WITTER DEAN S&P 500 INDEX FUND
497, 1997-09-03
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                                               Filed Pursuant to Rule 497(e)
                                               Registration File No.: 333-29721


DEAN WITTER 
S&P 500 INDEX FUND 

PROSPECTUS -- AUGUST 6, 1997 
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Dean Witter S&P 500 Index Fund (the "Fund") is an open-end, diversified 
management investment company whose investment objective is to provide 
investment results that, before expenses, correspond to the total return 
(i.e., the combination of capital changes and income) of the Standard & 
Poor's(Registered Trademark) 500 Composite Stock Price Index (the "S&P 500 
Index"). The Fund seeks to meet its investment objective by investing, under 
normal circumstances, at least 80% of the value of its total assets in common 
stocks included in the S&P 500 Index in approximately the same weightings as 
the Index. See "Risk Considerations and Investment Practices." 

Initial Offering--Shares are being offered in an underwriting by Dean Witter 
Distributors Inc. at $10.00 per share for Class B, Class C and Class D shares 
with all proceeds going to the Fund and at $10.00 per share plus a sales 
charge as set forth herein under "Purchase of Fund Shares--Continuous 
Offering--Initial Sales Charge Alternative--Class A Shares" for Class A 
shares with the sales charge paid to the Underwriter and $10.00 per share 
going to the Fund. All expenses in connection with the organization of the 
Fund and this offering will be paid by the Investment Manager and Underwriter 
except for a maximum of $250,000 of organizational expenses to be reimbursed 
by the Fund. The initial offering will run from approximately August 25, 1997 
through September 23, 1997. 

Continuous Offering--A continuous offering will commence approximately two 
weeks after the closing date of the initial offering which is anticipated for 
September 26, 1997. Class B, Class C and Class D shares will be priced at the 
net asset value per share and Class A shares will be priced at the net asset 
value per share plus a sales charge, in each case as next determined 
following receipt of an order. 

The Fund offers four classes of shares (each, a "Class"), each with a 
different combination of sales charges, ongoing fees and other features. The 
different distribution arrangements permit an investor to choose the method 
of purchasing shares that the investor believes is most beneficial given the 
amount of the purchase, the length of time the investor expects to hold the 
shares and other relevant circumstances. (See "Purchase of Fund 
Shares--Alternative Purchase Arrangements.") 

DEAN WITTER 
S&P 500 INDEX FUND 
TWO WORLD TRADE CENTER 
NEW YORK, NEW YORK 10048 
(212) 392-2550 OR 
(800) 869-NEWS (TOLL-FREE) 

TABLE OF CONTENTS 

Prospectus Summary ....................................................      2 

Summary of Fund Expenses ..............................................      4 

The Fund and its Management ...........................................      5 

Investment Objective and Policies .....................................      6 

 Risk Considerations and 
  Investment Practices ................................................      7 

Investment Restrictions ...............................................     10 

Underwriting ..........................................................     10 

Purchase of Fund Shares-- 
 Continuous Offering ..................................................     11 

Shareholder Services ..................................................     21 

Redemptions and Repurchases ...........................................     24 

Dividends, Distributions and Taxes ....................................     25 

Performance Information ...............................................     26 

Additional Information ................................................     26 

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 August 6, 1997, which has been filed with the 
Securities and Exchange Commission, and which is available at no charge upon 
request of the Fund at the address or telephone numbers listed on this page. 
The Statement of Additional Information is incorporated herein by reference. 

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. 

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

       DEAN WITTER DISTRIBUTORS INC. 
       DISTRIBUTOR 

         
<PAGE>
<TABLE>
<CAPTION>

PROSPECTUS SUMMARY 
- ------------------------------------------------------------------------------------- 
<S>                 <C>
The                 The Fund is organized as a trust, commonly known as a 
Fund                Massachusetts business trust, and is an open-end, diversified 
                    management investment company. The Fund invests primarily in 
                    common stocks included in the Standard & Poor's(Registered 
                    Trademark) 500 Composite Stock Price Index (the "S&P 500 Index"). 
- ------------------- ------------------------------------------------------------------ 
Shares Offered      Shares of beneficial interest with $0.01 par value (see page 26). 
                    The Fund offers four Classes of shares, each with a different 
                    combination of sales charges, ongoing fees and other features (see 
                    pages 10-19). 
- ------------------- ------------------------------------------------------------------ 
Initial Offering    Shares are being offered in an underwriting by Dean Witter 
                    Distributors Inc. at $10.00 per share for each of Class B, Class C 
                    and Class D and $10.00 per share plus a sales charge for Class A. 
                    The minimum purchase for each Class is 100 shares; however, Class 
                    D shares are only available for persons who are otherwise 
                    qualified to purchase such shares. The initial offering will run 
                    approximately from August 25, 1997 through September 23, 1997. The 
                    closing will take place on September 26, 1997 or such other date 
                    as may be agreed upon by Dean Witter Distributors Inc. and the 
                    Fund (the "Closing Date"). Shares will not be issued and dividends 
                    will not be declared by the Fund until after the Closing Date. If 
                    any orders received during the initial offering period are 
                    accompanied by payment, such payment will be returned unless an 
                    accompanying request for investment in a Dean Witter money market 
                    fund is received at the time the payment is made. Any purchase 
                    order may be cancelled at any time prior to the Closing Date (see 
                    page 10). 
- ------------------- ------------------------------------------------------------------ 
Continuous          A continuous offering, if any, will commence within approximately 
Offering            two weeks after the Closing Date. During the continuous offering, 
                    the minimum initial investment for each Class is $1,000 ($100 if 
                    the account is opened through EasyInvest (Service Mark) ). Class D 
                    shares are only available to persons investing $5 million or more 
                    and to certain other limited categories of investors. For the 
                    purpose of meeting the minimum $5 million investment for Class D 
                    shares, and subject to the $1,000 minimum initial investment for 
                    each Class of the Fund, an investor's existing holdings of Class A 
                    shares and shares of funds for which Dean Witter InterCapital Inc. 
                    serves as investment manager ("Dean Witter Funds") that are sold 
                    with a front-end sales charge, and concurrent investments in Class 
                    D shares of the Fund and other Dean Witter Funds that are multiple 
                    class funds, will be aggregated. The minimum subsequent investment 
                    is $100 (see page 11). 
- ------------------- ------------------------------------------------------------------ 
Investment          The investment objective of the Fund is to provide investment 
Objective           results that, before expenses, correspond to the total return 
                    (i.e., the combination of capital changes and income) of the S&P 
                    500 Index (see page 6). 
- ------------------- ------------------------------------------------------------------ 
Investment Manager  Dean Witter InterCapital Inc., the Investment Manager of the Fund, 
                    and its wholly-owned subsidiary, Dean Witter Services Company 
                    Inc., serve in various investment management, advisory, management 
                    and administrative capacities to 100 investment companies and 
                    other portfolios with net assets under management of approximately 
                    $96.6 billion at June 30, 1997 (see page 5). 
- ------------------- ------------------------------------------------------------------ 
Management Fee      The Investment Manager receives a monthly fee at the annual rate 
                    of 0.40% of the Fund's average daily net assets. The Investment 
                    Manager has agreed to assume all expenses (except for brokerage 
                    and 12b-1 fees) and to waive the compensation provided for in its 
                    Management Agreement to the extent that such expenses and 
                    compensation on an annualized basis exceed 0.50% of the daily net 
                    assets of the Fund (see page 5). 
- ------------------- ------------------------------------------------------------------ 
Distributor and     Dean Witter Distributors Inc. (the "Distributor"). The Fund has 
Distribution Fee    adopted a distribution plan pursuant to Rule 12b-1 under the 
                    Investment Company Act (the "12b-1 Plan") with respect to the 
                    distribution fees paid by the Class A, Class B and Class C shares 
                    of the Fund to the Distributor. The entire 12b-1 fee payable by 
                    Class A and a portion of the 12b-1 fee payable by each of Class B 
                    and Class C equal to 0.25% of the average daily net assets of the 
                    Class are currently each characterized as a service fee within the 
                    meaning of the National Association of Securities Dealers, Inc. 
                    guidelines. The remaining portion of the 12b-1 fee, if any, is 
                    characterized as an asset-based sales charge (see pages 11 and 
                    19). 

                                2           
<PAGE>
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Alternative         Four classes of shares are offered: 
Purchase            
Arrangements        o Class A shares are offered with a front-end sales charge, starting 
                    at 5.25% and reduced for larger purchases. Investments of $1 million
                    or more (and investments by certain other limited categories of 
                    investors) are not subject to any sales charge at the time of purchase
                    but a contingent deferred sales charge ("CDSC") of 1.0% may be imposed 
                    on redemptions within one year of purchase. The Fund is authorized 
                    to reimburse the Distributor for specific expenses incurred in 
                    promoting the distribution of the Fund's Class A shares and 
                    servicing shareholder accounts pursuant to the Fund's 12b-1 Plan. 
                    Reimbursement may in no event exceed an amount equal to payments 
                    at an annual rate of 0.25% of average daily net assets of the 
                    Class (see pages 11, 14 and 19). 

                    o Class B shares are offered without a front-end sales charge, but 
                    will in most cases be subject to a CDSC (scaled down from 5.0% to 
                    1.0%) if redeemed within six years after purchase. The CDSC will be
                    imposed on any redemption of shares if after such redemption the 
                    aggregate current value of a Class B account with the Fund falls 
                    below the aggregate amount of the investor's purchase payments made 
                    during the six years preceding the redemption. A different CDSC 
                    schedule applies to investments by certain qualified plans. Class B 
                    shares are also subject to a 12b-1 fee assessed at the annual rate of 
                    1.0% of the average daily net assets of Class B. Class B shares 
                    convert to Class A shares approximately ten years after the date 
                    of the original purchase (see pages 11, 16 and 19). 

                    o Class C shares are offered without a front-end sales charge, but 
                    will in most cases be subject to a CDSC of 1.0% if redeemed within 
                    one year after purchase. The Fund is authorized to reimburse the 
                    Distributor for specific expenses incurred in promoting the 
                    distribution of the Fund's Class C shares and servicing 
                    shareholder accounts pursuant to the Fund's 12b-1 Plan. 
                    Reimbursement may in no event exceed an amount equal to payments 
                    at an annual rate of 1.0% of average daily net assets of the Class 
                    (see pages 11 and 19). 

