WITTER DEAN S&P 500 INDEX FUND
497, 1998-04-07
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<PAGE>
                                                 Filed Pursuant to Rule 497(c)
                                              Registration File No.: 333-29721

PROSPECTUS -- MARCH 31, 1998 
- ------------------------------------------------------------------------------ 

     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 "Investment Objective and Policies.") 

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

     This Prospectus sets forth concisely the information you should know
before investing in the Fund. It should be read and retained for future
reference. Additional information about the Fund is contained in the Statement
of Additional Information, dated March 31, 1998, which has been filed with the 
Securities and Exchange Commission, and which is available at no charge upon 
request of the Fund at the address or telephone numbers listed on this page. 
The Statement of Additional Information is incorporated herein by reference. 

   
DEAN WITTER DISTRIBUTORS INC. 
DISTRIBUTOR 
TABLE OF CONTENTS 
    

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

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

Financial Highlights ..................................................      6 

The Fund and its Management ...........................................      7 

Investment Objective and Policies .....................................      7 

 Risk Considerations and 
  Investment Practices ................................................      9 

Investment Restrictions ...............................................     12 

Purchase of Fund Shares ...............................................     12 

Shareholder Services ..................................................     22 

Redemptions and Repurchases ...........................................     25 

Dividends, Distributions and Taxes ....................................     26 

Performance Information ...............................................     27 

Additional Information ................................................     28 

Financial Statements (unaudited)-- 
 February 28, 1998 ....................................................     30 
    

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

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

       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) 
    


<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 28). 
                     The Fund offers four Classes of shares, each with a different 
                     combination of sales charges, ongoing fees and other features (see 
                     pages 12-22). 
- -------------------  ------------------------------------------------------------------ 
Minimum Purchase     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 ($25 
                     million for certain qualified plans) or more and to certain other 
                     limited categories of investors. For the purpose of meeting the 
                     minimum $5 million (or $25 million) investment for Class D shares, 
                     and subject to the $1,000 minimum initial investment for each 
                     Class of the Fund, an investor's existing holdings of Class A 
                     shares and shares of funds for which 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 12). 
- -------------------  ------------------------------------------------------------------ 
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 7). 
- -------------------  ------------------------------------------------------------------ 
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 101 investment companies and 
                     other portfolios with net assets under management of approximately 
                     $110 billion at February 28, 1998 (see page 7). 
- -------------------  ------------------------------------------------------------------ 
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 7). 
- -------------------  ------------------------------------------------------------------ 
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 12 and 
                     20). 
- -------------------  ------------------------------------------------------------------ 
Alternative          Four classes of shares are offered: o Class A shares are offered 
Purchase             with a front-end sales charge, starting at 5.25% and reduced for 
Arrangements         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 12, 15 and 20). 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 12, 18 and 20).
- --------------------------------------------------------------------------------------- 
</TABLE>
    

                                2           
<PAGE>

   
<TABLE>
<CAPTION>
<S>                  <C>
 ------------------- ------------------------------------------------------------------ 
                     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 12 and 20). o Class D shares are offered only to 
                     investors meeting an initial investment minimum of $5 million ($25 
                     million for certain qualified plans) and to certain other limited 
                     categories of investors. Class D shares are offered without a 
                     front-end sales charge or CDSC and are not subject to any 12b-1 
                     fee (see pages 12 and 20). 
- -------------------  ------------------------------------------------------------------ 
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 22 and 26). 
- -------------------  ------------------------------------------------------------------ 
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 25). 
- -------------------  ------------------------------------------------------------------ 
Risk Considerations  An investment in the Fund should be considered a long-term holding 
                     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 
                     9) 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 August 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+ ...................................     0.23%         0.23%        0.23%        0.23% 
12b-1 Fees (5)(6)...................................     0.24%         1.00%        1.00%        None 
Other Expenses+ ....................................     0.27%         0.27%        0.27%        0.27% 
Total Fund Operating Expenses+......................     0.74%         1.50%        1.50%        0.50% 
</TABLE>

   
- ------------ 
+      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 Investment 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 reflect the 
       assumption of such 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. 

                                5           



<PAGE>

FINANCIAL HIGHLIGHTS (unaudited) 
- ------------------------------------------------------------------------------
The following ratios and per share data for a share of beneficial interest 
outstanding throughout the period have been taken from the records of the 
Fund without examination by the independent accountants. The financial 
highlights should be read in conjunction with the unaudited financial 
statements and the notes thereto which are contained in this Prospectus 
commencing on page 30. 

<TABLE>
<CAPTION>
                                                   For the Period September 26, 1997* Through February 28, 1998++ 
- --------------------------------------------------------------------------------------------------------------------------
                                                 Class A        Class B          Class C           Class D 
                                                 Shares          Shares           Shares            Shares
                                                 -------        -------          --------          --------
<S>                                             <C>             <C>              <C>               <C>
PER SHARE OPERATING PERFORMANCE: 
Net asset value, beginning of period..........   $10.00          $10.00          $10.00            $10.00 
                                                 -------        -------          --------          --------
Net investment income.........................     0.05            0.02            0.02              0.06 
Net realized and unrealized gain..............     1.10            1.09            1.09              1.09
                                                 -------        -------          --------          --------
Total from investment operations .............     1.15            1.11            1.11              1.15 
                                                 -------        -------          --------          --------
Less dividends from net investment income.....    (0.03)          (0.01)          (0.01)            (0.03)
                                                 -------        -------          --------          --------
Net asset value, end of period................   $11.12          $11.10          $11.10            $11.12 
                                                 =======        =======          ========          ========

TOTAL INVESTMENT RETURN+(1) ..................    11.47%          11.09%          11.08%            11.53% 

RATIOS TO AVERAGE NET ASSETS(2)(3): 
Expenses .....................................     0.74%           1.50%           1.50%             0.50% 
Net investment income.........................     1.10%           0.36%           0.37%             1.29% 

SUPPLEMENTAL DATA: 
Net assets, end of period, in thousands.......  $19,089        $380,009         $24,126           $12,705 
Portfolio turnover rate(1)....................        1%              1%              1%                1% 
Average commission rate paid..................  $0.0157         $0.0157         $0.0157           $0.0157 
</TABLE>

- ------------ 
 *      Commencement of operations. 
 
++      The per share amounts were computed using an average number of shares 
        outstanding during the period. 

 +      Does not reflect the deduction of sales charge. Calculated based on 
        the net asset value as of the last business day of the period. 

(1)     Not annualized. 

(2)     Annualized. 

(3)     If the Fund had borne all of its expenses that were reimbursed or 
        waived by the Investment Manager, the annualized expense and net 
        investment income ratios would have been 0.91% and 0.93%, 
        respectively, for Class A shares, 1.67% and 0.19%, respectively, for 
        Class B shares, 1.67% and 0.20%, respectively, for Class C shares and 
        0.67% and 1.12%, respectively, for Class D shares. 

                      See Notes to Financial Statements 

                                6           





<PAGE>
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 & 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 101 investment companies, 28 of which are listed 
on the New York Stock Exchange, with combined assets of approximately $106 
billion at February 28, 1998. The Investment Manager also manages portfolios 
of pension plans, other institutions and individuals which aggregated 
approximately $4 billion at such date. 
    

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

   The Fund's 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 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; certain legal fees, and printing 
and other expenses relating to the Fund's operations which are not expressly 
assumed by the Investment Manager under its Investment Management Agreement 
with the Fund. 

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

   The investment objective of the Fund is 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 weight- 

                                7           
<PAGE>
ings 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 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. 

                                8           
<PAGE>
   
   The Fund may also invest in Standard & Poor's Depositary Receipts, 
repurchase agreements and 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. 

   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. 

                                9           
<PAGE>
   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 
proportionate to those paid by the portfolio of stocks that comprise the S&P 
500 Index. The Fund may invest up to 10% of its total assets in the aggregate 
in SPDRs and up to 5% of its total assets in SPDRs issued by a single unit 
investment trust. As a holder of interests in a unit investment trust, the 
Fund would indirectly bear its ratable share of that unit investment trust's 
expenses. At the same time the Fund would continue to pay its own management 
and advisory fees and other expenses, as a result of which the Fund and its 
shareholders in effect will be absorbing duplicate levels of fees with 
respect to investments in such unit investment trusts. The liquidity of small 
holdings of SPDRs will depend upon the existence and liquidity of a secondary 
market. 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 
fluctuationsduring 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 

                               10           
<PAGE>
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. 

   Year 2000. The investment management services provided to the Fund by the 
Investment Manager and the services provided to shareholders by the 
Distributor and the Transfer Agent depend on the smooth functioning of their 
computer systems. Many computer software systems in use today cannot 
recognize the year 2000, but revert to 1900 or some other date, due to the 
manner in which dates were encoded and calculated. That failure could have a 
negative impact on the handling of securities trades, pricing and account 
services. The Investment Manager, the Distributor and the Transfer Agent have 
been actively working on necessary changes to their own computer systems to 
prepare for the year 2000 and expect that their systems will be adapted 
before that date, but there can be no assurance that they will be successful, 
or that interaction with other non-complying computer systems will not impair 
their services at that time. 

   
   In addition, it is possible that the markets for securities in which the 
Fund invests may be detrimentally affected by computer failures throughout 
the financial services industry beginning January 1, 2000. Improperly 
functioning trading systems may result in settlement problems and liquidity 
issues. In addition, corporate and governmental data processing errors may 
result in production problems for individual companies and overall economic 
uncertainties. Earnings of individual issuers will be affected by remediation 
costs, which may be substantial and may be reported inconsistently in U.S. 
and foreign financial statements. Accordingly, the Fund's investments may be 
adversely affected. 
    

PORTFOLIO MANAGEMENT 

   
   The Fund's portfolio is 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 26 equity funds and fund 
portfolios with approximately $9 billion in assets as of February 28, 1998. 
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. 

   Orders for transactions in portfolio securities and commodities are placed 
for the Fund with a number of brokers and dealers, including Dean Witter 
Reynolds Inc. ("DWR"), Morgan Stanley & Co. Incorporated and other 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 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 
    

                               11           
<PAGE>
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. 

PURCHASE OF FUND SHARES 
- ----------------------------------------------------------------------------- 

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 plans are subject to a CDSC scaled down from 2.0% to 1.0% 
if redeemed within three years after purchase.) Class C shares are sold 
without an initial sales charge but are subject to a CDSC of 1.0% on most 
redemptions made within one year after purchase. Class D shares are sold 
without an initial sales charge or CDSC and are available only to investors 
meeting an initial investment minimum of $5 million ($25 million for certain 
qualified plans), and to certain other limited categories of investors. 

                               12           
<PAGE>
At the discretion of the Board of Trustees of the Fund, Class A shares may be 
sold to categories of investors in addition to those set forth in this 
prospectus at net asset value without a front-end sales charge, and Class D 
shares may be sold to certain other categories of investors, in each case as 
may be described in the then current prospectus of the Fund. See "Alternative 
Purchase Arrangements--Selecting a Particular Class" for a discussion of 
factors to consider in selecting which Class of shares to purchase. 

   The minimum initial purchase is $1,000 for each Class of shares, although 
Class D shares are only available to persons investing $5 million ($25 
million for certain qualified plans) or more and to certain other limited 
categories of investors. For the purpose of meeting the minimum $5 million 
(or $25 million) initial investment for Class D shares, and subject to the 
$1,000 minimum initial investment for each Class of the Fund, an investor's 
existing holdings of Class A shares of the Fund and other 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 Morgan Stanley Dean Witter Trust FSB (the "Transfer Agent" or 
"MSDW Trust") 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. The 
minimum initial purchase in the case of an "Education IRA" is $500, if the 
Distributor has reason to believe that additional investments will increase 
the investment in the account to $1,000 within three years. In the case of 
investments pursuant to (i) Systematic Payroll Deduction Plans (including 
Individual Retirement Plans), (ii) the InterCapital mutual fund asset 
allocation program and (iii) fee-based programs approved by the Distributor, 
pursuant to which participants pay an asset based fee for services in the 
nature of investment advisory, administrative and/or brokerage services, the 
Fund, in its discretion, may accept investments without regard to any minimum 
amounts which would otherwise be required, provided, in the case of 
Systematic Payroll Deduction Plans, that the Distributor has reason to 
believe that additional investments will increase the investment in all 
accounts under such Plans to at least $1,000. Certificates for shares 
purchased will not be issued unless a request is made by the shareholder in 
writing to the Transfer Agent. 

   Shares of the Fund are sold through the Distributor on a normal three 
business day settlement basis; that is, payment is due on the third business 
day (settlement date) after the order is placed with the Distributor. 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 flexibil- 

                               13           
<PAGE>
ity of selecting an investment best suited to their needs. The general public 
is offered three Classes of shares: Class A shares, Class B shares and Class 
C shares, which differ principally in terms of sales charges and rate of 
expenses to which they are subject. A fourth Class of shares, Class D shares, 
is offered only to limited categories of investors (see "No Load 
Alternative--Class D Shares" below). 

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

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

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

   Class B Shares. Class B shares are offered at net asset value with no 
initial sales charge but are subject to a CDSC (scaled down from 5.0% to 
1.0%) if redeemed within six years of purchase. (Class B shares purchased by 
certain qualified plans are subject to a CDSC scaled down from 2.0% to 1.0% 
if redeemed within three years after purchase.) This CDSC may be waived for 
certain redemptions. Class B shares are also subject to an annual 12b-1 fee 
of 1.0% of the 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: 

                               14           
<PAGE>
   The decision as to which Class of shares is more beneficial to an investor 
depends on the amount and intended length of his or her investment. Investors 
who prefer an initial sales charge alternative may elect to purchase Class A 
shares. Investors qualifying for significantly reduced or, in the case of 
purchases of $1 million or more, no initial sales charges may find Class A 
shares particularly attractive because similar sales charge reductions are 
not available with respect to Class B or Class C shares. Moreover, Class A 
shares are subject to lower ongoing expenses than are Class B or Class C 
shares over the term of the investment. As an alternative, Class B and Class 
C shares are sold without any initial sales charge so the entire purchase 
price is immediately invested in the Fund. Any investment return on these 
additional investment amounts may partially or wholly offset the higher 
annual expenses of these Classes. Because the Fund's future return cannot be 
predicted, however, there can be no assurance that this would be the case. 

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

   For the purpose of meeting the $5 million (or $25 million) minimum 
investment amount for Class D shares, holdings of Class A shares in all 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                                     1.0%             B shares convert 
              Maximum 5.0%                                  to A shares 
              CDSC during the first                         automatically after 
              year decreasing                               approximately 
              to 0 after six years                          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 

                               15           
<PAGE>
specific circumstances. The CDSC will be assessed on an amount equal to the 
lesser of the current market value or the cost of the shares being redeemed. 
The CDSC will not be imposed (i) in the circumstances set forth below in the 
section "Contingent Deferred Sales Charge Alternative--Class B Shares--CDSC 
Waivers," except that the references to six years in the first paragraph of 
that section shall mean one year in the case of Class A shares, and (ii) in 
the circumstances identified in the section "Additional Net Asset Value 
Purchase Options" below. Class A shares are also subject to an annual 12b-1 
fee of up to 0.25% of the average daily net assets of the Class. 

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

<TABLE>
<CAPTION>
                                SALES CHARGE 
                      -------------------------------- 
                       PERCENTAGE OF     APPROXIMATE 
  AMOUNT OF 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 

                               16           
<PAGE>
investor has a cumulative net asset value of shares of FSC Funds and Class A 
and Class D shares that, together with the current investment amount, is 
equal to at least $5 million ($25 million for certain qualified plans), such 
investor is eligible to purchase Class D shares subject to the $1,000 minimum 
initial investment requirement of that Class of the Fund. See "No Load 
Alternative--Class D Shares" below. 

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

   Letter of Intent. The foregoing schedule of reduced sales charges will 
also be available to investors who enter into a written Letter of Intent 
providing for the purchase, within a thirteen-month period, of Class A shares 
of the Fund from DWR or other Selected Broker-Dealers. The cost of Class A 
shares of the Fund or shares of other 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 MSDW Trust (an affiliate of the Investment Manager) 
provides discretionary trustee services; 

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

   (3) employer-sponsored 401(k) and other plans qualified under Section 
401(a) of the Internal Revenue Code ("Qualified Retirement Plans") with at 
least 200 eligible employees and for which MSDW Trust serves as Trustee or 
DWR's Retirement Plan Services serves as recordkeeper pursuant to a written 
Recordkeeping Services Agreement; 

   (4) Qualified Retirement Plans for which MSDW Trust serves as Trustee or 
DWR's Retirement Plan Services serves as recordkeeper pursuant to a written 
Recordkeeping Services Agreement whose Class B shares have converted to Class 
A shares, regardless of the plan's asset size or number of eligible 
employees; 

   (5) investors who are clients of a 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. 

                               17           
<PAGE>
   For further information concerning purchases of the Fund's shares, contact 
DWR or another Selected Broker-Dealer or consult the Statement of Additional 
Information. 

CONTINGENT DEFERRED SALES CHARGE ALTERNATIVE--CLASS B SHARES 

   Class B shares are sold at net asset value next determined without an 
initial sales charge so that the full amount of an investor's purchase 
payment may be immediately invested in the Fund. A CDSC, however, will be 
imposed on most Class B shares redeemed within six years after purchase. The 
CDSC will be imposed on any redemption of shares if after such redemption the 
aggregate current value of a Class B account with the Fund falls below the 
aggregate amount of the investor's purchase payments for Class B shares made 
during the six years (or, in the case of shares held by certain Qualified 
Retirement Plans, three years) preceding the redemption. In addition, Class B 
shares are subject to an annual 12b-1 fee of 1.0% of the 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 purchased by Qualified 
Retirement Plans for which MSDW Trust serves as Trustee or DWR's Retirement 
Plan Services serves as recordkeeper pursuant to a written Recordkeeping 
Services Agreement, shares held for three years or more after purchase 
(calculated as described in the paragraph above) will not be subject to any 
CDSC upon redemption. However, shares redeemed earlier than three years after 
purchase may be subject to a CDSC (calculated as described in the paragraph 
above), the percentage of which will depend on how long the shares have been 
held, as set forth in the following table: 

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

   CDSC Waivers. A CDSC will not be imposed on: (i) any amount which 
represents an increase in value of shares purchased within the six years (or, 
in the case of shares held by certain Qualified Retirement Plans, three 
years) preceding the redemption; (ii) the current net asset value of shares 
purchased more than six years (or, in the case of shares held by certain 
Qualified Retirement Plans, three years) prior to the redemption; and (iii) 
the current net asset value of shares purchased through reinvestment of 
dividends or distributions and/or shares acquired in exchange for shares of 
FSC Funds or of other Dean Witter Funds acquired in exchange for such shares. 
Moreover, in determining whether a CDSC is appli-cable 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 

                               18           
<PAGE>
of such shareholder and his or her spouse as joint tenants with right of 
survivorship; or   (B) held in a qualified corporate or self-employed 
retirement plan, Individual Retirement Account ("IRA") or Custodial Account 
under Section 403(b)(7) of the Internal Revenue Code ("403(b) Custodial 
Account"), provided in either case that the redemption is requested within 
one year of the death or initial determination of disability; 

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

   (3) all redemptions of shares held for the benefit of a participant in a 
Qualified Retirement Plan which offers investment companies managed by the 
Investment Manager or its subsidiary, Dean Witter Services Company Inc., as 
self-directed investment alternatives and for which MSDW Trust serves as 
Trustee or DWR's Retirement Plan Services serves as recordkeeper pursuant to 
a written Recordkeeping Services Agreement ("Eligible Plan"), provided that 
either: (A) the plan continues to be an Eligible Plan after the redemption; 
or (B) the redemption is in connection with the complete termination of the 
plan involving the distribution of all plan assets to participants. 

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

   Conversion to Class A Shares. Class B shares will convert automatically to 
Class A shares, based on the relative net asset values of the shares of the 
two Classes on the conversion date, which will be approximately ten (10) 
years after the date of the original purchase. The ten year period is 
calculated from the last day of the month in which the shares were purchased 
or, in the case of Class B shares acquired through an exchange or a series of 
exchanges, from the last day of the month in which the original Class B 
shares were purchased, provided that shares acquired in exchange for shares 
of another fund originally purchased before May 1, 1997 will convert to Class 
A shares in May, 2007. The conversion of shares purchased on or after May 1, 
1997 will take place in the month following the tenth anniversary of the 
purchase. There will also be converted at that time such proportion of Class 
B shares acquired through automatic reinvestment of dividends and 
distributions owned by the shareholder as the total number of his or her 
Class B shares converting at the time bears to the total number of 
outstanding Class B shares purchased and owned by the shareholder. In the 
case of Class B shares held by a Qualified Retirement Plan for which MSDW 
Trust serves as Trustee or DWR's Retirement Plan Services serves as 
recordkeeper pursuant to a written Recordkeeping Services Agreement, the plan 
is treated as a single investor and all Class B shares will convert to Class 
A shares on the conversion date of the first shares of a 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 

                               19           
<PAGE>
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 converted Class B 
shares immediately prior to the conversion, and (iii) Class A shares received 
on conversion will have a holding period that includes the holding period of 
the converted Class B shares. The conversion feature may be suspended if the 
ruling or opinion is no longer available. In such event, Class B shares would 
continue to be subject to Class B 12b-1 fees. 

