MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUS
485BPOS, 2000-11-27
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<PAGE>




   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 27, 2000
                                                     REGISTRATION NOS.: 2-81151
                                                                       811-3639

================================================================================
                      SECURITIES AND EXCHANGE COMMISSION


                             WASHINGTON, D.C. 20549

                               ----------------

                                   FORM N-1A


                            REGISTRATION STATEMENT
                      UNDER THE SECURITIES ACT OF 1933                       [X]
                        PRE-EFFECTIVE AMENDMENT NO.                          [ ]
                      POST-EFFECTIVE AMENDMENT NO. 20                        [X]
                                     AND/OR
              REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY
                                  ACT OF 1940                                [X]
                                AMENDMENT NO. 22                             [X]

                                ----------------

                           MORGAN STANLEY DEAN WITTER
                       DEVELOPING GROWTH SECURITIES TRUST

                        (A MASSACHUSETTS BUSINESS TRUST)
               (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)


                            TWO WORLD TRADE CENTER
                           NEW YORK, NEW YORK 10048
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICE)


      REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (212) 392-1600

                               BARRY FINK, ESQ.
                            TWO WORLD TRADE CENTER
                           NEW YORK, NEW YORK 10048
               (NAME AND ADDRESS OF AGENT FOR SERVICE) Copy to:


                            STUART M. STRAUSS, ESQ.
                             MAYER, BROWN & PLATT
                                 1675 BROADWAY
                            NEW YORK, NEW YORK 10019

                               ----------------

                 APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:

 As soon as practicable after this Post-Effective Amendment becomes effective.


 IT IS PROPOSED THAT THIS FILING WILL BECOME EFFECTIVE (CHECK APPROPRIATE BOX)

                          immediately upon filing pursuant to paragraph (b)
                     ----
                       X  on November 29, 2000 pursuant to paragraph (b)
                     ----
                          60 days after filing pursuant to paragraph (a)
                     ----
                          on (date) pursuant to paragraph (a) of rule 485.
                     ----

                               ----------------


           AMENDING THE PROSPECTUS AND UPDATING FINANCIAL STATEMENTS

================================================================================
<PAGE>




                                                PROSPECTUS - NOVEMBER 29, 2000

Morgan Stanley Dean Witter

              ----------------------------------------------------------------


                                             DEVELOPING GROWTH SECURITIES TRUST



                              A MUTUAL FUND THAT SEEKS LONG-TERM CAPITAL GROWTH

The Securities and Exchange Commission has not approved or disapproved these
 securities or passed upon the adequacy of this Prospectus.
            Any representation to the contrary is a criminal offense.



<PAGE>




CONTENTS


<TABLE>
<S>                         <C>
The Fund                    Investment Objective .........................    1
                            Principal Investment Strategies ..............    1
                            Principal Risks ..............................    2
                            Past Performance .............................    4
                            Fees and Expenses ............................    5
                            Additional Investment Strategy Information ...    6
                            Additional Risk Information ..................    7
                            Fund Management ..............................    7

Shareholder Information     Pricing Fund Shares ..........................    8
                            How to Buy Shares ............................    8
                            How to Exchange Shares .......................   10
                            How to Sell Shares ...........................   12
                            Distributions ................................   14
                            Tax Consequences .............................   14
                            Share Class Arrangements .....................   15

Financial Highlights         .............................................   24

Our Family of Funds          .................................Inside Back Cover

                            This Prospectus contains important information about
                            the Fund. Please read it carefully and keep it for
                            future reference.
</TABLE>



<PAGE>



THE FUND


[GRAPHIC OMITTED]


      INVESTMENT OBJECTIVE
--------------------------------
          Morgan Stanley Dean Witter Developing Growth Securities Trust (the
          "Fund") seeks long-term capital growth.




[GRAPHIC OMITTED]


      PRINCIPAL INVESTMENT STRATEGIES
--------------------------------------------

                         The Fund will normally invest at least 65% of its
                         assets in common stocks (including depository
                         receipts) and other equity securities. In
                         deciding which of these securities to buy, hold or
                         sell, the Fund's "Investment Manager," Morgan Stanley
                         Dean Witter Advisors Inc., analyzes a company's
                         potential to grow much more rapidly than the economy.
                         The Fund's other equity securities may include
                         convertible securities and preferred stocks. The Fund
                         will invest primarily in smaller and medium-sized
                         companies. The Investment Manager focuses its
                         securities selection upon a diversified group of
                         emerging growth companies that have moved beyond the
                         difficult and extremely risky start-up phase and show
                         positive earnings with the prospects of achieving
                         significant further profit gains in at least the next
                         two-to-three years. The proportion of the Fund's
                         assets invested in particular industries will shift in
                         accordance with the Investment Manager's views of the
                         market, economy and political conditions. The Fund may
                         also invest in securities issued in initial public
                         offerings ("IPOs").

[sidebar]
CAPITAL GROWTH
An investment objective having the goal of selecting securities with the
potential to rise in price rather than pay out income.
[end sidebar]


          The Fund may invest up to 10% of its assets in foreign securities.
          This percentage limitation, however, does not apply to securities of
          foreign companies that are listed in the U.S. on a national
          securities exchange.


          Common stock is a share ownership or equity interest in a
          corporation. It may or may not pay dividends, as some companies
          reinvest all of their profits back into their businesses, while
          others pay out some of their profits to shareholders as dividends. A
          depository receipt is generally issued by a bank or financial
          institution and represents an ownership interest in the common stock
          or other equity securities of a foreign company.


          In addition, the Fund may invest in fixed-income securities issued or
          guaranteed by United States government, its agencies or
          instrumentalities, and investment grade debt securities.


          In pursuing the Fund's investment objective, the Investment Manager
          has considerable leeway in deciding which investments it buys, holds
          or sells on a day-to-day basis--and which trading strategies it uses.
          For example, the Investment Manager in its discretion may determine
          to use some permitted trading strategies while not using others.


                                                                               1


<PAGE>







[GRAPHIC OMITTED]


      PRINCIPAL RISKS
--------------------------
          There is no assurance that the Fund will achieve its investment
          objective. The Fund's share price will fluctuate with changes in the
          market value of the Fund's portfolio securities. When you sell Fund
          shares, they may be worth less than what you paid for them and,
          accordingly, you can lose money investing in this Fund.


          Common Stocks and Other Equity Securities. A principal risk of
          investing in the Fund is associated with its investments in common
          stocks and other equity securities. In general, stock and other
          equity security values fluctuate in response to activities specific
          to the company as well as general market, economic and political
          conditions. These prices can fluctuate widely.


          Small & Medium Capitalization Companies. The Fund's investments in
          smaller and medium-sized companies carry more risk than investments
          in larger companies. While some of the Fund's holdings in these
          companies may be listed on a national securities exchange, such
          securities are more likely to be traded in the over-the-counter
          market. The low market liquidity of these securities may have an
          adverse impact on the Fund's ability to sell certain securities at
          favorable prices and may also make it difficult for the Fund to
          obtain market quotations based on actual trades for purposes of
          valuing the Fund's securities. Investing in lesser-known, smaller and
          medium capitalization companies involves greater risk of volatility
          of the Fund's net asset value than is customarily associated with
          larger, more established companies. Often smaller and medium
          capitalization companies and the industries in which they are focused
          are still evolving and, while this may offer better growth potential
          than larger, more established companies, it also may make them more
          sensitive to changing market conditions.


          Convertible Securities. The Fund's investments in convertible
          securities subject the Fund to the risks associated with both
          fixed-income securities and common stocks. To the extent that a
          convertible security's investment value is greater than its
          conversion value, its price will be likely to increase when interest
          rates fall and decrease when interest rates rise, as with a
          fixed-income security. If the conversion value exceeds the investment
          value, the price of the convertible security will tend to fluctuate
          directly with the price of the underlying equity security. Because
          there are no credit quality restrictions concerning the Fund's
          convertible securities investments, these investments may be
          speculative in nature.



          Foreign Securities. The Fund's investments in foreign securities
          involve risks that are in addition to the risks associated with
          domestic securities. One additional risk is currency risk. While the
          price of Fund shares is quoted in U.S. dollars, the Fund generally
          converts U.S. dollars to a foreign market's local currency to
          purchase a security in that market. If the value of that local
          currency falls relative to the U.S. dollar, the U.S. dollar value of
          the foreign security will decrease. This is true even if the foreign
          security's local price remains unchanged.



2


<PAGE>






          Foreign securities (including depository receipts) also have risks
          related to economic and political developments abroad, including
          expropriations, confiscatory taxation, exchange control regulation,
          limitations on the use or transfer of Fund assets and any effects of
          foreign social, economic or political instability. Foreign companies,
          in general, are not subject to the regulatory requirements of U.S.
          companies and, as such, there may be less publicly available
          information about these companies. Moreover, foreign accounting,
          auditing and financial reporting standards generally are different
          from those applicable to U.S. companies. Finally, in the event of a
          default of any foreign debt obligations, it may be more difficult for
          the Fund to obtain or enforce a judgment against the issuers of the
          securities.


          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 U.S. counterparts. In addition, differences in
          clearance and settlement procedures in foreign markets may occasion
          delays in settlements of the Fund's trades effected in those markets
          and could result in losses to the Fund due to subsequent declines in
          the value of the securities subject to the trades.


          Shares of IPOs. Fund purchases of shares issued in IPOs expose the
          Fund to the additional risks associated with companies that have
          little operating history as public companies, as well as to the risks
          inherent in those sectors of the market where these new issuers
          operate. The market for IPO issuers has been volatile, and share
          prices of certain newly-public companies have fluctuated in
          significant amounts over short periods of time. In addition, the
          Investment Manager cannot guarantee continued access to IPOs.


          Other Risks. The performance of the Fund also will depend on whether
          the Investment Manager is successful in pursuing the Fund's
          investment strategy. The Fund is also subject to other risks from its
          permissible investments including the risks associated with
          fixed-income securities.



          Shares of the Fund are not bank deposits and are not guaranteed or
          insured by the FDIC or any other government agency.


                                                                               3


<PAGE>



[GRAPHIC OMITTED]


      PAST PERFORMANCE
----------------------------
          The bar chart and table below provide some indication of the risks of
          investing in the Fund. The Fund's past performance does not indicate
          how the Fund will perform in the future.


                          ANNUAL TOTAL RETURNS -- CALENDAR YEARS


                                     1990        -3.80%
                                     1991        48.17%
                                     1992        -2.54%
                                     1993        30.80%
                                     1994        -4.61%
                                     1995        47.69%
                                     1996        12.25%
                                     1997        13.34%
                                     1998         7.81%
                                     1999        98.98%



                                   The bar chart reflects the performance of
                                   Class B shares; the performance of the other
                                   Classes will differ because the Classes have
                                   different ongoing fees. The performance
                                   information in the bar chart does not reflect
                                   the deduction of sales charges; if these
                                   amounts were reflected, returns would be less
                                   than shown. Year-to-date total return as of
                                   September 30, 2000 was -12.64%.



[sidebar]
ANNUAL TOTAL RETURNS
This chart shows the performance of the Fund's Class B shares over the past
10 calendar years.
[end sidebar]

[sidebar]
AVERAGE ANNUAL
TOTAL RETURNS
This table compares the Fund's average annual total returns with those of a
broad measure of market performance over time. The Fund's returns include the
maximum applicable sales charge for each Class and assume you sold your shares
at the end of each period.
[end sidebar]




          During the periods shown in the bar chart, the highest return for a
          calendar quarter was 59.25% (quarter ended December 31, 1999) and the
          lowest return for a calendar quarter was -29.82% (quarter ended
          September 30, 1990).


             AVERAGE ANNUAL TOTAL RETURNS (AS OF DECEMBER 31, 1999)

--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                        PAST 1 YEAR     PAST 5 YEARS     PAST 10 YEARS
--------------------------------------------------------------------------------
<S>                      <C>             <C>              <C>
  Class A1                90.07%            --               --
--------------------------------------------------------------------------------
  Class B                 93.98%         32.02%           21.46%
--------------------------------------------------------------------------------
  Class C1                98.14%            --               --
--------------------------------------------------------------------------------
  Class D1               101.00%            --               --
--------------------------------------------------------------------------------
  Russell 2000 Index      21.26%         16.69%           13.40%
--------------------------------------------------------------------------------
</TABLE>



  1  Classes A, C and D commenced operations on July 28, 1997.
  2  The Russell 2000 Index is a capitalization-weighted index, which is
     comprised of the 2000 smallest stocks included in the Russell 2000 Index.
     The Index does not include any expenses, fees or charges. The Index is
     unmanaged and should not be considered an investment.


4

<PAGE>


[GRAPHIC OMITTED]


      FEES AND EXPENSES
-----------------------------
          The table below briefly describes the fees and expenses that you may
          pay if you buy and hold shares of the Fund. The Fund offers four
          Classes of shares: Classes A, B, C and D. Each Class has a different
          combination of fees, expenses and other features. The Fund does not
          charge account or exchange fees. See the "Share Class Arrangements"
          section for further fee and expense information.

<TABLE>
<CAPTION>
                                                     CLASS A      CLASS B      CLASS C     CLASS D
------------------------------------------------------------------------------------------------------
<S>                                               <C>          <C>          <C>          <C>
  SHAREHOLDER FEES
------------------------------------------------------------------------------------------------------
  Maximum sales charge (load) imposed on
  purchases (as a percentage of offering price)       5.25%(1)      None         None        None
------------------------------------------------------------------------------------------------------
  Maximum deferred sales charge (load) (as a
  percentage based on the lesser of the offering
  price or net asset value at redemption)              None(2)     5.00%(3)        1.00%(4)  None
------------------------------------------------------------------------------------------------------
  ANNUAL FUND OPERATING EXPENSES
------------------------------------------------------------------------------------------------------
  Management fee                                      0.49%        0.49%         0.49%       0.49%
------------------------------------------------------------------------------------------------------
  Distribution and service (12b-1) fees               0.24%        1.00%         1.00%       None
------------------------------------------------------------------------------------------------------
  Other expenses                                      0.12%        0.12%         0.12%       0.12%
------------------------------------------------------------------------------------------------------
  Total annual Fund operating expenses                0.85%        1.61%         1.61%       0.61%
------------------------------------------------------------------------------------------------------
</TABLE>


1  Reduced for purchases of $25,000 and over.

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 if you sell
   your shares within one year after purchase, except for certain
   specific circumstances.

3  The CDSC is scaled down to 1.00% during the sixth year, reaching zero
   thereafter. See "Share Class Arrangements" for a complete discussion of the
   CDSC.

4  Only applicable if you sell your shares within one year after purchase.


[sidebar]
SHAREHOLDER FEES
These fees are paid directly from
your investment.
[end sidebar]

[sidebar]
ANNUAL FUND
OPERATING EXPENSES
These expenses are deducted
from the Fund's assets and
are based on expenses paid
for the fiscal year ended
September 30, 2000.
[end sidebar]

          EXAMPLE

          This example is intended to help you compare the cost of investing in
          the Fund with the cost of investing in other mutual funds.

          The example assumes that you invest $10,000 in the Fund, your
          investment has a 5% return each year, and the Fund's operating
          expenses remain the same. Although your actual costs may be higher or
          lower, the tables below show your costs at the end of each period
          based on these assumptions depending upon whether or not you sell
          your shares at the end of each period.




<TABLE>
<CAPTION>
                   IF YOU SOLD YOUR SHARES:                IF YOU HELD YOUR SHARES:
            --------------------------------------- --------------------------------------
             1 YEAR   3 YEARS   5 YEARS   10 YEARS   1 YEAR   3 YEARS   5 YEARS   10 YEARS
            --------------------------------------  --------------------------------------
<S>         <C>      <C>       <C>       <C>        <C>      <C>       <C>       <C>
  CLASS A     $607      $782    $  972     $1,519     $607      $782      $972    $1,519
-------------------------------------------------   --------------------------------------
  CLASS B     $664      $808    $1,076     $1,911     $164      $508      $876    $1,911
-------------------------------------------------   --------------------------------------
  CLASS C     $264      $508    $  876     $1,911     $164      $508      $876    $1,911
-------------------------------------------------   --------------------------------------
  CLASS D     $ 62      $195    $  340     $  762     $ 62      $195      $340    $  762
-------------------------------------------------   --------------------------------------
</TABLE>


                                                                               5

<PAGE>




          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.




[GRAPHIC OMITTED]


      ADDITIONAL INVESTMENT STRATEGY INFORMATION
---------------------------------------------------------
          This section provides additional information relating to the Fund's
          principal investment strategies.


          Fixed-Income Securities. The Fund may invest up to 35% of its total
          assets in fixed-income securities issued or guaranteed by the United
          States government, its agencies or instrumentalities, and corporate
          debt securities rated Baa or better by Moody's Investors Service or
          BBB or better by Standard & Poor's or, if not rated, judged to be of
          comparable quality by the Investment Manager.


          Defensive Investing. The Fund may take temporary "defensive"
          positions in attempting to respond to adverse market conditions. The
          Fund may invest any amount of its assets in cash or money market
          instruments in a defensive posture when the Investment Manager
          believes it is advisable to do so. Although taking a defensive
          posture is designed to protect the Fund from an anticipated market
          downturn, it could have the effect of reducing the benefit from any
          upswing in the market. When the Fund takes a defensive position, it
          may not achieve its investment objective.


          Portfolio Turnover. The Fund may engage in active and frequent
          trading of its portfolio securities. The Financial Highlights Table
          at the end of this Prospectus shows the Fund's portfolio turnover
          rates during recent fiscal years. A portfolio turnover rate of 200%,
          for example, is equivalent to the Fund buying and selling all of its
          securities two times during the course of the year. A high portfolio
          turnover rate (over 100%) could result in high brokerage costs and an
          increase in taxable capital gains distributions to the Fund's
          shareholders. See the sections on "Distributions" and "Tax
          Consequences."


          The percentage limitations relating to the composition of the Fund's
          portfolio apply at the time the Fund acquires an investment and refer
          to the Fund's net assets, unless otherwise noted. Subsequent
          percentage changes that result from market fluctuations will not
          require the Fund to sell any portfolio security. The Fund may change
          its principal investment strategies without shareholder approval;
          however, you would be notified of any changes.



6


<PAGE>






[GRAPHIC OMITTED]


      ADDITIONAL RISK INFORMATION
----------------------------------------
          This section provides additional information relating to the
          principal risks of investing in the Fund.



          Fixed-Income Securities. Principal risks of investing in the Fund are
          also associated with its fixed-income securities. All fixed-income
          securities are subject to two types of risk: credit risk and interest
          rate risk. Credit risk refers to the possibility that the issuer of a
          security will be unable to make interest payments and/or repay the
          principal on its debt. Interest rate risk refers to fluctuations in
          the value of a fixed-income security resulting from changes in the
          general level of interest rates. When the general level of interest
          rates goes up, the prices of most fixed-income securities go down.
          When the general level of interest rates goes down, the prices of
          most fixed-income securities go up. Accordingly, a rise in the
          general level of interest rates may cause the price of the Fund's
          fixed-income securities to fall substantially. Fixed-income
          securities rated Baa by Moody's Investors Service or BBB by Standard
          & Poor's have speculative characteristics.




[GRAPHIC OMITTED]


       FUND MANAGEMENT

----------------------------
                         The Fund has retained the Investment Manager -- Morgan
                         Stanley Dean Witter Advisors Inc. -- to provide
                         administrative services, manage its business affairs
                         and invest its assets, including the placing of orders
                         for the purchase and sale of portfolio securities.
                         The Investment Manager is a wholly-owned subsidiary
                         of Morgan Stanley Dean Witter & Co., a preeminent
                         global financial services firm that maintains leading
                         market positions in each of its three primary
                         businesses: securities, asset management and credit
                         services. Its main business office is located at Two
                         World Trade Center, New York, NY 10048.


[sidebar]
MORGAN STANLEY DEAN WITTER ADVISORS INC.
The Investment Manager is widely recognized as a leader in the mutual fund
industry and together with Morgan Stanley Dean Witter Services Company Inc.,
its wholly-owned subsidiary, had approximately $155 billion in assets under
management as of October 31, 2000.
[end sidebar]


                         The Fund's portfolio is managed within the Investment
                         Manager's Growth Group. Armon Bar-Tur, a Vice
                         President of the Investment Manager, has been the
                         Fund's primary portfolio manager since July 1999. Mr.
                         Bar-Tur has been a portfolio manager with the
                         Investment Manager since October 1996, prior to which
                         time he was a research analyst with Merrill Lynch
                         Asset Management. Co-management has been provided by
                         John Roscoe, a Vice President of the Investment
                         Manager, since May 2000. Mr. Roscoe has been a
                         portfolio manager with the Investment Manager since
                         December 1997, prior to which time he was an equity
                         analyst at Rockefeller and Company, Inc.


          The Fund pays the Investment Manager a monthly management fee as full
          compensation for the services and facilities furnished to the Fund,
          and for Fund expenses assumed by the Investment Manager. The fee is
          based on the Fund's average daily net assets. For the fiscal year
          ended September 30, 2000, the Fund accrued total compensation to the
          Investment Manager amounting to 0.49% of the Fund's average daily net
          assets.



                                                                               7

<PAGE>




SHAREHOLDER INFORMATION


[GRAPHIC OMITTED]


       PRICING FUND SHARES
-------------------------------
          The price of Fund shares (excluding sales charges), called "net asset
          value," is based on the value of the Fund's portfolio securities.
          While the assets of each Class are invested in a single portfolio of
          securities, the net asset value of each Class will differ because the
          Classes have different ongoing distribution fees.


          The net asset value per share of the Fund is determined once daily at
          4:00 p.m. Eastern 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). Shares will not be priced on days
          that the New York Stock Exchange is closed.



          The value of the Fund's portfolio securities is based on the
          securities' market price when available. When a market price is not
          readily available, including circumstances under which the Investment
          Manager determines that a security's market price is not accurate, a
          portfolio security is valued at its fair value, as determined under
          procedures established by the Fund's Board of Trustees. In these
          cases, the Fund's net asset value will reflect certain portfolio
          securities' fair value rather than their market price. With respect
          to securities that are primarily listed on foreign exchanges, the
          value of the Fund's portfolio securities may change on days when you
          will not be able to purchase or sell your shares.



          An exception to the Fund's general policy of using market prices
          concerns its short-term debt portfolio securities. Debt securities
          with remaining maturities of sixty days or less at the time of
          purchase are valued at amortized cost. However, if the cost does not
          reflect the securities' market value, these securities will be valued
          at their fair value.




[GRAPHIC OMITTED]


      HOW TO BUY SHARES
------------------------------
                         You may open a new account to buy Fund shares or buy
                         additional Fund shares for an existing account by
                         contacting your Morgan Stanley Dean Witter Financial
                         Advisor or other authorized financial representative.
                         Your Financial Advisor will assist you, step-by-step,
                         with the procedures to invest in the Fund. You may also
                         purchase shares directly by calling the Fund's transfer
                         agent and requesting an application.



[sidebar]
CONTACTING A FINANCIAL ADVISOR
If you are new to the Morgan Stanley Dean Witter Family of Funds and would like
to contact a Financial Advisor, call (877) 937-MSDW (toll-free) for the
telephone number of the Morgan Stanley Dean Witter office nearest you. You may
also access our office locator on our Internet site at:
www.msdwadvice.com/funds
[end sidebar]


                         Because every investor has different immediate
                         financial needs and long-term investment goals, the
                         Fund offers investors four Classes of shares: Classes
                         A, B, C and D. Class D shares are only offered to a
                         limited group of investors. Each Class of shares
                         offers a distinct structure of sales charges,
                         distribution and service fees, and other features that
                         are designed to address a variety of needs. Your
                         Financial Advisor or other authorized financial
                         representative can


8

<PAGE>



          help you decide which Class may be most appropriate for you. When
          purchasing Fund shares, you must specify which Class of shares you
          wish to purchase.


          When you buy Fund shares, the shares are purchased at the next share
          price calculated (less any applicable front-end sales charge for
          Class A shares) after we receive your purchase order. Your payment is
          due on the third business day after you place your purchase order. We
          reserve the right to reject any order for the purchase of Fund
          shares.


                          MINIMUM INVESTMENT AMOUNTS
--------------------------------------------------------------------------------

<TABLE>
<CAPTION>
----------------------------------------------------------------------------------------
                                                                 MINIMUM INVESTMENT
                                                           -----------------------------
INVESTMENT OPTIONS                                          INITIAL           ADDITIONAL
----------------------------------------------------------------------------------------
<S>                                    <C>                <C>             <C>
  Regular Accounts                                           $1,000             $100
----------------------------------------------------------------------------------------
  Individual Retirement Accounts:        Regular IRAs        $1,000             $100
                                         Education IRAs      $  500             $100
----------------------------------------------------------------------------------------
  EasyInvest(Service Mark)
  (Automatically from your checking
  or savings account or Money
  Market Fund)                                               $  100*            $100*
----------------------------------------------------------------------------------------
</TABLE>

  *  Provided your schedule of investments totals $1,000 in twelve months.


[sidebar]
EASYINVEST(SERVICE MARK)
A purchase plan that allows you to transfer money automatically from your
checking or savings account or from a Money Market Fund on a semi-monthly,
monthly or quarterly basis. Contact your Morgan Stanley Dean Witter Financial
Advisor for further information about this service.
[end sidebar]



          There is no minimum investment amount if you purchase Fund shares
          through: (1) the Investment Manager's mutual fund asset allocation
          plan, (2) a program, approved by the Fund's distributor, in which you
          pay an asset-based fee for advisory, administrative and/or brokerage
          services, (3) the following programs approved by the Fund's
          distributor: (i) qualified state tuition plans described in Section
          529 of the Internal Revenue Code and (ii) certain other investment
          programs that do not charge an asset-based fee, or (4)
          employer-sponsored employee benefit plan accounts.



          Investment Options for Certain Institutional and Other
          Investors/Class D Shares. To be eligible to purchase Class D shares,
          you must qualify under one of the investor categories specified in
          the "Share Class Arrangements" section of this Prospectus.


          Subsequent Investments Sent Directly to the Fund. In addition to
          buying additional Fund shares for an existing account by contacting
          your Morgan Stanley Dean Witter Financial Advisor, you may send a
          check directly to the Fund. To buy additional shares in this manner:

           o Write a "letter of instruction" to the Fund specifying the
             name(s) on the account, the account number, the social security or
             tax identification number, the Class of shares you wish to purchase
             and the investment amount (which would include any applicable
             front-end sales charge). The letter must be signed by the account
             owner(s).


                                                                               9


<PAGE>



           o Make out a check for the total amount payable to: Morgan Stanley
             Dean Witter Developing Growth Securities Trust.


           o Mail the letter and check to Morgan Stanley Dean Witter Trust FSB
             at P.O. Box 1040, Jersey City, NJ 07303.



[GRAPHIC OMITTED]




      HOW TO EXCHANGE SHARES
------------------------------------
          Permissible Fund Exchanges. You may exchange shares of any Class of
          the Fund for the same Class of any other continuously offered
          Multi-Class Fund, or for shares of a No-Load Fund, a Money Market
          Fund, North American Government Income Trust or Short-Term U.S.
          Treasury Trust, without the imposition of an exchange fee. In
          addition, Class A shares of the Fund may be exchanged for shares of
          an FSC Fund (funds subject to a front-end sales charge). See the
          inside back cover of this Prospectus for each Morgan Stanley Dean
          Witter Fund's designation as a Multi-Class Fund, No- Load Fund, Money
          Market Fund or FSC Fund. If a Morgan Stanley Dean Witter Fund is not
          listed, consult the inside back cover of that fund's prospectus for
          its designation.