                    o Class D shares are offered only to investors meeting an initial 
                    investment minimum of $5 million and to certain other limited categories
                    of investors. Class D shares are offered without a front-end sales charge 
                    or CDSC and are not subject to any 12b-1 fee (see pages 11 and 19). 
- ------------------- ------------------------------------------------------------------ 
Dividends and       Dividends from net investment income and distributions from net 
Capital Gains       capital gains, if any, are paid at least once each year. The Fund 
Distributions       may, however, determine to retain all or part of any net long-term 
                    capital gains in any year for reinvestment. Dividends and capital 
                    gains distributions paid on shares of a Class are automatically 
                    reinvested in additional shares of the same Class at net asset 
                    value unless the shareholder elects to receive cash. Shares 
                    acquired by dividend and distribution reinvestment will not be 
                    subject to any sales charge or CDSC (see pages 21 and 25). 
- ------------------- ------------------------------------------------------------------ 
Redemption          Shares are redeemable by the shareholder at net asset value less 
                    any applicable CDSC on Class A, Class B or Class C shares. An 
                    account may be involuntarily redeemed if the total value of the 
                    account is less than $100 or, if the account was opened through 
                    EasyInvest (Service Mark), if after twelve months the shareholder 
                    has invested less than $1,000 in the account (see page 24). 
- ------------------- ------------------------------------------------------------------ 
Risk                An investment in the Fund should be considered a long-term holding 
Considerations      and subject to all the risks associated with investing in equity 
                    securities. The market value of the Fund's portfolio securities 
                    and, therefore, the Fund's net asset value per share, will 
                    increase or decrease due to a variety of economic, market or 
                    political factors which cannot be predicted. The Fund operates as 
                    a "straight" index fund and will therefore not be actively 
                    managed; as such, the adverse performance of a portfolio security 
                    will ordinarily not result in the elimination of the security from 
                    the Fund's portfolio. The Fund may enter into repurchase 
                    agreements, may lend its portfolio securities and may utilize 
                    transactions involving stock index futures which may be considered 
                    speculative in nature and may involve greater risks than those 
                    customarily assumed by other investment companies which do not 
                    invest in such instruments. An investment in shares of the Fund 
                    should not be considered a complete investment program and is not 
                    appropriate for all investors. Investors should carefully consider 
                    their ability to assume these risks and the risks outlined under 
                    the heading "Risk Considerations and Investment Practices" (page 
                    7) before making an investment in the Fund. 
- --------------------------------------------------------------------------------------
</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 estimated annualized fees and expenses set forth in 
the table below are based on the expenses and fees for the fiscal period 
ending July 31, 1998. 

<TABLE>
<CAPTION>
                                                       Class A      Class B      Class C      Class D 
                                                    ------------ ------------ ------------ ----------- 
<S>                                                 <C>          <C>          <C>          <C>
Shareholder Transaction Expenses 
- -------------------------------- 
Maximum Sales Charge Imposed on Purchases (as a 
 percentage of offering price) .....................     5.25%(1)     None         None        None 
Sales Charge Imposed on Dividend Reinvestments  ....     None         None         None        None 
Maximum Contingent Deferred Sales Charge 
 (as a percentage of original purchase price or 
 redemption proceeds)...............................     None(2)      5.00%(3)     1.00%(4)    None 
Redemption Fees.....................................     None         None         None        None 
Exchange Fee........................................     None         None         None        None 
Annual Fund Operating Expenses (as a percentage of average net assets) 
- ----------------------------------------------------------------------
Management Fees+ ...................................     0.22%        0.22%        0.22%       0.22% 
12b-1 Fees (5)(6)...................................     0.25%        1.00%        1.00%       None 
Other Expenses+ ....................................     0.28%        0.28%        0.28%       0.28% 
Total Fund Operating Expenses+......................     0.75%        1.50%        1.50%       0.50% 
</TABLE>

- ------------ 
+      The Investment Manager has agreed to assume all operating expenses 
       (except for brokerage and 12b-1 fees) and to waive the compensation 
       provided for in its Management Agreement until such time as the Fund 
       has $50 million of net assets or six months from the date of 
       commencement of the Fund's operations, whichever occurs first. 
       Thereafter, the Investment Manager has agreed to assume all expenses 
       (except for brokerage and 12b-1 fees) and to waive the compensation 
       provided for in its Management Agreement to the extent that such 
       expenses and compensation on an annualized basis exceed 0.50% of the 
       daily net assets of the Fund. The fees and expenses disclosed above do 
       not reflect the initial assumption of any expenses or the waiver of any 
       compensation by the Investment Manager, but do reflect the assumption 
       of expenses and waiver of compensation by the Investment Manager to the 
       extent that such expenses and compensation on an annualized basis 
       exceed 0.50% of the daily net assets of the Fund. 

(1)    Reduced for purchases of $25,000 and over (see "Purchase of Fund 
       Shares--Initial Sales Charge Alternative--Class A Shares"). 

(2)    Investments that are not subject to any sales charge at the time of 
       purchase are subject to a CDSC of 1.00% that will be imposed on 
       redemptions made within one year after purchase, except for certain 
       specific circumstances (see "Purchase of Fund Shares--Initial Sales 
       Charge Alternative--Class A Shares"). 

(3)    The CDSC is scaled down to 1.00% during the sixth year, reaching zero 
       thereafter. 

(4)    Only applicable to redemptions made within one year after purchase (see 
       "Purchase of Fund Shares--Level Load Alternative--Class C Shares"). 

(5)    The 12b-1 fee is accrued daily and payable monthly. The entire 12b-1 
       fee payable by Class A and a portion of the 12b-1 fee payable by each 
       of Class B and Class C equal to 0.25% of the average daily net assets 
       of the Class are currently each characterized as a service fee within 
       the meaning of National Association of Securities Dealers, Inc. 
       ("NASD") guidelines and are payments made for personal service and/or 
       maintenance of shareholder accounts. The remainder of the 12b-1 fee, if 
       any, is an asset-based sales charge, and is a distribution fee paid to 
       the Distributor to compensate it for the services provided and the 
       expenses borne by the Distributor and others in the distribution of the 
       Fund's shares (see "Purchase of Fund Shares--Plan of Distribution"). 

(6)    Upon conversion of Class B shares to Class A shares, such shares will 
       be subject to the lower 12b-1 fee applicable to Class A shares. No 
       sales charge is imposed at the time of conversion of Class B shares to 
       Class A shares. Class C shares do not have a conversion feature and, 
       therefore, are subject to an ongoing 1.00% distribution fee (see 
       "Purchase of Fund Shares--Alternative Purchase Arrangements"). 

                                4           
<PAGE>
<TABLE>
<CAPTION>

EXAMPLES                                                                        1 Year   3 Years 
- ----------------------------------------------------------------------------- -------- --------- 
<S>                                                                           <C>      <C>
You would pay the following expenses on a $1,000 investment assuming (1) a 5% 
annual return and (2) redemption at the end of each time period: 
  Class A ....................................................................   $60       $75 
  Class B ....................................................................   $65       $77 
  Class C.....................................................................   $25       $47 
  Class D ....................................................................   $ 5       $16 

You would pay the following expenses on the same $1,000 investment assuming 
no redemption at the end of the period: 
  Class A ....................................................................   $60       $75 
  Class B ....................................................................   $15       $47 
  Class C ....................................................................   $15       $47 
  Class D ....................................................................   $ 5       $16 
</TABLE>

   THE ABOVE EXAMPLES SHOULD NOT BE CONSIDERED A REPRESENTATION OF FUTURE 
EXPENSES OR PERFORMANCE. ACTUAL EXPENSES OF EACH CLASS MAY BE GREATER OR LESS 
THAN THOSE SHOWN. 

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

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

THE FUND AND ITS MANAGEMENT 
- ----------------------------------------------------------------------------- 

   Dean Witter S&P 500 Index Fund (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 The 
Commonwealth of Massachusetts on June 18, 1997. 

   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 Morgan Stanley, 
Dean Witter, Discover & 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. 

   InterCapital and its wholly-owned subsidiary, Dean Witter Services Company 
Inc., serve in various investment management, advisory, management and 
administrative capacities to 100 investment companies, thirty of which are 
listed on the New York Stock Exchange, with combined assets of approximately 
$93.1 billion at June 30, 1997. The Investment Manager also manages 
portfolios of pension plans, other institutions and individuals which 
aggregated approximately $3.5 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. 

                                5           
<PAGE>
   The Fund's Trustees review the various services provided by 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 incurred by the Investment Manager, the Fund 
pays the Investment Manager monthly compensation calculated daily by applying 
the annual rate of 0.40% to the Fund's net assets. The Investment Manager has 
agreed to assume all operating expenses (except for brokerage and 12b-1 fees) 
and to waive the compensation provided for in its Management Agreement until 
such time as the Fund has $50 million of net assets or six months from the 
date of commencement of the Fund's operations, whichever occurs first. 
Thereafter, the Investment Manager has agreed to assume all expenses (except 
for brokerage and 12b-1 fees) and to waive the compensation provided for in 
its Management Agreement to the extent that such expenses and compensation on 
an annualized basis exceed 0.50% of the daily net assets of the Fund. 

   The Fund's expenses include: the fee of the Investment Manager; the fee 
pursuant to the Plan of Distribution (see "Purchase of Fund Shares"); taxes; 
transfer agent, custodian, auditing fees; and certain legal fees, and 
printing and other expenses relating to the Fund's operations which are not 
expressly assumed by the Investment Manager under its Investment Management 
Agreement with the Fund. The Investment Manager has undertaken to assume all 
operating expenses (except for brokerage and 12b-1 fees) and to waive the 
compensation provided for in its Investment Management Agreement until such 
time as the Fund has $50 million in net assets or until six months from the 
date of the Fund's commencement of operations, whichever occurs first. 

INVESTMENT OBJECTIVE AND POLICIES 
- ----------------------------------------------------------------------------- 

   The investment objective of the Fund is to provide investment results 
that, before expenses, correspond to the total return (i.e., the combination 
of capital changes and income) of the Standard & Poor's(Registered Trademark) 
500 Composite Stock Price Index (the "S&P 500 Index"). The objective is a 
fundamental policy of the Fund and may not be changed without a vote of a 
majority of the outstanding voting securities of the Fund. There is no 
assurance that the objective will be achieved. The following policies may be 
changed by the Board of Trustees without shareholder approval. 

   The Fund seeks to achieve its objective by investing, under normal 
circumstances, at least 80% of its total assets in common stocks included in 
the S&P 500 Index in approximately the same weightings as the Index. The Fund 
intends to invest in substantially all of the stocks that comprise the S&P 
500 Index in approximately the same weightings as they are represented in the 
Index. The Fund operates as a "straight" index fund and will not be actively 
managed; as such, adverse performance of a security will ordinarily not 
result in the elimination of the security from the Fund's portfolio. The Fund 
will remain invested in common stocks even when stock prices are generally 
falling. Ordinarily, portfolio securities will not be sold except to reflect 
additions or deletions of the stocks that comprise the S&P 500 Index, 
including mergers, reorganizations and similar transactions, or as may be 
necessary to satisfy redemption requests. 