LEVEL LOAD ALTERNATIVE--CLASS C SHARES 

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

NO LOAD ALTERNATIVE--CLASS D SHARES 

   Class D shares are offered without any sales charge on purchase or 
redemption and without any 12b-1 fee. Class D shares are offered only to 
investors meeting an initial investment minimum of $5 million ($25 million 
for Qualified Retirement Plans for which MSDW Trust serves as Trustee or 
DWR's Retirement Plan Services serves as recordkeeper pursuant to a written 
Recordkeeping Services Agreement) and the following categories of investors: 
(i) investors participating in the 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, administrative and/or brokerage services (subject to all 
of the terms and conditions of such programs referred to in (i) and (ii) 
above, which may include termination fees, mandatory redemption upon 
termination and such other circumstances as specified in the programs' 
agreements, and restrictions on transferability of Fund shares); (iii) 401(k) 
plans established by DWR and SPS Transaction Services, Inc. (an affiliate of 
DWR) for their employees; (iv) certain Unit Investment Trusts sponsored by 
DWR; (v) certain other open-end investment companies whose shares are 
distributed by the Distributor; and (vi) other categories of investors, at 
the discretion of the Board, as disclosed in the then current prospectus of 
the Fund. Investors who require a $5 million (or $25 million) minimum initial 
investment to qualify to purchase Class D shares may satisfy that requirement 
by investing that amount in a single transaction in Class D shares of the 
Fund and other Dean Witter Multi-Class Funds, subject to the $1,000 minimum 
initial investment required for that Class of the Fund. In addition, for the 
purpose of meeting the $5 million (or $25 million) minimum investment amount, 
holdings of Class A shares in all 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 

                               20           
<PAGE>
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% and 1.0% of the average daily net 
assets of Class A and Class C, respectively. In the case of Class B shares, 
the Plan provides that the Fund will pay the Distributor a fee, which is 
accrued daily and paid monthly, at the annual rate of 1.0% of the average 
daily net assets of Class B. The fee is treated by the Fund as an expense in 
the year it is accrued. In the case of Class A shares, the entire amount of 
the fee currently represents a service fee within the meaning of the NASD 
guidelines. In the case of Class B and Class C shares, a portion of the fee 
payable pursuant to the Plan, equal to 0.25% of the average daily net assets 
of each of these Classes, is currently characterized as a service fee. A 
service fee is a payment made for personal service and/or the maintenance of 
shareholder accounts. 

   Additional amounts paid under the Plan in the case of Class B and Class C 
shares are paid to the Distributor for services provided and the expenses 
borne by the Distributor and others in the distribution of the shares of 
those Classes, including the payment of commissions for sales of the shares 
of those Classes and incentive compensation to and expenses of 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. 

   
   For the fiscal period September 26, 1997 (commencement of operations) 
through February 28, 1998, Class A, Class B and Class C shares of the Fund 
accrued payments under the Plan amounting to $12,848, $1,127,620, and 
$75,709, respectively, which amounts on an annualized basis are equal to 
0.24%, 1.0% and 1.0% of the average daily net assets of Class A, Class B and 
Class C, respectively, for such period. 
    

   In the case of Class B shares, at any given time, the expenses in 
distributing Class B shares of the Fund may be in excess of the total of (i) 
the payments made by the Fund pursuant to the Plan, and (ii) the proceeds of 
CDSCs paid by investors upon the redemption of Class B shares. For example, 
if $1 million in expenses in distributing Class B shares of the Fund had been 
incurred and $750,000 had been received as described in (i) and (ii) above, 
the excess expense would amount to $250,000. The Distributor has advised the 
Fund that such excess amounts, including the carrying charge described above, 
totalled $15,470,964 at February 28, 1998, which was equal to 4.07% of the 
net assets of Class B on such date. Because there is no requirement under the 
Plan that the Distributor be reimbursed for all distribution expenses or any 
requirement that the Plan be continued from year to year, this excess amount 
does not constitute a liability of the Fund. Although there is no legal 
obligation for the Fund to pay expenses incurred in excess of payments made 
to the Distributor under the Plan, and the proceeds of CDSCs paid by 
investors upon redemption of shares, if for any reason the Plan is terminated 
the Trustees will consider at that time the manner in which to treat such 
expenses. Any cumulative expenses incurred, but not yet recovered through 
distribution fees or CDSCs, may or may not be recovered through future 
distribution fees or CDSCs. 

   In the case of Class A and Class C shares, expenses incurred pursuant to 
the Plan in any 

                               21           
<PAGE>
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. The Distributor has advised the 
Fund that unreimbursed expenses representing a gross sales commission 
credited to account executives at the time of sale totalled $145,457 in the 
case of Class C at December 31, 1997, which amount was equal to 0.76% of the 
net assets of Class C on such date, and that there were no such expenses that 
may be reimbursed in the subsequent year in the case of Class A on such date. 
No interest or other financing charges will be incurred on any Class A or 
Class C distribution expenses incurred by the Distributor under the Plan or 
on any unreimbursed expenses due to the Distributor pursuant to the Plan. 

DETERMINATION OF NET ASSET VALUE 

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

   In the calculation of the Fund's net asset value: (1) an equity portfolio 
security listed or traded on the New York or American Stock Exchange or other 
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"). 

                               22           
<PAGE>
   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 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. ("Global Short-Term") which is a Dean 
Witter Fund offered with a CDSC. Exchanges may be made after the shares of 
the Fund acquired by purchase (not by exchange or dividend reinvestment) have 
been held for thirty days. There is no waiting period for exchanges of shares 
acquired by exchange or dividend reinvestment. 

   An exchange to another Dean Witter Multi-Class Fund, any FSC Fund, Global 
Short-Term or 

                               23           
<PAGE>
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, Global Short-Term or any Exchange 
Fund that is not a money market fund can be effected on the same basis. 

   No CDSC is imposed at the time of any exchange of shares, although any 
applicable CDSC will be imposed upon ultimate redemption. During the period 
of time the shareholder remains 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 Global Short-Term, the holding period 
previously frozen when the first exchange was made resumes on the last day of 
the month in which shares of a Dean Witter Multi-Class Fund or shares of 
Global Short-Term are reacquired. Thus, the CDSC is based upon the time 
(calculated as described above) the shareholder was invested in shares of a 
Dean Witter Multi-Class Fund or in shares of Global Short-Term (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 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 shares of Global Short-Term or 
Class B shares of another Dean Witter Multi-Class Fund having a different 
CDSC schedule than that of this Fund will be subject to the higher CDSC 
schedule, even if such shares are subsequently re-exchanged for shares of the 
fund with the lower CDSC schedule. 

   Additional Information Regarding Exchanges. Purchases and exchanges should 
be made for investment purposes only. A pattern of frequent exchanges may be 
deemed by the Investment Manager to be abusive and contrary to the best 
interests of the Fund's other shareholders and, at the Investment Manager's 
discretion, may be limited by the Fund's refusal to accept additional 
purchases and/or exchanges from the investor. Although the Fund does not have 
any specific definition of what constitutes a pattern of frequent exchanges, 
and will consider all relevant factors in determining whether a particular 
situation is abusive and contrary to the best interests of the Fund and its 
other shareholders, investors should be aware that the Fund and each of the 
other 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 

                               24           
<PAGE>
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 
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. 

                               25           
<PAGE>
   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 repurchase 
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 ac- 

                               26           
<PAGE>
count 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. 

   Distributions of net long-term capital gains, if any, are taxable to 
shareholders as long-term capital gains regardless of how long a shareholder 
has held the Fund's shares and regardless of whether the distribution is 
received in additional shares or in cash. Capital gains distributions are not 
eligible for the dividends received deduction. 

   The Fund may at times make payments from sources other than income or net 
capital gains. Payments from such sources 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. Shareholders will also be notified of their proportionate share of 
long-term capital gains distributions that are eligible for a reduced rate of 
tax under the Taxpayer Relief Act of 1997. To avoid being subject to a 31% 
federal backup withholding tax on taxable dividends, capital gains 
distributions and the proceeds of redemptions and repurchases, shareholders' 
taxpayer identification numbers must be furnished and certified as to their 
accuracy. 

   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 

                               27           
<PAGE>
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 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 

                               28           
<PAGE>
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. 

                               29           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) 

<TABLE>
<CAPTION>
 NUMBER OF 
   SHARES                                                                          VALUE 
- ------------------------------------------------------------------------------------------------ 
<S>          <C>      <C>                                                     <C>
             COMMON STOCKS (98.2%) 
             Advertising/Marketing Services (0.3%) 
     8,466   Cognizant Corp.  ................................................  $   422,771 
     6,575   Interpublic Group of Companies, Inc.  ...........................      358,337 
     8,460   Omnicom Group, Inc.  ............................................      387,045 
                                                                              -------------- 
                                                                                  1,168,153 
                                                                              -------------- 
             Aerospace & Defense (1.2%) 
    52,223   Boeing Co.  .....................................................    2,833,098 
     3,265   General Dynamics Corp.  .........................................      283,239 
    10,127   Lockheed Martin Corp.  ..........................................    1,181,694 
     3,481   Northrop Grumman Corp.  .........................................      483,859 
                                                                              -------------- 
                                                                                  4,781,890 
                                                                              -------------- 
             Agriculture Related (0.2%) 
    29,108   Archer-Daniels-Midland Co.  .....................................      653,111 
     3,433   Pioneer Hi-Bred International, Inc.  ............................      356,174 
                                                                              -------------- 
                                                                                  1,009,285 
                                                                              -------------- 
             Air Freight (0.1%) 
     7,626   Federal Express Corp.  ..........................................      485,681 
                                                                              -------------- 
             Airlines (0.4%) 
     4,790   AMR Corp.*  .....................................................      606,234 
     3,840   Delta Air Lines, Inc.  ..........................................      434,160 
    11,426   Southwest Airlines Co.  .........................................      327,783 
     4,739   US Airways Group Inc.*  .........................................      300,038 
                                                                              -------------- 
                                                                                  1,668,215 
                                                                              -------------- 
             Aluminum (0.3%) 
    11,845   Alcan Aluminium Ltd. (Canada) ...................................      367,935 
     9,006   Aluminum Co. of America  ........................................      660,815 
     3,849   Reynolds Metals Co.  ............................................      239,841 
                                                                              -------------- 
                                                                                  1,268,591 
                                                                              -------------- 
             Auto Parts - After Market (0.5%) 
     4,108   Cooper Tire & Rubber Co.  .......................................       94,741 
     5,454   Dana Corp.  .....................................................      297,584 
     3,288   Echlin, Inc.  ...................................................      166,249 
     9,330   Genuine Parts Co.  ..............................................      345,210 
     8,142   Goodyear Tire & Rubber Co.  .....................................      562,816 
     6,179   ITT Industries, Inc.  ...........................................      211,631 
     6,427   TRW, Inc.  ......................................................      352,280 
                                                                              -------------- 
                                                                                  2,030,511 
                                                                              -------------- 
             Automobiles (1.7%) 
    34,588   Chrysler Corp.  .................................................    1,346,770 
    62,651   Ford Motor Co.  .................................................    3,543,697 
    36,926   General Motors Corp.  ...........................................    2,545,586 
                                                                              -------------- 
                                                                                  7,436,053 
                                                                              -------------- 
             Banks - Money Center (3.8%) 
    36,206   BankAmerica Corp.  ..............................................  $ 2,805,965 
     5,115   Bankers Trust New York Corp.  ...................................      604,849 
    22,004   Chase Manhattan Corp.  ..........................................    2,729,871 
    23,887   Citicorp  .......................................................    3,165,027 
    15,188   First Chicago NBD Corp.  ........................................    1,248,264 
    32,760   First Union Corp.  ..............................................    1,726,042 
     9,275   Morgan (J.P.) & Co., Inc.  ......................................    1,108,362 
    49,094   NationsBank Corp.  ..............................................    3,362,939 
                                                                              -------------- 
                                                                                 16,751,319 
                                                                              -------------- 
             Banks - Regional (4.6%) 
    33,709   Banc One Corp.  .................................................    1,904,558 
    19,665   Bank of New York Co., Inc.  .....................................    1,151,632 
     7,598   BankBoston Corp.  ...............................................      757,426 
     7,143   BB&T Corporation  ...............................................      443,312 
     2,864   Cincinnati Financial Corp.  .....................................      386,282 
     5,502   Comerica, Inc.  .................................................      554,670 
    10,328   CoreStates Financial Corp.  .....................................      872,070 
     8,041   Fifth Third Bancorp  ............................................      633,229 
    14,225   Fleet Financial Group, Inc.  ....................................    1,121,108 
     9,971   Huntington Bancshares, Inc.  ....................................      357,710 
    11,469   KeyCorp  ........................................................      803,547 
    13,292   Mellon Bank Corp.  ..............................................      828,258 
     6,801   Mercantile Bancorporation, Inc.  ................................      378,306 
    11,157   National City Corp.  ............................................      727,994 
     5,828   Northern Trust Corp.  ...........................................      441,471 
    39,434   Norwest Corp.  ..................................................    1,614,329 
    15,926   PNC Bank Corp.  .................................................      883,893 
     2,858   Republic New York Corp.  ........................................      345,818 
     8,381   State Street Corp.  .............................................      518,051 
     9,187   Summit Bancorp  .................................................      456,479 
    11,009   SunTrust Banks, Inc.  ...........................................      811,914 
     9,128   Synovus Financial Corp.  ........................................      320,621 
    12,818   U.S. Bancorp  ...................................................    1,474,871 
    10,650   Wachovia Corp.  .................................................      846,675 
     4,527   Wells Fargo & Co.  ..............................................    1,457,694 
                                                                              -------------- 
                                                                                 20,091,918 
                                                                              -------------- 
             Beverages - Alcoholic (0.5%) 
    25,579   Anheuser-Busch Companies, Inc. ..................................    1,199,016 
     3,601   Brown-Forman Corp. (Class B)  ...................................      199,855 
     1,933   Coors (Adolph) Co. (Class B)  ...................................       60,406 
    18,610   Seagram Co. Ltd. (Canada)  ......................................      707,180 
                                                                              -------------- 
                                                                                  2,166,457 
                                                                              -------------- 
             Beverages - Soft Drinks (2.7%) 
   129,126   Coca Cola Co.**  ................................................    8,869,342 
    79,206   PepsiCo, Inc.  ..................................................    2,895,969 
                                                                              -------------- 
                                                                                 11,765,311 
                                                                              -------------- 

                      SEE NOTES TO FINANCIAL STATEMENTS 

                               30           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

 NUMBER OF 
   SHARES                                                                          VALUE 
- ------------------------------------------------------------------------------------------------ 
             Biotechnology (0.1%) 
    13,741   Amgen Inc.*  ....................................................  $   729,991 
                                                                              -------------- 
             Broadcast Media (1.0%) 
    36,755   CBS Corp.  ......................................................    1,137,108 
     5,116   Clear Channel Communications, Inc.*  ............................      463,637 
             Tele-Communications, Inc. 
    26,481   (Class A)*  .....................................................      769,604 
    31,693   U.S. West Media Group, Inc.*  ...................................    1,020,118 
    18,418   Viacom, Inc. (Class B)*  ........................................      884,064 
                                                                              -------------- 
                                                                                  4,274,531 
                                                                              -------------- 
             Building Materials (0.2%) 
     2,126   Armstrong World Industries Inc.  ................................      166,891 
     8,610   Masco Corp.  ....................................................      468,169 
     2,785   Owens-Corning ...................................................       85,987 
                                                                              -------------- 
                                                                                    721,047 
                                                                              -------------- 
             Chemicals (1.7%) 
     5,720   Air Products & Chemicals, Inc.  .................................      480,122 
    11,839   Dow Chemical Co.  ...............................................    1,083,268 
    59,079   DuPont (E.I.) de Nemours & Co., Inc.  ...........................    3,622,281 
     4,087   Eastman Chemical Co.  ...........................................      267,698 
     3,750   Goodrich (B.F.) Co.  ............................................      185,859 
     5,044   Hercules, Inc.  .................................................      243,688 
     9,300   PPG Industries, Inc.  ...........................................      602,756 
     8,240   Praxair, Inc.  ..................................................      393,975 
     3,209   Rohm & Haas Co.  ................................................      327,117 
     6,469   Union Carbide Corp.  ............................................      300,404 
                                                                              -------------- 
                                                                                  7,507,168 
                                                                              -------------- 
             Chemicals - Diversified (0.4%) 
     7,533   Engelhard Corp.  ................................................      136,536 
     1,936   FMC Corp.*  .....................................................      140,118 
    30,959   Monsanto Co.  ...................................................    1,575,039 
                                                                              -------------- 
                                                                                  1,851,693 
                                                                              -------------- 
             Chemicals -Specialty (0.3%) 
     3,876   Grace (W. R.) & Co.  ............................................      325,342 
     3,123   Great Lakes Chemical Corp.  .....................................      151,856 
     5,701   International Flavors & Fragrances, Inc.  .......................      262,246 
     6,946   Morton International, Inc.  .....................................      229,652 
     3,485   Nalco Chemical Co.  .............................................      140,271 
     5,232   Sigma-Aldrich Corp.  ............................................      206,664 
                                                                              -------------- 
                                                                                  1,316,031 
                                                                              -------------- 
             Commercial & Consumer Services (0.7%) 
     5,432   Block (H.&R.), Inc.  ............................................  $   255,643 
    41,270   Cendant Corp.*  .................................................    1,547,625 
     8,893   Dun & Bradstreet Corp.  .........................................      297,915 
    17,150   Laidlaw, Inc. (Canada) ..........................................      251,891 
    13,128   Service Corp. International  ....................................      497,223 
                                                                              -------------- 
                                                                                  2,850,297 
                                                                              -------------- 
             Communications Equipment (1.0%) 
     4,706   Andrew Corp.*  ..................................................      130,003 
     4,158   Harris Corp.  ...................................................      210,759 
    31,166   Motorola, Inc.  .................................................    1,737,504 
    27,358   Northern Telecom Ltd. (Canada) ..................................    1,458,523 
     4,058   Scientific-Atlanta, Inc.  .......................................       71,015 
     9,452   Tellabs, Inc.*  .................................................      570,664 
                                                                              -------------- 
                                                                                  4,178,468 
                                                                              -------------- 
             Computer - Networking (1.0%) 
    18,062   3Com Corp.*  ....................................................      645,716 
    11,047   Bay Networks, Inc.*  ............................................      374,217 
     8,229   Cabletron Systems, Inc.*  .......................................      127,549 
    52,531   Cisco Systems, Inc.*  ...........................................    3,460,480 
                                                                              -------------- 
                                                                                  4,607,962 
                                                                              -------------- 
             Computer Software & Services (3.5%) 
     3,804   Adobe Systems, Inc.  ............................................      168,089 
     2,504   Autodesk, Inc.  .................................................      118,627 
    28,543   Computer Associates International, Inc.  ........................    1,345,089 
     4,032   Computer Sciences Corp.*  .......................................      422,100 
    11,033   HBO & Co.  ......................................................      597,161 
   126,001   Microsoft Corp.*_**  ............................................   10,678,585 
    18,218   Novell, Inc.*  ..................................................      191,289 
    51,192   Oracle Corp.*  ..................................................    1,260,603 
     6,648   Parametric Technology Corp.*  ...................................      402,204 
     1,300   Shared Medical Systems Corp.  ...................................       99,369 
                                                                              -------------- 
                                                                                 15,283,116 
                                                                              -------------- 
             Computers - Peripheral Equipment (0.3%) 
    25,893   EMC Corp.*  .....................................................      990,407 
    12,760   Seagate Technology, Inc.*  ......................................      310,227 
                                                                              -------------- 
                                                                                  1,300,634 
                                                                              -------------- 
             Computers - Systems (2.7%) 
     6,644   Apple Computer, Inc.*  ..........................................      156,964 
    79,046   COMPAQ Computer Corp.  ..........................................    2,534,412 
     2,495   Data General Corp.*  ............................................       51,459 
    17,043   Dell Computer Corp.*  ...........................................    2,382,824 