          Exchanges may be made after shares of the fund acquired by purchase
          have been held for thirty days. There is no waiting period for
          exchanges of shares acquired by exchange or dividend reinvestment.
          The current prospectus for each fund describes its investment
          objective(s), policies and investment minimums, and should be read
          before investment. Since exchanges are available only into
          continuously offered Morgan Stanley Dean Witter Funds, exchanges are
          not available into any new Morgan Stanley Dean Witter Fund during its
          initial offering period, or when shares of a particular Morgan
          Stanley Dean Witter Fund are not being offered for purchase.



          Exchange Procedures. You can process an exchange by contacting your
          Morgan Stanley Dean Witter Financial Advisor or other authorized
          financial representative. Otherwise, you must forward an exchange
          privilege authorization form to the Fund's transfer agent -- Morgan
          Stanley Dean Witter Trust FSB -- and then write the transfer agent or
          call (800) 869-NEWS to place an exchange order. You can obtain an
          exchange privilege authorization form by contacting your Financial
          Advisor or other authorized financial representative or by calling
          (800) 869-NEWS. If you hold share certificates, no exchanges may be
          processed until we have received all applicable share certificates.



          An exchange to any Morgan Stanley Dean Witter Fund (except a Money
          Market Fund) is made on the basis of the next calculated net asset
          values of the funds involved after the exchange instructions are
          accepted. When exchanging into a Money Market Fund, the Fund's shares
          are sold at their next calculated net asset value and the Money
          Market Fund's shares are purchased at their net asset value on the
          following business day.



          The Fund may terminate or revise the exchange privilege upon required
          notice. The check writing privilege is not available for Money Market
          Fund shares you acquire in an exchange.


10


<PAGE>






          Telephone Exchanges. For your protection when calling Morgan Stanley
          Dean Witter Trust FSB, we will employ reasonable procedures to
          confirm that exchange instructions communicated over the telephone
          are genuine. These procedures may include requiring various forms of
          personal identification such as name, mailing address, social
          security or other tax identification number. Telephone instructions
          also may be recorded.


          Telephone instructions will be accepted if received by the Fund's
          transfer agent between 9:00 a.m. and 4:00 p.m. Eastern time on any
          day the New York Stock Exchange is open for business. 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 case with the Fund in the past.


          Margin Accounts. If you have pledged your Fund shares in a margin
          account, contact your Morgan Stanley Dean Witter Financial Advisor or
          other authorized financial representative regarding restrictions on
          the exchange of such shares.



          Tax Considerations of Exchanges. If you exchange shares of the Fund
          for shares of another Morgan Stanley Dean Witter Fund, there are
          important tax considerations. For tax purposes, the exchange out of
          the Fund is considered a sale of Fund shares -- and the exchange into
          the other fund is considered a purchase. As a result, you may realize
          a capital gain or loss.



          You should review the "Tax Consequences" section and consult your own
          tax professional about the tax consequences of an exchange.



          Limitations on Exchanges. Certain patterns of past exchanges and/or
          purchase or sale transactions involving the Fund or other Morgan
          Stanley Dean Witter Funds may result in the Fund limiting or
          prohibiting, at its discretion, additional purchases and/or
          exchanges. Determinations in this regard may be made based on the
          frequency or dollar amount of the previous exchanges or purchase or
          sale transactions. You will be notified in advance of limitations on
          your exchange privileges.



          CDSC Calculations on Exchanges. See the "Share Class Arrangements"
          section of this Prospectus for a further discussion of how applicable
          contingent deferred sales charges (CDSCs) are calculated for shares
          of one Morgan Stanley Dean Witter Fund that are exchanged for shares
          of another.


          For further information regarding exchange privileges, you should
          contact your Morgan Stanley Dean Witter Financial Advisor or call
          (800) 869-NEWS.


                                                                              11


<PAGE>






[GRAPHIC OMITTED]


      HOW TO SELL SHARES
-------------------------------
          You can sell some or all of your Fund shares at any time. If you sell
          Class A, Class B or Class C shares, your net sale proceeds are
          reduced by the amount of any applicable CDSC. Your shares will be
          sold at the next price calculated after we receive your order to sell
          as described below.


<TABLE>
<CAPTION>
OPTIONS               PROCEDURES
--------------------- -----------------------------------------------------------------------------------------------
<S>                   <C>
  Contact Your        To sell your shares, simply call your Morgan Stanley Dean Witter Financial Advisor or other
  Financial Advisor   authorized financial representative.
[GRAPHIC OMITTED]     -----------------------------------------------------------------------------------------------
                      Payment will be sent to the address to which the account is registered or deposited in your
                      brokerage account.
---------------------------------------------------------------------------------------------------------------------
  By Letter           You can also sell your shares by writing a "letter of instruction" that includes:
[GRAPHIC OMITTED]       o  your account number;
                        o  the dollar amount or the number of shares you wish to sell;
                        o  the Class of shares you wish to sell; and
                        o  the signature of each owner as it appears on the account.
---------------------------------------------------------------------------------------------------------------------
                      If you are requesting payment to anyone other than the registered owner(s) or that payment
                      be sent to any address other than the address of the registered owner(s) or pre-designated
                      bank account, you will need a signature guarantee. You can obtain a signature guarantee from
                      an eligible guarantor acceptable to Morgan Stanley Dean Witter Trust FSB. (You should
                      contact Morgan Stanley Dean Witter Trust FSB at (800) 869-NEWS for a determination as to
                      whether a particular institution is an eligible guarantor.) A notary public cannot provide a
                      signature guarantee. Additional documentation may be required for shares held by a
                      corporation, partnership, trustee or executor.
                      -----------------------------------------------------------------------------------------------
                      Mail the letter to Morgan Stanley Dean Witter Trust FSB at P.O. Box 983, Jersey City, NJ
                      07303. If you hold share certificates, you must return the certificates, along with the letter
                      and any required additional documentation.
                      -----------------------------------------------------------------------------------------------
                      A check will be mailed to the name(s) and address in which the account is registered, or
                      otherwise according to your instructions.
---------------------------------------------------------------------------------------------------------------------
  Systematic          If your investment in all of the Morgan Stanley Dean Witter Family of Funds has a total
  Withdrawal Plan     market value of at least $10,000, you may elect to withdraw amounts of $25 or more, or in
[GRAPHIC OMITTED]     any whole percentage of a fund's balance (provided the amount is at least $25), on a monthly,
                      quarterly, semi-annual or annual basis, from any fund with a balance of at least $1,000. Each
                      time you add a fund to the plan, you must meet the plan requirements.
                      -----------------------------------------------------------------------------------------------
                      Amounts withdrawn are subject to any applicable CDSC. A CDSC may be waived under
                      certain circumstances. See the Class B waiver categories listed in the "Share Class
                      Arrangements" section of this Prospectus.
                      -----------------------------------------------------------------------------------------------
                      To sign up for the Systematic Withdrawal Plan, contact your Morgan Stanley Dean Witter
                      Financial Advisor or call (800) 869-NEWS. You may terminate or suspend your plan at any
                      time. Please remember that withdrawals from the plan are sales of shares, not Fund
                      "distributions," and ultimately may exhaust your account balance. The Fund may terminate or
                      revise the plan at any time.
---------------------------------------------------------------------------------------------------------------------
</TABLE>




12

<PAGE>





          Payment for Sold Shares. After we receive your complete instructions
          to sell as described above, a check will be mailed to you within
          seven days, although we will attempt to make payment within one
          business day. Payment may also be sent to your brokerage account.


          Payment may be postponed or the right to sell your shares suspended
          under unusual circumstances. If you request to sell shares that were
          recently purchased by check, your sale will not be effected until it
          has been verified that the check has been honored.


          Tax Considerations. Normally, your sale of Fund shares is subject to
          federal and state income tax. You should review the "Tax
          Consequences" section of this Prospectus and consult your own tax
          professional about the tax consequences of a sale.


          Reinstatement Privilege. If you sell Fund shares and have not
          previously exercised the reinstatement privilege, you may, within 35
          days after the date of sale, invest any portion of the proceeds in
          the same Class of Fund shares at their net asset value and receive a
          pro rata credit for any CDSC paid in connection with the sale.


          Involuntary Sales. The Fund reserves the right, on sixty days'
          notice, to sell the shares of any shareholder (other than shares held
          in an IRA or 403(b) Custodial Account) whose shares, due to sales by
          the shareholder, have a value below $100, or in the case of an
          account opened through EasyInvestSM, if after 12 months the
          shareholder has invested less than $1,000 in the account.


          However, before the Fund sells your shares in this manner, we will
          notify you and allow you sixty days to make an additional investment
          in an amount that will increase the value of your account to at least
          the required amount before the sale is processed. No CDSC will be
          imposed on any involuntary sale.


          Margin Accounts. If you have pledged your Fund shares in a margin
          account, contact your Morgan Stanley Dean Witter Financial Advisor or
          other authorized financial representative regarding restrictions on
          the sale of such shares.


                                                                              13

<PAGE>






[GRAPHIC OMITTED]


      DISTRIBUTIONS
------------------------
                         The Fund passes substantially all of its earnings from
                         income and capital gains along to its investors as
                         "distributions." The Fund earns income from stocks and
                         interest from fixed-income investments. These amounts
                         are passed along to Fund shareholders as "income
                         dividend distributions." The Fund realizes capital
                         gains whenever it sells securities for a higher price
                         than it paid for them. These amounts may be passed
                         along as "capital gain distributions."


[sidebar]
TARGETED DIVIDENDS(SERVICE MARK)
You may select to have your Fund distributions automatically invested in other
Classes of Fund shares or Classes of another Morgan Stanley Dean Witter Fund
that you own. Contact your Morgan Stanley Dean Witter Financial Advisor for
further information about this service.
[end sidebar]

                         The Fund declares income dividends separately for each
                         Class. Distributions paid on Class A and Class D
                         shares usually will be higher than for Class B and
                         Class C because distribution fees that Class B and
                         Class C pay are higher. Normally, income dividends are
                         distributed to shareholders annually. Capital gains,
                         if any, are usually distributed in December. The Fund,
                         however, may retain and reinvest any long-term capital
                         gains. The Fund may at times make payments from
                         sources other than income or capital gains that
                         represent a return of a portion of your investment.



          Distributions are reinvested automatically in additional shares of
          the same Class and automatically credited to your account, unless you
          request in writing that all distributions be paid in cash. If you
          elect the cash option, the Fund will mail a check to you no later
          than seven business days after the distribution is declared. However,
          if you purchase Fund shares through a Financial Advisor within three
          business days prior to the record date for the distribution, the
          distribution will automatically be paid to you in cash, even if you
          did not request to receive all distributions in cash. No interest
          will accrue on uncashed checks. If you wish to change how your
          distributions are paid, your request should be received by the Fund's
          transfer agent, Morgan Stanley Dean Witter Trust FSB, at least five
          business days prior to the record date of the distributions.





[GRAPHIC OMITTED]


       TAX CONSEQUENCES
----------------------------
          As with any investment, you should consider how your Fund investment
          will be taxed. The tax information in this Prospectus is provided as
          general information. You should consult your own tax professional
          about the tax consequences of an investment in the Fund.


          Unless your investment in the Fund is through a tax-deferred
          retirement account, such as a 401(k) plan or IRA, you need to be
          aware of the possible tax consequences when:

           o  The Fund makes distributions; and

           o  You sell Fund shares, including an exchange to another Morgan
              Stanley Dean Witter Fund.


14


<PAGE>



          Taxes on Distributions. Your distributions are normally subject to
          federal and state income tax when they are paid, whether you take
          them in cash or reinvest them in Fund shares. A distribution also may
          be subject to local income tax. Any income dividend distributions and
          any short-term capital gain distributions are taxable to you as
          ordinary income. Any long-term capital gain distributions are taxable
          as long-term capital gains, no matter how long you have owned shares
          in the Fund.



          Every January, you will be sent a statement (IRS Form 1099-DIV)
          showing the taxable distributions paid to you in the previous year.
          The statement provides information on your dividends and capital
          gains for tax purposes.



          Taxes on Sales. Your sale of Fund shares normally is subject to
          federal and state income tax and may result in a taxable gain or loss
          to you. A sale also may be subject to local income tax. Your exchange
          of Fund shares for shares of another Morgan Stanley Dean Witter Fund
          is treated for tax purposes like a sale of your original shares and a
          purchase of your new shares. Thus, the exchange may, like a sale,
          result in a taxable gain or loss to you and will give you a new tax
          basis for your new shares.


          When you open your Fund account, you should provide your social
          security or tax identification number on your investment application.
          By providing this information, you will avoid being subject to a
          federal backup withholding tax of 31% on taxable distributions and
          redemption proceeds. Any withheld amount would be sent to the IRS as
          an advance tax payment.



[GRAPHIC OMITTED]


       SHARE CLASS ARRANGEMENTS
--------------------------------------
          The Fund offers several Classes of shares having different
          distribution arrangements designed to provide you with different
          purchase options according to your investment needs. Your Morgan
          Stanley Dean Witter Financial Advisor or other authorized financial
          representative can help you decide which Class may be appropriate for
          you.


          The general public is offered three Classes: Class A shares, Class B
          shares and Class C shares, which differ principally in terms of sales
          charges and ongoing expenses. A fourth Class, Class D shares, is
          offered only to a limited category of investors. Shares that you
          acquire through reinvested distributions will not be subject to any
          front-end sales charge or CDSC -- contingent deferred sales charge.
          Sales personnel may receive different compensation for selling each
          Class of shares. The sales charges applicable to each Class provide
          for the distribution financing of shares of that Class.


                                                                              15


<PAGE>





          The chart below compares the sales charge and annual 12b-1 fee
          applicable to each Class:


<TABLE>
<CAPTION>
                                                                                                 MAXIMUM
CLASS     SALES CHARGE                                                                       ANNUAL 12B-1 FEE
---------------------------------------------------------------------------------------------------------------
<S>       <C>                                                                               <C>
  A       Maximum 5.25% initial sales charge reduced for purchase of $25,000 or more;
          shares sold without an initial sales charge are generally subject to a 1.0% CDSC
          during the first year                                                                    0.25%
---------------------------------------------------------------------------------------------------------------
  B       Maximum 5.0% CDSC during the first year decreasing to 0% after six years                  1.0%
---------------------------------------------------------------------------------------------------------------
  C       1.0% CDSC during the first year                                                           1.0%
---------------------------------------------------------------------------------------------------------------
  D       None                                                                                      None
---------------------------------------------------------------------------------------------------------------
</TABLE>


          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 purchases of $25,000 or more according to the schedule
          below. Investments of $1 million or more are not subject to an initial
          sales charge, but are generally subject to a contingent deferred sales
          charge, or CDSC, of 1.0% on sales made within one year after the last
          day of the month of purchase. The CDSC will be assessed in the same
          manner and with the same CDSC waivers as with Class B shares. Class A
          shares are also subject to a distribution (12b-1) fee of up to 0.25%
          of the average daily net assets of the Class.

          The offering price of Class A shares includes a sales charge
          (expressed as a percentage of the offering price) on a single
          transaction as shown in the following table:

<TABLE>
<CAPTION>
                                                   FRONT-END SALES CHARGE
                                      -----------------------------------------------
                                           PERCENTAGE OF       APPROXIMATE PERCENTAGE
AMOUNT OF SINGLE TRANSACTION           PUBLIC OFFERING PRICE   OF NET AMOUNT 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>


[sidebar]
FRONT-END SALES CHARGE OR FSC
An initial sales charge you pay when purchasing Class A shares that is based on
a percentage of the offering price. The percentage declines based upon the
dollar value of Class A shares you purchase. We offer three ways to reduce your
Class A sales charges -- the Combined Purchase Privilege, Right of Accumulation
and Letter of Intent.
[end sidebar]


16




<PAGE>




          The reduced sales charge schedule is applicable to purchases of Class
          A shares in a single transaction by:

           o  A single account (including an individual, trust or fiduciary
              account).

           o  Family member accounts (limited to husband, wife and children
              under the age of 21).

           o  Pension, profit sharing or other employee benefit plans of
              companies and their affiliates.

           o  Tax-exempt organizations.

           o  Groups organized for a purpose other than to buy mutual fund
              shares.


          Combined Purchase Privilege. You also will have the benefit of
          reduced sales charges by combining purchases of Class A shares of the
          Fund in a single transaction with purchases of Class A shares of
          other Multi-Class Funds and shares of FSC Funds.



          Right of Accumulation. You also may benefit from a reduction of sales
          charges if the cumulative net asset value of Class A shares of the
          Fund purchased in a single transaction, together with shares of other
          funds you currently own which were previously purchased at a price
          including a front-end sales charge (including shares acquired through
          reinvestment of distributions), amounts to $25,000 or more. Also, if
          you have a cumulative net asset value of all your Class A and Class D
          shares equal to at least $5 million (or $25 million for certain
          employee benefit plans), you are eligible to purchase Class D shares
          of any fund subject to the Fund's minimum initial investment
          requirement.


          You must notify your Morgan Stanley Dean Witter Financial Advisor or
          other authorized financial representative (or Morgan Stanley Dean
          Witter Trust FSB if you purchase directly through the Fund), at the
          time a purchase order is placed, that the purchase qualifies for the
          reduced sales charge under the Right of Accumulation. Similar
          notification must be made in writing when an order is placed by mail.
          The reduced sales charge will not be granted if: (i) notification is
          not furnished at the time of the order; or (ii) a review of the
          records of Dean Witter Reynolds or other authorized dealer of Fund
          shares or the Fund's transfer agent does not confirm your represented
          holdings.


          Letter of Intent. The schedule of reduced sales charges for larger
          purchases also will be available to you if you enter into a written
          "letter of intent." A letter of intent provides for the purchase of
          Class A shares of the Fund or other Multi-Class Funds or shares of
          FSC Funds within a thirteen-month period. The initial purchase under
          a letter of intent must be at least 5% of the stated investment goal.
          To determine the applicable sales charge reduction, you may also
          include: (1) the cost of 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
          distributor receiving the letter of intent, and (2) the cost of
          shares of other funds you currently own acquired in exchange



                                                                              17


<PAGE>




          for shares of funds purchased during that period at a price including
          a front-end sales charge. You can obtain a letter of intent by
          contacting your Morgan Stanley Dean Witter Financial Advisor or other
          authorized financial representative, or by calling (800) 869-NEWS. If
          you do not achieve the stated investment goal within the
          thirteen-month period, you are required to pay the difference between
          the sales charges otherwise applicable and sales charges actually
          paid, which may be deducted from your investment.



          Other Sales Charge Waivers. In addition to investments of $1 million
          or more, your purchase of Class A shares is not subject to a
          front-end sales charge (or a CDSC upon sale) if your account
          qualifies under one of the following categories:

           o A trust for which Morgan Stanley Dean Witter Trust FSB provides
             discretionary trustee services.

           o Persons participating in a fee-based investment program (subject
             to all of its terms and conditions, including termination fees,
             mandatory sale or transfer restrictions on termination) approved by
             the Fund's distributor pursuant to which they pay an asset-based
             fee for investment advisory, administrative and/or brokerage
             services.


           o Qualified state tuition plans described in Section 529 of the
             Internal Revenue Code (subject to all applicable terms and
             conditions) and certain other investment programs that do not
             charge an asset-based fee and have been approved by the Fund's
             distributor.

           o Employer-sponsored employee benefit plans, whether or not
             qualified under the Internal Revenue Code, for which Morgan Stanley
             Dean Witter Trust FSB serves as trustee or Morgan Stanley Dean
             Witter's Retirement Plan Services serves as recordkeeper under a
             written Recordkeeping Services Agreement ("MSDW Eligible Plans")
             which have at least 200 eligible employees.

           o An MSDW Eligible Plan whose Class B shares have converted to
             Class A shares, regardless of the plan's asset size or number of
             eligible employees.


           o A client of a Morgan Stanley Dean Witter Financial Advisor who
             joined us from another investment firm within six months prior to
             the date of purchase of Fund shares, and you used the proceeds from
             the sale of shares of a proprietary mutual fund of that Financial
             Advisor's previous firm that imposed either a front-end or deferred
             sales charge to purchase Class A shares, provided that: (1) you
             sold the shares not more than 60 days prior to the purchase of Fund
             shares, and (2) the sale proceeds were maintained in the interim in
             cash or a money market fund.

           o Current or retired Directors/Trustees of the Morgan Stanley Dean
             Witter Funds, such persons' spouses and children under the age of
             21, and trust accounts for which any of such persons is a
             beneficiary.


18

<PAGE>



           o Current or retired directors, officers and employees of Morgan
             Stanley Dean Witter & Co. and any of its subsidiaries, such
             persons' spouses and children under the age of 21, and trust
             accounts for which any of such persons is a beneficiary.


CLASS B SHARES Class B shares are offered at net asset value with no initial
sales charge but are subject to a contingent deferred sales charge, or CDSC, as
set forth in the table below. For the purpose of calculating the CDSC, shares
are deemed to have been purchased on the last day of the month during which they
were purchased.



<TABLE>
<CAPTION>


                                    CDSC AS A PERCENTAGE
YEAR SINCE PURCHASE PAYMENT MADE     OF 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>

[sidebar]
CONTINGENT DEFERRED SALES CHARGE OR CDSC
A fee you pay when you sell shares of certain Morgan Stanley Dean Witter Funds
purchased without an initial sales charge. This fee declines the longer you hold
your shares as set forth in the table.
[end sidebar]

          Each time you place an order to sell or exchange shares, shares with
          no CDSC will be sold or exchanged first, then shares with the lowest
          CDSC will be sold or exchanged next. For any shares subject to a
          CDSC, the CDSC will be assessed on an amount equal to the lesser of
          the current market value or the cost of the shares being sold.


          CDSC Waivers. A CDSC, if otherwise applicable, will be waived in the
          case of:

           o Sales of shares held at the time you die or become disabled
             (within the definition in Section 72(m)(7) of the Internal Revenue
             Code which relates to the ability to engage in gainful employment),
             if the shares are: (i) registered either in your name (not a trust)
             or in the names of you and your spouse as joint tenants with right
             of survivorship; or (ii) held in a qualified corporate or
             self-employed retirement plan, IRA or 403(b) Custodial Account,
             provided in either case that the sale is requested within one year
             of your death or initial determination of disability.


           o Sales in connection with the following retirement plan
             "distributions:" (i) 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 591/2); (ii) distributions from
             an IRA or 403(b) Custodial Account following attainment of age
             591/2; or (iii) a tax-free return of an excess IRA contribution (a
             "distribution" does not include a direct transfer of IRA, 403(b)
             Custodial Account or retirement plan assets to a successor
             custodian or trustee).



                                                                              19

<PAGE>



           o Sales of shares held for you as a participant in an MSDW Eligible
             Plan.

           o Sales of shares in connection with the Systematic Withdrawal Plan
             of up to 12% annually of the value of each fund from which plan
             sales are made. The percentage is determined on the date you
             establish the Systematic Withdrawal Plan and based on the next
             calculated share price. You may have this CDSC waiver applied in
             amounts up to 1% per month, 3% per quarter, 6% semi-annually or 12%
             annually. Shares with no CDSC will be sold first, followed by those
             with the lowest CDSC. As such, the waiver benefit will be reduced
             by the amount of your shares that are not subject to a CDSC. If you
             suspend your participation in the plan, you may later resume plan
             payments without requiring a new determination of the account value
             for the 12% CDSC waiver.


           o Sales of shares that are attributable to reinvested distributions
             from, or the proceeds of, certain unit investment trusts sponsored
             by Dean Witter Reynolds.

           o Sales of shares if you simultaneously invest the proceeds in the
             Investment Manager's mutual fund asset allocation program, pursuant
             to which investors pay an asset-based fee. Any shares you acquire
             in connection with the Investment Manager's mutual fund asset
             allocation program are subject to all of the terms and conditions
             of that program, including termination fees, mandatory sale or
             transfer restrictions on termination.


          All waivers will be granted only following the Fund's distributor
          receiving confirmation of your entitlement. If you believe you are
          eligible for a CDSC waiver, please contact your Financial Advisor or
          call (800) 869-NEWS.


          Distribution Fee. 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.


          Conversion Feature. After ten (10) years, Class B shares will convert
          automatically to Class A shares of the Fund with no initial sales
          charge. The ten year period runs 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, from the last day of the month in which
          the original Class B shares were purchased; the shares will convert
          to Class A shares based on their relative net asset values in the
          month following the ten year period. At the same time, an equal
          proportion of Class B shares acquired through automatically
          reinvested distributions will convert to Class A shares on the same
          basis. (Class B shares held before May 1, 1997, however, will convert
          to Class A shares in May 2007.)


20


<PAGE>





          In the case of Class B shares held in an MSDW Eligible Plan, 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 Class B shares of a
          Morgan Stanley Dean Witter Fund purchased by that plan.



          Currently, the Class B share conversion is not a taxable event; the
          conversion feature may be cancelled if it is deemed a taxable event
          in the future by the Internal Revenue Service.


          If you exchange your Class B shares for shares of a Money Market
          Fund, a No-Load Fund, North American Government Income Trust or
          Short-Term U.S. Treasury Trust, the holding period for conversion is
          frozen as of the last day of the month of the exchange and resumes on
          the last day of the month you exchange back into Class B shares.


          Exchanging Shares Subject to a CDSC. There are special considerations
          when you exchange Fund shares that are subject to a CDSC. When
          determining the length of time you held the shares and the
          corresponding CDSC rate, any period (starting at the end of the
          month) during which you held shares of a fund that does not charge a
          CDSC will not be counted. Thus, in effect the "holding period" for
          purposes of calculating the CDSC is frozen upon exchanging into a
          fund that does not charge a CDSC.



          For example, if you held Class B shares of the Fund for one year,
          exchanged to Class B of another Morgan Stanley Dean Witter
          Multi-Class Fund for another year, then sold your shares, a CDSC rate
          of 4% would be imposed on the shares based on a two year holding
          period -- one year for each fund. However, if you had exchanged the
          shares of the Fund for a Money Market Fund (which does not charge a
          CDSC) instead of the Multi-Class Fund, then sold your shares, a CDSC
          rate of 5% would be imposed on the shares based on a one year holding
          period. The one year in the Money Market Fund would not be counted.
          Nevertheless, if shares subject to a CDSC are exchanged for a fund
          that does not charge a CDSC, you will receive a credit when you sell
          the shares equal to the distribution (12b-1) fees, if any, you paid
          on those shares while in that fund up to the amount of any applicable
          CDSC.


          In addition, shares that are exchanged into or from a Morgan Stanley
          Dean Witter Fund subject to a higher CDSC rate will be subject to the
          higher rate, even if the shares are re-exchanged into a fund with a
          lower CDSC rate.



          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 sales made
          within one year after the last day of the month of purchase. The CDSC
          will be assessed in the same manner and with the same CDSC waivers as
          with Class B shares.


                                                                              21


<PAGE>




          Distribution Fee. Class C shares are subject to an annual
          distribution (12b-1) fee of up to 1.0% of the average daily net
          assets of that Class. 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. Unlike Class B shares, Class C shares have no
          conversion feature and, accordingly, an investor that purchases Class
          C shares may be subject to distribution (12b-1) fees applicable to
          Class C shares for an indefinite period.


