has
held the Fund's shares and regardless of whether the distribution is received in
additional shares or in cash. Capital gains distributions are not eligible for
the dividends received deduction.
 
    The Fund may at times make payments from sources other than income or net
capital gains. Payments from such sources would, in effect, represent a return
of a portion of each shareholder's investment. All, or a portion, of such
payments would not be taxable to shareholders.
 
    After the end of the calendar year, shareholders will be sent full
information on their dividends and capital gains distributions for tax purposes.
Shareholders will also be notified of their proportionate share of long-term
capital gains distributions that are eligible for a reduced rate of tax under
the Taxpayer Relief Act of 1997. To avoid being subject to a 31% Federal backup
withholding tax on taxable dividends, capital gains distributions and the
proceeds of redemptions and repurchases, shareholders' taxpayer identification
numbers must be furnished and certified as to their accuracy.
 
    Dividends, interest and gains received by the Fund may give rise to
withholding and other taxes imposed by foreign countries. If it qualifies for
and makes the appropriate election with the Internal Revenue Service, the Fund
will report annually to its shareholders the amount per share of such taxes to
enable shareholders to claim United States foreign tax credits or deductions
with respect to such taxes. In the absence of such an election, the Fund would
deduct foreign tax in computing the amount of its distributable income.
 
    Shareholders should consult their tax advisors as to the applicability of
the foregoing to their current situation.
 
PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------
 
    From time to time the Fund may quote its "total return" in advertisements
and sales literature. These figures are computed separately for Class A, Class
B, Class C and Class D shares. The total return of the Fund is based on
historical earnings and is not intended to indicate future performance. The
"average annual total return" of the Fund refers to a figure reflecting the
average annualized percentage increase (or decrease) in the value of an initial
investment in a Class of the Fund of $1,000 over periods of one, five and ten
years or over the life of the Fund, if less than any of the foregoing. Average
annual total return reflects all income earned by the Fund, any appreciation or
depreciation of the Fund's assets, all expenses incurred by the applicable Class
and all sales charges incurred by shareholders, for the stated periods. It also
assumes reinvestment of all dividends and distributions paid by the Fund.
 
    In addition to the foregoing, the Fund may advertise its total return for
each Class over different periods of time by means of aggregate, average, and
year-by-year or other types of total return figures. The Fund may also advertise
the growth of hypothetical investments of $10,000, $50,000 and $100,000 in each
Class of shares of the Fund. Such calculations may or may not reflect the
deduction of any sales charge which, if reflected, would reduce the performance
quoted. The Fund from time to
 
                                       36
<PAGE>
time may also advertise its performance relative to certain performance rankings
and indexes compiled by independent organizations, such as mutual fund
performance rankings of Lipper Analytical Services, Inc.
 
ADDITIONAL INFORMATION
- --------------------------------------------------------------------------------
 
    VOTING RIGHTS.  All shares of beneficial interest of the Fund are of $0.01
par value and are equal as to earnings, assets and voting privileges except that
each Class will have exclusive voting privileges with respect to matters
relating to distribution expenses borne solely by such Class or any other matter
in which the interests of one Class differ from the interests of any other
Class. In addition, Class B shareholders will have the right to vote on any
proposed material increase in Class A's expenses, if such proposal is submitted
separately to Class A shareholders. Also, as discussed herein, Class A, Class B
and Class C bear the expenses related to the distribution of their respective
shares.
 
    The Fund is not required to hold Annual Meetings of Shareholders and, in
ordinary circumstances, the Fund does not intend to hold such meetings. The
Trustees may call Special Meetings of Shareholders for action by shareholder
vote as may be required by the Investment Company Act or the Declaration of
Trust. Under certain circumstances the Trustees may be removed by action of the
Trustees or by the shareholders.
 
    Under Massachusetts law, shareholders of a business trust may, under certain
circumstances, be held personally liable as partners for obligations of the
Fund. However, the Declaration of Trust contains an express disclaimer of
shareholder liability for acts or obligations of the Fund, requires that Fund
obligations include such disclaimer, and provides for indemnification and
reimbursement of expenses out of the Fund's property for any shareholder held
personally liable for the obligations of the Fund. Thus, the risk of a
shareholder incurring financial loss on account of shareholder liability is
limited to circumstances in which the Fund itself would be unable to meet its
obligations. Given the above limitations on shareholder personal liability, and
the nature of the Fund's assets and operations, in the opinion of Massachusetts
counsel to the Fund, the risk to shareholders of personal liability is remote.
 
    CODE OF ETHICS.  Directors, officers and employees of MSDW Advisors, MSDW
Services and MSDW Distributors are subject to a strict Code of Ethics adopted by
those companies. The Code of Ethics is intended to ensure that the interests of
shareholders and other clients are placed ahead of any personal interest, that
no undue personal benefit is obtained from a person's employment activities and
that actual and potential conflicts of interest are avoided. To achieve these
goals and comply with regulatory requirements, the Code of Ethics requires,
among other things, that personal securities transactions by employees of the
companies be subject to an advance clearance process to monitor that no Morgan
Stanley Dean Witter Fund is engaged at the same time in a purchase or sale of
the same security. The Code of Ethics bans the purchase of securities in an
initial public offering, and also prohibits engaging in futures and options
transactions and profiting on short-term trading (that is, a purchase within
sixty days of a sale or a sale within sixty days of a purchase) of a security.
In addition, investment personnel may not purchase or sell a security for their
personal account within thirty days before or after any transaction in any
Morgan Stanley Dean Witter Fund managed by them. Any violations of the Code of
Ethics are subject to sanctions, including reprimand, demotion or suspension or
termination of employment. The Code of Ethics comports with regulatory
requirements and the recommendations in the 1994 report by the Investment
Company Institute Advisory Group on Personal Investing.
 
    The Fund's Sub-Advisor also has a code of ethics which complies with
regulatory requirements
 
                                       37
<PAGE>
and, insofar as it relates to persons associated with the Fund, the 1994 report
by the Investment Company Institute Advisory Group on Personal Investing.
 
    MASTER/FEEDER CONVERSION.  The Fund reserves the right to seek to achieve
its investment objective by investing all of its investable assets in an open-
end management investment company having the same investment objective and
policies and substantially the same investment restrictions as those applicable
to the Fund.
 
    SHAREHOLDER INQUIRIES.  All inquiries regarding the Fund should be directed
to the Fund at the telephone numbers or address set forth on the front cover of
this Prospectus.
 
                                       38
<PAGE>
Morgan Stanley
Dean Witter
International SmallCap Fund
Two World Trade Center
New York, New York 10048
 
TRUSTEES
 
Michael Bozic
Charles A. Fiumefreddo
Edwin J. Garn
John R. Haire
Wayne E. Hedien
Dr. Manuel H. Johnson
Michael E. Nugent
Philip J. Purcell
John L. Schroeder
 
OFFICERS
 
Charles A. Fiumefreddo
Chairman and Chief Executive Officer
Barry Fink
Vice President, Secretary and General Counsel
Thomas F. Caloia
Treasurer
 
CUSTODIAN
 
The Chase Manhattan Bank
One Chase Plaza
New York, New York 10081
 
TRANSFER AGENT AND
DIVIDEND DISBURSING AGENT
 
Morgan Stanley
Dean Witter Trust FSB
Harborside Financial Center,
Plaza Two
Jersey City, New Jersey 07311
 
INDEPENDENT ACCOUNTANTS
 
PricewaterhouseCoopers LLP
1177 Avenue of the Americas
New York, New York 10036
 
INVESTMENT MANAGER
 
Morgan Stanley Dean Witter Advisors Inc.
 
SUB-ADVISOR
 
Morgan Stanley Asset Management Inc.
 
MORGAN STANLEY
DEAN WITTER
INTERNATIONAL
SMALLCAP
FUND
 
                              [GRAPHIC]
                                                     PROSPECTUS -- JULY 30, 1998
<PAGE>
STATEMENT OF ADDITIONAL INFORMATION
                                                                  MORGAN STANLEY
JULY 30, 1998
                                                                     DEAN WITTER
                                                                   INTERNATIONAL
                                                                   SMALLCAP FUND
- --------------------------------------------------
 
    Morgan Stanley Dean Witter International SmallCap Fund (the "Fund") is an
open-end management investment company whose investment objective is to seek
long-term growth of capital. The Fund seeks to achieve its objective by
investing primarily in securities of small non-U.S. companies. (See "Investment
Objective and Policies.")
 
    A Prospectus for the Fund dated July 30, 1998, which provides the basic
information you should know before investing in the Fund, may be obtained
without charge from the Fund at its address or telephone numbers listed below or
from the Fund's Distributor, Morgan Stanley Dean Witter Distributors Inc., or
from Dean Witter Reynolds Inc. at any of its branch offices. This Statement of
Additional Information is not a Prospectus. It contains information in addition
to and more detailed than that set forth in the Prospectus. It is intended to
provide additional information regarding the activities and operations of the
Fund, and should be read in conjunction with the Prospectus.
 
Morgan Stanley Dean Witter
International SmallCap Fund
Two World Trade Center
New York, New York 10048
(212) 392-2550 or
(800) 869-NEWS (toll-free)
<PAGE>
TABLE OF CONTENTS
- --------------------------------------------------------------------------------
 
<TABLE>
<S>                                                                                      <C>
The Fund and its Management............................................................          3
 
Trustees and Officers..................................................................          9
 
Investment Practices and Policies......................................................         14
 
Investment Restrictions................................................................         31
 
Portfolio Transactions and Brokerage...................................................         32
 
The Distributor........................................................................         34
 
Determination of Net Asset Value.......................................................         38
 
Purchase of Fund Shares................................................................         39
 
Shareholder Services...................................................................         41
 
Redemptions and Repurchases............................................................         46
 
Dividends, Distributions and Taxes.....................................................         47
 
Performance Information................................................................         50
 
Description of Shares..................................................................         51
 
Custodian and Transfer Agent...........................................................         52
 
Independent Accountants................................................................         52
 
Reports to Shareholders................................................................         52
 
Legal Counsel..........................................................................         52
 
Experts................................................................................         52
 
Registration Statement.................................................................         52
 
Financial Statements -- May 31, 1998...................................................         53
 
Report of Independent Accountants......................................................         73
</TABLE>
 
                                       2
<PAGE>
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
THE FUND
 
    The Fund is a trust of the type commonly known as a "Massachusetts business
trust" and was organized under the laws of the Commonwealth of Massachusetts on
April 21, 1994 under the name Dean Witter International SmallCap Fund. On June
22, 1998, the Trustees of the Fund adopted an Amendment to the Declaration of
Trust of the Fund changing the name of the Fund to Morgan Stanley Dean Witter
International SmallCap Fund.
 
THE INVESTMENT MANAGER
 
    Morgan Stanley Dean Witter Advisors Inc. (the "Investment Manager" or "MSDW
Advisors"), a Delaware corporation, whose address is Two World Trade Center, New
York, New York 10048, is the Fund's Investment Manager. MSDW Advisors is a
wholly-owned subsidiary of Morgan Stanley Dean Witter & Co. ("MSDW"), a Delaware
corporation. The daily management of the Fund and research relating to the
Fund's portfolio are conducted by or under the direction of officers of the Fund
and of the Investment Manager, subject to review by the Fund's Trustees.
Information as to these Trustees and officers is contained under the caption
"Trustees and Officers."
 
    MSDW Advisors is the investment manager or investment advisor of the
following investment companies, which are collectively referred to as the
"Morgan Stanley Dean Witter Funds":
 
<TABLE>
<CAPTION>
OPEN-END FUNDS
 
<C>        <S>
        1  Active Assets California Tax-Free Trust
        2  Active Assets Government Securities Trust
        3  Active Assets Money Trust
        4  Active Assets Tax-Free Trust
        5  Morgan Stanley Dean Witter American Value Fund
        6  Morgan Stanley Dean Witter Balanced Growth Fund
        7  Morgan Stanley Dean Witter Balanced Income Fund
        8  Morgan Stanley Dean Witter California Tax-Free Daily Income Trust
        9  Morgan Stanley Dean Witter California Tax-Free Income Fund
       10  Morgan Stanley Dean Witter Capital Appreciation Fund
       11  Morgan Stanley Dean Witter Capital Growth Securities
       12  Morgan Stanley Dean Witter Competitive Edge Fund, "BEST IDEAS" Portfolio
       13  Morgan Stanley Dean Witter Convertible Securities Trust
       14  Morgan Stanley Dean Witter Developing Growth Securities Trust
       15  Morgan Stanley Dean Witter Diversified Income Trust
       16  Morgan Stanley Dean Witter Dividend Growth Securities Inc.
       17  Morgan Stanley Dean Witter Equity Fund
       18  Morgan Stanley Dean Witter European Growth Fund Inc.
       19  Morgan Stanley Dean Witter Federal Securities Trust
       20  Morgan Stanley Dean Witter Financial Services Trust
       21  Morgan Stanley Dean Witter Fund of Funds
       22  Dean Witter Global Asset Allocation Fund
       23  Morgan Stanley Dean Witter Global Dividend Growth Securities
       24  Morgan Stanley Dean Witter Global Short-Term Income Fund Inc.
       25  Morgan Stanley Dean Witter Global Utilities Fund
       26  Morgan Stanley Dean Witter Growth Fund
       27  Morgan Stanley Dean Witter Hawaii Municipal Trust
       28  Morgan Stanley Dean Witter Health Sciences Trust
       29  Morgan Stanley Dean Witter High Yield Securities Inc.
       30  Morgan Stanley Dean Witter Income Builder Fund
       31  Morgan Stanley Dean Witter Information Fund
</TABLE>
 
                                       3
<PAGE>
<TABLE>
<C>        <S>
       32  Morgan Stanley Dean Witter Intermediate Income Securities
       33  Morgan Stanley Dean Witter Intermediate Term U.S. Treasury Trust
       34  Morgan Stanley Dean Witter International SmallCap Fund
       35  Morgan Stanley Dean Witter Japan Fund
       36  Morgan Stanley Dean Witter Limited Term Municipal Trust
       37  Morgan Stanley Dean Witter Liquid Asset Fund Inc.
       38  Morgan Stanley Dean Witter Market Leader Trust
       39  Morgan Stanley Dean Witter Mid-Cap Dividend Growth Securities
       40  Morgan Stanley Dean Witter Mid-Cap Growth Fund
       41  Morgan Stanley Dean Witter Multi-State Municipal Series Trust
       42  Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
       43  Morgan Stanley Dean Witter New York Municipal Money Market Trust
       44  Morgan Stanley Dean Witter New York Tax-Free Income Fund
       45  Morgan Stanley Dean Witter Pacific Growth Fund Inc.
       46  Morgan Stanley Dean Witter Precious Metals and Minerals Trust
       47  Dean Witter Retirement Series
       48  Morgan Stanley Dean Witter Select Dimensions Investment Series
       49  Morgan Stanley Dean Witter Select Municipal Reinvestment Fund
       50  Morgan Stanley Dean Witter Short-Term Bond Fund
       51  Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust
       52  Morgan Stanley Dean Witter Special Value Fund
       53  Morgan Stanley Dean Witter S&P 500 Index Fund
       54  Morgan Stanley Dean Witter Strategist Fund
       55  Morgan Stanley Dean Witter Tax-Exempt Securities Trust
       56  Morgan Stanley Dean Witter Tax-Free Daily Income Trust
       57  Morgan Stanley Dean Witter U.S. Government Money Market Trust
       58  Morgan Stanley Dean Witter U.S. Government Securities Trust
       59  Morgan Stanley Dean Witter Utilities Fund
       60  Morgan Stanley Dean Witter Value-Added Market Series
       61  Morgan Stanley Dean Witter Variable Investment Series
       62  Morgan Stanley Dean Witter World Wide Income Trust
<CAPTION>
 
CLOSED-END FUNDS
<C>        <S>
 
        1  InterCapital California Insured Municipal Income Trust
        2  InterCapital California Quality Municipal Securities
        3  Dean Witter Government Income Trust
        4  High Income Advantage Trust
        5  High Income Advantage Trust II
        6  High Income Advantage Trust III
        7  InterCapital Income Securities Inc.
        8  InterCapital Insured California Municipal Securities
        9  InterCapital Insured Municipal Bond Trust
       10  InterCapital Insured Municipal Income Trust
       11  InterCapital Insured Municipal Securities
       12  InterCapital Insured Municipal Trust
       13  Municipal Income Opportunities Trust
       14  Municipal Income Opportunities Trust II
       15  Municipal Income Opportunities Trust III
       16  Municipal Income Trust
       17  Municipal Income Trust II
       18  Municipal Income Trust III
       19  Municipal Premium Income Trust
</TABLE>
 
                                       4
<PAGE>
<TABLE>
<C>        <S>
       20  InterCapital New York Quality Municipal Securities
       21  Morgan Stanley Dean Witter Prime Income Trust
       22  InterCapital Quality Municipal Income Trust
       23  InterCapital Quality Municipal Investment Trust
       24  InterCapital Quality Municipal Securities
</TABLE>
 
    In addition, Morgan Stanley Dean Witter Services Company Inc. ("MSDW
Services"), a wholly-owned subsidiary of MSDW Advisors, serves as manager for
the following investment companies for which TCW Funds Management, Inc. is the
investment advisor (the "TCW/DW Funds"):
<TABLE>
<CAPTION>
OPEN-END FUNDS
 
<C>        <S>
        1  TCW/DW Emerging Markets Opportunities Trust
        2  TCW/DW Global Telecom Trust
        3  TCW/DW Income and Growth Fund
        4  TCW/DW Latin American Growth Fund
        5  TCW/DW Mid-Cap Equity Trust
        6  TCW/DW North American Government Income Trust
        7  TCW/DW Small Cap Growth Fund
        8  TCW/DW Total Return Trust
 
<CAPTION>
 
CLOSED-END FUNDS
<C>        <S>
 
        1  TCW/DW Term Trust 2000
        2  TCW/DW Term Trust 2002
        3  TCW/DW Term Trust 2003
</TABLE>
 
    MSDW Advisors also serves as: (i) administrator of The BlackRock Strategic
Term Trust Inc., a closed-end investment company; (ii) sub-administrator of
Templeton Global Governments Income Trust, a closed-end investment company; and
(iii) investment advisor of Offshore Dividend Growth Fund and Offshore Money
Market Fund, mutual funds established under the laws of the Cayman Islands and
available only to investors who are participants in the International Active
Assets Account program and are neither citizens nor residents of the United
States.
 
    Pursuant to an investment management agreement (the "Management Agreement")
with the Investment Manager, the Fund has retained the Investment Manager to
supervise the investment of the Fund's assets. The Investment Manager, through
consultation with Morgan Stanley Asset Management Inc. (the "Sub-Advisor") and
through its own portfolio management staff, obtains and evaluates such
information and advice relating to the economy, securities markets, and specific
securities as it considers necessary or useful to continuously manage the assets
of the Fund in a manner consistent with its investment objective.
 
    Under the terms of the Management Agreement, the Investment Manager
maintains certain of the Fund's books and records and furnishes, at its own
expense, such office space, facilities, equipment, clerical help and bookkeeping
and certain legal services as the Fund may reasonably require in the conduct of
its business, including the preparation of prospectuses, statements of
additional information, proxy statements and reports required to be filed with
federal and state securities commissions (except insofar as the participation or
assistance of independent accountants and attorneys is, in the opinion of the
Investment Manager, necessary or desirable). In addition, the Investment Manager
pays the salaries of all personnel, including officers of the Fund, who are
employees of the Investment Manager. The Investment Manager also bears the cost
of telephone service, heat, light, power and other utilities provided to the
Fund. The Investment Manager has retained MSDW Services to perform its
administrative services under the Agreement.
 
    Expenses not expressly assumed by the Investment Manager under the
Management Agreement, by the Sub-Advisor pursuant to the Sub-Advisory Agreement
(see below) or by the distributor of the Fund's shares, Morgan Stanley Dean
Witter Distributors Inc. ("MSDW Distributors" or the "Distributor")
 
                                       5
<PAGE>
(see "The Distributor") will be paid by the Fund. These expenses will be
allocated among the four classes of shares of the Fund (each, a "Class") pro
rata based on the net assets of the Fund attributable to each Class, except as
described below. Such expenses include, but are not limited to: expenses of the
Plan of Distribution pursuant to Rule 12b-1 (the "12b-1 fee") (see "The
Distributor"); charges and expenses of any registrar; custodian, stock transfer
and dividend disbursing agent; brokerage commissions; taxes; engraving and
printing of share certificates; registration costs of the Fund and its shares
under federal and state securities laws; the cost and expense of printing,
including typesetting, and distributing Prospectuses and Statements of
Additional Information of the Fund and supplements thereto to the Fund's
shareholders; all expenses of shareholders' and trustees' meetings and of
preparing, printing and mailing of proxy statements and reports to shareholders;
fees and travel expenses of trustees or members of any advisory board or
committee who are not employees of the Investment Manager or Sub-Advisor or any
corporate affiliate of the Investment Manager or Sub-Advisor; all expenses
incident to any dividend, withdrawal or redemption options; charges and expenses
of any outside service used for pricing of the Fund's shares; fees and expenses
of legal counsel, including counsel to the trustees who are not interested
persons of the Fund or of the Investment Manager or Sub-Advisor (not including
compensation or expenses of attorneys who are employees of the Investment
Manager) and independent accountants; membership dues of industry associations;
interest on the Fund's borrowings; postage; insurance premiums on property or
personnel (including officers and trustees) of the Fund which inure to its
benefit; extraordinary expenses including, but not limited to, legal claims and
liabilities and litigation costs and any indemnification relating thereto
(depending upon the nature of the legal claim, liability or lawsuit) and all
other costs of the Fund's operations properly payable by the Fund. The 12b-1
fees relating to a particular Class will be allocated directly to that Class. In
addition, other expenses associated with a particular Class (except advisory or
custodial fees) may be allocated directly to that Class, provided that such
expenses are reasonably identified as specifically attributable to that Class
and the direct allocation to that Class is approved by the Trustees.
 
    The Management Agreement provides that in the absence of willful
misfeasance, bad faith, gross negligence or reckless disregard of its obligation
thereunder, the Investment Manager is not liable to the Fund or any of its
investors for any act or omission by the Investment Manager or for any losses
sustained by the Fund or its investors. The Management Agreement in no way
restricts the Investment Manager from acting as investment manager or adviser to
others.
 
    Pursuant to a sub-advisory agreement between the Investment Manager and
Sub-Advisor (the "Sub-Advisory Agreement"), the Sub-Advisor has been retained,
subject to the overall supervision of the Investment Manager and the Trustees of
the Fund, to continuously furnish investment advice concerning individual
security selections, asset allocations and overall economic trends with respect
to international small-cap issuers and to manage the Fund's portfolio subject to
the supervision of the Investment Manager. On occasion, the Sub-Advisor will
also provide the Investment Manager with investment advice concerning potential
investment opportunities for the Fund which are available outside of Asia,
Australia and New Zealand.
 
    Morgan Stanley Asset Management Inc. ("MSAM"), a subsidiary of Morgan
Stanley Dean Witter & Co. and an affiliate of the Investment Manager, whose
address is 1221 Avenue of the Americas, New York, New York 10020, became the
Fund's Sub-Advisor effective December 1, 1997. MSAM, together with its
affiliated asset management companies, conducts a worldwide portfolio management
business and provides a broad range of portfolio management services to
customers in the United States and abroad. As of June 30, 1998 MSAM, together
with its affiliated asset management companies, had approximately $169 billion
in assets under management as an investment manager or as a fiduciary adviser.
MSAM has been managing international securities since 1986.
 
    Prior to November, 1997, the Fund was sub-advised by Morgan Grenfell
Investment Services Limited (the "Former Sub-Advisor") pursuant to a
sub-advisory agreement between the Investment Manager and the Former Sub-Advisor
(the "Prior Sub-Advisory Agreement"). In August 1997, the Former Sub-Advisor
indicated its intention to resign and on August 14, 1997, the Board of Trustees
recommended that the Sub-Advisory Agreement with MSAM described above be
submitted to
 
                                       6
<PAGE>
shareholders for approval. The shareholders of the Fund approved the
Sub-Advisory Agreement on November 25, 1997 and the Sub-Advisory Agreement
became effective on December 1, 1997.
 
    At the same time that the Sub-Advisory Agreement took effect, the Investment
Manager and the Fund amended the Management Agreement between the Investment
Manager and the Fund to reduce the fee paid by the Fund to the Investment
Manager as full compensation for the services and facilities furnished to the
Fund and for expenses of the Fund assumed by the Investment Manager under the
Management Agreement from an annual rate of 1.25% of the Fund's average daily
net assets to 1.15% of the Fund's average daily net assets. The management fee
is allocated among the Classes pro rata based on the net assets of the Fund
attributable to each Class. The Fund accrued total compensation to the
Investment Manager of $1,410,200, $1,584,086 and $985,364 during the fiscal
years ended May 31, 1996, May 31, 1997 and May 31, 1998, respectively.
 
    Both the Investment Manager and the Sub-Advisor have authorized any of their
directors, officers and employees who have been elected as Trustees or officers
of the Fund to serve in the capacities in which they have been elected. Services
furnished by the Investment Manager and the Sub-Advisor may be furnished by
directors, officers and employees of the Investment Manager and the Sub-Advisor.
In connection with the services rendered by the Sub-Advisor, the Sub-Advisor
bears the following expenses: (a) the salaries and expenses of its personnel;
and (b) all expenses incurred by it in connection with performing the services
provided by it as Sub-Advisor, as described above.
 
    As full compensation for the services and facilities furnished to the Fund
and the Investment Manager and expenses of the Fund and the Investment Manager
assumed by the Sub-Advisor, the Investment Manager pays the Sub-Advisor monthly
compensation equal to 40% of the Investment Manager's monthly compensation
payable under the Management Agreement. The Investment Manager has informed the
Fund that it accrued total compensation to the Former Sub-Advisor of $564,080
and $633,634 during the fiscal years ended May 31, 1996 and May 31, 1997,
respectively. The Investment Manager has informed the Fund that during the
fiscal year ended May 31, 1998, it accrued total compensation to the Former
Sub-Advisor of $234,354 and that it accrued total compensation to MSAM of
$159,791.
 
    The Investment Manager paid the organizational expenses of the Fund incurred
prior to the offering of the Fund's shares. The Fund has reimbursed the
Investment Manager for such expenses in accordance with the terms of the
Underwriting Agreement between the Fund and Distributors. The Fund is deferring
and amortizing the organizational expenses on the straight line method over a
period not to exceed five years from the date of commencement of the Fund's
operations.
 
    The Management Agreement and the Former Sub-Advisory Agreement were
initially approved by the Trustees on February 21, 1997 and by the shareholders
of the Fund at a Special Meeting of Shareholders held on May 21, 1997. The
Management Agreement is and the Former Sub-Advisory Agreement was substantially
identical to prior investment management and sub-advisory agreements which were
initially approved by the Board of Trustees on May 10, 1996 and by InterCapital
as the then sole shareholder on June 2, 1996. The Management Agreement and the
Former Sub-Advisory Agreement took effect on May 31, 1997 upon the consummation
of the merger of Dean Witter, Discover & Co. with Morgan Stanley Group Inc. As
noted above, the current Sub-Advisory Agreement between the Investment Manager
and MSAM was initially approved by the Trustees on August 14, 1997 and
subsequently by the shareholders of the Fund at a Special Meeting of
Shareholders on November 25, 1997. The terms of the Sub-Advisory Agreement are
identical, in all material respects, to the Former Sub-Advisory Agreement,
except for the dates of effectiveness and termination and the deletion of a
provision pursuant to which the Former Sub-Advisor and its affiliates were
prohibited from acting as investment adviser or sub-adviser to funds that are
similar to the Fund. The Management Agreement and the Sub-Advisory Agreement
(the "Agreements") may be terminated at any time, without penalty, on thirty
days' notice by the Board of Trustees of the Fund, by the holders of a majority,
as defined in the Investment Company Act of 1940 (the "Act"), of the outstanding
shares of the Fund, or by the Investment Manager. The Agreements will
automatically terminate in the event of their assignment (as defined in the
Act).
 
                                       7
<PAGE>
    Under their terms, the Agreements have an initial term ending April 30,
1999, and will remain in effect from year to year thereafter, provided
continuance of the Agreements is approved at least annually by the vote of the
holders of a majority of the outstanding shares of the Fund, as defined in the
Act, or by the Trustees of the Fund; provided that in either event such
continuance is approved annually by the vote of a majority of the Trustees of
the Fund who are not parties to the Agreement or "interested persons" (as
defined in the Act) of any such party (the "Independent Trustees"), which vote
must be cast in person at a meeting called for the purpose of voting on such
approval.
 
    The following owned 5% or more of the outstanding shares of Class A on July
8, 1998: Dean Witter Reynolds Custodian for Michael C. Brown, IRA DTD 4/7/83,
2215 Oliver Ave. So. Minneapolis MN, 55405-2444--9.76%; The Chance Living Trust,
Milton E. Chance & Milton E. Chance Jr. DTD 6/24/92, 271 Village Lane, Greenwood
IN, 46143-2437--8.53%. The following owned 25% or more of the outstanding shares
of Class A on July 8, 1998: WB Davis Electric Supply Co., P/S/T DTD 1/1/76, 527
N. Hollywood, Memphis TN, 38105--27.46%; Insulation and Refractories SVC Inc.,
P/S/T U/A DTD JG Whitsett, JW Whitsett, Freddie Veteto, Mary Harri, Carl W.
Kovell TTEES, 462 Decatur, Memphis TN, 38105--37.68%. The following owned 5% or
more of the outstanding shares of Class C on July 8, 1998: MSDW Advisors Inc.,
Attn: Maurice Bendrhem, 2 World Trade Center, New York NY, 10048--12.33%; Gary
L. Dushane & Barbara A. Dushane JTTEN, 3905 Calle Olivo NE, Albuquerque NM,
87111-4340-- 12.33%; Dean Witter Reynolds custodian for Arnold Sesma, IRA
STD/Rollover DTD 7/30/96, 2318 E. Portland, Phoenix AZ, 85006-3153--12.17%; Dean
Witter Reynolds custodian for Henry H. Duke, IRA STD DTD 3/8/83, 1426 Newporter
Way, Newport Beach CA, 92660-8205--9.84%; Joan Hollenbeck, 128 Windward Rd.,
East Hampton NY, 11937-3189--6.98%; Mr. David Feinrider, 190-38A 69th Ave Apt.
2A, Freshmeadows NY, 11365--6.81%; Clare L. Gillespie & Jerelyn D. Gillespie
Tencom, 4417 Old Seward Hwy., Anchorage AK, 99503-7411--6.28%; Dean Witter
Reynolds custodian for Joseph L. Harter, IRA Rollover 9/4/96, 34530 Minneola
Rd., Daggett CA, 92327-9769--5.64%. The following owned 25% or more of the
outstanding shares of Class D on July 8, 1998: Hare & Co., c/o The Bank of New
York, PO Box 11203, New York NY, 10286-1203--95.67%.
 
    The Fund has acknowledged that the name "Morgan Stanley Dean Witter" is a
property right of MSDW. The Fund has agreed that MSDW, or any corporate
affiliate of MSDW, may use, or at any time permit others to use, the name
"Morgan Stanley Dean Witter." The Fund has also agreed that in the event the
Management Agreement is terminated, or if the affiliation between MSDW Advisors
and its parent is terminated, the Fund will eliminate the name "Morgan Stanley
Dean Witter" from its name if MSDW, or any corporate affiliate of MSDW, shall so
request.
 
                                       8
<PAGE>
TRUSTEES AND OFFICERS
- --------------------------------------------------------------------------------
 
    The Trustees and Executive Officers of the Fund, their principal business
occupations during the last five years and their affiliations, if any, with MSDW
Advisors, and with the 86 Morgan Stanley Dean Witter Funds and the 11 TCW/DW
Funds are shown below:
 
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND AND ADDRESS                PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- ------------------------------------------------------  ----------------------------------------------------------
<S>                                                     <C>
Michael Bozic (57) ...................................  Chairman and Chief Executive Officer of Levitz Furniture
Trustee                                                 Corporation (since November, 1995); Director or Trustee of
c/o Levitz Furniture Corporation                        the Morgan Stanley Dean Witter Funds; formerly President
7887 N. Federal Highway                                 and Chief Executive Officer of Hills Department Stores
Boca Raton, Florida                                     (May, 1991-July, 1995); formerly variously Chairman, Chief
                                                        Executive Officer, President and Chief Operating Officer
                                                        (1987-1991) of the Sears Merchandise Group of Sears,
                                                        Roebuck and Co.; Director of Eaglemark Financial Services,
                                                        Inc. and Weirton Steel Corporation.
 
