WITTER DEAN DEVELOPING GROWTH SECURITIES TRUST
497, 1995-11-28
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<PAGE>
                                                Filed Pursuant to Rule 497(e)
                                                Registration File No.: 2-81151


DEAN WITTER
DEVELOPING GROWTH SECURITIES TRUST
PROSPECTUS--NOVEMBER 27, 1995
- ------------------------------------------------------------------------------

DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST (THE "FUND") IS AN OPEN-END
DIVERSIFIED MANAGEMENT INVESTMENT COMPANY WHOSE INVESTMENT OBJECTIVE IS
LONG-TERM CAPITAL GROWTH. WHILE THE FUND MAY INVEST IN ALL TYPES OF EQUITY
AND DEBT SECURITIES, IT INVESTS PRIMARILY IN COMMON STOCKS OF SMALLER AND
MEDIUM-SIZED COMPANIES THAT, IN THE OPINION OF THE INVESTMENT MANAGER, HAVE
THE POTENTIAL FOR GROWING MORE RAPIDLY THAN THE ECONOMY AND WHICH MAY BENEFIT
FROM NEW PRODUCTS OR SERVICES, TECHNOLOGICAL DEVELOPMENTS OR CHANGES IN
MANAGEMENT. (SEE "INVESTMENT OBJECTIVE AND POLICIES.")

        Shares of the Fund are continuously offered at net asset value without
the imposition of a sales charge. However, redemptions and/or repurchases are
subject in most cases to a contingent deferred sales charge, scaled down from
5% to 1% of the amount redeemed, if made within six years of purchase, which
charge will be paid to the Fund's Distributor, Dean Witter Distributors Inc.
(See "Redemptions and Repurchases--Contingent Deferred Sales Charge.") In
addition, the Fund pays the Distributor a Rule 12b-1 distribution fee
pursuant to a Plan of Distribution at the annual rate of 1% of the lesser of
the (i) average daily aggregate net sales or (ii) average daily net assets of
the Fund. (See "Purchase of Fund Shares--Plan of Distribution.")

        This Prospectus sets forth concisely the information you should know
before investing in the Fund. It should be read and retained for future
reference. Additional information about the Fund is contained in the Statement
of Additional Information, dated November 27, 1995, which has been filed with
the Securities and Exchange Commission, and which is available at no charge
upon request of the Fund at the address or telephone numbers listed below.
The Statement of Additional Information is incorporated herein by reference.


TABLE OF CONTENTS

Prospectus Summary ....................................................      3
Summary of Fund Expenses ..............................................      4
Financial Highlights ..................................................      5
The Fund and its Management ...........................................      5
Investment Objective and Policies .....................................      6
  Risk Considerations .................................................      7
Investment Restrictions ...............................................     10
Purchase of Fund Shares ...............................................     11
Shareholder Services ..................................................     13
Redemptions and Repurchases ...........................................     15
Dividends, Distributions and Taxes ....................................     16
Performance Information ...............................................     17
Additional Information ................................................     17

Shares of the Fund are not deposits or obligations of, or guaranteed or
endorsed by, any bank, and the shares are not federally insured by the
Federal Deposit Insurance Corporation, the Federal Reserve Board, or any
other agency.

DEAN WITTER
DEVELOPING GROWTH SECURITIES TRUST
TWO WORLD TRADE CENTER
NEW YORK, NEW YORK 10048
(212) 392-2550 OR (800) 869-NEWS

- -------------------------------------------------------------------------------
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES COMMISSION PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS
A CRIMINAL OFFENSE.

                    Dean Witter Distributors Inc., Distributor




     
<PAGE>

PROSPECTUS SUMMARY
- -----------------------------------------------------------------------------

<TABLE>
<CAPTION>
<S>                   <C>
The                   The Fund is organized as a Trust, commonly known as a Massachusetts business trust, and is an open-end
Fund                  diversified management investment company investing primarily in securities of smaller and medium-sized
                      companies that have the potential to grow much more rapidly than the economy (see page 6).
- --------------------  ---------------------------------------------------------------------------------------------------
Shares Offered        Shares of beneficial interest with $0.01 par value (see page 17).
- --------------------  ---------------------------------------------------------------------------------------------------
Offering              At net asset value without sales charge (see page 11). Shares redeemed within six years of purchase are
Price                 subject to a contingent deferred sales charge under most circumstances (see page 15).
- --------------------  ---------------------------------------------------------------------------------------------------
Minimum               Minimum initial investment, $1,000; minimum subsequent investment, $100
Purchase              (see page 11).
- --------------------  ---------------------------------------------------------------------------------------------------
Investment            The investment objective of the Fund is long-term capital growth.
Objective
- --------------------  ---------------------------------------------------------------------------------------------------
Investment Policies   The Fund invests primarily in common stock of companies believed to have potential for significant growth.
                      However, it may also invest in convertible securities, preferred stock, bonds and warrants of such companies
                      and may engage in certain portfolio techniques, including leveraging (see page 6).
- --------------------  ---------------------------------------------------------------------------------------------------
Investment            Dean Witter InterCapital Inc. ("InterCapital"), the Investment Manager of the Fund, and its wholly-owned
Manager               subsidiary, Dean Witter Services Company Inc., serve in various investment management, advisory, management
                      and administrative capacities to ninety-six investment companies and other portfolios with net assets
                      of approximately $77 billion at October 31, 1995 (see page 6).
- --------------------  ---------------------------------------------------------------------------------------------------
Management            The Investment Manager receives a monthly fee at the annual rate of 0.50% of the Fund's daily net assets
Fee                   on assets not exceeding $500 million and 0.475% of the Fund's daily net assets on assets exceeding $500
                      million (see page 6).
- --------------------  ---------------------------------------------------------------------------------------------------
Dividends and         Dividends from net investment income and distributions from net capital gains, if any, are paid at least
Capital Gains         once per year. Dividends and capital gains distributions are automatically reinvested in additional shares
Distributions         at net asset value unless the shareholder elects to receive cash (see pages 13 and 16).
- --------------------  ---------------------------------------------------------------------------------------------------
Distributor and       Dean Witter Distributors Inc. (the "Distributor"). The Distributor receives from the Fund a distribution
Distribution Fee      fee accrued daily and payable monthly at the rate of 1% per annum of the lesser of (i) the Fund's average
                      daily aggregate net sales or (ii) the Fund's average daily net assets. This fee compensates the Distributor
                      for the services provided in distributing shares of the Fund and for sales-related expenses. The Distributor
                      also receives the proceeds of any contingent deferred sales charges (see pages 11 and 15).
- --------------------  ---------------------------------------------------------------------------------------------------
Redemption--          Shares are redeemable by the shareholder at net asset value. An account may be involuntarily redeemed
Contingent Deferred   if the total value of the account is less than $100. Although no commission or sales load is imposed
Sales                 upon the purchase of shares, a contingent deferred sales charge (scaled down from 5% to 1%) is imposed
Charge                on any redemption of shares if after such redemption the aggregate current value of an account with the
                      Fund falls below the aggregate amount of the investor's purchase payments made during the six years preceding
                      the redemption. However, there is no charge imposed on redemption of shares purchased through reinvestment
                      of dividends or distributions (see pages 15-16).
- --------------------  ---------------------------------------------------------------------------------------------------
Risks                 The net asset value of the Fund's shares will fluctuate with changes in the market value of its portfolio
                      securities. The Fund is intended for long-term investors who can accept the risks involved in seeking
                      long-term growth of capital through investment primarily in the securities of small and medium-sized
                      growth companies. It should be recognized that investing in such companies involves greater risk than
                      is customarily associated with more established companies. In addition, investors should consider the
                      risks which may be involved in certain of the investment policies and techniques which the Fund may employ
                      in its operations, including leveraging and investments in foreign securities (see pages 6-10).
- --------------------  ---------------------------------------------------------------------------------------------------
</TABLE>

The above is qualified in its entirety by the detailed information appearing
elsewhere in this Prospectus and in the Statement of Additional Information.