          CLASS D SHARES Class D shares are offered without any sales charge on
          purchases or sales and without any distribution (12b-1) fee. Class D
          shares are offered only to investors meeting an initial investment
          minimum of $5 million ($25 million for MSDW Eligible Plans) and the
          following investor categories:


           o Investors participating in the Investment Manager's mutual fund
             asset allocation program (subject to all of its terms and
             conditions, including termination fees, mandatory sale or transfer
             restrictions on termination) pursuant to which they pay an
             asset-based fee.

           o Persons participating in a fee-based investment program (subject
             to all of its terms and conditions, including termination fees,
             mandatory sale or transfer restrictions on termination) approved by
             the Fund's distributor pursuant to which they pay an asset-based
             fee for investment advisory, administrative and/or brokerage
             services.


           o Certain investment programs that do not charge an asset-based fee
             and have been approved by the Fund's distributor. However, Class D
             shares are not offered for investments made through Section 529
             plans (regardless of the size of the investment).


           o Employee benefit plans maintained by Morgan Stanley Dean Witter &
             Co. or any of its subsidiaries for the benefit of certain employees
             of Morgan Stanley Dean Witter & Co. and its subsidiaries.

           o Certain unit investment trusts sponsored by Dean Witter Reynolds.

           o Certain other open-end investment companies whose shares are
             distributed by the Fund's distributor.

           o Investors who were shareholders of the Dean Witter Retirement
             Series on September 11, 1998 for additional purchases for their
             former Dean Witter Retirement Series accounts.



          Meeting Class D Eligibility Minimums. To meet the $5 million ($25
          million for MSDW Eligible Plans) initial investment to qualify to
          purchase Class D shares you may combine: (1) purchases in a single
          transaction of Class D shares of the Fund and other Morgan Stanley
          Dean Witter Multi-Class Funds; and/or (2) previous purchases of Class




22

<PAGE>



          A and Class D shares of Multi-Class Funds and shares of FSC Funds you
          currently own, along with shares of Morgan Stanley Dean Witter Funds
          you currently own that you acquired in exchange for those shares.


          NO SALES CHARGES FOR REINVESTED CASH DISTRIBUTIONS If you receive a
          cash payment representing an income dividend or capital gain and you
          reinvest that amount in the applicable Class of shares by returning
          the check within 30 days of the payment date, the purchased shares
          would not be subject to an initial sales charge or CDSC.

          PLAN OF DISTRIBUTION (RULE 12b-1 FEES) The Fund has adopted a Plan of
          Distribution in accordance with Rule 12b-1 under the Investment
          Company Act of 1940 with respect to the distribution of Class A, Class
          B and Class C shares. The Plan allows the Fund to pay distribution
          fees for the sale and distribution of these shares. It also allows the
          Fund to pay for services to shareholders of Class A, Class B and Class
          C shares. Because these fees are paid out of the Fund's assets on an
          ongoing basis, over time these fees will increase the cost of your
          investment in these Classes and may cost you more than paying other
          types of sales charges.


                                                                              23


<PAGE>




FINANCIAL HIGHLIGHTS


The financial highlights table is intended to help you understand the Fund's
financial performance for the periods indicated. Certain information reflects
financial results for a single Fund share throughout each period. The total
returns in the table represent the rate an investor would have earned or lost
on an investment in the Fund (assuming reinvestment of all dividends and
distributions).


The information for the fiscal year ended September 30, 2000 has been audited
by Deloitte & Touche LLP, independent auditors, whose report, along with the
Fund's financial statements, is included in the annual report, which is
available upon request. The financial highlights for the fiscal year ended
September 30, 1999 and all periods presented prior thereto have been audited by
other independent accountants.





<TABLE>
<CAPTION>

                                                                                                               FOR THE PERIOD
                                                              FOR THE YEAR ENDED SEPTEMBER 30,                 JULY 28, 1997*
                                                   ----------------------------------------------------           THROUGH
                                                         2000               1999               1998          SEPTEMBER 30, 1997
----------------------------------------------------------------------------------------------------------------------------------
<S>                                               <C>                <C>                <C>                 <C>
 CLASS A++
----------------------------------------------------------------------------------------------------------------------------------
 SELECTED PER-SHARE DATA
----------------------------------------------------------------------------------------------------------------------------------
 Net asset value, beginning of period                   $31.44             $20.38             $27.50              $24.62
----------------------------------------------------------------------------------------------------------------------------------
 Income (loss) from investment operations:
  Net investment loss                                    (0.12)             (0.07)             (0.06)              (0.02)
  Net realized and unrealized gain (loss)                12.89              11.50              (4.75)               2.90
                                                        -------            -------           --------            ---------
 Total income (loss) from investment operations          12.77              11.43              (4.81)               2.88
----------------------------------------------------------------------------------------------------------------------------------
 Less distributions from net realized gain               (6.47)             (0.37)             (2.31)                --
----------------------------------------------------------------------------------------------------------------------------------
 Net asset value, end of period                         $37.74             $31.44             $20.38              $27.50
----------------------------------------------------------------------------------------------------------------------------------
 TOTAL RETURN+                                           40.16%             56.81%            (18.26)%             11.70%(1)
----------------------------------------------------------------------------------------------------------------------------------
 RATIOS TO AVERAGE NET ASSETS:
----------------------------------------------------------------------------------------------------------------------------------
 Expenses                                                 0.85%(3)           0.90%(3)          0.94%(3)            0.99%(2)
----------------------------------------------------------------------------------------------------------------------------------
 Net investment loss                                     (0.35)%(3)         (0.25)%(3)        (0.23)%(3)          (0.46)%(2)
----------------------------------------------------------------------------------------------------------------------------------
 SUPPLEMENTAL DATA:
----------------------------------------------------------------------------------------------------------------------------------
 Net assets, end of period, in thousands               $44,008             $15,246            $5,822               $978
----------------------------------------------------------------------------------------------------------------------------------
 Portfolio turnover rate                                   184%                172%              178%               154%
----------------------------------------------------------------------------------------------------------------------------------
</TABLE>



*     The date shares were first 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.
(3)   Reflects overall Fund ratios for investment income and non-class specific
      expenses.


24


<PAGE>





<TABLE>
<CAPTION>
FOR THE YEAR ENDED SEPTEMBER 30,                        2000++             1999++
------------------------------------------------------------------------------------
<S>                                               <C>                <C>
 CLASS B
------------------------------------------------------------------------------------
 SELECTED PER-SHARE DATA
------------------------------------------------------------------------------------
 Net asset value, beginning of period                   $30.90           $20.19
------------------------------------------------------------------------------------
 Income (loss) from investment operations:
  Net investment loss                                    (0.44)           (0.27)
  Net realized and unrealized gain (loss)                12.71            11.35
                                                       ----------      ---------
 Total income (loss) from investment operations          12.27            11.08
------------------------------------------------------------------------------------
 Less distributions from net realized gain               (6.47)           (0.37)
------------------------------------------------------------------------------------
 Net asset value, end of period                         $36.70           $30.90
------------------------------------------------------------------------------------
 TOTAL RETURN+                                           39.12%           55.59%
------------------------------------------------------------------------------------
 RATIOS TO AVERAGE NET ASSETS:
------------------------------------------------------------------------------------
 Expenses                                                 1.61%(1)         1.70%(1)
------------------------------------------------------------------------------------
 Net investment loss                                     (1.11)%(1)       (1.05)%(1)
------------------------------------------------------------------------------------
 SUPPLEMENTAL DATA:
------------------------------------------------------------------------------------
 Net assets, end of period, in thousands               $1,056,116        $770,392
------------------------------------------------------------------------------------
 Portfolio turnover rate                                    184%             172%
------------------------------------------------------------------------------------



<CAPTION>
FOR THE YEAR ENDED SEPTEMBER 30,                        1998++          1997*++        1996
-----------------------------------------------------------------------------------------------
<S>                                               <C>                 <C>          <C>
 CLASS B
-----------------------------------------------------------------------------------------------
 SELECTED PER-SHARE DATA
-----------------------------------------------------------------------------------------------
 Net asset value, beginning of period                   $27.46           $27.71       $25.54
-----------------------------------------------------------------------------------------------
 Income (loss) from investment operations:
  Net investment loss                                    (0.20)           (0.28)       (0.23)
  Net realized and unrealized gain (loss)                (4.76)            3.92         4.32
                                                       ---------        --------     --------
 Total income (loss) from investment operations          (4.96)            3.64         4.09
-----------------------------------------------------------------------------------------------
 Less distributions from net realized gain               (2.31)           (3.89)       (1.92)
-----------------------------------------------------------------------------------------------
 Net asset value, end of period                         $20.19           $27.46       $27.71
-----------------------------------------------------------------------------------------------
 TOTAL RETURN+                                          (18.88)%          16.38%       17.53%
-----------------------------------------------------------------------------------------------
 RATIOS TO AVERAGE NET ASSETS:
-----------------------------------------------------------------------------------------------
 Expenses                                                 1.69%(1)         1.68%        1.69%
-----------------------------------------------------------------------------------------------
 Net investment loss                                     (0.98)%(1)       (1.21)%      (1.03)%
-----------------------------------------------------------------------------------------------
 SUPPLEMENTAL DATA:
-----------------------------------------------------------------------------------------------
 Net assets, end of period, in thousands               $596,834         $877,539     $799,201
-----------------------------------------------------------------------------------------------
 Portfolio turnover rate                                   178%             154%         149%
-----------------------------------------------------------------------------------------------
</TABLE>



*     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)   Reflects overall Fund ratios for investment income and non-class specific
      expenses.



                                                                              25


<PAGE>




<TABLE>
<CAPTION>

                                                                                                               FOR THE PERIOD
                                                              FOR THE YEAR ENDED SEPTEMBER 30,                 JULY 28, 1997*
                                                    -----------------------------------------------------         THROUGH
                                                         2000               1999               1998          SEPTEMBER 30, 1997
--------------------------------------------------------------------------------------------------------------------------------
<S>                                               <C>                <C>                <C>                 <C>
 CLASS C++
--------------------------------------------------------------------------------------------------------------------------------
 SELECTED PER SHARE DATA
--------------------------------------------------------------------------------------------------------------------------------
 Net asset value, beginning of period                 $30.95               $20.19             $27.46              $24.62
--------------------------------------------------------------------------------------------------------------------------------
 Income (loss) from investment operations:
  Net investment loss                                  (0.42)               (0.25)             (0.23)              (0.05)
  Net realized and unrealized gain (loss)              12.70                11.38              (4.73)               2.89
                                                      -------              -------            --------            ---------
 Total income (loss) from investment operations        12.28                11.13              (4.96)               2.84
--------------------------------------------------------------------------------------------------------------------------------
 Less distributions from net realized gain             (6.47)               (0.37)             (2.31)                --
--------------------------------------------------------------------------------------------------------------------------------
 Net asset value, end of period                       $36.76               $30.95             $20.19              $27.46
--------------------------------------------------------------------------------------------------------------------------------
 TOTAL RETURN+                                        39.09%                55.84%            (18.88)%             11.54%(1)
--------------------------------------------------------------------------------------------------------------------------------
 RATIOS TO AVERAGE NET ASSETS:
--------------------------------------------------------------------------------------------------------------------------------
 Expenses                                             1.61%(3)              1.58%(3)            1.69%(3)            1.71%(2)
--------------------------------------------------------------------------------------------------------------------------------
 Net investment loss                                 (1.11)%(3)            (0.93)%(3)          (0.98)%(3)          (1.19)%(2)
--------------------------------------------------------------------------------------------------------------------------------
 SUPPLEMENTAL DATA:
--------------------------------------------------------------------------------------------------------------------------------
 Net assets, end of period, in thousands            $17,007                 $4,728             $2,185              $1,066
--------------------------------------------------------------------------------------------------------------------------------
 Portfolio turnover rate                               184%                   172%               178%                154%
--------------------------------------------------------------------------------------------------------------------------------
</TABLE>



*     The date shares were first 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.
(3)   Reflects overall Fund ratios for investment income and non-class specific
      expenses.


26

<PAGE>


<TABLE>
<CAPTION>

                                                                                                             FOR THE PERIOD
                                                             FOR THE YEAR ENDED SEPTEMBER 30,                JULY 28, 1997*
                                                   ---------------------------------------------------          THROUGH
                                                         2000               1999              1998         SEPTEMBER 30, 1997
-------------------------------------------------------------------------------------------------------------------------------
<S>                                               <C>                <C>                <C>               <C>
 CLASS D++
-------------------------------------------------------------------------------------------------------------------------------
 SELECTED PER SHARE DATA
-------------------------------------------------------------------------------------------------------------------------------
 Net asset value, beginning of period                   $31.60             $20.44            $27.51              $24.62
-------------------------------------------------------------------------------------------------------------------------------
 Income (loss) from investment operations:
  Net investment income (loss)                            0.03              (0.01)             0.01               (0.01)
  Net realized and unrealized gain (loss)                12.91              11.54             (4.77)               2.90
                                                        -------           -------            --------           --------
 Total income (loss) from investment operations          12.94              11.53             (4.76)               2.89
-------------------------------------------------------------------------------------------------------------------------------
 Less distributions from net realized gain               (6.47)             (0.37)            (2.31)                --
-------------------------------------------------------------------------------------------------------------------------------
 Net asset value, end of period                         $38.07             $31.60            $20.44              $27.51
-------------------------------------------------------------------------------------------------------------------------------
 TOTAL RETURN+                                           40.53%             57.14%           (18.05)%             11.74%(1)
-------------------------------------------------------------------------------------------------------------------------------
 RATIOS TO AVERAGE NET ASSETS:
-------------------------------------------------------------------------------------------------------------------------------
 Expenses                                                 0.61%(3)           0.70%(3)           0.69%(3)           0.70%(2)
-------------------------------------------------------------------------------------------------------------------------------
 Net investment income (loss)                            (0.11)%(3)         (0.05)%(3)          0.02%(3)          (0.20)%(2)
-------------------------------------------------------------------------------------------------------------------------------
 SUPPLEMENTAL DATA:
-------------------------------------------------------------------------------------------------------------------------------
 Net assets, end of period, in thousands               $66,696             $6,625             $3,291                $22
-------------------------------------------------------------------------------------------------------------------------------
 Portfolio turnover rate                                   184%               172%               178%               154%
-------------------------------------------------------------------------------------------------------------------------------
</TABLE>



*     The date shares were first issued.
++    The per share amount 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.
(3)   Reflects overall Fund ratios for investment income and non-class specific
      expenses.



                                                                              27

<PAGE>






NOTES



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28

<PAGE>



MORGAN STANLEY DEAN WITTER
FAMILY OF FUNDS

          The Morgan Stanley Dean Witter Family of Funds offers investors a wide
          range of investment choices. Come on in and meet the family!




<TABLE>
<S>                        <C>                                <C>
------------------------------------------------------------------------------------------------------------------------
 GROWTH FUNDS              GROWTH FUNDS                         THEME FUNDS
                           Aggressive Equity Fund               Financial Services Trust
                           American Opportunities Fund          Health Sciences Trust
                           Capital Growth Securities            Information Fund
                           Developing Growth Securities         Natural Resource Development Securities
                           Growth Fund                          Technology Fund
                           Market Leader Trust
                           Mid-Cap Equity Trust                 GLOBAL/INTERNATIONAL FUNDS
                           New Discoveries Fund                 Competitive Edge Fund - "Best Ideas" Portfolio
                           Next Generation Trust                European Growth Fund
                           Small Cap Growth Fund                Fund of Funds - International Portfolio
                           Special Value Fund                   International Fund
                           Tax-Managed Growth Fund              International SmallCap Fund
                           21st Century Trend Fund              Japan Fund
                                                                Latin American Growth Fund
                                                                Pacific Growth Fund

</TABLE>




<TABLE>
<S>                        <C>                                   <C>
-------------------------------------------------------------------------------------------------------------------------
 GROWTH & INCOME FUNDS     Balanced Growth Fund                  Total Return Trust
                           Balanced Income Fund                  Value Fund
                           Convertible Securities Trust          Value-Added Market Series/Equity Portfolio
                           Dividend Growth Securities
                           Equity Fund                           THEME FUNDS
                           Fund of Funds - Domestic Portfolio    Real Estate Fund
                           Income Builder Fund                   Utilities Fund
                           S&P 500 Index Fund
                           S&P 500 Select Fund                   GLOBAL FUNDS
                           Strategist Fund                       Global Dividend Growth Securities
                           Total Market Index Fund               Global Utilities Fund
</TABLE>



<TABLE>
<S>                        <C>                                   <C>
------------------------------------------------------------------------------------------------------------------------
 INCOME FUNDS              GOVERNMENT INCOME FUNDS               GLOBAL INCOME FUNDS
                           Federal Securities Trust              North American Government Income Trust
                           Short-Term U.S. Treasury Trust        World Wide Income Trust
                           U.S. Government Securities Trust
                                                                 TAX-FREE INCOME FUNDS
                           DIVERSIFIED INCOME FUNDS              California Tax-Free Income Fund
                           Diversified Income Trust              Hawaii Municipal Trust(FSC)
                                                                 Limited Term Municipal Trust(NL)
                           CORPORATE INCOME FUNDS                Multi-State Municipal Series Trust(FSC)
                           High Yield Securities                 New York Tax-Free Income Fund
                           Intermediate Income Securities        Tax-Exempt Securities Trust
                           Short-Term Bond Fund(NL)
</TABLE>


<TABLE>
<S>                       <C>                                    <C>
------------------------------------------------------------------------------------------------------------------------
 MONEY MARKET FUNDS       TAXABLE MONEY MARKET FUNDS             TAX-FREE MONEY MARKET FUNDS
                          Liquid Asset Fund(MM)                  California Tax-Free Daily Income Trust(MM)
                          U.S. Government Money Market Trust(MM) New York Municipal Money Market Trust(MM)
                                                                 Tax-Free Daily Income Trust(MM)
</TABLE>


There may be funds created after this Prospectus was published. Please consult
the inside back cover of a new fund's prospectus for its designation, e.g.,
Multi-Class Fund or Money Market Fund.

Unless otherwise noted, each listed Morgan Stanley Dean Witter Fund except for
North American Government Income Trust and Short-Term U.S. Treasury Trust is a
Multi-Class Fund. A Multi-Class Fund is a mutual fund offering multiple Classes
of shares. The other types of funds are: NL -- No-Load (Mutual) Fund; MM --
Money Market Fund; FSC -- A mutual fund sold with a front-end sales charge
and a distribution (12b-1) fee.


<PAGE>



                                                 PROSPECTUS - NOVEMBER 29, 2000


Additional information about the Fund's investments is available in the Fund's
Annual and Semi-Annual Reports to Shareholders. In the Fund's Annual Report, you
will find a discussion of the market conditions and investment strategies that
significantly affected the Fund's performance during its last fiscal year. The
Fund's Statement of Additional Information also provides additional information
about the Fund. The Statement of Additional Information is incorporated herein
by reference (legally is part of this Prospectus). For a free copy of any of
these documents, to request other information about the Fund, or to make
shareholder inquiries, please call:

                                (800) 869-NEWS


You also may obtain information about the Fund by calling your Morgan Stanley
Dean Witter Financial Advisor or by visiting our Internet site at:


                            WWW.MSDWADVICE.COM/FUNDS


Information about the Fund (including the Statement of Additional Information)
can be viewed and copied at the Securities and Exchange Commission's Public
Reference Room in Washington, DC. Information about the Reference Room's
operations may be obtained by calling the SEC at (202) 942-8090. Reports and
other information about the Fund are available on the EDGAR Database on the
SEC's Internet site (www.sec.gov), and copies of this information may be
obtained, after paying a duplicating fee, by electronic request at the
following E-mail address: [email protected], or by writing the Public
Reference Section of the SEC, Washington, DC 20549-0102.

  TICKER SYMBOLS:

  Class A:                   DGRAX
----------------------------------------
  Class B:                   DGRBX
----------------------------------------
  Class C:                   DGRCX
----------------------------------------
  Class D:                   DGRDX
----------------------------------------

(THE FUND'S INVESTMENT COMPANY ACT FILE NO. IS 811-3639)

Morgan Stanley Dean Witter


[GRAPHIC OMITTED]


                                                               DEVELOPING GROWTH
                                                                SECURITIES TRUST

                                                        A MUTUAL FUND THAT SEEKS
                                                        LONG-TERM CAPITAL GROWTH


<PAGE>


STATEMENT OF ADDITIONAL INFORMATION
                                                 MORGAN STANLEY DEAN WITTER
                                                 DEVELOPING GROWTH SECURITIES
                                                 TRUST


NOVEMBER 29, 2000


--------------------------------------------------------------------------------

     This Statement of Additional Information is not a Prospectus. The
Prospectus (dated November 29, 2000) for the Morgan Stanley Dean Witter
Developing Growth Securities Trust may be obtained without charge from the Fund
at its address or telephone number listed below or from Dean Witter Reynolds at
any of its branch offices.





Morgan Stanley Dean Witter
Developing Growth Securities Trust
Two World Trade Center
New York, New York 10048
(800) 869-NEWS



<PAGE>

TABLE OF CONTENTS
--------------------------------------------------------------------------------


<TABLE>
<S>                                                                    <C>
I.    Fund History ...................................................  4
II.   Description of the Fund and Its Investments and Risks ..........  4
         A.  Classification ..........................................  4
         B.  Investment Strategies and Risks .........................  4
         C.  Fund Policies/Investment Restrictions ...................  7
III.  Management of the Fund .........................................  8
         A.  Board of Trustees .......................................  8
         B.  Management Information ..................................  9
         C.  Compensation ............................................ 13
IV.   Control Persons and Principal Holders of Securities ............ 15
V.    Investment Management and Other Services ....................... 15
         A.  Investment Manager ...................................... 15
         B.  Principal Underwriter ................................... 15
         C.  Services Provided by the Investment Manager ............. 16
         D.  Dealer Reallowances ..................................... 17
         E.  Rule 12b-1 Plan ......................................... 17
         F.  Other Service Providers ................................. 21
         G.  Codes of Ethics ......................................... 22
VI.   Brokerage Allocation and Other Practices ....................... 22
         A.  Brokerage Transactions .................................. 22
         B.  Commissions ............................................. 22
         C.  Brokerage Selection ..................................... 23
         D.  Directed Brokerage ...................................... 24
         E.  Regular Broker-Dealers .................................. 24
VII.  Capital Stock and Other Securities ............................. 24
VIII. Purchase, Redemption and Pricing of Shares ..................... 25
         A.  Purchase/Redemption of Shares ........................... 25
         B.  Offering Price .......................................... 25
IX.   Taxation of the Fund and Shareholders .......................... 26
X.    Underwriters ................................................... 28
XI.   Calculation of Performance Data ................................ 28
XII.  Financial Statements ........................................... 29
</TABLE>


                                       2



<PAGE>

                      GLOSSARY OF SELECTED DEFINED TERMS

     The terms defined in this glossary are frequently used in this Statement
of Additional Information (other terms used occasionally are defined in the
text of the document).


     "Custodian" - The Bank of New York.


     "Dean Witter Reynolds" - Dean Witter Reynolds Inc., a wholly-owned
broker-dealer subsidiary of MSDW.


     "Distributor" - Morgan Stanley Dean Witter Distributors Inc., a
wholly-owned broker-dealer subsidiary of MSDW.


     "Financial Advisors" - Morgan Stanley Dean Witter authorized financial
services representatives.


     "Fund" - Morgan Stanley Dean Witter Developing Growth Securities Trust, a
registered open-end investment company.


     "Independent Trustees" - Trustees who are not "interested persons" (as
defined by the Investment Company Act) of the Fund.


     "Investment Manager" - Morgan Stanley Dean Witter Advisors Inc., a
wholly-owned investment advisor subsidiary of MSDW.


     "Morgan Stanley & Co." - Morgan Stanley & Co. Incorporated, a wholly-owned
broker-dealer subsidiary of MSDW.


     "Morgan Stanley Dean Witter Funds" - Registered investment companies (i)
for which the Investment Manager serves as the investment advisor and (ii) that
hold themselves out to investors as related companies for investment and
investor services.


     "MSDW" - Morgan Stanley Dean Witter & Co., a preeminent global financial
services firm.


     "MSDW Services Company" - Morgan Stanley Dean Witter Services Company
Inc., a wholly-owned fund services subsidiary of the Investment Manager.


     "Transfer Agent" - Morgan Stanley Dean Witter Trust FSB, a wholly-owned
transfer agent subsidiary of MSDW.


     "Trustees" - The Board of Trustees of the Fund.

                                       3

<PAGE>

I. FUND HISTORY
--------------------------------------------------------------------------------
     The Fund was organized as a Massachusetts business trust, under a
Declaration of Trust, on December 28, 1982, with the name Dean Witter
Developing Growth Securities Trust. On June 22, 1998, the Fund's name was
changed to Morgan Stanley Dean Witter Developing Growth Securities Trust.


II. DESCRIPTION OF THE FUND AND ITS INVESTMENTS AND RISKS
--------------------------------------------------------------------------------
A. CLASSIFICATION


     The Fund is an open-end, diversified management investment company whose
investment objective is to seek long-term capital growth.


B. INVESTMENT STRATEGIES AND RISKS

     The following discussion of the Fund's investment strategies and risks
should be read with the sections of the Fund's Prospectus titled "Principal
Investment Strategies," "Principal Risks," "Additional Investment Strategy
Information," and "Additional Risk Information."

     MONEY MARKET SECURITIES. The Fund may invest in various money market
securities for cash management purposes or when assuming a temporary defensive
position, which among others may include commercial paper, bank acceptances,
bank obligations, corporate debt securities, certificates of deposit, U.S.
Government securities, obligations of savings institutions and repurchase
agreements. Such securities are limited to:

     U.S. Government Securities. Obligations issued or guaranteed as to
principal and interest by the United States or its agencies (such as the
Export-Import Bank of the United States, Federal Housing Administration and
Government National Mortgage Association) or its instrumentalities (such as the
Federal Home Loan Bank), including Treasury bills, notes and bonds;

     Bank Obligations. Obligations (including certificates of deposit, time
deposits and bankers' acceptances) of banks subject to regulation by the U.S.
Government and having total assets of $1 billion or more, and instruments
secured by such obligations, not including obligations of foreign branches of
domestic banks except to the extent below;

     Eurodollar Certificates of Deposit. Eurodollar certificates of deposit
issued by foreign branches of domestic banks having total assets of $1 billion
or more;

     Obligations of Savings Institutions. Certificates of deposit of savings
banks and savings and loan associations, having total assets of $1 billion or
more;

     Fully Insured Certificates of Deposit. Certificates of deposit of banks
and savings institutions, having total assets of less than $1 billion, if the
principal amount of the obligation is federally insured by the Bank Insurance
Fund or the Savings Association Insurance Fund (each of which is administered
by the FDIC), limited to $100,000 principal amount per certificate and to 10%
or less of the Fund's total assets in all such obligations and in all illiquid
assets, in the aggregate;

     Commercial Paper. Commercial paper rated within the two highest grades by
Standard & Poor's Corporation ("S&P") or the two highest grade by Moody's
Investors Service, Inc. ("Moody's") or, if not rated, issued by a company
having an outstanding debt issue rated at least AA by S&P or Aa by Moody's; and

     Repurchase Agreements. The Fund may invest in 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 serving as collateral at a specified price
and at a fixed


                                       4



<PAGE>

time in the future, usually not more than seven days from the date of purchase.
The collateral 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 this 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 Trustees. 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.