Charles A. Fiumefreddo* (65) .........................  Chairman, Director or Trustee, President and Chief
Chairman of the Board,                                  Executive Officer of the Morgan Stanley Dean Witter Funds;
President and Chief Executive                           Chairman, Chief Executive Officer and Trustee of the
Officer and Trustee                                     TCW/DW Funds; formerly Chairman, Chief Executive Officer
Two World Trade Center                                  and Director of MSDW Advisors, MSDW Distributors and MSDW
New York, New York                                      Services, Executive Vice President and Director of Dean
                                                        Witter Reynolds Inc. ("DWR"), Chairman and Director of
                                                        Morgan Stanley Dean Witter Trust FSB ("MSDW Trust"), and
                                                        Director and/or officer of various MSDW subsidiaries
                                                        (until June, 1998).
 
Edwin J. Garn (65) ...................................  Director or Trustee of the Morgan Stanley Dean Witter
Trustee                                                 Funds; formerly United States Senator (R- Utah)
c/o Huntsman Corporation                                (1974-1992) and Chairman, Senate Banking Committee
500 Huntsman Way                                        (1980-1986); formerly Mayor of Salt Lake City, Utah
Salt Lake City, Utah                                    (1972-1974); formerly Astronaut, Space Shuttle Discovery
                                                        (April 12-19, 1985); Vice Chairman, Huntsman Corporation
                                                        (since January, 1993); Director of Franklin Covey (time
                                                        management systems), John Alden Financial Corp (health
                                                        insurance), United Space Alliance (joint venture between
                                                        Lockheed Martin and the Boeing Company) and Nuskin Asia
                                                        Pacific (multilevel marketing); Member of the board of
                                                        various civic and charitable organizations.
 
John R. Haire (73) ...................................  Chairman of the Audit Committee and Director or Trustee of
Trustee                                                 the Morgan Stanley Dean Witter Funds; formerly Chairman of
Two World Trade Center                                  the Independent Directors or Trustees of the Morgan
New York, New York                                      Stanley Dean Witter Funds and the TCW/DW Funds (until
                                                        June, 1998); formerly President, Council for Aid to
                                                        Education (1978-1989) and Chairman and Chief Executive
                                                        Officer of Anchor Corporation, an Investment Adviser
                                                        (1964-1978).
</TABLE>
 
                                       9
<PAGE>
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND AND ADDRESS                PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- ------------------------------------------------------  ----------------------------------------------------------
<S>                                                     <C>
Wayne E. Hedien (64) .................................  Retired, Director or Trustee of the Morgan Stanley Dean
Trustee                                                 Witter Funds; Director of The PMI Group, Inc. (private
c/o Gordon Altman Butowsky                              mortgage insurance); Trustee and Vice Chairman of The
 Weitzen Shalov & Wein                                  Field Museum of Natural History; formerly associated with
Counsel to the Independent Trustees                     the Allstate Companies (1966-1994), most recently as
114 West 47th Street                                    Chairman of The Allstate Corporation (March,
New York, New York                                      1993-December, 1994) and Chairman and Chief Executive
                                                        Officer of its wholly-owned subsidiary, Allstate Insurance
                                                        Company (July, 1989-December, 1994); director of various
                                                        other business and charitable organizations.
 
Dr. Manuel H. Johnson (49) ...........................  Senior Partner, Johnson Smick International, Inc., a
Trustee                                                 consulting firm; Co-Chairman and a founder of the Group of
c/o Johnson Smick International, Inc.                   Seven Council (G7C), an international economic commission;
1133 Connecticut Avenue, N.W.                           Director or Trustee of the Morgan Stanley Dean Witter
Washington, DC                                          Funds; Trustee of the TCW/DW Funds; Director of NASDAQ
                                                        (since June, 1995); Director of Greenwich Capital Markets,
                                                        Inc. (broker-dealer) and NVR, Inc. (home construction);
                                                        Chairman and Trustee of the Financial Accounting
                                                        Foundation (oversight organization of the Financial
                                                        Accounting Standards Board); formerly Vice Chairman of the
                                                        Board of Governors of the Federal Reserve System
                                                        (1986-1990) and Assistant Secretary of the U.S. Treasury.
 
Michael E. Nugent (62) ...............................  General Partner, Triumph Capital, L.P., a private
Trustee                                                 investment partnership; Director or Trustee of the Morgan
c/o Triumph Capital, L.P.                               Stanley Dean Witter Funds; Trustee of the TCW/DW Funds;
237 Park Avenue                                         formerly Vice President, Bankers Trust Company and BT
New York, New York                                      Capital Corporation; Director of various business
                                                        organizations.
 
Philip J. Purcell* (54) ..............................  Chairman of the Board of Directors and Chief Executive
Trustee                                                 Officer of MSDW, DWR and Novus Credit Services Inc.;
1585 Broadway                                           Director of MSDW Distributors; Director or Trustee of the
New York, New York                                      Morgan Stanley Dean Witter Funds; Director and/or officer
                                                        of various MSDW subsidiaries.
 
John L. Schroeder (67) ...............................  Retired; Director or Trustee of the Morgan Stanley Dean
Trustee                                                 Witter Funds; Trustee of the TCW/DW Funds; Director of
c/o Gordon Altman Butowsky                              Citizens Utilities Company; formerly Executive Vice
Weitzen Shalov & Wein                                   President and Chief Investment Officer of the Home
Counsel to the Independent Trustees                     Insurance Company (August, 1991-September, 1995).
114 West 47th Street
</TABLE>
 
                                       10
<PAGE>
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND AND ADDRESS                PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
- ------------------------------------------------------  ----------------------------------------------------------
<S>                                                     <C>
Barry Fink (43) ......................................  Senior Vice President (since March, 1997), Secretary and
Vice President, Secretary                               General Counsel (since February, 1997) and Director (since
 and General Counsel                                    July, 1998) of MSDW Advisors and MSDW Services; Senior
Two World Trade Center                                  Vice President (since March, 1997) and Assistant Secretary
New York, New York                                      and Assistant General Counsel (since February, 1997) of
                                                        MSDW Distributors; Assistant Secretary of DWR (since
                                                        August, 1996); Vice President, Secretary and General
                                                        Counsel of the Morgan Stanley Dean Witter Funds and the
                                                        TCW/DW Funds (since February, 1997); previously First Vice
                                                        President (June, 1993-February, 1997), Vice President
                                                        (until June, 1993) and Assistant Secretary and Assistant
                                                        General Counsel of MSDW Advisors and MSDW Services and
                                                        Assistant Secretary of the Morgan Stanley Dean Witter
                                                        Funds and the TCW/DW Funds.
 
Thomas F. Caloia (52) ................................  First Vice President and Assistant Treasurer of MSDW
Treasurer                                               Advisors and MSDW Services; Treasurer of the Morgan
Two World Trade Center                                  Stanley Dean Witter Funds and the TCW/DW Funds.
New York, New York
</TABLE>
 
- ------------------------
 *  Denotes Trustees who are "interested persons" of the Fund, as defined in the
    Act.
 
    In addition, Mitchell M. Merin, President, Chief Executive Officer and
Director of MSDW Advisors and MSDW Services, Chairman and Director of MSDW
Distributors and MSDW Trust, Executive Vice President and Director of DWR, and
Director of SPS Transaction Services, Inc. and various other MSDW subsidiaries,
Robert M. Scanlan, President, Chief Operating Officer and Director of MSDW
Advisors and MSDW Services, Executive Vice President of MSDW Distributors and
MSDW Trust and Director of MSDW Trust, Robert S. Giambrone, Senior Vice
President of MSDW Advisors, MSDW Services, MSDW Distributors and MSDW Trust and
Director of MSDW Trust, Joseph J. McAlinden, Executive Vice President and Chief
Investment Officer of MSDW Advisors and Director of MSDW Trust, are Vice
Presidents of the Fund, and Marilyn K. Cranney and Carsten Otto, First Vice
Presidents and Assistant General Counsels of MSDW Advisors and MSDW Services,
Frank Bruttomesso, LouAnne D. McInnis and Ruth Rossi, Vice Presidents and
Assistant General Counsels of MSDW Advisors and MSDW Services, and Todd Lebo, a
staff attorney with MSDW Advisors, are Assistant Secretaries of the Fund.
 
THE BOARD OF TRUSTEES, THE INDEPENDENT TRUSTEES, AND THE COMMITTEES
 
    The Board of Trustees consists of nine (9) trustees. These same individuals
also serve as directors or trustees for all of the Morgan Stanley Dean Witter
Funds, and are referred to in this section as Trustees. As of the date of this
Statement of Additional Information, there are a total of 86 Morgan Stanley Dean
Witter Funds, comprised of 132 portfolios. As of June 30, 1998, the Morgan
Stanley Dean Witter Funds had total net assets of approximately $106.8 billion
and more than six million shareholders.
 
    Seven Trustees (77% of the total number) have no affiliation or business
connection with MSDW Advisors or any of its affiliated persons and do not own
any stock or other securities issued by MSDW Advisors' parent company, MSDW.
These are the "disinterested" or "independent" Trustees. Four of the seven
independent Trustees are also Independent Trustees of the TCW/DW Funds.
 
    Law and regulation establish both general guidelines and specific duties for
the Independent Trustees. The Morgan Stanley Dean Witter Funds seek as
Independent Trustees individuals of distinction and experience in business and
finance, government service or academia; these are people whose advice and
counsel are in demand by others and for whom there is often competition. To
accept a position on the Funds' Boards, such individuals may reject other
attractive assignments because the
 
                                       11
<PAGE>
Funds make substantial demands on their time. Indeed, by serving on the Funds'
Boards, certain Trustees who would otherwise be qualified and in demand to serve
on bank boards would be prohibited by law from doing so.
 
    All of the Independent Trustees serve as members of the Audit Committee.
Three of them also serve as members of the Derivatives Committee. During the
calendar year ended December 31, 1997, the Audit Committee, the Derivatives
Committee and the Independent Trustees held a combined total of seventeen
meetings.
 
    The Independent Trustees are charged with recommending to the full Board
approval of management, advisory and administration contracts, Rule 12b-1 plans
and distribution and underwriting agreements; continually reviewing Fund
performance; checking on the pricing of portfolio securities, brokerage
commissions, transfer agent costs and performance, and trading among Funds in
the same complex; and approving fidelity bond and related insurance coverage and
allocations, as well as other matters that arise from time to time. The
Independent Trustees are required to select and nominate individuals to fill any
Independent Trustee vacancy on the Board of any Fund that has a Rule 12b-1 plan
of distribution. Most of the Morgan Stanley Dean Witter Funds have such a plan.
 
    The Audit Committee is charged with recommending to the full Board the
engagement or discharge of the Fund's independent accountants; directing
investigations into matters within the scope of the independent accountants'
duties, including the power to retain outside specialists; reviewing with the
independent accountants the audit plan and results of the auditing engagement;
approving professional services provided by the independent accountants and
other accounting firms prior to the performance of such services; reviewing the
independence of the independent accountants; considering the range of audit and
non-audit fees; and reviewing the adequacy of the Fund's system of internal
controls.
 
    Finally, the Board of each Fund has formed a Derivatives Committee to
approve parameters for and monitor the activities of the Fund with respect to
derivative investments, if any, made by the Fund.
 
ADVANTAGES OF HAVING SAME INDIVIDUALS AS INDEPENDENT TRUSTEES FOR ALL MORGAN
STANLEY DEAN WITTER FUNDS
 
    The Independent Trustees and the Funds' management believe that having the
same Independent Trustees for each of the Morgan Stanley Dean Witter Funds
avoids the duplication of effort that would arise from having different groups
of individuals serving as Independent Trustees for each of the Funds or even of
sub-groups of Funds. They believe that having the same individuals serve as
Independent Trustees of all the Funds tends to increase their knowledge and
expertise regarding matters which affect the Fund complex generally and enhances
their ability to negotiate on behalf of each Fund with the Fund's service
providers. This arrangement also precludes the possibility of separate groups of
Independent Trustees arriving at conflicting decisions regarding operations and
management of the Funds and avoids the cost and confusion that would likely
ensue. Finally, having the same Independent Trustees serve on all Fund Boards
enhances the ability of each Fund to obtain, at modest cost to each separate
Fund, the services of Independent Trustees of the caliber, experience and
business acumen of the individuals who serve as Independent Trustees of the
Morgan Stanley Dean Witter Funds.
 
COMPENSATION OF INDEPENDENT TRUSTEES
 
    The Fund pays each Independent Trustee an annual fee of $800 plus a per
meeting fee of $50 for meetings of the Board of Trustees, the Independent
Trustees or Committees of the Board of Trustees attended by the Trustee (the
Fund pays the Chairman of the Audit Committee an additional annual fee of $750).
If a Board meeting and a meeting of the Independent Trustees or a Committee
meeting, or a meeting of the Independent Trustees and/or more than one Committee
meeting, take place on a single day, the Trustees are paid a single meeting fee
by the Fund. The Fund also reimburses such Trustees for travel and other
out-of-pocket expenses incurred by them in connection with attending such
meetings. Trustees and officers of the Fund who are or have been employed by the
Investment Manager or an affiliated company receive no compensation or expense
reimbursement from the Fund for their services as Trustee. Mr. Haire currently
serves as Chairman of the Audit Committee. Prior to June 1, 1998,
 
                                       12
<PAGE>
Mr. Haire also served as Chairman of the Independent Trustees, for which
services the Fund paid him an additional annual fee of $1,200.
 
    The following table illustrates the compensation paid to the Fund's
Independent Trustees by the Fund for the fiscal year ended May 31, 1998.
 
                               FUND COMPENSATION
 
<TABLE>
<CAPTION>
                                                                 AGGREGATE
                                                                COMPENSATION
                                                                 FROM THE
NAME OF INDEPENDENT TRUSTEE                                        FUND
- --------------------------------------------------------------  -----------
 
<S>                                                             <C>
Michael Bozic.................................................      $1,700
 
Edwin J. Garn.................................................       1,850
 
John R. Haire.................................................       3,700
 
Wayne E. Hedien...............................................       1,382
 
Dr. Manuel H. Johnson.........................................       1,800
 
Michael E. Nugent.............................................       1,850
 
John L. Schroeder.............................................       1,850
</TABLE>
 
    The following table illustrates the compensation paid to the Fund's
Independent Trustees for the calendar year ended December 31, 1997 for services
to the 84 Morgan Stanley Dean Witter Funds and, in the case of Messrs. Haire,
Johnson, Nugent and Schroeder, the 14 TCW/DW Funds that were in operation at
December 31, 1997. Mr. Haire serves as Chairman of the Audit Committee of each
Morgan Stanley Dean Witter Fund and each TCW/DW Fund and, prior to June 1, 1998,
also served as Chairman of the Independent Directors or Trustees of those Funds.
With respect to Messrs. Haire, Johnson, Nugent and Schroeder, the TCW/DW Funds
are included solely because of a limited exchange privilege between those Funds
and five Morgan Stanley Dean Witter Money Market Funds. Mr. Hedien's term as
Director or Trustee of each Morgan Stanley Dean Witter Fund commenced on
September 1, 1997.
 
    CASH COMPENSATION FROM MORGAN STANLEY DEAN WITTER FUNDS AND TCW/DW FUNDS
 
<TABLE>
<CAPTION>
                                                                   FOR SERVICE AS                    TOTAL CASH
                                                                    CHAIRMAN OF      FOR SERVICE    COMPENSATION
                               FOR SERVICE                          INDEPENDENT          AS              FOR
                              AS DIRECTOR OR                       DIRECTORS/TRUSTEES  CHAIRMAN OF   SERVICES TO
                               TRUSTEE AND                           AND AUDIT       INDEPENDENT         84
                                COMMITTEE        FOR SERVICE AS    COMMITTEES OF      TRUSTEES         MORGAN
                               MEMBER OF 84       TRUSTEE AND            84           AND AUDIT        STANLEY
                              MORGAN STANLEY       COMMITTEE       MORGAN STANLEY   COMMITTEES OF    DEAN WITTER
NAME OF                        DEAN WITTER        MEMBER OF 14      DEAN WITTER          14         FUNDS AND 14
INDEPENDENT TRUSTEE               FUNDS           TCW/DW FUNDS         FUNDS        TCW/DW FUNDS    TCW/DW FUNDS
- ---------------------------  ----------------   ----------------   --------------   -------------   -------------
 
<S>                          <C>                <C>                <C>              <C>             <C>
Michael Bozic..............      $133,602           --                 --               --            $133,602
 
Edwin J. Garn..............       149,702           --                 --               --             149,702
 
John R. Haire..............       149,702           $73,725           $157,463        $ 25,350         406,240
 
Wayne E. Hedien............        39,010           --                 --               --              39,010
 
Dr. Manuel H. Johnson......       145,702            71,125            --               --             216,827
 
Michael E. Nugent..........       149,702            73,725            --               --             223,427
 
John L. Schroeder..........       149,702            73,725            --               --             223,427
</TABLE>
 
    As of the date of this Statement of Additional Information, 57 of the Morgan
Stanley Dean Witter Funds, not including the Fund, have adopted a retirement
program under which an Independent Trustee who retires after serving for at
least five years (or such lesser period as may be determined by the Board) as an
Independent Director or Trustee of any Morgan Stanley Dean Witter Fund that has
adopted the retirement program (each such Fund referred to as an "Adopting Fund"
and each such Trustee referred to as an "Eligible Trustee") is entitled to
retirement payments upon reaching the eligible retirement age
 
                                       13
<PAGE>
(normally, after attaining age 72). Annual payments are based upon length of
service. Currently, upon retirement, each Eligible Trustee is entitled to
receive from the Adopting Fund, commencing as of his or her retirement date and
continuing for the remainder of his or her life, an annual retirement benefit
(the "Regular Benefit") equal to 29.41% of his or her Eligible Compensation plus
0.4901667% of such Eligible Compensation for each full month of service as an
Independent Director or Trustee of any Adopting Fund in excess of five years up
to a maximum of 58.82% after ten years of service. The foregoing percentages may
be changed by the Board.(1) "Eligible Compensation" is one-fifth of the total
compensation earned by such Eligible Trustee for service to the Adopting Fund in
the five year period prior to the date of the Eligible Trustee's retirement.
Benefits under the retirement program are not secured or funded by the Adopting
Funds.
 
    The following table illustrates the retirement benefits accrued to the
Fund's Independent Trustees by the 57 Morgan Stanley Dean Witter Funds (not
including the Fund) for the year ended December 31, 1997, and the estimated
retirement benefits for the Fund's Independent Trustees, to commence upon their
retirement, from the 57 Morgan Stanley Dean Witter Funds as of December 31,
1997.
 
         RETIREMENT BENEFITS FROM ALL MORGAN STANLEY DEAN WITTER FUNDS
 
<TABLE>
<CAPTION>
                                                                                                             ESTIMATED
                                                                                              RETIREMENT      ANNUAL
                                                                                               BENEFITS      BENEFITS
                                                            ESTIMATED                         ACCRUED AS       UPON
                                                         CREDITED YEARS        ESTIMATED       EXPENSES     RETIREMENT
                                                          OF SERVICE AT      PERCENTAGE OF      BY ALL       FROM ALL
                                                           RETIREMENT          ELIGIBLE        ADOPTING      ADOPTING
NAME OF INDEPENDENT TRUSTEE                               (MAXIMUM 10)       COMPENSATION       FUNDS        FUNDS(2)
- -----------------------------------------------------  -------------------  ---------------  ------------   -----------
 
<S>                                                    <C>                  <C>              <C>            <C>
Michael Bozic........................................              10             58.82%     $20,499         $  55,026
 
Edwin J. Garn........................................              10             58.82       30,878            55,026
 
John R. Haire........................................              10             58.82      (19,823)(3)       132,002
 
Wayne E. Hedien......................................               9             50.00            0            46,772
 
Dr. Manuel H. Johnson................................              10             58.82       12,832            55,026
 
Michael E. Nugent....................................              10             58.82       22,546            55,026
 
John L. Schroeder....................................               8             49.02       39,350            46,123
</TABLE>
 
- ------------------------
(1) An Eligible Trustee may elect alternate payments of his or her retirement
    benefits based upon the combined life expectancy of such Eligible Trustee
    and his or her spouse on the date of such Eligible Trustee's retirement. The
    amount estimated to be payable under this method, through the remainder of
    the later of the lives of such Eligible Trustee and spouse, will be the
    actuarial equivalent of the Regular Benefit. In addition, the Eligible
    Trustee may elect that the surviving spouse's periodic payment of benefits
    will be equal to either 50% or 100% of the previous periodic amount, an
    election that, respectively, increases or decreases the previous periodic
    amount so that the resulting payments will be the actuarial equivalent of
    the Regular Benefit.
 
(2) Based on current levels of compensation. Amount of annual benefits also
    varies depending on the Trustee's elections described in Footnote (1) above.
 
(3) This number reflects the effect of the extension of Mr. Haire's term as
    Director or Trustee until May 1, 1999.
 
    As of the date of this Statement of Additional Information, the aggregate
number of shares of beneficial interest of the Fund owned by the Fund's officers
and Trustees as a group was less than 1 percent of the Fund's shares of
beneficial interest outstanding.
 
INVESTMENT PRACTICES AND POLICIES
- --------------------------------------------------------------------------------
 
    The Fund is currently managed as a diversified investment company.
 
    FORWARD FOREIGN CURRENCY EXCHANGE CONTRACTS.  As discussed in the
Prospectus, the Fund may enter into forward foreign currency exchange contracts
("forward contracts") as a hedge against
 
                                       14
<PAGE>
fluctuations in future foreign exchange rates. The Fund will conduct its foreign
currency exchange transactions either on a spot (i.e., cash) basis at the spot
rate prevailing in the foreign currency exchange market, or through entering
into forward contracts to purchase or sell foreign currencies. A forward
contract involves an obligation to purchase or sell a specific currency at a
future date, which may be any fixed number of days from the date of the contract
agreed upon by the parties, at a price set at the time of the contract. These
contracts are traded in the interbank market conducted directly between currency
traders (usually large, commercial and investment banks) and their customers.
Such forward contracts will only be entered into with United States banks and
their foreign branches or foreign banks whose assets total $1 billion or more. A
forward contract generally has no deposit requirement, and no commissions are
charged at any stage for trades.
 
    When management of the Fund believes that a particular foreign currency may
suffer a substantial movement against the U.S. dollar, it may enter into a
forward contract to purchase or sell, for a fixed amount of dollars or other
currency, the amount of foreign currency approximating the value of some or all
of the Fund's portfolio securities denominated in such foreign currency. The
Fund will not enter into such forward contracts or maintain a net exposure to
such contracts where the consummation of the contracts would obligate the Fund
to deliver an amount of foreign currency in excess of the value of the Fund's
portfolio securities or other assets denominated in that currency. Under normal
circumstances, consideration of the prospect for currency parities will be
incorporated into the longer term investment decisions made with regard to
overall diversification strategies. However, management of the Fund believes
that it is important to have the flexibility to enter into such forward
contracts when it determines that the best interests of the Fund will be served.
The Fund's custodian bank will place cash, U.S. Government securities or other
appropriate liquid portfolio securities in a segregated account of the Fund in
an amount equal to the value of the Fund's total assets committed to the
consummation of forward contracts entered into under the circumstances set forth
above. If the value of the securities placed in the segregated account declines,
additional cash or securities will be placed in the account on a daily basis so
that the value of the account will equal the amount of the Fund's commitments
with respect to such contracts.
 
    Where, for example, the Fund is hedging a portfolio position consisting of
foreign securities denominated in a foreign currency against adverse exchange
rate moves vis-a-vis the U.S. dollar, at the maturity of the forward contract
for delivery by the Fund of a foreign currency, the Fund may either sell the
portfolio security and make delivery of the foreign currency, or it may retain
the security and terminate its contractual obligation to deliver the foreign
currency by purchasing an "offsetting" contract with the same currency trader
obligating it to purchase, on the same maturity date, the same amount of the
foreign currency (however, the ability of the Fund to terminate a contract is
contingent upon the willingness of the currency trader with whom the contract
has been entered into to permit an offsetting transaction). It is impossible to
forecast the market value of portfolio securities at the expiration of the
contract. Accordingly, it may be necessary for the Fund to purchase additional
foreign currency on the spot market (and bear the expense of such purchase) if
the market value of the security is less than the amount of foreign currency the
Fund is obligated to deliver and if a decision is made to sell the security and
make delivery of the foreign currency. Conversely, it may be necessary to sell
on the spot market some of the foreign currency received upon the sale of the
portfolio securities if its market value exceeds the amount of foreign currency
the Fund is obligated to deliver.
 
    If the Fund retains the portfolio securities and engages in an offsetting
transaction, the Fund will incur a gain or loss to the extent that there has
been movement in spot or forward contract prices. If the Fund engages in an
offsetting transaction, it may subsequently enter into a new forward contract to
sell the foreign currency. Should forward prices decline during the period
between the Fund's entering into a forward contract for the sale of a foreign
currency and the date it enters into an offsetting contract for the purchase of
the foreign currency, the Fund will realize a gain to the extent the price of
the currency it has agreed to sell exceeds the price of the currency it has
agreed to purchase. Should forward prices increase, the Fund will suffer a loss
to the extent the price of the currency it has agreed to purchase exceeds the
price of the currency it has agreed to sell.
 
                                       15
<PAGE>
    If the Fund purchases a fixed-income security which is denominated in U.S.
dollars but which will pay out its principal based upon a formula tied to the
exchange rate between the U.S. dollar and a foreign currency, it may hedge
against a decline in the principal value of the security by entering into a
forward contract to sell an amount of the relevant foreign currency equal to
some or all of the principal value of the security.
 
    At times when the Fund has written a call option on a security or the
currency in which it is denominated, it may wish to enter into a forward
contract to purchase or sell the foreign currency in which the security is
denominated. A forward contract would, for example, hedge the risk of the
security on which a call option has been written declining in value to a greater
extent than the value of the premium received for the option. The Fund will
maintain with its Custodian at all times, cash, U.S. Government securities, or
other appropriate liquid portfolio securities in a segregated account equal in
value to all forward contract obligations and option contract obligations
entered into in hedge situations such as this.
 
    Although the Fund values its assets daily in terms of U.S. dollars, it does
not intend to convert its holdings of foreign currencies into U.S. dollars on a
daily basis. It will, however, do so from time to time, and investors should be
aware of the costs of currency conversion. Although foreign exchange dealers do
not charge a fee for conversion, they do realize a profit based on the spread
between the prices at which they are buying and selling various currencies. Thus
a dealer may offer to sell a foreign currency to the Fund at one rate, while
offering a lesser rate of exchange should the Fund desire to resell that
currency to the dealer.
 
    REPURCHASE AGREEMENTS.  When cash may be available for only a few days, it
may be invested by the Fund in repurchase agreements until such time as it may
otherwise be invested or used for payments of obligations of the Fund. These
agreements, which may be viewed as a type of secured lending by the Fund,
typically involve the acquisition by the Fund of debt securities from a selling
financial institution such as a bank, savings and loan association or
broker-dealer. The agreement provides that the Fund will sell back to the
institution, and that the institution will repurchase, the underlying security
("collateral") at a specified price and at a fixed time in the future, usually
not more than seven days from the date of purchase. The collateral will be
maintained in a segregated account and will be marked-to-market daily to
determine that the value of the collateral, as specified in the agreement, does
not decrease below the purchase price plus accrued interest. If such decrease
occurs, additional collateral will be requested and, when received, added to the
account to maintain full collateralization. The Fund will accrue interest from
the institution until the time when the repurchase is to occur. Although such
date is deemed by the Fund to be the maturity date of a repurchase agreement,
the maturities of securities subject to repurchase agreements are not subject to
any limits.
 
    While repurchase agreements involve certain risks not associated with direct
investments in debt securities, the Fund follows procedures designed to minimize
such risks. These procedures include effecting repurchase transactions only with
large, well-capitalized and well-established financial institutions whose
financial condition will be continually monitored by the Investment Manager
subject to procedures established by the Board of Trustees of the Fund. In
addition, as described above, the value of the collateral underlying the
repurchase agreement will be at least equal to the repurchase price, including
any accrued interest earned on the repurchase agreement. In the event of a
default or bankruptcy by a selling financial institution, the Fund will seek to
liquidate such collateral. However, the exercising of the Fund's right to
liquidate such collateral could involve certain costs or delays and, to the
extent that proceeds from any sale upon a default of the obligation to
repurchase were less than the repurchase price, the Fund could suffer a loss. It
is the current policy of the Fund not to invest in repurchase agreements that do
not mature within seven days if any such investment, together with any other
illiquid assets held by the Fund, amounts to more than 15% of its net assets.
The Fund's investments in repurchase agreements may at times be substantial
when, in the view of the Investment Manager and/or the Sub-Advisor, liquidity,
tax or other considerations warrant.
 
                                       16
<PAGE>
    REVERSE REPURCHASE AGREEMENTS AND DOLLAR ROLLS.  The Fund may also use
reverse repurchase agreements and dollar rolls as part of its investment
strategy. Reverse repurchase agreements involve sales by the Fund of portfolio
assets concurrently with an agreement by the Fund to repurchase the same assets
at a later date at a fixed price. Generally, the effect of such a transaction is
that the Fund can recover all or most of the cash invested in the portfolio
securities involved during the term of the reverse repurchase agreement, while
it will be able to keep the interest income associated with those portfolio
securities. Such transactions are only advantageous if the interest cost to the
Fund of the reverse repurchase transaction is less than the cost of obtaining
the cash otherwise.
 
    The Fund may enter into dollar rolls in which the Fund sells securities for
delivery in the current months and simultaneously contracts to repurchase
substantially similar (same type and coupon) securities on a specified future
date. During the roll period, the Fund forgoes principal and interest paid on
the securities. The Fund is compensated by the difference between the current
sales price and the lower forward price for the future purchase (often referred
to as the "drop") as well as by the interest earned on the cash proceeds of the
initial sale.
 
    The Fund will establish a segregated account with its custodian bank in
which it will maintain cash, U.S. Government Securities or other liquid high
grade debt obligations equal in value to its obligations in respect of reverse
repurchase agreements and dollar rolls. Reverse repurchase agreements and dollar
rolls involve the risk that the market value of the securities the Fund is
obligated to repurchase under the agreement may decline below the repurchase
price. In the event the buyer of securities under a reverse repurchase agreement
or dollar roll files for bankruptcy or becomes insolvent, the Fund's use of
proceeds of the agreement may be restricted pending a determination by the other
party, or its trustee or receiver, whether to enforce the Fund's obligation to
repurchase the securities. Reverse repurchase agreements and dollar rolls are
speculative techniques involving leverage, and are considered borrowings by the
Fund.
 
    LENDING OF PORTFOLIO SECURITIES.  Consistent with applicable regulatory
requirements, the Fund may lend its portfolio securities to brokers, dealers and
other financial institutions, provided that such loans are callable at any time
by the Fund (subject to notice provisions described below), and are at all times
secured by cash or cash equivalents, which are maintained in a segregated
account pursuant to applicable regulations and that are equal to at least the
market value, determined daily, of the loaned securities. The advantage of such
loans is that the Fund continues to receive the income on the loaned securities
while at the same time earning interest on the cash amounts deposited as
collateral, which will be invested in short-term obligations. The Fund will not
lend its portfolio securities if such loans are not permitted by the laws or
regulations of any state in which its shares are qualified for sale and will not
lend more than 25% of the value of its total assets. A loan may be terminated by
the borrower on one business day's notice, or by the Fund on four business days'
notice. If the borrower fails to deliver the loaned securities within four days
after receipt of notice, the Fund could use the collateral to replace the
securities while holding the borrower liable for any excess of replacement cost
over collateral. As with any extensions of credit, there are risks of delay in
recovery and in some cases even loss of rights in the collateral should the
borrower of the securities fail financially. However, these loans of portfolio
securities will only be made to firms deemed by the Fund's management to be
creditworthy and when the income which can be earned from such loans justifies
the attendant risks. Upon termination of the loan, the borrower is required to
return the securities to the Fund. Any gain or loss in the market price during
the loan period would inure to the Fund. The creditworthiness of firms to which
the Fund lends its portfolio securities will be monitored on an ongoing basis by
the Investment Manager pursuant to procedures adopted and reviewed, on an
ongoing basis, by the Board of Trustees of the Fund.
 