                                3



     
<PAGE>

SUMMARY OF FUND EXPENSES
- -----------------------------------------------------------------------------

The following table illustrates all expenses and fees that a shareholder of
the Fund will incur. The expenses and fees set forth in the table are for the
fiscal year ended September 30, 1995.

<TABLE>
<CAPTION>
<S>                                                                                      <C>
SHAREHOLDER TRANSACTION EXPENSES
Maximum Sales Charge Imposed on Purchases ............................................    None
Maximum Sales Charge Imposed on Reinvested Dividends .................................    None
Deferred Sales Charge
  (as a percentage of the lesser of original purchase price or redemption proceeds) ..    5.0%
</TABLE>

        A contingent deferred sales charge is imposed at the following
        declining rates:

<TABLE>
<CAPTION>
 YEAR SINCE PURCHASE PAYMENT MADE       PERCENTAGE
- ------------------------------------  --------------
<S>                                     <C>
First ...............................    5.0%
Second ..............................    4.0%
Third ...............................    3.0%
Fourth ..............................    2.0%
Fifth ...............................    2.0%
Sixth ...............................    1.0%
Seventh and thereafter ..............    None

<CAPTION>
<S>                                                                                      <C>
Redemption Fees  .....................................................................    None
Exchange Fee .........................................................................    None

<CAPTION>
<S>                                                                                      <C>
ANNUAL FUND OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS)
Management Fees ......................................................................    0.50%
12b-1 Fees* ..........................................................................    1.00%
Other Expenses .......................................................................    0.27%
Total Fund Operating Expenses ........................................................    1.77%
<FN>
- ------------
   *    A portion of the 12b-1 fee equal to 0.25% of the Fund's average daily
        net assets is characterized as a service fee within the meaning of
        National Association of Securities Dealers, Inc. ("NASD") guidelines
        (see "Purchase of Fund Shares").

<CAPTION>
 EXAMPLE                                                        1 YEAR    3 YEARS    5 YEARS    10 YEARS
- -------------------------------------------------------------  --------  ---------  ---------  ----------
<S>                                                              <C>       <C>        <C>        <C>
You would pay the following expenses on a $1,000 investment,
 assuming (1) 5% annual return and (2) redemption at the end
 of each time period: ........................................    $68       $86        $116       $208
You would pay the following expenses on the same investment,
 assuming no redemption: .....................................    $18       $56        $ 96       $208
</TABLE>

   THE ABOVE EXAMPLE SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR
FUTURE EXPENSES OR PERFORMANCE. ACTUAL EXPENSES OF THE FUND MAY BE GREATER OR
LESS THAN THOSE SHOWN.

   The purpose of this table is to assist the investor in understanding the
various costs and expenses that an investor in the Fund will bear directly or
indirectly. For a more complete description of these costs and expenses, see
"The Fund and its Management," "Plan of Distribution" and "Redemptions and
Repurchases."

   Long-term shareholders of the Fund may pay more in sales charges and
distribution fees than the economic equivalent of the maximum front-end sales
charges permitted by the NASD.

                                4



     
<PAGE>

FINANCIAL HIGHLIGHTS
- -----------------------------------------------------------------------------

The following ratios and per share data for a share of beneficial interest
outstanding throughout each period have been audited by Price Waterhouse LLP,
independent accountants. The financial highlights should be read in
conjunction with the financial statements, notes thereto and the unqualified
report of independent accountants, which are contained in the Statement of
Additional Information. Further information about the performance of the Fund
is contained in the Fund's Annual Report to Shareholders, which may be
obtained without charge upon request to the Fund.

<TABLE>
<CAPTION>
                                                      FOR THE YEAR ENDED SEPTEMBER 30,
                               ----------------------------------------------------------------------------
                                   1995         1994         1993         1992         1991         1990
                               -----------  -----------  -----------  -----------  -----------  -----------
<S>                            <C>          <C>          <C>          <C>          <C>          <C>
PER SHARE OPERATING
 PERFORMANCE:
Net asset value, beginning of
 period ...................... $17.55       $20.50       $12.20       $ 14.05      $ 8.92       $ 11.33
                               -----------  -----------  -----------  -----------  -----------  -----------
Net investment income (loss)    (0.19)        --          (0.12)        (0.12)      (0.07)        (0.15)
Net realized andunrealized
 gain (loss) .................   8.34        (1.82)        8.42         (1.73)       5.20         (2.21)
                               -----------  -----------  -----------  -----------  -----------  -----------
Total from investment
 operations ..................   8.15        (1.82)        8.30         (1.85)       5.13         (2.36)
                               -----------  -----------  -----------  -----------  -----------  -----------
Less dividends and
 distributions from:
 Net investment income .......   --           --           --            --          --           (0.05)
 Net realized gain ...........  (0.16)       (1.13)        --            --          --            --
                               -----------  -----------  -----------  -----------  -----------  -----------
Total dividends and
 distributions ...............  (0.16)       (1.13)        --            --          --           (0.05)
                               -----------  -----------  -----------  -----------  -----------  -----------
Net asset value, end of
 period ...................... $25.54       $17.55       $20.50       $ 12.20      $14.05       $  8.92
                               ===========  ===========  ===========  ===========  ===========  ===========
TOTAL INVESTMENT RETURN+  ....  46.87%       (8.88)%      67.95%       (13.17)%     57.51%       (20.87)%
Ratios to Average Net Assets:
Expenses .....................   1.77%        1.78%        1.84%         1.86%       1.92%         2.02%
Net investment income (loss)    (1.04)%      (1.32)%      (1.52)%       (1.14)%     (0.73)%       (1.32)%
SUPPLEMENTAL DATA:
Net assets, end of period,
 in thousands ................  $534,869     $340,169     $240,389     $112,982     $115,337      $67,604
Portfolio turnover rate  .....    114%         160%         203%          153%         88%           53%
</TABLE>




     



                    (RESTUBBED TABLE CONTINUED FROM ABOVE)

<TABLE>
<CAPTION>
                                   1989          1988         1987         1986
                               -----------  ------------  -----------  -----------
<S>                            <C>          <C>           <C>          <C>
PER SHARE OPERATING
 PERFORMANCE:
Net asset value, beginning of
 period ...................... $  9.67      $  10.96      $   8.57     $   7.68
                               -----------  ------------  -----------  -----------
Net investment income (loss)      0.04         (0.03)        (0.02)        0.01
Net realized andunrealized
 gain (loss) .................    1.62         (1.26)         2.42         0.92
                               -----------  ------------  -----------  -----------
Total from investment
 operations ..................    1.66         (1.29)         2.40         0.93
                               -----------  ------------  -----------  -----------
Less dividends and
 distributions from:
 Net investment income .......    --           --            (0.01)       (0.04)
 Net realized gain ...........    --           --            --           --
                               -----------  ------------  -----------  -----------
Total dividends and
 distributions ...............    --           --            (0.01)       (0.04)
                               -----------  ------------  -----------  -----------
Net asset value, end of
 period ...................... $ 11.33      $   9.67      $  10.96     $   8.57
                               ===========  ============  ===========  ===========
TOTAL INVESTMENT RETURN+  ....   17.17%       (11.77)%       28.07%       12.22%
Ratios to Average Net Assets:
Expenses .....................    1.89%         1.90%         1.83%        1.80%
Net investment income (loss)      0.59%        (0.28)%       (0.20)%       0.08%
SUPPLEMENTAL DATA:
Net assets, end of period,
 in thousands ................   $89,236      $108,411      $179,276     $139,662
Portfolio turnover rate  .....      84%           70%           68%          90%
<FN>
- ------------
+ Does not reflect the deduction of sales charge.
</TABLE>

                                5



     
<PAGE>

THE FUND AND ITS MANAGEMENT
- -----------------------------------------------------------------------------
Dean Witter Developing Growth Securities Trust (the "Fund") is an open-end
diversified management investment company. The Fund is a trust of the type
commonly known as a "Massachusetts business trust" and was organized under
the laws of Massachusetts on December 28, 1982.