   Over the long term, the Investment Manager seeks a correlation between the 
performance of the Fund, before expenses, and that of the S&P 500 Index of 
0.95 or better. A figure of 1.00 would indicate perfect correlation. The 
Fund's ability to correlate its performance, before expenses, with the S&P 
500 Index may be affected by, among other things, changes in securities 
markets, the manner in which the S&P 500 Index is calculated and the timing 
of purchases and redemptions. The Fund's ability to correlate its performance 
to the Index also depends to some extent on the size of the Fund's portfolio 
and the size of cash flows into and out of 

                                6           
<PAGE>
the Fund. To accomodate these cash flows, investment changes may be made to 
maintain the similarity of the Fund's portfolio to the S&P 500 Index to the 
maximum practicable extent. The Investment Manager regularly monitors the 
correlation and, in the event the desired correlation is not achieved, the 
Investment Manager will determine what additional investment changes may need 
to be made. 

   Stock Index Futures Contracts. The Fund may purchase and sell stock index 
futures contracts ("futures contracts") that are traded on U.S. commodity 
exchanges on the S&P 500 Index ("stock index" futures). As a futures contract 
purchaser, the Fund incurs an obligation to take delivery of a specified 
amount of the obligation underlying the contract at a specified time in the 
future for a specified price. As a seller of a futures contract, the Fund 
incurs an obligation to deliver the specified amount of the underlying 
obligation at a specified time in return for an agreed upon price. The Fund 
will purchase or sell stock index futures contracts for the following 
reasons: to simulate full investment in the S&P 500 Index while retaining a 
cash balance for fund management purposes, to facilitate trading, to reduce 
transaction costs or to seek higher investment returns when a futures 
contract is priced more attractively than stocks comprising the S&P 500 
Index. The Fund may enter into such instruments provided that not more than 
5% of its assets are required as an initial margin deposit and provided that 
the contract prices of the stock index futures contracts do not exceed 20% of 
its total assets. While such instruments can be used as leveraged 
investments, the Fund may not use them to leverage its assets. 

   Additional Information Concerning the S&P 500 Index. The S&P 500 Index is 
a well-known stock market index that includes common stocks of 500 companies 
from several industrial sectors representing a significant portion of the 
market value of all common stocks publicly traded in the United States, most 
of which are listed on the New York Stock Exchange Inc. (the "NYSE"). Stocks 
in the S&P 500 Index are weighted according to their market capitalization 
(i.e., the number of shares outstanding multiplied by the stock's current 
price). The Investment Manager believes that the performance of the S&P 500 
Index is representative of the performance of publicly traded common stocks 
in general. The composition of the S&P 500 Index is determined by S&P and is 
based on such factors as the market capitalization and trading activity of 
each stock and its adequacy as a representation of stocks in a particular 
industry group, and may be changed from time to time. 

   "Standard & Poor's(Registered Trademark)," "S&P(Registered Trademark)," 
"S&P 500(Registered Trademark)," "Standard & Poor's 500," and "500" are 
trademarks of The McGraw-Hill Companies, Inc. and have been licensed for use 
by the Fund. The Fund is not sponsored, endorsed, sold or promoted by 
Standard & Poor's, a division of The McGraw Hill Companies, Inc. ("Standard & 
Poor's") and Standard & Poor's makes no representation regarding the 
advisability of investing in the Fund. 

   The Fund may also invest in repurchase agreements, zero coupon securities 
and may lend its portfolio securities, as discussed under "Risk 
Considerations and Investment Practices" below. 

   The Fund reserves the right to seek to achieve its investment objective by 
converting to a "master/ feeder" fund structure (see "Additional 
Information"). 

RISK CONSIDERATIONS AND INVESTMENT PRACTICES 

   The net asset value of the Fund's shares will fluctuate with changes in 
the market value of the Fund's 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. 

   Risks of Futures Transactions. The Fund may close out its position as a 
buyer or seller of a futures contract only if a liquid secondary market 
exists for futures contracts of that series. There is no assurance that such 
a market will exist. Also, exchanges may limit the amount by which the price 
of many futures contracts may move on any day. If the price moves equal the 
daily limit on successive days, then it may prove impossible to liquidate a 
futures position until the daily limit moves have ceased. 

                                7           
<PAGE>
   The extent to which the Fund may enter into transactions involving futures 
contracts may be limited by the Internal Revenue Code's requirements for 
qualification as a regulated investment company and the Fund's intention to 
qualify as such. See "Dividends, Distributions and Taxes." 

   There may exist an imperfect correlation between the price movements of 
futures contracts purchased by the Fund and the movements in the prices of 
the securities which are the subject of the contract. If participants in the 
futures market elect to close out their contracts through offsetting 
transactions rather than meet margin deposit requirements, distortions in the 
normal relationship between the securities and futures markets could result. 

   Cash Flows; Expenses. The ability of the Fund to meet its investment 
objective depends to some extent on the Investment Manager's ability to 
manage cash flows (primarily from purchases and redemptions and distributions 
from the Fund's portfolio investments). Generally, the Investment Manager 
will employ stock index futures to provide liquidity necessary to meet 
anticipated redemptions or for day-to-day operating purposes. In addition, if 
considered appropriate in the opinion of the Investment Manager, a portion of 
a Fund's assets not exceeding 20% of its total assets may be invested in 
money market instruments. The Investment Manager will also make investment 
changes to the Fund's portfolio to accommodate cash flows while continuing to 
seek to replicate the total return of the S&P 500 Index. Investors should 
also be aware that the investment performance of the S&P 500 Index is a 
hypothetical number which does not take into account brokerage commissions 
and other transaction costs, custody and other costs of investing, which will 
be borne by the Fund, and any incremental operating costs (e.g., transfer 
agency, accounting) borne by the Fund. Finally, since the Fund seeks to 
provide investment results that, before expenses, correspond to the total 
return of the S&P 500 Index. S&P 500 Index, the Investment Manager will 
generally not attempt to judge the merits of any particular security as an 
investment. 

   Temporary Investments. A portion of the Fund's assets, not exceeding 20% 
of its total assets, may be invested temporarily in money market instruments 
under any one or more of the following circumstances: (a) pending investment 
of proceeds of sale of shares of the Fund; (b) pending settlement of 
purchases of portfolio securities; or (c) to maintain liquidity for the 
purposes of meeting anticipated redemptions. The money market instruments in 
which the Fund may invest are certificates of deposit of U.S. domestic banks 
with assets of $1 billion or more; bankers' acceptances; time deposits; U.S. 
Government and U.S. Government agency securities; or commercial paper rated 
within the two highest grades by S&P or Moody's Investors Service, Inc., or, 
if not rated, are of comparable quality as determined by the Trustees, and 
which mature within one year from the date of purchase. 

   Foreign Securities. The Fund may purchase common stocks, including 
American Depository Receipts, of foreign corporations represented in the S&P 
500 Index (such securities are listed on the New York Stock Exchange, the 
American Stock Exchange or the NASDAQ Market System). Investments in foreign 
securities may be affected by changes in governmental administration or 
economic policy (in the United States and abroad) or changed circumstances in 
dealings between nations. Foreign companies may be subject to less 
governmental regulation than U.S. companies. Securities of foreign companies 
may be more volatile than securities of U.S. companies. As noted above, the 
Fund's investment in common stock of foreign corporations represented in the 
S&P 500 Index may also be in the form of American Depository Receipts (ADRs). 
ADRs are receipts typically issued by a United States bank or trust company 
evidencing ownership of the underlying securities and are designed for use in 
the U.S. securities markets. 

   Standard & Poor's Depositary Receipts ("SPDRs"). The Fund may purchase 
interests in a unit investment trust holding a portfolio of securities linked 
to the S&P 500 Index. SPDRs closely track the underlying portfolio of 
securities, trade like a share of common stock and pay periodic dividends 

                                8           
<PAGE>
proportionate to those paid by the portfolio of stocks that comprise the S&P 
500 Index. The Fund will not invest in excess of 15% of its total assets in 
SPDRs. See the Statement of Additional Information for a further discussion 
of SPDRs. 

   Repurchase Agreements. The Fund may enter into repurchase agreements, 
which may be viewed as a type of secured lending by the Fund, and which 
typically involve the acquisition by the Fund of debt securities from a 
selling financial institution such as a bank, savings and loan association or 
broker-dealer. The agreement provides that the Fund will sell back to the 
institution, and that the institution will repurchase, the underlying 
security at a specified price and at a fixed time in the future, usually not 
more than seven days from the date of purchase. While repurchase agreements 
involve certain risks not associated with direct investments in debt 
securities, including the risks of default or bankruptcy of the selling 
financial institution, the Fund follows procedures designed to minimize such 
risks. These procedures include effecting repurchase transactions only with 
large, well-capitalized and well-established financial institutions and 
maintaining adequate collateralization. 

   Zero Coupon Securities. A portion of the money market instruments in which 
the Fund may invest may be zero coupon securities. Such securities are 
purchased at a discount from their face amount, giving the purchaser the 
right to receive their full value at maturity. The interest earned on such 
securities is, implicitly, automatically compounded and paid out at maturity. 
While such compounding at a constant rate eliminates the risk of receiving 
lower yields upon reinvestment of interest if prevailing interest rates 
decline, the owner of a zero coupon security will be unable to participate in 
higher yields upon reinvestment of interest received on interest-paying 
securities if prevailing interest rates rise. 

   A zero coupon security pays no interest to its holder during its life. 
Therefore, to the extent the Fund invests in zero coupon securities, it will 
not receive current cash available for distribution to shareholders. In 
addition, zero coupon securities are subject to substantially greater price 
fluctuations during periods of changing prevailing interest rates than are 
comparable securities which pay interest on a current basis. Current federal 
tax law requires that a holder (such as the Fund) of a zero coupon security 
accrue a portion of the discount at which the security was purchased as 
income each year even though the Fund receives no interest payments in cash 
on the security during the year. 

   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 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. 

   Except as specifically noted, all investment policies and practices 
discussed above are not fundamental policies of the Fund and, as such, may be 
changed without shareholder approval. 

PORTFOLIO MANAGEMENT 

   The Fund's portfolio is managed by its Investment Manager with a view to 
achieving the Fund's investment objective. The assets of the Fund are managed 
within InterCapital's Growth Group, which manages 31 equity funds and fund 
portfolios with approximately $13.5 billion in assets as of June 30, 

                                9           
<PAGE>
1997. Kenton J. Hinchliffe, Senior Vice President of InterCapital and a 
member of InterCapital's Growth Group, is the primary portfolio manager of 
the Fund. Mr. Hinchliffe has been a portfolio manager at InterCapital for 
over 5 years. 