                      SEE NOTES TO FINANCIAL STATEMENTS 

                               31           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

 NUMBER OF 
   SHARES                                                                          VALUE 
- ------------------------------------------------------------------------------------------------ 
     7,717   Digital Equipment Corp.*  .......................................  $   439,387 
    50,757   International Business Machines Corp.**  ........................    5,300,934 
    19,559   Sun Microsystems, Inc.*  ........................................      931,497 
                                                                              -------------- 
                                                                                 11,797,477 
                                                                              -------------- 
             Consumer - Noncyclical (0.0%) 
             American Greetings Corp. 
     3,843   (Class A)  ......................................................      175,337 
     2,040   Jostens, Inc.  ..................................................       47,940 
                                                                              -------------- 
                                                                                    223,277 
                                                                              -------------- 
             Containers - Metal & Glass (0.1%) 
     1,574   Ball Corp.  .....................................................       51,352 
     6,696   Crown Cork & Seal Co., Inc.  ....................................      361,584 
     7,322   Owens-Illinois, Inc.*  ..........................................      280,982 
                                                                              -------------- 
                                                                                    693,918 
                                                                              -------------- 
             Containers - Paper (0.1%) 
     2,767   Bemis Company, Inc.  ............................................      124,688 
     5,181   Stone Container Corp.  ..........................................       58,286 
     2,970   Temple-Inland, Inc.  ............................................      177,086 
     3,622   Union Camp Corp.  ...............................................      216,414 
                                                                              -------------- 
                                                                                    576,474 
                                                                              -------------- 
             Data Processing (0.5%) 
    15,275   Automatic Data Processing, Inc. .................................      932,730 
     3,985   Ceridian Corp.*  ................................................      185,552 
     7,867   Equifax, Inc.  ..................................................      282,720 
    22,347   First Data Corp.  ...............................................      759,798 
                                                                              -------------- 
                                                                                  2,160,800 
                                                                              -------------- 
             Distributors - Food & Health (0.2%) 
     5,709   Cardinal Health, Inc.  ..........................................      467,424 
     3,158   Supervalu, Inc.  ................................................      150,400 
     8,930   Sysco Corp.  ....................................................      420,268 
                                                                              -------------- 
                                                                                  1,038,092 
                                                                              -------------- 
             Electrical Equipment (3.9%) 
    11,465   AMP, Inc.  ......................................................      506,610 
    23,138   Emerson Electric Co.  ...........................................    1,476,494 
   170,868   General Electric Co.**  .........................................   13,284,987 
     2,619   General Signal Corp.  ...........................................      106,397 
     6,651   Honeywell, Inc.  ................................................      527,092 
     4,489   Raychem Corp.  ..................................................      194,991 
    10,896   Rockwell International Corp.  ...................................      659,208 
     2,868   Thomas & Betts Corp.  ...........................................      162,580 
                                                                              -------------- 
                                                                                 16,918,359 
                                                                              -------------- 
             Electronic Components (0.0%) 
     2,593   Grainger (W.W.), Inc.  ..........................................  $   251,035 
     9,775   Silicon Graphics, Inc.*  ........................................      147,236 
                                                                              -------------- 
                                                                                    398,271 
                                                                              -------------- 
             Electronics - Defense (0.2%) 
    17,694   Raytheon Co. (Class B)  .........................................    1,040,628 
                                                                              -------------- 
             Electronics - Instrumentation (0.9%) 
     2,382   EG & G, Inc.  ...................................................       64,165 
    54,273   Hewlett-Packard Co.  ............................................    3,636,291 
     2,509   Perkin-Elmer Corp.  .............................................      183,627 
     2,618   Tektronix, Inc.  ................................................      116,828 
                                                                              -------------- 
                                                                                  4,000,911 
                                                                              -------------- 
             Electronics - Semiconductors (2.2%) 
     7,361   Advanced Micro Devices, Inc.*  ..................................      172,523 
    85,413   Intel Corp.**  ..................................................    7,655,140 
     7,402   LSI Logic Corp.*  ...............................................      175,335 
    10,999   Micron Technology, Inc.*  .......................................      365,029 
     8,523   National Semiconductor Corp.*  ..................................      203,487 
    20,374   Texas Instruments, Inc.  ........................................    1,179,145 
                                                                              -------------- 
                                                                                  9,750,659 
                                                                              -------------- 
             Engineering & Construction (0.0%) 
     4,378   Fluor Corp.  ....................................................      206,040 
     2,122   Foster Wheeler Corp.  ...........................................       56,763 
     2,902   McDermott International, Inc.  ..................................      114,266 
                                                                              -------------- 
                                                                                    377,069 
                                                                              -------------- 
             Entertainment (0.9%) 
     3,836   King World Productions Inc.*  ...................................      102,373 
    35,226   Walt Disney Co.  ................................................    3,943,110 
                                                                              -------------- 
                                                                                  4,045,483 
                                                                              -------------- 
             Facilities & Environmental Services (0.0%) 
     3,043   Safety-Kleen Corp.  .............................................       81,590 
                                                                              -------------- 
             Finance -Consumer (0.6%) 
     2,773   Beneficial Corp.  ...............................................      327,214 
     5,635   Countrywide Credit Industries, Inc.  ............................      250,405 
     7,090   Green Tree Financial Corp.  .....................................      162,627 
     5,575   Household International, Inc.  ..................................      724,053 
    26,149   MBNA Corp.  .....................................................      936,461 
     4,967   Providian Financial Corp.  ......................................      281,877 
                                                                              -------------- 
                                                                                  2,682,637 
                                                                              -------------- 
             Finance - Diversified (2.8%) 
    24,265   American Express Co.  ...........................................   2,185,367 
    12,718   American General Corp.  .........................................     739,234 


                      SEE NOTES TO FINANCIAL STATEMENTS 

                               32           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

 NUMBER OF 
   SHARES                                                                          VALUE 
- ------------------------------------------------------------------------------------------------ 
   55,357    Fannie Mae  .....................................................  $ 3,532,469 
   36,260    Freddie Mac  ....................................................    1,713,285 
    6,155    Hartford Financial Services Group Inc.  .........................      604,729 
    5,320    Lehman Brothers Holdings, Inc. ..................................      335,492 
    5,957    MGIC Investment Corp.  ..........................................      438,956 
   30,930    Morgan Stanley, Dean Witter, Discover & Co. (Note 4)  ...........    2,155,434 
   10,178    SunAmerica, Inc.  ...............................................      461,191 
                                                                              -------------- 
                                                                                 12,166,157 
                                                                              -------------- 
             Foods (2.0%) 
    7,495    Bestfoods  ......................................................      789,786 
   23,888    Campbell Soup Co.  ..............................................    1,386,997 
   24,664    ConAgra, Inc.  ..................................................      739,920 
    8,262    General Mills, Inc.  ............................................      594,348 
   19,171    Heinz (H.J.) Co.  ...............................................    1,079,567 
    7,453    Hershey Foods Corp.  ............................................      497,022 
   21,454    Kellogg Co.  ....................................................      914,477 
    7,230    Quaker Oats Company (The)  ......................................      389,516 
    5,560    Ralston-Ralston Purina Group  ...................................      563,992 
   25,057    Sara Lee Corp.  .................................................    1,415,720 
    6,063    Wrigley (WM.) Jr. Co. (Class A)  ................................      463,062 
                                                                              -------------- 
                                                                                  8,834,407 
                                                                              -------------- 
             Footwear (0.2%) 
   15,164    Nike, Inc. (Class B)  ...........................................      665,320 
    2,934    Reebok International Ltd. (United Kingdom)  .....................       91,504 
                                                                              -------------- 
                                                                                    756,824 
                                                                              -------------- 
             Gaming, Lottery, & Pari-mutuel Companies (0.0%) 
    5,266    Harrah's Entertainment, Inc.*  ..................................      110,915 
    9,335    Mirage Resorts, Inc.*  ..........................................      213,538 
                                                                              -------------- 
                                                                                    324,453 
                                                                              -------------- 
             Gold & Precious Metals Mining (0.2%) 
   19,447    Barrick Gold Corp. (Canada)  ....................................      375,570 
   11,986    Battle Mountain Gold Co.  .......................................       71,916 
    7,655    Homestake Mining Co.  ...........................................       76,550 
    8,156    Newmont Mining Corp.  ...........................................      236,014 
   12,497    Placer Dome Inc. (Canada)  ......................................      160,899 
                                                                              -------------- 
                                                                                    920,949 
                                                                              -------------- 
             Hardware & Tools (0.1%) 
    4,930    Black & Decker Corp.  ...........................................      248,349 
    3,189    Snap-On, Inc.  ..................................................      135,532 
    4,647    Stanley Works  ..................................................      222,185 
                                                                              -------------- 
                                                                                    606,066 
                                                                              -------------- 
             Healthcare - Diversified (4.4%) 
   39,933    Abbott Laboratories  ............................................  $ 2,987,488 
    3,387    Allergan, Inc.  .................................................      118,545 
   33,918    American Home Products Corp. ....................................    3,179,813 
   51,910    Bristol-Myers Squibb Co.  .......................................    5,200,733 
   70,214    Johnson & Johnson  ..............................................    5,301,157 
    3,823    Mallinckrodt Group, Inc.  .......................................      148,380 
   14,218    Warner-Lambert Co.  .............................................    2,079,383 
                                                                              -------------- 
                                                                                 19,015,499 
                                                                              -------------- 
             Healthcare - Drugs (5.0%) 
   57,917    Lilly (Eli) & Co.  ..............................................    3,811,663 
   62,560    Merck & Co., Inc.**  ............................................    7,980,310 
   67,521    Pfizer, Inc.  ...................................................    5,975,609 
   26,484    Pharmacia & Upjohn, Inc.  .......................................    1,047,773 
   38,222    Schering-Plough Corp.  ..........................................    2,907,261 
                                                                              -------------- 
                                                                                 21,722,616 
                                                                              -------------- 
             Healthcare - HMOs (0.2%) 
    8,543    Humana, Inc.*  ..................................................      217,313 
    9,833    United Healthcare Corp.  ........................................      596,740 
                                                                              -------------- 
                                                                                    814,053 
                                                                              -------------- 
             Healthcare - Long Term (0.2%) 
   20,551    Healthsouth Corp.*  .............................................      554,877 
    3,320    Manor Care, Inc.  ...............................................      124,708 
                                                                              -------------- 
                                                                                    679,585 
                                                                              -------------- 
             Healthcare - Specialized Services (0.0%) 
    4,439    ALZA Corp. (Class A)*  ..........................................      165,908 
                                                                              -------------- 
             Heavy Duty Trucks & Parts (0.1%) 
    1,994    Cummins Engine Co., Inc.  .......................................      115,403 
    3,932    Navistar International Corp.*  ..................................      119,435 
    4,060    PACCAR, Inc.  ...................................................      256,288 
                                                                              -------------- 
                                                                                    491,126 
                                                                              -------------- 
             Home Building (0.0%) 
    1,522    Centex Corp.  ...................................................      111,201 
    1,875    Fleetwood Enterprises, Inc.  ....................................       87,891 
    2,029    Kaufman & Broad Home Corp.  .....................................       52,500 
    1,106    Pulte Corp.  ....................................................       50,323 
                                                                              -------------- 
                                                                                    301,915 
                                                                              -------------- 
             Hospital Management (0.3%) 
   33,809    Columbia/HCA Healthcare Corp. ...................................      917,069 
   15,937    Tenet Healthcare Corp.*  ........................................      594,649 
                                                                              --------------
                                                                                  1,511,718
                                                                              --------------
      
                      SEE NOTES TO FINANCIAL STATEMENTS 

                               33           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

 NUMBER OF 
   SHARES                                                                          VALUE 
- ------------------------------------------------------------------------------------------------ 
             Household Furnishings & Appliances (0.1%) 
    4,958    Maytag Corp.  ...................................................  $   223,110 
    3,893    Whirlpool Corp.  ................................................      260,101 
                                                                              -------------- 
                                                                                    483,211 
                                                                              -------------- 
             Household Products - Non-durable (2.7%) 
    5,392    Clorox Co.  .....................................................      473,148 
   15,437    Colgate-Palmolive Co.  ..........................................    1,253,291 
   10,903    Fort James Corp.  ...............................................      494,724 
   28,671    Kimberly-Clark Corp.  ...........................................    1,596,616 
   70,169    Procter & Gamble Co.  ...........................................    5,959,979 
   33,404    Unilever N.V. & PLC (Netherlands) ...............................    2,148,295 
                                                                              -------------- 
                                                                                 11,926,053 
                                                                              -------------- 
             Housewares (0.2%) 
    8,942    Fortune Brands, Inc.  ...........................................      354,886 
    8,302    Newell Co.  .....................................................      380,854 
    7,819    Rubbermaid, Inc.  ...............................................      226,751 
    3,193    Tupperware Corp.  ...............................................       85,812 
                                                                              -------------- 
                                                                                  1,048,303 
                                                                              -------------- 
             Insurance Brokers (0.4%) 
    8,729    AON Corp.  ......................................................      522,103 
    8,868    Marsh & McLennan Co., Inc.  .....................................      768,745 
    5,111    MBIA Inc.  ......................................................      374,061 
                                                                              -------------- 
                                                                                  1,664,909 
                                                                              -------------- 
             Investment Banking/Brokerage (0.4%) 
   17,392    Merrill Lynch & Co., Inc.  ......................................    1,244,615 
   13,866    Schwab (Charles) Corp.  .........................................      523,441 
                                                                              -------------- 
                                                                                  1,768,056 
                                                                              -------------- 
             Leisure Time - Products (0.2%) 
    5,185    Brunswick Corp.  ................................................      164,624 
    6,619    Hasbro, Inc.  ...................................................      240,352 
   15,157    Mattel, Inc.  ...................................................      641,331 
                                                                              -------------- 
                                                                                  1,046,307 
                                                                              -------------- 
             Life & Health Insurance (0.6%) 
    7,757    Aetna Inc.  .....................................................      677,768 
    9,808    Conseco, Inc.  ..................................................      460,363 
    3,694    Jefferson-Pilot Corp.  ..........................................      309,834 
    7,310    Torchmark Corp.  ................................................      340,372 
    3,299    Transamerica Corp.  .............................................      384,127 
    7,271    UNUM Corp.  .....................................................      374,002 
                                                                              -------------- 
                                                                                  2,546,466 
                                                                              -------------- 
             Lodging - Hotels (0.2%) 
   13,048    Hilton Hotels Corp.  ............................................      388,994 
    6,643    Marriot International, Inc.  ....................................      503,207 
                                                                              -------------- 
                                                                                    892,201 
                                                                              -------------- 
             Machinery - Diversified (0.8%) 
    3,895    Case Corp.  .....................................................  $   253,418 
   19,436    Caterpillar Inc.  ...............................................    1,061,692 
    2,080    Cincinnati Milacron, Inc.  ......................................       64,220 
    6,319    Cooper Industries, Inc.  ........................................      354,654 
   13,154    Deere & Co.  ....................................................      738,268 
   11,603    Dover Corp.  ....................................................      448,166 
    2,577    Harnischfeger Industries, Inc.  .................................       91,161 
    8,654    Ingersoll-Rand Co.  .............................................      412,147 
      424    NACCO Industries, Inc. (Class A) ................................       55,147 
    3,284    Timken Co.  .....................................................      105,909 
                                                                              -------------- 
                                                                                  3,584,782 
                                                                              -------------- 
             Manufacturing - Diversified (2.2%) 
    1,468    Aeroquip-Vickers, Inc.  .........................................       85,236 
   29,452    AlliedSignal, Inc.  .............................................    1,253,551 
   12,044    Corning, Inc.  ..................................................      489,288 
    2,394    Crane Co.  ......................................................      117,306 
    4,030    Eaton Corp.  ....................................................      387,132 
   13,014    Illinois Tool Works Inc.  .......................................      780,027 
    4,371    Johnson Controls, Inc.  .........................................      242,864 
   21,337    Minnesota Mining & Manufacturing Co.  ...........................    1,820,313 
    2,255    National Service Industries, Inc. ...............................      125,012 
    8,883    Tenneco, Inc.  ..................................................      365,313 
    8,599    Textron Inc.  ...................................................      644,388 
    7,901    Thermo Electron Corp.*  .........................................      323,941 
   27,800    Tyco International Ltd.  ........................................    1,410,850 
   12,164    United Technologies Corp.  ......................................    1,086,397 
    9,594    UST, Inc.  ......................................................      339,987 
                                                                              -------------- 
                                                                                  9,471,605 
                                                                              -------------- 
             Manufacturing - Specialized (0.2%) 
    5,375    Avery Dennison Corp.  ...........................................      271,438 
    1,315    Briggs & Stratton Corp.  ........................................       58,271 
    2,273    Millipore Corp.  ................................................       85,948 
    6,641    Pall Corp.  .....................................................      139,046 
    5,825    Parker-Hannifin Corp.  ..........................................      271,591 
                                                                              -------------- 
                                                                                    826,294 
                                                                              -------------- 
             Medical Products & Supplies (1.0%) 
    2,992    Bard (C.R.), Inc.  ..............................................      104,346 
    2,890    Bausch & Lomb, Inc.  ............................................      129,508 
   14,621    Baxter International, Inc.  .....................................      827,914 
    6,376    Becton, Dickinson & Co.  ........................................      405,673 
    5,806    Biomet, Inc.  ...................................................      173,091 
   10,135    Boston Scientific Corp.*  .......................................      605,566 
    7,732    Guidant Corp.  ..................................................      563,953 

                      SEE NOTES TO FINANCIAL STATEMENTS 

                               34           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

 NUMBER OF 
   SHARES                                                                          VALUE 
- ------------------------------------------------------------------------------------------------ 
    24,487   Medtronic, Inc.  ................................................  $ 1,300,872 
     4,792   St. Jude Medical, Inc.*  ........................................      174,908 
     3,953   United States Surgical Corp.  ...................................      121,061 
                                                                              -------------- 
                                                                                  4,406,892 
                                                                              -------------- 
             Metals & Mining (0.1%) 
     2,106   ASARCO, Inc.  ...................................................       46,595 
     4,875   Cyprus Amax Minerals Co.  .......................................       79,828 
    10,098   Freeport-McMoran Copper & Gold, Inc. (Class B)  .................      152,101 
     8,711   Inco Ltd. (Canada)  .............................................      154,076 
     3,067   Phelps Dodge Corp.  .............................................      194,755 
                                                                              -------------- 
                                                                                    627,355 
                                                                              -------------- 
             Multi-line Insurance (2.2%) 
    36,625   American International Group, Inc.  .............................    4,401,867 
     3,862   CIGNA Corp.  ....................................................      737,642 
     5,322   Lincoln National Corp.  .........................................      445,718 
     6,001   Loews Corp.  ....................................................      601,975 
    59,868   Travelers Group, Inc.  ..........................................    3,337,641 
                                                                              -------------- 
                                                                                  9,524,843 
                                                                              -------------- 
             Office Equipment & Supplies (0.2%) 
     4,629   Moore Corp. Ltd. (Canada)  ......................................       72,617 
    15,070   Pitney Bowes, Inc.  .............................................      706,406 
     9,134   Unisys Corp.*  ..................................................      163,270 
                                                                              -------------- 
                                                                                    942,293 
                                                                              -------------- 
             Oil & Gas - Exploration & Production (0.2%) 
     8,156   Burlington Northern Santa Fe Corp.  .............................      812,542 
                                                                              -------------- 
             Oil & Gas - Refining & Marketing (0.0%) 
     3,899   Ashland, Inc.  ..................................................      217,126 
                                                                              -------------- 
             Oil & Gas Drilling (0.8%) 
     8,805   Baker Hughes, Inc.  .............................................      360,455 
     9,137   Dresser Industries, Inc.  .......................................      408,310 
    13,678   Halliburton Co.  ................................................      636,027 
     2,604   Helmerich & Payne, Inc.  ........................................       75,353 
     4,516   Rowan Companies, Inc.*  .........................................      127,295 
    25,828   Schlumberger Ltd.  ..............................................    1,946,786 
     2,819   Western Atlas, Inc.*  ...........................................      214,068 
                                                                              -------------- 
                                                                                  3,768,294 
                                                                              -------------- 
             Oil - Exploration & Production (0.2%) 
     3,116   Anardarko Petroleum Corp.*  .....................................      200,982 
     4,737   Apache Corp.*  ..................................................      161,058 
     9,204   Burlington Resources, Inc.  .....................................  $   411,879 
     5,502   Oryx Energy Co.*  ...............................................      139,957 
                                                                              -------------- 
                                                                                    913,876 
                                                                              -------------- 
             Oil - Integrated - Domestic (1.0%) 
     4,787   Amerada Hess Corp.  .............................................      283,929 
    16,737   Atlantic Richfield Co.  .........................................    1,301,302 
     2,487   Kerr-McGee Corp.  ...............................................      168,183 
    17,687   Occidental Petroleum Corp.  .....................................      452,124 
     2,466   Pennzoil Co.  ...................................................      165,068 
    13,741   Phillips Petroleum Co.  .........................................      673,309 
     3,774   Sun Co., Inc.  ..................................................      150,724 
    13,241   Union Pacific Resources Group, Inc.  ............................      296,267 
    12,880   Unocal Corp.  ...................................................      485,415 
    15,032   USX-Marathon Group  .............................................      519,544 
                                                                              -------------- 
                                                                                  4,495,865 
                                                                              -------------- 
             Oil - Integrated - International (5.4%) 
    25,423   Amoco Corp.  ....................................................    2,160,955 
    34,288   Chevron Corp.  ..................................................    2,781,614 
   128,744   Exxon Corp.**  ..................................................    8,223,523 
    40,988   Mobil Corp.  ....................................................    2,969,068 
   111,878   Royal Dutch Petroleum Co. (ADR)(Netherlands)**  .................    6,076,374 
    28,613   Texaco, Inc.  ...................................................    1,596,963 
                                                                              -------------- 
                                                                                 23,808,497 
                                                                              -------------- 
             Paper & Forest Products (0.6%) 
     2,907   Boise Cascade Corp.  ............................................       96,839 
     5,007   Champion International Corp.  ...................................      255,670 
     4,835   Georgia-Pacific Corp.  ..........................................      283,754 
    15,777   International Paper Co.  ........................................      735,603 
     5,704   Louisiana-Pacific Corp.  ........................................      125,132 
     5,459   Mead Corp.  .....................................................      186,630 
     1,507   Potlatch Corp.  .................................................       65,272 
     5,322   Westvaco Corp.  .................................................      172,965 
    10,406   Weyerhaeuser Co.  ...............................................      519,650 
     5,797   Willamette Industries, Inc.  ....................................      214,127 
                                                                              -------------- 