   Dean Witter InterCapital Inc. ("InterCapital" or the "Investment
Manager"), whose address is Two World Trade Center, New York, New York 10048,
is the Fund's Investment Manager. The Investment Manager, which was
incorporated in July, 1992, is a wholly-owned subsidiary of Dean Witter,
Discover & Co. ("DWDC"), a balanced financial services organization providing
a broad range of nationally marketed credit and investment products.

   InterCapital and its wholly-owned subsidiary, Dean Witter Services Company
Inc., serve in various investment management, advisory, management and
administrative capacities to ninety-six investment companies, thirty of which
are listed on the New York Stock Exchange, with combined total assets of
approximately $74.6 billion as of October 31, 1995. The Investment Manager
also manages portfolios of pension plans, other institutions and individuals
which aggregated approximately $2.4 billion at such date.

   The Fund has retained the Investment Manager to provide administrative
services, manage its business affairs and manage the investment of the Fund's
assets including the placing of orders for the purchase and sale of portfolio
securities. InterCapital has retained Dean Witter Services Company Inc. to
perform the aforementioned administrative services for the Fund.

   The Fund's Board of Trustees reviews the various services provided by or
under the direction of the Investment Manager to ensure that the Fund's
general investment policies and programs are being properly carried out and
that administrative services are being provided to the Fund in a satisfactory
manner.

   As full compensation for the services and facilities furnished to the Fund
and for expenses of the Fund assumed by the Investment Manager, the Fund pays
the Investment Manager monthly compensation calculated daily by applying the
annual rate of 0.50% to the Fund's net assets not exceeding $500 million and
0.475% to the Fund's net assets exceeding $500 million. For the fiscal year
ended September 30, 1995, the Fund accrued total compensation to the
Investment Manager amounting to 0.50% of the Fund's average daily net assets
and the Fund's total expenses amounted to 1.77% of the Fund's average daily
net assets.

INVESTMENT OBJECTIVE AND POLICIES
- -----------------------------------------------------------------------------
The investment objective of the Fund is long-term capital growth. There is
no assurance that the objective will be achieved. This objective is
fundamental and may not be changed without shareholder approval. The
following policies may be changed by the Board of Trustees without
shareholder approval.

   The Fund seeks to achieve capital growth which significantly exceeds the
historical total return of common stocks as measured by the Standard & Poor's
500 index. The primary emphasis is on the securities of smaller and
medium-sized companies that, in the opinion of the Investment Manager, have
the potential to grow much more rapidly than the economy; at times,
investments may also be made in the securities of larger, established
companies which also have such growth potential. The Fund will normally
invest at least 65% of its total assets in the securities of such companies.
In addition to common stock, this portion of the portfolio may also include
convertible securities, preferred stocks and warrants.

   The Investment Manager attempts to identify companies whose earnings
growth will be significantly higher than the average. Dividend income is not
generally a consideration in the selection of stocks for purchase.

   The Investment Manager focuses its stock selection for the Fund upon a
diversified group of emerging growth companies which have moved beyond the
difficult and extremely risky "start-up" phase and which at the time of
selection show positive earnings with the prospects of achieving significant
further profit gains in at least the next two-to-three years after
acquisition. New technologies, techniques, products or services,
cost-reducing measures, changes in management, capitalization or asset
deployment, changes in government regulations or favorable shifts in other
external circumstances may all contribute to the anticipated phase of growth.

   The application of the Fund's investment policies is basically dependent
upon the judgment of the Investment

                                6



     
<PAGE>

Manager. The proportions of the Fund's assets invested in particular
industries will shift from time to time in accordance with the judgment of
the Investment Manager.

   The Fund may invest up to 35% of its total assets in corporate debt
securities which are rated at the time of purchase Baa or better by Moody's
Investors Service Inc. or BBB or better by Standard & Poor's Corporation or
which, if not rated, are deemed to be of comparable quality by the Investment
Manager, and money market instruments. There may be periods during which, in
the opinion of the Investment Manager, general market conditions warrant
reduction of some or all of the Fund's securities holdings. During such
periods, the Fund may adopt a temporary "defensive" posture in which greater
than 35% of its total assets are invested in cash or money market
instruments, including obligations issued or guaranteed as to principal or
interest by the United States Government, its agencies or instrumentalities,
certificates of deposit, bankers' acceptances and other obligations of
domestic banks having total assets of $1 billion or more, and short-term
commercial paper of corporations organized under the laws of any state or
political subdivision of the United States.

   The securities in which the Fund invests may or may not be listed on a
national stock exchange, but if they are not so listed, will generally have
an established over-the-counter market.

   The Fund may invest in foreign securities, real estate investment trusts
and private placements, enter into repurchase agreements, borrow money for
the purpose of leveraging its investments, purchase securities on a
when-issued or delayed delivery basis, purchase or sell securities on a
forward commitment basis, purchase securities on a "when, as and if issued"
basis, and lend its portfolio securities, as discussed under "Risk
Considerations" below.

RISK CONSIDERATIONS

The net asset value of the Fund's shares will fluctuate with changes in the
market value of its portfolio securities. The market value of the Fund's
portfolio securities will increase or decrease due to a variety of economic,
market or political factors which cannot be predicted. The Fund is intended
for long-term investors who can accept the risks involved in seeking
long-term growth of capital through investment primarily in the securities of
small and medium-sized growth companies. It should be recognized that
investing in such companies involves greater risk than is customarily
associated with investing in more established companies.

FOREIGN SECURITIES. The Fund may invest in securities of foreign companies.
However, the Fund will not invest more than 10% of the value of its total
assets, at the time of purchase, in foreign securities (other than securities
of Canadian issuers registered under the Securities Exchange Act of 1934 or
American Depository Receipts, on which there is no such limit). Foreign
securities investments may be affected by changes in currency rates or
exchange control regulations, changes in governmental administration or
economic or monetary policy (in the United States and abroad) or changed
circumstances in dealings between nations. Fluctuations in the relative rates
of exchange between the currencies of different nations will affect the value
of the Fund's investments denominated in foreign currency. Changes in foreign
currency exchange rates relative to the U.S. dollar will affect the U.S.
dollar value of the Fund's assets denominated in that currency and thereby
impact upon the Fund's total return on such assets.

   Foreign currency exchange rates are determined by forces of supply and
demand on the foreign exchange markets. These forces are themselves affected
by the international balance of payments and other economic and financial
conditions, government intervention, speculation and other factors. Moreover,
foreign currency exchange rates may be affected by the regulatory control of
the exchanges on which the currencies trade. The Fund will incur costs in
connection with conversions between various currencies.

   Investments in foreign securities will also occasion risks relating to
political and economic developments abroad, including the possibility of
expropriations or confiscatory taxation, limitations on the use or transfer
of Fund assets and any effects of foreign social, economic or political
instability. Foreign companies are not subject to the regulatory requirements
of U.S. companies and, as such, there may be less publicly available
information about such companies. Moreover, foreign companies are not subject
to uniform accounting, auditing and financial reporting standards and
requirements comparable to those applicable to U.S. companies. 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
such 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
American counterparts. Brokerage

                                7



     
<PAGE>

commissions, dealer concessions and other transaction costs may be higher on
foreign markets than in the U.S. In addition, differences in clearance and
settlement procedures on foreign markets may occasion delays in settlements
of the Fund's trades effected in such markets. As such, the inability to
dispose of portfolio securities due to settlement delays could result in
losses to the Fund due to subsequent declines in value of such securities and
the inability of the Fund to make intended security purchases due to
settlement problems could result in a failure of the Fund to make potentially
advantageous investments. Investments in certain Canadian issuers may be
speculative due to certain political risks and may be subject to substantial
price fluctuations.