    When voting or consent rights which accompany loaned securities pass to the
borrower, the Fund will follow the policy of calling the loaned securities, to
be delivered within one day after notice, to permit the exercise of such rights
if the matters involved would have a material effect on the Fund's investment in
such loaned securities. The Fund will pay reasonable finder's, administrative
and custodial fees in connection with a loan of its securities. However, the
Fund has no intention of lending any of its portfolio securities during its
fiscal year ending May 31, 1998.
 
                                       17
<PAGE>
    WHEN-ISSUED AND DELAYED DELIVERY SECURITIES AND FORWARD COMMITMENTS.  From
time to time the Fund may purchase securities on a when-issued or delayed
delivery basis or may purchase or sell securities on a forward commitment basis.
When such transactions are negotiated, the price is fixed at the time of the
commitment, but delivery and payment can take place a month or more after the
date of commitment. While the Fund will only purchase securities on a
when-issued, delayed delivery or forward commitment basis with the intention of
acquiring the securities, the Fund may sell the securities before the settlement
date, if it is deemed advisable. The securities so purchased or sold are subject
to market fluctuation and no interest or dividends accrue to the purchaser prior
to the settlement date. At the time the Fund makes the commitment to purchase or
sell securities on a when-issued, delayed delivery or forward commitment basis,
it will record the transaction and thereafter reflect the value, each day, of
such security purchased, or if a sale, the proceeds to be received, in
determining its net asset value. At the time of delivery of the securities, the
value may be more or less than the purchase or sale price. The Fund will also
establish a segregated account with its custodian bank in which it will
continually maintain cash or cash equivalents or other liquid portfolio
securities equal in value to commitments to purchase securities on a
when-issued, delayed delivery or forward commitment basis. Subject to the
foregoing restrictions, the Fund may purchase securities on such basis without
limit.
 
    WHEN, AS AND IF ISSUED SECURITIES.  The Fund may purchase securities on a
"when, as and if issued" basis under which the issuance of the security depends
upon the occurrence of a subsequent event, such as approval of a merger,
corporate reorganization, leveraged buyout or debt restructuring. The commitment
for the purchase of any such security will not be recognized in the portfolio of
the Fund until the Investment Manager and/or the Sub-Advisor determines that
issuance of the security is probable. At such time, the Fund will record the
transaction and, in determining its net asset value, will reflect the value of
the security daily. At such time, the Fund will also establish a segregated
account with its custodian bank in which it will maintain cash or cash
equivalents or other liquid portfolio securities equal in value to recognized
commitments for such securities. Once a segregated account has been established,
if the anticipated event does not occur and the securities are not issued, the
Fund will have lost an investment opportunity. The value of the Fund's
commitments to purchase the securities of any one issuer, together with the
value of all securities of such issuer owned by the Fund, may not exceed 5% of
the value of the Fund's total assets at the time the initial commitment to
purchase such securities is made (see "Investment Restrictions"). Subject to the
foregoing restrictions, the Fund may purchase securities on such basis without
limit. An increase in the percentage of the Fund's assets committed to the
purchase of securities on a "when, as and if issued" basis may increase the
volatility of its net asset value. The Fund may also sell securities on a "when,
as and if issued" basis provided that the issuance of the security will result
automatically from the exchange or conversion of a security owned by the Fund at
the time of the sale.
 
    PRIVATE PLACEMENTS.  The Fund may invest up to 5% of its total assets in
securities which are subject to restrictions on resale because they have not
been registered under the Securities Act of 1933, as amended (the "Securities
Act"), or which are otherwise not readily marketable. (Securities eligible for
resale pursuant to Rule 144A of the Securities Act, and determined to be liquid
pursuant to the procedures discussed in the following paragraph, are not subject
to the foregoing restriction.) Limitations on the resale of such securities may
have an adverse effect on their marketability, and may prevent the Fund from
disposing of them promptly at reasonable prices. The Fund may have to bear the
expense of registering such securities for resale and the risk of substantial
delays in effecting such registration.
 
    The Securities and Exchange Commission ("SEC") has adopted Rule 144A under
the Securities Act, which permits the Fund to sell restricted securities to
qualified institutional buyers without limitation. The Investment Manager,
pursuant to procedures adopted by the Trustees of the Fund, will make a
determination as to the liquidity of each restricted security purchased by the
Fund. The procedures require that the following factors be taken into account in
making a liquidity determination: (1) the frequency of trades and price quotes
for the security; (2) the number of dealers and other potential purchasers who
have issued quotes on the security; (3) any dealer undertakings to make a market
in the security; and (4) the nature of the security and the nature of the
marketplace trades (the time needed to
 
                                       18
<PAGE>
dispose of the security, the method of soliciting offers, and the mechanics of
transfer). If a restricted security is determined to be "liquid," such security
will not be included within the category "illiquid securities," which under the
SEC's current policies may not exceed 15% of the Fund's net assets, and will not
be subject to the 5% limitation set out in the preceding paragraph.
 
    The Rule 144A marketplace of sellers and qualified institutional buyers is
new and still developing and may take a period of time to develop into a mature
liquid market. As such, the market for certain private placements purchased
pursuant to Rule 144A may be initially small or may, subsequent to purchase,
become illiquid. Furthermore, the Investment Manager may not posses all the
information concerning an issue of securities that it wishes to purchase in a
private placement to which it would normally have had access, had the
registration statement necessitated by a public offering been filed with the
Securities and Exchange Commission.
 
OPTIONS AND FUTURES TRANSACTIONS
 
    The Fund may write covered call options against securities held in its
portfolio and covered put options on eligible portfolio securities and stock
indexes and purchase options of the same series to effect closing transactions,
and may hedge against potential changes in the market value of investments (or
anticipated investments) and facilitate the reallocation of the Fund's assets
into and out of equities and fixed-income securities by purchasing put and call
options on portfolio (or eligible portfolio) securities and engaging in
transactions involving futures contracts and options on such contracts. The Fund
may also hedge against potential changes in the market value of the currencies
in which its investments (or anticipated investments) are denominated by
purchasing put and call options on currencies and engage in transactions
involving currency futures contracts and options on such contracts.
 
    Call and put options on U.S. Treasury notes, bonds and bills and equity
securities are listed on Exchanges and are written in over-the-counter
transactions ("OTC options"). Listed options are issued by the Options Clearing
Corporation ("OCC") and other clearing entities including foreign exchanges.
Ownership of a listed call option gives the Fund the right to buy from the OCC
the underlying security covered by the option at the stated exercise price (the
price per unit of the underlying security) by filing an exercise notice prior to
the expiration date of the option. The writer (seller) of the option would then
have the obligation to sell to the OCC the underlying security at that exercise
price prior to the expiration date of the option, regardless of its then current
market price. Ownership of a listed put option would give the Fund the right to
sell the underlying security to the OCC at the stated exercise price. Upon
notice of exercise of the put option, the writer of the put would have the
obligation to purchase the underlying security from the OCC at the exercise
price.
 
    OPTIONS ON TREASURY BONDS AND NOTES.  Because trading in options written on
Treasury bonds and notes tends to center on the most recently auctioned issues,
the exchanges on which such securities trade will not continue indefinitely to
introduce options with new expirations to replace expiring options on particular
issues. Instead, the expirations introduced at the commencement of options
trading on a particular issue will be allowed to run their course, with the
possible addition of a limited number of new expirations as the original ones
expire. Options trading on each issue of bonds or notes will thus be phased out
as new options are listed on more recent issues, and options representing a full
range of expirations will not ordinarily be available for every issue on which
options are traded.
 
    OPTIONS ON TREASURY BILLS.  Because a deliverable Treasury bill changes from
week to week, writers of Treasury bill calls cannot provide in advance for their
potential exercise settlement obligations by acquiring and holding the
underlying security. However, if the Fund holds a long position in Treasury
bills with a principal amount of the securities deliverable upon exercise of the
option, the position may be hedged from a risk standpoint by the writing of a
call option. For so long as the call option is outstanding, the Fund will hold
the Treasury bills in a segregated account with its Custodian, so that they will
be treated as being covered.
 
                                       19
<PAGE>
    OPTIONS ON FOREIGN CURRENCIES.  The Fund may purchase and write options on
foreign currencies for purposes similar to those involved with investing in
forward foreign currency exchange contracts. For example, in order to protect
against declines in the dollar value of portfolio securities which are
denominated in a foreign currency, the Fund may purchase put options on an
amount of such foreign currency equivalent to the current value of the portfolio
securities involved. As a result, the Fund would be enabled to sell the foreign
currency for a fixed amount of U.S. dollars, thereby "locking in" the dollar
value of the portfolio securities (less the amount of the premiums paid for the
options). Conversely, the Fund may purchase call options on foreign currencies
in which securities it anticipates purchasing are denominated to secure a set
U.S. dollar price for such securities and protect against a decline in the value
of the U.S. dollar against such foreign currency. The Fund may also purchase
call and put options to close out written option positions.
 
    The Fund may also write call options on foreign currency to protect against
potential declines in its portfolio securities which are denominated in foreign
currencies. If the U.S. dollar value of the portfolio securities falls as a
result of a decline in the exchange rate between the foreign currency in which a
security is denominated and the U.S. dollar, then a loss to the Fund occasioned
by such value decline would be ameliorated by receipt of the premium on the
option sold. At the same time, however, the Fund gives up the benefit of any
rise in value of the relevant portfolio securities above the exercise price of
the option and, in fact, only receives a benefit from the writing of the option
to the extent that the value of the portfolio securities falls below the price
of the premium received. The Fund may also write options to close out long call
option positions.
 
    The markets in foreign currency options are relatively new and the Fund's
ability to establish and close out positions on such options is subject to the
maintenance of a liquid secondary market. Although the Fund will not purchase or
write such options unless and until, in the opinion of the management of the
Fund, the market for them has developed sufficiently to ensure that the risks in
connection with such options are not greater than the risks in connection with
the underlying currency, there can be no assurance that a liquid secondary
market will exist for a particular option at any specific time. In addition,
options on foreign currencies are affected by all of those factors which
influence foreign exchange rates and investments generally.
 
    The value of a foreign currency option depends upon the value of the
underlying currency relative to the U.S. dollar. As a result, the price of the
option position may vary with changes in the value of either or both currencies
and have no relationship to the investment merits of a foreign security,
including foreign securities held in a "hedged" investment portfolio. Because
foreign currency transactions occurring in the interbank market involve
substantially larger amounts than those that may be involved in the use of
foreign currency options, investors may be disadvantaged by having to deal in an
odd lot market (generally consisting of transactions of less than $1 million)
for the underlying foreign currencies at prices that are less favorable than for
round lots.
 
    There is no systematic reporting of last sale information for foreign
currencies or any regulatory requirement that quotations available through
dealers or other market sources be firm or revised on a timely basis. Quotation
information available is generally representative of very large transactions in
the interbank market and thus may not reflect relatively smaller transactions
(i.e., less than $1 million) where rates may be less favorable. The interbank
market in foreign currencies is a global, around-the-clock market. To the extent
that the U.S. options markets are closed while the markets for the underlying
currencies remain open, significant price and rate movements may take place in
the underlying markets that are not reflected in the options market.
 
    OTC OPTIONS.  Exchange-listed options are issued by the OCC which assures
that all transactions in such options are properly executed. OTC options are
purchased from or sold (written) to dealers or financial institutions which have
entered into direct agreements with the Fund. With OTC options, such variables
as expiration date, exercise price and premium will be agreed upon between the
Fund and the transacting dealer, without the intermediation of a third party
such as the OCC. If the transacting dealer fails to make or take delivery of the
securities underlying an option it has written, in accordance with the
 
                                       20
<PAGE>
terms of that option, the Fund would lose the premium paid for the option as
well as any anticipated benefit of the transaction.
 
    COVERED CALL WRITING.  The Fund is permitted to write covered call options
on portfolio securities and the U.S. dollar and foreign currencies, without
limit, in order to aid in achieving its investment objective. Generally, a call
option is "covered" if the Fund owns, or has the right to acquire, without
additional cash consideration (or for additional cash consideration held for the
Fund by its Custodian in a segregated account) the underlying security
(currency) subject to the option except that in the case of call options on U.S.
Treasury Bills, the Fund might own U.S. Treasury Bills of a different series
from those underlying the call option, but with a principal amount and value
corresponding to the exercise price and a maturity date no later than that of
the securities (currency) deliverable under the call option. A call option is
also covered if the Fund holds a call on the same security (currency) as the
underlying security (currency) of the written option, where the exercise price
of the call used for coverage is equal to or less than the exercise price of the
call written or greater than the exercise price of the call written if the mark
to market difference is maintained by the Fund in cash, U.S. Government
securities or other liquid portfolio securities which the Fund holds in a
segregated account maintained with its Custodian.
 
    The Fund will receive from the purchaser, in return for a call it has
written, a "premium"; i.e., the price of the option. Receipt of these premiums
may better enable the Fund to achieve a greater total return than would be
realized from holding the underlying securities (currency) alone. Moreover, the
income received from the premium will offset a portion of the potential loss
incurred by the Fund if the securities (currency) underlying the option are
ultimately sold (exchanged) by the Fund at a loss. The premium received will
fluctuate with varying economic market conditions. If the market value of the
portfolio securities (or the currencies in which they are denominated) upon
which call options have been written increases, the Fund may receive less total
return from the portion of its portfolio upon which calls have been written than
it would have had such calls not been written.
 
    As regards listed options and certain OTC options, during the option period,
the Fund may be required, at any time, to deliver the underlying security
(currency) against payment of the exercise price on any calls it has written
(exercise of certain listed and OTC options may be limited to specific
expiration dates). This obligation is terminated upon the expiration of the
option period or at such earlier time when the writer effects a closing purchase
transaction. A closing purchase transaction is accomplished by purchasing an
option of the same series as the option previously written. However, once the
Fund has been assigned an exercise notice, the Fund will be unable to effect a
closing purchase transaction.
 
    Closing purchase transactions are ordinarily effected to realize a profit on
an outstanding call option to prevent an underlying security (currency) from
being called, to permit the sale of an underlying security (or the exchange of
the underlying currency) or to enable the Fund to write another call option on
the underlying security (currency) with either a different exercise price or
expiration date or both. Also, effecting a closing purchase transaction will
permit the cash or proceeds from the concurrent sale of any securities subject
to the option to be used for other investments by the Fund. The Fund may realize
a net gain or loss from a closing purchase transaction depending upon whether
the amount of the premium received on the call option is more or less than the
cost of effecting the closing purchase transaction. Any loss incurred in a
closing purchase transaction may be wholly or partially offset by unrealized
appreciation in the market value of the underlying security (currency).
Conversely, a gain resulting from a closing purchase transaction could be offset
in whole or in part or exceeded by a decline in the market value of the
underlying security (currency).
 
    If a call option expires unexercised, the Fund realizes a gain in the amount
of the premium on the option less the commission paid. Such a gain, however, may
be offset by depreciation in the market value of the underlying security
(currency) during the option period. If a call option is exercised, the Fund
realizes a gain or loss from the sale of the underlying security (currency)
equal to the difference between the purchase price of the underlying security
(currency) and the proceeds of the sale of the security (currency) plus the
premium received for the option less the commission paid.
 
                                       21
<PAGE>
    Options written by a Fund normally have expiration dates of from up to nine
months (equity securities) to eighteen months (fixed-income securities) from the
date written. The exercise price of a call option may be below, equal to or
above the current market value of the underlying security (currency) at the time
the option is written. See "Risks of Options Transactions," below.
 
    COVERED PUT WRITING.  As a writer of a covered put option, the Fund incurs
an obligation to buy the security underlying the option from the purchaser of
the put, at the option's exercise price at any time during the option period, at
the purchaser's election (certain listed and OTC put options written by the Fund
will be exercisable by the purchaser only on a specific date). A put is
"covered" if, at all times, the Fund maintains, in a segregated account
maintained on its behalf at the Fund's Custodian, cash, U.S. Government
securities or other liquid portfolio securities in an amount equal to at least
the exercise price of the option, at all times during the option period.
Similarly, a short put position could be covered by the Fund by its purchase of
a put option on the same security as the underlying security of the written
option, where the exercise price of the purchased option is equal to or more
than the exercise price of the put written or less than the exercise price of
the put written if the mark to market difference is maintained by the Fund in
cash, U.S. Government securities or other liquid portfolio securities which the
Fund holds in a segregated account maintained at its Custodian. In writing puts,
the Fund assumes the risk of loss should the market value of the underlying
security decline below the exercise price of the option (any loss being
decreased by the receipt of the premium on the option written). In the case of
listed options, during the option period, the Fund may be required, at any time,
to make payment of the exercise price against delivery of the underlying
security. The operation of and limitations on covered put options in other
respects are substantially identical to those of call options.
 
    The Fund will write put options for two purposes: (1) to receive the income
derived from the premiums paid by purchasers; and (2) when the Investment
Manager wishes to purchase the security underlying the option at a price lower
than its current market price, in which case it will write the covered put at an
exercise price reflecting the lower purchase price sought. The potential gain on
a covered put option is limited to the premium received on the option (less the
commissions paid on the transaction) while the potential loss equals the
difference between the exercise price of the option and the current market price
of the underlying securities when the put is exercised, offset by the premium
received (less the commissions paid on the transaction).
 
    The Fund may also purchase put options to close out written put positions in
a manner similar to call options closing purchase transactions. In addition, the
Fund may sell a put option which it has previously purchased prior to the sale
of the securities (currency) underlying such option. Such a sale would result in
a net gain or loss depending on whether the amount received on the sale is more
or less than the premium and other transaction costs paid on the put option
sold. Any such gain or loss could be offset in whole or in part by a change in
the market value of the underlying security (currency). If a put option
purchased by the Fund expired without being sold or exercised the premium would
be lost.
 
    PURCHASING CALL AND PUT OPTIONS.  As stated in the Prospectus, the Fund may
purchase listed and OTC call and put options in amounts equalling up to 5% of
its total assets. The Fund may purchase call options in order to close out a
covered call position (see "Covered Call Writing" above) to protect against an
increase in price of a security it anticipates purchasing or, in the case of a
call option on foreign currency to hedge against an adverse exchange rate move
of the currency in which the security it anticipates purchasing is denominated
vis-a-vis the currency in which the exercise price is denominated. The purchase
of the call option to effect a closing transaction on a call written
over-the-counter may be a listed or an OTC option. In either case, the call
purchased is likely to be on the same securities (currencies) and have the same
terms as the written option. If purchased over-the-counter, the option would
generally be acquired from the dealer or financial institution which purchased
the call written by the Fund.
 
    The Fund may purchase put options on securities and currencies (or related
currencies) which it holds in its portfolio only to protect itself against a
decline in the value of the security (currency). If the value of the underlying
security (currency) were to fall below the exercise price of the put purchased
in
 
                                       22
<PAGE>
an amount greater than the premium paid for the option, the Fund would incur no
additional loss. The Fund may also purchase put options to close out written put
positions in a manner similar to call options closing purchase transactions. In
addition, the Fund may sell a put option which it has previously purchased prior
to the sale of the securities (currencies) underlying such option. Such a sale
would result in a net gain or loss depending on whether the amount received on
the sale is more or less than the premium and other transaction costs paid on
the put option which is sold. Any such gain or loss could be offset in whole or
in part by a change in the market value of the underlying security (currency).
If a put option purchased by the Fund expired without being sold or exercised,
the premium would be lost.
 
    RISKS OF OPTIONS TRANSACTIONS.  The successful use of options depends on the
ability of the Investment Manager and/or the Sub-Advisor to forecast correctly
interest rates and market movements. If the market value of the portfolio
securities (or the currencies in which they are denominated) upon which call
options have been written increases, the Fund may receive a lower total return
from the portion of its portfolio upon which calls have been written than it
would have had such calls not been written. During the option period, the
covered call writer has, in return for the premium on the option, given up the
opportunity for capital appreciation above the exercise price should the market
price of the underlying security (or the currency in which it is denominated)
increase, but has retained the risk of loss should the price of the underlying
security (currency) decline. The covered put writer also retains the risk of
loss should the market value of the underlying security (currency) decline below
the exercise price of the option less the premium received on the sale of the
option. In both cases, the writer has no control over the time when it may be
required to fulfill its obligation as a writer of the option. Once an option
writer has received an exercise notice, it cannot effect a closing purchase
transaction in order to terminate its obligation under the option and must
deliver or receive the underlying securities (currency) at the exercise price.
 
    Prior to exercise or expiration, an option position can only be terminated
by entering into a closing purchase or sale transaction. If a covered call
option writer is unable to effect a closing purchase transaction or to purchase
an offsetting over-the-counter option, it cannot sell the underlying security
until the option expires or the option is exercised. Accordingly, a covered call
option writer may not be able to sell (exchange) an underlying security
(currency) at a time when it might otherwise be advantageous to do so. A covered
put option writer who is unable to effect a closing purchase transaction or to
purchase an offsetting over-the-counter option would continue to bear the risk
of decline in the market price of the underlying security (currency) until the
option expires or is exercised. In addition, a covered put writer would be
unable to utilize the amount held in cash or U.S. Government or other liquid
portfolio securities as security for the put option for other investment
purposes until the exercise or expiration of the option.
 
    The Fund's ability to close out its position as a writer of an option is
dependent upon the existence of a liquid secondary market on option Exchanges.
There is no assurance that such a market will exist, particularly in the case of
OTC options, as such options will generally only be closed out by entering into
a closing purchase transaction with the purchasing dealer. However, the Fund may
be able to purchase an offsetting option which does not close out its position
as a writer but constitutes an asset of equal value to the obligation under the
option written. If the Fund is not able to either enter into a closing purchase
transaction or purchase an offsetting position, it will be required to maintain
the securities subject to the call, or the collateral underlying the put, even
though it might not be advantageous to do so, until a closing transaction can be
entered into (or the option is exercised or expires).
 
    Among the possible reasons for the absence of a liquid secondary market on
an Exchange are: (i) insufficient trading interest in certain options; (ii)
restrictions on transactions imposed by an Exchange; (iii) trading halts,
suspensions or other restrictions imposed with respect to particular classes or
series of options or underlying securities; (iv) interruption of the normal
operations on an Exchange; (v) inadequacy of the facilities of an Exchange or
the Options Clearing Corporation ("OCC") to handle current trading volume; or
(vi) a decision by one or more Exchanges to discontinue the trading of options
(or a particular class or series of options), in which event the secondary
market on that Exchange (or in that class or series of options) would cease to
exist, although outstanding options on that Exchange that
 
                                       23
<PAGE>
had been issued by the OCC as a result of trades on that Exchange would
generally continue to be exercisable in accordance with their terms.
 
    Exchanges limit the amount by which the price of a futures contract may move
on any day. If the price moves equal the daily limit on successive days, then it
may prove impossible to liquidate a futures position until the daily limit moves
have ceased. In the event of adverse price movements, the Fund would continue to
be required to make daily cash payments of variation margin on open futures
positions. In such situations, if the Fund has insufficient cash, it may have to
sell portfolio securities to meet daily variation margin requirements at a time
when it may be disadvantageous to do so. In addition, the Fund may be required
to take or make delivery of the instruments underlying interest rate futures
contracts it holds at a time when it is disadvantageous to do so. The inability
to close out options and futures positions could also have an adverse impact on
the Fund's ability to effectively hedge its portfolio.
 
    In the event of the bankruptcy of a broker through which the Fund engages in
transactions in options, futures or options thereon, the Fund could experience
delays and/or losses in liquidating open positions purchased or sold through the
broker and/or incur a loss of all or part of its margin deposits with the
broker. Similarly, in the event of the bankruptcy of the writer of an OTC option
purchased by the Fund, the Fund could experience a loss of all or part of the
value of the option. Transactions are entered into by the Fund only with brokers
or financial institutions deemed creditworthy by the Investment Manager.
 
    Each of the Exchanges has established limitations governing the maximum
number of call or put options on the same underlying security or futures
contract (whether or not covered) which may be written by a single investor,
whether acting alone or in concert with others (regardless of whether such
options are written on the same or different Exchanges or are held or written on
one or more accounts or through one or more brokers). An Exchange may order the
liquidation of positions found to be in violation of these limits and it may
impose other sanctions or restrictions. These position limits may restrict the
number of listed options which the Fund may write.
 
    While the futures contracts and options transactions to be engaged in by the
Fund for the purpose of hedging the Fund's portfolio securities are not
speculative in nature, there are risks inherent in the use of such instruments.
One such risk which may arise in employing futures contracts to protect against
the price volatility of portfolio securities is that the prices of securities
and indexes subject to futures contracts (and thereby the futures contract
prices) may correlate imperfectly with the behavior of the cash prices of the
Fund's portfolio securities. Another such risk is that prices of interest rate
futures contracts may not move in tandem with the changes in prevailing interest
rates against which the Fund seeks a hedge. A correlation may also be distorted
by the fact that the futures market is dominated by short-term traders seeking
to profit from the difference between a contract or security price objective and
their cost of borrowed funds. Such distortions are generally minor and would
diminish as the contract approached maturity.
 
    The hours of trading for options may not conform to the hours during which
the underlying securities are traded. To the extent that the option markets
close before the markets for the underlying securities, significant price and
rate movements can take place in the underlying markets that cannot be reflected
in the option markets.
 
    STOCK INDEX OPTIONS.  Options on stock indexes are similar to options on
stock except that, rather than the right to take or make delivery of stock at a
specified price, an option on a stock index gives the holder the right to
receive, upon exercise of the option, an amount of cash if the closing level of
the stock index upon which the option is based is greater than, in the case of a
call, or less than, in the case of a put, the exercise price of the option. This
amount of cash is equal to such difference between the closing price of the
index and the exercise price of the option expressed in dollars times a
specified multiple (the "multiplier"). The multiplier for an index option
performs a function similar to the unit of trading for a stock option. It
determines the total dollar value per contract of each point in the difference
between the exercise price of an option and the current level of the underlying
index. A multiplier of 100 means that a
 
                                       24
<PAGE>
one-point difference will yield $100. Options on different indexes may have
different multipliers. The writer of the option is obligated, in return for the
premium received, to make delivery of this amount. Unlike stock options, all
settlements are in cash and a gain or loss depends on price movements in the
stock market generally (or in a particular segment of the market) rather than
the price movements in individual stocks. Currently, options are traded on the
S&P 100 Index and the S&P 500 Index on the Chicago Board Options Exchange, the
Major Market Index and the Computer Technology Index, Oil Index and
Institutional Index on the American Stock Exchange and the NYSE Index and NYSE
Beta Index on the New York Stock Exchange, The Financial News Composite Index on
the Pacific Stock Exchange and the Value Line Index, National O-T-C Index and
Utilities Index on the Philadelphia Stock Exchange, each of which and any
similar index on which options are traded in the future which include stocks
that are not limited to any particular industry or segment of the market is
referred to as a "broadly based stock market index." Options on stock indexes
provide the Fund with a means of protecting the Fund against the risk of market
wide price movements. If the Investment Manager and/or Sub-Advisor anticipate a
market decline, the Fund could purchase a stock index put option. If the
expected market decline materialized, the resulting decrease in the value of the
Fund's portfolio would be offset to the extent of the increase in the value of
the put option. If the Investment Manager and/or Sub-Advisor anticipate a market
rise, the Fund may purchase a stock index call option to enable the Fund to
participate in such rise until completion of anticipated common stock purchases
by the Fund. Purchases and sales of stock index options also enable the
Investment Manager to more speedily achieve changes in the Fund's equity
positions.
 
    The Fund will write put options on stock indexes only if such positions are
covered by cash, U.S. Government securities or other liquid portfolio securities
equal to the aggregate exercise price of the puts, which cover is held for the
Fund in a segregated account maintained for it by the Fund's Custodian. All call
options on stock indexes written by the Fund will be covered either by a
portfolio of stocks substantially replicating the movement of the index
underlying the call option or by holding a separate call option on the same
stock index with a strike price no higher than the strike price of the call
option sold by the Fund.
 
    RISKS OF OPTIONS ON INDEXES.  Because exercises of stock index options are
settled in cash, call writers such as the Fund cannot provide in advance for
their potential settlement obligations by acquiring and holding the underlying
securities. A call writer can offset some of the risk of its writing position by
holding a diversified portfolio of stocks similar to those on which the
underlying index is based. However, most investors cannot, as a practical
matter, acquire and hold a portfolio containing exactly the same stocks as the
underlying index, and, as a result, bear a risk that the value of the securities
held will vary from the value of the index. Even if an index call writer could
assemble a stock portfolio that exactly reproduced the composition of the
underlying index, the writer still would not be fully covered from a risk
standpoint because of the "timing risk" inherent in writing index options. When
an index option is exercised, the amount of cash that the holder is entitled to
receive is determined by the difference between the exercise price and the
closing index level on the date when the option is exercised. As with other
kinds of options, the writer will not learn that it has been assigned until the
next business day, at the earliest. The time lag between exercise and notice of
assignment poses no risk for the writer of a covered call on a specific
underlying security, such as a common stock, because there the writer's
obligation is to deliver the underlying security, not to pay its value as of a
fixed time in the past. So long as the writer already owns the underlying
security, it can satisfy its settlement obligations by simply delivering it, and
the risk that its value may have declined since the exercise date is borne by
the exercising holder. In contrast, even if the writer of an index call holds
stocks that exactly match the composition of the underlying index, it will not
be able to satisfy its assignment obligations by delivering those stocks against
payment of the exercise price. Instead, it will be required to pay cash in an
amount based on the closing index value on the exercise date; and by the time it
learns that it has been assigned, the index may have declined, with a
corresponding decrease in the value of its stock portfolio. This "timing risk"
is an inherent limitation on the ability of index call writers to cover their
risk exposure by holding stock positions.
 
                                       25
<PAGE>
    A holder of an index option who exercises it before the closing index value
for that day is available runs the risk that the level of the underlying index
may subsequently change. If such a change causes the exercised option to fall
out-of-the-money, the exercising holder will be required to pay the difference
between the closing index value and the exercise price of the option (times the
applicable multiplier) to the assigned writer.
 
    If dissemination of the current level of an underlying index is interrupted,
or if trading is interrupted in stocks accounting for a substantial portion of
the value of an index, the trading of options on that index will ordinarily be
halted. If the trading of options on an underlying index is halted, an exchange
may impose restrictions prohibiting the exercise of such options.
 
    FUTURES CONTRACTS.  The Fund may purchase and sell interest rate and stock
index futures contracts ("futures contracts") that are traded on U.S. and
foreign commodity exchanges on such underlying securities as U.S. Treasury
bonds, notes and bills ("interest rate" futures), on the U.S. dollar and foreign
currencies, and such indexes as the S&P 500 Index, the Moody's Investment-Grade
Corporate Bond Index and the New York Stock Exchange Composite Index ("index"
futures).
 
    As a futures contract purchaser, the Fund incurs an obligation to take
delivery of a specified amount of the obligation underlying the contract at a
specified time in the future for a specified price. As a seller of a futures
contract, the Fund incurs an obligation to deliver the specified amount of the
underlying obligation at a specified time in return for an agreed upon price.
 
    The Fund will purchase or sell interest rate futures contracts and bond
index futures contracts for the purpose of hedging its fixed-income portfolio
(or anticipated portfolio) securities against changes in prevailing interest
rates. If the Investment Manager anticipates that interest rates may rise and,
concomitantly, the price of fixed-income securities fall, the Fund may sell an
interest rate futures contract or a bond index futures contract. If declining
interest rates are anticipated, the Fund may purchase an interest rate futures
contract to protect against a potential increase in the price of U.S. Government
securities the Fund intends to purchase. Subsequently, appropriate fixed-income
securities may be purchased by the Fund in an orderly fashion; as securities are
purchased, corresponding futures positions would be terminated by offsetting
sales of contracts.
 
    The Fund will purchase or sell futures contracts on the U.S. dollar and on
foreign currencies to hedge against an anticipated rise or decline in the value
of the U.S. dollar or foreign currency in which a portfolio security of the Fund
is denominated vis-a-vis another currency.
 