                                                                                  2,655,642 
                                                                              --------------

             Personal Care (0.8%) 
     2,929   Alberto-Culver Co. (Class B)  ...................................       89,151 
     6,903   Avon Products, Inc.  ............................................      486,230 
    29,241   Gillette Co.  ...................................................    3,154,373 
                                                                              -------------- 
                                                                                  3,729,754 
                                                                              -------------- 
             Photography/Imaging (0.6%) 
    16,992   Eastman Kodak Co.  ..............................................    1,115,100 
     6,931   Ikon Office Solutions, Inc.  ....................................      226,557 
                                                                             

                      SEE NOTES TO FINANCIAL STATEMENTS 

                               35           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

 NUMBER OF 
   SHARES                                                                          VALUE 
- ------------------------------------------------------------------------------------------------ 
     2,370   Polaroid Corp.  .................................................  $  108,576 
    17,016   Xerox Corp.  ....................................................   1,509,107 
                                                                              -------------- 
                                                                                 2,959,340 
                                                                              -------------- 
             Property - Casualty Insurance (1.1%) 
    22,388   Allstate Corp.  .................................................   2,087,681 
     8,885   Chubb Corp.  ....................................................     709,134 
     4,095   General Re Corp.  ...............................................     872,235 
     3,764   Progressive Corp.  ..............................................     436,154 
     7,369   SAFECO Corp.  ...................................................     385,951 
     4,376   St. Paul Companies, Inc.  .......................................     387,823 
     5,882   USF&G Corp.  ....................................................     143,741 
                                                                              -------------- 
                                                                                 5,022,719 
                                                                              -------------- 
             Publishing (0.7%) 
     5,009   Dow Jones & Co., Inc.  ..........................................     257,337 
     5,161   McGraw-Hill, Inc.  ..............................................     390,301 
     2,789   Meredith Corp.  .................................................     119,753 
    29,208   Time Warner, Inc.  ..............................................   1,971,540 
     4,618   Times Mirror Co. (Class A)  .....................................     284,296 
                                                                              -------------- 
                                                                                 3,023,227 
                                                                              -------------- 
             Publishing - Newspaper (0.4%) 
    14,791   Gannett Co., Inc.  ..............................................     954,944 
     4,408   Knight-Ridder Newspapers, Inc. ..................................     247,950 
     5,004   New York Times Co. (Class A)  ...................................     327,449 
     6,407   Tribune Co.  ....................................................     413,652 
                                                                              -------------- 
                                                                                 1,943,995 
                                                                              -------------- 
             Railroads (0.4%) 
    11,370   CSX Corp.  ......................................................     636,009 
    19,668   Norfolk Southern Corp.  .........................................     677,317 
    12,892   Union Pacific Corp.  ............................................     657,492 
                                                                              -------------- 
                                                                                 1,970,818 
                                                                              -------------- 
             Restaurants (0.5%) 
     7,979   Darden Restaurants, Inc.  .......................................     107,717 
    35,895   McDonald's Corp.  ...............................................   1,965,251 
     7,923   TRICON Global Restaurants, Inc.*  ...............................     224,815 
     6,877   Wendy's International, Inc.  ....................................     149,145 
                                                                              -------------- 
                                                                                 2,446,928 
                                                                              -------------- 
             Retail - Building Supplies (0.7%) 
    38,194   Home Depot, Inc.  ...............................................   2,437,255 
     9,113   Lowe's Companies, Inc.  .........................................     532,541 
     9,009   Sherwin-Williams Co.  ...........................................     301,238 
                                                                              -------------- 
                                                                                 3,271,034 
                                                                              -------------- 
             Retail - Computers & Electronics (0.1%) 
     5,142   Circuit City Stores, Inc.  ......................................     198,610 
     5,397   Tandy Corp.  ....................................................     240,167 
                                                                              -------------- 
                                                                                   438,777 
                                                                              -------------- 
             Retail - Department Stores (0.6%) 
     5,815   Dillard Department Stores, Inc. (Class A)  ......................  $  207,159 
    10,917   Federated Department Stores, Inc.*  .............................     511,734 
     3,691   Harcourt General, Inc.  .........................................     199,314 
    12,075   May Department Stores Co.  ......................................     733,556 
     1,918   Mercantile Stores Co., Inc.  ....................................     126,228 
     4,031   Nordstrom, Inc.  ................................................     230,775 
    13,049   Penney (J.C.) Co., Inc.  ........................................     922,401 
                                                                              -------------- 
                                                                                 2,931,167 
                                                                              -------------- 
             Retail - Drug Stores (0.5%) 
     8,977   CVS Corp.  ......................................................     664,859 
     2,040   Longs Drug Stores Corp.  ........................................      64,643 
    13,021   Rite Aid Corp.  .................................................     421,555 
    25,683   Walgreen Co.  ...................................................     942,245 
                                                                              -------------- 
                                                                                 2,093,302 
                                                                              -------------- 
             Retail - Food Chains (0.5%) 
    12,820   Albertson's, Inc.  ..............................................     600,136 
    14,214   American Stores Co.  ............................................     358,015 
     3,130   Giant Food, Inc. (Class A)  .....................................     113,658 
     1,995   Great Atlantic & Pacific Tea Co., Inc.  .........................      60,723 
    13,278   Kroger Co.*  ....................................................     560,996 
     7,768   Winn-Dixie Stores, Inc.  ........................................     418,987 
                                                                              -------------- 
                                                                                 2,112,515 
                                                                              -------------- 
             Retail - General Merchandise (2.0%) 
     5,601   Consolidated Stores Corp.*  .....................................     230,341 
    11,089   Costco Companies, Inc.*  ........................................     541,975 
    11,359   Dayton-Hudson Corp.  ............................................     878,193 
    25,411   Kmart Corp.*  ...................................................     339,872 
    20,437   Sears, Roebuck & Co.  ...........................................   1,084,438 
   117,651   Wal-Mart Stores, Inc.  ..........................................   5,448,712 
                                                                              -------------- 
                                                                                 8,523,531 
                                                                              -------------- 
             Retail - Specialty (0.2%) 
     7,882   AutoZone, Inc.*  ................................................     238,431 
     3,302   Pep Boys-Manny, Moe & Jack  .....................................      84,614 
    14,888   Toys 'R' Us, Inc.*  .............................................     390,810 
     7,039   Woolworth Corp.*  ...............................................     167,176 
                                                                              -------------- 
                                                                                   881,031 
                                                                              -------------- 
             Retail - Specialty Apparel (0.4%) 
     5,519   Charming Shoppes, Inc.*  ........................................      24,491 
    20,982   Gap, Inc. (The)  ................................................     937,633 
    14,172   Limited (The), Inc.  ............................................     410,988 
    8,520    TJX Companies, Inc.  ............................................     329,085 
                                                                              -------------- 
                                                                                 1,702,197 
                                                                              -------------- 

                      SEE NOTES TO FINANCIAL STATEMENTS 

                               36           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

 NUMBER OF 
   SHARES                                                                          VALUE 
- ------------------------------------------------------------------------------------------------ 
             Savings & Loan Companies (0.3%) 
     5,714   Ahmanson (H.F.) & Co.  ..........................................  $   356,768 
     2,959   Golden West Financial Corp.  ....................................      264,091 
    13,434   Washington Mutual, Inc.  ........................................      900,918 
                                                                              -------------- 
                                                                                  1,521,777 
                                                                              -------------- 
             Semiconductor Equipment (0.2%) 
    19,023   Applied Materials, Inc.*  .......................................      700,284 
     4,417   KLA-Tencor Corp.*  ..............................................      203,734 
                                                                              -------------- 
                                                                                    904,018 
                                                                              -------------- 
             Specialty Printing (0.1%) 
     4,289   Deluxe Corp.  ...................................................      146,094 
     7,629   Donnelley (R.R.) & Sons Co.  ....................................      302,299 
     6,753   Ecolab, Inc.  ...................................................      194,571 
     1,617   Harland (John H.) Co.  ..........................................       24,558 
                                                                              -------------- 
                                                                                    667,522 
                                                                              -------------- 
             Steel & Iron (2.0%) 
     9,099   Allegheny Teledyne Inc.  ........................................      246,810 
     5,596   Armco, Inc.  ....................................................       29,729 
     5,876   Bethlehem Steel Corp.*  .........................................       62,433 
     2,549   Inland Steel Industries, Inc.  ..................................       52,573 
     4,584   Nucor Corp.  ....................................................      236,076 
     4,476   USX-U.S. Steel Group, Inc.  .....................................      157,220 
     5,048   Worthington Industries, Inc.  ...................................       86,447 
                                                                              -------------- 
                                                                                    871,288 
                                                                              -------------- 
             Telecommunications - Cellular/Wireless (0.3%) 
    26,352   Airtouch Communications, Inc.* ..................................    1,184,193 
     6,132   DSC Communications Corp.*  ......................................      120,341 
     7,693   General Instrument Corp.  .......................................      128,377 
                                                                              -------------- 
                                                                                  1,432,911 
                                                                              -------------- 
             Telecommunications - Long Distance (2.3%) 
    84,801   AT&T Corp.  .....................................................    5,162,261 
    36,364   MCI Communications Corp.  .......................................    1,738,654 
    22,452   Sprint Corp.  ...................................................    1,481,832 
    52,872   WorldCom, Inc.*  ................................................    2,019,050 
                                                                              -------------- 
                                                                                 10,401,797 
                                                                              -------------- 
             Telephones (5.0%) 
     9,676   Alltel Corp.  ...................................................      442,072 
    57,143   Ameritech Corp.  ................................................    2,382,149 
    40,548   Bell Atlantic Corp.  ............................................    3,639,183 
    51,771   BellSouth Corp.  ................................................    3,158,031 
    18,200   Comcast Corp. (Class A Special) .................................      637,000 
     8,564   Frontier Corp.  .................................................      237,116 
    49,993   GTE Corp.  ......................................................    2,705,871 
    33,479   Lucent Technologies Inc.  .......................................    3,628,287 
    47,856   SBC Communications, Inc.  .......................................    3,619,110 
    25,224   U.S. West Communications Group  .................................  $ 1,313,225 
                                                                              -------------- 
                                                                                 21,762,044 
                                                                              -------------- 
             Textiles - Apparel (0.1%) 
     3,822   Fruit of the Loom, Inc. (Class A)* ..............................      122,782 
     3,491   Liz Claiborne, Inc.  ............................................      174,550 
     1,899   Russell Corp.  ..................................................       51,510 
     6,380   VF Corp.  .......................................................      304,246 
                                                                              -------------- 
                                                                                    653,088 
                                                                              -------------- 
             Textiles - Home Furnishings (0.0%) 
             Springs Industries, Inc. 
     1,051   (Class A)  ......................................................       58,790 
                                                                              -------------- 
             Tobacco (1.2%) 
   126,577   Philip Morris Companies, Inc.  ..................................    5,498,188 
                                                                              -------------- 
             Truckers (0.0%) 
     3,995   Ryder System, Inc.  .............................................      146,567 
                                                                              -------------- 
             Utilities - Electric (2.4%) 
     7,160   Ameren Corp.  ...................................................      275,213 
     9,876   American Electric Power Co., Inc.  ..............................      474,048 
     7,704   Baltimore Gas & Electric Co.  ...................................      243,158 
     7,887   Carolina Power & Light Co.  .....................................      329,282 
    11,074   Central & South West Corp.  .....................................      296,922 
     8,226   CINergy Corp.  ..................................................      286,368 
    12,262   Consolidated Edison Co. of New York, Inc.  ......................      521,135 
     9,760   Dominion Resources, Inc.  .......................................      389,180 
     7,572   DTE Energy Co.  .................................................      278,271 
    18,774   Duke Power Co.  .................................................    1,043,130 
    19,917   Edison International  ...........................................      550,207 
    12,734   Entergy Corp.  ..................................................      368,490 
    12,016   FirstEnergy Corp.*  .............................................      347,713 
     9,498   FPL Group, Inc.  ................................................      551,478 
     6,621   GPU, Inc.  ......................................................      266,081 
    14,884   Houston Industries, Inc.  .......................................      385,124 
     7,534   Niagara Mohawk Power Corp.*  ....................................       96,529 
     3,858   Northern States Power Co.  ......................................      211,949 
    15,459   PacifiCorp  .....................................................      373,915 
    11,610   PECO Energy Co.  ................................................      229,298 
    22,877   PG & E Corp.  ...................................................      690,599 
     8,624   PP&L Resources, Inc.  ...........................................      192,962 
             Public Service Enterprise 
    12,103   Group, Inc.  ....................................................      390,322 
    36,031   Southern Co.  ...................................................      889,515 

                      SEE NOTES TO FINANCIAL STATEMENTS 

                               37           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
PORTFOLIO OF INVESTMENTS February 28, 1998 (unaudited) continued 

 NUMBER OF 
   SHARES                                                                          VALUE 
- ------------------------------------------------------------------------------------------------ 
   12,867    Texas Utilities Co.  ............................................ $    520,309 
   11,286    Unicom Corp.  ...................................................      361,857 
                                                                              -------------- 
                                                                                 10,563,055 
                                                                              -------------- 
             Utilities - Natural Gas (0.6%) 
    5,531    Coastal Corp.  ..................................................      351,910 
    2,891    Columbia Gas System, Inc.  ......................................      220,619 
    4,977    Consolidated Natural Gas Co.  ...................................      286,178 
    1,062    Eastern Enterprises  ............................................       47,060 
   16,604    Enron Corp.  ....................................................      780,388 
    2,531    NICOR, Inc.  ....................................................      104,087 
    1,619    ONEOK, Inc.  ....................................................       56,665 
    4,347    Pacific Enterprises  ............................................      157,850 
    1,831    Peoples Energy Corp.  ...........................................       66,145 
    5,739    Sonat, Inc.  ....................................................      247,494 
   16,687    Williams Companies, Inc.  .......................................      545,456 
                                                                              -------------- 
                                                                                  2,863,852 
                                                                              -------------- 
             Waste Management (0.2%) 
   10,320    Browning-Ferris Industries, Inc. ................................      343,785 
   23,757    Waste Management Inc.  ..........................................      593,925 
                                                                              -------------- 
                                                                                    937,710 
                                                                              -------------- 
             TOTAL COMMON STOCKS 
             (Identified Cost $390,140,659)  .................................  428,105,597 
                                                                              -------------- 

</TABLE>

<TABLE>
<CAPTION>
 PRINCIPAL 
 AMOUNT IN 
 THOUSANDS 
- ----------- 
<S>          <C>                                                              <C>
             SHORT-TERM INVESTMENT (0.7%)  ................................... 
             REPURCHASE AGREEMENT 
   $2,915    The Bank of New York 5.4375% due 03/02/98 (dated 02/27/98; 
             proceeds $2,916,669)(a) (Identified Cost $2,915,348).............   2,915,348 
                                                                              ------------- 
             TOTAL INVESTMENTS  .............................................. 431,020,945 
                                                                              ------------- 

</TABLE>

<TABLE>
<CAPTION>
                                         DESCRIPTION, 
   NUMBER OF                            DELIVERY YEAR, 
   CONTRACTS                              AND MONTH                                   VALUE 
- ------------------------------------------------------------------------------------------------ 
<S>            <C>                                                              <C>
               FINANCIAL FUTURES (B)(0.0%) 
               SHORT POSITION 
       23      S&P 500 Index/March 1998 ........................................         $(8,150) 
                                                                                ---------------- 
</TABLE>

<TABLE>
<CAPTION>
<S>                                                                    <C>      <C>
 TOTAL INVESTMENTS 
(Identified Cost $393,056,007)(c) .                                    98.9%         431,020,945 
TOTAL FINANCIAL FUTURES                                                 0.0               (8,150) 
CASH AND OTHER ASSETS IN EXCESS OF 
LIABILITIES .......................                                     1.1            4,916,185 
                                                                      -----     ---------------- 
NET ASSETS ........................                                   100.0%        $435,928,980 
                                                                      =====     ================ 
</TABLE>




















- ------------ 
ADR     American Depository Receipt. 
*       Non-income producing security. 
**      Some or all of these securities are segregated in connection with 
        open futures contracts. 
(a)     Collateralized by $330,862 Federal Home Loan Banks 6.55% due 03/04/02 
        valued at $343,209, $1,015,000 Federal Home Loan Banks 6.25% due 
        10/29/01 valued at $1,039,968, $1,000,000 Federal National Mortgage 
        Assoc. 7.15% due 09/15/05 valued at $1,038,943 and $530,069 Federal 
        National Mortgage Assoc. 6.65% due 03/08/06 valued at $551,535. 
(b)     Value represents variation margin on open futures contracts at 
        February 28, 1998. The market value of these futures contracts is 
        $5,901,900 and the unrealized appreciation is $138,268. 
(c)     The aggregate cost for federal income tax purposes approximates 
        identified cost. The aggregate gross unrealized appreciation is 
        $42,956,830 and the aggregate gross unrealized depreciation is 
        $4,991,892, resulting in net unrealized appreciation of $37,964,938. 