REPURCHASE AGREEMENTS. The Fund may enter into repurchase agreements, which
may be viewed as a type of secured lending by the Fund, and which typically
involve the acquisition by the Fund of debt securities from a selling
financial institution such as a bank, savings and loan association or
broker-dealer. The agreement provides that the Fund will sell back to the
institution, and that the institution will repurchase, the underlying
security at a specified price and at a fixed time in the future, usually not
more than seven days from the date of purchase. While repurchase agreements
involve certain risks not associated with direct investments in debt
securities, the Fund follows procedures designed to minimize those risks.
These procedures include effecting repurchase transactions only with large,
well-capitalized and well-established financial institutions whose financial
condition will be continually monitored by the Investment Manager subject to
procedures established by the Board of Trustees of the Fund. In addition, 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. The Fund may not invest in
repurchase agreements that do not mature within seven days if any such
investment, together with any other illiquid assets held by the Fund, amounts
to more than 15% of its net assets.

PRIVATE PLACEMENTS. The Fund may invest up to 5% of its total assets in
securities which are subject to restrictions on resale because they have not
been registered under the Securities Act of 1933, as amended (the "Securities
Act"), or which are otherwise not readily marketable. (Securities eligible
for resale pursuant to Rule 144A under the Securities Act, and determined to
be liquid pursuant to the procedures discussed below, are not subject to the
foregoing restriction.) These securities are generally referred to as private
placements or restricted securities. The Securities and Exchange Commission
has adopted Rule 144A under the Securities Act, which permits the Fund to
sell restricted securities to qualified institutional buyers without
limitation. The Investment Manager, pursuant to procedures adopted by the
Trustees of the Fund, will make a determination as to the liquidity of each
restricted security purchased by the Fund. If a restricted security is
determined to be "liquid", such security will not be included within the
category "illiquid securities", which under current policy may not exceed 15%
of the Fund's net assets. Limitations on the resale of private placements may
have an adverse effect on their marketability, and may prevent the Fund from
disposing of them promptly at reasonable prices. The Fund may have to bear
the expense of registering such securities for resale and the risk of
substantial delays in effecting such registration. In the case of restricted
securities determined to be "liquid" pursuant to Rule 144A under the
Securities Act, the Fund's illiquidity could increase if qualified
institutional buyers become unavailable.

CONVERTIBLE SECURITIES. A convertible security is a bond, debenture, note,
preferred stock or other security that may be converted into or exchanged for
a prescribed amount of common stock of the same or a different issuer within
a particular period of time at a specified price or formula. Convertible
securities rank senior to common stocks in a corporation's capital structure
and, therefore, entail less risk than the corporation's common stock. The
value of a convertible security is a function of its "investment value" (its
value as if it did not have a conversion privilege), and its "conversion
value" (the security's worth if it were to be exchanged for the underlying
security, at market value, pursuant to its conversion privilege). To the
extent that a convertible security's investment value is greater than its
conversion value, its price will be primarily a reflection of such investment
value and its price will be likely to increase when interest rates fall and
decrease when interest rates rise, as with a fixed-income security (the
credit standing of the issuer and other factors may also have an effect on
the convertible security's value). If the conversion value exceeds the
investment value, the price of the convertible security will rise above its
investment value and, in addition, the convertible security will sell at some
premium over its conversion value. (This premium

                                8



     
<PAGE>

represents the price investors are willing to pay for the privilege of
purchasing a fixed-income security with a possibility of capital appreciation
due to the conversion privilege.) At such times the price of the convertible
security will tend to fluctuate directly with the price of the underlying
equity security.

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.

LEVERAGING. The Fund may borrow money, but only from a bank and in an amount
up to 25% of the value 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). When the Fund borrows it will be because it
seeks to enhance capital appreciation by leveraging its investments through
purchasing securities with the borrowed funds. The Fund will be required to
maintain an asset coverage (including the proceeds of borrowings) of at least
300% of such borrowings in accordance with the provisions of the Investment
Company Act of 1940 (the "Act"). The investment policy also provides that the
Fund may not purchase or sell a security on margin.

   Borrowings for leveraging will be subject to current margin requirements
of the Federal Reserve Board and where necessary the Fund may use any or all
of its securities as collateral for such borrowings. Any investment gains
made with the additional monies in excess of interest paid will cause the net
asset value of the Fund's shares to rise to a greater extent than would
otherwise be the case. Conversely, if the investment performance of the
additional monies fails to cover their cost to the Fund, net asset value will
decrease to a greater extent than would otherwise be the case. This is the
speculative factor involved in leverage. If, due to market fluctuations or
other reasons, the value of the Fund's assets (including the proceeds of
borrowings) becomes at any time less than three times the amount of any
outstanding bank debt, the Fund, within three business days, will reduce its
bank debt to the extent necessary to meet the required 300% asset coverage.
In doing this, the Fund may have to sell a portion of its investments at a
time when it may be disadvantageous to do so.

WHEN-ISSUED AND DELAYED DELIVERY SECURITIES AND FORWARD COMMITMENTS. From
time to time, in the ordinary course of business, the Fund may purchase
securities on a when-issued or delayed delivery basis or may purchase or sell
securities on a forward commitment basis. When such transactions are
negotiated, the price is fixed at the time of the commitment, but delivery
and payment can take place a month or more after the date of the commitment.
There is no overall limit on the percentage of the Fund's assets which may be
committed to the purchase of securities on a when-issued, delayed delivery or
forward commitment basis. An increase in the percentage of the Fund's assets
committed to the purchase of securities on a when-issued, delayed delivery or
forward commitment basis may increase the volatility of the Fund's net asset
value.

WHEN, AS AND IF ISSUED SECURITIES. The Fund may purchase securities on a
"when, as and if issued" basis under which the issuance of the security
depends upon the occurrence of a subsequent event, such as approval of a
merger, corporate reorganization, leveraged buyout or debt restructuring. If
the anticipated event does not occur and the securities are not issued, the
Fund will have lost an investment opportunity. There is no overall limit on
the percentage of the Fund's assets which may be committed to the purchase of
securities on a "when, as and if issued" basis. An increase in the percentage
of the Fund's assets committed to the purchase of securities on a "when, as
and if issued" basis may increase the volatility of the Fund's net asset
value.

LENDING OF PORTFOLIO SECURITIES. Consistent with applicable regulatory
requirements, the Fund may lend its portfolio securities to brokers, dealers
and other financial institutions, provided that such loans are callable at
any time by the Fund (subject to certain notice provisions described in the
Statement of Additional Information), and are at all times secured by cash or
money market instruments, which are maintained in a segregated account
pursuant to applicable regulations and that are equal to at least the market
value, determined daily, of the loaned securities. 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, loans of portfolio

                                9



     
<PAGE>

securities will only be made to firms deemed by the Investment Manager to be
creditworthy and when the income which can be earned from such loans
justifies the attendant risks.

   For additional risk disclosure, please refer to the "Investment Objective
and Policies" section of the Prospectus and to the "Investment Practices and
Policies" section of the Statement of Additional Information.