   Although the Fund does not intend to engage in short-term trading of 
portfolio securities as a means of achieving its investment objective, it may 
sell portfolio securities without regard to the length of time they have been 
held whenever such sale will in the Investment Manager's opinion strengthen 
the Fund's position and contribute to its investment objective. 

   Orders for transactions in portfolio securities and commodities are placed 
for the Fund with a number of brokers and dealers, including brokers and 
dealers that are affiliates of the Investment Manager. The Fund may incur 
brokerage commissions on transactions conducted through such affiliates. 
Pursuant to an order of the Securities and Exchange Commission, the Fund may 
effect principal transactions in certain money market instruments with Dean 
Witter Reynolds Inc. ("DWR"). It is not anticipated that the portfolio 
trading will result in the Fund's portfolio turnover rate exceeding 100% in 
any one year. Ordinarily, securities will be sold from the portfolio only to 
reflect certain administrative changes in the S&P 500 Index or to accommodate 
cash flows into or out of the Fund while maintaining the similarity of the 
Fund to the S&P 500 Index. The Fund will incur brokerage costs commensurate 
with its portfolio turnover rate. See "Dividends, Distributions and Taxes" 
for a discussion of the tax implications of the Fund's trading policy. 

INVESTMENT RESTRICTIONS 
- ----------------------------------------------------------------------------- 

   The investment restrictions listed below are among the restrictions which 
have been adopted by the Fund as fundamental policies. 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. For 
purposes of the following limitations: (i) all percentage limitations apply 
immediately after a purchase or initial investment; and (ii) any subsequent 
change in any applicable percentage resulting from market fluctuations or 
other changes in total or net assets does not require elimination of any 
security from the portfolio. 

   The Fund may not: 

     1. As to 75% of its total assets, 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), except that the Fund may invest all or substantially 
    all of its assets in another registered investment company having the same 
    investment objective and policies and substantially the same investment 
    restrictions as the Fund (a "Qualifying Portfolio"). 

     2. As to 75% of its total assets, purchase more than 10% of all 
    outstanding voting securities or any class of securities of any one 
    issuer, except that the Fund may invest all or substantially all of its 
    assets in a Qualifying Portfolio. 

     3. Invest 25% or more of the value of its total assets in securities of 
    issuers in any one industry. This restriction does not apply to 
    obligations issued or guaranteed by the United States Government or its 
    agencies or instrumentalities. 

UNDERWRITING 
- ----------------------------------------------------------------------------- 

   Dean Witter Distributors Inc. (the "Underwriter") has agreed to purchase 
up to 10,000,000 shares from the Fund, which number may be increased or 
decreased in accordance with the Underwriting Agreement. The initial offering 
will run approximately from August 25, 1997 through September 23, 1997. The 
Underwriting Agreement provides that the obligation of the Underwriter is 
subject 

                               10           
<PAGE>
to certain conditions precedent and that the Underwriter will be obligated to 
purchase the shares on September 26, 1997, or such other date as may be 
agreed upon by the Underwriter and the Fund (the "Closing Date"). Shares will 
not be issued and dividends will not be declared by the Fund until after the 
Closing Date. For this reason, payment is not required to be made prior to 
the Closing Date. If any orders received during the initial offering period 
are accompanied by payment, such payment will be returned unless an 
accompanying request for investment in a Dean Witter money market fund is 
received at the time the payment is made. Prospective investors in money 
market funds should request and read the money market fund prospectus prior 
to investing. All such funds received and invested in a Dean Witter money 
market fund will be automatically invested in the Fund on the Closing Date 
without any further action by the investor. An investor may cancel his or her 
purchase of Fund shares without penalty at any time prior to the Closing 
Date. 

   The Underwriter will purchase Class B, Class C and Class D shares from the 
Fund at $10.00 per share with all proceeds going to the Fund and will 
purchase Class A shares at $10.00 per share plus a sales charge as set forth 
under "Purchase of Fund Shares--Continuous Offering--Initial Sales Charge 
Alternative--Class A Shares" with the sales charge paid to the Underwriter 
and the net asset value of $10.00 per share going to the Fund. The 
Underwriter may, however, receive contingent deferred sales charges from 
future redemptions of Class A, Class B and Class C shares (see "Purchase of 
Fund Shares--Continuous Offering"). 

   The Underwriter shall, regardless of its expected underwriting commitment, 
be entitled and obligated to purchase only the number of shares for which 
purchase orders have been received by the Underwriter prior to 2:00 p.m., New 
York time, on the third business day preceding the Closing Date, or such 
other date as may be agreed to between the parties. 

   The minimum number of Fund shares which may be purchased by any 
shareholder pursuant to this offering is 100 shares. Certificates for shares 
purchased will not be issued unless requested by the shareholder in writing. 

PURCHASE OF FUND SHARES--CONTINUOUS OFFERING 
- ----------------------------------------------------------------------------- 

GENERAL 

   Dean Witter Distributors Inc. (the "Distributor") will act as the 
Distributor of each Class of the Fund's shares during the continuous 
offering. Pursuant to a Distribution Agreement between the Fund and the 
Distributor, an affiliate of the Investment Manager, shares of the Fund are 
distributed by the Distributor and offered by DWR and other dealers which 
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 Fund offers four classes of shares (each, a "Class"). Class A shares 
are sold to investors with an initial sales charge that declines to zero for 
larger purchases; however, Class A shares sold without an initial sales 
charge are subject to a contingent deferred sales charge ("CDSC") of 1.0% if 
redeemed within one year of purchase, except for certain specific 
circumstances. Class B shares are sold without an initial sales charge but 
are subject to a CDSC (scaled down from 5.0% to 1.0%) payable upon most 
redemptions within six years after purchase. (Class B shares purchased by 
certain qualified employer-sponsored benefit plans are subject to a CDSC 
scaled down from 2.0% to 1.0% if redeemed within three years after purchase.) 
Class C shares are sold without an initial sales charge but are subject to a 
CDSC of 1.0% on most redemptions made within one year after purchase. Class D 
shares are sold without an initial sales charge or CDSC and are available 
only to investors meeting an initial investment minimum of $5 million, and to 
certain other limited categories of investors. At the discretion of the Board 
of Trustees of the Fund, Class A shares may be sold to categories of inves- 

                               11           
<PAGE>
tors in addition to those set forth in this prospectus at net asset value 
without a front-end sales charge, and Class D shares may be sold to certain 
other categories of investors, in each case as may be described in the then 
current prospectus of the Fund. See "Alternative Purchase 
Arrangements--Selecting a Particular Class" for a discussion of factors to 
consider in selecting which Class of shares to purchase. 

   The minimum initial purchase is $1,000 for each Class of shares, although 
Class D shares are only available to persons investing $5 million or more and 
to certain other limited categories of investors. For the purpose of meeting 
the minimum $5 million initial investment for Class D shares, and subject to 
the $1,000 minimum initial investment for each Class of the Fund, an 
investor's existing holdings of Class A shares of the Fund and other Dean 
Witter Funds that are multiple class funds ("Dean Witter Multi-Class Funds") 
and shares of Dean Witter Funds sold with a front-end sales charge ("FSC 
Funds") and concurrent investments in Class D shares of the Fund and other 
Dean Witter Multi-Class Funds will be aggregated. Subsequent purchases of 
$100 or more may be made by sending a check, payable to Dean Witter S&P 500 
Index Fund, directly to Dean Witter Trust FSB (the "Transfer Agent" or "DWT") 
at P.O. Box 1040, Jersey City, NJ 07303 or by contacting an account executive 
of DWR or other Selected Broker-Dealer. When purchasing shares of the Fund, 
investors must specify whether the purchase is for Class A, Class B, Class C 
or Class D shares. If no Class is specified, the Transfer Agent will not 
process the transaction until the proper Class is identified. The minimum 
initial purchase in the case of investments through EasyInvest (Service 
Mark), an automatic purchase plan (see "Shareholder Services"), is $100, 
provided that the schedule of automatic investments will result in 
investments totalling at least $1,000 within the first twelve months. 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 a request is made 
by the shareholder in writing to the Transfer Agent. 

   Shares of the Fund are sold through the Distributor on a normal three 
business day settlement basis; that is, payment is due on the third business 
day (settlement date) after the order is placed with the Distributor. 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. Sales personnel of a Selected Broker-Dealer are 
compensated for selling shares of the Fund by the Distributor and/or the 
Selected Broker-Dealer. In addition, some sales personnel of the Selected 
Broker-Dealer will receive various types of non-cash compensation as special 
sales incentives, including trips, educational and/or business seminars and 
merchandise. The Fund and the Distributor reserve the right to reject any 
purchase orders. 

ALTERNATIVE PURCHASE ARRANGEMENTS 

   The Fund offers several Classes of shares to investors designed to provide 
them with the flexibility of selecting an investment best suited to their 
needs. The general public is offered three Classes of shares: Class A shares, 
Class B shares and Class C shares, which differ principally in terms of sales 
charges and rate of expenses to which they are subject. A fourth Class of 
shares, Class D shares, is offered only to limited categories of investors 
(see "No Load Alternative--Class D Shares" below). 

   Each Class A, Class B, Class C or Class D share of the Fund represents an 
identical interest in the investment portfolio of the Fund except that Class 
A, Class B and Class C shares bear the 

                               12           
<PAGE>
expenses of the ongoing shareholder service fees, Class B and Class C shares 
bear the expenses of the ongoing distribution fees and Class A, Class B and 
Class C shares which are redeemed subject to a CDSC bear the expense of the 
additional incremental distribution costs resulting from the CDSC applicable 
to shares of those Classes. The ongoing distribution fees that are imposed on 
Class A, Class B and Class C shares will be imposed directly against those 
Classes and not against all assets of the Fund and, accordingly, such charges 
against one Class will not affect the net asset value of any other Class or 
have any impact on investors choosing another sales charge option. See "Plan 
of Distribution" and "Redemptions and Repurchases." 

   Set forth below is a summary of the differences between the Classes and 
the factors an investor should consider when selecting a particular Class. 
This summary is qualified in its entirety by detailed discussion of each 
Class that follows this summary. 

   Class A Shares. Class A shares are sold at net asset value plus an initial 
sales charge of up to 5.25%. The initial sales charge is reduced for certain 
purchases. Investments of $1 million or more (and investments by certain 
other limited categories of investors) are not subject to any sales charges 
at the time of purchase but are subject to a CDSC of 1.0% on redemptions made 
within one year after purchase, except for certain specific circumstances. 
Class A shares are also subject to a 12b-1 fee of up to 0.25% of the average 
daily net assets of the Class. See "Initial Sales Charge Alternative--Class A 
Shares." 