                      SEE NOTES TO FINANCIAL STATEMENTS 

                               38           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
FINANCIAL STATEMENTS 

STATEMENT OF ASSETS AND LIABILITIES 
February 28, 1998 (unaudited) 

<TABLE>
<CAPTION>
<S>                                                        <C>
 ASSETS: 
Investments in securities, at value 
 (identified cost $393,056,007)...........................    $431,020,945 
Cash......................................................          25,567 
Receivable for: 
  Shares of beneficial interest sold .....................       5,630,771 
  Dividends...............................................         637,467 
Deferred organizational expenses .........................          45,271 
Prepaid expenses and other assets ........................             980 
                                                           ---------------
  TOTAL ASSETS ...........................................     437,361,001 
                                                           ---------------
LIABILITIES: 
Payable for: 
  Shares of beneficial interest repurchased...............         855,292 
  Plan of distribution fee ...............................         300,567 
  Investment management fee ..............................          57,587 
  Variation margin on futures contracts ..................           8,150 
Organizational expenses ..................................          49,500 
Accrued expenses and other payables ......................         160,925 
                                                           ---------------
  TOTAL LIABILITIES ......................................       1,432,021 
                                                           ---------------
  NET ASSETS..............................................    $435,928,980 
                                                           ===============
COMPOSITION OF NET ASSETS: 
Paid-in-capital...........................................    $397,807,150 
Net unrealized appreciation ..............................      38,103,206 
Undistributed net investment income.......................         219,833 
Net realized loss ........................................        (201,209) 
                                                           ---------------
  NET ASSETS..............................................    $435,928,980 
                                                           ===============
CLASS A SHARES: 
Net Assets................................................     $19,088,917 
Shares Outstanding (unlimited authorized, $.01 par value)        1,716,869 
  NET ASSET VALUE PER SHARE...............................          $11.12 
                                                                    ====== 
  MAXIMUM OFFERING PRICE PER SHARE, 
   (net asset value plus 5.54% of net asset value) .......          $11.74 
                                                                    ====== 
CLASS B SHARES: 
Net Assets................................................    $380,009,145 
Shares Outstanding (unlimited authorized, $.01 par value)       34,233,805 
  NET ASSET VALUE PER SHARE ..............................          $11.10 
                                                                    ====== 
CLASS C SHARES: 
Net Assets................................................     $24,126,224 
Shares Outstanding (unlimited authorized, $.01 par value)        2,173,252 
  NET ASSET VALUE PER SHARE ..............................          $11.10 
                                                                    ======
CLASS D SHARES: 
Net Assets................................................     $12,704,694 
Shares Outstanding (unlimited authorized, $.01 par value)        1,142,033 
  NET ASSET VALUE PER SHARE ..............................          $11.12 
                                                                    ======
</TABLE>

                      SEE NOTES TO FINANCIAL STATEMENTS 

                               39           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
FINANCIAL STATEMENTS, continued 

STATEMENT OF OPERATIONS 
For the period September 26, 1997* through February 28, 1998 (unaudited) 

   
<TABLE>
<CAPTION>
<S>                                                <C>
 NET INVESTMENT INCOME: 
INCOME 
Dividends (net of $3,216 foreign withholding 
 tax).............................................   $ 1,967,904 
Dividends from affiliate (Note 4).................         7,287 
Interest .........................................       398,787 
                                                   ------------- 
  TOTAL INCOME ...................................     2,373,978 
                                                   ------------- 
EXPENSES 
Plan of distribution fee (Class A shares)  .......        12,848 
Plan of distribution fee (Class B shares)  .......     1,127,620 
Plan of distribution fee (Class C shares) ........        75,709 
Investment management fee.........................       510,357 
Registration fees ................................       136,736 
Transfer agent fees and expenses..................       117,693 
Custodian fees....................................        38,277 
Professional fees ................................        17,577 
S&P license fees .................................        12,759 
Shareholder reports and notices ..................         6,426 
Trustees' fees and expenses.......................         6,145 
Organizational expenses ..........................         4,229 
                                                   ------------- 
  TOTAL EXPENSES..................................     2,066,376 
Less: amounts waived/reimbursed...................      (212,252) 
                                                   ------------- 
  NET EXPENSES ...................................     1,854,124 
                                                   ------------- 
  NET INVESTMENT INCOME...........................       519,854 
                                                   ------------- 
NET REALIZED AND UNREALIZED GAIN (LOSS): 
Net realized loss on: 
  Investments ....................................       (67,320) 
  Futures contracts...............................      (133,889) 
                                                   ------------- 
  NET LOSS........................................      (201,209) 
                                                   ------------- 
Net unrealized appreciation on: 
  Investments ....................................    37,964,938 
  Futures contracts...............................       138,268 
                                                   ------------- 
  NET GAIN........................................    38,103,206 
                                                   ------------- 
NET INCREASE......................................   $38,421,851 
                                                   =============
</TABLE>
    
- ------------ 
* Commencement of operations. 

                      SEE NOTES TO FINANCIAL STATEMENTS 

                               40           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
FINANCIAL STATEMENTS, continued 

STATEMENT OF CHANGES IN NET ASSETS 

<TABLE>
<CAPTION>
                                                                    FOR THE PERIOD 
                                                                 SEPTEMBER 26, 1997* 
                                                                       THROUGH 
                                                                  FEBRUARY 28, 1998 
- ---------------------------------------------------------------  ------------------- 
                                                                     (unaudited) 
<S>                                                              <C>
INCREASE (DECREASE) IN NET ASSETS: 
OPERATIONS: 
Net investment income ..........................................     $    519,854 
Net realized loss...............................................         (201,209) 
Net unrealized appreciation.....................................       38,103,206 
                                                                 ------------------- 
  NET INCREASE .................................................       38,421,851 
                                                                 ------------------- 
DIVIDENDS TO SHAREHOLDERS FROM NET INVESTMENT INCOME: 
Class A shares..................................................          (32,194) 
Class B shares..................................................         (218,935) 
Class C shares..................................................          (12,314) 
Class D shares..................................................          (36,578) 
                                                                 ------------------- 
  TOTAL DIVIDENDS  .............................................         (300,021) 
                                                                 ------------------- 
Net increase from transactions in shares of beneficial interest       397,707,150 
                                                                 ------------------- 
  NET INCREASE .................................................      435,828,980 
NET ASSETS: 
Beginning of period.............................................          100,000 
                                                                 ------------------- 
  END OF PERIOD 
  (Including undistributed net investment income of $219,833) ..     $435,928,980 
                                                                 =================== 
</TABLE>

- ------------ 
* Commencement of operations. 

                      SEE NOTES TO FINANCIAL STATEMENTS 

                               41           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
NOTES TO FINANCIAL STATEMENTS February 28, 1998 (unaudited) 

1. ORGANIZATION AND ACCOUNTING POLICIES 

Dean Witter S&P 500 Index Fund (the "Fund") is registered under the 
Investment Company Act of 1940, as amended (the "Act"), as a diversified, 
open-end management investment company. The Fund's investment objective is to 
provide investment results that, before expenses, correspond to the total 
return of the Standard & Poor's 500 Composite Stock Price Index (the "S&P 500 
Index"). The Fund seeks to achieve its objective by investing at least 80% of 
its total assets in common stocks included in the S&P 500 Index in 
approximately the same weighting as the Index. The Fund was organized as a 
Massachusetts business trust on June 18, 1997 and had no other operations 
other than those relating to organizational matters and the issuance of 2,500 
shares of beneficial interest by each class for $25,000 of each class to Dean 
Witter InterCapital Inc. (the "Investment Manager") to effect the Fund's 
initial capitalization. The Fund commenced operations on September 26, 1997. 

The Fund offers Class A shares, Class B shares, Class C shares and Class D 
shares. The four classes are substantially the same except that most Class A 
shares are subject to a sales charge imposed at the time of purchase, some 
Class A shares, and most Class B shares and Class C shares are subject to a 
contingent deferred sales charge imposed on shares redeemed within one year, 
six years and one year, respectively. Class D shares are not subject to a 
sales charge. Additionally, Class A shares, Class B shares and Class C shares 
incur distribution expenses. 

The preparation of financial statements in accordance with generally accepted 
accounting principles requires management to make estimates and assumptions 
that affect the reported amounts and disclosures. Actual results could differ 
from those estimates. 

The following is a summary of significant accounting policies: 

A. VALUATION OF INVESTMENTS -- (1) an equity security listed or traded on the 
New York, American or other domestic or foreign stock exchange is valued at 
its latest sale price on that exchange prior to the time when assets are 
valued; if there were no sales that day, the security is valued at the latest 
bid price (in cases where 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 available bid price prior to the time of valuation; (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 Trustees; and (4) short-term debt 
securities having a maturity date of more than sixty days at time of 

                               42           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
NOTES TO FINANCIAL STATEMENTS February 28, 1998 (unaudited) continued 

purchase are valued on a mark-to-market basis until sixty days prior to 
maturity and thereafter at amortized cost based on their value on the 61st 
day. Short-term debt securities having a maturity date of sixty days or less 
at the time of purchase are valued at amortized cost. 

B. ACCOUNTING FOR INVESTMENTS -- Security transactions are accounted for on 
the trade date (date the order to buy or sell is executed). Realized gains 
and losses on security transactions are determined by the identified cost 
method. Dividend income and other distributions are recorded on the 
ex-dividend date. Discounts are accreted over the respective life of the 
securities. Interest income is accrued daily. 

C. MULTIPLE CLASS ALLOCATIONS -- Investment income, expenses (other than 
distribution fees), and realized and unrealized gains and losses are 
allocated to each class of shares based upon the relative net asset value on 
the date such items are recognized. Distribution fees are charged directly to 
the respective class. 

D. FEDERAL INCOME TAX STATUS -- It is the Fund's policy to comply with the 
requirements of the Internal Revenue Code applicable to regulated investment 
companies and to distribute all of its taxable income to its shareholders. 
Accordingly, no federal income tax provision is required. 

E. DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS -- The Fund records dividends 
and distributions to its shareholders on the ex-dividend date. The amount of 
dividends and distributions from net investment income and net realized 
capital gains are determined in accordance with federal income tax 
regulations which may differ from generally accepted accounting principles. 
These "book/tax" differences are either considered temporary or permanent in 
nature. To the extent these differences are permanent in nature, such amounts 
are reclassified within the capital accounts based on their federal tax-basis 
treatment; temporary differences do not require reclassification. Dividends 
and distributions which exceed net investment income and net realized capital 
gains for financial reporting purposes but not for tax purposes are reported 
as dividends in excess of net investment income or distributions in excess of 
net realized capital gains. To the extent they exceed net investment income 
and net realized capital gains for tax purposes, they are reported as 
distributions of paid-in-capital. 

F. ORGANIZATIONAL EXPENSES -- The Investment Manager incurred the 
organizational expenses of the Fund in the amount of approximately $49,500 
which will be reimbursed for the full amount thereof. Such expenses have been 
deferred and are being amortized on the straight-line method over a period 
not to exceed five years from the commencement of operations. 

                               43           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
NOTES TO FINANCIAL STATEMENTS February 28, 1998 (unaudited) continued 

2. INVESTMENT MANAGEMENT AGREEMENT 

Pursuant to an Investment Management Agreement, the Fund pays the Investment 
Manager a management fee, accrued daily and payable monthly, by applying the 
annual rate of 0.40% to the net assets of the Fund determined as of the close 
of each business day. 

Under the terms of the Agreement, in addition to managing the Fund's 
investments, the Investment Manager maintains certain of the Fund's books and 
records and furnishes, at its own expense, office space, facilities, 
equipment, clerical, bookkeeping and certain legal services and pays the 
salaries of all personnel, including officers of the Fund who are employees 
of the Investment Manager. The Investment Manager also bears the cost of 
telephone services, heat, light, power and other utilities provided to the 
Fund. 

   
The Investment Manager has agreed to assume all operating expenses (except 
for 12b-1 fees) and to waive the compensation provided for in its Investment 
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. 
    

3. PLAN OF DISTRIBUTION 

   
Shares of the Fund are distributed by Dean Witter Distributors Inc. (the 
"Distributor"), an affiliate of the Investment Manager. The Fund has adopted 
a Plan of Distribution (the "Plan") pursuant to Rule 12b-1 under the Act. The 
Plan provides that the Fund will pay the Distributor a fee which is accrued 
daily and paid monthly at the following annual rates: (i) Class A -up to 
0.25% of the average daily net assets of Class A; (ii) Class B -1.0% of the 
average daily net assets of Class B; and (iii) Class C -up to 1.0% of the 
average daily net assets of Class C. In the case of Class A shares, amounts 
paid under the Plan are paid to the Distributor for services provided. In the 
case of Class B and Class C shares, amounts paid under the Plan are paid to 
the Distributor for services provided and the expenses borne by it and others 
in the distribution of the shares of these Classes, including the payment of 
commissions for sales of these Classes and incentive compensation to, and 
expenses of, the account executives of Dean Witter Reynolds Inc. ("DWR"), an 
affiliate of the Investment Manager and Distributor, and others who engage in 
or support distribution of the shares or who service shareholder accounts, 
including overhead and telephone expenses; printing and distribution of 
prospectuses and reports used in connection with the offering of these shares 
to other than current shareholders; and preparation, printing and 
distribution of sales literature and advertising materials. In addition, the 
Distributor may utilize fees paid pursuant to the Plan, 
    

                               44           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
NOTES TO FINANCIAL STATEMENTS February 28, 1998 (unaudited) continued 

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, provided that the Plan continues in effect, 
any cumulative expenses incurred by the Distributor but not yet recovered may 
be recovered through the payment of future distribution fees from the Fund 
pursuant to the Plan and contingent deferred sales charges paid by investors 
upon redemption of Class B shares. Although there is no legal obligation for 
the Fund to pay expenses incurred in excess of payments made to the 
Distributor under the Plan and the proceeds of contingent deferred sales 
charges paid by investors upon redemption of shares, if for any reason the 
Plan is terminated, the Trustees will consider at that time the manner in 
which to treat such expenses. The Distributor has advised the Fund that such 
excess amounts, including carrying charges, totaled $15,470,964 at February 
28, 1998. 

In the case of Class A shares and Class C shares, expenses incurred pursuant 
to the Plan in any calendar year in excess of 0.25% or 1.0% of the average 
daily net assets of Class A or Class C, respectively, will not be reimbursed 
by the Fund through payments in any subsequent year, except that expenses 
representing a gross sales credit to account executives may be reimbursed in 
the subsequent calendar year. For the period ended February 28, 1998, the 
distribution fee was accrued for Class A shares and Class C shares at the 
annual rate of 0.24% and 1.0%, respectively. 

The Distributor has informed the Fund that for the period ended February 28, 
1998, it received contingent deferred sales charges from certain redemptions 
of the Fund's Class A shares, Class B shares and Class C shares of $1,233, 
$176,043 and $2,465, respectively and received $317,745 in front-end sales 
charges from sales of the Fund's Class A shares. The respective shareholders 
pay such charges which are not an expense of the Fund. 

4. SECURITY TRANSACTIONS AND TRANSACTIONS WITH AFFILIATES 

The cost of purchases and proceeds from sales of portfolio securities, 
excluding short-term investments, for the period ended February 28, 1998 
aggregated $391,998,552 and $1,790,565, respectively. Included in the 
aforementioned are purchases of U.S. Government securities of $4,238,575, and 
purchases of Morgan Stanley, Dean Witter, Discover & Co. common stock of 
$1,744,549. 

                               45           
<PAGE>
DEAN WITTER S&P 500 INDEX FUND 
NOTES TO FINANCIAL STATEMENTS February 28, 1998 (unaudited) continued 

5. SHARES OF BENEFICIAL INTEREST 

Transactions in shares of beneficial interest were as follows: 

<TABLE>
<CAPTION>
                                  FOR THE PERIOD 
                                SEPTEMBER 26, 1997* 
                                      THROUGH 
                                 FEBRUARY 28, 1998 
                           ----------------------------- 
                               SHARES         AMOUNT 
                           ------------- -------------- 
<S>                        <C>           <C>
CLASS A 
Sold......................    2,174,952    $ 22,337,813 
Reinvestment of 
 dividends................        2,992          30,640 
Redeemed..................     (463,575)     (4,833,628) 
                           ------------- -------------- 
Net increase -Class A ....    1,714,369      17,534,825 
                           ------------- -------------- 
CLASS B 
Sold......................   35,877,610     363,073,563 
Reinvestment of 
 dividends................       19,650         201,230 
Redeemed..................   (1,665,955)    (17,145,091) 
                           ------------- -------------- 
Net increase -Class B ....   34,231,305     346,129,702 
                           ------------- -------------- 
CLASS C 
Sold......................    2,361,111      23,865,804 
Reinvestment of 
 dividends................        1,135          11,618 
Redeemed..................     (191,494)     (1,986,049) 
                           ------------- -------------- 
Net increase -Class C ....    2,170,752      21,891,373 
                           ------------- -------------- 
CLASS D 
Sold......................    2,170,273      22,597,466 
Reinvestment of 
 dividends................          189           1,939 
Redeemed..................   (1,030,929)    (10,448,155) 
                           ------------- -------------- 
Net increase -Class D ....    1,139,533      12,151,250 
                           ------------- -------------- 
Net increase in Fund .....   39,255,959    $397,707,150 
                           ============= ============== 
</TABLE>

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

*     Commencement of operations. 

6. FINANCIAL HIGHLIGHTS 

See the "Financial Highlights" table on page 6 of this prospectus. 

<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 
Wayne E. Hedien 
Dr. Manuel H. Johnson 
Michael E. Nugent 
Philip J. Purcell 
John L. Schroeder 

OFFICERS 
Charles A. Fiumefreddo 
Chairman and Chief Executive Officer 
Barry Fink 
Vice President, Secretary and 
General Counsel 
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 
Morgan Stanley 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 -- MARCH 31, 1998 
    

<PAGE>

STATEMENT OF ADDITIONAL INFORMATION                        DEAN WITTER 
March 31, 1998                                             S&P 500 INDEX FUND 
- ----------------------------------------------------------------------------- 

   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 S&P 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 equity securities included in the S&P 500 
Index in approximately the same weightings as the Index. (See "Investment 
Practices and Policies.") 

   A Prospectus for the Fund dated March 31, 1998, which provides the basic 
information you should know before investing in the Fund, may be obtained 
without charge from the Fund at its address or telephone numbers listed below 
or from the Fund's Distributor, Dean Witter Distributors Inc., or from Dean 
Witter Reynolds Inc, at any of its branch offices. This Statement of 
Additional Information is not a Prospectus. It contains information in 
addition to and more detailed than that set forth in the Prospectus. It is 
intended to provide additional information regarding the activities and 
operations of the Fund, and should be read in conjunction with the 
Prospectus. 

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) 

<PAGE>

TABLE OF CONTENTS 
- ----------------------------------------------------------------------------- 
The Fund and its Management...............................................  3 
Trustees and Officers.....................................................  7 
Investment Practices and Policies......................................... 13 
Investment Restrictions................................................... 17 
Portfolio Transactions and Brokerage...................................... 18 
The Distributor........................................................... 19 
Determination of Net Asset Value ......................................... 23 
Purchase of Fund Shares .................................................. 24 
Shareholder Services...................................................... 26 
Redemptions and Repurchases............................................... 31 
Dividends, Distributions and Taxes........................................ 32 
Performance Information................................................... 33 
Shares of the Fund........................................................ 34 
Custodian and Transfer Agent ............................................. 35 
Independent Accountants................................................... 35 
Reports to Shareholders................................................... 35 
Legal Counsel............................................................. 35 
Experts .................................................................. 36 
Registration Statement.................................................... 36 
Report of Independent Accountants ........................................ 37 
Statement of Assets and Liabilities as at July 28, 1997................... 38 
                                                          
                                       2
<PAGE>

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

THE FUND 

   The Fund is a trust of the type commonly known as a "Massachusetts 
business trust" and was organized under the laws of the Commonwealth of 
Massachusetts on June 18, 1997. 

THE INVESTMENT MANAGER 

   Dean Witter InterCapital Inc. (the "Investment Manager" or 
"InterCapital"), a Delaware corporation, whose address is Two World Trade 
Center, New York, New York 10048, is the Fund's Investment Manager. 
InterCapital is a wholly-owned subsidiary of Morgan Stanley Dean Witter & Co. 
("MSDW"), a Delaware corporation. In an internal reorganization which took 
place in January, 1993, InterCapital assumed the investment advisory, 
administrative and management activities previously performed by the 
InterCapital Division of Dean Witter Reynolds Inc. ("DWR"), a broker-dealer 
affiliate of InterCapital. (As hereinafter used in this Statement of 
Additional Information, the terms "InterCapital" and "Investment Manager" 
refer to DWR's InterCapital Division prior to the internal reorganization and 
to Dean Witter InterCapital Inc. thereafter). The daily management of the 
Fund and research relating to the Fund's portfolio are conducted by or under 
the direction of officers of the Fund and of the Investment Manager, subject 
to review by the Fund's Board of Trustees. Information as to these Trustees 
and officers is contained under the caption "Trustees and Officers." 