    The Fund will purchase or sell stock index futures contracts for the purpose
of hedging its equity portfolio (or anticipated portfolio) securities against
changes in their prices. If the Investment Manager anticipates that the prices
of stock held by the Fund may fall, the Fund may sell a stock index futures
contract. Conversely, if the Investment Manager wishes to hedge against
anticipated price rises in those stocks which the Fund intends to purchase, the
Fund may purchase stock index futures contracts. In addition, interest rate and
stock index futures contracts will be bought or sold in order to close out a
short or long position in a corresponding futures contract.
 
    Although most interest rate futures contracts call for actual delivery or
acceptance of securities, the contracts usually are closed out before the
settlement date without the making or taking of delivery. Index futures
contracts provide for the delivery of an amount of cash equal to a specified
dollar amount times the difference between the stock index value at the open or
close of the last trading day of the contract and the futures contract price. A
futures contract sale is closed out by effecting a futures contract purchase for
the same aggregate amount of the specific type of equity security and the same
delivery date. If the sale price exceeds the offsetting purchase price, the
seller would be paid the difference and would realize a gain. If the offsetting
purchase price exceeds the sale price, the seller would pay the difference and
would realize a loss. Similarly, a futures contract purchase is closed out by
effecting a futures contract sale for the same aggregate amount of the specific
type of equity security and the same delivery date. If the offsetting sale price
exceeds the purchase price, the purchaser would
 
                                       26
<PAGE>
realize a gain, whereas if the purchase price exceeds the offsetting sale price,
the purchaser would realize a loss. There is no assurance that the Fund will be
able to enter into a closing transaction.
 
    INTEREST RATE FUTURES CONTRACTS.  When the Fund enters into an interest rate
futures contract, it is initially required to deposit with the Fund's Custodian,
in a segregated account in the name of the broker performing the transaction, an
"initial margin" of cash or U.S. Government securities or other liquid portfolio
securities equal to approximately 2% of the contract amount. Initial margin
requirements are established by the Exchanges on which futures contracts trade
and may, from time to time, change. In addition, brokers may establish margin
deposit requirements in excess of those required by the Exchanges.
 
    Initial margin in futures transactions is different from margin in
securities transactions in that initial margin does not involve the borrowing of
funds by a brokers' client but is, rather, a good faith deposit on the futures
contract which will be returned to the Fund upon the proper termination of the
futures contract. The margin deposits made are marked to market daily and the
Fund may be required to make subsequent deposits called "variation margin," with
the Fund's Custodian, in the account in the name of the broker, which are
reflective of price fluctuations in the futures contract. Currently, interest
rates futures contracts can be purchased on debt securities such as U.S.
Treasury Bills and Bonds, U.S. Treasury Notes with maturities between 6 1/2 and
10 years, GNMA Certificates and Bank Certificates of Deposit.
 
    CURRENCY FUTURES.  Generally, foreign currency futures provide for the
delivery of a specified amount of a given currency, on the exercise date, for a
set exercise price denominated in U.S. dollars or other currency. Foreign
currency futures contracts would be entered into for the same reason and under
the same circumstances as forward foreign currency exchange contracts. The
Investment Manager and/ or Sub-Advisor will assess such factors as cost spreads,
liquidity and transaction costs in determining whether to utilize futures
contracts or forward contracts in their foreign currency transactions and
hedging strategy. Currently, currency futures exist for, among other foreign
currencies, the Japanese yen, German mark, Canadian dollar, British pound, Swiss
franc and European currency unit (which is expected to convert into the euro
after December 31, 1998).
 
    Purchasers and sellers of foreign currency futures contracts are subject to
the same risks that apply to the buying and selling of futures generally. In
addition, there are risks associated with foreign currency futures contracts and
their use as a hedging device similar to those associated with options of
foreign currencies described above. Further, settlement of a foreign currency
futures contract must occur within the country issuing the underlying currency.
Thus, the Fund must accept or make delivery of the underlying currency in
accordance with any U.S. or foreign restrictions or regulations regarding the
maintenance of foreign banking arrangements by U.S. residents and may be
required to pay any fees, taxes or charges associated with such delivery which
are assessed in the issuing country.
 
    Options on foreign currency futures contracts may involve certain additional
risks. Trading options on foreign currency futures contracts is relatively new.
The ability to establish and close out positions on such options is subject to
the maintenance of a liquid secondary market. To reduce this risk, the Fund will
not purchase or write options on foreign currency futures contracts unless and
until, in the Investment Manager's and/or the Sub-Advisor's opinion, the market
for such options has developed sufficiently that the risks in connection with
such options are not greater than the risks in connection with transactions in
the underlying foreign currency.
 
    INDEX FUTURES CONTRACTS.  The Fund may invest in index futures contracts. An
index futures contract sale creates an obligation by the Fund, as seller, to
deliver cash at a specified future time. An index futures contract purchase
would create an obligation by the Fund, as purchaser, to take delivery of cash
at a specified future time. Futures contracts on indexes do not require the
physical delivery of securities, but provide for a final cash settlement on the
expiration date which reflects accumulated profits and losses credited or
debited to each party's account.
 
                                       27
<PAGE>
    The Fund is required to maintain margin deposits with brokerage firms
through which it effects index futures contracts. Currently, the initial margin
requirement ranges from 3% to 10% of the contract amount for index futures. In
addition, due to current industry practice, daily variations in gains and losses
on open contracts are required to be reflected in cash in the form of variation
margin payments. The Fund may be required to make additional margin payments
during the term of the contract.
 
    At any time prior to expiration of the futures contract, the Fund may elect
to close the position by taking an opposite position which will operate to
terminate the Fund's position in the futures contract. A final determination of
variation margin is then made, additional cash is required to be paid by or
released to the Fund and the Fund realizes a loss or a gain.
 
    Currently, index futures contracts can be purchased or sold with respect to,
among others, the Standard & Poor's 500 Stock Price Index and the Standard &
Poor's 100 Stock Price Index on the Chicago Mercantile Exchange, the New York
Stock Exchange Composite Index on the New York Futures Exchange, the Major
Market Index on the American Stock Exchange, the Moody's Investment-Grade
Corporate Bond Index on the Chicago Board of Trade and the Value Line Stock
Index on the Kansas City Board of Trade.
 
    OPTIONS ON FUTURES CONTRACTS.  The Fund may purchase and write call and put
options on futures contracts and enter into closing transactions with respect to
such options to terminate an existing position. An option on a futures contract
gives the purchaser the right (in return for the premium paid), and the writer
the obligation, to assume a position in a futures contract (a long position if
the option is a call and a short position if the option is a put) at a specified
exercise price at any time during the term of the option. Upon exercise of the
option, the delivery of the futures position by the writer of the option to the
holder of the option is accompanied by delivery of the accumulated balance in
the writer's futures margin account, which represents the amount by which the
market price of the futures contract at the time of exercise exceeds, in the
case of a call, or is less than, in the case of a put, the exercise price of the
option on the futures contract.
 
    The Fund will purchase and write options on futures contracts for identical
purposes to those set forth above for the purchase of a futures contract
(purchase of a call option or sale of a put option) and the sale of a futures
contract (purchase of a put option or sale of a call option), or to close out a
long or short position in futures contracts. If, for example, the Investment
Manager wished to protect against an increase in interest rates and the
resulting negative impact on the value of a portion of its fixed-income
portfolio, it might write a call option on an interest rate futures contract,
the underlying security of which correlates with the portion of the portfolio
the Investment Manager seeks to hedge. Any premiums received in the writing of
options on futures contracts may, of course, augment the total return of the
Fund and thereby provide a further hedge against losses resulting from price
declines in portions of the Fund's portfolio.
 
    The writer of an option on a futures contract is required to deposit initial
and variation margin pursuant to requirements similar to those applicable to
futures contracts. Premiums received from the writing of an option on a futures
contract are included in initial margin deposits.
 
    LIMITATIONS ON FUTURES CONTRACTS AND OPTIONS ON FUTURES.  The Fund may not
enter into futures contracts or purchase related options thereon if, immediately
thereafter, the amount committed to margin plus the amount paid for premiums for
unexpired options on futures contracts exceeds 5% of the value of the Fund's
total assets, after taking into account unrealized gains and unrealized losses
on such contracts it has entered into, provided, however, that in the case of an
option that is in-the-money (the exercise price of the call (put) option is less
(more) than the market price of the underlying security) at the time of
purchase, the in-the-money amount may be excluded in calculating the 5%.
However, there is no overall limitation on the percentage of the Fund's assets
which may be subject to a hedge position. In addition, in accordance with the
regulations of the Commodity Futures Trading Commission ("CFTC") under which the
Fund is exempted from registration as a commodity pool operator, the Fund may
only enter into futures contracts and options on futures contracts transactions
in accordance with the limitations described above. If the CFTC changes its
regulations so that the Fund would be permitted
 
                                       28
<PAGE>
more latitude to write options on futures contracts for purposes other than
hedging the Fund's investments without CFTC registration, the Fund may engage in
such transactions for those purposes. Except as described above, there are no
other limitations on the use of futures and options thereon by the Fund.
 
    RISKS OF TRANSACTIONS IN FUTURES CONTRACTS AND RELATED OPTIONS.  The
successful use of futures and related options depends on the ability of the
Investment Manager and/or Sub-Advisor to accurately predict market, interest
rate and currency movement. As stated in the Prospectus, the Fund may sell a
futures contract to protect against the decline in the value of securities or
the currency in which they are denominated held by the Fund. However, it is
possible that the futures market may advance and the value of securities (or the
currency in which they are denominated) held in the portfolio of the Fund may
decline. If this occurred, the Fund would lose money on the futures contract and
also experience a decline in value of its portfolio securities. However, while
this could occur for a very brief period or to a very small degree, over time
the value of a diversified portfolio will tend to move in the same direction as
the futures contracts.
 
    If the Fund purchases a futures contract to hedge against the increase in
value of securities it intends to buy (or the currency in which they are
denominated), and the value of such securities decreases, then the Fund may
determine not to invest in the securities as planned and will realize a loss on
the futures contract that is not offset by a reduction in the price of the
securities.
 
    In addition, if the Fund holds a long position in a futures contract or has
sold a put option on a futures contract, it will hold cash, U.S. Government
securities or other liquid portfolio securities equal to the purchase price of
the contract or the exercise price of the put option (less the amount of initial
or variation margin on deposit) in a segregated account maintained for the Fund
by its Custodian. Alternatively, the Fund could cover its long position by
purchasing a put option on the same futures contract with an exercise price as
high or higher than the price of the contract held by the Fund.
 
    If the Fund maintains a short position in a futures contract or has sold a
call option on a futures contract, it will cover this position by holding, in a
segregated account maintained at its Custodian, cash, U.S. Government securities
or other liquid portfolio securities equal in value (when added to any initial
or variation margin on deposit) to the market value of the securities underlying
the futures contract or the exercise price of the option. Such a position may
also be covered by owning the securities underlying the futures contract (in the
case of a stock index futures contract a portfolio of securities substantially
replicating the relevant index), or by holding a call option permitting the Fund
to purchase the same contract at a price no higher than the price at which the
short position was established.
 
    Exchanges may limit the amount by which the price of futures contracts may
move on any day. If the price moves equal the daily limit on successive days,
then it may prove impossible to liquidate a futures position until the daily
limit moves have ceased. In the event of adverse price movements, the Fund would
be required to make daily cash payments of variation margin on open futures
positions. In such situations, if the Fund has insufficient cash, it may have to
sell portfolio securities to meet daily variation margin requirements at a time
when it may be disadvantageous to do so. In addition, the Fund may be required
to take delivery of the instruments underlying interest rate futures contracts
it holds at a time when it is disadvantageous to do so. The inability to close
out options and futures positions could also have an adverse impact on the
Fund's ability to effectively hedge its portfolio.
 
    Futures contracts and options thereon which are purchased or sold on foreign
commodities exchanges may have greater price volatility than their U.S.
counterparts. Furthermore, foreign commodities exchanges may be less regulated
and under less governmental scrutiny than U.S. exchanges. Brokerage commissions,
clearing costs and other transaction costs may be higher on foreign exchanges.
Greater margin requirements may limit the Fund's ability to enter into certain
commodity transactions of foreign exchanges. Moreover, differences in clearance
and delivery requirements on foreign exchanges may occasion delays in the
settlement of the Fund's transactions effected on foreign exchanges.
 
                                       29
<PAGE>
    The extent to which the Fund may enter into transactions involving options
and futures contracts may be limited by the Internal Revenue Code's requirements
for qualification as a regulated investment company and the Fund's intention to
qualify as such. See "Dividends, Distributions and Taxes" in the Prospectus and
the Statement of Additional Information.
 
    While the futures contracts and options transactions to be engaged in by the
Fund for the purpose of hedging the Fund's portfolio securities are not
speculative in nature, there are risks inherent in the use of such instruments.
One such risk which may arise in employing futures contracts to protect against
the price volatility of portfolio securities (and the currencies in which they
are denominated) is that the prices of securities and indexes subject to futures
contracts (and thereby the futures contract prices) may correlate imperfectly
with the behavior of the cash prices of the Fund's portfolio securities (and the
currencies in which they are denominated). Another such risk is that prices of
interest rate futures contracts may not move in tandem with the changes in
prevailing interest rates against which the Fund seeks a hedge. A correlation
may also be distorted (a) temporarily, by short-term traders seeking to profit
from the differences between a contract or security price objective and their
cost of borrowed funds; (b) by investors in futures contracts electing to close
out their contracts through offsetting transactions rather than meet margin
deposit requirements; (c) by investors in futures contracts opting to make or
take delivery of underlying securities rather than engage in closing
transactions, thereby reducing liquidity of the futures markets; and (d)
temporarily, by speculators who view the deposit requirements in the futures
markets as less onerous than margin requirements in the cash market. Due to the
possibility of price distortion in the futures market and because of the
imperfect correlation between movements in the prices of securities and
movements in the prices of futures contracts, a correct forecast of interest
rate trends may still not result in a successful hedging transaction.
 
    There may exist an imperfect correlation between the price movements of
futures contracts purchased by the Fund and the movements in the prices of the
securities which are the subject of the hedge. If participants in the futures
market elect to close out their contracts through offsetting transactions rather
than meet margin deposit requirements, distortions in the normal relationship
between the debt securities and futures markets could result. Price distortions
could also result if investors in futures contracts opt to make or take delivery
of underlying securities rather than engage in closing transactions due to the
resultant reduction in the liquidity of the futures market. In addition, due to
the fact that, from the point of view of speculators, the deposit requirements
in the futures markets are less onerous than margin requirements in the cash
market, increased participation by speculators in the futures market could cause
temporary price distortions. Due to the possibility of price distortions in the
futures market and because of the imperfect correlation between movements in the
prices of securities and movements in the prices of futures contracts, a correct
forecast of interest rate trends by the Investment Manager may still not result
in a successful hedging transaction.
 
    As stated in the Prospectus, there is no assurance that a liquid secondary
market will exist for futures contracts and related options in which the Fund
may invest. In the event a liquid market does not exist, it may not be possible
to close out a futures position, and in the event of adverse price movements,
the Fund would continue to be required to make daily cash payments of variation
margin. In addition, limitations imposed by an exchange or board of trade on
which futures contracts are traded may compel or prevent the Fund from closing
out a contract which may result in reduced gain or increased loss to the Fund.
The absence of a liquid market in futures contracts might cause the Fund to make
or take delivery of the underlying securities at a time when it may be
disadvantageous to do so.
 
    Compared to the purchase or sale of futures contracts, the purchase of call
or put options on futures contracts involves less potential risk to the Fund
because the maximum amount at risk is the premium paid for the options (plus
transaction costs). However, there may be circumstances when the purchase of a
call or put option on a futures contract would result in a loss to the Fund
notwithstanding that the purchase or sale of a futures contract would not result
in a loss, as in the instance where there is no movement in the prices of the
futures contract or underlying securities.
 
                                       30
<PAGE>
    The Investment Manager and the Sub-Advisor have substantial experience in
the use of the investment techniques described above under the heading "Options
and Futures Transactions," which techniques require skills different from those
needed to select the portfolio securities underlying various options and futures
contracts.
 
    NEW INSTRUMENTS.  New futures contracts, options and other financial
products and various combinations thereof continue to be developed. The Fund may
invest in any such futures, options or products as may be developed, to the
extent consistent with its investment objective and applicable regulatory
requirements.
 
PORTFOLIO TURNOVER
 
    It is anticipated that the Fund's portfolio turnover rate will not exceed
100%. A 100% turnover rate would occur, for example, if 100% of the securities
held in the Fund's portfolio (excluding all securities whose maturities at
acquisition were one year or less) were sold and replaced within one year. For
the Fund's fiscal years ended May 31, 1997 and May 31, 1998, the Fund had
portfolio turnover rates of 46% and 178%, respectively. The increase in the
portfolio turnover rate during the fiscal year ended May 31, 1998 was due
primarily to the November 1, 1997 change in sub-advisors.
 
INVESTMENT RESTRICTIONS
- --------------------------------------------------------------------------------
 
    In addition to the investment restrictions enumerated in the Prospectus, the
investment restrictions listed below have been adopted by the Fund as
fundamental policies, except as otherwise indicated. Under the Act, a
fundamental policy may not be changed without the vote of a majority of the
outstanding voting securities of the Fund, as defined in the Act. Such a
majority is defined as the lesser of (a) 67% or more of the shares present at a
meeting of shareholders, if the holders of 50% of the outstanding shares of the
Fund are present or represented by proxy or (b) more than 50% of the outstanding
shares of the Fund.
 
    The Fund may not:
 
         1. Purchase or sell real estate or interests therein, although the Fund
    may purchase securities of issuers which engage in real estate operations
    and securities secured by real estate or interests therein.
 
         2. Purchase oil, gas or other mineral leases, rights or royalty
    contracts or exploration or development programs, except that the Fund may
    invest in the securities of companies which operate, invest in, or sponsor
    such programs.
 
         3. Borrow money, except that the Fund, (i) may borrow from a bank for
    temporary or emergency purposes and (ii) may engage in reverse repurchase
    agreements and dollar rolls, in amounts not exceeding 5% (taken at the lower
    of cost or current value) of its total assets (not including the amount
    borrowed).
 
         4. Pledge its assets or assign or otherwise encumber them except to
    secure borrowings effected within the limitations set forth in restriction
    (3). For the purpose of this restriction, collateral arrangements with
    respect to the writing of options and collateral arrangements with respect
    to initial or variation margin for futures are not deemed to be pledges of
    assets.
 
         5. Issue senior securities as defined in the Act, except insofar as the
    Fund may be deemed to have issued a senior security by reason of (a)
    entering into any repurchase or reverse repurchase agreement; (b) purchasing
    any securities on a when-issued or delayed delivery basis; (c) purchasing or
    selling futures contracts, forward foreign exchange contracts or options;
    (d) borrowing money in accordance with restrictions described above; or (e)
    lending portfolio securities.
 
                                       31
<PAGE>
         6. Make loans of money or securities, except: (a) by the purchase of
    publicly distributed debt obligations in which the Fund may invest
    consistent with its investment objective and policies; (b) by investment in
    repurchase agreements; or (c) by lending its portfolio securities.
 
         7. Make short sales of securities.
 
         8. Purchase securities on margin, except for such short-term loans as
    are necessary for the clearance of portfolio securities. The deposit or
    payment by the Fund of initial or variation margin in connection with
    futures contracts or related options thereon is not considered the purchase
    of a security on margin.
 
         9. Engage in the underwriting of securities, except insofar as the Fund
    may be deemed an underwriter under the Securities Act of 1933 in disposing
    of a portfolio security.
 
        10. Invest for the purpose of exercising control or management of any
    other issuer.
 
        11. Purchase securities of other investment companies, except in
    connection with a merger, consolidation, reorganization or acquisition of
    assets or in accordance with the provisions of Section 12(d) of the Act and
    any Rules promulgated thereunder.
 
        12. Purchase or sell commodities or commodities contracts except that
    the Fund may purchase or sell futures contracts or options on futures.
 
    In addition, as a nonfundamental policy, the Fund may not invest in other
investment companies in reliance on Sections 12(d)(1)(F), 12(d)(1)(G) or
12(d)(1)(J) of the Act.
 
    Notwithstanding any other investment policy or restriction, the Fund may
seek to achieve its investment objective by investing all or substantially all
of its assets in another investment company having substantially the same
investment objective and policies as the Fund.
 
PORTFOLIO TRANSACTIONS AND BROKERAGE
- --------------------------------------------------------------------------------
 
    Subject to the general supervision of the Trustees, the Investment Manager
and the Sub-Advisor are responsible for decisions to buy and sell securities for
the Fund, the selection of brokers and dealers to effect the transactions, and
the negotiation of brokerage commissions, if any. Purchases and sales of
securities on a stock exchange are effected through brokers who charge a
commission for their services. In the over-the-counter market, securities are
generally traded on a "net" basis with dealers acting as principal for their own
accounts without a stated commission, although the price of the security usually
includes a profit to the dealer. The Fund expects that securities will be
purchased at times in underwritten offerings where the price includes a fixed
amount of compensation, generally referred to as the underwriter's concession or
discount. Options and futures transactions will usually be effected through a
broker and a commission will be charged. On occasion, the Fund may also purchase
certain money market instruments directly from an issuer, in which case no
commissions or discounts are paid. During the fiscal years ended May 31, 1996,
1997 and 1998, the Fund paid a total of $459,719, $481,984 and $441,172,
respectively, in brokerage commissions.
 
    The Investment Manager and the Sub-Advisor currently serve as investment
advisors to a number of clients, including other investment companies, and may
in the future act as investment adviser to others. It is the practice of the
Investment Manager and the Sub-Advisor to cause purchase and sale transactions
to be allocated among the Fund and others whose assets it manages in such manner
as it deems equitable. In making such allocations among the Fund and other
client accounts, various factors may be considered, including the respective
investment objectives, the relative size of portfolio holdings of the same or
comparable securities, the availability of cash for investment, the size of
investment commitments generally held and the opinions of the persons
responsible for managing the portfolios of the Fund and other client accounts.
In the case of certain initial and secondary public offerings, the Investment
Manager utilizes a pro rata allocation process based on the size of the Morgan
Stanley Dean Witter Funds involved and the number of shares available from the
public offering.
 
                                       32
<PAGE>
    The policy of the Fund regarding purchases and sales of securities for its
portfolio is that primary consideration will be given to obtaining the most
favorable prices and efficient executions of transactions. Consistent with this
policy, when securities transactions are effected on a stock exchange, the
Fund's policy is to pay commissions which are considered fair and reasonable
without necessarily determining that the lowest possible commissions are paid in
all circumstances. The Fund believes that a requirement always to seek the
lowest possible commission cost could impede effective portfolio management and
preclude the Fund and the Investment Manager and the Sub-Advisor from obtaining
a high quality of brokerage and research services. In seeking to determine the
reasonableness of brokerage commissions paid in any transaction, the Investment
Manager and the Sub-Advisor rely upon their experience and knowledge regarding
commissions generally charged by various brokers and on its judgment in
evaluating the brokerage and research services received from the broker
effecting the transaction. Such determinations are necessarily subjective and
imprecise, and in most cases an exact dollar value for those services is not
ascertainable.
 
    The Fund anticipates that certain of its transactions involving foreign
securities will be effected on foreign securities exchanges. Fixed commissions
on such transactions are generally higher than negotiated commissions on
domestic transactions. There is also generally less government supervision and
regulation of foreign securities exchanges and brokers than in the United
States.
 
    In seeking to implement the Fund's policies, the Investment Manager and the
Sub-Advisor effect transactions with those brokers and dealers who the
Investment Manager and the Sub-Advisor believe provide the most favorable prices
and are capable of providing efficient executions. If the Investment Manager
and/or the Sub-Advisor believe such prices and executions are obtainable from
more than one broker or dealer, it may give consideration to placing portfolio
transactions with those brokers and dealers who also furnish research and other
services to the Fund or the Investment Manager and/or the Sub-Advisor. Such
services may include, but are not limited to, any one or more of the following:
information as to the availability of securities for purchase or sale;
statistical or factual information or opinions pertaining to investment; wire
services; and appraisals or evaluations of portfolio securities.
 
    The information and services received by the Investment Manager and the
Sub-Advisor from brokers and dealers may be of benefit to them in the management
of accounts of some of their other clients and may not in all cases benefit the
Fund directly. While the receipt of such information and services is useful in
varying degrees and would generally reduce the amount of research or services
otherwise performed by the Investment Manager and/or the Sub-Advisor and thereby
reduce their expenses, it is of indeterminable value and the fees paid to the
Investment Manager and the Sub-Advisor are not reduced by any amount that may be
attributable to the value of such services. During the fiscal year ended May 31,
1998, the Fund paid $0 in brokerage commissions in connection with transactions
in the aggregate amount of $0 to brokers because of research services provided.
 
    Pursuant to an order of the Securities and Exchange Commission, the Fund may
effect principal transactions in certain money market instruments with DWR. The
Fund will limit its transactions with DWR to U.S. Government and Government
Agency Securities, Bank Money Instruments (i.e., Certificates of Deposit and
Bankers' Acceptances) and Commercial Paper. Such transactions will be effected
with DWR only when the price available from DWR is better than that available
from other dealers.
 
    Consistent with the policy described above, brokerage transactions in
securities listed on exchanges or admitted to unlisted trading privileges may be
effected through DWR, Morgan Stanley & Co. Incorporated ("MS & Co."), other
affiliated brokers and dealers and/or affiliated broker-dealers of the
Sub-Advisor. Such brokerage transactions were also effected through affiliates
of the Former Sub-Advisor until November 30, 1997. In order for an affiliated
broker or dealer to effect any portfolio transactions for the Fund, the
commissions, fees or other remuneration received by them must be reasonable and
fair compared to the commissions, fees or other remuneration paid to other
brokers in connection with comparable transactions involving similar securities
being purchased or sold on an exchange during a comparable period of time. This
standard would allow an affiliated broker or dealer to receive no more than the
remuneration which would be expected to be received by an unaffiliated broker
 
                                       33
<PAGE>
in a commensurate arm's-length transaction. Furthermore, the Board of Trustees
of the Fund, including a majority of the Trustees who are not "interested"
persons of the Fund, as defined in the Act, have adopted procedures which are
reasonably designed to provide that any commissions, fees or other remuneration
paid to an affiliated broker or dealer are consistent with the foregoing
standard. The Fund does not reduce the management fee it pays to the Investment
Manager by any amount of the brokerage commissions it may pay to an affiliated
broker or dealer. During the period June 1, 1997 through May 31, 1998, the Fund
paid a total of $15,696 in brokerage commissions to MS & Co.. The brokerage
commissions paid to MS & Co. represented approximately 3.56% of the total
brokerage commissions paid by the Fund during the period and were paid on
account of transactions having an aggregate dollar value equal to approximately
10.05% of the aggregate dollar value of all portfolio transactions of the Fund
during the period for which commissions were paid.
 
THE DISTRIBUTOR
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus, shares of the Fund are distributed by Morgan
Stanley Dean Witter Distributors Inc. (the "Distributor"). The Distributor has
entered into a dealer agreement with DWR, which through its own sales
organization sells shares of the Fund. In addition, the Distributor may enter
into similar agreements with other selected dealers ("Selected Broker-Dealers").
The Distributor, a Delaware corporation, is a wholly-owned subsidiary of MSDW.
The Trustees of the Fund, including a majority of the Trustees who are not, and
were not at the time they voted, interested persons of the Fund, as defined in
the Act (the "Independent Trustees"), approved, at their meeting held on June
30, 1997, a Distribution Agreement (the "Distribution Agreement") appointing the
Distributor exclusive distributor of the Fund's shares and providing for the
Distributor to bear distribution expenses not borne by the Fund. By its terms,
the Distribution Agreement had an initial term ending April 30, 1998 and will
remain in effect from year to year thereafter if approved by the Board. At their
meeting held on April 30, 1998, the Trustees of the Fund, including a majority
of the Independent Trustees, approved the continuation of the Distribution
Agreement until April 30, 1999.
 
    The Distributor bears all expenses it may incur in providing services under
the Distribution Agreement. Such expenses include the payment of commissions for
sales of the Fund's shares and incentive compensation to Morgan Stanley Dean
Witter Financial Advisors and other selected broker-dealer representatives. The
Distributor also pays certain expenses in connection with the distribution of
the Fund's shares, including the costs of preparing, printing and distributing
advertising or promotional materials, and the costs of printing and distributing
prospectuses and supplements thereto used in connection with the offering and
sale of the Fund's shares. The Fund bears the costs of initial typesetting,
printing and distribution of prospectuses and supplements thereto to
shareholders. The Fund also bears the costs of registering the Fund and its
shares under federal securities laws and pays filing fees in accordance with
state securities laws. The Fund and the Distributor have agreed to indemnify
each other against certain liabilities, including liabilities under the
Securities Act of 1933, as amended. Under the Distribution Agreement, the
Distributor uses its best efforts in rendering services to the Fund, but in the
absence of willful misfeasance, bad faith, gross negligence or reckless
disregard of its obligations, the Distributor is not liable to the Fund or any
of its shareholders for any error of judgment or mistake of law or for any act
or omission or for any losses sustained by the Fund or its shareholders.
 
PLAN OF DISTRIBUTION
 
    The Fund has adopted a Plan of Distribution pursuant to Rule 12b-1 under the
Act (the "Plan") pursuant to which each Class, other than Class D, pursuant to
which each Class, other than Class D, pays the Distributor compensation accrued
daily and payable monthly at the following annual rates: 0.25% and 1.0% of the
average daily net assets of Class A and Class C, respectively, and, with respect
to Class B, 1.0% of the lesser of: (a) the average daily aggregate gross sales
of the Fund's Class B shares since the inception of the Fund (not including
reinvestments of dividends or capital gains distributions), less the average
daily aggregate net asset value of the Fund's Class B shares redeemed since the
Fund's inception upon which a contingent deferred sales charge has been imposed
or upon which such charge has been waived; or (b) the Fund's average daily net
assets of Class B. The Distributor receives
 
                                       34
<PAGE>
the proceeds of front-end sales charges and of contingent deferred sales charges
imposed on certain redemptions of shares, which are separate and apart from
payments made pursuant to the Plan (see "Purchase of Fund Shares" in the
Prospectus). The Distributor has informed the Fund that it and/or DWR received
(a) approximately $483,038, $441,738 and $365,257 in contingent deferred sales
charges from Class B for the fiscal years ended May 31, 1996, 1997 and 1998,
respectively, (b) approximately $0 and $96 in contingent deferred sales charges
from Class A and Class C, respectively, for the fiscal year ended May 31, 1998
and (c) approximately $3,572 in front-end sales charges from Class A for the
fiscal year ended May 31, 1998, none of which was retained by the Distributor.
 
    The Distributor has informed the Fund that the entire fee payable by Class A
and a portion of the fees payable by each of Class B and Class C each year
pursuant to the Plan equal to 0.25% of such Class's average daily net assets are
currently each characterized as a "service fee" under the Rules of the
Association of the National Association of Securities Dealers, Inc. (of which
the Distributor is a member). The "service fee" is a payment made for personal
service and/or the maintenance of shareholder accounts. The remaining portion of
the Plan fees payable by a Class, if any, is characterized as an "asset-based
sales charge" as such is defined by the aforementioned Rules of the Association.
 
    The Plan was adopted by a vote of the Trustees of the Fund on May 10, 1994,
at a meeting of the Trustees called for the purpose of voting on such Plan. The
vote included the vote of a majority of the Trustees of the Fund who are not
"interested persons" of the Fund (as defined in the Act) and who have no direct
or indirect financial interest in the operation of the Plan (the "Independent
12b-1 Trustees"). In making their decision to adopt the Plan, the Trustees
requested from the Distributor and received such information as they deemed
necessary to make an informed determination as to whether or not adoption of the
Plan was in the best interests of the shareholders of the Fund. After due
consideration of the information received, the Trustees, including the
Independent 12b-1 Trustees, determined that adoption of the Plan would benefit
the shareholders of the Fund. MSDW Advisors, as sole shareholder of the Fund,
approved the Plan on June 2, 1994, whereupon the Plan went into effect. At their
meeting held on October 26, 1995, the Trustees of the Fund, including all of the
Independent 12b-1 Trustees, approved an amendment to the Plan to permit payments
to be made under the Plan with respect to certain distribution expenses incurred
in connection with the distribution of shares, including personal services to
shareholders with respect to holdings of such shares, of an investment company
whose assets are acquired by the Fund in a tax-free reorganization. At their
meeting held on June 30, 1997, the Trustees, including a majority of the
Independent 12b-1 Trustees, approved amendments to the Plan to reflect the
multiple-class structure for the Fund, which took effect on July 28, 1997.
 