   Class B Shares. Class B shares are offered at net asset value with no 
initial sales charge but are subject to a CDSC (scaled down from 5.0% to 
1.0%) if redeemed within six years of purchase. (Class B shares purchased by 
certain qualified employer-sponsored benefit plans are subject to a CDSC 
scaled down from 2.0% to 1.0% if redeemed within three years after purchase.) 
This CDSC may be waived for certain redemptions. Class B shares are also 
subject to an annual 12b-1 fee of 1.0% of the average daily net assets of 
Class B. The Class B shares' distribution fee will cause that Class to have 
higher expenses and pay lower dividends than Class A or Class D shares. 

   After approximately ten (10) years, Class B shares will convert 
automatically to Class A shares of the Fund, based on the relative net asset 
values of the shares of the two Classes on the conversion date. In addition, 
a certain portion of Class B shares that have been acquired through the 
reinvestment of dividends and distributions will be converted at that time. 
See "Contingent Deferred Sales Charge Alternative--Class B Shares." 

   Class C Shares. Class C shares are sold at net asset value with no initial 
sales charge but are subject to a CDSC of 1.0% on redemptions made within one 
year after purchase. This CDSC may be waived for certain redemptions. They 
are subject to an annual 12b-1 fee of up to 1.0% of the average daily net 
assets of the Class C shares. The Class C shares' distribution fee may cause 
that Class to have higher expenses and pay lower dividends than Class A or 
Class D shares. See "Level Load Alternative--Class C Shares." 

   Class D Shares. Class D shares are available only to limited categories of 
investors (see "No Load Alternative--Class D Shares" below). Class D shares 
are sold at net asset value with no initial sales charge or CDSC. They are 
not subject to any 12b-1 fees. See "No Load Alternative--Class D Shares." 

   Selecting a Particular Class. In deciding which Class of Fund shares to 
purchase, investors should consider the following factors, as well as any 
other relevant facts and circumstances: 

   The decision as to which Class of shares is more beneficial to an investor 
depends on the amount and intended length of his or her investment. Investors 
who prefer an initial sales charge alternative may elect to purchase Class A 
shares. Investors qualifying for significantly reduced or, in the case of 
purchases of $1 million or more, no initial sales charges may find Class A 
shares particularly attractive because similar sales charge reductions 

                               13           
<PAGE>
are not available with respect to Class B or Class C shares. Moreover, Class 
A shares are subject to lower ongoing expenses than are Class B or Class C 
shares over the term of the investment. As an alternative, Class B and Class 
C shares are sold without any initial sales charge so the entire purchase 
price is immediately invested in the Fund. Any investment return on these 
additional investment amounts may partially or wholly offset the higher 
annual expenses of these Classes. Because the Fund's future return cannot be 
predicted, however, there can be no assurance that this would be the case. 

   Finally, investors should consider the effect of the CDSC period and any 
conversion rights of the Classes in the context of their own investment time 
frame. For example, although Class C shares are subject to a significantly 
lower CDSC upon redemptions, they do not, unlike Class B shares, convert into 
Class A shares after approximately ten years, and, therefore, are subject to 
an ongoing 12b-1 fee of 1.0% (rather than the 0.25% fee applicable to Class A 
shares) for an indefinite period of time. Thus, Class B shares may be more 
attractive than Class C shares to investors with longer term investment 
outlooks. Other investors, however, may elect to purchase Class C shares if, 
for example, they determine that they do not wish to be subject to a 
front-end sales charge and they are uncertain as to the length of time they 
intend to hold their shares. 

   For the purpose of meeting the $5 million minimum investment amount for 
Class D shares, holdings of Class A shares in all Dean Witter Multi-Class 
Funds, shares of FSC Funds and shares of Dean Witter Funds for which such 
shares have been exchanged, will be included together with the current 
investment amount. 

   Sales personnel may receive different compensation for selling each Class 
of shares. Investors should understand that the purpose of a CDSC is the same 
as that of the initial sales charge in that the sales charges applicable to 
each Class provide for the financing of the distribution of shares of that 
Class. 

   Set forth below is a chart comparing the sales charge, 12b-1 fees and 
conversion options applicable to each Class of shares: 

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------
                                                        CONVERSION 
   CLASS         SALES CHARGE          12B-1 FEE         FEATURE 
- --------- ------------------------- ------------- -------------------- 
<S>       <C>                       <C>           <C>
     A    Maximum 5.25%                  0.25%              No 
          initial sales charge 
          reduced for 
          purchases of 
          $25,000 and over; 
          shares sold without 
          an initial sales 
          charge generally 
          subject to a 1.0% 
          CDSC during first 
          year. 
- --------- ------------------------- ------------- -------------------- 
     B    Maximum 5.0%                   1.0%     B shares convert 
          CDSC during the first                   to A shares 
          year decreasing                         automatically 
          to 0 after six years                    after 
                                                  approximately 
                                                  ten years 
- --------- ------------------------- ------------- -------------------- 
     C    1.0% CDSC during               1.0%               No 
          first year 
- --------- ------------------------- ------------- -------------------- 
     D               None                None               No 
- ----------------------------------------------------------------------
</TABLE>

   See "Purchase of Fund Shares" and "The Fund and its Management" for a 
complete description of the sales charges and service and distribution fees 
for each Class of shares and "Determination of Net Asset Value," "Dividends, 
Distributions and Taxes" and "Shareholder Services--Exchange Privilege" for 
other differences between the Classes of shares. 

INITIAL SALES CHARGE ALTERNATIVE--CLASS A SHARES 

   Class A shares are sold at net asset value plus an initial sales charge. 
In some cases, reduced sales charges may be available, as described below. 
Investments of $1 million or more (and investments by certain other limited 
categories of investors) are not subject to any sales charges at the time of 
purchase but are subject to a CDSC of 1.0% on redemptions made within one 
year after purchase (calculated from the last day of the month in which the 
shares were purchased), except for certain specific circumstances. The CDSC 
will be assessed on an amount equal to the lesser of the current market value 
or the cost of the shares being redeemed. The CDSC will not be imposed (i) in 
the circumstances set forth below in the section "Con- 

                               14           
<PAGE>
tingent Deferred Sales Charge Alternative--Class B Shares--CDSC Waivers," 
except that the references to six years in the first paragraph of that 
section shall mean one year in the case of Class A shares, and (ii) in the 
circumstances identified in the section "Additional Net Asset Value Purchase 
Options" below. Class A shares are also subject to an annual 12b-1 fee of up 
to 0.25% of the average daily net assets of the Class. 

   The offering price of Class A shares will be the net asset value per share 
next determined following receipt of an order (see "Determination of Net 
Asset Value" below), plus a sales charge (expressed as a percentage of the 
offering price) on a single transaction as shown in the following table: 

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

   Upon notice to all Selected Broker-Dealers, the Distributor may reallow up 
to the full applicable sales charge as shown in the above schedule during 
periods specified in such notice. During periods when 90% or more of the 
sales charge is reallowed, such Selected Broker-Dealers may be deemed to be 
underwriters as that term is defined in the Securities Act of 1933. 

   The above schedule of sales charges is applicable to purchases in a single 
transaction by, among others: (a) an individual; (b) an individual, his or 
her spouse and their children under the age of 21 purchasing shares for his, 
her or their own accounts; (c) a trustee or other fiduciary purchasing shares 
for a single trust estate or a single fiduciary account; (d) a pension, 
profit-sharing or other employee benefit plan qualified or non-qualified 
under Section 401 of the Internal Revenue Code; (e) tax-exempt organizations 
enumerated in Section 501(c)(3) or (13) of the Internal Revenue Code; (f) 
employee benefit plans qualified under Section 401 of the Internal Revenue 
Code of a single employer or of employers who are "affiliated persons" of 
each other within the meaning of Section 2(a)(3)(c) of the Act; and for 
investments in Individual Retirement Accounts of employees of a single 
employer through Systematic Payroll Deduction plans; or (g) any other 
organized group of persons, whether incorporated or not, provided the 
organization has been in existence for at least six months and has some 
purpose other than the purchase of redeemable securities of a registered 
investment company at a discount. 

   Combined Purchase Privilege. Investors may have the benefit of reduced 
sales charges in accordance with the above schedule by combining purchases of 
Class A shares of the Fund in single transactions with the purchase of Class 
A shares of other Dean Witter Multi-Class Funds and shares of FSC Funds. The 
sales charge payable on the purchase of the Class A shares of the Fund, the 
Class A shares of the other Dean Witter Multi-Class Funds and the shares of 
the FSC Funds will be at their respective rates applicable to the total 
amount of the combined concurrent purchases of such shares. 

   Right of Accumulation. The above persons and entities may benefit from a 
reduction of the sales charges in accordance with the above schedule if the 
cumulative net asset value of Class A shares purchased in a single 
transaction, together with shares of the Fund and other Dean Witter Funds 
previously purchased at a price including a front-end sales charge (including 
shares of the Fund and other Dean Witter Funds acquired in exchange for those 
shares, and including in each case shares acquired through reinvestment of 
dividends and distributions), which are held at the time of such transaction, 
amounts to $25,000 or more. If such investor has a cumulative net asset value 
of shares of FSC Funds and Class A and Class D shares equal to at least $5 
million, such investor is eligible to purchase Class D shares subject to the 
$1,000 minimum initial investment requirement of that Class of the Fund. See 
"No Load Alternative--Class D Shares" below. 

                               15           
<PAGE>
   The Distributor must be notified by DWR or a Selected Broker-Dealer or the 
shareholder at the time a purchase order is placed that the purchase 
qualifies for the reduced charge under the Right of Accumulation. Similar 
notification must be made in writing by the dealer or shareholder when such 
an order is placed by mail. The reduced sales charge will not be granted if: 
(a) such notification is not furnished at the time of the order; or (b) a 
review of the records of the Selected Broker-Dealer or the Transfer Agent 
fails to confirm the investor's represented holdings. 

   Letter of Intent. The foregoing schedule of reduced sales charges will 
also be available to investors who enter into a written Letter of Intent 
providing for the purchase, within a thirteen-month period, of Class A shares 
of the Fund from DWR or other Selected Broker-Dealers. The cost of Class A 
shares of the Fund or shares of other Dean Witter Funds which were previously 
purchased at a price including a front-end sales charge during the 90-day 
period prior to the date of receipt by the Distributor of the Letter of 
Intent, or of Class A shares of the Fund or shares of other Dean Witter Funds 
acquired in exchange for shares of such funds purchased during such period at 
a price including a front-end sales charge, which are still owned by the 
shareholder, may also be included in determining the applicable reduction. 