   InterCapital is also the investment manager (or investment adviser) of the 
following investment companies: 

OPEN-END FUNDS 

 1 Active Assets California Tax-Free Trust 
 2 Active Assets Government Securities Trust 
 3 Active Assets Money Trust 
 4 Active Assets Tax-Free Trust 
 5 Dean Witter American Value Fund 
 6 Dean Witter Balanced Growth Fund 
 7 Dean Witter Balanced Income Fund 
 8 Dean Witter California Tax-Free Daily Income Trust 
 9 Dean Witter California Tax-Free Income Fund 
10 Dean Witter Capital Appreciation Fund 
11 Dean Witter Capital Growth Securities 
12 Dean Witter Convertible Securities Trust 
13 Dean Witter Developing Growth Securities Trust 
14 Dean Witter Diversified Income Trust 
15 Dean Witter Dividend Growth Securities Inc. 
16 Dean Witter European Growth Fund Inc. 
17 Dean Witter Federal Securities Trust 
18 Dean Witter Financial Services Trust 
19 Dean Witter Fund of Funds 
20 Dean Witter Global Asset Allocation Fund 
21 Dean Witter Global Dividend Growth Securities 
22 Dean Witter Global Short-Term Income Fund Inc. 
23 Dean Witter Global Utilities Fund 
24 Dean Witter Hawaii Municipal Trust 
25 Dean Witter Health Sciences Trust 
26 Dean Witter High Yield Securities Inc. 
27 Dean Witter Income Builder Fund 
28 Dean Witter Information Fund 
29 Dean Witter Intermediate Income Securities 
30 Dean Witter Intermediate Term U.S. Treasury Trust 
31 Dean Witter International SmallCap Fund 
32 Dean Witter Japan Fund 
33 Dean Witter Limited Term Municipal Trust 
34 Dean Witter Liquid Asset Fund Inc. 
35 Dean Witter Market Leader Trust 
36 Dean Witter Mid-Cap Growth Fund 
37 Dean Witter Multi-State Municipal Series Trust 
38 Dean Witter Natural Resource Development Securities Inc. 
39 Dean Witter New York Municipal Money Market Trust 
40 Dean Witter New York Tax-Free Income Fund 
41 Dean Witter Pacific Growth Fund Inc. 
42 Dean Witter Precious Metals and Minerals Trust 
43 Dean Witter Retirement Series 
44 Dean Witter Select Dimensions Investment Series 
45 Dean Witter Select Municipal Reinvestment Fund 
46 Dean Witter Short-Term Bond Fund 
47 Dean Witter Short-Term U.S. Treasury Trust 
48 Dean Witter Special Value Fund 
49 Dean Witter Strategist Fund 

                                       3
<PAGE>

50 Dean Witter Tax-Exempt Securities Trust 
51 Dean Witter Tax-Free Daily Income Trust 
52 Dean Witter U.S. Government Money Market Trust 
53 Dean Witter U.S. Government Securities Trust 
54 Dean Witter Utilities Fund 
55 Dean Witter Value-Added Market Series 
56 Dean Witter Variable Investment Series 
57 Dean Witter World Wide Income Trust 
58 Dean Witter World Wide Investment Trust 
59 Morgan Stanley Dean Witter Competitive  Edge Fund 
60 Morgan Stanley Dean Witter Growth Fund 
61 Morgan Stanley Dean Witter Mid-Cap Dividend Growth Securities 

CLOSED-END FUNDS 

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

   The foregoing investment companies, together with the Fund, are 
collectively referred to as the Dean Witter Funds. 

   In addition, Dean Witter Services Company Inc. ("DWSC"), a wholly-owned 
subsidiary of InterCapital, serves as manager for the following investment 
companies for which TCW Funds Management, Inc. is the investment adviser (the 
"TCW/DW Funds"): 

OPEN-END FUNDS 

 1 TCW/DW Emerging Markets Opportunities Trust 
 2 TCW/DW Global Telecom Trust 
 3 TCW/DW Income and Growth Fund 
 4 TCW/DW Latin American Growth Fund 
 5 TCW/DW Mid-Cap Equity Trust 
 6 TCW/DW North American Government Income Trust 
 7 TCW/DW Small Cap Growth Fund 
 8 TCW/DW Total Return Trust 

CLOSED-END FUNDS 

 1 TCW/DW Term Trust 2000 
 2 TCW/DW Term Trust 2002 
 3 TCW/DW Term Trust 2003 

   InterCapital also serves as: (i) administrator of The BlackRock Strategic 
Term Trust Inc., a closed-end investment company; (ii) sub-administrator of 
Templeton Global Governments Income Trust, a closed-end investment company; 
and (iii) investment adviser of Offshore Dividend Growth Fund and Offshore 
Money Market Fund, mutual funds established under the laws of the Cayman 
Islands and available only to investors who are participants in DWR's 
International Active Assets Account program and are neither citizens nor 
residents of the United States. 

                                       4
<PAGE>

   Pursuant to an Investment Management Agreement (the "Agreement") with the 
Investment Manager, the Fund has retained the Investment Manager to manage 
the investment of the Fund's assets, including the placing of orders for the 
purchase and sale of portfolio securities. The Investment Manager obtains and 
evaluates such information and advice relating to the economy, securities 
markets and specific securities as it considers necessary or useful to 
continuously manage the assets of the Fund in a manner consistent with its 
investment objective. 

   Under the terms of the Agreement, in addition to managing the Fund's 
investments, the Investment Manager maintains certain of the Fund's books and 
records and furnishes, at its own expense, such office space, facilities, 
equipment, clerical help and bookkeeping and certain legal services as the 
Fund may reasonably require in the conduct of its business, including the 
preparation of prospectuses, statements of additional information, proxy 
statements and reports required to be filed with federal and state securities 
commissions (except insofar as the participation or assistance of independent 
accountants and attorneys is, in the opinion of the Investment Manager, 
necessary or desirable). In addition, the Investment Manager pays the 
salaries of all personnel, including officers of the Fund, who are employees 
of the Investment Manager. The Investment Manager also bears the cost of 
telephone service, heat, light, power and other utilities provided to the 
Fund. The Investment Manager has retained DWSC to perform its administrative 
services under the Agreement. 

   Expenses not expressly assumed by the Investment Manager under the 
Agreement or by Dean Witter Distributors Inc., the Distributor of the Fund's 
shares ("Distributors" or "the Distributor") will be paid by the Fund. These 
expenses will be allocated among the four classes of shares of the Fund 
(each, a "Class") pro rata based on the net assets of the Fund attributable 
to each Class, except as described below. Such expenses include, but are not 
limited to: expenses of the Plan of Distribution pursuant to Rule 12b-1 (the 
"12b-1 fee") (see "The Distributor"); charges and expenses of any registrar; 
custodian, stock transfer and dividend disbursing agent; brokerage 
commissions; taxes; engraving and printing of share certificates; 
registration costs of the Fund and its shares under federal and state 
securities laws; the cost and expense of printing, including typesetting, and 
distributing Prospectuses and Statements of Additional Information of the 
Fund and supplements thereto to the Fund's shareholders; all expenses of 
shareholders' and Trustees' meetings and of preparing, printing and mailing 
of proxy statements and reports to shareholders; fees and travel expenses of 
Trustees or members of any advisory board or committee who are not employees 
of the Investment Manager or any corporate affiliate of the Investment 
Manager; all expenses incident to any dividend, withdrawal or redemption 
options; charges and expenses of any outside service used for pricing of the 
Fund's shares; fees and expenses of legal counsel, including counsel to the 
Trustees who are not interested persons of the Fund or of the Investment 
Manager (not including compensation or expenses of attorneys who are 
employees of the Investment Manager) and independent accountants; membership 
dues of industry associations; interest on Fund borrowings; postage; 
insurance premiums on property or personnel (including officers and Trustees) 
of the Fund which inure to its benefit; extraordinary expenses (including, 
but not limited to, legal claims and liabilities and litigation costs and any 
indemnification relating thereto); and all other costs of the Fund's 
operation. The 12b-1 fees relating to a particular Class will be allocated 
directly to that Class. In addition, other expenses associated with a 
particular Class (except advisory or custodial fees) may be allocated 
directly to that Class, provided that such expenses are reasonably identified 
as specifically attributable to that Class and the direct allocation to that 
Class is approved by the Trustees. 

   As full compensation for the services and facilities furnished to the Fund 
and expenses of the Fund assumed by the Investment Manager, the Fund pays the 
Investment Manager monthly compensation calculated daily by applying the 
annual rate of 0.40% to the Fund's daily net assets. The management fee is 
allocated among the Classes pro rata based on the net assets of the Fund 
attributable to each Class. The 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. During the period September 26, 1997 (commencement of operations) 
through February 28, 1998, the Fund accrued total compensation to the 
Investment Manager under the Management Agreement in the amount of $510,357, 
$212,252 of which was waived by the Investment Manager pursuant to the 
undertaking described above. 

                                       5
<PAGE>

   The Agreement provides that in the absence of willful misfeasance, bad 
faith, gross negligence or reckless disregard of its obligations thereunder, 
the Investment Manager is not liable to the Fund or any of its investors for 
any act or omission by the Investment Manager or for any losses sustained by 
the Fund or its investors. The Agreement in no way restricts the Investment 
Manager from acting as investment manager or adviser to others. 

   The Investment Manager paid the organizational expenses of the Fund 
incurred prior to the offering of the Fund's shares. The Fund has agreed to 
bear and reimburse the Investment Manager for such expenses, which totalled 
approximately $49,500. The organizational expenses of the Fund are being 
deferred by the Fund and are being amortized on the straight line method over 
a period not to exceed five years from the date of commencement of the Fund's 
operations. 

   The Agreement was initially approved by the Trustees on July 23, 1997 and 
by InterCapital, as the then sole shareholder, on July 28, 1997. The 
Agreement may be terminated at any time, without penalty, on thirty days' 
notice by the Trustees of the Fund, by the holders of a majority of the 
outstanding shares of the Fund, as defined in the Investment Company Act of 
1940, as amended (the "Act"), or by the Investment Manager. The Agreement 
will automatically terminate in the event of its assignment (as defined in 
the Act). 

   Under its terms, the Agreement has an initial term ending April 30, 1999 
and will continue from year to year thereafter, provided continuance of the 
Agreement is approved at least annually by the vote of the holders of a 
majority of the outstanding shares of the Fund, as defined in the Act, or by 
the Trustees of the Fund; provided that in either event such continuance is 
approved annually by the vote of a majority of the Trustees of the Fund who 
are not parties to the Agreement or "interested persons" (as defined in the 
Act) of any such party (the "Independent Trustees"), which vote must be cast 
in person at a meeting called for the purpose of voting on such approval. 

   
   The following persons owned 5% or more of the outstanding shares of Class 
A on February 27, 1998: Morgan Stanley Dean Witter Trust FSB Trustee, 
Ashcraft & Gerel Target Benefit Plan, P.O. Box 957, Jersey City, NJ 
07303--11.619%; RPM007 Stark Co Women's Clinic, Retirement Savings Plan, Main 
Holding FD #6, Attn: B. Kindig, 5000 Higbee Avenue NW, Canton, OH 
44718--11.361%; RPM007 Tri Co Orthopedic Surgeons Retirement Savings Plan, 
Mutual Fund-Portfolio #6, 1413 Harbor Drive NW, Canton, OH 44708--10.132%; 
and Dave Sorenson & Marsha Sorensen JTTEN, 2625 W. Lake Van Ness Circle, 
Fresno, CA 93711--5.768%. The following persons owned 5% or more of the 
outstanding shares of Class D on February 27, 1998: Morgan Stanley Dean 
Witter Trust FSB Trustee, Pizzagalli Construction, P.O. Box 957, Jersey City, 
NJ 07303--81.330% and Hare & Co., c/o The Bank of New York, P.O. Box 11203, 
New York, NY 10286--8.692%. 
    

   The Fund has acknowledged that the name "Dean Witter" is a property right 
of DWR. The Fund has agreed that DWR or its parent company may use or, at any 
time, permit others to use, the name "Dean Witter." The Fund has also agreed 
that in the event the Agreement is terminated, or if the affiliation between 
InterCapital and its parent company is terminated, the Fund will eliminate 
the name "Dean Witter" from its name if DWR or its parent company shall so 
request. 

                                       6
<PAGE>

TRUSTEES AND OFFICERS 
- ----------------------------------------------------------------------------- 

   The Trustees and Executive Officers of the Fund, their principal business 
occupations during the last five years and their affiliations, if any, with 
InterCapital, and with the 86 Dean Witter Funds and the 11 TCW/DW Funds are 
shown below: 

<TABLE>
<CAPTION>
  NAME, AGE, POSITION WITH FUND AND ADDRESS         PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS 
- --------------------------------------------  -------------------------------------------------------- 
<S>                                           <C>
Michael Bozic (57)..........................  Chairman and Chief Executive Officer of Levitz Furniture 
Trustee                                       (since November, 1995); Director or Trustee of the Dean 
c/o Levitz Furniture Corporation              Witter Funds; formerly President and Chief Executive 
7887 N. Federal Highway                       Officer of Hills Department Stores (May, 1991-July, 
Boca Raton, Florida                           1995); formerly variously Chairman, Chief Executive 
                                              Officer, President and Chief Operating Officer 
                                              (1987-1991) of the Sears Merchandise Group of Sears, 
                                              Roebuck and Co.; Director of Eaglemark Financial 
                                              Services, Inc., The United Negro College Fund and 
                                              Weirton Steel Corporation. 

Charles A. Fiumefreddo* (64)................  Chairman, Chief Executive Officer and Director of 
Chairman, President,                          InterCapital, Distributors and DWSC; Executive Vice 
Chief Executive Officer and Trustee           President and Director of DWR; Chairman, Director or 
Two World Trade Center                        Trustee, President and Chief Executive Officer of the 
New York, New York                            Dean Witter Funds; Chairman, Chief Executive Officer and 
                                              Trustee of the TCW/DW Funds; Chairman and Director of 
                                              Morgan Stanley Dean Witter Trust FSB ("MSDW Trust"); 
                                              Director and/or officer of various MSDW subsidiaries. 

Edwin J. Garn (65)..........................  Director or Trustee of the Dean Witter Funds; formerly 
Trustee                                       United States Senator (R-Utah)(1974-1992) and Chairman, 
c/o Huntsman Corporation                      Senate Banking Committee (1980-1986); formerly Mayor of 
500 Huntsman Way                              Salt Lake City, Utah (1972-1974); formerly Astronaut, 
Salt Lake City, Utah                          Space Shuttle Discovery (April 12-19, 1985); Vice 
                                              Chairman, Huntsman Corporation; Director of Franklin 
                                              Covey (time management systems); John Alden Financial 
                                              Corp. (health insurance); United Space Alliance (joint 
                                              venture between Lockheed Martin and Boeing Company) and 
                                              Nuskin Asia Pacific (multilevel marketing); member of 
                                              the board of various civic and charitable organizations. 

John R. Haire (73)..........................  Chairman of the Audit Committee and Chairman of the 
Trustee                                       Committee of the Independent Directors or Trustees and 
Two World Trade Center                        Director or Trustee of the Dean Witter Funds; Chairman 
New York, New York                            of the Audit Committee and Chairman of the Committee of 
                                              the Independent Trustees and Trustee of the TCW/DW 
                                              Funds; formerly President, Council for Aid to Education 
                                              (1978-1989) and Chairman and Chief Executive Officer of 
                                              Anchor Corporation, an Investment Adviser (1964-1978). 

                                       7
<PAGE>

  NAME, AGE, POSITION WITH FUND AND ADDRESS         PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS 
- --------------------------------------------  -------------------------------------------------------- 

Wayne E. Hedien (64) .......................  Retired; Director or Trustee of the Dean Witter Funds; 
Trustee                                       Director of The PMI Group, Inc. (private mortgage 
c/o Gordon Altman Butowsky                    insurance); Trustee and Vice Chairman of The Field 
 Weitzen Shalov & Wein                        Museum of Natural History; formerly associated with the 
Counsel to the Independent Trustees           Allstate Companies (1966-1994), most recently as 
114 West 47th Street                          Chairman of The Allstate Corporation (March, 
New York, New York                            1993-December, 1994) and Chairman and Chief Executive 
                                              Officer of its wholly-owned subsidiary, Allstate 
                                              Insurance Company (July, 1989-December, 1994); director 
                                              of various other business and charitable organizations. 
   
Dr. Manuel H. Johnson (49)..................  Senior Partner, Johnson Smick International, Inc., a 
Trustee                                       consulting firm; Co-Chairman and a founder of the Group 
c/o Johnson Smick International, Inc.         of Seven Council (G7C), an international economic 
1133 Connecticut Avenue, N.W.                 commission; Director or Trustee of the Dean Witter 
Washington, DC                                Funds; Trustee of the TCW/DW Funds; Director of NASDAQ 
                                              (since June, 1995); Director of Greenwich Capital 
                                              Markets, Inc. (broker-dealer) and NVR Inc. (home 
                                              construction); Chairman and Trustee of the Financial
                                              Accounting Foundation (oversight organization for the 
                                              FASB); formerly Vice Chairman of the Board of Governors
                                              of the Federal Reserve System (1986-1990) and Assistant
                                              Secretary of the U.S. Treasury (1982-1986). 
    
Michael E. Nugent (61)......................  General Partner, Triumph Capital, L.P., a private 
Trustee                                       investment partnership; Director or Trustee of the Dean 
c/o Triumph Capital, L.P.                     Witter Funds; Trustee of the TCW/DW Funds; formerly Vice 
237 Park Avenue                               President, Bankers Trust Company and BT Capital 
New York, New York                            Corporation (1984-1988); Director of various business 
                                              organizations. 

Philip J. Purcell* (54).....................  Chairman of the Board of Directors and Chief Executive 
Trustee                                       Officer of MSDW, DWR and Novus Credit Services Inc.; 
1585 Broadway                                 Director of InterCapital, DWSC and Distributors; 
New York, New York                            Director or Trustee of the Dean Witter Funds; Director 
                                              and/or officer of various MSDW subsidiaries. 

John L. Schroeder (67)......................  Retired; Director or Trustee of the Dean Witter Funds; 
Trustee                                       Trustee of the TCW/DW Funds; Director of Citizens 
c/o Gordon Altman Butowsky                    Utilities Company; formerly Executive Vice President and 
 Weitzen Shalov & Wein                        Chief Investment Officer of the Home Insurance Company 
Counsel to the Independent Trustees           (August, 1991-Septem ber, 1995). 
114 West 47th Street 
New York, New York 

                                       8
<PAGE>

  NAME, AGE, POSITION WITH FUND AND ADDRESS         PRINCIPAL OCCUPATIONS DURING LAST FIVE YEARS 
- --------------------------------------------  -------------------------------------------------------- 

Barry Fink (43).............................  Senior Vice President (since March, 1997) and Secretary 
Vice President,                               and General Counsel (since February, 1997) of 
Secretary and General Counsel                 InterCapital and DWSC; Senior Vice President (since 
Two World Trade Center                        March, 1997) and Assistant Secretary and Assistant 
New York, New York                            General Counsel (since February, 1997) of Distributors; 
                                              Assistant Secretary of DWR (since August, 1996); Vice 
                                              President, Secretary and General Counsel of the Dean 
                                              Witter Funds and the TCW/DW Funds (since February, 
                                              1997); previously First Vice President (June, 
                                              1993-February, 1997); Vice President (until June, 1993) 
                                              and Assistant Secretary and Assistant General Counsel of 
                                              InterCapital and DWSC and Assistant Secretary of the 
                                              Dean Witter Funds and the TCW/DW Funds. 

Kenton J. Hinchliffe (53)..................   Senior Vice President of InterCapital; Vice President of 
Vice President                                various Dean Witter Funds. 
Two World Trade Center 
New York, New York 

Thomas F. Caloia (52) .....................   First Vice President and Assistant Treasurer of 
Treasurer                                     InterCapital and DWSC; Treasurer of the Dean Witter 
Two World Trade Center                        Funds and the TCW/DW Funds. 
New York, New York

</TABLE>

- ------------ 
* Denotes Trustees who are "interested persons" of the Fund, as defined in 
  the Act. 

   In addition, Mitchell M. Merin, President and Chief Strategic Officer of 
InterCapital and DWSC, Executive Vice President of Distributors and MSDW 
Trust and Director of MSDW Trust, Executive Vice President and Director of 
DWR, and Director of SPS Transaction Services, Inc. and various other MSDW 
subsidiaries, Robert M. Scanlan, President and Chief Operating Officer of 
InterCapital and DWSC, Executive Vice President of Distributors and MSDW 
Trust and Director of MSDW Trust, Joseph J. McAlinden, Executive Vice 
President and Chief Investment Officer of InterCapital and Director of MSDW 
Trust, Robert S. Giambrone, Senior Vice President of InterCapital, DWSC, 
Distributors and MSDW Trust and Director of MSDW Trust, and Paul D. Vance, 
Peter Hermann, Mark Bavoso and Ira Ross, Senior Vice Presidents of 
InterCapital, are Vice Presidents of the Fund. In addition, Marilyn K. 
Cranney, First Vice President and Assistant General Counsel of InterCapital 
and DWSC, Lou Anne D. McInnis, Ruth Rossi and Carsten Otto, Vice Presidents 
and Assistant General Counsels of InterCapital and DWSC, and Frank 
Bruttomesso and Todd Lebo, staff attorneys with InterCapital, are Assistant 
Secretaries of the Fund. 

THE BOARD OF TRUSTEES, THE INDEPENDENT TRUSTEES, AND THE COMMITTEES 

   The Board of Trustees consists of nine (9) trustees. These same 
individuals also serve as directors or trustees for all of the Dean Witter 
Funds, and are referred to in this section as Trustees. As of the date of 
this Statement of Additional Information, there are a total of 86 Dean Witter 
Funds, comprised of 130 portfolios. As of February 28, 1998, the Dean Witter 
Funds had total net assets of approximately $101 billion and more than six 
million shareholders. 