     LENDING PORTFOLIO SECURITIES. The Fund may lend its portfolio securities
to brokers, dealers and other financial institutions, provided that the loans
are callable at any time by the Fund, 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 100% of the market value,
determined daily, of the loaned securities. The advantage of these 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 more
than 25% of the value of its total assets.

     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.

     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 the
rights if the matters involved would have a material effect on the Fund's
investment in the loaned securities. The Fund will pay reasonable finder's,
administrative and custodial fees in connection with a loan of its securities.

     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 these 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, their value may be more
or less than the purchase or sale price. 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


                                       5


<PAGE>

of its net asset value. The Fund will also establish a segregated account on
the Fund's books 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.

     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 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 determines that issuance of the security is probable. At
that time, the Fund will record the transaction and, in determining its net
asset value, will reflect the value of the security daily. At that time, the
Fund will also establish a segregated account on the Fund's books in which it
will maintain cash or cash equivalents or other liquid portfolio securities
equal in value to recognized commitments for such securities.

     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 sale.

     PRIVATE PLACEMENTS. The Fund may invest up to 15% of its net assets in
securities which are subject to restrictions on resale because they have not
been registered under the Securities Act of 1933 (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
these 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 the securities for resale and the
risk of substantial delays in effecting the registration.

     Rule 144A permits the Fund to sell restricted securities to qualified
institutional buyers without limitation. The Investment Manager, pursuant to
procedures adopted by the Trustees, 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," the security will not be included within
the category "illiquid securities," which 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.

     WARRANTS. The Fund may acquire warrants. A warrant is, in effect, an
option to purchase equity securities at a specific price, generally valid for a
specific period of time, and has no voting rights, pays no dividends and has no
rights with respect to the corporation issuing it.

     INVESTMENT IN REAL ESTATE INVESTMENT TRUSTS. The Fund may invest in real
estate investment trusts, which pool investors' funds for investments primarily
in commercial real estate properties. Investment in real estate investment
trusts may be the most practical available means for the Fund to invest in the
real estate industry (the Fund is prohibited from investing in real estate
directly). As a shareholder in a real estate investment trust, the Fund would
bear its ratable share of the real estate investment trust's expenses,
including its advisory and administration fees. At the same time the Fund would
continue to pay its own investment management fees and other expenses, as a
result of which the Fund and its shareholders in effect will be absorbing
duplicate levels of fees with respect to investments in real estate investment
trusts.

     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.


                                       6



<PAGE>

     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.


     LEVERAGING. The Fund may borrow money from a bank in an amount up to 25%
of the Fund's total assets (including the amount borrowed) less its liabilities
(not including any borrowings but including the fair market value at the time
of computation of any other senior securities then outstanding). The Fund may
borrow to seek to enhance capital appreciation by leveraging its investments
through purchasing securities with borrowed funds. The Fund will maintain asset
coverage with respect to any borrowings in accordance with the Investment
Company Act of 1940 (the "Investment Company Act"). Leveraging Fund investments
has speculative characteristics.



C. FUND POLICIES/INVESTMENT RESTRICTIONS


     The investment objective, policies and restrictions listed below have been
adopted by the Fund as fundamental policies. Under the Investment Company Act
of 1940, as amended, a fundamental policy may not be changed without the vote
of a majority of the outstanding voting securities of the Fund. The Investment
Company Act defines a majority 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. For purposes of the following restrictions:
(i) all percentage limitations apply immediately after a purchase or initial
investment (unless otherwise noted); 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 will:

    1.  Seek long-term capital growth.

   The Fund may not:

    1.  Invest more than 5% of the value of its total assets in the securities
        of any one issuer (other than obligations issued, or guaranteed, by the
        United States government, its agencies or instrumentalities).

    2.  Purchase more than 10% of all outstanding voting securities or any
        class of securities of any one issuer.

    3.  Concentrate its investments in any particular industry, but if deemed
        appropriate for attainment of its investment objective, up to 25% of
        its total assets (valued at the time of investment) may be invested in
        any one industry classification used by the Fund for investment
        purposes. This restriction does not apply to obligations issued or
        guaranteed by the United States government or its agencies or
        instrumentalities.

    4.  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 of the United States government, its agencies or
        instrumentalities.

    5.  Borrow money, except from banks for investment purposes or as a
        temporary measure for extraordinary or emergency purposes.

    6.  Invest in securities of any issuer if, to the knowledge of the Fund,
        any officer or trustee of the Fund or any officer or director of the
        Investment Manager owns more than 1/2 of 1% of the outstanding
        securities of such issuer, and such officers, trustees and directors
        who own more than 1/2 of 1% own in the aggregate more than 5% of the
        outstanding securities of such issuer.


                                       7


<PAGE>

    7.  Purchase or sell real estate or interests therein, although the Fund
        may purchase securities of issuers which engage in real estate
        operations and securities which are secured by real estate or interests
        therein.

    8.  Purchase or sell commodities or commodity futures contracts.

    9.  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.

   10.  Write, purchase or sell puts, calls, or combinations thereof.

   11.  Purchase securities of other investment companies, except in
        connection with a merger, consolidation, reorganization or acquisition
        of assets.

   12.  Invest more than 5% of its total assets in warrants, including not
        more than 2% of such assets in warrants not listed on either the New
        York or American Stock Exchange. However, the acquisition of warrants
        attached to other securities is not subject to this restriction.

   13.  Pledge its assets or assign or otherwise encumber them except to
        secure permitted borrowings. To meet the requirements of regulations in
        certain states, the Fund, as a matter of operating policy but not as a
        fundamental policy, will limit any pledge of its assets to 5% of its
        net assets so long as shares of the Fund are being sold in those
        states.

   14.  Issue senior securities as defined in the Investment Company Act
        except insofar as the Fund may be deemed to have issued a senior
        security by reason of: (a) entering into any repurchase agreement; (b)
        borrowing money; or (c) lending portfolio securities.

   15.  Make loans of money or securities, except by: (a) the purchase of debt
        obligations; (b) investment in repurchase agreements; or (c) lending
        its portfolio securities.

   16.  Make short sales of securities.

   17.  Purchase securities on margin, except for such short-term loans as are
        necessary for the clearance of portfolio securities.

   18.  Engage in the underwriting of securities, except insofar as the Fund
        may be deemed an underwriter under the Securities Act in disposing of a
        portfolio security.

   19.  Invest for the purpose of exercising control or management of any
        other 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.


III. MANAGEMENT OF THE FUND
--------------------------------------------------------------------------------
A. BOARD OF TRUSTEES


     The Board of Trustees of the Fund oversees the management of the Fund but
does not itself manage the Fund. The Trustees review various services provided
by or under the direction of the Investment Manager to ensure that the Fund's
general investment policies and programs are properly carried out. The Trustees
also conduct their review to ensure that administrative services are provided
to the Fund in a satisfactory manner.

     Under state law, the duties of the Trustees are generally characterized as
a duty of loyalty and a duty of care. The duty of loyalty requires a Trustee to
exercise his or her powers in the interest of the Fund and not the Trustee's
own interest or the interest of another person or organization. A Trustee
satisfies his or her duty of care by acting in good faith with the care of an
ordinarily prudent person and in a manner the Trustee reasonably believes to be
in the best interest of the Fund and its shareholders.


                                       8



<PAGE>

B. MANAGEMENT INFORMATION



     TRUSTEES AND OFFICERS. The Board of the Fund consists of nine (9)
Trustees. These same individuals also serve as directors or trustees for all of
the Morgan Stanley Dean Witter Funds. Six Trustees (67% of the total number)
have no affiliation or business connection with the Investment Manager or any
of its affiliated persons and do not own any stock or other securities issued
by the Investment Manager's parent company, MSDW. These are the
"non-interested" or "independent" Trustees. The other three Trustees (the
"management Trustees") are affiliated with the Investment Manager.


     The Trustees and executive officers of the Fund, their principal business
occupations during the last five years and their affiliations, if any, with the
Investment Manager, and with the Morgan Stanley Dean Witter Funds (there were
93 such funds as of the calendar year ended December 31, 1999), are shown
below.






<TABLE>
<CAPTION>
 NAME, AGE, POSITION WITH FUND AND ADDRESS        PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
-------------------------------------------   ----------------------------------------------------
<S>                                           <C>
Michael Bozic (59) ........................   Retired; Director or Trustee of the Morgan Stanley
Trustee                                       Dean Witter Funds; formerly Vice Chairman of
c/o Mayer, Brown & Platt                      Kmart Corporation (December 1998-October
Counsel to the Independent Trustees           2000), Chairman and Chief Executive Officer of
1675 Broadway                                 Levitz Furniture Corporation (November 1995-
New York, New York                            November 1998) and President and Chief
                                              Executive Officer of Hills Department Stores (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 Weirton Steel Corporation.
Charles A. Fiumefreddo* (67) ..............   Chairman, Director or Trustee and Chief Executive
Chairman of the Board,                        Officer of the Morgan Stanley Dean Witter Funds;
Chief Executive Officer and Trustee           formerly Chairman, Chief Executive Officer and
Two World Trade Center                        Director of the Investment Manager, the Distributor
New York, New York                            and MSDW Services Company; Executive Vice
                                              President and Director of Dean Witter Reynolds;
                                              Chairman and Director of the Transfer Agent;
                                              formerly Director and/or officer of various MSDW
                                              subsidiaries (until June 1998).
Edwin J. Garn (68) ........................   Director or Trustee of the Morgan Stanley Dean
Trustee                                       Witter Funds; formerly United States Senator (R-
c/o Summit Ventures LLC                       Utah) (1974-1992) and Chairman, Senate Banking
1 Utah Center                                 Committee (1980-1986); formerly Mayor of Salt
201 S. Main Street                            Lake City, Utah (1971-1974); formerly Astronaut,
Salt Lake City, Utah                          Space Shuttle Discovery (April 12-19, 1985); Vice
                                              Chairman, Huntsman Corporation (chemical
                                              company); Director of Franklin Covey (time
                                              management systems), BMW Bank of North
                                              America, Inc. (industrial loan corporation), United
                                              Space Alliance (joint venture between Lockheed
                                              Martin and the Boeing Company) and Nuskin Asia
                                              Pacific (multilevel marketing); member of the Utah
                                              Regional Advisory Board of Pacific Corp.; member
                                              of the board of various civic and charitable
                                              organizations.
</TABLE>


                                       9


<PAGE>



<TABLE>
<CAPTION>
 NAME, AGE, POSITION WITH FUND AND ADDRESS         PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
-------------------------------------------   -----------------------------------------------------
<S>                                           <C>
Wayne E. Hedien (66) ......................   Retired; Director or Trustee of the Morgan Stanley
Trustee                                       Dean Witter Funds; Director of The PMI Group, Inc.
c/o Mayer, Brown & Platt                      (private mortgage insurance); Trustee and Vice
Counsel to the Independent Trustees           Chairman of The Field Museum of Natural History;
1675 Broadway                                 formerly associated with the Allstate Companies
New York, New York                            (1966-1994), most recently as Chairman of The
                                              Allstate Corporation (March 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.
James F. Higgins* (52) ....................   Chariman of the Private Client Group of MSDW
Trustee                                       (since August 2000); Director of the Transfer Agent
Two World Trade Center                        and Dean Witter Realty Inc.; Director or Trustee of
New York, New York                            the Morgan Stanley Dean Witter Funds (since
                                              June 2000); previously President and Chief
                                              Operating Officer of the Private Client Group of
                                              MSDW (May 1999-August 2000), President and
                                              Chief Operating Officer of Individual Securities of
                                              MSDW (February 1997-May 1999), President and
                                              Chief Operating Officer of Dean Witter Securities
                                              of MSDW (1995-February 1997), and President
                                              and Chief Operating Officer of Dean Witter
                                              Financial (1989-1995) and Director (1985-1997) of
                                              Dean Witter Reynolds.
Dr. Manuel H. Johnson (51) ................   Senior Partner, Johnson Smick International, Inc.,
Trustee                                       a consulting firm; Co-Chairman and a founder of
c/o Johnson Smick International, Inc.         the Group of Seven Council (G7C), an international
1133 Connecticut Avenue, N.W.                 economic commission; Chairman of the Audit
Washington, D.C.                              Committee and Director or Trustee of the Morgan
                                              Stanley Dean Witter Funds; Director of Greenwich
                                              Capital Markets, Inc. (broker-dealer), Independence
                                              Standards Board (private sector organization
                                              governing independence of auditors) 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 and
                                              Assistant Secretary of the U.S. Treasury.
Michael E. Nugent (64) ....................   General Partner, Triumph Capital, L.P., a private
Trustee                                       investment partnership; Chairman of the Insurance
c/o Triumph Capital, L.P.                     Committee and Director or Trustee of the Morgan
237 Park Avenue                               Stanley Dean Witter Funds; formerly Vice President,
New York, New York                            Bankers Trust Company and BT Capital Corporation;
                                              director of various business organizations.
</TABLE>


                                       10


<PAGE>



<TABLE>
<CAPTION>
 NAME, AGE, POSITION WITH FUND AND ADDRESS         PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
-------------------------------------------   -----------------------------------------------------
<S>                                           <C>
Philip J. Purcell* (57) ...................   Chairman of the Board of Directors and Chief
Trustee                                       Executive Officer of MSDW, Dean Witter Reynolds
1585 Broadway                                 and Novus Credit Services Inc.; Director of the
New York, New York                            Distributor; Director or Trustee of the Morgan
                                              Stanley Dean Witter Funds; Director of American
                                              Airlines, Inc. and its parent company, AMR
                                              Corporation; Director and/or officer of various
                                              MSDW subsidiaries.
John L. Schroeder (70) ....................   Retired; Chairman of the Derivatives Committee
Trustee                                       and Director or Trustee of the Morgan Stanley
c/o Mayer, Brown & Platt                      Dean Witter Funds; Director of Citizens
Counsel to the Independent Trustees           Communications Company (telecommunications
1675 Broadway                                 company); formerly Executive Vice President and
New York, New York                            Chief Investment Officer of the Home Insurance
                                              Company (August 1991-September 1995).
Mitchell M. Merin (47) ....................   President and Chief Operating Officer of Asset
President                                     Management of MSDW (since December 1998);
Two World Trade Center                        President and Director (since April 1997) and Chief
New York, New York                            Executive Officer (since June 1998) of the
                                              Investment Manager and MSDW Services
                                              Company; Chairman, Chief Executive Officer and
                                              Director of the Distributor (since June 1998);
                                              Chairman and Chief Executive Officer (since June
                                              1998) and Director (since January 1998) of the
                                              Transfer Agent; Director of various MSDW
                                              subsidiaries; President of the Morgan Stanley Dean
                                              Witter Funds (since May 1999); Trustee of various
                                              Van Kampen investment companies (since
                                              December 1999); previously Chief Strategic Officer
                                              of the Investment Manager and MSDW Services
                                              Company and Executive Vice President of the
                                              Distributor (April 1997-June 1998), Vice President
                                              of the Morgan Stanely Dean Witter Funds (May
                                              1997-April 1999), and Executive Vice President of
                                              Dean Witter, Discover & Co.
Barry Fink (45) ...........................   General Counsel of Asset Management of MSDW
Vice President, Secretary                     (since May 2000); Executive Vice President (since
and General Counsel                           December 1999) and Secretary and General
Two World Trade Center                        Counsel (since February 1997) and Director (since
New York, New York                            July 1998) of the Investment Manager and MSDW
                                              Services Company; Vice President, Secretary and
                                              General Counsel of the Morgan Stanley Dean
                                              Witter Funds (since February 1997); Vice President
                                              and Secretary of the Distributor; previously, Senior
                                              Vice President (March 1997-December 1999), First
                                              Vice President, Assistant Secretary and Assistant
                                              General Counsel of the Investment Manager and
                                              MSDW Services Company.
Armon Bar-Tur (30) ........................   Vice President of the Investment Manager (since
Vice President                                October 1996); Vice President of various Morgan
Two World Trade Center                        Stanley Dean Witter Funds formerly a research
New York, New York                            analyst with Merrill Lynch Asset Management.
</TABLE>


                                       11

<PAGE>



<TABLE>
<CAPTION>
 NAME, AGE, POSITION WITH FUND AND ADDRESS        PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS
-------------------------------------------   ----------------------------------------------------
<S>                                           <C>
John S. Roscoe (37) .......................   Vice President of the Investment Manager (since
Vice President                                April 1998) and Portfolio Manager (since December
Two World Trade Center                        1997); Vice President of various Morgan Stanley
New York, New York                            Dean Witter Funds; formerly an equity analyst at
                                              Rockefeller and Company, Inc.
Thomas F. Caloia (54) .....................   First Vice President and Assistant Treasurer of the
Treasurer                                     Investment Manager, the Distributor and MSDW
Two World Trade Center                        Services Company; Treasurer of the Morgan
New York, New York                            Stanley Dean Witter Funds.
</TABLE>


----------
* Denotes Trustees who are "interested persons" of the Fund as defined by the
   Investment Company Act.



     In addition, Ronald E. Robison, Executive Vice President, Chief
Administrative Officer and Director of the Investment Manager and MSDW Services
Company, Robert S. Giambrone, Senior Vice President of the Investment Manager,
MSDW Services Company, the Distributor and the Transfer Agent and Director of
the Transfer Agent, Joseph J. McAlinden, Executive Vice President and Chief
Investment Officer of the Investment Manager and Director of the Transfer
Agent, Ira N. Ross, Senior Vice President of the Investment Manager and Paul D.
Vance, Senior Vice President of the Investment Manager and Director of the
Growth and Income group of the Investment Manager, are Vice Presidents of the
Fund.

     In addition, Marilyn K. Cranney, Todd Lebo, Lou Anne D. McInnis, Carsten
Otto and Ruth Rossi, First Vice Presidents and Assistant General Counsels of
the Investment Manager and MSDW Services Company, and Natasha Kassian,
Assistant Vice President and Assistant General Counsel of the Investment
Manager and MSDW Services Company, are Assistant Secretaries of the Fund.

     INDEPENDENT DIRECTORS/TRUSTEES AND THE COMMITTEES. Law and regulation
establish both general guidelines and specific duties for the independent
directors/trustees. The Morgan Stanley Dean Witter Funds seek as independent
directors/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 funds make substantial demands on their
time. All of the independent directors/trustees serve as members of the Audit
Committee. In addition, three of the directors/trustees, including two
independent directors/trustees, serve as members of the Derivatives Committee
and the Insurance Committee.

     The independent directors/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 directors/trustees are required to select and nominate individuals
to fill any independent director/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 a Rule 12b-1 plan.

     The Audit Committee is charged with recommending to the full board the
engagement or discharge of the Fund's independent auditors; directing
investigations into matters within the scope of the independent auditors'
duties, including the power to retain outside specialists; reviewing with the
independent auditors the audit plan and results of the auditing engagement;
approving professional services provided by the independent auditors and other
accounting firms prior to the performance of the services; reviewing the
independence of the independent auditors; considering the range of audit and
non-audit fees; reviewing the adequacy of the Fund's system of internal
controls; and preparing and submitting Committee meeting minutes to the full
board.

     The board of each fund has 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.



                                       12


<PAGE>


     Finally, the board of each fund has formed an Insurance Committee to
review and monitor the insurance coverage maintained by the Fund.

     ADVANTAGES OF HAVING SAME INDIVIDUALS AS INDEPENDENT DIRECTORS/TRUSTEES
FOR ALL MORGAN STANLEY DEAN WITTER FUNDS. The independent directors/trustees
and the funds' management believe that having the same independent
directors/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 directors/trustees for each of the funds or
even of sub-groups of funds. They believe that having the same individuals
serve as independent directors/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 directors/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
directors/trustees, of the caliber, experience and business acumen of the
individuals who serve as independent directors/trustees of the Morgan Stanley
Dean Witter Funds.


     TRUSTEE AND OFFICER INDEMNIFICATION. The Fund's 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/her or its own bad faith, willful
misfeasance, gross negligence or reckless disregard of his/her or its duties.
It also provides that all third persons shall look solely to the Fund 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 liability
in connection with the affairs of the Fund.


C. COMPENSATION


     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
and the Chairmen of the Derivatives and Insurance Committees additional annual
fees of $500). 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.


     The following table illustrates the compensation that the Fund paid to its
Independent Trustees for the fiscal year ended September 30, 2000.



                               FUND COMPENSATION





<TABLE>
<CAPTION>
                                     AGGREGATE
                                   COMPENSATION
NAME OF INDEPENDENT TRUSTEE        FROM THE FUND
-------------------------------   --------------
<S>                               <C>
Michael Bozic .................       $1,550
Edwin J. Garn .................        1,600
Wayne E. Hedien ...............        1,600
Dr. Manuel H. Johnson .........        2,350
Michael E. Nugent .............        2,100
John L. Schroeder .............        2,050
</TABLE>




                                       13

<PAGE>


     The following table illustrates the compensation paid to the Fund's
Independent Trustees for the calendar year ended December 31, 1999 for services
to the 93 Morgan Stanley Dean Witter Funds that were in operation at December
31, 1999.



            CASH COMPENSATION FROM MORGAN STANLEY DEAN WITTER FUNDS





<TABLE>
<CAPTION>
                                     TOTAL CASH
                                    COMPENSATION
                                 FOR SERVICES TO 93
                                   MORGAN STANLEY
                                    DEAN WITTER
NAME OF INDEPENDENT TRUSTEE            FUNDS
------------------------------- -------------------
<S>                             <C>
Michael Bozic .................       $134,600
Edwin J. Garn .................        138,700
Wayne E. Hedien ...............        138,700
Dr. Manuel H. Johnson .........        208,638
Michael E. Nugent .............        193,324
John L. Schroeder .............        193,324
</TABLE>


     As of the date of this Statement of Additional Information, 55 of the
Morgan Stanley Dean Witter Funds, including the Fund, have adopted a retirement
program under which an independent director/  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/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 director/  trustee referred to as an "Eligible
Trustee") is entitled to retirement payments upon reaching the eligible
retirement age (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 30.22% of his or her Eligible Compensation
plus 0.5036667% of such Eligible Compensation for each full month of service as
an independent director/ trustee of any Adopting Fund in excess of five years
up to a maximum of 60.44% 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 accrued as expenses on
the books of the Adopting Funds. Such benefits 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 Fund for the fiscal year ended September 30,
2000 and by the 55 Morgan Stanley Dean Witter Funds (including the Fund) for
the year ended December 31, 1999, and the estimated retirement benefits for the
Independent Trustees, to commence upon their retirement, from the Fund as of
September 30, 2000 and from the 55 Morgan Stanley Dean Witter Funds as of
December 31, 1999.



----------
(1)   An Eligible Trustee may elect alternative payments of his or her
      retirement benefits based upon the combined life expectancy of the
      Eligible Trustee and his or her spouse on the date of such Eligible
      Trustee's retirement. In addition, the Eligible Trustee may elect that
      the surviving spouse's periodic payment of benefits will be equal to a
      lower percentage of the periodic amount when both spouses were alive. The
      amount estimated to be payable under this method, through the remainder
      of the later of the lives of the Eligible Trustee and spouse, will be the
      actuarial equivalent of the Regular Benefit.


                                       14


<PAGE>

         RETIREMENT BENEFITS FROM ALL MORGAN STANLEY DEAN WITTER FUNDS






<TABLE>
<CAPTION>
                                                                                                   ESTIMATED
                                       FOR ALL ADOPTING FUNDS             RETIREMENT                 ANNUAL
                                  --------------------------------         BENEFITS                 BENEFITS
                                     ESTIMATED                            ACCRUED AS                  UPON
                                      CREDITED                             EXPENSES               RETIREMENT(2)
                                       YEARS           ESTIMATED     ---------------------   -------------------------
                                   OF SERVICE AT     PERCENTAGE OF                BY ALL                   FROM ALL
                                     RETIREMENT        ELIGIBLE       BY THE     ADOPTING       FROM       ADOPTING
NAME OF INDEPENDENT TRUSTEE         (MAXIMUM 10)     COMPENSATION      FUND        FUNDS      THE FUND      FUNDS
-------------------------------   ---------------   --------------   --------   ----------   ----------   ---------
<S>                               <C>               <C>              <C>        <C>          <C>          <C>
Michael Bozic .................          10              60.44%       $  391     $20,933       $  967     $50,588
Edwin J. Garn .................          10              60.44           653      31,737          967      50,675
Wayne E. Hedien ...............           9              51.37           734      39,566          822      43,000
Dr. Manuel H. Johnson .........          10              60.44           381      13,129        1,420      75,520
Michael E. Nugent .............          10              60.44           691      23,175        1,269      67,209
John L. Schroeder .............           8              50.37         1,113      41,558          987      52,994
</TABLE>


----------
(2)   Based on current levels of compensation. Amount of annual benefits also
      varies depending on the Trustee's elections described in Footnote (1) on
      page 14.


IV. CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES
--------------------------------------------------------------------------------

     The following owned 5% or more of the outstanding Class A shares of the
Fund as of November 10, 2000: Morgan Stanley Dean Witter Trust FSB Trustee,
Atlantic Automotive Corp. 401(k) Plan , P.O. Box 957, Jersey City, N.J.
07303-0957-7.711%.


     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% of the Fund's shares of
beneficial interest outstanding.


V. INVESTMENT MANAGEMENT AND OTHER SERVICES
--------------------------------------------------------------------------------
A. INVESTMENT MANAGER


     The Investment Manager to the Fund is Morgan Stanley Dean Witter Advisors
Inc., a Delaware corporation, whose address is Two World Trade Center, New
York, NY 10048. The Investment Manager is a wholly-owned subsidiary of MSDW, a
Delaware corporation. MSDW is a preeminent global financial services firm that
maintains leading market positions in each of its three primary businesses:
securities, asset management and credit services.


     Pursuant to an Investment Management Agreement (the "Management
Agreement") with the Investment Manager, the Fund has retained the Investment
Manager to provide administrative services and manage the investment of the
Fund's assets, including the placing of orders for the purchase and sale of
portfolio securities. The Fund pays the Investment Manager monthly compensation
calculated daily by applying the following annual rates to the net assets of
the Fund determined as of the close of each business day: 0.50% to the portion
of the Fund's average daily net assets not exceeding $500 million and 0.475% of
the portion of the Fund's average daily net assets exceeding $500 million. The
management fee is allocated among the Classes pro rata based on the net assets
of the Fund attributable to each Class. For the fiscal years ended September
30, 1998, 1999 and 2000, the Fund accrued total compensation to the Investment
Manager under the Management Agreement in the amount of $3,924,618, $3,515,654
and $5,906,875, respectively.


     The Investment Manager has retained its wholly-owned subsidiary, MSDW
Services Company, to perform administrative services for the Fund.

B. PRINCIPAL UNDERWRITER

     The Fund's principal underwriter is the Distributor (which has the same
address as the Investment Manager). In this capacity, the Fund's shares are
distributed by the Distributor. The Distributor has


                                       15


<PAGE>

entered into a selected dealer agreement with Dean Witter Reynolds, which
through its own sales organization sells shares of the Fund. In addition, the
Distributor may enter into similar agreements with other selected
broker-dealers. The Distributor, a Delaware corporation, is a wholly-owned
subsidiary of MSDW.