    Under the Plan and as required by Rule 12b-1, the Trustees receive and
review promptly after the end of each calendar quarter a written report provided
by the Distributor of the amounts expended by the Distributor under the Plan and
the purpose for which such expenditures were made. Class B shares of the Fund
accrued $812,930 payable to the Distributor, under the Plan, for the fiscal year
ended May 31, 1998. This is an accrual at an annual rate of 1.0% of the average
daily net assets of Class B for the fiscal year and was calculated pursuant to
clause (b) under the Plan. This 12b-1 fee is treated by the Fund as an expense
in the year it is accrued. For the fiscal period July 28, 1997 through May 31,
1998, Class A and Class C shares of the Fund accrued payments under the Plan
amounting to $180 and $533, respectively, which amounts are equal to 0.24% and
1.00% of the average daily net assets of Class A and Class C, respectively, for
such period.
 
    The Plan was adopted in order to permit the implementation of the Fund's
method of distribution. Under this distribution method the Fund offers four
Classes of shares, each with a different distribution arrangement as set forth
in the Prospectus.
 
    With respect to Class A shares, DWR compensates its Financial Advisors by
paying them, from proceeds of the front-end sales charge, commissions for the
sale of Class A shares, currently a gross sales credit of up to 5.0% of the
amount sold (except as provided in the following sentence) and an annual
residual commission, currently a residual of up to 0.25% of the current value of
the respective accounts for which they are the Financial Advisors or dealers of
record in all cases. On orders of
 
                                       35
<PAGE>
$1 million or more (for which no sales charge was paid) or net asset value
purchases by employer-sponsored 401(k) and other plans qualified under Section
401(a) of the Internal Revenue Code ("Qualified Retirement Plans") for which
Morgan Stanley Dean Witter Trust FSB ("MSDW Trust") serves as Trustee or DWR's
Retirement Plan Services serves as recordkeeper pursuant to a written
Recordkeeping Services Agreement, the Investment Manager compensates DWR's
Financial Advisors by paying them, from its own funds, a gross sales credit of
1.0% of the amount sold.
 
    With respect to Class B shares, DWR compensates its Financial Advisors by
paying them, from its own funds, commissions for the sale of Class B shares,
currently a gross sales credit of up to 5.0% of the amount sold (except as
provided in the following sentence) and an annual residual commission, currently
a residual of up to 0.25% of the current value (not including reinvested
dividends or distributions) of the amount sold in all cases. In the case of
Class B shares purchased on or after July 28, 1997 by Qualified Retirement Plans
for which MSDW Trust serves as Trustee or DWR's Retirement Plan Services serves
as recordkeeper pursuant to a written Recordkeeping Services Agreement, DWR
compensates its Financial Advisors by paying them, from its own funds, a gross
sales credit of 3.0% of the amount sold.
 
    With respect to Class C shares, DWR compensates its Financial Advisors by
paying them, from its own funds, commissions for the sale of Class C shares,
currently a gross sales credit of up to 1.0% of the amount sold and an annual
residual commission, currently a residual of up to 1.0% of the current value of
the respective accounts for which they are the Financial Advisors of record.
 
    With respect to Class D shares other than shares held by participants in
MSDW Advisors mutual fund asset allocation program, the Investment Manager
compensates DWR's Financial Advisors by paying them, from its own funds,
commissions for the sale of Class D shares, currently a gross sales credit of up
to 1.0% of the amount sold. There is a chargeback of 100% of the amount paid if
the Class D shares are redeemed in the first year and a chargeback of 50% of the
amount paid if the Class D shares are redeemed in the second year after
purchase. The Investment Manager also compensates DWR's Financial Advisors by
paying them, from its own funds, an annual residual commission, currently a
residual of up to 0.10% of the current value of the respective accounts for
which they are the Financial Advisors of record (not including accounts of
participants in the MSDW Advisors mutual fund asset allocation program).
 
    The gross sales credit is a charge which reflects commissions paid by DWR to
its Financial Advisors and DWR's Fund-associated distribution-related expenses,
including sales compensation, and overhead and other branch office
distribution-related expenses including (a) the expenses of operating DWR's
branch offices in connection with the sale of Fund shares, including lease
costs, the salaries and employee benefits of operations and sales support
personnel, utility costs, communications costs and the costs of stationery and
supplies, (b) the costs of client sales seminars, (c) travel expenses of mutual
fund sales coordinators to promote the sale of Fund shares and (d) other
expenses relating to branch promotion of Fund sales. The distribution fee that
the Distributor receives from the Fund under the Plan, in effect, offsets
distribution expenses incurred under the Plan on behalf of the Fund and, in the
case of Class B shares, opportunity costs, such as the gross sales credit and an
assumed interest charge thereon ("carrying charge"). In the Distributor's
reporting of the distribution expenses to the Fund, in the case of Class B
shares, such assumed interest (computed at the "broker's call rate") has been
calculated on the gross credit as it is reduced by amounts received by the
Distributor under the Plan and any contingent deferred sales charges received by
the Distributor upon redemption of shares of the Fund. No other interest charge
is included as a distribution expense in the Distributor's calculation of its
distribution costs for this purpose. The broker's call rate is the interest rate
charged to securities brokers on loans secured by exchange-listed securities.
 
    The Fund is authorized to reimburse expenses incurred or to be incurred in
promoting the distribution of the Fund's Class A and Class C shares and in
servicing shareholder accounts. Reimbursement will be made through payments at
the end of each month. The amount of each monthly payment may in no event exceed
an amount equal to a payment at the annual rate of 0.25%, in the case of Class
A, and
 
                                       36
<PAGE>
1.0%, in the case of Class C, of the average net assets of the respective Class
during the month. No interest or other financing charges, if any, incurred on
any distribution expenses on behalf of Class A and Class C will be reimbursable
under the Plan. With respect to Class A, in the case of all expenses other than
expenses representing the service fee, and, with respect to Class C, in the case
of all expenses other than expenses representing a gross sales credit or a
residual to Morgan Stanley Dean Witter Financial Advisors and other selected
broker-dealer representatives, such amounts shall be determined at the beginning
of each calendar quarter by the Trustees, including a majority of the
Independent 12b-1 Trustees. Expenses representing the service fee (for Class A)
or a gross sales credit or a residual to Morgan Stanley Dean Witter Financial
Advisors and other selected broker-dealer representatives (for Class C) may be
reimbursed without prior determination. In the event that the Distributor
proposes that monies shall be reimbursed for other than such expenses, then in
making quarterly determinations of the amounts that may be reimbursed by the
Fund, the Distributor will provide and the Trustees will review a quarterly
budget of projected distribution expenses to be incurred on behalf of the Fund,
together with a report explaining the purposes and anticipated benefits of
incurring such expenses. The Trustees will determine which particular expenses,
and the portions thereof, that may be borne by the Fund, and in making such a
determination shall consider the scope of the Distributor's commitment to
promoting the distribution of the Fund's Class A and Class C shares.
 
    Each Class paid 100% of the amounts accrued under the Plan with respect to
that Class for the fiscal year ended May 31, 1998 to the Distributor. The
Distributor and DWR estimates it has spent, pursuant to the Plan, $13,782,781 on
behalf of Class B since the inception of the Plan. It is estimated that this
amount was spent in approximately the following ways: (i) 22.80%
($3,141,859)--advertising and promotional expenses; (ii) 1.59%
($218,901)--printing of prospectuses for distribution to other than current
stockholders; and (iii) 75.61% ($10,422,021)--other expenses, including the
gross sales credit and the carrying charges of which 10.46% ($1,090,420)
represents carrying charges, 35.84% ($3,735,440) represents commission credits
to DWR branch offices for payments of commissions to Morgan Stanley Dean Witter
Financial Advisors and other selected broker-dealer representatives and 53.70%
($5,596,161) represents overhead and other branch office distribution-related
expenses. The amounts accrued by Class A and Class C for distribution during the
fiscal period July 28, 1997 through May 31, 1998 were for expenses which relate
to compensation of sales personnel and associated overhead expenses.
 
    In the case of Class B shares, at any given time, the expenses in
distributing shares of the Fund may be more or less than the total of (i) the
payments made by the Fund pursuant to the Plan and (ii) the proceeds of
contingent deferred sales charges paid by investors upon redemption of shares.
The Distributor has advised the Fund that in the case of Class B shares the
excess distribution expenses, including the carrying charge designed to
approximate the opportunity costs incurred by DWR which arise from it having
advanced monies without having received the amount of any sales charges imposed
at the time of sale of the Fund's Class B shares, totalled $8,243,906 as of May
31, 1998. Because there is no requirement under the Plan that the Distributor be
reimbursed for distribution expenses with respect to Class B shares or any
requirement that the Plan be continued from year to year, this excess amount
does not constitute a liability of the Fund. Although there is no legal
obligation for the Fund to pay distribution expenses in excess of payments made
under the Plan and the proceeds of contingent deferred sales charges paid by
investors upon redemption of shares, if for any reason the Plan is terminated,
the Trustees will consider at that time the manner in which to treat such
expenses. Any cumulative expenses incurred, but not yet recovered through
distribution fees or contingent deferred sales charges, may or may not be
recovered through future distribution fees or contingent deferred sales charges.
 
    No interested person of the Fund nor any Trustee of the Fund who is not an
interested person of the Fund, as defined in the Act, has any direct or indirect
financial interest in the operation of the Plan except to the extent that the
Distributor, MSDW Advisors, MSDW Services or certain of their employees may be
deemed to have such an interest as a result of benefits derived from the
successful operation of the Plan or as a result of receiving a portion of the
amounts expended thereunder by the Fund.
 
                                       37
<PAGE>
    Under its terms, the Plan had an initial term ending April 30, 1995 and will
continue from year to year thereafter, provided such continuance is approved
annually by a vote of the Trustees in the manner described above. The most
recent continuance of the Plan for one year, until April 30, 1999, was approved
by the Board of Trustees of the Fund, including a majority of the Independent
12b-1 Trustees, at a Board meeting held on April 30, 1998. Prior to approving
the continuation of the Plan, the Trustees requested and received from the
Distributor and reviewed all the information which they deemed necessary to
arrive at an informed determination. In making their determination to continue
the Plan, the Trustees considered: (1) the Fund's experience under the Plan and
whether such experience indicates that the Plan is operating as anticipated; (2)
the benefits the Fund had obtained, was obtaining and would be likely to obtain
under the Plan; and (3) what services had been provided and were continuing to
be provided under the Plan to the Fund and its shareholders. Based upon their
review, the Trustees of the Fund, including each of the Independent 12b-1
Trustees, determined that continuation of the Plan would be in the best interest
of the Fund and would have a reasonable likelihood of continuing to benefit the
Fund and its shareholders. In the Trustees' quarterly review of the Plan, they
will consider its continued appropriateness and the level of compensation
provided therein.
 
    The Plan may not be amended to increase materially the amount to be spent
for the services described therein without approval of the shareholders of the
affected Class or Classes of the Fund, and all material amendments of the Plan
must also be approved by the Trustees in the manner described above. The Plan
may be terminated at any time, without payment of any penalty, by vote of a
majority of the Independent 12b-1 Trustees or by a vote of a majority of the
outstanding voting securities of the Fund (as defined in the Act) on not more
than thirty days' written notice to any other party to the Plan. So long as the
Plan is in effect, the election and nomination of Independent Trustees shall be
committed to the discretion of the Independent Trustees.
 
DETERMINATION OF NET ASSET VALUE
- --------------------------------------------------------------------------------
 
    The net asset value per share for each Class of shares of the Fund is
determined once daily at 4:00 p.m. New York time on each day that the New York
Stock Exchange is open (or, on days when the New York Stock Exchange closes
prior to 4:00 p.m., at such earlier time), and on each other day in which there
is a sufficient degree of trading in the Fund's investments to affect the net
asset value, except that the net asset value may not be computed on a day on
which no orders to purchase, or tenders to sell or redeem, Fund shares have been
received. The New York Stock Exchange currently observes the following holidays:
New Year's Day; Reverend Dr. Martin Luther King, Jr. Day; President's Day; Good
Friday; Memorial Day; Independence Day; Labor Day; Thanksgiving Day; and
Christmas Day.
 
    As stated in the Prospectus, short-term securities with remaining maturities
of 60 days or less at the time of purchase are valued at amortized cost, unless
the Trustees determine such does not reflect the securities' market value, in
which case these securities will be valued at their fair value as determined by
the Trustees. Other short-term debt securities will be valued on a
mark-to-market basis until such time as they reach a remaining maturity of 60
days, whereupon they will be valued at amortized cost using their value on the
61st day unless the Trustees determine such does not reflect the securities'
market value, in which case these securities will be valued at their fair value
as determined by the Trustees. Listed options on debt securities are valued at
the latest sale price on the exchange on which they are listed unless no sales
of such options have taken place that day, in which case they will be valued at
the mean between their latest bid and asked prices. Unlisted options on debt
securities and all options on equity securities are valued at the mean between
their latest bid and asked prices. Futures are valued at the latest sale price
on the commodities exchange on which they trade unless the Trustees determine
that such price does not reflect their market value, in which case they will be
valued at their fair value as determined by the Trustees. All other securities
and other assets are valued at their fair value as determined in good faith
under procedures established by and under the supervision of the Trustees.
 
                                       38
<PAGE>
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus, the Fund offers four Classes of shares as
follows:
 
INITIAL SALES CHARGE ALTERNATIVE--CLASS A SHARES
 
    Class A shares are sold to investors with an initial sales charge that
declines to zero for larger purchases; however, Class A shares sold without an
initial sales charge are subject to a contingent deferred sales charge ("CDSC")
of 1.0% if redeemed within one year of purchase, except in the circumstances
discussed in the Prospectus.
 
    RIGHT OF ACCUMULATION.  As discussed in the Prospectus, investors may
combine the current value of shares purchased in separate transactions for
purposes of benefitting from the reduced sales charges available for purchases
of shares of the Fund totalling at least $25,000 in net asset value. For
example, if any person or entity who qualifies for this privilege holds Class A
shares of the Fund and/or other Morgan Stanley Dean Witter Funds that are
multiple class funds ("Morgan Stanley Dean Witter Multi-Class Funds") or shares
of other Morgan Stanley Dean Witter Funds sold with a front-end sales charge
purchased at a price including a front-end sales charge having a current value
of $5,000, and purchases $20,000 of additional shares of the Fund, the sales
charge applicable to the $20,000 purchase would be 4.75% of the offering price.
 
    The Distributor must be notified by the selected broker-dealer or the
shareholder at the time a purchase order is placed that the purchase qualifies
for the reduced charge under the Right of Accumulation. Similar notification
must be made in writing by the selected broker-dealer or shareholder when such
an order is placed by mail. The reduced sales charge will not be granted if: (a)
such notification is not furnished at the time of the order; or (b) a review of
the records of the Distributor or Morgan Stanley Dean Witter Trust FSB ("MSDW
Trust" or the "Transfer Agent") fails to confirm the investor's represented
holdings.
 
    LETTER OF INTENT.  As discussed in the Prospectus, reduced sales charges are
available to investors who enter into a written Letter of Intent providing for
the purchase, within a thirteen-month period, of Class A shares of the Fund from
the Distributor or from a single Selected Broker-Dealer.
 
    A Letter of Intent permits an investor to establish a total investment goal
to be achieved by any number of purchases over a thirteen-month period. Each
purchase of Class A shares made during the period will receive the reduced sales
commission applicable to the amount represented by the goal, as if it were a
single purchase. A number of shares equal in value to 5% of the dollar amount of
the Letter of Intent will be held in escrow by the Transfer Agent, in the name
of the shareholder. The initial purchase under a Letter of Intent must be equal
to at least 5% of the stated investment goal.
 
    The Letter of Intent does not obligate the investor to purchase, nor the
Fund to sell, the indicated amount. In the event the Letter of Intent goal is
not achieved within the thirteen-month period, the investor is required to pay
the difference between the sales charge otherwise applicable to the purchases
made during this period and sales charges actually paid. Such payment may be
made directly to the Distributor or, if not paid, the Distributor is authorized
by the shareholder to liquidate a sufficient number of his or her escrowed
shares to obtain such difference.
 
    If the goal is exceeded and purchases pass the next sales charge level, the
sales charge on the entire amount of the purchase that results in passing that
level and on subsequent purchases will be subject to further reduced sales
charges in the same manner as set forth above under "Right of Accumulation," but
there will be no retroactive reduction of sales charges on previous purchases.
For the purpose of determining whether the investor is entitled to a further
reduced sales charge applicable to purchases at or above a sales charge level
which exceeds the stated goal of a Letter of Intent, the cumulative current net
asset value of any shares owned by the investor in any other Morgan Stanley Dean
Witter Funds held by the shareholder which were previously purchased at a price
including a front-end sales charge (including shares of the Fund and other
Morgan Stanley Dean Witter Funds acquired in exchange for those shares, and
including in each case shares acquired through reinvestment of
 
                                       39
<PAGE>
dividends and distributions) will be added to the cost or net asset value of
shares of the Fund owned by the investor. However, shares of "Exchange Funds"
(see "Shareholder Services--Exchange Privilege") and the purchase of shares of
other Morgan Stanley Dean Witter Funds will not be included in determining
whether the stated goal of a Letter of Intent has been reached.
 
    At any time while a Letter of Intent is in effect, a shareholder may, by
written notice to the Distributor, increase the amount of the stated goal. In
that event, only shares purchased during the previous 90-day period and still
owned by the shareholder will be included in the new sales charge reduction. The
5% escrow and minimum purchase requirements will be applicable to the new stated
goal. Investors electing to purchase shares of the Fund pursuant to a Letter of
Intent should carefully read such Letter of Intent.
 
CONTINGENT DEFERRED SALES CHARGE ALTERNATIVE--CLASS B SHARES
 
    Class B shares are sold without an initial sales charge but are subject to a
CDSC payable upon most redemptions within six years after purchase. As stated in
the Prospectus, a CDSC will be imposed on any redemption by an investor if after
such redemption the current value of the investor's Class B shares of the Fund
is less than the dollar amount of all payments by the shareholder for the
purchase of Class B shares during the preceding six years (or, in the case of
shares held by certain Qualified Retirement Plans, three years). However, no
CDSC will be imposed to the extent that the net asset value of the shares
redeemed does not exceed: (a) the current net asset value of shares purchased
more than six years (or, in the case of shares held by certain Qualified
Retirement Plans, three years) prior to the redemption, plus (b) the current net
asset value of shares purchased through reinvestment of dividends or
distributions of the Fund or another Morgan Stanley Dean Witter Fund (see
"Shareholder Services-- Targeted Dividends"), plus (c) the current net asset
value of shares acquired in exchange for (i) shares of Morgan Stanley Dean
Witter front-end sales charge funds, or (ii) shares of other Morgan Stanley Dean
Witter Funds for which shares of front-end sales charge funds have been
exchanged (see "Shareholder Services--Exchange Privilege"), plus (d) increases
in the net asset value of the investor's shares above the total amount of
payments for the purchase of Fund shares made during the preceding six (three)
years. The CDSC will be paid to the Distributor.
 
    In determining the applicability of the CDSC to each redemption, the amount
which represents an increase in the net asset value of the investor's shares
above the amount of the total payments for the purchase of shares within the
last six years (or, in the case of shares held by certain Qualified Retirement
Plans, three years) will be redeemed first. In the event the redemption amount
exceeds such increase in value, the next portion of the amount redeemed will be
the amount which represents the net asset value of the investor's shares
purchased more than six (three) years prior to the redemption and/or shares
purchased through reinvestment of dividends or distributions and/or shares
acquired in exchange for shares of Morgan Stanley Dean Witter front-end sales
charge funds, or for shares of other Morgan Stanley Dean Witter Funds for which
shares of front-end sales charge funds have been exchanged. A portion of the
amount redeemed which exceeds an amount which represents both such increase in
value and the value of shares purchased more than six years (or, in the case of
shares held by certain Qualified Retirement Plans, three years) prior to the
redemption and/or shares purchased through reinvestment of dividends or
distributions and/or shares acquired in the above-described exchanges will be
subject to a CDSC.
 
    The amount of the CDSC, if any, will vary depending on the number of years
from the time of payment for the purchase of Class B shares of the Fund until
the time of redemption of such shares. For purposes of determining the number of
years from the time of any payment for the purchase of shares, all payments made
during a month will be aggregated and deemed to have been made on the last day
of
 
                                       40
<PAGE>
the month. The following table sets forth the rates of the CDSC applicable to
most Class B shares of the Fund:
 
<TABLE>
<CAPTION>
YEAR SINCE
PURCHASE                                                                                     CDSC AS A PERCENTAGE OF
PAYMENT MADE                                                                                     AMOUNT REDEEMED
- ------------------------------------------------------------------------------------------  --------------------------
<S>                                                                                         <C>
First.....................................................................................               5.0%
Second....................................................................................               4.0%
Third.....................................................................................               3.0%
Fourth....................................................................................               2.0%
Fifth.....................................................................................               2.0%
Sixth.....................................................................................               1.0%
Seventh and thereafter....................................................................             None
</TABLE>
 
    The following table sets forth the rates of the CDSC applicable to Class B
shares of the Fund purchased on or after July 28, 1997 by Qualified Retirement
Plans for which MSDW Trust serves as Trustee or DWR's Retirement Plan Services
serves as recordkeeper pursuant to a written Recordkeeping Services Agreement:
 
<TABLE>
<CAPTION>
YEAR SINCE
PURCHASE                                                                                     CDSC AS A PERCENTAGE OF
PAYMENT MADE                                                                                     AMOUNT REDEEMED
- ------------------------------------------------------------------------------------------  --------------------------
<S>                                                                                         <C>
First.....................................................................................               2.0%
Second....................................................................................               2.0%
Third.....................................................................................               1.0%
Fourth and thereafter.....................................................................             None
</TABLE>
 
    In determining the rate of the CDSC, it will be assumed that a redemption is
made of shares held by the investor for the longest period of time within the
applicable six-year or three-year period. This will result in any such CDSC
being imposed at the lowest possible rate. The CDSC will be imposed, in
accordance with the table shown above, on any redemptions within six years (or,
in the case of shares held by certain Qualified Retirement Plans, three years)
of purchase which are in excess of these amounts and which redemptions do not
qualify for waiver of the CDSC, as described in the Prospectus.
 
LEVEL LOAD ALTERNATIVE--CLASS C SHARES
 
    Class C shares are sold without a sales charge but are subject to a CDSC of
1.0% on most redemptions made within one year after purchase, except in the
circumstances discussed in the Prospectus.
 
NO LOAD ALTERNATIVE--CLASS D SHARES
 
    Class D shares are offered without any sales charge on purchase or
redemption. Class D shares are offered only to those persons meeting the
qualifications set forth in the Prospectus.
 
SHAREHOLDER SERVICES
- --------------------------------------------------------------------------------
 
    Upon the purchase of shares of the Fund, a Shareholder Investment Account is
opened for the investor on the books of the Fund and maintained by the Transfer
Agent. This is an open account in which shares owned by the investor are
credited by the Transfer Agent in lieu of issuance of a share certificate. If a
share certificate is desired, it must be requested in writing for each
transaction. Certificates are issued only for full shares and may be redeposited
in the account at any time. There is no charge to the investor for issuance of a
certificate. Whenever a shareholder instituted transaction takes place in the
Shareholder Investment Account, the shareholder will be mailed a confirmation of
the transaction from the Fund or from DWR or other selected broker-dealer.
 
    AUTOMATIC INVESTMENT OF DIVIDENDS AND DISTRIBUTIONS.  As stated in the
Prospectus, all income dividends and capital gains distributions are
automatically paid in full and fractional shares of the applicable Class of the
Fund, unless the shareholder requests that they be paid in cash. Each purchase
of shares of the Fund is made upon the condition that the Transfer Agent is
thereby automatically
 
                                       41
<PAGE>
appointed as agent of the investor to receive all dividends and capital gains
distributions on shares owned by the investor. Such dividends and distributions
will be paid, at the net asset value per share, in shares of the applicable
Class of the Fund (or in cash if the shareholder so requests) as of the close of
business on the record date. At any time an investor may request the Transfer
Agent, in writing, to have subsequent dividends and/or capital gains
distributions paid to him or her in cash rather than shares. To assure
sufficient time to process the charge, such request should be received by the
Transfer Agent at least five business days prior to the record date of the
dividend or distribution. In the case of recently purchased shares for which
registration instructions have not been received on the record date, cash
payments will be made to the Distributor, which will be forwarded to the
shareholder, upon the receipt of proper instructions. It has been and remains
the Fund's policy and practice that, if checks for dividends or distributions
paid in cash remain uncashed, no interest will accrue on amounts represented by
such uncashed checks.
 
    TARGETED DIVIDENDS-SM-.  In states where it is legally permissible,
shareholders may also have all income dividends and capital gains distributions
automatically invested in shares of any Class of an open-end Morgan Stanley Dean
Witter Fund other than Morgan Stanley Dean Witter International SmallCap Fund or
in another Class of Morgan Stanley Dean Witter International SmallCap Fund. Such
investment will be made as described above for automatic investment in shares of
the applicable Class of the Fund, at the net asset value per share of the
selected Morgan Stanley Dean Witter Fund as of the close of business on the
payment date of the dividend or distribution and will begin to earn dividends,
if any, in the selected Morgan Stanley Dean Witter Fund the next business day.
To participate in the Targeted Dividends program, shareholders should contact
their Morgan Stanley Dean Witter Financial Advisor or other selected
broker-dealer representative. Shareholders of Morgan Stanley Dean Witter
International SmallCap Fund must be shareholders of the selected Class of the
Morgan Stanley Dean Witter Fund targeted to receive investments from dividends
at the time they enter the Targeted Dividends program. Investors should review
the prospectus of the targeted Morgan Stanley Dean Witter Fund before entering
the program.
 
    EASYINVEST-SM-.  Shareholders may subscribe to EasyInvest, an automatic
purchase plan which provides for any amount from $100 to $5,000 to be
transferred automatically from a checking or savings account or following
redemption of shares of a Morgan Stanley Dean Witter money market fund, on a
semi-monthly, monthly or quarterly basis, to the Transfer Agent for investment
in shares of the Fund. Shares purchased through EasyInvest will be added to the
shareholder's existing account at the net asset value calculated the same
business day the transfer of funds is effected (subject to any applicable sales
charges). Shares of the Morgan Stanley Dean Witter money market funds redeemed
in connection with EasyInvest are redeemed on the business day preceding the
transfer of funds. For further information or to subscribe to EasyInvest,
shareholders should contact their Morgan Stanley Dean Witter Financial Advisor
or other selected broker-dealer representative or the Transfer Agent.
 
    INVESTMENT OF DIVIDENDS OR DISTRIBUTIONS RECEIVED IN CASH.  As discussed in
the Prospectus, any shareholder who receives a cash payment representing a
dividend or distribution may invest such dividend or distribution in shares of
the applicable Class at the net asset value next determined after receipt by the
Transfer Agent, without the imposition of a CDSC upon redemption, by returning
the check or the proceeds to the Transfer Agent within thirty days after the
payment date. If the shareholder returns the proceeds of a dividend or
distribution, such funds must be accompanied by a signed statement indicating
that the proceeds constitute a dividend or distribution to be invested. Such
investment will be made at the net asset value per share next determined after
receipt of the check or proceeds by the Transfer Agent.
 
    SYSTEMATIC WITHDRAWAL PLAN.  As discussed in the Prospectus, a systematic
withdrawal plan (the "Withdrawal Plan") is available for shareholders who own or
purchase shares of the Fund having a minimum value of $10,000 based upon the
then current net asset value. The Withdrawal Plan provides for monthly or
quarterly (March, June, September and December) checks in any dollar amount, not
less than $25, or in any whole percentage of the account balance, on an
annualized basis. Any applicable CDSC will be imposed on shares redeemed under
the Withdrawal Plan (see "Purchase of Fund Shares"). Therefore, any shareholder
participating in the Withdrawal Plan will have sufficient shares
 
                                       42
<PAGE>
redeemed from his or her account so that the proceeds (net of any applicable
CDSC) to the shareholder will be the designated monthly or quarterly amount.
 
    The Transfer Agent acts as an agent for the shareholder in tendering to the
Fund for redemption sufficient full and fractional shares to provide the amount
of the periodic withdrawal payment designated in the application. The shares
will be redeemed at their net asset value determined, at the shareholder's
option, on the tenth or twenty-fifth day (or next following business day) of the
relevant month or quarter and normally a check for the proceeds will be mailed
by the Transfer Agent within five business days after the date of redemption.
The Withdrawal Plan may be terminated at any time by the Fund.
 
    Withdrawal Plan payments should not be considered as dividends, yields or
income. If periodic withdrawal plan payments continuously exceed net investment
income and net capital gains, the shareholder's original investment will be
correspondingly reduced and ultimately exhausted.
 
    Each withdrawal constitutes a redemption of shares and any gain or loss
realized must be recognized for Federal income tax purposes. Although the
shareholder may make additional investments of $2,500 or more under the
Withdrawal Plan, withdrawals made concurrently with purchases of additional
shares may be inadvisable because of the sales charges which may be applicable
to purchases or redemptions of shares (see "Purchase of Fund Shares").
 
    Any shareholder who wishes to have payments under the Withdrawal Plan made
to a third party or sent to an address other than the one listed on the account
must send complete written instructions to the Transfer Agent to enroll in the
Withdrawal Plan. The shareholder's signature on such instructions must be
guaranteed by an eligible guarantor acceptable to the Transfer Agent
(shareholders should contact the Transfer Agent for a determination as to
whether a particular institution is such an eligible guarantor). A shareholder
may, at any time, change the amount and interval of withdrawal payments through
his or her Morgan Stanley Dean Witter Financial Advisor or other selected
broker-dealer representative or by written nomination to the Transfer Agent. In
addition, the party and/or the address to which the checks are mailed may be
changed by written notification to the Transfer Agent, with signature guarantees
required in the manner described above. The shareholder may also terminate the
Withdrawal Plan at any time by written notice to the Transfer Agent. In the
event of such termination, the account will be continued as a regular
shareholder investment account. The shareholder may also redeem all or part of
the shares held in the Withdrawal Plan account (see "Redemptions and
Repurchases" in the Prospectus) at any time.
 
    DIRECT INVESTMENTS THROUGH TRANSFER AGENT.  As discussed in the Prospectus,
shareholders may make additional investments in any Class of shares of the Fund
for which they qualify at any time by sending a check in any amount, not less
than $100, payable to Morgan Stanley Dean Witter International SmallCap Fund,
and indicating the selected Class, directly to the Fund's Transfer Agent. In the
case of Class A shares, after deduction of any applicable sales charge, the
balance will be applied to the purchase of Fund shares, and, in the case of
shares of the other Classes, the entire amount will be applied to the purchase
of Fund shares, at the net asset value per share next computed after receipt of
the check or purchase payment by the Transfer Agent. The shares so purchased
will be credited to the investor's account.
 
EXCHANGE PRIVILEGE
 
    As discussed in the Prospectus, the Fund makes available to its shareholders
an Exchange Privilege whereby shareholders of each Class of the Fund may
exchange their shares for shares of the same Class of shares of any other Morgan
Stanley Dean Witter Multi-Class Fund without the imposition of any exchange fee.
Shares may also be exchanged for shares of any of the following funds: Morgan
Stanley Dean Witter Short-Term U.S. Treasury Trust, Morgan Stanley Dean Witter
Limited Term Municipal Trust, Morgan Stanley Dean Witter Short-Term Bond Fund
and five Morgan Stanley Dean Witter Funds which are money market funds (the
foregoing eight funds are hereinafter referred to as the "Exchange Funds").
Class A shares may also be exchanged for shares of Morgan Stanley Dean Witter
Multi-State Municipal Series Trust and Morgan Stanley Dean Witter Hawaii
Municipal Trust, which are Morgan Stanley Dean Witter Funds sold with a
front-end sales charge ("FSC Funds"). Class B shares may also be exchanged for
shares of Morgan Stanley Dean Witter Global Short-Term Income Fund Inc. ("Global
 
                                       43
<PAGE>
Short-Term"), which is a Morgan Stanley Dean Witter Fund offered with a CDSC.
Exchanges may be made after the shares of the Fund acquired by purchase (not by
exchange or dividend reinvestment) have been held for thirty days. There is no
waiting period for exchanges of shares acquired by exchange or dividend
reinvestment. An exchange will be treated for federal income tax purposes the
same as a repurchase or redemption of shares, on which the shareholder may
realize a capital gain or loss.
 