PORTFOLIO MANAGEMENT

The Fund's portfolio is actively managed by its Investment Manager with a
view to achieving the Fund's investment objective. No particular emphasis is
given to investments in securities for the purpose of earning current income.
In determining which securities to purchase for the Fund or hold in the
Fund's portfolio, the Investment Manager will rely on information from
various sources, including research, analysis and appraisals of brokers and
dealers, including Dean Witter Reynolds Inc. ("DWR"), a broker-dealer
affiliate of InterCapital, the views of Trustees of the Fund and others
regarding economic developments and interest rate trends, and the Investment
Manager's own analysis of factors it deems relevant. The Fund is managed
within InterCapital's Growth Group, which manages twenty-seven funds and fund
portfolios, with approximately $8.4 billion in assets at October 31, 1995.
Jayne Stevlingson, Vice President of InterCapital and a member of
InterCapital's Growth Group, is the primary portfolio manager of the Fund.
Ms. Stevlingson has been a portfolio manager of the Fund since September,
1994 and has been the sole portfolio manager of the Fund since November,
1995. She has been a portfolio manager with InterCapital since October, 1992,
prior to which time she was an analyst with Bankers Trust New York Corp.

   Orders for transactions in portfolio securities are placed for the Fund
with a number of brokers, including DWR. Pursuant to an order of the
Securities and Exchange Commission, the Fund may effect principal
transactions in certain money market instruments with DWR. In addition, the
Fund may incur brokerage commissions on transactions conducted through DWR.

   The portfolio trading engaged in by the Fund may result in its portfolio
turnover rate exceeding 200%, although it is not anticipated that this rate
will exceed 300%. The Fund will incur brokerage costs commensurate with its
portfolio turnover rate, and thus a higher level (over 100%) of portfolio
transactions will increase the Fund's overall brokerage expenses. See
"Dividends, Distributions and Taxes" for a discussion of the tax implications
of the Fund's trading policy. A more extensive discussion of the Fund's
portfolio brokerage policies is set forth in the Statement of Additional
Information.

INVESTMENT RESTRICTIONS
- -----------------------------------------------------------------------------
The investment restrictions listed below have been adopted by the Fund as
fundamental policies, along with certain other investment restrictions. Under
the Act, a fundamental policy may not be changed without the vote of a
majority of the outstanding voting securities of the Fund, as defined in the
Act.

   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 bythe 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, within the limits
set forth in the Act (see "Leveraging," above).

   If a percentage restriction is adhered to at the time of investment, a
later increase or decrease in percentage resulting from a change in values of
portfolio securities or amount of total or net assets will not be considered
a violation of any of the foregoing restrictions.

                               10



     
<PAGE>

PURCHASE OF FUND SHARES
- -----------------------------------------------------------------------------
The Fund offers its shares for sale to the public on a continuous basis.
Pursuant to a Distribution Agreement between the Fund and Dean Witter
Distributors Inc. (the "Distributor"), an affiliate of the Investment
Manager, shares of the Fund are distributed by the Distributor and offered by
DWR and other dealers who have entered into selected dealer agreements with
the Distributor ("Selected Broker-Dealers"). The principal executive office
of the Distributor is located at Two World Trade Center, New York, New York
10048.

   The minimum initial purchase is $1,000. Subsequent purchases of $100 or
more may be made by sending a check, payable to Dean Witter Developing Growth
Securities Trust, directly to Dean Witter Trust Company (the "Transfer
Agent") at P.O. Box 1040, Jersey City, NJ 07303 or by contacting an account
executive of DWR or other Selected Broker-Dealer. In the case of investments
pursuant to Systematic Payroll Deduction Plans (including Individual
Retirement Plans), the Fund, in its discretion, may accept investments
without regard to any minimum amounts which would otherwise be required, if
the Fund has reason to believe that additional investments will increase the
investment in all accounts under such Plans to at least $1,000. Certificates
for shares purchased will not be issued unless requested by the shareholder
in writing to the Transfer Agent. The offering price will be the net asset
value per share next determined following receipt of an order (see
"Determination of Net Asset Value" below).

   Shares of the Fund are sold through the Distributor on a normal three
business day settlement basis; that is, payment is due on the third business
day (settlement date) after the order is placed with the Distributor. Since
DWR and other Selected Broker-Dealers forward investors' funds on settlement
date, they will benefit from the temporary use of the funds if payment is
made prior thereto. As noted above, orders placed directly with the Transfer
Agent must be accompanied by payment. Investors will be entitled to receive
income dividends and capital gains distributions if their order is received
by the close of business on the day prior to the record date for such
dividends and distributions. While no sales charge is imposed at the time
shares are purchased, a contingent deferred sales charge may be imposed at
the time of redemption (see "Redemptions and Repurchases"). Sales personnel
are compensated for selling shares of the Fund at the time of their sale by
the Distributor and/or Selected Broker-Dealer. In addition, some sales
personnel of the Selected Broker-Dealer will receive various types of
non-cash compensation as special sales incentives, including trips,
educational and/or business seminars and merchandise. The Fund and the
Distributor reserve the right to reject any purchase orders.

PLAN OF DISTRIBUTION

The Fund has adopted a Plan of Distribution pursuant to Rule 12b-1 of the Act
(the "Plan"), under which the Fund pays the Distributor a fee, which is
accrued daily and payable monthly, at an annual rate of 1.0% of the lesser
of: (a) the average daily aggregate gross sales of the Fund's 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 shares redeemed since the Fund's inception upon which a
contingent deferred sales charge has been imposed or waived, or (b) the
Fund's average daily net assets. This fee is treated by the Fund as an
expense in the year it is accrued. A portion of the fee payable pursuant to
the Plan, equal to 0.25% of the Fund's average daily net assets, is
characterized as a service fee within the meaning of NASD guidelines. The
service fee is a payment made for personal service and/or the maintenance of
shareholder accounts.

   Amounts paid under the Plan are paid to the Distributor to compensate it
for the services provided and the expenses borne by the Distributor and
others in the distribution of the Fund's shares, including the payment of
commissions for sales of the Fund's shares and incentive compensation to and
expenses of DWR account executives and others who engage in or support
distribution of shares or who service shareholder accounts, including
overhead and telephone expenses; printing and distribution of prospectuses
and reports used in connection with the offering of the Fund's shares to
other than current shareholders; and preparation, printing and distribution
of sales literature and advertising materials. In addition, the Distributor
may utilize fees paid pursuant to the Plan to compensate DWR and other
Selected Broker-Dealers for their opportunity costs in advancing such
amounts, which compensation would be in the form of a carrying charge on any
unreimbursed distribution expenses.

   For the fiscal year ended September 30, 1995, the Fund accrued payments
under the Plan amounting to $3,834,696, which amount is equal to 1.0% of the
Fund's

                               11



     
<PAGE>

average daily net assets for the fiscal year. The payments accrued under the
Plan were calculated pursuant to clause (b) of the compensation formula under
the Plan.

   At any given time, the expenses of distributing shares of the Fund may be
in excess of the total of (i) the payments made by the Fund pursuant to the
Plan and (ii) the proceeds of contingent deferred sales charges paid by
investors upon redemption of shares (see "Redemptions and
Repurchases--Contingent Deferred Sales Charge"). For example, if $1 million
in expenses in distributing shares of the Fund had been incurred and $750,000
had been received as described in (i) and (ii) above, the excess expense
would amount to $250,000. The Distributor has advised the Fund that such
excess amounts, including the carrying charge described above, totalled
$22,445,057 at September 30, 1995, which was equal to 4.2% of the Fund's net
assets on such date. Because there is no requirement under the Plan that the
Distributor be reimbursed for all distribution expenses or any requirement
that the Plan be continued from year to year, 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 contingent deferred sales
charges paid by investors upon redemption of shares, if for any reason the
Plan is terminated the Trustees will consider at that time the manner in
which to treat such expenses. Any cumulative expenses incurred, but not yet
recovered through distribution fees or contingent deferred sales charges, may
or may not be recovered through future distribution fees or contingent
deferred sales charges.

DETERMINATION OF NET ASSET VALUE

The net asset value per share of the Fund is determined once daily at 4:00
p.m., New York time (or, on days when the New York Stock Exchange closes
prior to 4:00 p.m., at such earlier time), on each day that the New York
Stock Exchange is open by taking the value of all assets of the Fund,
subtracting all its liabilities, dividing by the number of shares outstanding
and adjusting to the nearest cent. The net asset value per share will not be
determined on Good Friday and on such other federal and non-federal holidays
as are observed by the New York Stock Exchange.