     The Distributor bears all expenses it may incur in providing services
under the Distribution Agreement. These expenses include the payment of
commissions for sales of the Fund's shares and incentive compensation to
Financial Advisors, the cost of educational and/or business-related trips, and
educational and/or promotional and business-related expenses. 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 and state 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. 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.


C. SERVICES PROVIDED BY THE INVESTMENT MANAGER

     The Investment Manager manages the investment of the Fund's assets,
including the placing of orders for the purchase and sale of portfolio
securities. The Investment Manager obtains and evaluates the 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, 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, the office space,
facilities, equipment, clerical help, bookkeeping and certain legal services as
the Fund may reasonably require in the conduct of its business, including the
preparation of prospectuses, proxy statements and reports required to be filed
with federal and state securities commissions (except insofar as the
participation or assistance of independent auditors 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.


     Expenses not expressly assumed by the Investment Manager under the
Management Agreement or by the Distributor, will be paid by the Fund. These
expenses will be allocated among the four Classes of shares 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; charges and expenses of any registrar,
custodian, stock transfer and dividend disbursing agent; brokerage commissions;
taxes; engraving and printing 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 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 any corporate affiliate of the Investment Manager;
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


                                       16



<PAGE>


the Fund or of the Investment Manager (not including compensation or expenses
of attorneys who are employees of the Investment Manager); fees and expenses of
the Fund's independent auditors; membership dues of industry associations;
interest on Fund 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);
and all other costs of the Fund's operation. 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
obligations 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 will remain in effect from year to year, provided
continuance of the Management Agreement is approved at least annually by the
vote of the holders of a majority, as defined in the Investment Company Act, of
the outstanding shares of the Fund, or by the Trustees; provided that in either
event such continuance is approved annually by the vote of a majority of the
Trustees, including a majority of the Independent Trustees.


D. DEALER REALLOWANCES

     Upon notice to selected broker-dealers, the Distributor may reallow up to
the full applicable front-end sales charge 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.


E. RULE 12B-1 PLAN

     The Fund has adopted a Plan of Distribution pursuant to Rule 12b-1 under
the Investment Company Act (the "Plan") 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 average daily net assets of Class B.

     The Distributor also receives the proceeds of front-end sales charges
("FSCs") and of contingent deferred sales charges ("CDSCs") imposed on certain
redemptions of shares, which are separate and apart from payments made pursuant
to the Plan. The Distributor has informed the Fund that it and/or Dean Witter
Reynolds received the proceeds of CDSCs and FSCs, for the last three fiscal
years ended September 30, in approximate amounts as provided in the table below
(the Distributor did not retain any of these amounts).




<TABLE>
<CAPTION>
                              2000                     1999                       1998
                     -----------------------   ---------------------   --------------------------
<S>                  <C>          <C>          <C>        <C>          <C>          <C>
Class A ..........   FSCs:(1)     $ 93,205     FSCs:      $ 34,000     FSCs:(1)     $   56,000
                     CDSCs:       $     51     CDSCs:     $    190     CDSCs:       $       40
Class B ..........   CDSCs:       $642,814     CDSCs:     $940,000     CDSCs:       $1,202,000
Class C ..........   CDSCs:       $ 11,297     CDSCs:     $  1,600     CDSCs:       $    2,700
</TABLE>


----------
(1)   FSCs apply to Class A only.


     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'


                                       17

<PAGE>

average daily net assets are currently each characterized as a "service fee"
under the Rules 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 Rules of the Association.


     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 under the Plan and the
purpose for which such expenditures were made. For the fiscal year ended
September 30, 2000, Class B shares of the Fund accrued amounts payable to the
Distributor under the Plan of $11,379,057. This amount is equal to 1.00% of the
average daily net assets of Class B and was calculated pursuant to clause (b)
of the compensation formula under the Plan. For the fiscal year ended September
30, 2000, Class A and Class C shares of the Fund accrued payments under the
Plan amounting to $82,464 and $134,820, 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 the fiscal year.


     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, each with a different distribution arrangement.


     With respect to Class A shares, Dean Witter Reynolds compensates its
Financial Advisors by paying them, from proceeds of the FSC, 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 $1 million or more (for which no sales
charge was paid) or net asset value purchases by employer-sponsored employee
benefit plans, whether or not qualified under the Internal Revenue Code, for
which the Transfer Agent serves as Trustee or MSDW's Retirement Plan Services
serves as recordkeeper pursuant to a written Recordkeeping Services Agreement
("MSDW Eligible Plans"), the Investment Manager compensates 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, Dean Witter Reynolds 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 by MSDW Eligible Plans, Dean
Witter Reynolds 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, Dean Witter Reynolds 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 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
the Investment Manager's mutual fund asset allocation program, the Investment
Manager compensates Dean Witter Reynolds' 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 Dean
Witter Reynolds' Financial Advisors by paying them, from its own funds, an
annual residual commission, currently 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 Investment Manager's mutual fund
asset allocation program).

     The gross sales credit is a charge which reflects commissions paid by Dean
Witter Reynolds to its Financial Advisors and Dean Witter Reynolds'
Fund-associated distribution-related expenses, including



                                       18



<PAGE>


sales compensation, and overhead and other branch office distribution-related
expenses including (a) the expenses of operating Dean Witter Reynolds' 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 Investment Manager pays a retention fee to Financial Advisors at an
annual rate of 0.05% of the value of shares of the Fund sold after January 1,
2000 and held for at least one year. Shares purchased through the reinvestment
of dividends will be eligible for a retention fee, provided that such dividends
were earned on shares otherwise eligible for a retention fee payment. Shares
owned in variable annuities, closed-end fund shares and shares held in 401(k)
plans where the Transfer Agent or MSDW's Retirement Plan Services is either
recordkeeper or trustee are not eligible for a retention fee.

     For the first year only, the retention fee is paid on any shares of the
Fund sold after January 1, 2000 and held by shareholders on December 31, 2000.

     The retention fees are paid by the Investment Manager from its own assets,
which may include profits from investment management fees payable under the
Management Agreement, as well as from borrowed funds.

     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"). These expenses may include the cost of Fund-related educational
and/or business-related trips or payment of Fund-related educational and/or
promotional expenses of Financial Advisors. For example, the Distributor has
implemented a compensation program available only to Financial Advisors meeting
specified criteria under which certain marketing and/or promotional expenses of
those Financial Advisors are paid by the Distributor out of compensation it
receives under the Plan. 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 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 Financial Advisors and other
authorized financial representatives, such amounts shall be determined at the
beginning of each calendar quarter by the Trustees, including, a majority of
the Independent Trustees. Expenses representing the service fee (for Class A)
or a gross sales credit or a residual to Financial Advisors and other
authorized financial 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.


                                       19


<PAGE>


     Each Class paid 100% of the amounts accrued under the Plan with respect to
that Class for the fiscal year ended September 30, 2000 to the Distributor. The
Distributor and Dean Witter Reynolds estimate that they have spent, pursuant to
the Plan, $94,536,029 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) 7.62% ($7,208,359) - advertising and promotional expenses; (ii) 0.59%
($556,557) - printing of prospectuses for distribution to other than current
shareholders; and (iii) 91.79% ($86,771,113) - other expenses, including the
gross sales credit and the carrying charge, of which 17.99% ($15,611,119)
represents carrying charges, 33.95% ($29,460,238) represents commission credits
to Dean Witter Reynolds branch offices and other selected broker-dealers for
payments of commissions to Financial Advisors and other authorized financial
representatives, and 48.05% ($41,699,756) represents overhead and other branch
office distribution-related expenses. The amounts accrued by Class A and a
portion of the amounts accrued by Class C under the Plan during the fiscal year
ended September 30, 2000 were service fees. The remainder of the amounts
accrued by Class C 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 of
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 CDSCs
paid by investors upon redemption of 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 in
the case of Class B shares the excess distribution expenses, including the
carrying charge designed to approximate the opportunity costs incurred by Dean
Witter Reynolds 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, totaled $18,337,042 as of September 30, 2000 (the end of
the Fund's fiscal year), which was equal to 1.74% 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 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 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 authorized financial 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 authorized financial
representatives at the time of sale totaled $12,005 in the case of Class C at
December 31, 1999 (the end of the calendar year), which amount was equal to
0.12% of the net assets of Class C on such date, and that there were no such
expenses that 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.


     No interested person of the Fund nor any Independent Trustee has any
direct financial interest in the operation of the Plan except to the extent
that the Distributor, the Investment Manager, Dean Witter Reynolds, MSDW
Services Company 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.

     On an annual basis, the Trustees, including a majority of the Independent
Trustees, consider whether the Plan should be continued. Prior to approving the
last continuation of the Plan, the Trustees


                                       20




<PAGE>


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, including that: (a) the
Plan is essential in order to give Fund investors a choice of alternatives for
payment of distribution and service charges and to enable the Fund to continue
to grow and avoid a pattern of net redemptions which, in turn, are essential
for effective investment management; and (b) without the compensation to
individual brokers and the reimbursement of distribution and account
maintenance expenses of Dean Witter Reynolds' branch offices made possible by
the 12b-1 fees, Dean Witter Reynolds could not establish and maintain an
effective system for distribution, servicing of Fund shareholders and
maintenance of shareholder accounts; 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, including each of the
Independent 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 by the shareholders of the
affected Class or Classes of the Fund, and all material amendments to 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 Trustees or by a vote of a majority of the
outstanding voting securities of the Fund (as defined in the Investment Company
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.


F. OTHER SERVICE PROVIDERS


(1) TRANSFER AGENT/DIVIDEND-PAYING AGENT

     Morgan Stanley Dean Witter Trust FSB is the Transfer Agent for the Fund's
shares and the Dividend Disbursing Agent for payment of dividends and
distributions on Fund shares and Agent for shareholders under various
investment plans. The principal business address of the Transfer Agent is
Harborside Financial Center, Plaza Two, Jersey City, NJ 07311.



(2) CUSTODIAN AND INDEPENDENT AUDITORS

     The Bank of New York, 100 Church Street, New York, NY 10007 is the
Custodian of the Fund's assets. Any of the Fund's cash balances with the
Custodian in excess of $100,000 are unprotected by federal deposit insurance.
These balances may, at times, be substantial.

     Deloitte & Touche LLP, Two World Financial Center, New York, NY 10281,
serves as the independent auditors of the Fund. The independent auditors are
responsible for auditing the annual financial statements of the Fund.



(3) AFFILIATED PERSONS

     The Transfer Agent is an affiliate of the Investment Manager, and of the
Distributor. As Transfer Agent and Dividend Disbursing Agent, the Transfer
Agent'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, the Transfer Agent receives a per shareholder account fee from the
Fund and is reimbursed for its out-of-pocket expenses in connection with such
services.


                                       21


<PAGE>


G. CODES OF ETHICS

     The Fund, the Invesment Manager and the Distributor have each adopted a
Code of Ethics pursuant to Rule 17j-1 under the Investment Company Act. The
Codes of Ethics are designed to detect and prevent improper personal trading.
The Codes of Ethics permit personnel subject to the Codes to invest in
securities, including securities that may be purchased, sold or held by the
Fund, subject to a number of restrictions and controls including prohibitions
against purchases of securities in an Initial Public Offering and a
preclearance requirement with respect to personal securities transactions.



VI. BROKERAGE ALLOCATION AND OTHER PRACTICES
--------------------------------------------------------------------------------
A. BROKERAGE TRANSACTIONS


     Subject to the general supervision of the Trustees, the Investment Manager
is 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 also 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. On occasion, the Fund may also purchase certain money market
instruments directly from an issuer, in which case no commissions or discounts
are paid.


     For the fiscal years ended September 30, 1998, 1999 and 2000, the Fund
paid a total of $2,210,633, $2,017,461 and $1,832,572, respectively, in
brokerage commissions.



B. COMMISSIONS

     Pursuant to an order of the SEC, the Fund may effect principal
transactions in certain money market instruments with Dean Witter Reynolds. The
Fund will limit its transactions with Dean Witter Reynolds to U.S. Government
and government agency securities, bank money instruments (i.e., certificates of
deposit and bankers' acceptances) and commercial paper. The transactions will
be effected with Dean Witter Reynolds only when the price available from Dean
Witter Reynolds is better than that available from other dealers.


     During the fiscal years ended September 30, 1998, 1999 and 2000, the Fund
did not effect any principal transactions with Dean Witter Reynolds.


     Brokerage transactions in securities listed on exchanges or admitted to
unlisted trading privileges may be effected through Dean Witter Reynolds,
Morgan Stanley & Co. and other affiliated brokers and dealers. In order for an
affiliated broker or dealer to effect any portfolio transactions on an exchange
for the Fund, the commissions, fees or other remuneration received by the
affiliated broker or dealer 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 the affiliated broker or dealer to receive no more than the remuneration
which would be expected to be received by an unaffiliated broker in a
commensurate arm's-length transaction. Furthermore, the Trustees, including the
Independent Trustees, 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 fiscal years ended September 30, 1998, 1999 and 2000, the Fund
paid a total of $100,032, $103,031 and $55,512, respectively, in brokerage
commissions to Dean Witter Reynolds. During the fiscal year ended September 30,
2000, the brokerage commissions paid to Dean Witter Reynolds represented
approximately 3.03% of the total brokerage commissions paid by the Fund during



                                       22



<PAGE>


the year and were paid on account of transactions having an aggregate dollar
value equal to approximately 3.91% of the aggregate dollar value of all
portfolio transactions of the Fund during the year for which commissions were
paid.

     During the fiscal years ended September 30, 1998, 1999 and 2000, the Fund
paid a total of $125,345, $59,825 and $48,964, respectively, in brokerage
commissions to Morgan Stanley & Co. During the fiscal year ended September 30,
2000, the brokerage commissions paid to Morgan Stanley & Co. represented
approximately 2.67% of the total brokerage commissions paid by the Fund during
the year and were paid on account of transactions having an aggregate dollar
value equal to approximately 2.55% of the aggregate dollar value of all
portfolio transactions of the Fund during the year for which commissions were
paid.



C. BROKERAGE SELECTION

     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 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 relies
upon its 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. These
determinations are necessarily subjective and imprecise, as 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
effects transactions with those brokers and dealers who the Investment Manager
believes provide the most favorable prices and are capable of providing
efficient executions. If the Investment Manager believes the 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. The 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 from brokers and
dealers may be of benefit to the Investment Manager in the management of
accounts of some of its other clients and may not in all cases benefit the Fund
directly.


     The Investment Manager currently serves as investment manager to a number
of clients, including other investment companies, and may in the future act as
investment manager or advisor to others. It is the practice of the Investment
Manager 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 relevant funds and/or client
accounts involved and the number of shares available from the public offering.



                                       23


<PAGE>

D. DIRECTED BROKERAGE


     During the fiscal year ended September 30, 2000, the Fund paid $1,548,264
in brokerage commissions in connection with transactions in the aggregate
amount of $709,506,155 to brokers because of research services provided.



E. REGULAR BROKER-DEALERS


     During the fiscal year ended September 30, 2000, the Fund did not purchase
securities issued by brokers or dealers that were among the ten brokers or ten
dealers which executed transactions for or with the Fund in the largest dollar
amounts during the period. At September 30, 2000, the Fund did not own any
securities issued by any such issuers.



VII. CAPITAL STOCK AND OTHER SECURITIES
--------------------------------------------------------------------------------
     The shareholders of the Fund are entitled to a full vote for each full
share of beneficial interest held. The Fund is authorized to issue an unlimited
number of shares of beneficial interest. 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, Class A, Class
B and Class C bear expenses related to the distribution of their respective
shares.

     The Fund's 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 presently authorized any
such additional series or Classes of shares other than as set forth in the
Prospectus.


     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 the actions
of the Trustees. In addition, under certain circumstances, the shareholders may
call a meeting to remove the Trustees and the Fund is required to provide
assistance in communicating with shareholders about such a meeting. 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.


     Under Massachusetts law, shareholders of a business trust may, under
certain limited circumstances, be held personally liable as partners for the
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 notice of such Fund obligations include such disclaimer, and
provides for indemnification 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, the possibility of the Fund
being unable to meet its obligations is remote and thus, in the opinion of
Massachusetts counsel to the Fund, the risk to Fund shareholders of personal
liability is remote.


     All of the Trustees, except for James F. Higgins, 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 (as provided for in the
Declaration of Trust), and they may at any time lengthen or shorten 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.



                                       24


<PAGE>

VIII. PURCHASE, REDEMPTION AND PRICING OF SHARES
--------------------------------------------------------------------------------
A. PURCHASE/REDEMPTION OF SHARES


     Information concerning how Fund shares are offered to the public (and how
they are redeemed and exchanged) is provided in the Fund's Prospectus.

     TRANSFER AGENT AS AGENT. With respect to the redemption or repurchase of
Fund shares, the application of proceeds to the purchase of new shares in the
Fund or any other Morgan Stanley Dean Witter Funds and the general
administration of the exchange privilege, the Transfer Agent acts as agent for
the Distributor and for the shareholder's authorized 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 authorized broker-dealer.

     The Distributor and any authorized broker-dealer have 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 Morgan Stanley Dean Witter Fund and the general administration of the
exchange privilege. No commission or discounts will be paid to the Distributor
or any authorized broker-dealer for any transaction pursuant to the exchange
privilege.

     TRANSFERS OF SHARES. In the event a shareholder requests a transfer of
Fund shares to a new registration, the 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.


     OUTSIDE BROKERAGE ACCOUNTS. If a shareholder wishes to maintain his or her
fund account through a brokerage company other than Dean Witter Reynolds, he or
she may do so only if the Distributor has entered into a selected dealer
agreement with that brokerage company. Accounts maintained through a brokerage
company other than Dean Witter Reynolds may be subject to certain restrictions
on subsequent purchases and exchanges. Please contact your brokerage company or
the Transfer Agent for more information.



B. OFFERING PRICE

     The Fund's Class B, Class C and Class D shares are offered at net asset
value per share and the Class A shares are offered at net asset value per share
plus any applicable FSC which is distributed among the Fund's Distributor, Dean
Witter Reynolds and other authorized dealers as described in Section "V.
Investment Management and Other Services - E. Rule 12b-1 Plan." The price of
Fund shares, called "net asset value," is based on the value of the Fund's
portfolio securities. Net asset value per share of each Class is calculated by
dividing the value of the portion of the Fund's securities and other assets
attributable to that Class, less the liabilities attributable to that Class, by
the number of shares of that Class outstanding. The assets of each Class of
shares are invested in a single portfolio. The net asset value of each Class,
however, will differ because the Classes have different ongoing fees.


     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, NASDAQ,
or other exchange is valued at its latest sale price, 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 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



                                       25


<PAGE>

under which it is determined by the Investment Manager that sale or 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 Fund's 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.

     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 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, U.S.
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 may 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 that
may affect the value of such securities occur during such period, then these
securities may be valued at their fair value as determined in good faith under
procedures established by and under the supervision of the Trustees.


IX. TAXATION OF THE FUND AND SHAREHOLDERS
--------------------------------------------------------------------------------

     The Fund generally will make two basic types of distributions: ordinary
dividends and long-term capital gain distributions. These two types of
distributions are reported differently on a shareholder's income tax return and
they are also subject to different rates of tax. The tax treatment of the
investment activities of the Fund will affect the amount and timing and
character of the distributions made by the Fund. Tax issues relating to the
Fund are not generally a consideration for shareholders such as tax- exempt
entities and tax-advantaged retirement vehicles such as an IRA or 401(k) plan.
Shareholders are urged to consult their own tax professionals regarding
specific questions as to federal, state or local taxes.


     INVESTMENT COMPANY TAXATION. 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, to the extent that it distributes
such income and capital gains to its shareholders.

     The Fund generally intends to distribute sufficient income and gains so
that the Fund will not pay corporate income tax on its earnings. The Fund also
generally intends to distribute to its shareholders in each calendar year a
sufficient amount of ordinary income and capital gains to avoid the imposition
of a 4% excise tax. However, the Fund may instead determine to retain all or
part of any net long-term capital gains in any year for reinvestment. In such
event, the Fund will pay federal income tax (and possibly excise tax) on such
retained gains.


     Gains or losses on sales of securities by the Fund will be long-term
capital gains or losses if the securities have a tax holding period of more
than one year. Gains or losses on the sale of securities with a tax holding
period of one year or less will be short-term gains or losses.

     Under certain tax rules, the Fund may be required to accrue a portion of
any discount at which certain securities are purchased as income each year even
though the Fund receives no payments in cash on the security during the year.
In addition, if the Fund invests in an equity security of a non-U.S.



                                       26



<PAGE>


corporation classified as a "passive foreign investment company" for U.S. tax
purposes, the application of certain technical tax provisions applying to
investments in such companies may result in the Fund being required to accrue
income in respect of the security without any receipt of cash attributable to
such income. To the extent that the Fund invests in such securities, it would
be required to pay out such income as an income distribution in each year in
order to avoid taxation at the Fund level. Such distributions will be made from
the available cash of the Fund or by liquidation of portfolio securities if
necessary. If a distribution of cash necessitates the liquidation of portfolio
securities, the Investment Manager will select which securities to sell. The
Fund may realize a gain or loss from such sales. In the event the Fund realizes
net capital gains from such transactions, its shareholders may receive a larger
capital gain distribution, if any, than they would in the absence of such
transactions.


     TAXATION OF DIVIDENDS AND DISTRIBUTIONS. Shareholders normally will have
to pay federal income taxes, and any state and/or local income taxes, on the
dividends and other 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.


     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. The maximum tax rate on long-term
capital gains realized by non-corporate shareholders is 20%.


     Shareholders are generally taxed on any ordinary dividend or capital gain
distributions from the Fund in the year they are actually distributed. However,
if any such dividends or distributions are declared in October, November or
December and paid in January then such amounts will be treated for tax purposes
as received by the shareholders on December 31, to shareholders of record of
such month.

     Subject to certain exceptions, a corporate shareholder may be eligible for
a 70% dividends received deduction to the extent that the Fund earns and
distributes qualifying dividends from its investments. Distributions of net
capital gains by the Fund will not be eligible for the dividends received
deduction.


     Shareholders who are not citizens or residents of the United States and
certain foreign entities may be subject to withholding of United States tax on
distributions made by the Fund of investment income and short-term capital
gains.

     After the end of each calendar year, shareholders will be sent information
on their dividends and capital gain distributions for tax purposes, including
the portion taxable as ordinary income, and the portion taxable as long-term
capital gains.


     PURCHASES AND REDEMPTIONS AND EXCHANGES OF FUND SHARES. 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, such dividends and capital gains
distributions 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 long-term capital gains,
such payment or distribution would be in part a return of the shareholder's
investment but nonetheless would be taxable to the shareholder. Therefore, an
investor should consider the tax implications of purchasing Fund shares
immediately prior to a distribution record date.


     In general, a sale of shares results in capital gain or loss, and for
individual shareholders, is taxable at a federal rate dependent upon the length
of time the shares were held. A redemption of a shareholder's Fund shares is
normally treated as a sale for tax purposes. Fund shares held for a period of
one year or less will, for tax purposes, generally result in short-term gains
or losses and those held for more than one year generally result in long-term
gain or loss. Under current law, the maximum tax rate on long-term capital
gains realized by non-corporate shareholders is 20%. Any loss realized by
shareholders upon a sale or 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 with respect to such shares
during the six-month period.



                                       27


<PAGE>

     Gain or loss on the sale or redemption of shares in the Fund is measured
by the difference between the amount received and the tax basis of the shares.
Shareholders should keep records of investments made (including shares acquired
through reinvestment of dividends and distributions) so they can compute the
tax basis of their shares. Under certain circumstances a shareholder may
compute and use an average cost basis in determining the gain or loss on the
sale or redemption of shares.

     Exchanges of Fund shares for shares of another fund, including shares of
other Morgan Stanley Dean Witter Funds, are also subject to similar tax
treatment. Such an exchange is treated for tax purposes as a sale of the
original shares in the first fund, followed by the purchase of shares in the
second fund.

     If a shareholder realizes a loss on the redemption or exchange of a fund's
shares and reinvests in that fund's shares within 30 days before or after the
redemption or exchange, the transactions may be subject to the "wash sale"
rules, resulting in a postponement of the recognition of such loss for tax
purposes.


X. UNDERWRITERS
--------------------------------------------------------------------------------

     The Fund's shares are offered to the public on a continuous basis. The
Distributor, as the principal underwriter of the shares, has certain
obligations under the Distribution Agreement concerning the distribution of the
shares. These obligations and the compensation the Distributor receives are
described above in the sections titled "Principal Underwriter" and "Rule 12b-1
Plan."



XI. CALCULATION OF PERFORMANCE DATA
--------------------------------------------------------------------------------

     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 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 operations, if shorter than any of the foregoing. The ending
redeemable value is reduced by any contingent deferred sales charge ("CDSC") at
the end of the one, five, 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 (which in the case of Class A shares is reduced by the Class A
initial sales charge), 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. Based on this calculation, the average annual total returns for Class B
for the one year, five year and ten year periods ended September 30, 2000 were
34.12%, 18.96% and 22.13%, respectively. The average annual total returns of
Class A for the fiscal year ended September 30, 2000 and for the period July
28, 1997 (inception of the Class) through September 30, 2000 were 32.80% and
22.42%, respectively. The average annual total returns of Class C for the
fiscal year ended September 30, 2000 and for the period July 28, 1997
(inception of the Class) through September 30, 2000 were 38.09% and 23.63%,
respectively. The average annual total returns of Class D for the fiscal year
ended September 30, 2000 and for the period July 28, 1997 (inception of the
Class) through September 30, 2000 were 40.53% and 24.82%, respectively.

     In addition, 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. These 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 return of the
Fund may be calculated in the manner described above, but without deduction for
any applicable sales charge. Based on this calculation, the average annual
total returns of Class B for the one year, five year and ten year periods ended
September 30, 2000 were 39.12%, 19.15% and 22.13%, respectively. The average
annual total returns of Class A for the fiscal year ended September 30, 2000
and for the period July 28, 1997 (inception of the Class) through



                                       28



<PAGE>


September 30, 2000 were 40.16% and 24.52%, respectively. The average annual
total returns of Class C for the fiscal year ended September 30, 2000 and for
the period July 28, 1997 (inception of the Class) through September 30, 2000
were 39.09% and 23.63%, respectively. The average annual total returns of Class
D for the fiscal year ended September 30, 2000 and for the period July 28, 1997
(inception of the Class) through September 30, 2000 were 40.53% and 24.82%,
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 $1,000 investment
and subtracting 1 from the result. Based on this calculation, the total returns
of Class B for the one year, five year and ten year periods ended September 30,
2000 were 39.12%, 140.19% and 638.34%, respectively. The total returns of Class
A for the fiscal year ended September 30, 2000 and for the period July 28, 1997
(inception of the Class) through September 30, 2000 were 40.16% and 100.67%,
respectively. The total returns of Class C for the fiscal year ended September
30, 2000 and for the period July 28, 1997 (inception of the Class) through
September 30, 2000 were 39.09% and 96.13%, respectively. The total returns of
Class D for the fiscal year ended September 30, 2000 and for the period July
28, 1997 (inception of the Class) through September 30, 2000 were 40.53% and
102.20%, 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 aggregate total return to date (expressed as a decimal and
without taking into account the effect of any 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 of 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 September
30, 2000:






<TABLE>
<CAPTION>
                                     INVESTMENT AT INCEPTION OF:
                     INCEPTION   ------------------------------------
CLASS                  DATE:      $10,000      $50,000      $100,000
-----------------   ----------   ---------   ----------   -----------
<S>                 <C>          <C>         <C>          <C>
Class A .........   07/28/97     $19,013     $96,322      $194,650
Class B .........   04/29/83      69,349     346,745       693,490
Class C .........   07/28/97      19,613      98,065       196,130
Class D .........   07/28/97      20,220     101,100       202,200
</TABLE>


     The Fund from time to time may also advertise its performance relative to
certain performance rankings and indexes compiled by recognized organizations.