   Additional Net Asset Value Purchase Options. In addition to investments of 
$1 million or more, Class A shares also may be purchased at net asset value 
by the following: 

   (1) trusts for which DWT (an affiliate of the Investment Manager) provides 
discretionary trustee services; 

   (2) persons participating in a fee-based program approved by the 
Distributor, pursuant to which such persons pay an asset based fee for 
services in the nature of investment advisory or administrative services 
(such investments are subject to all of the terms and conditions of such 
programs, which may include termination fees, mandatory redemption upon 
termination and such other circumstances as specified in the programs' 
agreements, and restrictions on transferability of Fund shares); 

   (3) retirement plans qualified under Section 401(k) of the Internal 
Revenue Code ("401(k) plans") and other employer-sponsored plans qualified 
under Section 401(a) of the Internal Revenue Code with at least 200 eligible 
employees and for which DWT serves as Trustee or the 401(k) Support Services 
Group of DWR serves as recordkeeper; 

   (4) 401(k) plans and other employer-sponsored plans qualified under 
Section 401(a) of the Internal Revenue Code for which DWT serves as Trustee 
or the 401(k) Support Services Group of DWR serves as recordkeeper whose 
Class B shares have converted to Class A shares, regardless of the plan's 
asset size or number of eligible employees; 

   (5) investors who are clients of a Dean Witter account executive who 
joined Dean Witter from another investment firm within six months prior to 
the date of purchase of Fund shares by such investors, if the shares are 
being purchased with the proceeds from a redemption of shares of an open-end 
proprietary mutual fund of the account executive's previous firm which 
imposed either a front-end or deferred sales charge, provided such purchase 
was made within sixty days after the redemption and the proceeds of the 
redemption had been maintained in the interim in cash or a money market fund; 
and 

   (6) other categories of investors, at the discretion of the Board, as 
disclosed in the then current prospectus of the Fund. 

   No CDSC will be imposed on redemptions of shares purchased pursuant to 
paragraphs (1), (2) or (5), above. 

   For further information concerning purchases of the Fund's shares, contact 
DWR or another Selected Broker-Dealer or consult the Statement of Additional 
Information. 

CONTINGENT DEFERRED SALES CHARGE ALTERNATIVE--
CLASS B SHARES 

   Class B shares are sold at net asset value next determined without an 
initial sales charge so that 

                               16           
<PAGE>
the full amount of an investor's purchase payment may be immediately invested 
in the Fund. A CDSC, however, will be imposed on most Class B shares redeemed 
within six years after purchase. The CDSC will be imposed on any redemption 
of shares if after such redemption the aggregate current value of a Class B 
account with the Fund falls below the aggregate amount of the investor's 
purchase payments for Class B shares made during the six years (or, in the 
case of shares held by certain employer-sponsored benefit plans, three years) 
preceding the redemption. In addition, Class B shares are subject to an 
annual 12b-1 fee of 1.0% of the average daily net assets of Class B. 

   Except as noted below, Class B shares of the Fund which are held for six 
years or more after purchase (calculated from the last day of the month in 
which the shares were purchased) will not be subject to any CDSC upon 
redemption. Shares redeemed earlier than six years after purchase may, 
however, be subject to a CDSC which will be a percentage of the dollar amount 
of shares redeemed and will be assessed on an amount equal to the lesser of 
the current market value or the cost of the shares being redeemed. The size 
of this percentage will depend upon how long the shares have been held, as 
set forth in the following table: 

<TABLE>
<CAPTION>
         YEAR SINCE 
          PURCHASE            CDSC AS A PERCENTAGE 
        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>

   In the case of Class B shares of the Fund held by 401(k) plans or other 
employer-sponsored plans qualified under Section 401(a) of the Internal 
Revenue Code for which DWT serves as Trustee or the 401(k) Support Services 
Group of DWR serves as recordkeeper, shares held for three years or more 
after purchase (calculated as described in the paragraph above) will not be 
subject to any CDSC upon redemption. However, shares redeemed earlier than 
three years after purchase may be subject to a CDSC (calculated as described 
in the paragraph above), the percentage of which will depend on how long the 
shares have been held, as set forth in the following table: 

<TABLE>
<CAPTION>
         YEAR SINCE 
          PURCHASE            CDSC AS A PERCENTAGE 
        PAYMENT MADE           OF AMOUNT REDEEMED 
- -------------------------- ------------------------ 
<S>                        <C>
First .....................           2.0% 
Second ....................           2.0% 
Third .....................           1.0% 
Fourth and thereafter  ....           None 
</TABLE>

   CDSC Waivers. A CDSC will not be imposed on: (i) any amount which 
represents an increase in value of shares purchased within the six years (or, 
in the case of shares held by certain employer-sponsored benefit plans, three 
years) preceding the redemption; (ii) the current net asset value of shares 
purchased more than six years (or, in the case of shares held by certain 
employer-sponsored benefit plans, three years) prior to the redemption; and 
(iii) the current net asset value of shares purchased through reinvestment of 
dividends or distributions and/or shares acquired in exchange for shares of 
FSC Funds or of other Dean Witter Funds acquired in exchange for such shares. 
Moreover, in determining whether a CDSC is applicable it will be assumed that 
amounts described in (i), (ii) and (iii) above (in that order) are redeemed 
first. 

   In addition, the CDSC, if otherwise applicable, will be waived in the case 
of: 

   (1) redemptions of shares held at the time a shareholder dies or becomes 
disabled, only if the shares are:   (A) registered either in the name of an 
individual shareholder (not a trust), or in the names of such shareholder and 
his or her spouse as joint tenants with right of survivorship; or   (B) held 
in a qualified corporate or self-employed retirement plan, Individual 
Retirement Account ("IRA") or Custodial Account under Section 403(b)(7) of 
the Internal Revenue Code ("403(b) Custodial Account"), provided in either 
case that the redemption is requested within one year of the death or initial 
determination of disability; 

                               17           
<PAGE>
   (2) redemptions in connection with the following retirement plan 
distributions:   (A) lump-sum or other distributions from a qualified 
corporate or self-employed retirement plan following retirement (or, in the 
case of a "key employee" of a "top heavy" plan, following attainment of age 
59 1/2);   (B) distributions from an IRA or 403(b) Custodial Account following 
attainment of age 59 1/2; or (C) a tax-free return of an excess contribution 
to an IRA; and 

   (3) all redemptions of shares held for the benefit of a participant in a 
401(k) plan or other employer-sponsored plan qualified under Section 401(a) 
of the Internal Revenue Code which offers investment companies managed by the 
Investment Manager or its subsidiary, Dean Witter Services Company Inc., as 
self-directed investment alternatives and for which DWT serves as Trustee or 
the 401(k) Support Services Group of DWR serves as recordkeeper ("Eligible 
Plan"), provided that either: (A) the plan continues to be an Eligible Plan 
after the redemption; or (B) the redemption is in connection with the 
complete termination of the plan involving the distribution of all plan 
assets to participants. 

   With reference to (1) above, for the purpose of determining disability, 
the Distributor utilizes the definition of disability contained in Section 
72(m)(7) of the Internal Revenue Code, which relates to the inability to 
engage in gainful employment. With reference to (2) above, the term 
"distribution" does not encompass a direct transfer of IRA, 403(b) Custodial 
Account or retirement plan assets to a successor custodian or trustee. All 
waivers will be granted only following receipt by the Distributor of 
confirmation of the shareholder's entitlement. 

   Conversion to Class A Shares. Class B shares will convert automatically to 
Class A shares, based on the relative net asset values of the shares of the 
two Classes on the conversion date, which will be approximately ten (10) 
years after the date of the original purchase. The ten year period is 
calculated from the last day of the month in which the shares were purchased 
or, in the case of Class B shares acquired through an exchange or a series of 
exchanges, from the last day of the month in which the original Class B 
shares were purchased. The conversion will take place in the month following 
the tenth anniversary of the purchase. There will also be converted at that 
time such proportion of Class B shares acquired through automatic 
reinvestment of dividends and distributions owned by the shareholder as the 
total number of his or her Class B shares converting at the time bears to the 
total number of outstanding Class B shares purchased and owned by the 
shareholder. In the case of Class B shares held by a 401(k) plan or other 
employer-sponsored plan qualified under Section 401(a) of the Internal 
Revenue Code and for which DWT serves as Trustee or the 401(k) Support 
Services Group of DWR serves as recordkeeper, the plan is treated as a single 
investor and all Class B shares will convert to Class A shares on the 
conversion date of the first shares of a Dean Witter Multi-Class Fund 
purchased by that plan. In the case of Class B shares previously exchanged 
for shares of an "Exchange Fund" (see "Shareholder Services--Exchange 
Privilege"), the period of time the shares were held in the Exchange Fund 
(calculated from the last day of the month in which the Exchange Fund shares 
were acquired) is excluded from the holding period for conversion. If those 
shares are subsequently re-exchanged for Class B shares of a Dean Witter 
Multi-Class Fund, the holding period resumes on the last day of the month in 
which Class B shares are reacquired. 

   If a shareholder has received share certificates for Class B shares, such 
certificates must be delivered to the Transfer Agent at least one week prior 
to the date for conversion. Class B shares evidenced by share certificates 
that are not received by the Transfer Agent at least one week prior to any 
conversion date will be converted into Class A shares on the next scheduled 
conversion date after such certificates are received. 

   Effectiveness of the conversion feature is subject to the continuing 
availability of a ruling of the Internal Revenue Service or an opinion of 
counsel that (i) the conversion of shares does not constitute a taxable event 
under the Internal Revenue Code, (ii) Class A shares received on conversion 
will have a basis equal to the shareholder's basis in the 

                               18           
<PAGE>
converted Class B shares immediately prior to the conversion, and (iii) Class 
A shares received on conversion will have a holding period that includes the 
holding period of the converted Class B shares. The conversion feature may be 
suspended if the ruling or opinion is no longer available. In such event, 
Class B shares would continue to be subject to Class B 12b-1 fees. 

LEVEL LOAD ALTERNATIVE--CLASS C SHARES 

   Class C shares are sold at net asset value next determined without an 
initial sales charge but are subject to a CDSC of 1.0% on most redemptions 
made within one year after purchase (calculated from the last day of the 
month in which the shares were purchased). The CDSC will be assessed on an 
amount equal to the lesser of the current market value or the cost of the 
shares being redeemed. The CDSC will not be imposed in the circumstances set 
forth above in the section "Contingent Deferred Sales Charge 
Alternative--Class B Shares--CDSC Waivers," except that the references to six 
years in the first paragraph of that section shall mean one year in the case 
of Class C shares. Class C shares are subject to an annual 12b-1 fee of up to 
1.0% of the average daily net assets of the Class. Unlike Class B shares, 
Class C shares have no conversion feature and, accordingly, an investor that 
purchases Class C shares will be subject to 12b-1 fees applicable to Class C 
shares for an indefinite period subject to annual approval by the Fund's 
Board of Trustees and regulatory limitations. 