   In the calculation of the Fund's net asset value: (1) an equity portfolio
security listed or traded on the New York or American Stock Exchange or
quoted by NASDAQ is valued at its latest sale price on that exchange or
quotation service prior to the time assets are valued; if there were no sales
that day, the security is valued at the latest bid price (in cases where a
security is traded on more than one exchange, the security is valued on the
exchange designated as the primary market pursuant to procedures adopted by
the Trustees), and (2) all other portfolio securities for which
over-the-counter market quotations are readily available are valued at the
latest bid price. When market quotations are not readily available, including
circumstances under which it is determined by the Investment Manager that
sale and bid prices are not reflective of a security's market value,
portfolio securities are valued at their fair value as determined in good
faith under procedures established by and under the general supervision of
the Board of Trustees (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).

   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' fair 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 utilizes
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 fairvaluation of the portfolio securities valued by
such pricing service.

                               12



     
<PAGE>

SHAREHOLDER SERVICES
- -----------------------------------------------------------------------------
AUTOMATIC INVESTMENT OF DIVIDENDS AND DISTRIBUTIONS. All income dividends
and capital gains distributions are automatically paid in full and fractional
shares of the Fund (or, if specified by the shareholder, any other open-end
investment company for which InterCapital serves as investment manager
(collectively, with the Fund, the "Dean Witter Funds")), unless the
shareholder requests that they be paid in cash. Shares so acquired are not
subject to the imposition of a contingent deferred sales charge upon their
redemption (see "Redemptions and Repurchases").

INVESTMENT OF DIVIDENDS AND DISTRIBUTIONS RECEIVED IN CASH. Any shareholder
who receives a cash payment representing a dividend or capital gains
distribution may invest such dividend or distribution at the net asset value
per share next determined after receipt by the Transfer Agent, by returning
the check or the proceeds to the Transfer Agent within thirty days after the
payment date. Shares so acquired are not subject to the imposition of a
contingent deferred sales charge upon their redemption (see "Redemptions and
Repurchases.")

EASYINVEST (SERVICE MARK) . Shareholders may subscribe to EasyInvest, an
automatic purchase plan which provides for any amount from $100 to $5,000 to
be transferred automatically from a checking or savings account, on a
semi-monthly, monthly or quarterly basis, to the Transfer Agent for
investment in shares of the Fund.

SYSTEMATIC WITHDRAWAL PLAN. A systematic withdrawal plan (the "Withdrawal
Plan") is available for shareholders who own or purchase shares of the Fund
having a minimum value of $10,000 based upon the then current net asset
value. The Withdrawal Plan provides for monthly or quarterly (March, June,
September and December) checks in any dollar amount, not less than $25, or in
any whole percentage of the account balance, on an annualized basis. Any
applicable contingent deferred sales charge will be imposed on shares
redeemed under the Withdrawal Plan (see "Redemptions and Repurchases
- --Contingent Deferred Sales Charge"). Therefore, any shareholder
participating in the Withdrawal Plan will have sufficient shares redeemed
from his or her account so that the proceeds (net of any applicable
contingent deferred sales charge) to the shareholder will be the designated
monthly or quarterly amount.

   Shareholders should contact their DWR or other Selected Broker-Dealer
account executive or the Transfer Agent for further information about any of
the above services.

TAX SHELTERED RETIREMENT PLANS. Retirement plans are available for use by
corporations, the self- employed, Individual Retirement Accounts and
Custodial Accounts under Section 403(b)(7) of the Internal Revenue Code.
Adoption of such plans should be on advice of legal counsel or tax adviser.

   For further information regarding plan adminis- tration, custodial fees
and other details, investors should contact their account executive or the
Transfer Agent.

EXCHANGE PRIVILEGE. The Fund makes available to its shareholders an "Exchange
Privilege" allowing the exchange of shares of the Fund for shares of other
Dean Witter Funds sold with a contingent deferred sales charge ("CDSC
funds"), and for shares of Dean Witter Short-Term U.S. Treasury Trust, Dean
Witter Limited Term Municipal Trust, Dean Witter Short-Term Bond Fund, Dean
Witter Balanced Growth Fund, Dean Witter Balanced Income Fund, Dean Witter
Intermediate Term U.S. Treasury Trust and five Dean Witter Funds which are
money market funds (the foregoing eleven non-CDSC funds are hereinafter
referred to as the "Exchange Funds"). Exchanges may be made after the shares
of the Fund acquired by purchase (not by exchange or dividend reinvestment)
have been held for thirty days. There is no waiting period for exchanges of
shares acquired by exchange or dividend reinvestment.

   An exchange to another CDSC fund or any Exchange Fund that is not a money
market fund is on the basis of the next calculated net asset value per share
of each fund after the exchange order is received. When exchanging into a
money market fund from the Fund, shares of the Fund are redeemed out of the
Fund at their next calculated net asset value and the proceeds of the
redemption are used to purchase shares of the money market fund at their net
asset value determined the following business day. Subsequent exchanges
between any of the money market funds and any of the CDSC funds can be
effected on the same basis. No contingent deferred sales charge ("CDSC") is
imposed at the time of any exchange, although any applicable CDSC will be
imposed upon ultimate redemption. Shares of the Fund acquired in exchange for
shares of another CDSC fund having a different CDSC schedule than that of
this Fund will be subject to the CDSC schedule of this Fund, even if such
shares are subsequently re-exchanged for shares of the CDSC fund originally
purchased. During the period of time the shareholder remains in the Exchange
Fund (calculated from the last day of the month in which

                               13



     
<PAGE>

the Exchange Fund shares were acquired), the holding period (for the purpose
of determining the rate of the CDSC) is frozen. If those shares are
subsequently reexchanged for shares of a CDSC fund, the holding period
previously frozen when the first exchange was made resumes on the last day of
the month in which shares of a CDSC fund are reacquired. Thus, the CDSC is
based upon the time (calculated as described above) the shareholder was
invested in a CDSC fund (see "Redemptions and Repurchases--Contingent
Deferred Sales Charge"). However, in the case of shares exchanged into an
Exchange Fund on or after April 23, 1990, upon a redemption of shares which
results in a CDSC being imposed, a credit (not to exceed the amount of the
CDSC) will be given in an amount equal to the Exchange Fund 12b-1
distribution fees incurred on or after that date which are attributable to
those shares. (Exchange Fund 12b-1 distribution fees are described in the
prospectuses for those funds.)

   In addition, shares of the Fund may be acquired in exchange for shares of
Dean Witter Funds sold with a front-end sales charge ("front-end sales charge
funds"), but shares of the Fund, however acquired, may not be exchanged for
shares of front-end sales charge funds. Shares of a CDSC fund acquired in
exchange for shares of a front-end sales charge fund (or in exchange for
shares of other Dean Witter Funds for which shares of a front-end sales
charge fund have been exchanged) are not subject to any CDSC upon their
redemption.

   Purchases and exchanges should be made for investment purposes only. A
pattern of frequent exchanges may be deemed by the Investment Manager to be
abusive and contrary to the best interests of the Fund's other shareholders
and, at the Investment Manager's discretion, may be limited by the Fund's
refusal to accept additional purchases and/or exchanges from the investor.
Although the Fund does not have any specific definition of what constitutes a
pattern of frequent exchanges, and will consider all relevant factors in
determining whether a particular situation is abusive and contrary to the
best interests of the Fund and its other shareholders, investors should be
aware that the Fund and each of the other Dean Witter Funds may in their
discretion limit or otherwise restrict the number of times this Exchange
Privilege may be exercised by any investor. Any such restriction will be made
by the Fund on a prospective basis only, upon notice to the shareholder not
later than ten days following such shareholder's most recent exchange. Also
the Exchange Privilege may be terminated or revised at any time by the Fund
and/or any of such Dean Witter Funds for which shares of the Fund have been
exchanged, upon such notice as may be required by applicable regulatory
agencies. Shareholders maintaining margin accounts with DWR or another
Selected Broker-Dealer are referred to their account executive regarding
restrictions on exchange of shares of the Fund pledged in the margin account.