    Any new account established through the Exchange Privilege will have the
same registration and cash dividend or dividend reinvestment plan as the present
account, unless the Transfer Agent receives written notification to the
contrary. For telephone exchanges, the exact registration of the existing
account and the account number must be provided.
 
    Any shares held in certificate form cannot be exchanged but must be
forwarded to the Transfer Agent and deposited into the shareholder's account
before being eligible for exchange. (Certificates mailed in for deposit should
not be endorsed.)
 
    As described below, and in the Prospectus under the captions "Purchase of
Fund Shares," a CDSC may be imposed upon a redemption, depending on a number of
factors, including the number of years from the time of purchase until the time
of redemption or exchange ("holding period"). When shares of a Morgan Stanley
Dean Witter Multi-Class Fund or Global Short-Term are exchanged for shares of an
Exchange Fund, the exchange is executed at no charge to the shareholder, without
the imposition of the CDSC at the time of the exchange. During the period of
time the shareholder remains in the Exchange Fund (calculated from the last day
of the month in which the Exchange Fund shares were acquired), the holding
period or "year since purchase payment made" is frozen. When shares are redeemed
out of the Exchange Fund, they will be subject to a CDSC which would be based
upon the period of time the shareholder held shares in a Morgan Stanley Dean
Witter Multi-Class Fund or in Global Short-Term. However, in the case of shares
exchanged into an Exchange Fund on or after April 23, 1990, upon a redemption of
shares which results in a CDSC being imposed, a credit (not to exceed the amount
of the CDSC) will be given in an amount equal to the Exchange Fund 12b-1
distribution fees, if any, incurred on or after that date which are attributable
to those shares. Shareholders acquiring shares of an Exchange Fund pursuant to
this exchange privilege may exchange those shares back into a Morgan Stanley
Dean Witter Multi-Class Fund or Global Short-Term from the Exchange Fund, with
no CDSC being imposed on such exchange. The holding period previously frozen
when shares were first exchanged for shares of the Exchange Fund resumes on the
last day of the month in which shares of a Morgan Stanley Dean Witter
Multi-Class Fund or Global Short-Term are reacquired. A CDSC is imposed only
upon an ultimate redemption, based upon the time (calculated as described above)
the shareholder was invested in a Morgan Stanley Dean Witter Multi-Class Fund or
in Global Short-Term. In the case of exchanges of Class A shares which are
subject to a CDSC, the holding period also includes the time (calculated as
described above) the shareholder was invested in a FSC Fund.
 
    When shares initially purchased in a Morgan Stanley Dean Witter Multi-Class
Fund or in Global Short-Term are exchanged for shares of a Morgan Stanley Dean
Witter Multi-Class Fund, shares of Global Short-Term, shares of a FSC Fund, or
shares of an Exchange Fund, the date of purchase of the shares of the fund
exchanged into, for purposes of the CDSC upon redemption, will be the last day
of the month in which the shares being exchanged were originally purchased. In
allocating the purchase payments between funds for purposes of the CDSC, the
amount which represents the current net asset value of shares at the time of the
exchange which were (i) purchased more than one, three or six years (depending
on the CDSC schedule applicable to the shares) prior to the exchange, (ii)
originally acquired through reinvestment of dividends or distributions and (iii)
acquired in exchange for shares of FSC Funds, or for shares of other Morgan
Stanley Dean Witter Funds for which shares of FSC Funds have been exchanged (all
such shares called "Free Shares"), will be exchanged first. After an exchange,
all dividends earned on shares in an Exchange Fund will be considered Free
Shares. If the exchanged amount exceeds the value of such Free Shares, an
exchange is made, on a block-by-block basis, of non-Free Shares held for the
longest period of time (except that, with respect to Class B shares, if shares
held for identical periods of time but subject to different CDSC schedules are
held in the same Exchange Privilege account, the shares of that block that are
subject to a lower CDSC rate will be exchanged prior to the shares of that block
that are subject to a higher CDSC rate). Shares equal to any appreciation in
 
                                       44
<PAGE>
the value of non-Free Shares exchanged will be treated as Free Shares, and the
amount of the purchase payments for the non-Free Shares of the fund exchanged
into will be equal to the lesser of (a) the purchase payments for, or (b) the
current net asset value of, the exchanged non-Free Shares. If an exchange
between funds would result in exchange of only part of a particular block of
non-Free Shares, then shares equal to any appreciation in the value of the block
(up to the amount of the exchange) will be treated as Free Shares and exchanged
first, and the purchase payment for that block will be allocated on a pro rata
basis between the non-Free Shares of that block to be retained and the non-Free
Shares to be exchanged. The prorated amount of such purchase payment
attributable to the retained non-Free Shares will remain as the purchase payment
for such shares, and the amount of purchase payment for the exchanged non-Free
Shares will be equal to the lesser of (a) the prorated amount of the purchase
payment for, or (b) the current net asset value of, those exchanged non-Free
Shares. Based upon the procedures described in the Prospectus under the caption
"Purchase of Fund Shares," any applicable CDSC will be imposed upon the ultimate
redemption of shares of any fund, regardless of the number of exchanges since
those shares were originally purchased.
 
    With respect to the redemption or repurchase of shares of the Fund, the
application of proceeds to the purchase of new shares in the Fund or any other
of the funds and the general administration of the Exchange Privilege, the
Transfer Agent acts as agent for the Distributor and for the shareholder's
selected broker-dealer, if any, in the performance of such functions. With
respect to exchanges, redemptions or repurchases, the Transfer Agent shall be
liable for its own negligence and not for the default or negligence of its
correspondents or for losses in transit. The Fund shall not be liable for any
default or negligence of the Transfer Agent, the Distributor or any selected
broker-dealer.
 
    The Distributor and any selected broker-dealer have authorized and appointed
the Transfer Agent to act as their agent in connection with the application of
proceeds of any redemption of Fund shares to the purchase of shares of any other
fund and the general administration of the Exchange Privilege. No commission or
discounts will be paid to the Distributor or any selected broker-dealer for any
transactions pursuant to this Exchange Privilege.
 
    Exchanges are subject to the minimum investment requirement and any other
conditions imposed by each fund. (The minimum initial investment for the
Exchange Privilege account of each Class is $5,000 for Morgan Stanley Dean
Witter Liquid Asset Fund Inc., Morgan Stanley Dean Witter Tax-Free Daily Income
Trust, Morgan Stanley Dean Witter California Tax-Free Daily Income Trust and
Morgan Stanley Dean Witter New York Municipal Money Market Trust, although those
funds may, at their discretion, accept initial investments of as low as $1,000.
The minimum investment for the Exchange Privilege account of each Class is
$10,000 for Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust, although
that fund, in its discretion, may accept initial purchases as low as $5,000. The
minimum initial investment for the Exchange Privilege account of each Class is
$5,000 for Morgan Stanley Dean Witter Special Value Fund. The minimum initial
investment for the Exchange Privilege account of each Class for all other Morgan
Stanley Dean Witter Funds for which the Exchange Privilege is available is
$1,000.) Upon exchange into an Exchange Fund, the shares of that fund will be
held in a special Exchange Privilege Account separately from accounts of those
shareholders who have acquired their shares directly from that fund. As a
result, certain services normally available to shareholders of those funds,
including the check writing feature, will not be available for funds held in
that account.
 
    The Fund and each of the other Morgan Stanley Dean Witter Funds may limit
the number of times this Exchange Privilege may be exercised by any investor
within a specified period of time. Also, the Exchange Privilege may be
terminated or revised at any time by the Fund and/or any of the Morgan Stanley
Dean Witter Funds for which shares of the Fund have been exchanged, upon such
notice as may be required by applicable regulatory agencies (presently sixty
days' prior written notice for termination or material revision), provided that
six months' prior written notice of termination will be given to the
shareholders who hold shares of Exchange Funds, pursuant to the Exchange
Privilege, and provided further that the Exchange Privilege may be terminated or
materially revised without notice at times (a) when the New York Stock Exchange
is closed for other than customary weekends and holidays, (b) when trading on
that Exchange is restricted, (c) when an emergency exists as a result of which
disposal by the Fund of securities owned by it is not reasonably practicable or
it is not reasonably practicable for the Fund fairly to
 
                                       45
<PAGE>
determine the value of its net assets, (d) during any other period when the
Securities and Exchange Commission by order so permits (provided that applicable
rules and regulations of the Securities and Exchange Commission shall govern as
to whether the conditions prescribed in (b) or (c) exist) or (e) if the Fund
would be unable to invest amounts effectively in accordance with its investment
objective, policies and restrictions.
 
    The current prospectus for each fund describes its investment objective(s)
and policies, and shareholders should obtain a copy and examine it carefully
before investing. An exchange will be treated for federal income tax purposes
the same as a repurchase or redemption of shares, on which the shareholder may
realize a capital gain or loss. However, the ability to deduct capital losses on
an exchange may be limited in situations where there is an exchange of shares
within ninety days after the shares are purchased. The Exchange Privilege is
only available in states where an exchange may legally be made.
 
    For further information regarding the Exchange Privilege, shareholders
should contact their Morgan Stanley Dean Witter Financial Advisor or other
selected broker-dealer representative or the Transfer Agent.
 
REDEMPTIONS AND REPURCHASES
- --------------------------------------------------------------------------------
 
    REDEMPTION.  As stated in the Prospectus, shares of each Class of the Fund
can be redeemed for cash at any time at the net asset value per share next
determined; however, such redemption proceeds will be reduced by the amount of
any applicable CDSC. If shares are held in a shareholder's account without a
share certificate, a written request for redemption to the Fund's Transfer Agent
at P.O. Box 983, Jersey City, NJ 07303 is required. If certificates are held by
the shareholder, the shares may be redeemed by surrendering the certificates
with a written request for redemption. The share certificate, or an accompanying
stock power, and the request for redemption, must be signed by the shareholder
or shareholders exactly as the shares are registered. Each request for
redemption, whether or not accompanied by share certificates, must be sent to
the Fund's Transfer Agent, which will redeem the shares at their net asset value
next computed (see "Purchase of Fund Shares") after it receives the request, and
certificate, if any, in good order. Any redemption request received after such
computation will be redeemed at the next determined net asset value. The term
"good order" means that the share certificate, if any, and request for
redemption are properly signed, accompanied by any documentation required by the
Transfer Agent, and bear signature guarantees when required by the Fund or the
Transfer Agent. If redemption is requested by a corporation, partnership, trust
or fiduciary, the Transfer Agent may require that written evidence of authority
acceptable to the Transfer Agent be submitted before such request is accepted.
 
    Whether certificates are held by the shareholder or shares are held in a
shareholder's account, if the proceeds are to be paid to any person other than
the record owner, or if the proceeds are to be paid to a corporation (other than
the Distributor or a selected broker-dealer for the account of the shareholder),
partnership, trust or fiduciary, or sent to the shareholder at an address other
than the registered address, signatures must be guaranteed by an eligible
guarantor. A stock power may be obtained from any dealer or commercial bank. The
Fund may change the signature guarantee requirements from time to time upon
notice to shareholders, which may be a means of a new prospectus.
 
    REPURCHASE.  As stated in the Prospectus, DWR and other selected
broker-dealers are authorized to repurchase shares represented by a share
certificate which is delivered to any of their offices. Shares held in a
shareholder's account without a share certificate may also be repurchased by DWR
and other selected broker-dealers upon the telephonic request of the
shareholder. The repurchase price is the net asset value next computed after
such purchase order is received by DWR or other selected broker-dealer reduced
by any applicable CDSC.
 
    PAYMENT FOR SHARES REDEEMED OR REPURCHASED.  As discussed in the Prospectus,
payment for shares of any Class presented for repurchase or redemption will be
made by check within seven days after receipt by the Transfer Agent of the
certificate and/or written request in good order. Such payment
 
                                       46
<PAGE>
may be postponed or the right of redemption suspended at times (a) when the New
York Stock Exchange is closed for other than customary weekends and holidays,
(b) when trading on that Exchange is restricted, (c) when an emergency exists as
a result of which disposal by the Fund of securities owned by it is not
reasonably practicable or it is not reasonably practicable for the Fund fairly
to determine the value of its net assets, or (d) during any period when the
Securities and Exchange Commission by order so permits; provided that applicable
rules and regulations of the Securities and Exchange Commission shall govern as
to whether the conditions prescribed in (b) or (c) exist. If the shares to be
redeemed have recently been purchased by check, payment of the redemption
proceeds may be delayed for the minimum time needed to verify that the check
used for investment has been honored (not more than fifteen days from the time
of receipt of the check by the Transfer Agent). It has been and remains the
Fund's policy and practice that, if checks for redemption proceeds remain
uncashed, no interest will accrue on amounts represented by such uncashed
checks. Shareholders maintaining margin accounts with DWR or another selected
broker-dealer are referred to their Morgan Stanley Dean Witter Financial Advisor
or other selected broker-dealer representative regarding restrictions on
redemption of shares of the Fund pledged in the margin account.
 
    TRANSFERS OF SHARES.  In the event a shareholder requests a transfer of any
shares to a new registration, such shares will be transferred without sales
charge at the time of transfer. With regard to the status of shares which are
either subject to the CDSC or free of such charge (and with regard to the length
of time shares subject to the charge have been held), any transfer involving
less than all of the shares in an account will be made on a pro rata basis (that
is, by transferring shares in the same proportion that the transferred shares
bear to the total shares in the account immediately prior to the transfer). The
transferred shares will continue to be subject to any applicable CDSC as if they
had not been so transferred.
 
    REINSTATEMENT PRIVILEGE.  As discussed in the Prospectus, a shareholder who
has had his or her shares redeemed or repurchased and has not previously
exercised this reinstatement privilege may, within 35 days after the redemption
or repurchase, reinstate any portion or all of the proceeds of such redemption
or repurchase in shares of the Fund in the same Class held by the shareholder at
the net asset value next determined after a reinstatement request, together with
the proceeds, is received by the Transfer Agent.
 
    Exercise of the reinstatement privilege will not affect the federal income
tax and state income tax treatment of any gain or loss realized upon the
redemption or repurchase, except that if the redemption or repurchase resulted
in a loss and reinstatement is made in shares of the Fund, some or all of the
loss, depending on the amount reinstated, will not be allowed as a deduction for
federal income tax and state personal income tax purposes but will be applied to
adjust the cost basis of the shares acquired upon reinstatement.
 
DIVIDENDS, DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus, the Fund will determine either to distribute
or to retain all or part of any net long-term capital gains in any year for
reinvestment. If any such gains are retained, the Fund will pay federal income
tax thereon, and, if the Fund makes an election, the shareholders would include
such undistributed gains in their income and shareholders will be able to claim
their share of the tax paid by the Fund as a credit against their individual
federal income tax.
 
    Any dividends declared in the last quarter of any calendar year which are
paid in the following year prior to February 1 will be deemed received by the
shareholder in the prior year.
 
    Gains or losses on sales of securities by the Fund will generally be
long-term capital gains or losses if the securities have been held by the Fund
for more than twelve months. Gains or losses on the sale of securities held for
twelve months or less will be generally short-term capital gains or losses.
 
    Distributions of net long-term capital gains, if any, are taxable to
shareholders as long-term capital gains regardless of how long a shareholder has
held the Fund's shares and regardless of whether the distribution is received in
additional shares or in cash. Capital gains distributions are not eligible for
the
 
                                       47
<PAGE>
dividends received deduction. The Treasury intends to issue regulations to
permit shareholders to take into account their proportionate share of the Fund's
capital gains distributions that will be subject to a reduced rate under the
Taxpayer Relief Act of 1997. The Taxpayer Relief Act reduces the maximum tax
rate on long-term capital gains from 28% to 20%. It also lengthens the required
holding period to obtain the lower rate from more than twelve months to more
than eighteen months. However, the IRS Restructuring and Reform Act of 1998
reduces the holding period requirement for the lower capital gain rate to more
than twelve months for transactions occurring after January 1, 1998. The lower
rates do not apply to collectibles and certain other assets. Additionally, the
maximum capital gain rate for assets that are held more than five years and that
are acquired after December 31, 2000 is 18%.
 
    The Fund intends to remain qualified as a regulated investment company under
Subchapter M of the Internal Revenue Code of 1986. As such, the Fund will not be
subject to federal income tax on its net investment income and capital gains, if
any, realized during any fiscal year in which it distributes such income and
capital gains to its shareholders. In addition, the Fund intends to distribute
to its shareholders each calendar year a sufficient amount of ordinary income
and capital gains to avoid the imposition of a 4% excise tax. Shareholders will
normally have to pay federal income taxes, and any state and/or local income
taxes, on the dividends and distributions they receive from the Fund. Such
dividends and distributions, to the extent that they are derived from net
investment income or short-term capital gains, are taxable to the shareholder as
ordinary income regardless of whether the shareholder receives such payments in
additional shares or in cash. Any dividends declared in the last quarter of any
calendar year which are paid in the following year prior to February 1 will be
deemed received by the shareholder in the prior year.
 
    After the end of the calendar year, shareholders will be sent full
information on their dividends and capital gains distributions for tax purposes,
including information as to the portion taxable as ordinary income, the portion
taxable as long-term capital gains (including gains taxed at a reduced rate
under the Taxpayer Relief Act of 1997), and the amount of dividends eligible for
the Federal dividends received deduction available to corporations. To avoid
being subject to a 31% Federal backup withholding tax on taxable dividends,
capital gains distributions and the proceeds of redemptions and repurchases,
shareholders' taxpayer identification numbers must be furnished and certified as
to their accuracy.
 
    Any dividend or capital gains distribution received by a shareholder from
any investment company will have the effect of reducing the net asset value of
the shareholder's stock in that company by the exact amount of the dividend or
capital gains distribution. Furthermore, capital gains distributions and
dividends are subject to federal income taxes. If the net asset value of the
shares should be reduced below a shareholder's cost as a result of the payment
of dividends or the distribution of realized net long-term capital gains, such
payment or distribution would be in part a return of the shareholder's
investment to the extent of such reduction below the shareholder's cost, but
nonetheless would be fully taxable. Therefore, an investor should consider the
tax implications of purchasing Fund shares immediately prior to a distribution
record date.
 
    Any loss realized by shareholders upon a redemption of shares within six
months of the date of their purchase will be treated as a long-term capital loss
to the extent of any distributions of net long-term capital gains during the
six-month period.
 
    Dividend payments will be eligible for the federal dividends received
deduction available to the Fund's corporate shareholders only to the extent the
aggregate dividends received by the Fund would be eligible for the deduction if
the Fund were the shareholder claiming the dividends received deduction. The
amount of dividends paid by the Fund which may qualify for the dividends
received deduction is limited to the aggregate amount of qualifying dividends
which the Fund derives from its portfolio investments which the Fund has held
for a minimum period, usually 46 days within a 90-day period beginning 45 days
before the ex-dividend date of each qualifying dividend. Shareholders must meet
a similar holding period requirement with respect to their shares to claim the
dividends received deduction with respect to any distribution of qualifying
dividends. Any long-term capital gain distributions will also not be eligible
for the dividends received deduction. The ability to take the dividends received
deduction will also be limited in the case of a Fund shareholder which incurs or
continues indebtedness which is directly attributable to its investment in the
Fund.
 
                                       48
<PAGE>
    The Fund may elect to retain net capital gains and pay corporate income tax
thereon. In such event, each shareholder of record on the last day of the Fund's
taxable year would be required to include in income for tax purposes such
shareholder's proportionate share of the Fund's undistributed net capital gain.
In addition, each shareholder would be entitled to credit such shareholder's
proportionate share of the tax paid by the Fund against federal income tax
liabilities, to claim refunds to the extent that the credit exceeds such
liabilities, and to increase the basis of his shares held for federal income tax
purposes by an amount equal to 65% of such shareholder's proportionate share of
the undistributed net capital gain.
 
    Dividend payments will be eligible for the federal dividends received
deduction available to the Fund's corporate shareholders only to the extent the
aggregate dividends received by the Fund would be eligible for the deduction if
the Fund were the shareholder claiming the dividends received deduction. The
amount of dividends paid by the Fund which may qualify for the dividends
received deduction is limited to the aggregate amount of qualifying dividends
which the Fund derives from its portfolio investments which the Fund has held
for a minimum period, usually 46 days within a 90-day period beginning 45 days
before the ex-dividend date of each qualifying dividend. Shareholders must meet
a similar holding period requirement with respect to the their shares to claim
the dividends received deduction with respect to any distribution of qualifying
dividends. Any long-term capital gain distributions will also not be eligible
for the dividends received deduction. The ability to take the dividends received
deduction will also be limited in the case of a Fund shareholder which incurs or
continues indebtedness which is directly attributable to its investment in the
Fund.
 
    Dividends, interest and capital gains received by the Fund may give rise to
withholding and other taxes imposed by foreign countries. Tax conventions
between certain countries and the United States may reduce or eliminate such
taxes. Investors may be entitled to claim United States foreign tax credits or
deductions with respect to such taxes, subject to certain provisions and
limitations contained in the Code. If more than 50% of the Fund's total assets
at the close of its fiscal year consist of securities of foreign corporations,
the Fund would be eligible and would determine whether or not to file an
election with the Internal Revenue Service pursuant to which shareholders of the
Fund will be required to include their respective pro rata portions of such
withholding taxes in their United States income tax returns as gross income,
treat such respective pro rata portions as taxes paid by them, and deduct such
respective pro rata portions in computing their taxable income or,
alternatively, use them as foreign tax credits against their United States
income taxes. If the Fund does elect to file the election with the Internal
Revenue Service, the Fund will report annually to its shareholders the amount
per share of such withholding.
 
    SPECIAL RULES FOR CERTAIN FOREIGN CURRENCY TRANSACTIONS.  In general, gains
from foreign currencies and from foreign currency options, foreign currency
futures and forward foreign exchange contracts relating to investments in stock,
securities or foreign currencies are currently considered to be qualifying
income for purposes of determining whether the Fund qualifies as a regulated
investment company. It is currently unclear, however, who will be treated as the
issuer of certain foreign currency instruments or how foreign currency options,
futures, or forward foreign currency contracts will be valued for purposes of
the regulated investment company diversification requirements applicable to the
Fund. The Fund may request a private letter ruling from the Internal Revenue
Service on some or all of these issues.
 
    Under Code Section 988, special rules are provided for certain transactions
in a foreign currency other than the taxpayer's functional currency (I.E.,
unless certain special rules apply, currencies other than the U.S. dollar). In
general, foreign currency gains or losses from forward contracts, from futures
contracts that are not "regulated futures contracts", and from unlisted options
will be treated as ordinary income or loss under Code Section 988. Also, certain
foreign exchange gains or losses derived with respect to foreign fixed-income
securities are also subject to Section 988 treatment. In general, therefore,
Code Section 988 gains or losses will increase or decrease the amount of the
Fund's investment company taxable income available to be distributed to
shareholders as ordinary income, rather than increasing or decreasing the amount
of the Fund's net capital gain. Additionally, if Code Section 988 losses exceed
other investment company taxable income during a taxable year, the Fund would
not be able to make any ordinary dividend distributions.
 
                                       49
<PAGE>
    If the Fund invests in an entity which is classified as a "passive foreign
investment company" ("PFIC") for U.S. tax purposes, the application of certain
technical tax provisions applying to such companies could result in the
imposition of federal income tax with respect to such investments at the Fund
level which could not be eliminated by distributions to shareholders. The U.S.
Treasury issued proposed regulation section 1.1291- 8 which establishes a
mark-to-market regime which allows investment companies investing in PFIC's to
avoid most, if not all, of the difficulties posed by the PFIC rules. In any
event, it is not anticipated that any taxes on the Fund with respect to
investments in PFIC's would be significant.
 
    Shareholders are urged to consult their attorneys or tax advisers regarding
specific questions as to federal, state or local taxes.
 
PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus, from time to time the Fund may quote its
"total return" in advertisements and sales literature. These figures are
computed for Class A, Class B, Class C and Class D shares. The Fund's "average
annual total return" represents an annualization of the Fund's total return over
a particular period and is computed by finding the annual percentage rate which
will result in the ending redeemable value of a hypothetical $1,000 investment
made at the beginning of a one, five or ten year period, or for the period from
the date of commencement of the Fund's operations, if shorter than any of the
foregoing. The ending redeemable value is reduced by any CDSC at the end of the
one, five or ten year or other period. For the purpose of this calculation, it
is assumed that all dividends and distributions are reinvested. The formula for
computing the average annual total return involves a percentage obtained by
dividing the ending redeemable value by the amount of the initial investment,
taking a root of the quotient (where the root is equivalent to the number of
years in the period) and subtracting 1 from the result. The average annual total
returns of Class B for the fiscal year ended May 31, 1998 and for the period
July 29, 1994 (commencement of operations) through May 31, 1998 were -6.28% and
- -2.71%, respectively.
 
    For periods of less than one year, the Fund quotes its total return on a
non-annualized basis. Accordingly, the Fund may compute its aggregate total
return for each of Class A, Class C and Class D for specified periods by
determining the aggregate percentage rate which will result in the ending value
of a hypothetical $1,000 investment made at the beginning of the period. For the
purpose of this calculation, it is assumed that all dividends and distributions
are reinvested. The formula for computing aggregate total return involves a
percentage obtained by dividing the ending value by the initial $1,000
investment and subtracting 1 from the result. The ending redeemable value is
reduced by any CDSC at the end of the period. Based on the foregoing
calculations, the total returns for the period July 28, 1997 through May 31,
1998 were -6.41%, -2.77% and -1.00% for Class A, Class C and Class D,
respectively.
 
    In addition to the foregoing, the Fund may advertise its total return for
each Class over different periods of time by means of aggregate, average,
year-by-year or other types of total return figures. Such calculations may or
may not reflect the imposition of the maximum front-end sales charge for Class A
or the deduction of the CDSC for each of Class B and Class C which, if
reflected, would reduce the performance quoted. For example, the average annual
total returns of the Fund may be calculated in the manner described above, but
without deduction for any applicable sales charge. Based upon this calculation,
the average annual total returns of Class B for the fiscal year ended May 31,
1998 and the period July 29, 1994 (commencement of operations) through May 31,
1998 were -1.35% and -2.21%, respectively.
 
    In addition, the Fund may compute its aggregate total return for each Class
for specified periods by determining the aggregate percentage rate which will
result in the ending value of a hypothetical $1,000 investment made at the
beginning of the period. For the purpose of this calculation, it is assumed that
all dividends and distributions are reinvested. The formula for computing
aggregate total return involves a percentage obtained by dividing the ending
value (without reduction for any sales charge) by the initial
 
                                       50
<PAGE>
$1,000 investment and subtracting 1 from the result. Based on the foregoing
calculation, the total returns for Class B for the year ended May 31, 1998 and
the period July 29, 1994 (commencement of operations) through May 31, 1998 were
- -1.35% and -8.23%, respectively. Based on the foregoing calculations, the total
returns for Class A, Class C and Class D for the period July 28, 1997 through
May 31, 1998 were -1.23%, -1.79% and -1.00%, respectively.
 
    The Fund may also advertise the growth of hypothetical investments of
$10,000, $50,000 and $100,000 in each Class of shares of the Fund by adding 1 to
the Fund's total aggregate total return to date (expressed as a decimal and
without taking into account the effect of applicable CDSC) and multiplying by
$9,475, $48,000 and $97,000 in the case of Class A (investments of $10,000,
$50,000 and $100,000 adjusted for the initial sales charge) or by $10,000,
$50,000 and $100,000 in the case of each Class B, Class C and Class D, as the
case may be. Investments of $10,000, $50,000 and $100,000 in each Class at
inception of the Class would have grown to the following amounts at May 31,
1998:
 
<TABLE>
<CAPTION>
                                      INVESTMENT AT INCEPTION OF:
                             ----------------------------------------------
  CLASS     INCEPTION DATE:     $10,000         $50,000         $100,000
- ----------  ---------------  --------------  --------------  --------------
<S>         <C>              <C>             <C>             <C>
Class A          7/28/97     $        9,359  $       47,410  $       95,807
Class B          7/29/94              9,177          45,885          91,770
Class C          7/28/97              9,821          49,105          98,210
Class D          7/28/97              9,900          49,500          99,000
</TABLE>
 
The Fund from time to time may also advertise its performance relative to
certain performance rankings and indexes compiled by independent organizations.
 
DESCRIPTION OF SHARES
- --------------------------------------------------------------------------------
 
    The shareholders of the Fund are entitled to a full vote for each full share
of beneficial interest held. All of the Trustees have been elected by the
shareholders of the Fund, most recently at a Special Meeting of Shareholders
held on May 21 1997. The Trustees themselves have the power to alter the number
and the terms of office of the Trustees, and they may at any time lengthen their
own terms or make their terms of unlimited duration and appoint their own
successors, provided that always at least a majority of the Trustees has been
elected by the shareholders of the Fund. Under certain circumstances the
Trustees may be removed by action of the Trustees. The shareholders then also
have the right to remove the Trustees following a meeting called for that
purpose requested in writing by the record holders of not less than ten percent
of the Fund's outstanding shares. The voting rights of shareholders are not
cumulative, so that holders of more than 50 percent of the shares voting can, if
they choose, elect all Trustees being selected, while the holders of the
remaining shares would be unable to elect any Trustees.
 
    The Declaration of Trust permits the Trustees to authorize the creation of
additional series of shares (the proceeds of which would be invested in
separate, independently managed portfolios) and additional classes of shares
within any series. The Trustees have not authorized any such additional series
or classes of shares other than as set forth in the Prospectus.
 
    The Declaration of Trust provides that no Trustee, officer, employee or
agent of the Fund is liable to the Fund or to a shareholder, nor is any Trustee,
officer, employee or agent liable to any third persons in connection with the
affairs of the Fund, except as such liability may arise from his or her own bad
faith, willful misfeasance, gross negligence, or reckless disregard of his or
her duties. It also provides that all third persons shall look solely to the
Fund's property for satisfaction of claims arising in connection with the
affairs of the Fund. With the exceptions stated, the Declaration of Trust
provides that a Trustee, officer, employee or agent is entitled to be
indemnified against all liabilities in connection with the affairs of the Fund.
 
    The Fund is authorized to issue an unlimited number of shares of beneficial
interest. The Fund shall be of unlimited duration subject to the provisions in
the Declaration of Trust concerning termination by action of the shareholders.
 
                                       51
<PAGE>
CUSTODIAN AND TRANSFER AGENT
- --------------------------------------------------------------------------------
 
    The Chase Manhattan Bank, One Chase Plaza, New York, New York 10005, is the
Custodian of the Fund's assets. The Custodian has contracted with various
foreign banks and depositaries to hold portfolio securities of non-U.S. issuers
on behalf of the Fund. Any of the Fund's cash balances with the Custodian in
excess of $100,000 are unprotected by federal deposit insurance. Such balances
may, at times, be substantial.
 
    Morgan Stanley Dean Witter Trust FSB ("MSDW Trust"), Harborside Financial
Center, Plaza Two, Jersey City, New Jersey 07311 is the Transfer Agent of the
Fund's shares and Dividend Disbursing Agent for payment of dividends and
distributions on Fund shares and Agent for shareholders under various investment
plans described herein. MSDW Trust is an affiliate of Morgan Stanley Dean Witter
Advisors Inc., the Fund's Investment Manager, and of Morgan Stanley Dean Witter
Distributors Inc., the Fund's Distributor. As Transfer Agent and Dividend
Disbursing Agent, MSDW Trust's responsibilities include maintaining shareholder
accounts, disbursing cash dividends and reinvesting dividends, processing
account registration changes, handling purchase and redemption transactions,
mailing prospectuses and reports, mailing and tabulating proxies, processing
share certificate transactions, and maintaining shareholder records and lists.
For these services MSDW Trust receives a per shareholder account fee.
 