NO LOAD ALTERNATIVE--CLASS D SHARES 

   Class D shares are offered without any sales charge on purchase or 
redemption and without any 12b-1 fee. Class D shares are offered only to 
investors meeting an initial investment minimum of $5 million and the 
following categories of investors: (i) investors participating in the 
InterCapital mutual fund asset allocation program pursuant to which such 
persons pay an asset based fee; (ii) persons participating in a fee-based 
program approved by the Distributor, pursuant to which such persons pay an 
asset based fee for services in the nature of investment advisory or 
administrative services (subject to all of the terms and conditions of such 
programs referred to in (i) and (ii) above, which may include termination 
fees, mandatory redemption upon termination and such other circumstances as 
specified in the programs' agreements, and restrictions on transferability of 
Fund shares); (iii) 401(k) plans established by DWR and SPS Transaction 
Services, Inc. (an affiliate of DWR) for their employees; (iv) certain Unit 
Investment Trusts sponsored by DWR; (v) certain other open-end investment 
companies whose shares are distributed by the Distributor; and (vi) other 
categories of investors, at the discretion of the Board, as disclosed in the 
then current prospectus of the Fund. Investors who require a $5 million 
minimum initial investment to qualify to purchase Class D shares may satisfy 
that requirement by investing that amount in a single transaction in Class D 
shares of the Fund and other Dean Witter Multi-Class Funds, subject to the 
$1,000 minimum initial investment required for that Class of the Fund. In 
addition, for the purpose of meeting the $5 million minimum investment 
amount, holdings of Class A shares in all Dean Witter Multi-Class Funds, 
shares of FSC Funds and shares of Dean Witter Funds for which such shares 
have been exchanged, will be included together with the current investment 
amount. If a shareholder redeems Class A shares and purchases Class D shares, 
such redemption may be a taxable event. 

PLAN OF DISTRIBUTION 

   The Fund has adopted a Plan of Distribution pursuant to Rule 12b-1 under 
the Act with respect to the distribution of Class A, Class B and Class C 
shares of the Fund. In the case of Class A and Class C shares, the Plan 
provides that the Fund will reimburse the Distributor and others for the 
expenses of certain activities and services incurred by them specifically on 
behalf of those shares. Reimbursements for these expenses will be made in 
monthly payments by the Fund to the Distributor, which will in no event 
exceed amounts equal to payments at the annual rates of 0.25% of the average 
daily net assets of Class A and 1.0% of the average daily net assets of each 
of Class B and 

                               19           
<PAGE>
Class C. The fee is treated by the Fund as an expense in the year it is 
accrued. In the case of Class A shares, the entire amount of the fee 
currently represents a service fee within the meaning of the NASD guidelines. 
In the case of Class B and Class C shares, a portion of the fee payable 
pursuant to the Plan, equal to 0.25% of the average daily net assets of each 
of these Classes, is currently characterized as a service fee. A service fee 
is a payment made for personal service and/or the maintenance of shareholder 
accounts. 

   Additional amounts paid under the Plan in the case of Class B and Class C 
shares are paid to the Distributor for services provided and the expenses 
borne by the Distributor and others in the distribution of the shares of 
those Classes, including the payment of commissions for sales of the shares 
of those Classes and incentive compensation to and expenses of DWR's 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 in the case of Class B shares to compensate DWR and other Selected 
Broker-Dealers for their opportunity costs in advancing such amounts, which 
compensation would be in the form of a carrying charge on any unreimbursed 
expenses. 

   In the case of Class B shares, at any given time, the expenses in 
distributing Class B shares of the Fund may be in excess of the total of (i) 
the payments made by the Fund pursuant to the Plan, and (ii) the proceeds of 
CDSCs paid by investors upon the redemption of Class B shares. For example, 
if $1 million in expenses in distributing Class B shares of the Fund had been 
incurred and $750,000 had been received as described in (i) and (ii) above, 
the excess expense would amount to $250,000. Because there is no requirement 
under the Plan that the Distributor be reimbursed for all distribution 
expenses or any requirement that the Plan be continued from year to year, 
such excess amount does not constitute a liability of the Fund. Although 
there is no legal obligation for the Fund to 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 account executives at the 
time of sale may be reimbursed in the subsequent calendar year. No interest 
or other financing charges will be incurred on any Class A or Class C 
distribution expenses incurred by the Distributor under the Plan or on any 
unreimbursed expenses due to the Distributor pursuant to the Plan. 

DETERMINATION OF NET ASSET VALUE 

   The net asset value per share is determined once daily at 4:00 p.m., New 
York time, on each day that the New York Stock Exchange is open (or, on days 
when the New York Stock Exchange closes prior to 4:00 p.m., at such earlier 
time), by taking the net assets of the Fund, dividing by the number of shares 
outstanding and adjusting to the nearest cent. The assets belonging to the 
Class A, Class B, Class C and Class D shares will be invested together in a 
single portfolio. The net asset value of each Class, however, will be 
determined separately by subtracting each Class's accrued expenses and 
liabilities. The net asset value per share will not be determined on Good 
Friday and on such other federal and non-federal holidays as are observed by 
the New York Stock Exchange. 

                               20           
<PAGE>
   In the calculation of the Fund's net asset value: (1) an equity portfolio 
security listed or traded on the New York or American Stock Exchange or other 
stock exchange is valued at its latest sale price on that exchange 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); (2) all other 
portfolio securities for which over-the-counter market quotations are readily 
available are valued at the latest bid price; (3) when market quotations are 
not readily available, including circumstances 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 (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); (4) the value 
of short-term debt securities which mature at a date less than sixty days 
subsequent to valuation date will be determined on an amortized cost or 
amortized value basis; and (5) the value of other assets will be determined 
in good faith at fair value under procedures established by and under the 
general supervision of the Fund's Trustees. Dividends receivable are accrued 
as of the ex-dividend date. Interest income is accrued daily. Certain 
securities in the Fund's portfolio may be valued by an outside pricing 
service approved by the Fund's Trustees. 

SHAREHOLDER SERVICES 
- ----------------------------------------------------------------------------- 

   Automatic Investment of Dividends and Distributions. All income dividends 
and capital gains distributions are automatically paid in full and fractional 
shares of the applicable Class of the Fund (or, if specified by the 
shareholder, in shares of any other open-end Dean Witter Fund), unless the 
shareholder requests that they be paid in cash. Shares so acquired are 
acquired at net asset value and are not subject to the imposition of a 
front-end sales charge or a CDSC (see "Redemptions and Repurchases"). 

   Investment of Dividends or Distributions Received in Cash. Any shareholder 
who receives a cash payment representing a dividend or capital gains 
distribution may invest such dividend or distribution in shares of the 
applicable Class at the net asset value next determined after receipt by the 
Transfer Agent, by returning the check or the proceeds to the Transfer Agent 
within thirty days after the payment date. Shares so acquired are acquired at 
net asset value and are not subject to the imposition of a front-end sales 
charge or a CDSC (see "Redemptions and Repurchases"). 

   EasyInvest(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 or following 
redemption of shares of a Dean Witter money market fund, on a semi-monthly, 
monthly or quarterly basis, to the Transfer Agent for investment in shares of 
the Fund (see "Purchase of Fund Shares" and "Redemptions and 
Repurchases--Involuntary Redemption"). 

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

                               21           
<PAGE>
quarterly amount. Withdrawal plan payments should not be considered as 
dividends, yields or income. If periodic withdrawal plan payments 
continuously exceed net investment income and net capital gains, the 
shareholder's original investment will be correspondingly reduced and 
ultimately exhausted. Each withdrawal constitutes a redemption of shares and 
any gain or loss realized must be recognized for federal income tax purposes. 

   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 administration, custodial fees and 
other details, investors should contact their DWR or other Selected 
Broker-Dealer account executive or the Transfer Agent. 

EXCHANGE PRIVILEGE 

   Shares of each Class may be exchanged for shares of the same Class of any 
other Dean Witter Multi-Class Fund without the imposition of any exchange 
fee. Shares may also be exchanged for shares of the following funds: Dean 
Witter Short-Term U.S. Treasury Trust, Dean Witter Limited Term Municipal 
Trust, Dean Witter Short-Term Bond Fund, Dean Witter Intermediate Term U.S. 
Treasury Trust and five Dean Witter funds which are money market funds (the 
"Exchange Funds"). Class A shares may also be exchanged for shares of Dean 
Witter Multi-State Municipal Series Trust and Dean Witter Hawaii Municipal 
Trust, which are Dean Witter Funds sold with a front-end sales charge ("FSC 
Funds"). Class B shares may also be exchanged for shares of Dean Witter 
Global Short-Term Income Fund Inc., Dean Witter High Income Securities and 
Dean Witter National Municipal Trust, which are Dean Witter Funds offered 
with a CDSC ("CDSC 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 Dean Witter Multi-Class Fund, any FSC Fund, any 
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 day. Subsequent exchanges between any of the money market funds 
and any of the Dean Witter Multi-Class Funds, FSC Funds or CDSC Funds or any 
Exchange Fund that is not a money market fund can be effected on the same 
basis. 

   No CDSC is imposed at the time of any exchange of shares, although any 
applicable CDSC will be imposed upon ultimate redemption. During the period 
of time the shareholder remains invested in an Exchange Fund (calculated from 
the last day of the month in which the Exchange Fund shares were acquired) 
the holding period (for the purpose of determining the rate of the CDSC) is 
frozen. If those shares are subsequently re-exchanged for shares of a Dean 
Witter Multi-Class Fund or 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 Dean Witter Multi-Class Fund or shares of a 
CDSC Fund are reacquired. Thus, the CDSC is based upon the time (calculated 
as described above) the shareholder was invested in shares of a Dean Witter 
Multi-Class Fund or in shares of a CDSC Fund (see "Purchase of Fund Shares"). 
In the case of exchanges of Class A shares which are subject to a CDSC, the 
holding period also includes the time (calculated as described above) the 
shareholder was invested in shares of a FSC Fund. In the case of shares 
exchanged into an Exchange Fund on or 

                               22           
<PAGE>
after April 23, 1990, upon a redemption of shares which results in a CDSC 
being imposed, a credit (not to exceed the amount of the CDSC) will be given 
in an amount equal to the Exchange Fund 12b-1 distribution fees, if any, 
incurred on or after that date which are attributable to those shares. 
(Exchange Fund 12b-1 distribution fees are described in the prospectuses for 
those funds.) Class B shares of the Fund acquired in exchange for Class B 
shares of another Dean Witter Multi-Class Fund or shares of a CDSC Fund 
having a different CDSC schedule than that of this Fund will be subject to 
the higher CDSC schedule, even if such shares are subsequently re-exchanged 
for shares of the fund with the lower CDSC schedule. 