   Seven Trustees (77% of the total number) have no affiliation or business 
connection with InterCapital or any of its affiliated persons and do not own 
any stock or other securities issued by InterCapital's parent company, MSDW. 
These are the "disinterested" or "independent" Trustees. The other two 
Trustees (the "management Trustees") are affiliated with InterCapital. Four 
of the seven independent Trustees are also Independent Trustees of the TCW/DW 
Funds. 

                                       9
<PAGE>

   Law and regulation establish both general guidelines and specific duties 
for the Independent Trustees. The Dean Witter Funds seek as Independent 
Trustees individuals of distinction and experience in business and finance, 
government service or academia; these are people whose advice and counsel are 
in demand by others and for whom there is often competition. To accept a 
position on the Funds' Boards, such individuals may reject other attractive 
assignments because the Funds make substantial demands on their time. Indeed, 
by serving on the Funds' Boards, certain Trustees who would otherwise be 
qualified and in demand to serve on bank boards would be prohibited by law 
from doing so. 

   All of the Independent Trustees serve as members of the Audit Committee 
and the Committee of the Independent Trustees. Three of them also serve as 
members of the Derivatives Committee. During the calendar year ended December 
31, 1997, the three Committees held a combined total of seventeen meetings. 
The Committees hold some meetings at InterCapital's offices and some outside 
InterCapital. Management Trustees or officers do not attend these meetings 
unless they are invited for purposes of furnishing information or making a 
report. 

   The Committee of the Independent Trustees is charged with recommending to 
the full Board approval of management, advisory and administration contracts, 
Rule 12b-1 plans and distribution and underwriting agreements; continually 
reviewing Fund performance; checking on the pricing of portfolio securities, 
brokerage commissions, transfer agent costs and performance, and trading 
among Funds in the same complex; and approving fidelity bond and related 
insurance coverage and allocations, as well as other matters that arise from 
time to time. The Independent Trustees are required to select and nominate 
individuals to fill any Independent Trustee vacancy on the Board of any Fund 
that has a Rule 12b-1 plan of distribution. Most of the Dean Witter Funds 
have such a plan. 

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

   Finally, the Board of each Fund has formed a Derivatives Committee to 
establish parameters for and oversee the activities of the Fund with respect 
to derivative investments, if any, made by the Fund. 

DUTIES OF CHAIRMAN OF COMMITTEE OF THE INDEPENDENT TRUSTEES AND AUDIT 
COMMITTEE 

   The Chairman of the Committee of the Independent Trustees and the Audit 
Committee maintains an office at the Funds' headquarters in New York. He is 
responsible for keeping abreast of regulatory and industry developments and 
the Funds' operations and management. He screens and/or prepares written 
materials and identifies critical issues for the Independent Trustees to 
consider, develops agendas for Committee meetings, determines the type and 
amount of information that the Committees will need to form a judgment on 
various issues, and arranges to have that information furnished to Committee 
members. He also arranges for the services of independent experts and 
consults with them in advance of meetings to help refine reports and to focus 
on critical issues. Members of the Committees believe that the person who 
serves as Chairman of both Committees and guides their efforts is pivotal to 
the effective functioning of the Committees. 

   The Chairman of the Committees also maintains continuous contact with the 
Funds' management, with independent counsel to the Independent Trustees and 
with the Funds' independent auditors. He arranges for a series of special 
meetings involving the annual review of investment advisory, management and 
other operating contracts of the Funds and, on behalf of the Committees, 
conducts negotiations with the Investment Manager and other service 
providers. In effect, the Chairman of the Committees serves as a combination 
of chief executive and support staff of the Independent Trustees. 

   The Chairman of the Committee of the Independent Trustees and the Audit 
Committee is not employed by any other organization and devotes his time 
primarily to the services he performs as 

                                       10
<PAGE>

Committee Chairman and Independent Trustee of the Dean Witter Funds and as an 
Independent Trustee and as Chairman of the Committee of the Independent 
Trustees and the Audit Committee of the TCW/DW Funds. The current Committee 
Chairman has had more than 35 years experience as a senior executive in the 
investment company industry. 

ADVANTAGES OF HAVING SAME INDIVIDUALS AS INDEPENDENT TRUSTEES FOR ALL DEAN 
WITTER FUNDS 

   The Independent Trustees and the Funds' management believe that having the 
same Independent Trustees for each of the Dean Witter Funds avoids the 
duplication of effort that would arise from having different groups of 
individuals serving as Independent Trustees for each of the Funds or even of 
sub-groups of Funds. They believe that having the same individuals serve as 
Independent Trustees of all the Funds tends to increase their knowledge and 
expertise regarding matters which affect the Fund complex generally and 
enhances their ability to negotiate on behalf of each Fund with the Fund's 
service providers. This arrangement also precludes the possibility of 
separate groups of Independent Trustees arriving at conflicting decisions 
regarding operations and management of the Funds and avoids the cost and 
confusion that would likely ensue. Finally, having the same Independent 
Trustees serve on all Fund Boards enhances the ability of each Fund to 
obtain, at modest cost to each separate Fund, the services of Independent 
Trustees, and a Chairman of their Committees, of the caliber, experience and 
business acumen of the individuals who serve as Independent Trustees of the 
Dean Witter Funds. 

COMPENSATION OF INDEPENDENT TRUSTEES 

   The Fund pays each Independent Trustee an annual fee of $800 plus a per 
meeting fee of $50 for meetings of the Board of Trustees or committees of the 
Board of Trustees attended by the Trustee (the Fund pays the Chairman of the 
Audit Committee an annual fee of $750 and pays the Chairman of the Committee 
of the Independent Trustees an additional annual fee of $1,200). If a Board 
meeting and a Committee meeting, or more than one Committee meeting, take 
place on a single day, the Trustees are paid a single meeting fee by the 
Fund. The Fund also reimburses such Trustees for travel and other 
out-of-pocket expenses incurred by them in connection with attending such 
meetings. Trustees and officers of the Fund who are or have been employed by 
the Investment Manager or an affiliated company receive no compensation or 
expense reimbursement from the Fund. 

   At such time as the Fund has been in operation, and has paid fees to the 
Independent Trustees, for a full fiscal year, and assuming that during such 
fiscal year the Fund holds the same number of Board and committee meetings as 
were held by the other Dean Witter Funds during the calendar year ended 
December 31, 1997, it is estimated that the compensation paid to each 
Independent Trustee during such fiscal year will be the amount shown in the 
following table: 

                        FUND COMPENSATION (ESTIMATED) 

<TABLE>
<CAPTION>
                                                                   AGGREGATE  
                                                                  COMPENSATION 
NAME OF INDEPENDENT TRUSTEE                                      FROM THE FUND 
- ---------------------------                                      ------------- 
<S>                                                                  <C>
Michael Bozic ..................................................     $1,600 
Edwin J. Garn ..................................................      1,600 
John R. Haire ..................................................      3,550 
Wayne E. Hedien.................................................      1,600 
Dr. Manuel H. Johnson  .........................................      1,600 
Michael E. Nugent...............................................      1,600 
John L. Schroeder...............................................      1,600 
</TABLE>                     

                                       11
<PAGE>

   The following table illustrates the compensation paid to the Fund's 
Independent Trustees for the calendar year ended December 31, 1997 for 
services to the 84 Dean Witter Funds and, in the case of Messrs. Haire, 
Johnson, Nugent and Schroeder, the 14 TCW/DW Funds that were in operation at 
December 31, 1997. With respect to Messrs. Haire, Johnson, Nugent and 
Schroeder, the TCW/DW Funds are included solely because of a limited exchange 
privilege between those Funds and five Dean Witter Money Market Funds. Mr. 
Hedien's term as Director or Trustee of each Dean Witter Fund commenced on 
September 1, 1997. 

          CASH COMPENSATION FROM DEAN WITTER FUNDS AND TCW/DW FUNDS 

<TABLE>
<CAPTION>
                                                            FOR SERVICE AS 
                                                              CHAIRMAN OF 
                                                             COMMITTEES OF    FOR SERVICE AS 
                                                              INDEPENDENT      CHAIRMAN OF 
                          FOR SERVICE                         DIRECTORS/      COMMITTEES OF      TOTAL CASH 
                         AS DIRECTOR OR    FOR SERVICE AS    TRUSTEES AND      INDEPENDENT      COMPENSATION 
                          TRUSTEE AND       TRUSTEE AND          AUDIT           TRUSTEES     FOR SERVICES TO 
                        COMMITTEE MEMBER  COMMITTEE MEMBER COMMITTEES OF 84     AND AUDIT      84 DEAN WITTER 
NAME OF                OF 84 DEAN WITTER    OF 14 TCW/DW      DEAN WITTER    COMMITTEES OF 14   FUNDS AND 14 
INDEPENDENT TRUSTEE          FUNDS             FUNDS             FUNDS         TCW/DW FUNDS     TCW/DW FUNDS 
- -------------------          -----             -----             -----         ------------     ------------ 
<S>                         <C>               <C>              <C>               <C>              <C>
Michael Bozic ........      $133,602             --               --                --            $133,602 
Edwin J. Garn ........       149,702             --               --                --             149,702 
John R. Haire ........       149,702          $73,725          $157,463          $25,350           406,240 
Wayne E. Hedien.......        39,010             --               --                --              39,010 
Dr. Manuel H. Johnson.       145,702           71,125             --                --             216,827 
Michael E. Nugent  ...       149,702           73,725             --                --             223,427 
John L. Schroeder ....       149,702           73,725             --                --             223,427 
</TABLE>

   As of the date of this Statement of Additional Information, 57 of the Dean 
Witter Funds, not including the Fund, have adopted a retirement program under 
which an Independent Trustee who retires after serving for at least five 
years (or such lesser period as may be determined by the Board) as an 
Independent Director or Trustee of any Dean Witter Fund that has adopted the 
retirement program (each such Fund referred to as an "Adopting Fund" and each 
such Trustee referred to as an "Eligible Trustee") is entitled to retirement 
payments upon reaching the eligible retirement age (normally, after attaining 
age 72). Annual payments are based upon length of service. Currently, upon 
retirement, each Eligible Trustee is entitled to receive from the Adopting 
Fund, commencing as of his or her retirement date and continuing for the 
remainder of his or her life, an annual retirement benefit (the "Regular 
Benefit") equal to 25.0% of his or her Eligible Compensation plus 0.4166666% 
of such Eligible Compensation for each full month of service as an 
Independent Director or Trustee of any Adopting Fund in excess of five years 
up to a maximum of 50.0% after ten years of service. The foregoing 
percentages may be changed by the Board.(1) "Eligible Compensation" is 
one-fifth of the total compensation earned by such Eligible Trustee for 
service to the Adopting Fund in the five year period prior to the date of the 
Eligible Trustee's retirement. Benefits under the retirement program are not 
secured or funded by the Adopting Funds. 

- --------------
(1)    An Eligible Trustee may elect alternate payments of his or her 
       retirement benefits based upon the combined life expectancy of such 
       Eligible Trustee and his or her spouse on the date of such Eligible 
       Trustee's retirement. The amount estimated to be payable under this 
       method, through the remainder of the later of the lives of such 
       Eligible Trustee and spouse, will be the actuarial equivalent of the 
       Regular Benefit. In addition, the Eligible Trustee may elect that the 
       surviving spouse's periodic payment of benefits will be equal to either 
       50% or 100% of the previous periodic amount, an election that, 
       respectively, increases or decreases the previous periodic amount so 
       that the resulting payments will be the actuarial equivalent of the 
       Regular Benefit. 

                                       12
<PAGE>

   The following table illustrates the retirement benefits accrued to the 
Fund's Independent Trustees by the 57 Dean Witter Funds (not including the 
Fund) for the year ended December 31, 1997, and the estimated retirement 
benefits for the Fund's Independent Trustees, to commence upon their 
retirement, from the 57 Dean Witter Funds as of December 31, 1997. 

                RETIREMENT BENEFITS FROM ALL DEAN WITTER FUNDS 

<TABLE>
<CAPTION>
                                                                              ESTIMATED 
                                                                RETIREMENT      ANNUAL 
                                ESTIMATED                        BENEFITS      BENEFITS 
                                 CREDITED                       ACCRUED AS       UPON 
                                  YEARS          ESTIMATED       EXPENSES     RETIREMENT 
                              OF SERVICE AT    PERCENTAGE OF      BY ALL       FROM ALL 
                                RETIREMENT       ELIGIBLE        ADOPTING      ADOPTING 
NAME OF INDEPENDENT TRUSTEE    (MAXIMUM 10)    COMPENSATION       FUNDS        FUNDS(2) 
- ---------------------------    ------------    ------------       -----        -------- 
<S>                                 <C>            <C>           <C>           <C>      
Michael Bozic ..............        10             50.0%         $ 20,499      $ 47,025 
Edwin J. Garn ..............        10             50.0            30,878        47,025 
John R. Haire ..............        10             50.0           (19,823)(3)   127,897 
Wayne E. Hedien.............         9             42.5                 0        39,971 
Dr. Manuel H. Johnson  .....        10             50.0            12,832        47,025 
Michael E. Nugent ..........        10             50.0            22,546        47,025 
John L. Schroeder...........         8             41.7            39,350        39,504 
</TABLE>

- --------------
(2)    Based on current levels of compensation. Amount of annual benefits also 
       varies depending on the Trustee's elections described in Footnote (1) 
       above. 
(3)    This number reflects the effect of the extension of Mr. Haire's term as 
       Director or Trustee until June 1, 1998. 

   As of the date of this Statement of Additional Information, the aggregate 
number of shares of beneficial interest of the Fund owned by the Fund's 
officers and Trustees as a group was less than 1 percent of the Fund's shares 
of beneficial interest outstanding. 

INVESTMENT PRACTICES AND POLICIES 
- ----------------------------------------------------------------------------- 

ADDITIONAL INFORMATION CONCERNING THE S&P 500 INDEX 

   As set forth above, the Fund's investment objective is to provide 
investment results that, before expenses, correspond to the total return of 
the S&P 500 Index. 

   The Fund is not sponsored, endorsed, sold or promoted by Standard & 
Poor's. Standard & Poor's makes no representation or warranty, express or 
implied, to the owners of shares of the Fund or any member of the public 
regarding the advisability of investing in securities generally or in the 
Fund particularly or the ability of the S&P 500 Index to track general stock 
market performance. Standard & Poor's only relationship to the Fund is the 
licensing of certain trademarks and trade names of Standard & Poor's and of 
the S&P 500 Index which is determined, composed and calculated by Standard & 
Poor's without regard to the Fund. Standard & Poor's has no obligation to 
take the needs of the Fund or the owners of shares of the Fund into 
consideration in determining, composing or calculating the S&P 500 Index. 
Standard & Poor's is not responsible for and has not participated in the 
determination of the prices and amount of the Fund or the timing of the 
issuance of sale of shares of the Fund. Standard & Poor's has no obligation 
or liability in connection with the administration, marketing or trading of 
the Fund. 

   Standard & Poor's does not guarantee the accuracy and/or the completeness 
of the S&P 500 Index or any data included therein and Standard & Poor's shall 
have no liability for any errors, omissions, or interruptions therein. 
Standard & Poor's makes no warranty, express or implied, as to results to be 
obtained by the Fund, owners of shares of the Fund, or any other person or 
entity from the use of the S&P 500 Index or any data included therein. 
Standard & Poor's makes no express or implied warranties, and expressly 
disclaims all warranties of merchantability or fitness for a particular 
purpose or use with respect to the S&P 500 Index or any data included 
therein. Without limiting any of the foregoing, in no event shall Standard & 
Poor's have any liability for any special, punitive, indirect, or 
consequential damages (including lost profits), even if notified of the 
possibility of such damages. 

                                       13
<PAGE>

REPURCHASE AGREEMENTS 

   When cash may be available for only a few days, it may be invested by the 
Fund in repurchase agreements until such time as it may otherwise be invested 
or used for payments of obligations of the Fund. These agreements, which may 
be viewed as a type of secured lending by the Fund, typically involve the 
acquisition by the Fund of debt securities from a selling financial 
institution such as a bank, savings and loan association or broker-dealer. 
The agreement provides that the Fund will sell back to the institution, and 
that the institution will repurchase, the underlying security ("collateral") 
at a specified price and at a fixed time in the future, usually not more than 
seven days from the date of purchase. The collateral will be maintained in a 
segregated account and will be marked to market daily to determine that the 
value of the collateral, as specified in the agreement, does not decrease 
below the purchase price plus accrued interest. If such decrease occurs, 
additional collateral will be requested and, when received, added to the 
account to maintain full collateralization. The Fund will accrue interest 
from the institution until the time when the repurchase is to occur. Although 
such date is deemed by the Fund to be the maturity date of a repurchase 
agreement, the maturities of the collateral are not subject to any limits. 

   While repurchase agreements involve certain risks not associated with 
direct investments in debt securities, the Fund follows procedures designed 
to minimize such risks. These procedures include effecting repurchase 
transactions only with large, well-capitalized and well-established financial 
institutions whose financial condition will be continually monitored by the 
Investment Manager subject to procedures established by the Board of Trustees 
of the Fund. In addition, as described above, the value of the collateral 
underlying the repurchase agreement will be at least equal to the repurchase 
price, including any accrued interest earned on the repurchase agreement. In 
the event of a default or bankruptcy by a selling financial institution, the 
Fund will seek to liquidate such collateral. However, the exercising of the 
Fund's right to liquidate such collateral could involve certain costs or 
delays and, to the extent that proceeds from any sale upon a default of the 
obligation to repurchase were less than the repurchase price, the Fund could 
suffer a loss. It is the current policy of the Fund not to invest in 
repurchase agreements that do not mature within seven days of any such 
investment, which together with any other illiquid assets held by the Fund, 
amounts to more than 15% of its net assets. 

STANDARD & POOR'S DEPOSITARY RECEIPTS ("SPDRS") 

   SPDRs are interests in a unit investment trust ("UIT") that may be 
obtained from the UIT or purchased in the secondary market as SPDRs listed on 
the American Stock Exchange. 

   The UIT will issue SPDRs in aggregations of 50,000 known as "Creation 
Units" in exchange for a "Portfolio Deposit" consisting of (a) a portfolio of 
securities substantially similar to the component securities ("Index 
Securities") of the S&P 500 Index, (b) a cash payment equal to a pro rata 
portion of the dividends accrued on the UIT's portfolio securities since the 
last dividend payment by the UIT, net of expenses and liabilities, and (c) a 
cash payment or credit ("Balancing Amount") designed to equalize the net 
asset value of the S&P 500 Index and the net asset value of a Portfolio 
Deposit. 

   SPDRs are not individually redeemable, except upon termination of the UIT. 
To redeem, the Fund must accumulate enough SPDRs to reconstitute a Creation 
Unit. The liquidity of small holdings of SPDRs, therefore, will depend upon 
the existence of a secondary market. Upon redemption of a Creation Unit, the 
Fund will receive Index Securities and cash identical to the Portfolio 
Deposit required of an investor wishing to purchase a Creation Unit that day. 

   The price of SPDRs is derived from and based upon the securities held by 
the UIT. Accordingly, the level of risk involved in the purchase or sale of a 
SPDR is similar to the risk involved in the purchase or sale of traditional 
common stock, with the exception that the pricing mechanism for SPDRs is 
based on a basket of stocks. Disruptions in the markets for the securities 
underlying SPDRs purchased or sold by the Fund could result in losses on 
SPDRs. 

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 

                                       14
<PAGE>

Fund (subject to notice provisions described below), and are at all times 
secured by cash or cash equivalents, which are maintained in a segregated 
account pursuant to applicable regulations and that are equal to at least the 
market value, determined daily, of the loaned securities. The advantage of 
such loans is that the Fund continues to receive the income on the loaned 
securities while at the same time earning interest on the cash amounts 
deposited as collateral, which will be invested in short-term obligations. 
The Fund will not lend more than 20% of the value of its total assets. A loan 
may be terminated by the borrower on one business day's notice, or by the 
Fund on four business days' notice. If the borrower fails to deliver the 
loaned securities within four days after receipt of notice, the Fund could 
use the collateral to replace the securities while holding the borrower 
liable for any excess of replacement cost over collateral. As with any 
extensions of credit, there are risks of delay in recovery and in some cases 
even loss of rights in the collateral should the borrower of the securities 
fail financially. However, these loans of portfolio securities will only be 
made to firms deemed by the Fund's management to be creditworthy and when the 
income which can be earned from such loan justifies the attendant risks. Upon 
termination of the loan, the borrower is required to return the securities to 
the Fund. Any gain or loss in the market price during the loan period would 
inure to the Fund. The creditworthiness of firms to which the Fund lends its 
portfolio securities will be monitored on an ongoing basis by the Investment 
Manager pursuant to procedures adopted and reviewed, on an ongoing basis, by 
the Board of Trustees of the Fund. 