XII. FINANCIAL STATEMENTS
--------------------------------------------------------------------------------

     EXPERTS. The financial statements of the Fund for the fiscal year ended
September 30, 2000 included herein in reliance on the report of Deloitte &
Touche LLP, independent auditors, and on the authority of that firm as experts
in auditing and accounting.



                                   * * * * *


     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 SEC. The complete Registration Statement may be obtained from
the SEC.


                                       29


<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
PORTFOLIO OF INVESTMENTS September 30, 2000





<TABLE>
<CAPTION>
    NUMBER OF
      SHARES                                                         VALUE
-----------------                                             -------------------
<S>                 <C>                                       <C>
                    COMMON STOCKS (74.2%)
                    Advertising/Marketing
                    Services (1.2%)
100,000             ADVO, Inc.* ...........................   $    3,300,000
355,200             Getty Images, Inc.* ...................       10,811,400
                                                              --------------
                                                                  14,111,400
                                                              --------------
                    Aerospace & Defense (3.3%)
385,200             Innovative Solutions & Support,
                    Inc.* .................................        6,596,550
172,000             L-3 Communications Holdings,
                    Inc.* .................................        9,718,000
136,300             Litton Industries, Inc.* ..............        6,090,906
324,000             Teledyne Technologies Inc.* ...........        9,436,500
464,500             Titan Corp. (The)* ....................        7,664,250
                                                              --------------
                                                                  39,506,206
                                                              --------------
                    Air Freight/Couriers (1.6%)
241,300             C.H. Robinson Worldwide, Inc. .........       13,599,517
113,600             Expeditors International of
                    Washington, Inc. ......................        5,119,100
                                                              --------------
                                                                  18,718,617
                                                              --------------
                    Airlines (0.3%)
 72,000             SkyWest, Inc. .........................        3,690,000
                                                              --------------
                    Apparel/Footwear (0.3%)
 91,000             Kenneth Cole Productions, Inc.
                    (Class A)* ............................        3,213,437
                                                              --------------
                    Auto Parts: O.E.M. (1.0%)
485,900             Gentex Corp.* .........................       12,147,500
                                                              --------------
                    Biotechnology (5.1%)
 77,300             BioTransplant, Inc.* ..................        1,318,931
 97,300             Celgene Corp.* ........................        5,789,350
250,000             Dendreon Corp.* .......................        5,894,531
131,700             ImmunoGen, Inc.* ......................        4,502,494
143,000             Intermune Pharmaceuticals, Inc.*.......        7,757,750
120,000             Myriad Genetics, Inc.* ................       10,320,000
100,000             NeoPharm, Inc.* .......................        3,950,000
113,600             Neurocrine Biosciences, Inc.* .........        5,112,000
113,700             Onyx Pharmaceuticals, Inc.* ...........        2,799,862
 54,800             Progenics Pharmaceuticals, Inc.* ......        1,503,575
 40,600             Regeneration Technologies, Inc.* ......          334,950
137,400             Titan Pharmaceuticals, Inc.* ..........        8,931,000
140,400             Vion Pharmaceuticals, Inc.* ...........        2,509,650
                                                              --------------
                                                                  60,724,093
                                                              --------------


</TABLE>
<TABLE>
<CAPTION>
    NUMBER OF
      SHARES                                                         VALUE
-----------------                                             -------------------
<S>                 <C>                                       <C>
                    Broadcasting (0.5%)
295,300             Westwood One, Inc.* ...................   $    6,330,494
                                                              --------------
                    Building Products (0.1%)
 72,800             Lamson & Sessions Co. (The)* ..........          864,462
                                                              --------------
                    Cable/Satellite TV (0.8%)
190,700             Pegasus Communications Corp.* .........        9,213,194
                                                              --------------
                    Chemicals: Agricultural (0.1%)
 52,400             Eden Bioscience Corp.* ................        1,729,200
                                                              --------------
                    Computer Communications (0.9%)
204,500             Computer Network Technology
                    Corp.* ................................        7,029,687
 71,000             Elastic Networks Inc.* ................          989,562
 63,600             MRV Communications, Inc.* .............        2,881,875
                                                              --------------
                                                                  10,901,124
                                                              --------------
                    Computer Peripherals (3.3%)
391,000             DSP Group, Inc.* ......................       14,613,625
227,500             Electronics for Imaging, Inc.* ........        5,744,375
345,400             M-Systems Flash Disk Pioneers
                    Ltd. (Israel)* ........................       13,189,962
545,200             Maxtor Corp.* .........................        5,724,600
                                                              --------------
                                                                  39,272,562
                                                              --------------
                    Contract Drilling (0.4%)
 48,600             R&B Falcon Corp.* .....................        1,354,725
 87,900             Santa Fe International Corp. ..........        3,960,994
                                                              --------------
                                                                   5,315,719
                                                              --------------
                    Data Processing Services (0.2%)
150,000             Pegasus Solutions, Inc.* ..............        2,934,375
                                                              --------------
                    Discount Stores (0.3%)
110,000             BJ's Wholesale Club, Inc.* ............        3,753,750
                                                              --------------
                    Electrical Products (0.1%)
 27,500             Proton Energy Systems, Inc.* ..........          787,187
                                                              --------------
                    Electronic Components (2.8%)
208,600             APW Ltd. ..............................       10,169,250
133,700             Blue Wave Systems Inc.* ...............          672,678
 81,700             M-Wave, Inc.* .........................        2,129,306
500,000             MEMC Electronic Materials, Inc.*.......        6,437,500
113,800             Methode Electronics, Inc.
                    (Class A) .............................        5,042,762
</TABLE>


                       SEE NOTES TO FINANCIAL STATEMENTS

                                       30


<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
PORTFOLIO OF INVESTMENTS September 30, 2000, continued





<TABLE>
<CAPTION>
    NUMBER OF
      SHARES                                                          VALUE
-----------------                                              -------------------
<S>                 <C>                                        <C>
    250,000         Parthus Technologies PLC
                    (Ireland)* .............................   $      994,545
    136,400         Spectrum Control, Inc.* ................        2,190,925
     47,800         Stratos Lightwave, Inc.* ...............        1,541,550
     27,300         Three-Five Systems, Inc.* ..............          798,525
    112,500         TTM Technologies, Inc.* ................        2,643,750
                                                               --------------
                                                                   32,620,791
                                                               --------------
                    Electronic Equipment/
                    Instruments (1.4%)
    193,300         Lexar Media, Inc.* .....................        2,247,112
    158,000         Zygo Corp.* ............................       13,746,000
                                                               --------------
                                                                   15,993,112
                                                               --------------
                    Electronic Production
                    Equipment (4.4%)
    213,600         Advanced Energy Industries, Inc.*               7,048,800
    169,100         Asyst Technologies, Inc.* ..............        3,424,275
    181,800         ATMI, Inc.* ............................        4,249,575
    495,000         EMCORE Corp.* ..........................       20,581,172
    350,000         inSilicon Corp.* .......................        5,075,000
     45,400         Keithley Instruments, Inc. .............        3,178,000
    320,000         MKS Instruments, Inc.* .................        8,760,000
                                                               --------------
                                                                   52,316,822
                                                               --------------
                    Engineering &
                    Construction (0.4%)
    227,100         SpectraSite Holdings, Inc.* ............        4,215,544
                                                               --------------
                    Finance/Rental/Leasing (0.4%)
    186,400         Comdisco, Inc. .........................        3,553,250
     22,700         Metris Companies, Inc. .................          896,650
                                                               --------------
                                                                    4,449,900
                                                               --------------
                    Household/Personal Care (0.3%)
    154,500         Carter-Wallace, Inc. ...................        3,775,594
                                                               --------------
                    Industrial Machinery (0.3%)
     90,500         Actuant Corp. (Class A) ................          356,344
     75,000         Singulus Technologies AG
                    (Germany) ..............................        3,525,395
                                                               --------------
                                                                    3,881,739
                                                               --------------
                    Information Technology
                    Services (2.1%)
    381,900         Manhattan Associates, Inc.* ............       23,391,375
     91,000         Mediagrif Interactive
                    Technologies (Canada)* .................          808,499
                                                               --------------
                                                                   24,199,874
                                                               --------------
                    Internet Software/Services (1.6%)
     53,400         Art Technology Group, Inc.* ............        5,059,650
    197,500         Digex, Inc.* ...........................        9,257,812


</TABLE>
<TABLE>
<CAPTION>
    NUMBER OF
      SHARES                                                          VALUE
-----------------                                              -------------------
<S>                 <C>                                        <C>
     24,500         Quest Software, Inc.* ..................   $    1,521,680
     90,500         WebEx Communications, Inc.* ............        3,337,187
                                                               --------------
                                                                   19,176,329
                                                               --------------
                    Investment Banks/Brokers (0.6%)
    127,400         AmeriTrade Holding Corp.
                    (Class A)* .............................        2,261,350
     60,500         eSPEED, Inc (Class A)* .................        1,720,469
    104,600         LaBranche & Co., Inc.* .................        3,491,045
                                                               --------------
                                                                    7,472,864
                                                               --------------
                    Medical Distributors (0.6%)
     86,300         Priority Healthcare Corp.
                    (Class B)* .............................        6,580,375
                                                               --------------
                    Medical Specialties (9.9%)
    209,100         ABIOMED, Inc.* .........................       14,244,937
    459,000         ArthroCare Corp.* ......................        8,921,813
    192,100         Coherent, Inc.* ........................       13,062,800
    852,200         Cytyc Corp.* ...........................       36,751,125
     36,400         EPIX Medical, Inc.* ....................          509,600
    206,800         PharmaNetics, Inc.* ....................        3,929,200
    348,500         ResMed, Inc.* ..........................       10,890,625
    352,200         SonoSite, Inc.* ........................        6,581,738
    452,500         Zoll Medical Corp.* ....................       22,059,375
                                                               --------------
                                                                  116,951,213
                                                               --------------
                    Metal Fabrications (1.9%)
    286,700         Maverick Tube Corp.* ...................        7,722,981
    190,800         Precision Castparts Corp. ..............        7,321,950
    104,500         Shaw Group Inc. (The)* .................        7,367,250
                                                               --------------
                                                                   22,412,181
                                                               --------------
                    Miscellaneous
                    Manufacturing (1.1%)
    300,000         Mettler-Toledo International Inc.*......       13,200,000
                                                               --------------
                    Movies/Entertainment (0.6%)
    204,400         Pixar, Inc.* ...........................        6,566,350
                                                               --------------
                    Oil & Gas Production (2.5%)
    199,700         Cabot Oil & Gas Corp. (Class A) ........        4,068,888
  1,110,850         Cross Timbers Royalty Trust ............       21,314,434
    200,000         Forest Oil Corp.* ......................        3,237,500
     54,600         St. Mary Land & Exploration Co..........        1,259,213
                                                               --------------
                                                                   29,880,035
                                                               --------------
                    Oilfield Services/Equipment (0.5%)
     27,300         BJ Services Co.* .......................        1,668,713
    196,750         Grant Prideco, Inc.* ...................        4,316,203
                                                               --------------
                                                                    5,984,916
                                                               --------------
</TABLE>


                       SEE NOTES TO FINANCIAL STATEMENTS

                                       31


<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
PORTFOLIO OF INVESTMENTS September 30, 2000, continued





<TABLE>
<CAPTION>
   NUMBER OF
     SHARES                                                         VALUE
---------------                                              ------------------
<S>               <C>                                        <C>
                  Packaged Software (4.6%)
554,300           Inet Technologies, Inc.* ...............   $   16,213,275
123,500           NetIQ Corp.* ...........................        8,112,406
300,000           Peregine Systems, Inc.* ................        5,681,250
916,200           Project Software & Development,
                  Inc.* ..................................       14,244,047
212,800           SmartForce PLC (ADR) (Ireland)*.........       10,081,400
                                                             --------------
                                                                 54,332,378
                                                             --------------
                  Pharmaceuticals: Generic Drugs (0.2%)
 61,875           Galen Holdings ADR (United
                  Kingdom) ...............................        2,815,313
                                                             --------------
                  Pharmaceuticals: Other (1.3%)
429,500           Connetics Corp.* .......................       10,361,688
109,100           Dura Pharmaceuticals, Inc.* ............        3,859,413
 40,900           Matrix Pharmaceutical, Inc.* ...........          636,506
                                                             --------------
                                                                 14,857,607
                                                             --------------
                  Precious Metals (0.8%)
338,200           Stillwater Mining Co.* .................        9,155,074
                                                             --------------
                  Property - Casualty Insurers (0.4%)
 86,200           Everest Re Group, Ltd. (Bermuda)........        4,266,900
                                                             --------------
                  Publishing: Newspapers (0.1%)
100,000           Metro International S.A. (Class B)
                  (Sweden)* ..............................        1,244,555
                                                             --------------
                  Recreational Products (0.6%)
299,900           Concord Camera Corp.* ..................        7,684,938
                                                             --------------
                  Regional Banks (0.8%)
159,600           Silicon Valley Bancshares* .............        9,294,206
                                                             --------------
                  Semiconductors (5.5%)
131,500           C-Cube Semiconductor Inc.* .............        2,695,750
288,300           Exar Corp.* ............................       34,884,300
  8,500           Micronas Semiconductor Holding
                  AG (Switzerland)* ......................        4,528,083
693,000           Oak Technology, Inc.* ..................       18,970,875
236,300           Tvia, Inc.* ............................        4,238,631
                                                             --------------
                                                                 65,317,639
                                                             --------------
                  Services to the Health Industry (3.3%)
 90,900           Cerner Corp.* ..........................        4,221,169
183,300           IMPATH Inc.* ...........................       11,570,813
161,200           Laboratory Corp. of America
                  Holdings* ..............................       19,303,700
200,000           MDS Inc. (Canada) ......................        4,192,733
                                                             --------------
                                                                 39,288,415
                                                             --------------
                  Specialty Stores (0.5%)
205,900           Cost Plus, Inc.* .......................        6,202,738
                                                             --------------


</TABLE>
<TABLE>
<CAPTION>
   NUMBER OF
     SHARES                                                         VALUE
---------------                                              ------------------
<S>               <C>                                        <C>
                  Specialty Telecommunications (0.8%)
405,000           Evoke Communications Inc.* .............   $    2,657,813
277,800           Pinnacle Holdings Inc.* ................        7,396,425
                                                             --------------
                                                                 10,054,238
                                                             --------------
                  Telecommunication Equipment (3.2%)
168,300           BreezeCom Ltd. (Israel)* ...............        5,543,381
327,000           CommScope, Inc.* .......................        8,011,500
326,100           DDi Corp.* .............................       14,429,925
 70,100           MCK Communications, Inc.* ..............        1,586,013
 72,700           Plantronics, Inc.* .....................        2,762,600
 50,000           Tandberg ASA (Norway)* .................        1,472,693
135,000           Vyyo Inc.* .............................        4,050,000
                                                             --------------
                                                                 37,856,112
                                                             --------------
                  Trucking (0.2%)
 59,000           Landstar Systems, Inc.* ................        2,632,875
                                                             --------------
                  Wireless Communications (1.0%)
 50,000           Clearnet Communications Inc.
                  (Class A) (Canada)* ....................        2,215,625
127,200           Leap Wireless International, Inc.*......        7,957,950
  8,493           RTX Telecom A/S (Denmark) * ............          394,569
 29,600           Tritel, Inc.* ..........................          423,650
                                                             --------------
                                                                 10,991,794
                                                             --------------
                  TOTAL COMMON STOCKS
                  (Cost $649,758,103) ....................      878,885,741
                                                             --------------
</TABLE>




<TABLE>
<CAPTION>
 PRINCIPAL
 AMOUNT IN
 THOUSANDS
-----------
<S>           <C>                                <C>
              CONVERTIBLE BONDS (0.5%)
              Pharmaceuticals: Other (0.4%)
$ 5,010       Dura Pharmaceuticals, Inc.
              3.50% due 07/15/02 .............     4,759,500
                                                 -------------
              Telecommunication
              Equipment (0.1%)
  1,260       Cyras Systems, Inc. - 144A**
              4.50% due 08/15/05 .............     1,512,000
                                                 -------------
              TOTAL CONVERTIBLE BONDS
              (Cost $5,779,125) ..............     6,271,500
                                                 -------------
              SHORT-TERM INVESTMENT (a) (23.8%)
              U.S. GOVERNMENT AGENCY
281,100       Federal National Mortgage Assoc.
              6.32% due 10/02/00
              (Cost $281,050,651) ............   281,050,651
                                                 -------------
</TABLE>


                       SEE NOTES TO FINANCIAL STATEMENTS


                                       32


<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
PORTFOLIO OF INVESTMENTS September 30, 2000, continued



<TABLE>
<CAPTION>
                                                       VALUE
                                                 ----------------
<S>                                 <C>          <C>
TOTAL INVESTMENTS
(Cost $936,587,879) (b) .........       98.5%     1,166,207,892
OTHER ASSETS IN EXCESS OF
LIABILITIES .....................        1.5         17,619,492
                                       -----      -------------
NET ASSETS ......................      100.0%    $1,183,827,384
                                       =====     ==============
</TABLE>



--------------------------------
ADR              American Depository Receipt.
*                Non-income producing security.
**               Resale is restricted to qualified institutional investors.
(a)              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 the aggregate cost for book purposes. The
                 aggregate gross unrealized appreciation is $247,809,978 and
                 the aggregate gross unrealized depreciation is $18,189,965,
                 resulting in net unrealized appreciation of $229,620,013.

FORWARD FOREIGN CURRENCY CONTRACTS OPEN AT
SEPTEMBER 30, 2000:






<TABLE>
<CAPTION>
 CONTRACTS TO           IN            DELIVERY    UNREALIZED
    DELIVER        EXCHANGE FOR         DATE     DEPRECIATION
--------------- -------------------- ----------- -------------
<S>            <C>                  <C>         <C>
 $      730,142 CAD       1,092,000   10/03/00   $ (3,401)
 CAD  3,540,696 $         2,348,876   10/03/00     (7,503)
 DKK  1,440,235 $           169,739   10/04/00       (496)
 THB 44,625,570 $         1,057,227   10/04/00     (1,254)
 GBP    942,611 $         1,380,265   10/06/00     (8,578)
                                                 --------
  Total unrealized depreciation .............    $(21,232)
                                                 ========
</TABLE>


Currency Abbreviations:


CAD      Canadian Dollar.
DKK      Danish Krone.
THB      Thai Bat.
GBP      British Pound.


                       SEE NOTES TO FINANCIAL STATEMENTS


                                       33


<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
FINANCIAL STATEMENTS


STATEMENT OF ASSETS AND LIABILITIES
September 30, 2000





<TABLE>
<CAPTION>
ASSETS:
<S>                                                                          <C>
Investments in securities, at value
  (cost $936,587,879) ....................................................    $1,166,207,892
Cash .....................................................................            50,585
Receivable for:
   Investments sold ......................................................        48,838,230
   Shares of beneficial interest sold ....................................           775,846
   Interest ..............................................................            43,783
   Dividends .............................................................            41,498
Prepaid expenses and other assets ........................................            74,647
                                                                              --------------
   TOTAL ASSETS ..........................................................     1,216,032,481
                                                                              --------------
LIABILITIES:
Unrealized depreciation on open forward foreign currency contracts .......            21,232
Payable for:
   Investments purchased .................................................        26,772,006
   Shares of beneficial interest repurchased .............................         3,827,939
   Plan of distribution fee ..............................................           931,252
   Investment management fee .............................................           491,923
Accrued expenses and other payables ......................................           160,745
                                                                              --------------
   TOTAL LIABILITIES .....................................................        32,205,097
                                                                              --------------
   NET ASSETS ............................................................    $1,183,827,384
                                                                              ==============
COMPOSITION OF NET ASSETS:
Paid-in-capital ..........................................................      $705,278,212
Net unrealized appreciation ..............................................       229,619,960
Accumulated net investment loss ..........................................          (147,357)
Accumulated undistributed net realized gain ..............................       249,076,569
                                                                              --------------
   NET ASSETS ............................................................    $1,183,827,384
                                                                              ==============
CLASS A SHARES:
Net Assets ...............................................................       $44,007,923
Shares Outstanding (unlimited authorized, $.01 par value) ................         1,166,103
   NET ASSET VALUE PER SHARE .............................................            $37.74
                                                                                      ======
  MAXIMUM OFFERING PRICE PER SHARE,
   (net asset value plus 5.54% of net asset value) .......................            $39.83
                                                                                      ======
CLASS B SHARES:
Net Assets ...............................................................    $1,056,116,384
Shares Outstanding (unlimited authorized, $.01 par value) ................        28,778,738
   NET ASSET VALUE PER SHARE .............................................            $36.70
                                                                                      ======
CLASS C SHARES:
Net Assets ...............................................................       $17,006,981
Shares Outstanding (unlimited authorized, $.01 par value) ................           462,691
   NET ASSET VALUE PER SHARE .............................................            $36.76
                                                                                      ======
CLASS D SHARES:
Net Assets ...............................................................       $66,696,096
Shares Outstanding (unlimited authorized, $.01 par value) ................         1,751,874
   NET ASSET VALUE PER SHARE .............................................            $38.07
                                                                                      ======
</TABLE>


                       SEE NOTES TO FINANCIAL STATEMENTS


                                       34


<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
FINANCIAL STATEMENTS, continued


STATEMENT OF OPERATIONS
For the year ended September 30, 2000





<TABLE>
<CAPTION>
NET INVESTMENT LOSS:
<S>                                                           <C>
INCOME
Interest ..................................................   $  5,468,202
Dividends (net of $3,638 foreign withholding tax) .........        706,096
                                                              ------------
   TOTAL INCOME ...........................................      6,174,298
                                                              ------------
EXPENSES
Plan of distribution fee (Class A shares) .................         82,464
Plan of distribution fee (Class B shares) .................     11,379,057
Plan of distribution fee (Class C shares) .................        134,820
Investment management fee .................................      5,906,875
Transfer agent fees and expenses ..........................      1,126,508
Registration fees .........................................        141,879
Shareholder reports and notices ...........................        117,237
Custodian fees ............................................         86,818
Professional fees .........................................         66,501
Trustees' fees and expenses ...............................         17,751
Other .....................................................         13,675
                                                              ------------
   TOTAL EXPENSES .........................................     19,073,585
                                                              ------------
   NET INVESTMENT LOSS ....................................    (12,899,287)
                                                              ------------
NET REALIZED AND UNREALIZED GAIN:
Net realized gain .........................................    287,755,083
Net change in unrealized appreciation .....................     13,083,650
                                                              ------------
   NET GAIN ...............................................    300,838,733
                                                              ------------
NET INCREASE ..............................................   $287,939,446
                                                              ============
</TABLE>






                       SEE NOTES TO FINANCIAL STATEMENTS


                                       35




<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
FINANCIAL STATEMENTS, continued


STATEMENT OF CHANGES IN NET ASSETS






<TABLE>
<CAPTION>
                                                             FOR THE YEAR           FOR THE YEAR
                                                                 ENDED                 ENDED
                                                          SEPTEMBER 30, 2000     SEPTEMBER 30, 1999
---------------------------------------------------------------------------------------------------
<S>                                                      <C>                    <C>
INCREASE (DECREASE) IN NET ASSETS:
OPERATIONS:
Net investment loss ..................................      $  (12,899,287)       $   (7,356,974)
Net realized gain ....................................         287,755,083           153,313,817
Net change in unrealized appreciation ................          13,083,650           165,480,270
                                                            --------------        --------------
   NET INCREASE ......................................         287,939,446           311,437,113
                                                            --------------        --------------
DISTRIBUTIONS TO SHAREHOLDERS FROM NET REALIZED GAIN:
Class A shares .......................................          (3,654,596)             (124,327)
Class B shares .......................................        (161,645,400)          (10,501,816)
Class C shares .......................................          (1,263,910)              (44,486)
Class D shares .......................................          (1,510,969)              (62,639)
                                                            --------------        --------------
   TOTAL DISTRIBUTIONS ...............................        (168,074,875)          (10,733,268)
                                                            --------------        --------------
Net increase (decrease) from transactions in shares of
  beneficial interest ................................         266,972,801          (111,845,093)
                                                            --------------        --------------
   NET INCREASE ......................................         386,837,372           188,858,752
NET ASSETS:
Beginning of period ..................................         796,990,012           608,131,260
                                                            --------------        --------------
   END OF PERIOD
   (Including accumulated net investment losses of
   $147,357 and $45,483, respectively) ...............      $1,183,827,384        $  796,990,012
                                                            ==============        ==============
</TABLE>




                       SEE NOTES TO FINANCIAL STATEMENTS

                                       36



<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
NOTES TO FINANCIAL STATEMENTS September 30, 2000


1. ORGANIZATION AND ACCOUNTING POLICIES

Morgan Stanley Dean Witter Developing Growth Securities Trust (the "Fund") is
registered under the Investment Company Act of 1940, as amended (the "Act"), as
a diversified, open-end management investment company. The Fund's investment
objective is long-term capital growth. The Fund was organized as a
Massachusetts business trust on December 28, 1982 and commenced operations on
April 29, 1983. On July 28, 1997, the Fund converted to a multiple class share
structure.

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 and 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 portfolio security listed or traded
on the New York or American Stock Exchange, NASDAQ, or other exchange is valued
at its latest sale price, prior to the time when assets are valued; if there
were no sales that day, the security is valued at the latest bid price; (2) all
other portfolio securities for which over-the-counter market quotations are
readily available are valued at the latest available bid price; (3) when market
quotations are not readily available, including circumstances under which it is
determined by Morgan Stanley Dean Witter Advisors Inc. (the "Investment
Manager") that sale or 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 (4) 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.



                                       37



<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
NOTES TO FINANCIAL STATEMENTS September 30, 2000, continued


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.
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. 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 ("forward 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. 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.

E. FORWARD FOREIGN CURRENCY CONTRACTS - The Fund may enter into forward
contracts which are valued daily at the appropriate exchange rates. The
resultant unrealized exchange gains and losses are included in the Statement of
Operations. 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.

F. 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.

G. DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS - The Fund records dividends and
distributions to its shareholders on the record 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 tax purposes
are reported as distributions of paid-in-capital.



                                       38



<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
NOTES TO FINANCIAL STATEMENTS September 30, 2000, continued


2. INVESTMENT MANAGEMENT AGREEMENT

Pursuant to an Investment Management Agreement, the Fund pays the Investment
Manager a management fee, accrued daily and payable monthly, by applying the
following annual rates to the net assets of the Fund determined as of the close
of each business day: 0.50% to the portion of the daily net assets not
exceeding $500 million and 0.475% to the portion of the daily net assets
exceeding $500 million.


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 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 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 totaled
$18,337,042 at September 30, 2000.

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 year ended September 30, 2000, the distribution fee was
accrued for Class A shares and Class C shares at the annual rate of 0.24% and
1.0%, respectively.