INDEPENDENT ACCOUNTANTS
- --------------------------------------------------------------------------------
 
    PricewaterhouseCoopers LLP serves as the independent accountants of the
Fund. The independent accountants are responsible for auditing the annual
financial statements of the Fund.
 
REPORTS TO SHAREHOLDERS
- --------------------------------------------------------------------------------
 
    The Fund will send to shareholders, at least semi-annually, reports showing
the Fund's portfolio and other information. An annual report containing
financial statements audited by independent accountants will be sent to
shareholders each year.
 
    The Fund's fiscal year ends on May 31. The financial statements of the Fund
must be audited at least once a year by independent accountants whose selection
is made annually by the Fund's Board of Trustees.
 
LEGAL COUNSEL
- --------------------------------------------------------------------------------
 
    Barry Fink, Esq., who is an officer and the General Counsel of the
Investment Manager, is an officer and the General Counsel of the Fund.
 
EXPERTS
- --------------------------------------------------------------------------------
 
    The financial statements of the Fund included in this Statement of
Additional Information and incorporated by reference in the Prospectus have been
so included and incorporated in reliance on the report of PricewaterhouseCoopers
LLP, independent accountants, given on the authority of said firm as experts in
auditing and accounting.
 
REGISTRATION STATEMENT
- --------------------------------------------------------------------------------
 
    This Statement of Additional Information and the Prospectus do not contain
all of the information set forth in the Registration Statement the Fund has
filed with the Securities and Exchange Commission. The complete Registration
Statement may be obtained from the Securities and Exchange Commission upon
payment of the fee prescribed by the rules and regulations of the Commission.
 
                                       52
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
PORTFOLIO OF INVESTMENTS MAY 31, 1998
<TABLE>
<CAPTION>
       NUMBER OF
         SHARES                                                                                    VALUE
- ----------------------------------------------------------------------------------------------------------------
<C>                       <S>                                                               <C>
                          COMMON AND PREFERRED STOCKS, RIGHTS AND WARRANTS (94.4%)
                          AUSTRALIA (5.1%)
                          DIVERSIFIED MANUFACTURING
                250,530   Futuris Corporation Ltd. .......................................  $            233,932
                                                                                            --------------------
                          ELECTRONICS
              1,567,400   E.R.G. Ltd.*....................................................             1,151,334
                                                                                            --------------------
                          ENTERTAINMENT/GAMING & LODGING
                460,900   Star City Holdings Ltd. ........................................               292,649
                                                                                            --------------------
                          HOME BUILDING
              1,127,214   Parbury Ltd. ...................................................               259,626
                                                                                            --------------------
                          MEDICAL SERVICES
                579,200   Australian Hospital Care Ltd. ..................................               530,011
                                                                                            --------------------
                          METALS & MINING
                347,400   Eltin Ltd.......................................................               330,872
                                                                                            --------------------
                          RETAIL - DEPARTMENT STORES
                668,200   David Jones Ltd.................................................               811,111
                                                                                            --------------------
 
                          TOTAL AUSTRALIA.................................................             3,609,535
                                                                                            --------------------
 
                          CHINA (0.1%)
                          ELECTRIC
                152,000   Beijing Datang Power Generation Co., Ltd.*......................                53,453
                                                                                            --------------------
 
                          DENMARK (1.4%)
                          BANKING
                 17,800   Sydbank A/S.....................................................             1,007,498
                                                                                            --------------------
 
                          FINLAND (6.2%)
                          MACHINERY
                 20,000   KCI Konecranes International PLC................................             1,028,496
                  6,700   Kone Corp. (B Shares)...........................................               975,596
                 44,900   Rauma Group.....................................................               926,899
                                                                                            --------------------
                                                                                                       2,930,991
                                                                                            --------------------
                          MANUFACTURING
                 43,300   Rautaruukki OY..................................................               360,740
                                                                                            --------------------
                          PAPER
                 63,000   Metsa Tissue Corp. .............................................               708,335
                                                                                            --------------------
                          PHARMACEUTICALS
                 56,100   Tamro OYJ.......................................................               387,760
                                                                                            --------------------
                          TOTAL FINLAND...................................................             4,387,826
                                                                                            --------------------
 
<CAPTION>
       NUMBER OF
         SHARES                                                                                    VALUE
- ----------------------------------------------------------------------------------------------------------------
<C>                       <S>                                                               <C>
 
                          FRANCE (6.8%)
                          ADVERTISING
                  2,209   Havas Advertising S.A. .........................................  $            466,734
                  2,209   Havas Advertising S.A. (Warrants due 05/14/01)*.................                 1,199
                                                                                            --------------------
                                                                                                         467,933
                                                                                            --------------------
                          BUILDING & CONSTRUCTION
                  2,140   Colas S.A. .....................................................               416,412
                 24,076   Groupe Legris Industries S.A....................................             1,346,738
                                                                                            --------------------
                                                                                                       1,763,150
                                                                                            --------------------
                          MULTI-INDUSTRY
                  2,650   Chargeurs S.A. .................................................               219,229
                                                                                            --------------------
                          OIL RELATED
                  2,594   Compagnie Generale de Geophysique S.A...........................               434,998
                                                                                            --------------------
                          TELEVISION
                  6,700   Societe Television Francaise 1..................................               944,497
                                                                                            --------------------
                          TRANSPORTATION - MISCELLANEOUS
                 14,000   De Dietrich et Compagnie S.A....................................             1,017,187
                                                                                            --------------------
 
                          TOTAL FRANCE....................................................             4,846,994
                                                                                            --------------------
 
                          GERMANY (6.8%)
                          BUILDING MATERIALS
                  1,800   Dyckerhoff AG (Pref.)...........................................               746,010
                  2,290   Plettac AG......................................................               337,312
                  1,500   Sto AG (Pref.)..................................................               579,670
                                                                                            --------------------
                                                                                                       1,662,992
                                                                                            --------------------
                          ENGINEERING
                  3,160   Philipp Holzmann AG.............................................               872,517
                                                                                            --------------------
                          MACHINERY
                  1,700   KSB AG*.........................................................               502,716
                                                                                            --------------------
                          RETAIL
                  7,800   Hornbach Holding AG (Pref.).....................................               777,597
                                                                                            --------------------
                          RETAIL - SPECIALTY
                 24,600   Moebel Walther AG (Pref.).......................................             1,047,102
                                                                                            --------------------
 
                          TOTAL GERMANY...................................................             4,862,924
                                                                                            --------------------
 
                          HONG KONG (1.9%)
                          DISTRIBUTION
                478,000   Goldlion Holdings Ltd...........................................               104,868
                                                                                            --------------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       53
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
PORTFOLIO OF INVESTMENTS MAY 31, 1998, CONTINUED
<TABLE>
<CAPTION>
       NUMBER OF
         SHARES                                                                                    VALUE
- ----------------------------------------------------------------------------------------------------------------
<C>                       <S>                                                               <C>
                          ELECTRICAL EQUIPMENT
                108,000   VTech Holdings Ltd.*............................................  $            350,532
                                                                                            --------------------
                          ELECTRONIC COMPONENTS
                140,000   Varitronix International Ltd. ..................................               293,594
                                                                                            --------------------
                          FOOD WHOLESALERS
                240,000   NG Fung Hong Ltd................................................               204,419
                                                                                            --------------------
                          MEDICAL EQUIPMENT
              2,706,000   Quality Healthcare Asia Ltd.*...................................               240,958
                                                                                            --------------------
                          RETAIL - FOOD CHAINS
                200,000   Cafe De Coral Holdings Ltd.*....................................                61,945
                                                                                            --------------------
                          RETAIL - SPECIALTY APPAREL
                354,000   Esprit Holdings Ltd.............................................               138,195
                                                                                            --------------------
 
                          TOTAL HONG KONG.................................................             1,394,511
                                                                                            --------------------
                          IRELAND (2.0%)
                          BANKING
                525,300   Anglo Irish Bank Corp. PLC......................................             1,439,364
                                                                                            --------------------
 
                          ITALY (1.9%)
                          AUTO TRUCKS & PARTS
                210,214   Magneti Marelli SPA.............................................               534,560
                115,400   Sogefi SPA......................................................               426,246
                                                                                            --------------------
                                                                                                         960,806
                                                                                            --------------------
                          MULTI-LINE INSURANCE
                 19,000   Toro Assicurazioni SPA*.........................................               367,631
                                                                                            --------------------
 
                          TOTAL ITALY.....................................................             1,328,437
                                                                                            --------------------
                          JAPAN (19.0%)
                          APPAREL
                  5,300   Nagaileben Co., Ltd.*...........................................                95,427
                                                                                            --------------------
                          AUTO TRUCKS & PARTS
                 32,000   NGK Spark Plug Co., Ltd.........................................               253,742
                                                                                            --------------------
                          BEVERAGES
                 13,000   Itoen, Ltd. ....................................................               400,720
                                                                                            --------------------
                          BUSINESS SERVICES
                  9,000   Nichii Gakkan Co................................................               298,164
                                                                                            --------------------
                          CHEMICALS - DIVERSIFIED
                  7,000   C. Uyemura & Co., Ltd...........................................               201,152
                 30,000   Nippon Soda Co., Ltd. ..........................................               178,682
                                                                                            --------------------
                                                                                                         379,834
                                                                                            --------------------
 
<CAPTION>
       NUMBER OF
         SHARES                                                                                    VALUE
- ----------------------------------------------------------------------------------------------------------------
<C>                       <S>                                                               <C>
                          CHEMICALS - SPECIALTY
                  6,000   T&K TOKA Co., Ltd. .............................................  $            116,673
                                                                                            --------------------
                          COMMERCIAL SERVICES
                  2,500   Bellsystem 24, Inc..............................................               331,293
                                                                                            --------------------
                          COMMUNICATIONS EQUIPMENT
                 17,000   Sony Chemicals Corp. ...........................................               342,816
                                                                                            --------------------
                          COMPUTER SOFTWARE
                  9,200   Fuji Soft ABC Inc. .............................................               321,354
                                                                                            --------------------
                          COMPUTERS
                 10,300   Meitec Corp.....................................................               350,875
                                                                                            --------------------
                          ELECTRIC
                 28,000   Ushio Inc. .....................................................               233,922
                                                                                            --------------------
                          ELECTRONIC COMPONENTS
                 17,000   Hosiden Corp.*..................................................               206,302
                  8,800   Kyoden Co., Ltd.................................................               205,344
                 13,000   Tokyo Seimitsu Co., Ltd.........................................               332,373
                                                                                            --------------------
                                                                                                         744,019
                                                                                            --------------------
                          ELECTRONICS
                 17,000   Aiwa Co., Ltd...................................................               511,775
                  9,000   Nidec Corp......................................................               508,823
                 12,800   Nitto Kohki Co., Ltd............................................               140,583
                                                                                            --------------------
                                                                                                       1,161,181
                                                                                            --------------------
                          FINANCE
                 13,600   Aeon Credit Service Co., Ltd....................................               570,054
                                                                                            --------------------
                          FOOD SERVICES
                 12,000   Ariake Japan Co., Ltd. .........................................               267,915
                                                                                            --------------------
                          FOOD WHOLESALERS
                 13,900   Doutor Coffee Co., Ltd..........................................               385,416
                 23,000   Rock Field Co., Ltd.............................................               311,415
                                                                                            --------------------
                                                                                                         696,831
                                                                                            --------------------
                          HAND TOOLS
                 14,000   Disco Corp......................................................               369,031
                                                                                            --------------------
                          HEALTH & PERSONAL CARE
                 12,300   Aderans Co., Ltd................................................               299,417
                                                                                            --------------------
                          HOME BUILDING
                    500   Higashi Nihon House Co. ........................................                 2,229
                                                                                            --------------------
                          LEISURE TIME
                  5,000   H.I.S. Co., Ltd. ...............................................                79,222
                                                                                            --------------------
                          MACHINERY
                 14,300   Misumi Corp. ...................................................               263,651
                 17,500   Sato Corp. .....................................................               286,730
                 11,200   Union Tool Co. .................................................               395,247
                                                                                            --------------------
                                                                                                         945,628
                                                                                            --------------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       54
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
PORTFOLIO OF INVESTMENTS MAY 31, 1998, CONTINUED
<TABLE>
<CAPTION>
       NUMBER OF
         SHARES                                                                                    VALUE
- ----------------------------------------------------------------------------------------------------------------
<C>                       <S>                                                               <C>
                          MACHINERY & MACHINE TOOLS
                 15,000   Fuji Machine Manufacturing Co., Ltd.............................  $            394,310
                                                                                            --------------------
                          MANUFACTURING
                 15,000   Japan Cash Machine Co., Ltd.....................................               210,659
                                                                                            --------------------
                          MEDICAL EQUIPMENT
                 15,000   Kawasumi Laboratories, Inc......................................               219,301
                                                                                            --------------------
                          METALS - MISCELLANEOUS
                 21,000   Sumitomo Special Metals Co......................................               453,727
                                                                                            --------------------
                          MISCELLANEOUS MATERIALS & COMMODITIES
                  7,360   Fujimi Inc......................................................               280,936
                                                                                            --------------------
                          REAL ESTATE
                    700   Chubu Sekiwa Real Estate, Ltd...................................                 3,504
                                                                                            --------------------
                          RESTAURANTS
                 11,000   Denny's Japan Co., Ltd..........................................               276,485
                 19,000   Saint Marc Co., Ltd.............................................               617,141
                 19,000   Watami Food Service Co., Ltd....................................               355,780
                                                                                            --------------------
                                                                                                       1,249,406
                                                                                            --------------------
                          RETAIL
                  8,100   Ministop Co., Ltd...............................................               157,216
                  5,000   Otsuka Kagu Ltd.................................................               241,628
                                                                                            --------------------
                                                                                                         398,844
                                                                                            --------------------
                          RETAIL - GENERAL MERCHANDISE
                 16,420   Circle K Japan Co., Ltd.........................................               601,929
                 10,200   Ryohin Keikaku Co., Ltd. .......................................               910,911
                                                                                            --------------------
                                                                                                       1,512,840
                                                                                            --------------------
                          RETAIL STORES
                 11,600   Matsumotokiyoshi Co.............................................               398,502
                                                                                            --------------------
                          TEXTILES - APPAREL
                  6,100   Shimamura Co., Ltd. ............................................               156,838
                                                                                            --------------------
                          TOTAL JAPAN.....................................................            13,539,214
                                                                                            --------------------
                          MALAYSIA (2.1%)
                          ADVERTISING
                123,000   Seni Jaya Corp. Berhad*.........................................                45,799
                                                                                            --------------------
                          AGRICULTURE
                231,000   Austral Enterprises Berhad......................................               240,594
                                                                                            --------------------
                          AUTOMOTIVE
                 25,000   AIC Corp. Berhad................................................                55,657
                  6,250   AIC Corp. Berhad (Rights)*......................................                 5,777
                  9,375   AIC Corp. Berhad (Warrants due 06/16/98)*.......................                16,721
 
<CAPTION>
       NUMBER OF
         SHARES                                                                                    VALUE
- ----------------------------------------------------------------------------------------------------------------
<C>                       <S>                                                               <C>
                 36,000   Oriental Holdings Berhad........................................  $             62,336
                332,000   Tan Chong Motor Holdings Berhad.................................                85,583
                                                                                            --------------------
                                                                                                         226,074
                                                                                            --------------------
                          BREWERY
                221,000   Hap Seng Consolidated Berhad....................................               258,951
                                                                                            --------------------
                          CONSUMER PRODUCTS
                 72,000   Amway (Malaysia) Holdings Berhad................................               148,106
                                                                                            --------------------
                          ELECTRIC
                151,000   Powertek Berhad.................................................               180,075
                                                                                            --------------------
                          FOOD WHOLESALERS
                106,000   Yeo Hiap Seng (Malaysia) Berhad.................................                60,169
                                                                                            --------------------
                          FOODS & BEVERAGES
                  9,800   Carlsberg Brewery (Malaysia) Berhad.............................                31,897
                                                                                            --------------------
                          LEISURE
                115,000   Tanjong PLC.....................................................               190,144
                                                                                            --------------------
                          MISCELLANEOUS
                996,000   Tan Chong International Ltd. ...................................                92,779
                                                                                            --------------------
 
                          TOTAL MALAYSIA..................................................             1,474,588
                                                                                            --------------------
 
                          NETHERLANDS (7.4%)
                          BUILDING & CONSTRUCTION
                 16,900   Hollandsche Beton Groep NV......................................               357,716
                                                                                            --------------------
                          DIVERSIFIED MANUFACTURING
                 16,700   GTI Holding NV..................................................               659,669
                                                                                            --------------------
                          ENGINEERING
                 10,400   Internatio-Muller NV............................................               374,640
                                                                                            --------------------
                          FOODS
                 17,500   Nutreco Holding NV..............................................               617,361
                                                                                            --------------------
                          HOUSEHOLD FURNISHINGS & APPLIANCES
                 10,500   Koninklijke Ahrend Groep NV.....................................               337,027
                                                                                            --------------------
                          OFFICE EQUIPMENT
                  8,125   Samas Groep NV..................................................               603,541
                                                                                            --------------------
                          PHARMACEUTICALS
                 23,050   Apothekers Cooperatie OPG NV....................................               790,247
                                                                                            --------------------
                          PUBLISHING
                 18,200   Holdingmaatschappij De Telegraaf NV.............................               425,022
                                                                                            --------------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       55
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
PORTFOLIO OF INVESTMENTS MAY 31, 1998, CONTINUED
<TABLE>
<CAPTION>
       NUMBER OF
         SHARES                                                                                    VALUE
- ----------------------------------------------------------------------------------------------------------------
<C>                       <S>                                                               <C>
                          SOAP & HOUSEHOLD PRODUCTS
                 19,200   Benckiser NV (B Shares).........................................  $          1,089,456
                                                                                            --------------------
                          TOTAL NETHERLANDS...............................................             5,254,679
                                                                                            --------------------
 
                          NEW ZEALAND (0.4%)
                          APPLIANCES & HOUSEHOLD DURABLES
                113,200   Fisher & Paykel Industries Ltd..................................               323,401
                                                                                            --------------------
                          NORWAY (1.6%)
                          BANKING
                 10,300   Sparebanken NOR.................................................               307,267
                                                                                            --------------------
                          MACHINERY
                 33,100   Kverneland ASA..................................................               860,162
                                                                                            --------------------
                          TOTAL NORWAY....................................................             1,167,429
                                                                                            --------------------
                          PORTUGAL (0.5%)
                          BUILDING MATERIALS
                  9,900   Cimpor-Cimentos de Portugal, SGPS, SA...........................               378,832
                                                                                            --------------------
 
                          SINGAPORE (1.3%)
                          COMMERCIAL SERVICES
                233,000   Informatics Holdings Ltd.*......................................                64,065
                                                                                            --------------------
                          ELECTRICAL EQUIPMENT
                 73,000   GP Batteries International Ltd.*................................               161,446
                                                                                            --------------------
                          ELECTRONIC COMPONENTS
                192,000   JIT Holdings Ltd.*..............................................               119,354
                                                                                            --------------------
                          ELECTRONICS & ELECTRICAL
                 34,000   Venture Manufacturing (Singapore) Ltd. .........................                92,672
                                                                                            --------------------
                          METALS
                270,000   Natsteel Broadway Ltd...........................................               270,000
                                                                                            --------------------
                          TELECOMMUNICATION EQUIPMENT
                 32,500   Datacraft Asia Ltd..............................................                94,250
                                                                                            --------------------
                          TOBACCO
                 25,000   Rothmans Industries Ltd. .......................................               116,557
                                                                                            --------------------
                          TOTAL SINGAPORE.................................................               918,344
                                                                                            --------------------
 
<CAPTION>
       NUMBER OF
         SHARES                                                                                    VALUE
- ----------------------------------------------------------------------------------------------------------------
<C>                       <S>                                                               <C>
 
                          SPAIN (2.2%)
                          COMMERCIAL SERVICES
                 25,900   Prosegur, CIA de Seguridad S.A..................................  $            327,081
                                                                                            --------------------
                          INVESTMENT COMPANIES
                 31,300   Corp. Financiera Reunida, S.A.*.................................               452,038
                                                                                            --------------------
                          PAPER PRODUCTS
                 15,500   Miquel y Costas & Miquel, S.A...................................               793,194
                                                                                            --------------------
 
                          TOTAL SPAIN.....................................................             1,572,313
                                                                                            --------------------
 
                          SWEDEN (3.1%)
                          AUTO PARTS - ORIGINAL EQUIPMENT
                 20,500   Haldex AB*......................................................               351,228
                                                                                            --------------------
                          CONTAINERS - PAPER
                 23,600   PLM AB..........................................................               390,813
                                                                                            --------------------
                          MEDICAL PRODUCTS & SUPPLIES
                 30,400   Nobel Biocare AB................................................               456,951
                                                                                            --------------------
                          OFFICE EQUIPMENT & SUPPLIES
                 15,700   Esselte AB (A Shares)...........................................               349,987
                                                                                            --------------------
                          PUBLISHING - NEWSPAPER
                 21,000   Marieberg Tidnings AB (A Shares)................................               635,326
                                                                                            --------------------
 
                          TOTAL SWEDEN....................................................             2,184,305
                                                                                            --------------------
 
                          SWITZERLAND (5.9%)
                          BUILDING & CONSTRUCTION
                    670   Forbo Holdings AG (Registered Shares)...........................               381,760
                                                                                            --------------------
                          MACHINERY
                    170   Bobst AG (Bearer Shares)........................................               320,971
                    510   Bucher Holding AG (Bearer Shares)...............................               717,026
                    980   SIG Schweizerische Industrie-Gesellschaft Holding AG (Registered
                            Shares).......................................................               928,456
                    900   Zehnder Holdings AG.............................................               561,969
                                                                                            --------------------
                                                                                                       2,528,422
                                                                                            --------------------
                          MANUFACTURING
                    950   Georg Fischer AG (Registered Shares)............................               416,386
                                                                                            --------------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       56
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
PORTFOLIO OF INVESTMENTS MAY 31, 1998, CONTINUED
 
<TABLE>
<CAPTION>
       NUMBER OF
         SHARES                                                                                    VALUE
- ----------------------------------------------------------------------------------------------------------------
<C>                       <S>                                                               <C>
                          RETAIL - FOOD CHAINS
                  3,200   Valora Holding AG...............................................  $            868,510
                                                                                            --------------------
 
                          TOTAL SWITZERLAND...............................................             4,195,078
                                                                                            --------------------
                          UNITED KINGDOM (18.7%)
                          ADVERTISING
                395,500   Aegis Group PLC*................................................               635,385
                                                                                            --------------------
                          BROADCASTING
                 67,900   Capital Radio PLC...............................................               748,636
                                                                                            --------------------
                          BUILDING MATERIALS
                306,900   SIG PLC.........................................................             1,356,501
                                                                                            --------------------
                          COMMERCIAL SERVICES
                 88,000   Corporate Services Group PLC....................................               330,114
                                                                                            --------------------
                          CONGLOMERATES
                 62,450   Charter PLC.....................................................               779,198
                                                                                            --------------------
                          COSMETICS
                139,500   Scholl PLC......................................................             1,148,999
                                                                                            --------------------
                          FOOD PROCESSING
                158,100   Devro PLC.......................................................             1,258,362
                                                                                            --------------------
                          FOODS
                471,800   Bernard Matthews PLC............................................               854,151
                                                                                            --------------------
                          MACHINERY & MACHINE TOOLS
                174,500   The Six Hundred Group PLC.......................................               418,376
                                                                                            --------------------
                          MANUFACTURING
                260,800   Bunzl PLC.......................................................             1,403,704
                125,100   Quadramatic PLC.................................................               473,368
                                                                                            --------------------
                                                                                                       1,877,072
                                                                                            --------------------
                          MEDICAL PRODUCTS & SUPPLIES
                188,800   Alliance Unichem PLC............................................             1,564,299
                                                                                            --------------------
                          METALS & MINING
                178,200   English China Clays PLC.........................................               744,049
                                                                                            --------------------
                          NURSING & HEALTH RELATED FACILITIES REVENUE
                107,700   Westminster Health Care Holdings PLC............................               535,759
                                                                                            --------------------
                          RETAIL - GENERAL MERCHANDISE
                 41,800   Le Riche Group Ltd..............................................               371,558
                                                                                            --------------------
                          WHOLESALE DISTRIBUTOR
                334,400   Christian Salvesen PLC..........................................               676,304
                                                                                            --------------------
 
                          TOTAL UNITED KINGDOM............................................            13,298,763
                                                                                            --------------------
</TABLE>
 
<TABLE>
<CAPTION>
       PRINCIPAL
       AMOUNT IN
       THOUSANDS                                                                                   VALUE
- ----------------------------------------------------------------------------------------------------------------
<C>                       <S>                                                               <C>
 
                          TOTAL COMMON AND PREFERRED STOCKS,
                          RIGHTS AND WARRANTS
                          (IDENTIFIED COST $59,598,500)...................................  $         67,237,488
                                                                                            --------------------
 
                          SHORT-TERM INVESTMENT (a) (5.6%)
                          U.S. GOVERNMENT AGENCY
$                 4,000   Federal Home Loan Mortgage Corp. 5.55% due 06/01/98 (AMORTIZED
                            COST $4,000,000)..............................................             4,000,000
                                                                                            --------------------
</TABLE>
 
<TABLE>
<S>                                                                                          <C>     <C>
TOTAL INVESTMENTS
(IDENTIFIED COST $63,598,500) (b)..........................................................  100.0 %   71,237,488
 
LIABILITIES IN EXCESS OF CASH AND OTHER ASSETS.............................................   (0.0)       (31,966)
                                                                                             ------  ------------
 
NET ASSETS.................................................................................  100.0 % $ 71,205,522
                                                                                             ------  ------------
                                                                                             ------  ------------
</TABLE>
 
- ---------------------
 
 *   Non-income producing security.
(a)  Security was purchased on a discount basis. The interest rate shown has
     been adjusted to reflect a money market equivalent yield.
(b)  The aggregate cost for federal income tax purposes approximates identified
     cost. The aggregate gross unrealized appreciation is $10,710,152 and the
     aggregate gross unrealized depreciation is $3,071,164, resulting in net
     unrealized appreciation of $7,638,988.
 
FORWARD FOREIGN CURRENCY CONTRACTS OPEN AT MAY 31, 1998:
 
<TABLE>
<CAPTION>
CONTRACTS TO       IN       DELIVERY    UNREALIZED
  DELIVER     EXCHANGE FOR    DATE     APPRECIATION
- ----------------------------------------------------
<S>           <C>           <C>       <C>
                       ITL
$   130,622    230,050,800  06/02/98      $ 105
 
CURRENCY ABBREVIATION:
- ----------------------------------------------------
ITL  Italian Lira.
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       57
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
SUMMARY OF INVESTMENTS MAY 31, 1998
<TABLE>
<CAPTION>
                                                                                          PERCENT OF
INDUSTRY                                                           VALUE                  NET ASSETS
<S>                                                         <C>                   <C>
- ------------------------------------------------------------------------------------------------------------
Advertising...............................................  $          1,149,117                        1.6 %
Agriculture...............................................               240,594                        0.3
Apparel...................................................                95,427                        0.1
Appliances & Household Durables...........................               323,401                        0.5
Auto Parts - Original Equipment...........................               351,228                        0.5
Auto Trucks & Parts.......................................             1,214,548                        1.7
Automotive................................................               226,074                        0.3
Banking...................................................             2,754,129                        3.9
Beverages.................................................               400,720                        0.6
Brewery...................................................               258,951                        0.4
Broadcasting..............................................               748,636                        1.1
Building & Construction...................................             2,502,626                        3.5
Building Materials........................................             3,398,325                        4.8
Business Services.........................................               298,164                        0.4
Chemicals - Diversified...................................               379,834                        0.5
Chemicals - Specialty.....................................               116,673                        0.2
Commercial Services.......................................             1,052,553                        1.5
Communications Equipment..................................               342,816                        0.5
Computer Software.........................................               321,354                        0.5
Computers.................................................               350,875                        0.5
Conglomerates.............................................               779,198                        1.1
Consumer Products.........................................               148,106                        0.2
Containers - Paper........................................               390,813                        0.6
Cosmetics.................................................             1,148,999                        1.6
Distribution..............................................               104,868                        0.1
Diversified Manufacturing.................................               893,601                        1.3
Electric..................................................               467,450                        0.7
Electrical Equipment......................................               511,978                        0.7
Electronic Components.....................................             1,156,967                        1.6
Electronics...............................................             2,312,515                        3.2
Electronics & Electrical..................................                92,672                        0.1
Engineering...............................................             1,247,157                        1.8
Entertainment/Gaming & Lodging............................               292,649                        0.4
Finance...................................................               570,054                        0.8
Food Processing...........................................             1,258,362                        1.8
Food Services.............................................               267,915                        0.4
Food Wholesalers..........................................               961,419                        1.4
Foods.....................................................             1,471,512                        2.1
Foods & Beverages.........................................                31,897                        0.0
Hand Tools................................................               369,031                        0.5
Health & Personal Care....................................               299,417                        0.4
Home Building.............................................               261,855                        0.4
Household Furnishings & Appliances........................               337,027                        0.5
Investment Companies......................................               452,038                        0.6
Leisure...................................................               190,144                        0.3
Leisure Time..............................................                79,222                        0.1
Machinery.................................................             7,767,919                       10.9
Machinery & Machine Tools.................................               812,686                        1.1
 
<CAPTION>
                                                                                          PERCENT OF
INDUSTRY                                                           VALUE                  NET ASSETS
- ------------------------------------------------------------------------------------------------------------
<S>                                                         <C>                   <C>
Manufacturing.............................................  $          2,864,857                        4.0 %
Medical Equipment.........................................               460,259                        0.6
Medical Products & Supplies...............................             2,021,250                        2.8
Medical Services..........................................               530,011                        0.7
Metals....................................................               270,000                        0.4
Metals & Mining...........................................             1,074,921                        1.5
Metals - Miscellaneous....................................               453,727                        0.6
Miscellaneous.............................................                92,779                        0.1
Miscellaneous Materials & Commodities.....................               280,936                        0.4
Multi-Industry............................................               219,229                        0.3
Multi-Line Insurance......................................               367,631                        0.5
Nursing & Health Related Facilities Revenue...............               535,759                        0.8
Office Equipment..........................................               603,541                        0.8
Office Equipment & Supplies...............................               349,987                        0.5
Oil Related...............................................               434,998                        0.6
Paper.....................................................               708,335                        1.0
Paper Products............................................               793,194                        1.1
Pharmaceuticals...........................................             1,178,007                        1.7
Publishing................................................               425,022                        0.6
Publishing - Newspaper....................................               635,326                        0.9
Real Estate...............................................                 3,504                        0.0
Restaurants...............................................             1,249,406                        1.8
Retail....................................................             1,176,441                        1.7
Retail - Department Stores................................               811,111                        1.1
Retail - Food Chains......................................               930,455                        1.3
Retail - General Merchandise..............................             1,884,398                        2.6
Retail - Specialty........................................             1,047,102                        1.5
Retail - Specialty Apparel................................               138,195                        0.2
Retail Stores.............................................               398,502                        0.6
Soap & Household Products.................................             1,089,456                        1.5
Telecommunication Equipment...............................                94,250                        0.1
Television................................................               944,497                        1.3
Textiles - Apparel........................................               156,838                        0.2
Tobacco...................................................               116,557                        0.2
Transportation - Miscellaneous............................             1,017,187                        1.4
U.S. Government Agency....................................             4,000,000                        5.6
Wholesale Distributor.....................................               676,304                        0.9
                                                            --------------------                     -----
                                                            $         71,237,488                      100.0 %
                                                            --------------------                     -----
                                                            --------------------                     -----
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                          PERCENT OF
TYPE OF INVESTMENT                                                 VALUE                  NET ASSETS
<S>                                                         <C>                   <C>
- ------------------------------------------------------------------------------------------------------------
Common Stocks.............................................  $         64,063,412                       90.0 %
Preferred Stocks..........................................             3,150,379                        4.4
Rights & Warrants.........................................                23,697                        0.0
Short-Term Investment.....................................             4,000,000                        5.6
                                                            --------------------                     -----
                                                            $         71,237,488                      100.0 %
                                                            --------------------                     -----
                                                            --------------------                     -----
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       58
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
FINANCIAL STATEMENTS
 