   Additional Information Regarding Exchanges. Purchases and exchanges should 
be made for investment purposes only. A pattern of frequent exchanges may be 
deemed by the Investment Manager to be abusive and contrary to the best 
interests of the Fund's other shareholders and, at the Investment Manager's 
discretion, may be limited by the Fund's refusal to accept additional 
purchases and/or exchanges from the investor. Although the Fund does not have 
any specific definition of what constitutes a pattern of frequent exchanges, 
and will consider all relevant factors in determining whether a particular 
situation is abusive and contrary to the best interests of the Fund and its 
other shareholders, investors should be aware that the Fund and each of the 
other 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 read it carefully 
before investing. Exchanges are subject to the minimum investment requirement 
of each Class of shares and any other conditions imposed by each fund. In the 
case of a shareholder holding a share certificate or certificates, no 
exchanges may be made until all applicable share certificates have been 
received by the Transfer Agent and deposited in the shareholder's account. An 
exchange will be treated for federal income tax purposes the same as a 
repurchase or redemption of shares on which the shareholder has realized 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 above 
Dean Witter Funds (for which the Exchange Privilege is available) pursuant to 
this Exchange Privilege by contacting their DWR or other Selected Dealer 
account executive (no Exchange Privilege Authorization Form is required). 
Other shareholders (and those 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 

                               23           
<PAGE>
or other Selected Broker-Dealer account number (if any). Telephone 
instructions may also be recorded. If such procedures are not employed, the 
Fund may be liable for any losses due to unauthorized or fraudulent 
instructions. 

   Telephone exchange instructions will be accepted if received by the 
Transfer Agent between 9:00 a.m. and 4:00 p.m., New York time, on any day the 
New York Stock Exchange is open. Any shareholder wishing to make an exchange 
who has previously filed an Exchange Privilege Authorization Form and who is 
unable to reach the Fund by telephone should contact his or her 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 
experience of the other Dean Witter Funds in the past. 

   For further information regarding the Exchange Privilege, shareholders 
should contact their account executive or the Transfer Agent. 

REDEMPTIONS AND REPURCHASES 
- ----------------------------------------------------------------------------- 

   Redemption. Shares of each Class of the Fund can be redeemed for cash at 
any time at the net asset value per share next determined less the amount of 
any applicable CDSC in the case of Class A, Class B or Class C shares (see 
"Purchase of Fund Shares"). If shares are held in a shareholder's account 
without a share certificate, a written request for redemption 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 documentation required by the Transfer Agent. 

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

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

   Payment for Shares Redeemed or Repurchased. Payment for shares presented 
for repurchase or redemption will be made by check within seven days after 
receipt by the Transfer Agent of the certificate and/or written request in 
good order. 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 executive regarding restrictions on redemption of shares of the Fund 
pledged in the margin account. 

   Reinstatement Privilege. A shareholder who has had his or her shares 
redeemed or repurchased and has not previously exercised this reinstatement 
privilege may, within 35 days after the date of the redemption or repurchase, 
reinstate any portion or all of the proceeds of such redemption or repur- 

                               24           
<PAGE>
chase in shares of the Fund in the same Class from which such shares were 
redeemed or repurchased, at the net asset value next determined after a 
reinstatement request, together with the proceeds, is received by the 
Transfer Agent and receive a pro rata credit for any CDSC paid in connection 
with such redemption or repurchase. 

   Involuntary Redemption. The Fund reserves the right to redeem, upon sixty 
days' notice and at net asset value, the shares of any shareholder (other 
than shares held in an Individual Retirement Account or Custodial Account 
under Section 403(b)(7) of the Internal Revenue Code) whose shares due to 
redemptions by the shareholder have a value of less than $100 or such lesser 
amount as may be fixed by the Board of Trustees or, in the case of an account 
opened through EasyInvest, if after twelve months the shareholder has 
invested less than $1,000 in the account. However, before the Fund redeems 
such shares and sends the proceeds to the shareholder, it will notify the 
shareholder that the value of the shares is less than the applicable amount 
and allow the shareholder to make an additional investment in an amount which 
will increase the value of the account to at least the applicable amount 
before the redemption is processed. No CDSC will be imposed on any 
involuntary redemption. 

DIVIDENDS, DISTRIBUTIONS AND TAXES 
- ----------------------------------------------------------------------------- 

   Dividends and Distributions. The Fund declares dividends separately for 
each Class of shares and intends to distribute substantially all of the 
Fund's net investment income and net realized short-term and long-term 
capital gains, if there are any, at least once each year. The Fund may, 
however, determine either to distribute or to retain all or part of any net 
long-term capital gains in any year for reinvestment. 

   All dividends and any capital gains distributions will be paid in 
additional shares of the same Class and automatically credited to the 
shareholder's account without issuance of a share certificate unless the 
shareholder requests in writing that all dividends be paid in cash. Shares 
acquired by dividend and distribution reinvestments will not be subject to 
any front-end sales charge or CDSC. Class B shares acquired through dividend 
and distribution reinvestments will become eligible for conversion to Class A 
shares on a pro rata basis. Distributions paid on Class A and Class D shares 
will be higher than for Class B and Class C shares because distribution fees 
paid by Class B and Class C shares are higher. (See "Shareholder 
Services--Automatic Investment of Dividends and Distributions.") 

   Taxes. Because the Fund intends to distribute all of its net investment 
income and net short-term capital gains to shareholders and otherwise 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 the dividends and distributions they receive from the Fund. 
Such dividends and distributions, to the extent that they are derived from 
net investment income or short-term capital gains, are taxable to the 
shareholder as ordinary dividend income regardless of whether the shareholder 
receives such distributions in additional shares or in cash. Any dividends 
declared in the last quarter of any calendar year which are paid in the 
following year prior to February 1 will be deemed, for tax purposes, to have 
been received by the shareholder in the prior year. 

   One of the requirements for the Fund to remain qualified as a regulated 
investment company is that less than 30% of the Fund's gross income be 
derived from gains from the sale or other disposition of securities held for 
less than three months. Accordingly, the Fund may be restricted in its 
ability to engage in transactions involving futures contracts. 

   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 distribu- 

                               25           
<PAGE>
tion is received in additional shares or in cash. Capital gains distributions 
are not eligible for the dividends received deduction. 

   The Fund may at times make payments from sources other than income or net 
capital gains. Payments from such sources will, in effect, represent a return 
of a portion of each shareholder's investment. All, or a portion, of such 
payments will not be taxable to shareholders. 

   After the end of the calendar year, shareholders will be sent full 
information on their dividends and capital gains distributions for tax 
purposes, including information as to the portion taxable as ordinary income, 
the portion taxable as long-term capital gains, and the amount of dividends 
eligible for the Federal dividends received deduction available to 
corporations. To avoid being subject to a 31% federal backup withholding tax 
on taxable dividends, capital gains distributions and the proceeds of 
redemptions and repurchases, shareholders' taxpayer identification numbers 
must be furnished and certified as to their accuracy. 

   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. These figures are computed separately for Class A, 
Class B, Class C and Class D shares. The total return of the Fund is based on 
historical earnings and is not intended to indicate future performance. The 
"average annual total return" of the Fund refers to a figure reflecting the 
average annualized percentage increase (or decrease) in the value of an 
initial investment in a Class of the Fund of $1,000 over periods of one, five 
and ten years, or over the life of the Fund, if less than any of the 
foregoing. Total return and average annual total return reflect all income 
earned by the Fund, any appreciation or depreciation of the Fund's assets and 
all expenses incurred by the applicable Class and all sales charges which 
will be incurred by shareholders, for the stated periods. It also assumes 
reinvestment of all dividends and distributions paid by the Fund. 

   In addition to the foregoing, the Fund may advertise its total return for 
each Class over different periods of time by means of aggregate, average, 
year-by-year or other types of total return figures. Such calculations may or 
may not reflect the deduction of any 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 each Class of 
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 except 
that each Class will have exclusive voting privileges with respect to matters 
relating to distribution expenses borne solely by such Class or any other 
matter in which the interests of one Class differ from the interests of any 
other Class. In addition, Class B shareholders will have the right to vote on 
any proposed material increase in Class A's expenses, if such proposal is 
submitted separately to Class A shareholders. Also, as discussed herein, 
Class A, Class B and Class C bear the expenses related to the distribution of 
their respective shares. 

   The Fund is not required to hold Annual Meetings of Shareholders and in 
ordinary circumstances 

                               26           
<PAGE>
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 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. 

   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 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 options transactions and profiting on 
short-term trading (that is, a purchase within sixty days of a sale or a sale 
within sixty days of a purchase) of a security. In addition, investment 
personnel may not purchase or sell a security for their personal account 
within thirty days before or after any transaction in any Dean Witter Fund 
managed by them. Any violations of the Code of Ethics are subject to 
sanctions, including reprimand, demotion or suspension or termination of 
employment. The Code of Ethics comports with regulatory requirements and the 
recommendations in the 1994 report by the Investment Company Institute 
Advisory Group on Personal Investing. 

   Master/Feeder Conversion.  The Fund reserves the right to seek to achieve 
its investment objective by investing all of its investable assets in a 
diversified, open-end management investment company having the same 
investment objective and policies and substantially the same investment 
restrictions as those applicable to the Fund. 

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

   InterCapital provided the initial capital for the Fund by purchasing 2,500 
shares of each Class of the Fund for $100,000 on July 28, 1997. As of the 
date of this Prospectus, InterCapital owned 100% of the outstanding shares of 
the Fund. InterCapital may be deemed to control the Fund until such time as 
it owns less that 25% of the outstanding shares of the Fund. 

                               27           
<PAGE>
Dean Witter 
S&P 500 Index Fund 
Two World Trade Center 
New York, New York 10048 

TRUSTEES 

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

OFFICERS 

Charles A. Fiumefreddo 
Chairman and Chief Executive Officer 

Barry Fink 
Vice President, Secretary and 
General Counsel 

Kenton J. Hinchliffe 
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 FSB 
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. 

DEAN WITTER 
S&P 500 INDEX 
FUND 





PROSPECTUS--AUGUST 6, 1997 






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