                                       39




<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
NOTES TO FINANCIAL STATEMENTS September 30, 2000, continued


The Distributor has informed the Fund that for the year ended September 30,
2000, it received contingent deferred sales charges from certain redemptions of
the Fund's Class A shares, Class B shares and Class C shares of $51, $642,814
and $11,297, respectively, and received $93,205, 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 September 30, 2000
aggregated $2,004,444,132, and $2,143,558,930, respectively.

For the year ended September 30, 2000, the Fund incurred $55,512 in brokerage
commissions with Dean Witter Reynolds Inc., an affiliate of the Investment
Manager and Distributor, for portfolio transactions executed on behalf of the
Fund.

For the year ended September 30, 2000, the Fund incurred brokerage commissions
of $48,964 with Morgan Stanley & Co., Inc., an affiliate of the Investment
Manager and Distributor, 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 September 30, 2000, the Fund
had transfer agent fees and expenses payable of approximately $1,200.

The Fund has an unfunded noncontributory defined benefit pension plan covering
all independent Trustees of the Fund who will have served as independent
Trustees for at least five years at the time of retirement. Benefits under this
plan are based on years of service and compensation during the last five years
of service. Aggregate pension costs for the year ended September 30, 2000
included in Trustees' fees and expenses in the Statement of Operations amounted
to $5,937. At September 30, 2000, the Fund had an accrued pension liability of
$46,422 which is included in accrued expenses in the Statement of Assets and
Liabilities.


5. FEDERAL INCOME TAX STATUS

As of September 30, 2000, the Fund had temporary book/tax differences primarily
attributable to capital loss deferrals on wash sales and permanent book/tax
differences primarily attributable to a net operating loss. To reflect
reclassifications arising from the permanent differences, accumulated
undistributed net realized gain was charged and accumulated net investment loss
was credited $12,797,413.



                                       40


<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
NOTES TO FINANCIAL STATEMENTS September 30, 2000, continued


6. SHARES OF BENEFICIAL INTEREST

Transactions in shares of beneficial interest were as follows:





<TABLE>
<CAPTION>
                                                  FOR THE YEAR                      FOR THE YEAR
                                                     ENDED                             ENDED
                                               SEPTEMBER 30, 2000                SEPTEMBER 30, 1999
                                        -------------------------------- ----------------------------------
                                             SHARES          AMOUNT            SHARES           AMOUNT
                                        --------------- ----------------  --------------- ------------------
<S>                                     <C>             <C>               <C>             <C>
CLASS A SHARES
Sold ..................................     1,994,457    $   85,863,075       1,795,565     $   45,961,645
Reinvestment of distributions .........        94,160         3,633,635           5,508            123,765
Redeemed ..............................    (1,407,453)      (61,472,121)     (1,601,819)       (41,473,827)
                                           ----------    --------------      ----------     --------------
Net increase - Class A ................       681,164        28,024,589         199,254          4,611,583
                                           ----------    --------------      ----------     --------------
CLASS B SHARES
Sold ..................................     9,500,562       402,163,034      19,364,899        501,039,654
Reinvestment of distributions .........     4,024,083       151,909,148         444,464          9,880,417
Redeemed ..............................    (9,675,480)     (389,502,655)    (24,437,018)      (628,930,869)
                                           ----------    --------------     -----------     --------------
Net increase (decrease) - Class B .....     3,849,165       164,569,527      (4,627,655)      (118,010,798)
                                           ----------    --------------     -----------     --------------
CLASS C SHARES
Sold ..................................       418,525        18,422,696       1,377,267         36,318,739
Reinvestment of distributions .........        31,863         1,204,735           1,953             43,445
Redeemed ..............................      (140,469)       (5,783,453)     (1,334,660)       (35,381,357)
                                           ----------    --------------     -----------     --------------
Net increase - Class C ................       309,919        13,843,978          44,560            980,827
                                           ----------    --------------     -----------     --------------
CLASS D SHARES
Sold ..................................     2,740,754       112,718,938       2,267,493         57,727,289
Reinvestment of distributions .........        33,389         1,297,173           1,883             42,446
Redeemed ..............................    (1,231,883)      (53,481,404)     (2,220,762)       (57,196,440)
                                           ----------    --------------     -----------     --------------
Net increase - Class D ................     1,542,260        60,534,707          48,614            573,295
                                           ----------    --------------     -----------     --------------
Net increase (decrease) in Fund .......     6,382,508    $  266,972,801      (4,335,227)    $ (111,845,093)
                                           ==========    ==============     ===========     ==============
</TABLE>




                                       41





<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
NOTES TO FINANCIAL STATEMENTS September 30, 2000, continued


7. PURPOSES OF AND RISKS RELATING TO CERTAIN FINANCIAL INSTRUMENTS

The Fund may enter into forward contracts to facilitate settlement of foreign
currency denominated portfolio transactions or to manage foreign currency
exposure associated with foreign currency denominated securities.

Forward contracts involve elements of market risk in excess of the amount
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 from the
potential inability of the counterparties to meet the terms of their contracts.


At September 30, 2000, there were outstanding forward contracts.


                                       42

<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
FINANCIAL HIGHLIGHTS


Selected ratios and per share data for a share of beneficial interest
outstanding throughout each period:





<TABLE>
<CAPTION>
                                                                     FOR THE YEAR ENDED SEPTEMBER 30,
                                                         ---------------------------------------------------------
                                                                2000               1999                1998
                                                         ------------------ ------------------ -------------------
<S>                                                      <C>                <C>                <C>
CLASS A SHARES++

SELECTED PER SHARE DATA:
Net asset value, beginning of period ...................      $31.44             $20.38              $27.50
                                                              ------             -------             -------
Income (loss) from investment operations:
 Net investment loss ...................................       (0.12)             (0.07)              (0.06)
 Net realized and unrealized gain (loss) ...............       12.89              11.50               (4.75)
                                                              ------             ------              ------
Total income (loss) from investment operations .........       12.77              11.43               (4.81)
                                                              ------             ------              ------
Less distributions from net realized gain ..............       (6.47)             (0.37)              (2.31)
                                                              ------             ------              ------
Net asset value, end of period .........................      $37.74             $31.44              $20.38
                                                              =======            ======              ======
TOTAL RETURN+  .........................................       40.16 %            56.81 %            (18.26)%

RATIOS TO AVERAGE NET ASSETS:
Expenses ...............................................        0.85 %(3)          0.90 %(3)           0.94 %(3)
Net investment loss ....................................       (0.35)%(3)         (0.25)%(3)          (0.23)%(3)

SUPPLEMENTAL DATA:
Net assets, end of period, in thousands ................     $44,008            $15,246              $5,822
Portfolio turnover rate ................................         184 %              172 %               178 %



<CAPTION>
                                                            FOR THE PERIOD
                                                            JULY 28, 1997*
                                                               THROUGH
                                                          SEPTEMBER 30, 1997
                                                         -------------------
<S>                                                      <C>
CLASS A SHARES++

SELECTED PER SHARE DATA:
Net asset value, beginning of period ...................        $24.62
                                                                ------
Income (loss) from investment operations:
 Net investment loss ...................................         (0.02)
 Net realized and unrealized gain (loss) ...............          2.90
                                                                ------
Total income (loss) from investment operations .........          2.88
                                                                ------
Less distributions from net realized gain ..............           -
                                                                ------
Net asset value, end of period .........................        $27.50
                                                                ======
TOTAL RETURN+ ..........................................         11.70 %(1)

RATIOS TO AVERAGE NET ASSETS:
Expenses ...............................................          0.99 %(2)
Net investment loss ....................................         (0.46)%(2)

SUPPLEMENTAL DATA:
Net assets, end of period, in thousands ................          $978
Portfolio turnover rate ................................           154 %
</TABLE>



-------------
*      The date shares were first 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.
(3)    Reflects overall Fund ratios for investment income and non-class specific
       expenses.


                       SEE NOTES TO FINANCIAL STATEMENTS

                                       43



<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
FINANCIAL HIGHLIGHTS, continued



<TABLE>
<CAPTION>
                                                          FOR THE YEAR ENDED SEPTEMBER 30,
                                                        -------------------------------------
                                                                2000++            1999++
                                                        ------------------ ------------------
<S>                                                     <C>                <C>
CLASS B SHARES
SELECTED PER SHARE DATA:
Net asset value, beginning of period ..................         $30.90            $20.19
                                                                ------           -------
Income (loss) from investment operations:
 Net investment loss ..................................          (0.44)           (0.27)
 Net realized and unrealized gain (loss) ..............          12.71            11.35
                                                                ------           ------
Total income (loss) from investment operations ........          12.27            11.08
                                                                ------           ------
Less distributions from net realized gain .............          (6.47)           (0.37)
                                                                ------           ------
Net asset value, end of period ........................         $36.70           $30.90
                                                                ======           ======
TOTAL RETURN++ ........................................          39.12 %          55.59 %

RATIOS TO AVERAGE NET ASSETS:
Expenses ..............................................           1.61 %(1)        1.70 %(1)
Net investment loss ...................................          (1.11)%(1)       (1.05)%(1)

SUPPLEMENTAL DATA:
Net assets, end of period, in thousands ...............     $1,056,116         $770,392
Portfolio turnover rate ...............................            184 %            172 %



<CAPTION>
                                                               FOR THE YEAR ENDED SEPTEMBER 30,
                                                        ----------------------------------------------
                                                              1998++           1997*++        1996
                                                        ------------------- ------------ -------------
<S>                                                     <C>                 <C>          <C>
CLASS B SHARES
SELECTED PER SHARE DATA:
Net asset value, beginning of period ..................        $27.46            $27.71       $25.54
                                                               ------            ------       ------
Income (loss) from investment operations:
 Net investment loss ..................................        (0.20)             (0.28)       (0.23)
 Net realized and unrealized gain (loss) ..............        (4.76)              3.92         4.32
                                                              ------             ------       ------
Total income (loss) from investment operations ........        (4.96)              3.64         4.09
                                                              -------            ------       ------
Less distributions from net realized gain .............        (2.31)             (3.89)       (1.92)
                                                              ------             ------       ------
Net asset value, end of period ........................       $20.19             $27.46       $27.71
                                                              ======             ======       ======
TOTAL RETURN++ ........................................       (18.88)%            16.38 %      17.53 %

RATIOS TO AVERAGE NET ASSETS:
Expenses ..............................................         1.69 %(1)          1.68 %       1.69 %
Net investment loss ...................................        (0.98)%(1)         (1.21)%      (1.03)%

SUPPLEMENTAL DATA:
Net assets, end of period, in thousands ...............     $596,834           $877,539     $799,201
Portfolio turnover rate ...............................          178 %              154 %        149 %
</TABLE>



-------------
*   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) Reflects overall Fund ratios for investment income and non-class specific
    expenses.


                       SEE NOTES TO FINANCIAL STATEMENTS



                                       44




<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
FINANCIAL HIGHLIGHTS, continued



<TABLE>
<CAPTION>
                                                                     FOR THE YEAR ENDED SEPTEMBER 30,
                                                         ---------------------------------------------------------
                                                                2000               1999                1998
                                                         ------------------ ------------------ -------------------
<S>                                                      <C>                <C>                <C>
CLASS C SHARES++

SELECTED PER SHARE DATA:
Net asset value, beginning of period ...................      $30.95             $20.19              $27.46
                                                              ------             ------              ------
Income (loss) from investment operations:
 Net investment loss ...................................       (0.42)             (0.25)              (0.23)
 Net realized and unrealized gain (loss) ...............       12.70              11.38               (4.73)
                                                              ------             ------              ------
Total income (loss) from investment operations .........       12.28              11.13               (4.96)
                                                              ------             ------              ------
Less distributions from net realized gain ..............       (6.47)             (0.37)              (2.31)
                                                              ------             ------              ------
Net asset value, end of period .........................      $36.76             $30.95              $20.19
                                                              ======             ======              =======
TOTAL RETURN+ ..........................................       39.09 %            55.84 %            (18.88)%

RATIOS TO AVERAGE NET ASSETS:
Expenses ...............................................        1.61 %(3)          1.58 %(3)           1.69 %(3)
Net investment loss ....................................       (1.11)%(3)         (0.93)%(3)          (0.98)%(3)

SUPPLEMENTAL DATA:
Net assets, end of period, in thousands ................     $17,007             $4,728              $2,185
Portfolio turnover rate ................................         184 %              172 %               178 %



<CAPTION>
                                                            FOR THE PERIOD
                                                            JULY 28, 1997*
                                                               THROUGH
                                                          SEPTEMBER 30, 1997
                                                         -------------------
<S>                                                      <C>
CLASS C SHARES++

SELECTED PER SHARE DATA:
Net asset value, beginning of period ...................       $24.62
                                                               ------
Income (loss) from investment operations:
 Net investment loss ...................................        (0.05)
 Net realized and unrealized gain (loss) ...............         2.89
                                                               ------
Total income (loss) from investment operations .........         2.84
                                                               ------
Less distributions from net realized gain ..............          -
                                                               ------
Net asset value, end of period .........................       $27.46
                                                               ======
TOTAL RETURN+  .........................................        11.54 %(1)

RATIOS TO AVERAGE NET ASSETS:
Expenses ...............................................         1.71 %(2)
Net investment loss ....................................        (1.19)%(2)

SUPPLEMENTAL DATA:
Net assets, end of period, in thousands ................       $1,066
Portfolio turnover rate ................................          154 %
</TABLE>



-------------
*    The date shares were first 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.
(3)  Reflects overall Fund ratios for investment income and non-class specific
     expenses.


                       SEE NOTES TO FINANCIAL STATEMENTS


                                       45




<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
FINANCIAL HIGHLIGHTS, continued



<TABLE>
<CAPTION>
                                                                                                                FOR THE PERIOD
                                                                  FOR THE YEAR ENDED SEPTEMBER 30,              JULY 28, 1997*
                                                         ---------------------------------------------------       THROUGH
                                                                2000               1999             1998      SEPTEMBER 30, 1997
                                                         ------------------ ------------------ ------------- -------------------
<S>                                                      <C>                <C>                <C>           <C>
CLASS D SHARES++

SELECTED PER SHARE DATA:
Net asset value, beginning of period ...................        $31.60            $20.44          $27.51           $24.62
                                                                ------            ------          ------           ------
Income (loss) from investment operations:
 Net investment income (loss) ..........................          0.03             (0.01)           0.01            (0.01)
 Net realized and unrealized gain (loss) ...............         12.91             11.54           (4.77)            2.90
                                                                ------            ------          ------            -----
Total income (loss) from investment operations .........         12.94             11.53           (4.76)            2.89
                                                                ------            ------          ------            -----
Less distributions from net realized gain ..............         (6.47)            (0.37)          (2.31)              -
                                                                ------            ------          ------            -----
Net asset value, end of period .........................        $38.07            $31.60          $20.44           $27.51
                                                                ======            ======          =======          ======
TOTAL RETURN+  .........................................         40.53 %           57.14 %        (18.05)%          11.74 %(1)

RATIOS TO AVERAGE NET ASSETS:
Expenses ...............................................          0.61 %(3)         0.70 %(3)       0.69 %(3)        0.70 %(2)
Net investment income (loss) ...........................         (0.11)%(3)        (0.05)%(3)       0.02 %(3)       (0.20)%(2)

SUPPLEMENTAL DATA:
Net assets, end of period, in thousands ................       $66,696            $6,625          $3,291              $22
Portfolio turnover rate ................................           184 %             172 %           178 %            154 %
</TABLE>



-------------
*   The date shares were first issued.
++  The per share amount 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.
(3) Reflects overall Fund ratios for investment income and non-class specific
    expenses.


                       SEE NOTES TO FINANCIAL STATEMENTS


                                       46

<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
INDEPENDENT AUDITORS' REPORT


TO THE SHAREHOLDERS AND BOARD OF TRUSTEES
OF MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST:

We have audited the accompanying statement of assets and liabilities of Morgan
Stanley Dean Witter Developing Growth Securities Trust (the "Fund"), including
the portfolio of investments, as of September 30, 2000, and the related
statements of operations and changes in net assets, and the financial
highlights for the year then ended. These financial statements and financial
highlights are the responsibility of the Fund's management. Our responsibility
is to express an opinion on these financial statements and financial highlights
based on our audit. The statement of changes in net assets for the year ended
September 30, 1999 and the financial highlights for each of the respective
stated periods ended September 30, 1999 were audited by other independent
accountants whose report, dated November 8, 1999, expressed an unqualified
opinion on that statement and financial highlights.

We conducted our audit in accordance with auditing standards generally accepted
in the United States of America. Those standards require that we plan and
perform the audit to obtain reasonable assurance about whether the financial
statements and financial highlights are free of material misstatement. An audit
includes examining, on a test basis, evidence supporting the amounts and
disclosures in the financial statements. Our procedures included confirmation
of securities owned as of September 30, 2000, by correspondence with the
custodian and brokers. An audit also includes assessing the accounting
principles used and significant estimates made by management, as well as
evaluating the overall financial statement presentation. We believe that our
audit provides a reasonable basis for our opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial position of
Morgan Stanley Dean Witter Developing Growth Securities Trust as of September
30, 2000, the results of its operations, the changes in its net assets, and the
financial highlights for the year then ended, in conformity with accounting
principles generally accepted in the United States of America.

Deloitte & Touche LLP
New York, New York
November 9, 2000


                      2000 FEDERAL TAX NOTICE (unaudited)
      During the fiscal year ended September 30, 2000, the Fund paid to its
      shareholders $3.62 per share from long-term capital gains.

                                       47



<PAGE>

MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
CHANGE IN INDEPENDENT ACCOUNTANTS


On July 1, 2000 PricewaterhouseCoopers LLP resigned as independent accountants
of the Fund.

The reports of PricewaterhouseCoopers LLP on the financial statements of the
Fund for the past two fiscal years contained no adverse opinion or disclaimer
of opinion and were not qualified or modified as to uncertainty, audit scope or
accounting principle.

In connection with its audits for the two most recent fiscal years and through
July 1, 2000, there have been no disagreements with PricewaterhouseCoopers LLP
on any matter of accounting principles or practices, financial statement
disclosure, or auditing scope or procedure, which disagreements if not resolved
to the satisfaction of PricewaterhouseCoopers LLP would have caused them to
make reference thereto in their report on the financial statements for such
years.

The Fund, with the approval of its Board of Trustees and its Audit Committee,
engaged Deloitte & Touche LLP as its new independent accountants as of July 1,
2000.



                                       48






<PAGE>

          MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
                            PART C OTHER INFORMATION

Item 23.   Exhibits
--------   ---------------------------------------------------------------------
1(a).      Declaration of Trust of the Registrant, dated December 28, 1982, is
           incorporated by reference to Exhibit 1(a) of Post-Effective
           Amendment No. 13 to the Registration Statement on Form N-1A, filed
           on November 22, 1995.

1(b).      Amendment, dated January 11, 1983, to the Declaration of Trust of the
           Registrant is incorporated by reference to Exhibit 1(b) of
           Post-Effective Amendment No. 13 to the Registration Statement on Form
           N-1A, filed on November 22, 1995.

1(c).      Amendment, dated May 18, 1984, to the Declaration of Trust of the
           Registrant is incorporated by reference to Exhibit 1(c) of
           Post-Effective Amendment No. 13 to the Registration Statement on Form
           N-1A, filed on November 22, 1995.

1(d).      Amendment, dated July 18, 1984, to the Declaration of Trust of the
           Registrant is incorporated by reference to Exhibit 1(d) of
           Post-Effective Amendment No. 13 to the Registration Statement on Form
           N-1A, filed on November 22, 1995.

1(e).      Instrument Establishing and Designating Additional Classes of Shares,
           dated July 28, 1997, is incorporated by reference to Exhibit 1 of
           Post-Effective Amendment No. 15 to the Registration Statement on Form
           N-1A, filed on July 10, 1997.

1(f).      Amendment, dated June 22, 1998, to the Declaration of Trust of the
           Registrant is incorporated by reference to Exhibit 1 of
           Post-Effective Amendment No. 17 to the Registration Statement on Form
           N-1A, filed on November 24, 1998.

2.         Amended and Restated By-Laws of the Registrant, dated May 1, 1999, is
           incorporated by reference to Exhibit 2 of Post-Effective Amendment
           No. 18 to the Registration Statement on Form N-1A, filed on
           September 28, 1999.

3.         Not applicable.

4.         Amended Investment Management Agreement between the Registrant and
           Morgan Stanley Dean Witter Advisors Inc., dated April 30, 1998, is
           incorporated by reference to Exhibit 5 of Post-Effective Amendment
           No. 17 to the Registration Statement on Form N-1A, filed on
           November 24, 1998.

<PAGE>

5(a).      Amended Distribution Agreement between the Registrant and Morgan
           Stanley Dean Witter Distributors Inc., dated June 22, 1998, is
           incorporated by reference to Exhibit 6(a) of Post-Effective Amendment
           No. 17 to the Registration Statement on Form N-1A, filed on
           November 24, 1998.

5(b).      Selected Dealer Agreement between Morgan Stanley Dean Witter
           Distributors Inc. and Dean Witter Reynolds Inc., dated January 4,
           1993, is incorporated by reference to Exhibit 6 of Post-Effective
           Amendment No. 12 to the Registration Statement on Form N-1A, filed on
           November 21, 1994.

5(c).      Omnibus Selected Dealer Agreement between Morgan Stanley Dean Witter
           Distributors Inc. and National Financial Services Corporation, dated
           October 17, 1998, is incorporated by reference to Exhibit 6 (b) of
           Post-Effective Amendment No. 17 to the Registration Statement on Form
           N-1A, filed on November 24, 1998.

6.         Amended and Restated Retirement Plan for Non-Interested Trustees or
           Directors, dated May 8, 1997, is incorporated by reference to Exhibit
           7(a) of Post-Effective Amendment No. 18 to the Registration Statement
           on Form N-1A, filed on September 28, 1999.

7(a).      Custodian Agreement between The Bank of New York and the Registrant,
           dated September 20, 1991, is incorporated by reference to Exhibit 8
           of Post-Effective Amendment No. 13 to the Registration Statement on
           Form N-1A, filed on November 22, 1995.

7(b).      Amendment to the Custody Agreement, dated April 17, 1996, is
           incorporated by reference to Exhibit 8 of Post-Effective Amendment
           No. 14 to the Registration Statement on Form N-1A, filed on
           November 21, 1996.

8(a).      Amended and Restated Transfer Agency and Services Agreement between
           the Registrant and Morgan Stanley Dean Witter Trust FSB, dated
           September 1, 2000, filed herein.

8(b).      Amended Services Agreement between Morgan Stanley Dean Witter
           Advisors Inc. and Morgan Stanley Dean Witter Services Company Inc.,
           dated June 22, 1998, is incorporated by reference to Exhibit 9 of
           Post-Effective Amendment No. 17 to the Registration Statement on Form
           N-1A, filed on November 24, 1998.

9(a).      Opinion of Sheldon Curtis, Esq., dated March 3, 1983, is incorporated
           by reference to Exhibit 9(a) of Post-Effective Amendment No. 18 to
           the Registration Statement on Form N-1A, filed on September 28, 1999.

<PAGE>

9(b).      Opinion of Gaston Snow & Ely Bartlett, Massachusetts Counsel, dated
           March 2, 1983, is incorporated by reference to Exhibit 9(b) of
           Post-Effective Amendment No. 18 to the Registration Statement on Form
           N-1A, filed on September 28, 1999.

10(a).     Consent of Independent Auditors, filed herein.

10(b).     Consent of PricewaterhouseCoopers LLP, filed herein.

11.        Not applicable.

12.        Not applicable.

13.        Amended and Restated Plan of Distribution pursuant to Rule 12b-1
           between the Registrant and Morgan Stanley Dean Witter Distributors
           Inc., dated July 28, 1997, is incorporated by reference to Exhibit 15
           of Post-Effective Amendment No. 15 to the Registration Statement on
           Form N-1A, filed on July 10, 1997.

15.        Amended and Restated Multiple Class Plan pursuant to Rule 18f-3,
           dated August 15, 2000, filed herein.

16(a).     Code of Ethics of Morgan Stanley Dean Witter Advisors Inc., Morgan
           Stanley Dean Witter Services Company Inc. and Morgan Stanley Dean
           Witter Distributors Inc., filed herein.

16(b).     Code of Ethics of the Morgan Stanley Dean Witter Funds, filed herein

Other.     Powers of Attorney of Trustees are incorporated by reference to
           Exhibit (Other) of Post-Effective Amendment No. 12 to the
           Registration Statement on Form N-1A, filed on November 21, 1994 and
           Exhibit (Other) of Post-Effective Amendment No. 16 to the
           Registration Statement on Form N-1A, filed on October 25, 1997. Power
           of Attorney for James F. Higgins, filed herein.

<PAGE>

Item 24. Persons Controlled by or Under Common Control with the Fund.

         None

Item 25. Indemnification.

         Pursuant to Section 5.3 of the Registrant's Declaration of Trust and
under Section 4.8 of the Registrant's By-Laws, the indemnification of the
Registrant's trustees, officers, employees and agents is permitted if it is
determined that they acted under the belief that their actions were in or not
opposed to the best interest of the Registrant, and, with respect to any
criminal proceeding, they had reasonable cause to believe their conduct was not
unlawful. In addition, indemnification is permitted only if it is determined
that the actions in question did not render them liable by reason of willful
misfeasance, bad faith or gross negligence in the performance of their duties or
by reason of reckless disregard of their obligations and duties to the
Registrant. Trustees, officers, employees and agents will be indemnified for the
expense of litigation if it is determined that they are entitled to
indemnification against any liability established in such litigation. The
Registrant may also advance money for these expenses provided that they give
their undertakings to repay the Registrant unless their conduct is later
determined to permit indemnification.

         Pursuant to Section 5.2 of the Registrant's Declaration of Trust and
paragraph 8 of the Registrant's Investment Management Agreement, neither the
Investment Manager nor any trustee, officer, employee or agent of the Registrant
shall be liable for any action or failure to act, except in the case of bad
faith, willful misfeasance, gross negligence or reckless disregard of duties to
the Registrant.

         Insofar as indemnification for liabilities arising under the Securities
Act of 1933 (the "Act") may be permitted to trustees, officers and controlling
persons of the Registrant pursuant to the foregoing provisions or otherwise, the
Registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the Act
and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a trustee, officer, or controlling person of the Registrant
in connection with the successful defense of any action, suit or proceeding) is
asserted against the Registrant by such trustee, officer or controlling person
in connection with the shares being registered, the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such
indemnification by it is against public policy as expressed in the Act, and will
be governed by the final adjudication of such issue.

         The Registrant hereby undertakes that it will apply the indemnification
provision of its by-laws in a manner consistent with Release 11330 of the
Securities and Exchange Commission under the Investment Company Act of 1940, so
long as the interpretation of Sections 17(h) and 17(i) of such Act remains in
effect.

         Registrant, in conjunction with the Investment Manager, Registrant's
Trustees, and other registered investment management companies managed by the
Investment Manager, maintains insurance on behalf of any person who is or was a
Trustee, officer, employee, or agent of Registrant, or who is or was serving at
the request of Registrant as a trustee, director,

<PAGE>

officer, employee or agent of another trust or corporation, against any
liability asserted against him and incurred by him or arising out of his
position. However, in no event will Registrant maintain insurance to indemnify
any such person for any act for which Registrant itself is not permitted to
indemnify him.