   The current prospectus for each fund describes its investment objective(s)
and policies, and shareholders should obtain a copy and examine it carefully
before investing. Exchanges are subject to the minimum investment requirement
and any other conditions imposed by each fund. An exchange will be treated
for federal income tax purposes the same as a repurchase or redemption of
shares, on which the shareholder may realize a capital gain or loss. However,
the ability to deduct capital losses on an exchange may be limited in
situations where there is an exchange of shares within ninety days after the
shares are purchased. The Exchange Privilege is only available in states
where an exchange may legally be made.

   If DWR or another Selected Broker-Dealer is the current dealer of record
and its account numbers are part of the account information, shareholders may
initiate an exchange of shares of the Fund for shares of any of the Dean
Witter Funds (for which the Exchange Privilege is available) pursuant to this
Exchange Privilege by contacting their account executive (no Exchange
Privilege Authorization Form is required). Other shareholders (and those
shareholders who are clients of DWR or another Selected Broker-Dealer but who
wish to make exchanges directly by writing or telephoning the Transfer Agent)
must complete and forward to the Transfer Agent an Exchange Privilege
Authorization Form, copies of which may be obtained from the Transfer Agent,
to initiate an exchange. If the Authorization Form is used, exchanges may be
made in writing or by contacting the Transfer Agent at (800) 869-NEWS
(toll-free).

   The Fund will employ reasonable procedures to confirm that exchange
instructions communicated over the telephone are genuine. Such procedures may
include requiring various forms of personal identification such as name,
mailing address, social security or other tax identification number and DWR
or other Selected Broker-Dealer account number (if any). Telephone
instructions may also be recorded. If such procedures are not employed, the
Fund may be liable for any losses due to unauthorized or fraudulent
instructions.

   Telephone exchange instructions will be accepted if received by the
Transfer Agent between 9:00 a.m. and 4:00 p.m., New York time, on any day the
New York Stock

                               14



     
<PAGE>

Exchange is open. Any shareholder wishing to make an exchange who has
previously filed an Exchange Privilege Authorization Form and who is unable
to reach the Fund by telephone should contact his or her DWR or other
Selected Broker-Dealer account executive, if appropriate, or make a written
exchange request. Shareholders are advised that during periods of drastic
economic or market changes, it is possible that the telephone exchange
procedures may be difficult to implement, although this has not been the case
with the Dean Witter Funds in the past.

   Shareholders should contact their DWR or other Selected Broker-Dealer
account executive or the Transfer Agent for further information about the
Exchange Privilege.

REDEMPTIONS AND REPURCHASES
- -----------------------------------------------------------------------------
REDEMPTION. Shares of the Fund can be redeemed for cash at any time at the
net asset value per share next determined; however, such redemption proceeds
may be reduced by the amount of any applicable contingent deferred sales
charges (see below). If shares are held in a shareholder's account without a
share certificate, a written request for redemption to the Fund's Transfer
Agent at P.O. Box 983, Jersey City, NJ 07303 is required. If certificates are
held by the shareholder, the shares may be redeemed by surrendering the
certificates with a written request for redemption, along with any additional
information required by the Transfer Agent.

CONTINGENT DEFERRED SALES CHARGE. Shares of the Fund which are held for six
years or more after purchase (calculated from the last day of the month in
which the shares were purchased) will not be subject to any charge upon
redemption. Shares redeemed sooner than six years after purchase may,
however, be subject to a charge upon redemption. This charge is called a
"contingent deferred sales charge" ("CDSC"), which will be a percentage of
the dollar amount of shares redeemed and will be assessed on an amount equal
to the lesser of the current market value or the cost of the shares being
redeemed. The size of this percentage will depend upon how long the shares
have been held, as set forth in the table below:

<TABLE>
<CAPTION>
                               CONTINGENT DEFERRED
         YEAR SINCE               SALES CHARGE
          PURCHASE             AS A PERCENTAGE OF
        PAYMENT MADE             AMOUNT REDEEMED
- --------------------------  -----------------------
<S>                         <C>
First .....................           5.0%
Second ....................           4.0%
Third .....................           3.0%
Fourth ....................           2.0%
Fifth .....................           2.0%
Sixth .....................           1.0%
Seventh and thereafter  ...           None
</TABLE>

   A CDSC will not be imposed on: (i) any amount which represents an increase
in value of shares purchased within the six years preceding the redemption;
(ii) the current net asset value of shares purchased more than six years
prior to the redemption; and (iii) the current net asset value of shares
purchased through reinvestment of dividends or distributions and/or shares
acquired in exchange for shares of Dean Witter Funds sold with a front-end
sales charge or of other Dean Witter Funds acquired in exchange for such
shares. Moreover, in determining whether a CDSC is applicable it will be
assumed that amounts described in (i), (ii) and (iii) above (in that order)
are redeemed first. In addition, no CDSC will be imposed on redemptions of
shares which are attributable to reinvestment of dividends or distributions
from, or the proceeds of, certain Unit Investment Trusts.

   In addition, the CDSC, if otherwise applicable, will be waived in the case
of: (i) redemptions of shares held at the time a shareholder dies or becomes
disabled, only if the shares are (a) registered either in the name of an
individual shareholder (not a trust), or in the names of such shareholder and
his or her spouse as joint tenants with right of survivorship, or (b) held in
a qualified corporate or self-employed retirement plan, Individual Retirement
Account or Custodial Account under Section 403(b)(7) of the Internal Revenue
Code, provided in either case that the redemption is requested within one
year of the death or initial determination of disability, and (ii)
redemptions in connection with the following retirement plan distributions:
(a) lump-sum or other distributions from a qualified corporate or
self-employed retirement plan following retirement (or in the case of a "key
employee" of a "top heavy" plan, following attainment of age 59 1/2 ); (b)
distributions from an Individual Retirement Account or Custodial Account
under Section 403(b)(7) of the Internal Revenue Code following attainment of
age 59 1/2 ; and (c) a tax-free return of an excess contribution to an IRA.
For the purpose of determining disability, the Distributor utilizes the
definition of disability contained in Section 72(m)(7) of the Internal
Revenue Code, which relates to the inability

                               15



     
<PAGE>

to engage in gainful employment. All waivers will be granted only following
receipt by the Distributor of confirmation of the investor's entitlement.

REPURCHASE. DWR and other Selected Broker-Dealers are authorized to
repurchase shares represented by a share certificate which is delivered to
any of their offices. Shares held in a shareholder's account without a share
certificate may also be repurchased by DWR and other Selected Broker-Dealers
upon the telephonic request of the shareholder. The repurchase price is the
net asset value next computed (see "Purchase of Fund Shares") after such
purchase order is received by DWR or other Selected Broker-Dealer, reduced by
any applicable CDSC.

   The CDSC, if any, will be the only fee imposed by the Fund, the
Distributor, DWR or other Selected Broker-Dealers. The offer by DWR and other
Selected Broker-Dealers to repurchase shares may be suspended without notice
by them at any time. In that event, shareholders may redeem their shares
through the Fund's Transfer Agent as set forth above under "Redemption."