STATEMENT OF ASSETS AND LIABILITIES
MAY 31, 1998
 
<TABLE>
<S>                                                                                             <C>
ASSETS:
Investments in securities, at value
  (identified cost $63,598,500)...............................................................  $ 71,237,488
Cash (including $72,025 in foreign currency)..................................................       212,384
Receivable for:
    Dividends.................................................................................       120,680
    Foreign withholding taxes reclaimed.......................................................        59,092
    Shares of beneficial interest sold........................................................        30,300
Deferred organizational expenses..............................................................        38,968
Prepaid expenses and other assets.............................................................        50,640
                                                                                                ------------
     TOTAL ASSETS.............................................................................    71,749,552
                                                                                                ------------
LIABILITIES:
Payable for:
    Shares of beneficial interest repurchased.................................................       187,540
    Investments purchased.....................................................................       157,686
    Investment management fee.................................................................        70,171
    Plan of distribution fee..................................................................        60,142
Accrued expenses and other payables...........................................................        68,491
                                                                                                ------------
     TOTAL LIABILITIES........................................................................       544,030
                                                                                                ------------
     NET ASSETS...............................................................................  $ 71,205,522
                                                                                                ------------
                                                                                                ------------
COMPOSITION OF NET ASSETS:
Paid-in-capital...............................................................................  $ 85,762,066
Net unrealized appreciation...................................................................     7,633,440
Accumulated net realized loss.................................................................   (22,189,984)
                                                                                                ------------
     NET ASSETS...............................................................................  $ 71,205,522
                                                                                                ------------
                                                                                                ------------
CLASS A SHARES:
Net Assets....................................................................................      $318,083
Shares Outstanding (UNLIMITED AUTHORIZED, $.01 PAR VALUE).....................................        35,927
     NET ASSET VALUE PER SHARE................................................................         $8.85
                                                                                                ------------
                                                                                                ------------
 
     MAXIMUM OFFERING PRICE PER SHARE,
       (NET ASSET VALUE PLUS 5.54% OF NET ASSET VALUE)........................................         $9.34
                                                                                                ------------
                                                                                                ------------
CLASS B SHARES:
Net Assets....................................................................................   $69,959,982
Shares Outstanding (UNLIMITED AUTHORIZED, $.01 PAR VALUE).....................................     7,954,043
     NET ASSET VALUE PER SHARE................................................................         $8.80
                                                                                                ------------
                                                                                                ------------
CLASS C SHARES:
Net Assets....................................................................................       $77,474
Shares Outstanding (UNLIMITED AUTHORIZED, $.01 PAR VALUE).....................................         8,808
     NET ASSET VALUE PER SHARE................................................................         $8.80
                                                                                                ------------
                                                                                                ------------
CLASS D SHARES:
Net Assets....................................................................................      $849,983
Shares Outstanding (UNLIMITED AUTHORIZED, $.01 PAR VALUE).....................................        95,823
     NET ASSET VALUE PER SHARE................................................................         $8.87
                                                                                                ------------
                                                                                                ------------
</TABLE>
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       59
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
FINANCIAL STATEMENTS, CONTINUED
 
STATEMENT OF OPERATIONS
FOR THE YEAR ENDED MAY 31, 1998*
 
<TABLE>
<S>                                                                                              <C>
NET INVESTMENT INCOME:
 
INCOME
Dividends (net of $169,989 foreign withholding tax)............................................  $ 1,349,972
Interest.......................................................................................      133,135
                                                                                                 -----------
 
     TOTAL INCOME..............................................................................    1,483,107
                                                                                                 -----------
 
EXPENSES
Investment management fee......................................................................      985,364
Plan of distribution fee (Class A shares)......................................................          180
Plan of distribution fee (Class B shares)......................................................      812,930
Plan of distribution fee (Class C shares)......................................................          533
Transfer agent fees and expenses...............................................................      235,507
Custodian fees.................................................................................      146,679
Professional fees..............................................................................       92,644
Registration fees..............................................................................       87,509
Shareholder reports and notices................................................................       68,421
Organizational expenses........................................................................       35,474
Trustees' fees and expenses....................................................................       13,795
Other..........................................................................................       14,903
                                                                                                 -----------
 
     TOTAL EXPENSES............................................................................    2,493,939
                                                                                                 -----------
 
     NET INVESTMENT LOSS.......................................................................   (1,010,832)
                                                                                                 -----------
 
NET REALIZED AND UNREALIZED GAIN (LOSS):
Net realized gain (loss) on:
    Investments................................................................................    5,159,972
    Foreign exchange transactions..............................................................     (171,606)
                                                                                                 -----------
 
     NET GAIN..................................................................................    4,988,366
                                                                                                 -----------
Net change in unrealized appreciation/depreciation on:
    Investments................................................................................   (6,924,079)
    Translation of forward foreign currency contracts, other assets and liabilities denominated
      in foreign currencies....................................................................       (3,606)
                                                                                                 -----------
 
     NET DEPRECIATION..........................................................................   (6,927,685)
                                                                                                 -----------
 
     NET LOSS..................................................................................   (1,939,319)
                                                                                                 -----------
 
NET DECREASE...................................................................................  $(2,950,151)
                                                                                                 -----------
                                                                                                 -----------
</TABLE>
 
- ---------------------
 
 *   Class A, Class C and Class D shares were issued July 28, 1997.
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       60
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
FINANCIAL STATEMENTS, CONTINUED
 
STATEMENT OF CHANGES IN NET ASSETS
 
<TABLE>
<CAPTION>
                                                                                  FOR THE YEAR
                                                                                     ENDED      FOR THE YEAR
                                                                                    MAY 31,        ENDED
                                                                                     1998*      MAY 31, 1997
- ------------------------------------------------------------------------------------------------------------
<S>                                                                               <C>           <C>
 
INCREASE (DECREASE) IN NET ASSETS:
 
OPERATIONS:
Net investment loss.............................................................  $ (1,010,832) $ (1,703,229)
Net realized gain (loss)........................................................     4,988,366   (14,228,804)
Net change in unrealized appreciation...........................................    (6,927,685)      756,452
                                                                                  ------------  ------------
 
     NET DECREASE...............................................................    (2,950,151)  (15,175,581)
 
Dividends to shareholders from net investment income - Class B shares...........       --         (5,142,946)
Net decrease from transactions in shares of beneficial interest.................   (31,152,512)  (20,347,659)
Capital contribution............................................................       --            720,000
                                                                                  ------------  ------------
 
     NET DECREASE...............................................................   (34,102,663)  (39,946,186)
 
NET ASSETS:
Beginning of period.............................................................   105,308,185   145,254,371
                                                                                  ------------  ------------
 
     END OF PERIOD
    (INCLUDING DIVIDENDS IN EXCESS OF NET INVESTMENT INCOME OF $0 AND
    $1,880,282, RESPECTIVELY)...................................................  $ 71,205,522  $105,308,185
                                                                                  ------------  ------------
                                                                                  ------------  ------------
</TABLE>
 
- ---------------------
 
 *   Class A, Class C and Class D shares were issued July 28, 1997.
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       61
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
NOTES TO FINANCIAL STATEMENTS MAY 31, 1998
 
1. ORGANIZATION AND ACCOUNTING POLICIES
 
Morgan Stanley Dean Witter International SmallCap Fund (the "Fund") is
registered under the Investment Company Act of 1940, as amended (the "Act"), as
a non-diversified, open-end management investment company. The Fund's investment
objective is long-term growth of capital. The Fund seeks to achieve its
objective by investing primarily in equity securities of "small capitalization"
companies located outside of the United States. The Fund was organized as a
Massachusetts business trust on April 21, 1994 and commenced operations on July
29, 1994. On July 28, 1997, the Fund commenced offering three additional classes
of shares, with the then current shares designated as Class B shares.
 
Effective June 22, 1998, the following entities have changed their name:
 
<TABLE>
<CAPTION>
Old Name                                    New Name
- ------------------------------------------  --------------------------------------------------------
<S>                                         <C>
Dean Witter International SmallCap Fund     Morgan Stanley Dean Witter International SmallCap Fund
Dean Witter InterCapital Inc.               Morgan Stanley Dean Witter Advisors Inc.
Dean Witter Distributors Inc.               Morgan Stanley Dean Witter Distributors Inc.
</TABLE>
 
The Fund offers Class A shares, Class B shares, Class C shares and Class D
shares. The four classes are substantially the same except that most Class A
shares are subject to a sales charge imposed at the time of purchase, some Class
A shares, and most Class B shares and Class C shares are subject to a contingent
deferred sales charge imposed on shares redeemed within one year, six years and
one year, respectively. Class D shares are not subject to a sales charge.
Additionally, Class A shares, Class B shares and Class C shares incur
distribution expenses.
 
The preparation of financial statements in accordance with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the reported amounts and disclosures. Actual results could differ from
those estimates.
 
The following is a summary of significant accounting policies:
 
A. VALUATION OF INVESTMENTS -- (1) an equity security listed or traded on the
New York, American or other domestic or foreign stock exchange is valued at its
latest sale price on that exchange prior to the time when assets are valued; if
there were no sales that day, the security is valued at the latest bid price (in
cases where securities are traded on more than one exchange, the securities are
valued on the exchange designated as the primary market pursuant to procedures
adopted by the Trustees); (2) listed options are valued at the latest sale price
on the exchange on which they are listed unless
 
                                       62
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
NOTES TO FINANCIAL STATEMENTS MAY 31, 1998, CONTINUED
 
no sales of such options have taken place that day, in which case they will be
valued at the mean between their latest bid and asked price; (3) all other
portfolio securities for which over-the-counter market quotations are readily
available are valued at the latest available bid price prior to the time of
valuation; (4) when market quotations are not readily available, including
circumstances under which it is determined by Morgan Stanley Dean Witter
Advisors Inc. (the "Investment Manager") or Morgan Stanley Asset Management Inc.
(the "Sub-Advisor"), an affiliate of the Investment Manager, that sale and bid
prices are not reflective of a security's market value, portfolio securities are
valued at their fair value as determined in good faith under procedures
established by and under the general supervision of the Trustees (valuation of
debt securities for which market quotations are not readily available may be
based upon current market prices of securities which are comparable in coupon,
rating and maturity or an appropriate matrix utilizing similar factors); and (5)
short-term debt securities having a maturity date of more than sixty days at
time of purchase are valued on a mark-to-market basis until sixty days prior to
maturity and thereafter at amortized cost based on their value on the 61st day.
Short-term debt securities having a maturity date of sixty days or less at the
time of purchase are valued at amortized cost.
 
B. ACCOUNTING FOR INVESTMENTS -- Security transactions are accounted for on the
trade date (date the order to buy or sell is executed). Realized gains and
losses on security transactions are determined by the identified cost method.
Dividend income and other distributions are recorded on the ex-dividend date
except for certain dividends from foreign securities which are recorded as soon
as the Fund is informed after the ex-dividend date. Discounts are accreted over
the life of the respective securities. Interest income is accrued daily.
 
C. MULTIPLE CLASS ALLOCATIONS -- Investment income, expenses (other than
distribution fees), and realized and unrealized gains and losses are allocated
to each class of shares based upon the relative net asset value on the date such
items are recognized. Distribution fees are charged directly to the respective
class.
 
D. OPTION ACCOUNTING PRINCIPLES -- When the Fund purchases a call or put option,
the premium paid is recorded as an investment which is subsequently
marked-to-market to reflect the current market value. If a purchased option
expires, the Fund will realize a loss to the extent of the premium paid. If the
Fund enters into a closing sale transaction, a gain or loss is realized for the
difference between the proceeds from the sale and the cost of the option. If a
put option is exercised, the cost of the
 
                                       63
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
NOTES TO FINANCIAL STATEMENTS MAY 31, 1998, CONTINUED
 
security or currency sold upon exercise will be increased by the premium
originally paid. If a call option is exercised, the cost of the security
purchased upon exercise will be increased by the premium originally paid.
 
E. FOREIGN CURRENCY TRANSLATION -- The books and records of the Fund are
maintained in U.S. dollars as follows: (1) the foreign currency market value of
investment securities, other assets and liabilities and forward foreign currency
contracts are translated at the exchange rates prevailing at the end of the
period; and (2) purchases, sales, income and expenses are translated at the
exchange rates prevailing on the respective dates of such transactions. The
resultant exchange gains and losses are included in the Statement of Operations
as realized and unrealized gain/loss on foreign exchange transactions. Pursuant
to U.S. Federal income tax regulations, certain foreign exchange gains/losses
included in realized and unrealized gain/loss are included in or are a reduction
of ordinary income for federal income tax purposes. The Fund does not isolate
that portion of the results of operations arising as a result of changes in the
foreign exchange rates from the changes in the market prices of the securities.
 
F. FORWARD FOREIGN CURRENCY CONTRACTS -- The Fund may enter into forward foreign
currency contracts which are valued daily at the appropriate exchange rates. The
resultant unrealized exchange gains and losses are included in the Statement of
Operations as unrealized foreign currency gain or loss. The Fund records
realized gains or losses on delivery of the currency or at the time the forward
contract is extinguished (compensated) by entering into a closing transaction
prior to delivery.
 
G. FEDERAL INCOME TAX STATUS -- It is the Fund's policy to comply with the
requirements of the Internal Revenue Code applicable to regulated investment
companies and to distribute all of its taxable income to its shareholders.
Accordingly, no federal income tax provision is required.
 
H. DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS -- The Fund records dividends and
distributions to its shareholders on the ex-dividend date. The amount of
dividends and distributions from net investment income and net realized capital
gains are determined in accordance with federal income tax regulations which may
differ from generally accepted accounting principles. These "book/tax"
differences are either considered temporary or permanent in nature. To the
extent these differences are permanent in nature, such amounts are reclassified
within the capital accounts based on their federal tax-basis treatment;
temporary differences do not require reclassification. Dividends and
distributions which exceed net investment income and net realized capital gains
for financial
 
                                       64
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
NOTES TO FINANCIAL STATEMENTS MAY 31, 1998, CONTINUED
 
reporting purposes but not for tax purposes are reported as dividends in excess
of net investment income or distributions in excess of net realized capital
gains. To the extent they exceed net investment income and net realized capital
gains for tax purposes, they are reported as distributions of paid-in-capital.
 
I. ORGANIZATIONAL EXPENSES -- The Investment Manager paid the organizational
expenses of the Fund in the amount of approximately $172,000 and was reimbursed
for the full amount thereof. Such expenses have been deferred and are being
amortized on the straight line method over a period not to exceed five years
from the commencement of operations.
 
2. INVESTMENT MANAGEMENT AND SUB-ADVISORY AGREEMENTS
 
Pursuant to an Investment Management Agreement, in effect through November 30,
1997, the Fund paid the Investment Manager a management fee, accrued daily and
payable monthly, by applying the annual rate of 1.25% to the net assets of the
Fund determined as of the close of each business day. Effective December 1,
1997, the Agreement was amended to reduce the annual rate from 1.25% to 1.15% of
the Fund's daily net assets
 
Under the terms of the Agreement, in addition to managing the Fund's
investments, the Investment Manager maintains certain of the Fund's books and
records and furnishes, at its own expense, office space, facilities, equipment,
clerical, bookkeeping and certain legal services and pays the salaries of all
personnel, including officers of the Fund who are employees of the Investment
Manager. The Investment Manager also bears the cost of telephone services, heat,
light, power and other utilities provided to the Fund.
 
Under a Sub-Advisory Agreement in effect through November 30, 1997, between
Morgan Grenfell Investment Services Limited (the "Former Sub-Advisor") and the
Investment Manager, the Former Sub-Advisor provided the Fund with investment
advice and portfolio management relating to the Fund's investments in
securities, subject to the overall supervision of the Investment Manager. As
compensation for its services provided pursuant to the Sub-Advisory Agreement,
the Investment Manager paid the Former-Sub-Advisor monthly compensation equal to
40% of its monthly compensation.
 
                                       65
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
NOTES TO FINANCIAL STATEMENTS MAY 31, 1998, CONTINUED
 
Effective December 1, 1997 under a new Sub-Advisory Agreement, the Sub-Advisor
took on all the responsibilities of the Former Sub-Advisor. As compensation for
its services provided pursuant to the new Sub-Advisory Agreement, the Investment
Manager pays the Sub-Advisor monthly compensation equal to 40% of its monthly
compensation.
 
3. PLAN OF DISTRIBUTION
 
Shares of the Fund are distributed by Morgan Stanley Dean Witter Distributors
Inc. (the "Distributor"), an affiliate of the Investment Manager. The Fund has
adopted a Plan of Distribution (the "Plan") pursuant to Rule 12b-1 under the
Act. The Plan provides that the Fund will pay the Distributor a fee which is
accrued daily and paid monthly at the following annual rates: (i) Class A - up
to 0.25% of the average daily net assets of Class A; (ii) Class B - 1.0% of the
lesser of: (a) the average daily aggregate gross sales of the Class B shares
since the inception of the Fund (not including reinvestment of dividend or
capital gain distributions) less the average daily aggregate net asset value of
the Class B shares redeemed since the Fund's inception upon which a contingent
deferred sales charge has been imposed or waived; or (b) the average daily net
assets of Class B; and (iii) Class C - up to 1.0% of the average daily net
assets of Class C. In the case of Class A shares, amounts paid under the Plan
are paid to the Distributor for services provided. In the case of Class B and
Class C shares, amounts paid under the Plan are paid to the Distributor for
services provided and the expenses borne by it and others in the distribution of
the shares of these Classes, including the payment of commissions for sales of
these Classes and incentive compensation to, and expenses of, Morgan Stanley
Dean Witter Financial Advisors and others who engage in or support distribution
of the shares or who service shareholder accounts, including overhead and
telephone expenses; printing and distribution of prospectuses and reports used
in connection with the offering of these shares to other than current
shareholders; and preparation, printing and distribution of sales literature and
advertising materials. In addition, the Distributor may utilize fees paid
pursuant to the Plan, in the case of Class B shares, to compensate Dean Witter
Reynolds Inc. ("DWR"), an affiliate of the Investment Manager and Distributor,
and other selected broker-dealers for their opportunity costs in advancing such
amounts, which compensation would be in the form of a carrying charge on any
unreimbursed expenses.
 
In the case of Class B shares, provided that the Plan continues in effect, any
cumulative expenses incurred by the Distributor but not yet recovered may be
recovered through the payment of future distribution fees from the Fund pursuant
to the Plan and contingent deferred sales charges paid by investors upon
redemption of Class B shares. Although there is no legal obligation for the Fund
to
 
                                       66
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
NOTES TO FINANCIAL STATEMENTS MAY 31, 1998, CONTINUED
 
pay expenses incurred in excess of payments made to the Distributor under the
Plan and the proceeds of contingent deferred sales charges paid by investors
upon redemption of shares, if for any reason the Plan is terminated, the
Trustees will consider at that time the manner in which to treat such expenses.
The Distributor has advised the Fund that such excess amounts, including
carrying charges, totaled $8,243,906 at May 31, 1998.
 
In the case of Class A shares and Class C shares, expenses incurred pursuant to
the Plan in any calendar year in excess of 0.25% or 1.0% of the average daily
net assets of Class A or Class C, respectively, will not be reimbursed by the
Fund through payments in any subsequent year, except that expenses representing
a gross sales credit to Morgan Stanley Dean Witter Financial Advisors or other
selected broker-dealer representatives may be reimbursed in the subsequent
calendar year. For the period ended May 31, 1998, the distribution fee was
accrued for Class A shares and Class C shares at the annual rate of 0.24% and
1.0%, respectively.
 
The Distributor has informed the Fund that for the period ended May 31, 1998, it
received contingent deferred sales charges from certain redemptions of the
Fund's Class B shares and Class C shares of $365,257 and $96, respectively and
received $3,572 in front-end sales charges from sales of the Fund's Class A
shares. The respective shareholders pay such charges which are not an expense of
the Fund.
 
4. SECURITY TRANSACTIONS AND TRANSACTIONS WITH AFFILIATES
 
The cost of purchases and proceeds from sales of portfolio securities, excluding
short-term investments, for the year ended May 31, 1998 aggregated $137,645,188
and $168,692,652, respectively.
 
For the year ended May 31, 1998, the Fund incurred brokerage commissions of
$15,696 with Morgan Stanley & Co., Inc., an affiliate of the Investment Manager,
for portfolio transactions executed on behalf of the Fund.
 
Morgan Stanley Dean Witter Trust FSB, an affiliate of the Investment Manager and
Distributor, is the Fund's transfer agent. At May 31, 1998, the Fund had
transfer agent fees and expenses payable of approximately $12,000.
 
During the year ended May 31, 1997, foreign regulatory authorities initiated an
investigation involving an individual associated with an affiliate of the Fund's
Former Sub-Advisor. Although this investigation did not at any time involve the
Fund or the Investment Manager, the Former Sub-
 
                                       67
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
NOTES TO FINANCIAL STATEMENTS MAY 31, 1998, CONTINUED
 
Advisor's affiliate purchased from the Fund two securities whose separate
holdings by the affiliate had become part of the investigation and, on May 27,
1997, voluntarily committed to contribute $720,000 to the Fund, which was paid
in full on June 2, 1997. The two securities represented only a very small
percentage of the Fund's portfolio (approximately one-half of one percent) and
were purchased by the Former Sub-Advisor's affiliate at cost plus interest.
 
5. SHARES OF BENEFICIAL INTEREST
 
Transactions in shares of beneficial interest were as follows:
 
<TABLE>
<CAPTION>
                                                                           FOR THE YEAR                  FOR THE YEAR
                                                                              ENDED                         ENDED
                                                                           MAY 31, 1998                  MAY 31, 1997
                                                                   ----------------------------   --------------------------
                                                                     SHARES          AMOUNT         SHARES         AMOUNT
                                                                   -----------   --------------   -----------   ------------
<S>                                                                <C>           <C>              <C>           <C>
CLASS A SHARES*
Sold.............................................................       37,467   $      315,275       --             --
Redeemed.........................................................       (1,540)         (12,809)      --             --
                                                                   -----------   --------------   -----------   ------------
Net increase -- Class A..........................................       35,927          302,466       --             --
                                                                   -----------   --------------   -----------   ------------
 
CLASS B SHARES
Sold.............................................................    1,496,043       12,527,299     2,242,741   $ 21,576,152
Reinvestment of dividends........................................      --              --             534,196      4,743,655
Redeemed.........................................................   (5,352,008)     (44,859,325)   (5,096,720)   (46,667,466)
                                                                   -----------   --------------   -----------   ------------
Net decrease -- Class B..........................................   (3,855,965)     (32,332,026)   (2,319,783)   (20,347,659)
                                                                   -----------   --------------   -----------   ------------
 
CLASS C SHARES*
Sold.............................................................       12,297          106,649       --             --
Redeemed.........................................................       (3,489)         (27,753)      --             --
                                                                   -----------   --------------   -----------   ------------
Net increase -- Class C..........................................        8,808           78,896       --             --
                                                                   -----------   --------------   -----------   ------------
 
CLASS D SHARES*
Sold.............................................................       95,823          798,152       --             --
                                                                   -----------   --------------   -----------   ------------
Net decrease in Fund.............................................   (3,715,407)  $  (31,152,512)   (2,319,783)  $(20,347,659)
                                                                   -----------   --------------   -----------   ------------
                                                                   -----------   --------------   -----------   ------------
</TABLE>
 
- ---------------------
 
 *   For the period July 28, 1997 (issue date) through May 31, 1998.
 
                                       68
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
NOTES TO FINANCIAL STATEMENTS MAY 31, 1998, CONTINUED
 
6. FEDERAL INCOME TAX STATUS
 
At May 31, 1998, the Fund had a net capital loss carryover of approximately
$21,944,000, which may be used to offset future capital gains to the extent
provided by regulations, which is available through May 31 of the following
years:
 
<TABLE>
<CAPTION>
      AMOUNTS IN THOUSANDS
- ---------------------------------
  2004       2005        2006
- ---------  ---------  -----------
<S>        <C>        <C>
$   7,034  $   1,455  $    13,455
- ---------  ---------  -----------
- ---------  ---------  -----------
</TABLE>
 
As of May 31, 1998, the Fund had temporary book/tax differences attributable to
capital loss deferrals on wash sales and permanent book/tax differences
primarily attributable to a net operating loss, foreign currency gains and tax
adjustments on passive foreign investment companies sold by the Fund. To reflect
reclassifications arising from the permanent differences, paid-in-capital was
charged $154,574, accumulated net realized loss was charged $2,736,540 and net
investment loss was credited $2,891,114.
 
7. PURPOSES OF AND RISKS RELATING TO CERTAIN FINANCIAL INSTRUMENTS
 
The Fund may enter into forward foreign currency contracts ("forward contracts")
to facilitate settlement of foreign currency denominated portfolio transactions
or to manage foreign currency exposure associated with foreign currency
denominated securities. The Fund may also purchase put options on foreign
currencies in which the securities are denominated to hedge against adverse
foreign currency and market risk.
 
Forward contracts involve elements of market risk in excess of the amounts
reflected in the Statement of Assets and Liabilities. The Fund bears the risk of
an unfavorable change in the foreign exchange rates underlying the forward
contracts. Risks may also arise upon entering into these contracts and
over-the-counter purchased put options from the potential inability of the
counterparties to meet the terms of their contracts.
 
At May 31, 1998, there was an outstanding forward contract.
 
                                       69
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
FINANCIAL HIGHLIGHTS
 
Selected  ratios  and  per  share  data  for  a  share  of  beneficial  interest
outstanding throughout each period:
 
<TABLE>
<CAPTION>
                                                                      FOR THE PERIOD
                                FOR THE YEAR ENDED MAY 31,            JULY 29, 1994*
                          ---------------------------------------         THROUGH
                           1998**++        1997           1996         MAY 31, 1995
- -------------------------------------------------------------------------------------
 
<S>                       <C>            <C>            <C>           <C>
CLASS B SHARES
 
PER SHARE OPERATING
PERFORMANCE:
 
Net asset value,
 beginning of period..... $     8.92     $   10.28      $    8.54     $      10.00
                          ----------     ---------      ---------           ------
 
Net investment loss......      (0.11)        (0.16)         (0.08)           (0.08)
 
Net realized and
 unrealized gain
 (loss)..................      (0.01)        (0.88)          1.82            (1.38)
                          ----------     ---------      ---------           ------
 
Total from investment
 operations..............      (0.12)        (1.04)          1.74            (1.46)
                          ----------     ---------      ---------           ------
 
Dividends from net
 investment income.......     --             (0.38)        --              --
                          ----------     ---------      ---------           ------
 
Capital contribution.....     --              0.06         --              --
                          ----------     ---------      ---------           ------
 
Net asset value, end of
 period.................. $     8.80     $    8.92      $   10.28     $       8.54
                          ----------     ---------      ---------           ------
                          ----------     ---------      ---------           ------
 
TOTAL INVESTMENT
RETURN+..................      (1.35)%       (9.52)%(3)     20.37%          (14.60)%(1)
 
RATIOS TO AVERAGE NET
ASSETS:
Expenses.................       3.06%         2.89%          2.85%            2.90%(2)
 
Net investment loss......      (1.24)%       (1.34)%        (1.09)%          (1.12)%(2)
 
SUPPLEMENTAL DATA:
Net assets, end of
 period, in thousands....    $69,960      $105,308       $145,254          $93,729
 
Portfolio turnover
 rate....................        178%           46%            44%              41%(1)
 
Average commission rate
 paid....................    $0.0047       $0.0030        $0.0069          --
</TABLE>
 
- ---------------------
 
 *   Commencement of operations.
**   Prior to July 28, 1997, the Fund issued one class of shares. All shares of
     the Fund held prior to that date have been designated Class B shares.
++   The per share amounts were computed using an average number of shares
     outstanding during the period.
 +   Does not reflect the deduction of sales charge. Calculated based on the net
     asset value as of the last business day of the period.
(1)  Not annualized.
(2)  Annualized.
(3)  Includes voluntary capital contribution from the Former Sub-Advisor, the
     effect of which was to increase total return by 0.59%.
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       70
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
FINANCIAL HIGHLIGHTS, CONTINUED
 
<TABLE>
<CAPTION>
                                                                         FOR THE PERIOD
                                                                         JULY 28, 1997*
                                                                            THROUGH
                                                                         MAY 31, 1998++
- ----------------------------------------------------------------------------------------
<S>                                                                     <C>
CLASS A SHARES
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..................................      $  8.96
Net realized and unrealized loss......................................        (0.11)
                                                                             ------
Net asset value, end of period........................................      $  8.85
                                                                             ------
                                                                             ------
TOTAL INVESTMENT RETURN+..............................................        (1.23)%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         2.52%(2)
Net investment income.................................................         0.03%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................         $318
Portfolio turnover rate...............................................          178%
Average commission rate paid..........................................      $0.0047
 
CLASS C SHARES
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..................................      $  8.96
                                                                             ------
Net investment loss...................................................        (0.09)
Net realized and unrealized loss......................................        (0.07)
                                                                             ------
Total from investment operations......................................        (0.16)
                                                                             ------
Net asset value, end of period........................................      $  8.80
                                                                             ------
                                                                             ------
TOTAL INVESTMENT RETURN+..............................................        (1.79)%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         3.16%(2)
Net investment loss...................................................        (1.37)%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................          $77
Portfolio turnover rate...............................................          178%
Average commission rate paid..........................................      $0.0047
</TABLE>
 
- ---------------------
 
 *   The date shares were issued.
++   The per share amounts were computed using an average number of shares
     outstanding during the period.
 +   Does not reflect the deduction of sales charge. Calculated based on the net
     asset value as of the last business day of the period.
(1)  Not annualized.
(2)  Annualized.
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       71
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
FINANCIAL HIGHLIGHTS, CONTINUED
 
<TABLE>
<CAPTION>
                                                                         FOR THE PERIOD
                                                                         JULY 28, 1997*
                                                                            THROUGH
                                                                         MAY 31, 1998++
- ----------------------------------------------------------------------------------------
 
<S>                                                                     <C>
CLASS D SHARES
 
PER SHARE OPERATING PERFORMANCE:
 
Net asset value, beginning of period..................................      $  8.96
 
Net realized and unrealized loss......................................        (0.09)
                                                                              -----
 
Net asset value, end of period........................................      $  8.87
                                                                              -----
                                                                              -----
 
TOTAL INVESTMENT RETURN+..............................................        (1.00)%(1)
 
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         2.31%(2)
 
Net investment loss...................................................        (0.02)%(2)
 
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................      $   850
 
Portfolio turnover rate...............................................          178%
 
Average commission rate paid..........................................      $0.0047
</TABLE>
 
- ---------------------
 
 *   The date shares were first issued.
++   The per share amounts were computed using an average number of shares
     outstanding during the period.
 +   Calculated based on the net asset value as of the last business day of the
     period.
(1)  Not annualized.
(2)  Annualized.
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       72
<PAGE>
MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
REPORT OF INDEPENDENT ACCOUNTANTS
 
TO THE SHAREHOLDERS AND TRUSTEES
OF MORGAN STANLEY DEAN WITTER INTERNATIONAL SMALLCAP FUND
 
In our opinion, the accompanying statement of assets and liabilities, including
the portfolio of investments, and the related statements of operations and of
changes in net assets and the financial highlights present fairly, in all
material respects, the financial position of Morgan Stanley Dean Witter
International SmallCap Fund (the "Fund"), formerly Dean Witter International
SmallCap Fund, at May 31, 1998, the results of its operations for the year then
ended, the changes in its net assets for each of the two years in the period
then ended and the financial highlights for each of the periods presented, in
conformity with generally accepted accounting principles. These financial
statements and financial highlights (hereafter referred to as "financial
statements") are the responsibility of the Fund's management; our responsibility
is to express an opinion on these financial statements based on our audits. We
conducted our audits of these financial statements in accordance with generally
accepted auditing standards which require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements, assessing
the accounting principles used and significant estimates made by management, and
evaluating the overall financial statement presentation. We believe that our
audits, which included confirmation of securities at May 31, 1998 by
correspondence with the custodian and brokers and the application of alternative
auditing procedures where confirmations from brokers were not received, provide
a reasonable basis for the opinion expressed above.
 
PricewaterhouseCoopers LLP
1177 AVENUE OF THE AMERICAS
NEW YORK, NEW YORK 10036
JULY 10, 1998
 
                                       73


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