Item 26. Business and Other Connections of Investment Advisor

         See "The Fund and Its Management" in the Prospectus regarding the
business of the investment advisor. The following information is given regarding
officers of Morgan Stanley Dean Witter Advisors Inc. ("MSDW Advisors"). MSDW
Advisors is a wholly-owned subsidiary of Morgan Stanley Dean Witter & Co.

         The term "Morgan Stanley Dean Witter Funds" refers to the following
registered investment companies:

Closed-End Investment Companies
-------------------------------
(1)     Morgan Stanley Dean Witter California Insured Municipal Income Trust
(2)     Morgan Stanley Dean Witter California Quality Municipal Securities
(3)     Morgan Stanley Dean Witter Government Income Trust
(4)     Morgan Stanley Dean Witter High Income Advantage Trust
(5)     Morgan Stanley Dean Witter High Income Advantage Trust II
(6)     Morgan Stanley Dean Witter High Income Advantage Trust III
(7)     Morgan Stanley Dean Witter Income Securities Inc.
(8)     Morgan Stanley Dean Witter Insured California Municipal Securities
(9)     Morgan Stanley Dean Witter Insured Municipal Bond Trust
(10)    Morgan Stanley Dean Witter Insured Municipal Income Trust
(11)    Morgan Stanley Dean Witter Insured Municipal Securities
(12)    Morgan Stanley Dean Witter Insured Municipal Trust
(13)    Morgan Stanley Dean Witter Municipal Income Opportunities Trust
(14)    Morgan Stanley Dean Witter Municipal Income Opportunities Trust II
(15)    Morgan Stanley Dean Witter Municipal Income Opportunities Trust III
(16)    Morgan Stanley Dean Witter Municipal Income Trust
(17)    Morgan Stanley Dean Witter Municipal Income Trust II
(18)    Morgan Stanley Dean Witter Municipal Income Trust III
(19)    Morgan Stanley Dean Witter Municipal Premium Income Trust
(20)    Morgan Stanley Dean Witter New York Quality Municipal Securities
(21)    Morgan Stanley Dean Witter Prime Income Trust
(22)    Morgan Stanley Dean Witter Quality Municipal Income Trust
(23)    Morgan Stanley Dean Witter Quality Municipal Investment Trust
(24)    Morgan Stanley Dean Witter Quality Municipal Securities

Open-end Investment Companies
-----------------------------
(1)     Active Assets California Tax-Free Trust
(2)     Active Assets Government Securities Trust
(3)     Active Assets Institutional Money Trust
(4)     Active Assets Money Trust
(5)     Active Assets Premier Money Trust
(6)     Active Assets Tax-Free Trust
(7)     Morgan Stanley Dean Witter 21st Century Trend Fund
(8)     Morgan Stanley Dean Witter Aggressive Equity Fund
(9)     Morgan Stanley Dean Witter American Opportunities Fund

<PAGE>

(10)    Morgan Stanley Dean Witter Balanced Growth Fund
(11)    Morgan Stanley Dean Witter Balanced Income Fund
(12)    Morgan Stanley Dean Witter California Tax-Free Daily Income Trust
(13)    Morgan Stanley Dean Witter California Tax-Free Income Fund
(14)    Morgan Stanley Dean Witter Capital Growth Securities
(15)    Morgan Stanley Dean Witter Competitive Edge Fund, "Best Ideas Portfolio"
(16)    Morgan Stanley Dean Witter Convertible Securities Trust
(17)    Morgan Stanley Dean Witter Developing Growth Securities Trust
(18)    Morgan Stanley Dean Witter Diversified Income Trust
(19)    Morgan Stanley Dean Witter Dividend Growth Securities Inc.
(20)    Morgan Stanley Dean Witter Equity Fund
(21)    Morgan Stanley Dean Witter European Growth Fund Inc.
(22)    Morgan Stanley Dean Witter Federal Securities Trust
(23)    Morgan Stanley Dean Witter Financial Services Trust
(24)    Morgan Stanley Dean Witter Fund of Funds
(25)    Morgan Stanley Dean Witter Global Dividend Growth Securities
(26)    Morgan Stanley Dean Witter Global Utilities Fund
(27)    Morgan Stanley Dean Witter Growth Fund
(28)    Morgan Stanley Dean Witter Hawaii Municipal Trust
(29)    Morgan Stanley Dean Witter Health Sciences Trust
(30)    Morgan Stanley Dean Witter High Yield Securities Inc.
(31)    Morgan Stanley Dean Witter Income Builder Fund
(32)    Morgan Stanley Dean Witter Information Fund
(33)    Morgan Stanley Dean Witter Intermediate Income Securities
(34)    Morgan Stanley Dean Witter International Fund
(35)    Morgan Stanley Dean Witter International SmallCap Fund
(36)    Morgan Stanley Dean Witter Japan Fund
(37)    Morgan Stanley Dean Witter Latin American Growth Fund
(38)    Morgan Stanley Dean Witter Limited Term Municipal Trust
(39)    Morgan Stanley Dean Witter Liquid Asset Fund Inc.
(40)    Morgan Stanley Dean Witter Market Leader Trust
(41)    Morgan Stanley Dean Witter Mid-Cap Equity Trust
(42)    Morgan Stanley Dean Witter Multi-State Municipal Series Trust
(43)    Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
(44)    Morgan Stanley Dean Witter New Discoveries Fund
(45)    Morgan Stanley Dean Witter New York Municipal Money Market Trust
(46)    Morgan Stanley Dean Witter New York Tax-Free Income Fund
(47)    Morgan Stanley Dean Witter Next Generation Trust
(48)    Morgan Stanley Dean Witter North American Government Income Trust
(49)    Morgan Stanley Dean Witter Pacific Growth Fund Inc.
(50)    Morgan Stanley Dean Witter Real Estate Fund
(51)    Morgan Stanley Dean Witter S&P 500 Index Fund
(52)    Morgan Stanley Dean Witter S&P 500 Select Fund
(53)    Morgan Stanley Dean Witter Select Dimensions Investment Series
(54)    Morgan Stanley Dean Witter Select Municipal Reinvestment Fund
(55)    Morgan Stanley Dean Witter Short-Term Bond Fund
(56)    Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust
(57)    Morgan Stanley Dean Witter Small Cap Growth Fund
(58)    Morgan Stanley Dean Witter Special Value Fund
(59)    Morgan Stanley Dean Witter Strategist Fund
(60)    Morgan Stanley Dean Witter Tax-Exempt Securities Trust

<PAGE>

(61)    Morgan Stanley Dean Witter Tax-Free Daily Income Trust
(62)    Morgan Stanley Dean Witter Tax-Managed Growth Fund
(63)    Morgan Stanley Dean Witter Technology Fund
(64)    Morgan Stanley Dean Witter Total Market Index Fund
(65)    Morgan Stanley Dean Witter Total Return Trust
(66)    Morgan Stanley Dean Witter U.S. Government Money Market Trust
(67)    Morgan Stanley Dean Witter U.S. Government Securities Trust
(68)    Morgan Stanley Dean Witter Utilities Fund
(69)    Morgan Stanley Dean Witter Value-Added Market Series
(70)    Morgan Stanley Dean Witter Value Fund
(71)    Morgan Stanley Dean Witter Variable Investment Series
(72)    Morgan Stanley Dean Witter World Wide Income Trust

NAME AND POSITION WITH          OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN             OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.            AND NATURE OF CONNECTION
--------------------            ------------------------------------------------

Mitchell M. Merin               President and Chief Operating Officer of Asset
President, Chief                Management of Morgan Stanley Dean Witter & Co.
Executive Officer and           ("MSDW); Chairman, Chief Executive Officer and
Director                        Director of Morgan Stanley Dean Witter
                                Distributors Inc. ("MSDW Distributors") and
                                Morgan Stanley Dean Witter Trust FSB ("MSDW
                                Trust"); President, Chief Executive Officer and
                                Director of Morgan Stanley Dean Witter Services
                                Company Inc. ("MSDW Services"); President of the
                                Morgan Stanley Dean Witter Funds; Executive Vice
                                President and Director of Dean Witter Reynolds
                                Inc. ("DWR"); Director of various MSDW
                                subsidiaries; Trustee of various Van Kampen
                                investment companies.

Barry Fink                      General Counsel of Asset Management of MSDW;
Executive Vice President,       Executive Vice President, Secretary, General
Secretary, General Counsel      Counsel and Director of MSDW Services; Vice
and Director                    President and Secretary of MSDW Distributors;
                                Vice President, Secretary and General Counsel of
                                the Morgan Stanley Dean Witter Funds.

Joseph J. McAlinden             Vice President of the Morgan Stanley Dean Witter
Executive Vice President        Funds; Director of MSDW Trust.
and Chief Investment
Officer

Ronald E. Robison               Executive Vice President, Chief Administrative
Executive Vice President,       Officer and Director of MSDW Services; Vice
Chief Administrative            President of the Morgan Stanley Dean Witter
Officer and Director            Funds.

<PAGE>

NAME AND POSITION WITH          OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN             OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.            AND NATURE OF CONNECTION
--------------------            ------------------------------------------------

Edward C. Oelsner, III
Executive Vice President

Joseph R. Arcieri               Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.

Peter M. Avelar                 Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.
and Director of the High
Yield Group

Mark Bavoso                     Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.

Douglas Brown
Senior Vice President

Rosalie Clough
Senior Vice President
and Director of Marketing

Richard G. DeSalvo
Senior Vice President
and Director of Investment
Management Services

Richard Felegy
Senior Vice President

Sheila A. Finnerty              Vice President of Morgan Stanley Dean Witter
Senior Vice President           Prime Income Trust.

Edward F. Gaylor                Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.
Director of the Research
Group

Robert S. Giambrone             Senior Vice President of MSDW Services, MSDW
Senior Vice President           Distributors and MSDW Trust and Director of MSDW
                                Trust; Vice President of the Morgan Stanley Dean
                                Witter Funds.

Rajesh K. Gupta                 Vice President of various Morgan Stanley Dean
Senior Vice President,          Witter Funds.
Director of the Taxable
Fixed Income Group and
Chief Administrative Officer -
Investments

<PAGE>

NAME AND POSITION WITH          OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN             OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.            AND NATURE OF CONNECTION
--------------------            ------------------------------------------------

Kenton J. Hinchliffe            Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.

Kevin Hurley                    Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.

Jenny Beth Jones                Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.

Michelle Kaufman                Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.

John B. Kemp, III               President of MSDW Distributors.
Senior Vice President

Anita H. Kolleeny               Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.
and Director of Sector
Rotation

Jonathan R. Page                Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.
and Director of the Money
Market Group

Ira N. Ross                     Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.

Guy G. Rutherfurd, Jr.          Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.
and Director of the Growth
Group

Rochelle G. Siegel              Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.

James Solloway Jr.
Senior Vice President

Katherine H. Stromberg          Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.

Paul D. Vance                   Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.
and Director of the Growth
and Income Group

<PAGE>

NAME AND POSITION WITH          OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN             OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.            AND NATURE OF CONNECTION
--------------------            ------------------------------------------------

Elizabeth A. Vetell
Senior Vice President
and Director of Shareholder
Communication

James F. Willison               Vice President of various Morgan Stanley Dean
Senior Vice President           Witter Funds.
and Director of the
Tax-Exempt Fixed
Income Group

Raymond A. Basile
First Vice President

Thomas F. Caloia                First Vice President and Assistant Treasurer of
First Vice President            MSDW Services; Assistant Treasurer of MSDW
and Assistant                   Distributors; Treasurer and Chief Financial and
Treasurer                       Accounting Officer of the Morgan Stanley Dean
                                Witter Funds.

Thomas Chronert
First Vice President

Richard Colville                First Vice President and Controller of MSDW
First Vice President            Services; Assistant Treasurer of MSDW
and Controller                  Distributors; First Vice President and Treasurer
                                of MSDW Trust.

Marilyn K. Cranney              Assistant Secretary of DWR; First Vice President
First Vice President            and Assistant Secretary of MSDW Services;
and Assistant Secretary         Assistant Secretary of MSDW Distributors and the
                                Morgan Stanley Dean Witter Funds.

Salvatore DeSteno               First Vice President of MSDW Services.
First Vice President

Peter W. Gurman
First Vice President

David Johnson
First Vice President

Stanley Kapica
First Vice President

Douglas J. Ketterer
First Vice President

<PAGE>

NAME AND POSITION WITH          OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN             OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.            AND NATURE OF CONNECTION
--------------------            ------------------------------------------------

Todd Lebo                       First Vice President and Assistant Secretary of
First Vice President and        MSDW Services; Assistant Secretary of MSDW
Assistant Secretary             Distributors and the Morgan Stanley Dean Witter
                                Funds.

Lou Anne D. McInnis             First Vice President and Assistant Secretary of
First Vice President and        MSDW Services; Assistant Secretary of MSDW
Assistant Secretary             Distributors and the Morgan Stanley Dean Witter
                                Funds.

Carsten Otto                    First Vice President and Assistant Secretary of
First Vice President            MSDW Services; Assistant Secretary of MSDW
and Assistant Secretary         Distributors and the Morgan Stanley Dean Witter
                                Funds.

Carl F. Sadler
First Vice President

Ruth Rossi                      First Vice President and Assistant Secretary of
First Vice President and        MSDW Services; Assistant Secretary of MSDW
Assistant Secretary             Distributors and the Morgan Stanley Dean Witter
                                Funds.

James P. Wallin
First Vice President

Robert Abreu
Vice President

Dale Albright
Vice President

Joan G. Allman
Vice President

Andrew Arbenz                   Vice President of Morgan Stanley Dean Witter
Vice President                  Global Utilities Fund.

Sean Aurigemma
Vice President

Armon Bar-Tur                   Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

Thomas A. Bergeron
Vice President

Philip Bernstein
Vice President

<PAGE>

NAME AND POSITION WITH          OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN             OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.            AND NATURE OF CONNECTION
--------------------            ------------------------------------------------

Dale Boettcher
Vice President

Michelina Calandrella
Vice President

Ronald Caldwell
Vice President

Joseph Cardwell
Vice President

Christie Carr-Waldron
Vice President

Liam Carroll
Vice President

Philip Casparius
Vice President

Annette Celenza
Vice President

Aaron Clark                     Vice President of Morgan Stanley Dean Witter
Vice President                  Market Leader Trust

William Connerly
Vice President

Virginia Connors
Vice President

Michael J. Davey
Vice President

David Dineen                    Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

June Ewers
Vice President

Jeffrey D. Geffen               Vice President of Morgan Stanley Dean Witter
Vice President                  U.S. Government Securities Trust

<PAGE>

NAME AND POSITION WITH          OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN             OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.            AND NATURE OF CONNECTION
--------------------            ------------------------------------------------

Sandra Gelpieryn
Vice President

Charmaine George
Vice President

Michael Geringer
Vice President

Gail Gerrity Burke
Vice President

Peter Gewirtz
Vice President

Mina Gitsevich
Vice President

Ellen Gold
Vice President

Amy Golub
Vice President

Stephen Greenhut
Vice President

Joan Hamilton
Vice President

Trey Hancock
Vice President

Matthew T. Haynes               Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

Peter Hermann Jr.               Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

David T. Hoffman
Vice President

Thomas G. Hudson II
Vice President

<PAGE>

NAME AND POSITION WITH          OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN             OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.            AND NATURE OF CONNECTION
--------------------            ------------------------------------------------

Linda Jones
Vice President

Norman Jones
Vice President

Kevin Jung                      Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

Carol Espejo-Kane
Vice President

Nancy Karole Kennedy
Vice President

Paula LaCosta                   Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

Kimberly LaHart
Vice President

Thomas Lawlor
Vice President

Lester Lay
Vice President

Phuong Le
Vice President

Gerard J. Lian                  Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

Cameron J. Livingstone
Vice President

Nancy Login Cole
Vice President

Sharon Loguercio
Vice President

Stephanie Lovinger
Vice President

<PAGE>

NAME AND POSITION WITH          OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN             OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.            AND NATURE OF CONNECTION
--------------------            ------------------------------------------------

Steven MacNamara
Vice President

Catherine Maniscalco            Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

Peter R. McDowell
Vice President

Albert McGarity
Vice President

Teresa McRoberts                Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

Mark Mitchell
Vice President

Thomas Moore
Vice President

Julie Morrone                   Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

Mary Beth Mueller
Vice President

David Myers                     Vice President of Morgan Stanley Dean Witter
Vice President                  Natural Resource Development Securities Inc.

James Nash
Vice President

Daniel Niland
Vice President

Richard Norris
Vice President

Hilary A. O'Neill
Vice President

Steven Orlov
Vice President

<PAGE>

NAME AND POSITION WITH          OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN             OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.            AND NATURE OF CONNECTION
--------------------            ------------------------------------------------

Mori Paulsen
Vice President

Anne Pickrell
Vice President

Reginald Rigaud
Vice President

Frances Roman
Vice President

Dawn Rorke
Vice President

John Roscoe                     Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

Hugh Rose
Vice President

Robert Rossetti                 Vice President of Morgan Stanley Dean Witter
Vice President                  Competitive Edge Fund.

Sally Sancimino                 Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

Deborah Santaniello
Vice President

Patrice Saunders
Vice President

Donna Savoca
Vice President

Howard A. Schloss               Vice President of Morgan Stanley Dean Witter
Vice President                  Federal Securities Trust.

Alison M. Sharkey
Vice President

Peter J. Seeley                 Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

<PAGE>

NAME AND POSITION WITH          OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN             OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.            AND NATURE OF CONNECTION
--------------------            ------------------------------------------------

Ronald B. Silvestri             Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

Herbert Simon
Vice President

Martha Slezak
Vice President

Frank Smith
Vice President

Otha Smith
Vice President

Stuart Smith
Vice President

Robert Stearns
Vice President

Naomi Stein
Vice President

William Stevens
Vice President

Michael Strayhorn
Vice President

Marybeth Swisher
Vice President

Michael Thayer
Vice President

Bradford Thomas
Vice President

Barbara Toich
Vice President

Robert Vanden Assem
Vice President

<PAGE>

NAME AND POSITION WITH          OTHER SUBSTANTIAL BUSINESS, PROFESSION, VOCATION
MORGAN STANLEY DEAN             OR EMPLOYMENT, INCLUDING NAME, PRINCIPAL ADDRESS
WITTER ADVISORS INC.            AND NATURE OF CONNECTION
--------------------            ------------------------------------------------

Frank Vindigni
Vice President

David Walsh
Vice President

Alice Weiss                     Vice President of various Morgan Stanley Dean
Vice President                  Witter Funds.

John Wong
Vice President

         The principal address of MSDW Advisors, MSDW Services, MSDW
Distributors, DWR, and the Morgan Stanley Dean Witter Funds is Two World Trade
Center, New York, New York 10048. The principal address of MSDW is 1585
Broadway, New York, New York 10036. The principal address of MSDW Trust is 2
Harborside Financial Center, Jersey City, New Jersey 07311.

Item 27. Principal Underwriters

(a) Morgan Stanley Dean Witter Distributors Inc. ("MSDW Distributors"), a
Delaware corporation, is the principal underwriter of the Registrant. MSDW
Distributors is also the principal underwriter of the following investment
companies:

(1)    Active Assets California Tax-Free Trust
(2)    Active Assets Government Securities Trust
(3)    Active Assets Institutional Money Trust
(4)    Active Assets Money Trust
(5)    Active Assets Premier Money Trust
(6)    Active Assets Tax-Free Trust
(7)    Morgan Stanley Dean Witter 21st Century Trend Fund
(8)    Morgan Stanley Dean Witter Aggressive Equity Fund
(9)    Morgan Stanley Dean Witter American Opportunities Fund
(10)   Morgan Stanley Dean Witter Balanced Growth Fund
(11)   Morgan Stanley Dean Witter Balanced Income Fund
(12)   Morgan Stanley Dean Witter California Tax-Free Daily Income Trust
(13)   Morgan Stanley Dean Witter California Tax-Free Income Fund
(14)   Morgan Stanley Dean Witter Capital Growth Securities
(15)   Morgan Stanley Dean Witter Competitive Edge Fund, "Best Ideas Portfolio"
(16)   Morgan Stanley Dean Witter Convertible Securities Trust
(17)   Morgan Stanley Dean Witter Developing Growth Securities Trust
(18)   Morgan Stanley Dean Witter Diversified Income Trust
(19)   Morgan Stanley Dean Witter Dividend Growth Securities Inc.
(20)   Morgan Stanley Dean Witter Equity Fund
(21)   Morgan Stanley Dean Witter European Growth Fund Inc.
(22)   Morgan Stanley Dean Witter Federal Securities Trust

<PAGE>

(23)   Morgan Stanley Dean Witter Financial Services Trust
(24)   Morgan Stanley Dean Witter Fund of Funds
(25)   Morgan Stanley Dean Witter Global Dividend Growth Securities
(26)   Morgan Stanley Dean Witter Global Utilities Fund
(27)   Morgan Stanley Dean Witter Growth Fund
(28)   Morgan Stanley Dean Witter Hawaii Municipal Trust
(29)   Morgan Stanley Dean Witter Health Sciences Trust
(30)   Morgan Stanley Dean Witter High Yield Securities Inc.
(31)   Morgan Stanley Dean Witter Income Builder Fund
(32)   Morgan Stanley Dean Witter Information Fund
(33)   Morgan Stanley Dean Witter Intermediate Income Securities
(34)   Morgan Stanley Dean Witter International Fund
(35)   Morgan Stanley Dean Witter International SmallCap Fund
(36)   Morgan Stanley Dean Witter Japan Fund
(37)   Morgan Stanley Dean Witter Latin American Growth Fund
(38)   Morgan Stanley Dean Witter Limited Term Municipal Trust
(39)   Morgan Stanley Dean Witter Liquid Asset Fund Inc.
(40)   Morgan Stanley Dean Witter Market Leader Trust
(41)   Morgan Stanley Dean Witter Mid-Cap Equity Trust
(42)   Morgan Stanley Dean Witter Multi-State Municipal Series Trust
(43)   Morgan Stanley Dean Witter Natural Resource Development Securities Inc.
(44)   Morgan Stanley Dean Witter New Discoveries Fund
(45)   Morgan Stanley Dean Witter New York Municipal Money Market Trust
(46)   Morgan Stanley Dean Witter New York Tax-Free Income Fund
(47)   Morgan Stanley Dean Witter Next Generation Trust
(48)   Morgan Stanley Dean Witter North American Government Income Trust
(49)   Morgan Stanley Dean Witter Pacific Growth Fund Inc.
(50)   Morgan Stanley Dean Witter Prime Income Trust
(51)   Morgan Stanley Dean Witter Real Estate Fund
(52)   Morgan Stanley Dean Witter S&P 500 Index Fund
(53)   Morgan Stanley Dean Witter S&P 500 Select Fund
(54)   Morgan Stanley Dean Witter Short-Term Bond Fund
(55)   Morgan Stanley Dean Witter Short-Term U.S. Treasury Trust
(56)   Morgan Stanley Dean Witter Small Cap Growth Fund
(57)   Morgan Stanley Dean Witter Special Value Fund
(58)   Morgan Stanley Dean Witter Strategist Fund
(59)   Morgan Stanley Dean Witter Tax-Exempt Securities Trust
(60)   Morgan Stanley Dean Witter Tax-Free Daily Income Trust
(61)   Morgan Stanley Dean Witter Tax-Managed Growth Fund
(62)   Morgan Stanley Dean Witter Technology Fund
(63)   Morgan Stanley Dean Witter Total Market Index Fund
(64)   Morgan Stanley Dean Witter Total Return Trust
(65)   Morgan Stanley Dean Witter U.S. Government Money Market Trust
(66)   Morgan Stanley Dean Witter U.S. Government Securities Trust
(67)   Morgan Stanley Dean Witter Utilities Fund
(68)   Morgan Stanley Dean Witter Value-Added Market Series
(69)   Morgan Stanley Dean Witter Value Fund
(70)   Morgan Stanley Dean Witter Variable Investment Series
(71)   Morgan Stanley Dean Witter World Wide Income Trust

<PAGE>

(b) The following information is given regarding directors and officers of MSDW
Distributors not listed in Item 26 above. The principal address of MSDW
Distributors is Two World Trade Center, New York, New York 10048. Other than
Messrs. Higgins and Purcell, who are Trustees of the Registrant, none of the
following persons has any position or office with the Registrant.

Name                       Positions and Office with MSDW Distributors
----                       -------------------------------------------

James F. Higgins           Director

Philip J. Purcell          Director

John Schaeffer             Director

Charles Vadala             Senior Vice President and Financial Principal.

Item 28. Location of Accounts and Records

         All accounts, books and other documents required to be maintained by
Section 31(a) of the Investment Company Act of 1940 and the Rules thereunder are
maintained by the Investment Manager at its offices, except records relating to
holders of shares issued by the Registrant, which are maintained by the
Registrant's Transfer Agent, at its place of business as shown in the
prospectus.

Item 29. Management Services

         Registrant is not a party to any such management-related service
contract.

Item 30. Undertakings

         Registrant hereby undertakes to furnish each person to whom a
prospectus is delivered with a copy of the Registrant's latest annual report to
shareholders, upon request and without charge.

<PAGE>

                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, the Registrant certifies that it meets all of
the requirements for effectiveness of this Registration Statement pursuant to
Rule 485(b) under the Securities Act of 1933 and has duly caused this
Post-Effective Amendment to the Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of New York
and State of New York on the 24th day of November, 2000.

                   MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST

                                        By /s/ Barry Fink
                                           ----------------------------
                                           Barry Fink
                                           Vice President and Secretary

         Pursuant to the requirements of the Securities Act of 1933, this
Post-Effective Amendment No. 20 has been signed below by the following persons
in the capacities and on the dates indicated.

            Signatures                      Title                       Date

(1) Principal Executive Officer     Chief Executive Officer,
                                    Trustee and Chairman
By /s/ Charles A. Fiumefreddo                                         11/24/00
   ---------------------------
       Charles A. Fiumefreddo

(2) Principal Financial Officer     Treasurer and Principal
                                    Accounting Officer

By /s/ Thomas F. Caloia                                               11/24/00
   ---------------------------
       Thomas F. Caloia

(3) Majority of the Trustees

    Charles A. Fiumefreddo (Chairman)
    Philip J. Purcell
    James F. Higgins

By /s/ Barry Fink                                                     11/24/00
   ---------------------------
       Barry Fink
       Attorney-in-Fact

    Michael Bozic          Manuel H. Johnson
    Edwin J. Garn          Michael E. Nugent
    Wayne E. Hedien        John L. Schroeder


By /s/ David M. Butowsky                                              11/24/00
   ---------------------------
       David M. Butowsky
       Attorney-in-Fact

<PAGE>

          MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST

                                  EXHIBIT INDEX
                                  -------------

8(a).   Amended and Restated Transfer Agency and Services Agreement, dated
        September 1, 2000, between the Registrant and Morgan Stanley Dean Witter
        Trust FSB.

10(a).  Consent of Independent Auditors.

10(b).  Consent of PricewaterhouseCoopers LLP.

15.     Amended and Restated Multiple Class Plan pursuant to Rule 18f-3.

16(a).  Code of Ethics of Morgan Stanley Dean Witter Advisors, Inc., Morgan
        Stanley Dean Witter Services Company Inc., and Morgan Stanley Dean
        Witter Distributors Inc.

16(b).  Code of Ethics of the Morgan Stanley Dean Witter Funds.

Other.  Power of Attorney for James F. Higgins.



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