PAYMENT FOR SHARES REDEEMED OR REPURCHASED. Payment for shares presented for
repurchase or redemption will be made by check within seven days after
receipt by the Transfer Agent of the certificate and/or written request in
good order. Such payment may be postponed or the right of redemption
suspended under unusual circumstances, e.g., when normal trading is not
taking place on the New York Stock Exchange. If the shares to be redeemed
have recently been purchased by check, payment of the redemption proceeds may
be delayed for the minimum time needed to verify that the check used for
investment has been honored (not more than fifteen days from the time of
receipt of the check by the Transfer Agent). Shareholders maintaining margin
accounts with DWR or another Selected Broker-Dealer are referred to their
account executives regarding restrictions on redemption of shares of the Fund
pledged in the margin account.

REINSTATEMENT PRIVILEGE. A shareholder who has had his or her shares redeemed
or repurchased and has not previously exercised this reinstatement privilege
may, within thirty days after the date of the redemption or repurchase,
reinstate any portion or all of the proceeds of such redemption or repurchase
in shares of the Fund at their net asset value next determined after a
reinstatement request, together with the proceeds, is received by the
Transfer Agent and receive a pro-rata credit for any CDSC paid in connection
with such redemption or repurchase.

INVOLUNTARY REDEMPTION. The Fund reserves the right, on sixty days' notice,
to redeem, at their net asset value, the shares of any shareholder (other
than shares held in an Individual Retirement Account or custodial account
under Section 403(b)(7) of the Internal Revenue Code) whose shares due to
redemptions by the shareholder have a value of less than $100, or such lesser
amount as may be fixed by the Board of Trustees. However, before the Fund
redeems such shares and sends the proceeds to the shareholder, it will notify
the shareholder that the value of the shares is less than $100 and allow the
shareholder sixty days to make an additional investment in an amount which
will increase the value of his or her account to $100 or more before the
redemption is processed. No CDSC will be imposed on any involuntary
redemption.

DIVIDENDS, DISTRIBUTIONS AND TAXES
- -----------------------------------------------------------------------------
DIVIDENDS AND DISTRIBUTIONS. The Fund intends to distribute substantially
all of its net investment income and net realized short-term and long-term
capital gains, if any, at least once each year. The Fund may, however,
determine to retain all orpart of any net long-term capital gains in any year
for reinvestment.

   All dividends and any capital gains distributions will be paid in
additional Fund shares and automatically credited to the shareholder's
account without issuance of a share certificate unless the shareholder
requests in writing that all dividends and/or distributions be paid in cash.
(See "Shareholder Services--Automatic Investment of Dividends and
Distributions.")

TAXES. Because the Fund intends to distribute all of its net investment
income and net capital gains (to the extent not offset by capital loss
carryovers) to shareholders and remain qualified as a regulated investment
company under Subchapter M of the Internal Revenue Code, it is not expected
that the Fund will be required to pay any federal income tax. Shareholders
who are required to pay taxes on their income will normally have to pay
federal income taxes, and any state income taxes, on any dividends and
distributions they receive from the Fund. Such dividends and distributions,
to the extent they are derived from net investment income and net short-term
capital gains, are taxable to the shareholder as ordinary

                               16



     
<PAGE>

dividend 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. Capital gains distributions are not
eligible for the corporate dividends received deduction.

   After the end of the calendar year, shareholders will receive full
information on their dividends and capital gains distributions for tax
purposes. To avoid being subject to a 31% federal backup withholding tax on
taxable dividends, capital gains distributions and the proceeds of
redemptions and repurchases, shareholders' taxpayer identification numbers
must be furnished and certified as to accuracy.

   Shareholders should consult their tax advisers as to the applicability of
the foregoing to their current situation.

PERFORMANCE INFORMATION
- -----------------------------------------------------------------------------

   From time to time the Fund may quote its "total return" in advertisements
and sales literature. The total return of the Fund is based on historical
earnings and is not intended to indicate future performance. The "average
annual total return" of the Fund refers to a figure reflecting the average
annualized percentage increase (or decrease) in the value of an initial
investment in the Fund of $1,000 over periods of one, five and ten years.
Average annual total return reflects all income earned by the Fund, any
appreciation or depreciation of the Fund's assets, all expenses incurred by
the Fund and all sales charges which will be incurred by redeeming
shareholders, for the stated periods. It also assumes reinvestment of all
dividends and distributions paid by the Fund.

   In addition to the foregoing, the Fund may advertise its total return over
different periods of time by means of aggregate, average, year by year or
other types of total return figures. Such calculations may or may not reflect
the deduction of the contingent deferred sales charge which, if reflected,
would reduce the performance quoted. The Fund may also advertise the growth
of hypothetical investments of $10,000, $50,000 and $100,000 in shares of the
Fund. The Fund from time to time may also advertise its performance relative
to certain performance rankings and indexes compiled by independent
organizations, such as mutual fund performance rankings of Lipper Analytical
Services, Inc.

ADDITIONAL INFORMATION
- -----------------------------------------------------------------------------
VOTING RIGHTS. All shares of beneficial interest of the Fund are of $0.01
par value and are equal as to earnings, assets and voting privileges.

   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 Act or the Declaration of Trust. Under certain
circumstances the Trustees may be removed by action of the Trustees or by the
shareholders.

   Under Massachusetts law, shareholders of a business trust may, under
certain circumstances, be held personally liable as partners for 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 Fund obligations include such disclaimer, and provides
for indemnification and reimbursement of expenses out of the property of the
Fund 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.

CODE OF ETHICS. Directors, officers and employees of InterCapital, Dean
Witter Services Company Inc. and the Distributor are subject to a strict Code
of Ethics adopted by those companies. The Code of Ethics is intended to
ensure that the interests of shareholders and other

                               17



     
<PAGE>

clients are placed ahead of any personal interest, that no undue personal
benefit is obtained from a person's employment activities and that actual and
potential conflicts of interest are avoided. To achieve these goals and
comply with regulatory requirements, the Code of Ethics requires, among other
things, that personal securities transactions by employees of the companies
be subject to an advance clearance process to monitor that no Dean Witter
Fund is engaged at the same time in a purchase or sale of the same security.
The Code of Ethics bans the purchase of securities in an initial public
offering, and also prohibits engaging in futures and option transactions and
profiting on short-term trading (that is, a purchase within sixty days of a
sale or a sale within sixty days of a purchase) of a security. In addition,
investment personnel may not purchase or sell a security for their personal
account within thirty days before or after any transaction in any Dean Witter
Fund managed by them. Any violations of the Code of Ethics are subject to
sanctions, including reprimand, demotion or suspension or termination of
employment. The Code of Ethics comports with regulatory requirements and the
recommendations in the recent report by the Investment Company Institute
Advisory Group on Personal Investing.

SHAREHOLDER INQUIRIES. All inquiries regarding the Fund should be directed to
the Fund at the telephone numbers or address set forth on the front cover of
this Prospectus.













                               18



     
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DEAN WITTER
DEVELOPING GROWTH SECURITIES TRUST
TWO WORLD TRADE CENTER
NEW YORK, NEW YORK 10048

BOARD OF TRUSTEES

Jack F. Bennett
Michael Bozic
Charles A. Fiumefreddo
Edwin J. Garn
John R. Haire
Dr. Manuel H. Johnson
Paul Kolton
Michael E. Nugent
Philip J. Purcell
John L. Schroeder

OFFICERS

Charles A. Fiumefreddo
Chairman and Chief Executive Officer

Sheldon Curtis
Vice President, Secretary and
General Counsel

Jayne Stevlingson
Vice President

Thomas F. Caloia
Treasurer

CUSTODIAN

The Bank of New York
90 Washington Street
New York, New York 10286

TRANSFER AGENT AND
DIVIDEND DISBURSING AGENT

Dean Witter Trust Company
Harborside Financial Center
Plaza Two
Jersey City, New Jersey 07311

INDEPENDENT ACCOUNTANTS

Price Waterhouse LLP
1177 Avenue of the Americas
New York, New York 10036

INVESTMENT MANAGER

Dean Witter InterCapital Inc.






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