   When voting or consent rights which accompany loaned securities pass to 
the borrower, the Fund will follow the policy of calling the loaned 
securities, to be delivered within one day after notice, to permit the 
exercise of such rights if the matters involved would have a material effect 
on the Fund's investment in such loaned securities. The Fund will pay 
reasonable finder's, administrative and custodial fees in connection with a 
loan of its securities. 

   Stock Index Futures Contracts. As discussed in the Prospectus, the Fund 
may invest in stock index futures contracts. An index futures contract sale 
creates an obligation by the Fund, as seller, to deliver cash at a specified 
future time. An index futures contract purchase would create an obligation by 
the Fund, as purchaser, to take delivery of cash at a specified future time. 
Futures contracts on indexes do not require the physical delivery of 
securities, but provide for a final cash settlement on the expiration date 
which reflects accumulated profits and losses credited or debited to each 
party's account. 

   The Fund is required to maintain margin deposits with brokerage firms 
through which it effects index futures contracts in a manner similar to that 
described above for interest rate futures contracts. Currently, the initial 
margin requirements range from 3% to 10% of the contract amount for index 
futures. In addition, due to current industry practice, daily variations in 
gains and losses on open contracts are required to be reflected in cash in 
the form of variation margin payments. The Fund may be required to make 
additional margin payments during the term of the contract. 

   At any time prior to expiration of the futures contract, the Fund may 
elect to close the position by taking an opposite position which will operate 
to terminate the Fund's position in the futures contract. A final 
determination of variation margin is then made, additional cash is required 
to be paid by or released to the Fund and the Fund realizes a loss or a gain. 

   Stock index futures contracts provide for the delivery of an amount of 
cash equal to a specified dollar amount times the difference between the 
stock index value at the open or close of the last trading day of the 
contract and the futures contract price. A futures contract sale is closed 
out by effecting a futures contract purchase for the same aggregate amount of 
the specific type of equity security and the same delivery date. If the sales 
price exceeds the offsetting purchase price, the seller would be paid the 
difference and would realize a gain. If the offsetting purchase price exceeds 
the sale price, the seller would pay the difference and would realize a loss. 
Similarly, a futures contract purchase is closed out by effecting a futures 
contract sale for the same aggregate amount of the specific type of security 
and the same delivery date. If the offsetting sale price exceeds the purchase 
price, the purchaser would realize a gain, whereas if the purchase price 
exceeds the offsetting sale price, the purchaser would realize a loss. There 
is no assurance that the Fund will be able to enter into a closing 
transaction. 

                                       15
<PAGE>

   Limitations on Futures Contracts. The Fund may not enter into futures 
contracts if, immediately thereafter, the amount committed to initial margin 
exceeds 5% of the value of the Fund's total assets, after taking into account 
unrealized gains and unrealized losses on such contracts it has entered into. 
However, there is no overall limitation on the percentage of the Fund's 
assets which may be subject to a hedge position. Except as described above 
and in the Prospectus, there are no other limitations on the use of futures 
and options thereon by the Fund. 

   Risks of Transactions in Futures Contracts. The Fund may sell a futures 
contract to protect against the decline in the value of securities held by 
the Fund. However, it is possible that the futures market may advance and the 
value of securities held in the portfolio of the Fund may decline. If this 
occurred, the Fund would lose money on the futures contract and also 
experience a decline in value of its portfolio securities. However, while 
this could occur for a very brief period or to a very small degree, over time 
the value of a diversified portfolio will tend to move in the same direction 
as the futures contracts. 

   If the Fund purchases a futures contract to hedge against the increase in 
value of securities it intends to buy, and the value of such securities 
decreases, then the Investment Manager may determine not to invest in the 
securities as planned and will realize a loss on the futures contract that is 
not offset by a reduction in the price of the securities. 

   If the Fund maintains a short position in a futures contract, it will 
cover this position by holding, in a segregated account maintained at its 
Custodian, cash, U.S. Government securities or other liquid portfolio 
securities equal in value (when added to any initial or variation margin on 
deposit) to the market value of the securities underlying the futures 
contract or the exercise price of the option. Such a position may also be 
covered by owning the securities underlying the futures contract (in the case 
of a sock index futures contract a portfolio of securities substantially 
replicating the index). 

   In addition, if the Fund holds a long position in a futures contract, it 
will hold cash, U.S. Government securities or other liquid portfolio 
securities equal to the purchase price of the contract or the exercise price 
of the put option (less the amount of initial or variation margin on deposit) 
in a segregated account maintained for the Fund by its Custodian. 
Alternatively, the Fund could cover its long position by purchasing a put 
option on the same futures contract with an exercise price as high or higher 
than the price of the contract held by the Fund. 

   Exchanges limit the amount by which the price of a futures contract may 
move on any day. If the price moves equal the daily limit on successive days, 
then it may prove impossible to liquidate a futures position until the daily 
limit moves have ceased. In the event of adverse price movements, the Fund 
would continue to be required to make daily cash payments of variation margin 
on open futures positions. In such situations, if the Fund has insufficient 
cash, it may have to sell portfolio securities to meet daily variation margin 
requirements at a time when it may be disadvantageous to do so. In addition, 
the Fund may be required to take or make delivery of the instruments 
underlying interest rate futures contracts it holds at a time when it is 
disadvantageous to do so. The inability to close out options and futures 
positions could also have an adverse impact on the Fund's ability to 
effectively hedge its portfolio. 

   In the event of the bankruptcy of a broker through which the Fund engages 
in transactions in futures, the Fund could experience delays and/or losses in 
liquidating open positions purchased or sold through the broker and/or incur 
a loss of all or part of its margin deposits with the broker. Transactions 
are entered into by the Fund only with brokers or financial institutions 
deemed creditworthy by the Investment Manager. 

   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. 
Price distortions could also result if investors in futures contracts opt to 
make or take delivery of underlying securities rather than engage in closing 
transactions due to the resultant reduction in the liquidity of the futures 
market. In addition, due to the fact that, from the point of view of 
speculators, the deposit requirements in the futures markets are less 

                                       16
<PAGE>

onerous than margin requirements in the cash market, increased participation 
by speculators in the futures market could cause temporary price distortions. 
Due to the possibility of price distortions in the futures market and because 
of the imperfect correlation between movements in the prices of securities 
and movements in the prices of futures contracts, a correct forecast of stock 
price or interest rate trends by the Investment Manager may still not result 
in a successful hedging transaction. 

   There is no assurance that a liquid secondary market will exist for 
futures contracts in which the Fund may invest. In the event a liquid market 
does not exist, it may not be possible to close out a futures position and, 
in the event of adverse price movements, the Fund would continue to be 
required to make daily cash payments of variation margin. In addition, 
limitations imposed by an exchange or board of trade on which futures 
contracts are traded may compel or prevent the Fund from closing out a 
contract which may result in reduced gain or increased loss to the Fund. The 
absence of a liquid market in futures contracts might cause the Fund to make 
or take delivery of the underlying securities at a time when it may be 
disadvantageous to do so. 

PORTFOLIO TURNOVER 

   It is anticipated that the Fund's portfolio turnover rate will not exceed 
100%. A 100% turnover rate would occur, for example, if 100% of the 
securities held in the Fund's portfolio (excluding all securities whose 
maturities at acquisition were one year or less) were sold and replaced 
within one year. 

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

   In addition to the investment restrictions enumerated in the Prospectus, 
the investment restrictions listed below have been adopted by the Fund as 
fundamental policies, except as otherwise indicated. Under the Act, a 
fundamental policy may not be changed without the vote of a majority of the 
outstanding voting securities of the Fund, as defined in the Act. Such a 
majority is defined as the lesser of (a) 67% or more of the shares present at 
a meeting of Shareholders, if the holders of 50% of the outstanding shares of 
the Fund are present or represented by proxy or (b) more than 50% of the 
outstanding shares of the Fund. For purposes of the following restrictions: 
(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. Purchase or sell real estate or interests therein (including limited
   partnership interests), although the Fund may purchase securities of issuers
   which engage in real estate operations and securities secured by real estate
   or interests therein.

       2. Purchase or sell commodities or commodities contracts except that the
   Fund may purchase or sell index futures contracts.

       3. Purchase oil, gas or other mineral leases, rights or royalty
   contracts or exploration or development programs, except that the Fund may
   invest in the securities of companies which operate, invest in, or sponsor
   such programs.

       4. Borrow money, except that the Fund may borrow from a bank for
   temporary or emergency purposes in amounts not exceeding 5% (taken at the
   lower of cost or current value) of its total assets (not including the
   amount borrowed).

       5. Pledge its assets or assign or otherwise encumber them except to
   secure borrowings effected within the limitations set forth in restriction
   (6).

       6. Issue senior securities as defined in the Act except insofar as the
   Fund may be deemed to have issued a senior security by reason of: (a)
   entering into any repurchase agreement; (b) purchasing or selling futures
   contracts or options; (c) borrowing money in accordance with restrictions
   described above; (d) purchasing any securities on a when-issued or delayed
   delivery basis; or (e) lending portfolio securities.

                                       17
<PAGE>

       7. Make loans of money or securities, except: (a) by the purchase of
   debt obligations in which the Fund may invest consistent with its investment
   objective and policies; (b) by investment in repurchase agreements; or (c)
   by lending its portfolio securities.

       8. Make short sales of securities.

       9. Purchase securities on margin, except for such short-term loans as
   are necessary for the clearance of portfolio securities. The deposit or
   payment by the Fund of initial or variation margin in connection with
   futures contracts or related options is not considered the purchase of a
   security on margin.

       10. Invest more than 15% of its total assets in "illiquid securities"
   (securities for which market quotations are not readily available),
   restricted securities and repurchase agreements which have a maturity of
   longer than seven days.

       11. Engage in the underwriting of securities, except insofar as the Fund
   may be deemed an underwriter under the Securities Act of 1933 in disposing
   of a portfolio security.

       12. Invest for the purpose of exercising control or management of any
   other issuer, 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.

PORTFOLIO TRANSACTIONS AND BROKERAGE 
- ----------------------------------------------------------------------------- 

   Subject to the general supervision of the Board of Trustees, the 
Investment Manager is responsible for decisions to buy and sell securities 
for the Fund, the selection of brokers and dealers to effect the 
transactions, and the negotiation of brokerage commissions, if any. Purchases 
and sales of securities on a stock exchange are effected through brokers who 
charge a commission for their services. In the over-the-counter market, 
securities are generally traded on a "net" basis with dealers acting as 
principal for their own accounts without a stated commission, although the 
price of the security usually includes a profit to the dealer. The Fund also 
expects that securities will be purchased at times in underwritten offerings 
where the price includes a fixed amount of compensation, generally referred 
to as the underwriter's concession or discount. Futures transactions are 
usually effected through a broker and a commission will be charged. On 
occasion, the Fund may also purchase certain money market instruments 
directly from an issuer, in which case no commissions or discounts are paid. 
During the period September 26, 1997 (commencement of operations) through 
February 28, 1998, the Fund paid a total of $48,266 in brokerage commissions. 

   The Investment Manager currently serves as investment manager to a number 
of clients, including other investment companies, and may in the future act 
as investment manager or adviser to others. It is the practice of the 
Investment Manager to cause purchase and sale transactions to be allocated 
among the Fund and others whose assets it manages in such manner as it deems 
equitable. In making such allocations among the Fund and other client 
accounts, various factors may be considered, including the respective 
investment objectives, the relative size of portfolio holdings of the same or 
comparable securities, the availability of cash for investment, the size of 
investment commitments generally held and the opinions of the persons 
responsible for managing the portfolios of the Fund and other client 
accounts. In the case of certain initial and secondary public offerings, the 
Investment Manager may utilize a pro-rata allocation process based on the 
size of the Dean Witter Funds involved and the number of shares available 
from the public offering. 

   The policy of the Fund regarding purchases and sales of securities for its 
portfolio is that primary consideration will be given to obtaining the most 
favorable prices and efficient executions of transactions. Consistent with 
this policy, when securities transactions are effected on a stock exchange, 
the Fund's policy is to pay commissions which are considered fair and 
reasonable without necessarily determining that the lowest possible 
commissions are paid in all circumstances. The Fund believes that a 
requirement always to seek the lowest possible commission cost could impede 
effective portfolio management and preclude the Fund and the Investment 
Manager from obtaining a high quality of brokerage and research services. In 
seeking to determine the reasonableness of brokerage commis- 

                                       18
<PAGE>

sions paid in any transaction, the Investment Manager relies upon its 
experience and knowledge regarding commissions generally charged by various 
brokers and on its judgment in evaluating the brokerage and research services 
received from the broker effecting the transaction. Such determinations are 
necessarily subjective and imprecise, as in most cases an exact dollar value 
for those services is not ascertainable. 

   In seeking to implement the Fund's policies, the Investment Manager 
effects transactions with those brokers and dealers who the Investment 
Manager believes provide the most favorable prices and are capable of 
providing efficient executions. If the Investment Manager believes such 
prices and executions are obtainable from more than one broker or dealer, it 
may give consideration to placing portfolio transactions with those brokers 
and dealers who also furnish research and other services to the Fund or the 
Investment Manager. Such services may include, but are not limited to, any 
one or more of the following: information as to the availability of 
securities for purchase or sale; statistical or factual information or 
opinions pertaining to investments; wire services; and appraisals or 
evaluations of portfolio securities. 

   The information and services received by the Investment Manager from 
brokers and dealers may be of benefit to the Investment Manager in the 
management of accounts of some of its other clients and may not in all cases 
benefit the Fund directly. While the receipt of such information and services 
is useful in varying degrees and would generally reduce the amount of 
research or services otherwise performed by the Investment Manager and 
thereby reduce its expenses, it is of indeterminable value and the management 
fee paid to the Investment Manager is not reduced by any amount that may be 
attributable to the value of such services. 

   Pursuant to an order of the Securities and Exchange Commission, the Fund 
may effect principal transactions in certain money market instruments with 
DWR. The Fund will limit its transactions with DWR to U.S. Government and 
Government Agency Securities, Bank Money Instruments (i.e., Certificates of 
Deposit and Bankers' Acceptances) and Commercial Paper. Such transactions 
will be effected with DWR only when the price available from DWR is better 
than that available from other dealers. 

   Consistent with the policy described above, brokerage transactions in 
securities listed on exchanges or admitted to unlisted trading privileges may 
be effected through DWR, Morgan Stanley & Co. Incorporated ("MS & Co.") and 
other brokers and dealers that are affiliates of the Investment Manager. In 
order for an affiliated broker or dealer to effect any portfolio transactions 
for the Fund, the commissions, fees or other remuneration received by the 
affiliated broker or dealer must be reasonable and fair compared to the 
commissions, fees or other remuneration paid to other brokers in connection 
with comparable transactions involving similar securities being purchased or 
sold on an exchange during a comparable period of time. This standard would 
allow the affiliated broker or dealer to receive no more than the 
remuneration which would be expected to be received by an unaffiliated broker 
in a commensurate arm's-length transaction. Furthermore, the Board of 
Trustees of the Fund, including a majority of the Trustees who are not 
"interested" persons of the Fund, as defined in the Act, have adopted 
procedures which are reasonably designed to provide that any commissions, 
fees or other remuneration paid to an affiliated broker or dealer are 
consistent with the foregoing standard. The Fund does not reduce the 
management fee it pays to the Investment Manager by any amount of the 
brokerage commissions it may pay to an affiliated broker or dealer. During 
the period September 26, 1997 (commencement of operations) through February 
28, 1998, the Fund paid no brokerage commissions to MS & Co. or DWR. 

THE DISTRIBUTOR 
- ----------------------------------------------------------------------------- 

   As discussed in the Prospectus, shares of the Fund are distributed by Dean 
Witter Distributors Inc. (the "Distributor"). The Distributor has entered 
into a selected dealer agreement with DWR, which through its own sales 
organization sells shares of the Fund. In addition, the Distributor may enter 
into selected dealer agreements with other selected broker-dealers. The 
Distributor, a Delaware corporation, is a wholly-owned subsidiary of MSDW. 
The Board of Trustees of the Fund including a majority of the Trustees who 
are not, and were not at the time they voted, interested persons of the Fund, 
as defined in the Act ( the "Independent Trustees"), approved, at their 
meeting held on July 23, 1997, a Distribution 

                                       19
<PAGE>

Agreement appointing the Distributor as exclusive distributor of the Fund's 
shares and providing for the Distributor to bear distribution expenses not 
borne by the Fund. By its terms, the Distribution Agreement has an initial 
term ending April 30, 1998, and provides that it will remain in effect from 
year to year thereafter if approved by the Board. 

   The Distributor bears all expenses it may incur in providing services 
under the Distribution Agreement. Such expenses include the payment of 
commissions for sales of the Fund's shares and incentive compensation to 
account executives. The Distributor also pays certain expenses in connection 
with the distribution of the Fund's shares, including the costs of preparing, 
printing and distributing advertising or promotional materials, and the costs 
of printing and distributing prospectuses and supplements thereto used in 
connection with the offering and sale of the Fund's shares. The Fund bears 
the costs of initial typesetting, printing and distribution of prospectuses 
and supplements thereto to shareholders. The Fund also bears the costs of 
registering the Fund and its shares under federal securities laws and pays 
filing fees in accordance with state securities laws. The Fund and the 
Distributor have agreed to indemnify each other against certain liabilities, 
including liabilities under the Securities Act of 1933, as amended. Under the 
Distribution Agreement, the Distributor uses its best efforts in rendering 
services to the Fund, but in the absence of willful misfeasance, bad faith, 
gross negligence or reckless disregard of its obligations, the Distributor is 
not liable to the Fund or any of its shareholders for any error of judgment 
or mistake of law or for any act or omission or for any losses sustained by 
the Fund or its shareholders. 

PLAN OF DISTRIBUTION 

   The Fund has adopted a Plan of Distribution pursuant to Rule 12b-1 under 
the Act (the "Plan") pursuant to which each Class, other than Class D, pays 
the Distributor compensation accrued daily and payable monthly at the annual 
rate 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 Class C. The Distributor 
receives the proceeds of front-end sales charges and of contingent deferred 
sales charges imposed on certain redemptions of shares, which are separate 
and apart from payments made pursuant to the Plan (see "Purchase of Fund 
Shares" in the Prospectus). The Distributor has informed the Fund that for 
the fiscal period ended February 28, 1998 it and/or DWR received (a) 
approximately $1,233, $176,043 and $2,465 in contingent deferred sales 
charges from Class A, Class B and Class C, respectively, and (b) 
approximately $317,745 in front-end sales charges from Class A, none of which 
was retained by the Distributor. 

   The Distributor has informed the Fund that the entire fee payable by Class 
A and a portion of the fees payable by each of Class B and Class C each year 
pursuant to the Plan equal to 0.25% of such Class's average daily net assets 
are currently each characterized as a "service fee" under the Rules of the 
Association of the National Association of Securities Dealers, Inc. (of which 
the Distributor is a member). The "service fee" is a payment made for 
personal service and/or the maintenance of shareholder accounts. The 
remaining portion of the Plan fees payable by a Class, if any, is 
characterized as an "asset-based sales charge" as such is defined by the 
aforementioned Rules of the Association. 

   The Plan was adopted by a vote of the Trustees of the Fund on July 23, 
1997 at a meeting of the Trustees called for the purpose of voting on such 
Plan. The vote included the vote of a majority of the Trustees of the Fund 
who are not "interested persons" of the Fund (as defined in the Act) and who 
have no direct or indirect financial interest in the operation of the Plan 
(the "Independent 12b-1 Trustees"). In making their decision to adopt the 
Plan, the Trustees requested from the Distributor and received such 
information as they deemed necessary to make an informed determination as to 
whether or not adoption of the Plan was in the best interests of the 
shareholders of the Fund. After due consideration of the information 
received, the Trustees, including the Independent 12b-1 Trustees, determined 
that adoption of the Plan would benefit the shareholders of the Fund. 
InterCapital, as then sole shareholder of the Fund, approved the Plan on July 
28, 1997, whereupon the Plan went into effect. 

   Under its terms, the Plan will continue in effect until April 30, 1998 and 
will remain in effect from year to year thereafter, provided such continuance 
is approved annually by a vote of the Trustees in the manner described above. 
Under the Plan and as required by Rule 12b-1, the Trustees will receive and 
review promptly after the end of each fiscal quarter a written report 
provided by the Distributor of the 

                                       20
<PAGE>

amounts expended by the Distributor under the Plan and the purpose for which 
such expenditures were made. The following chart shows the amounts accrued 
under the Plan by each Class of shares for the period September 26, 1997 
(commencement of operations) through February 28, 1998 and the percentage of 
the net assets of each Class represented by such amounts. 

<TABLE>
<CAPTION>
                                                 AMOUNT    PERCENTAGE OF NET 
                                                ACCRUED     ASSETS OF CLASS 
                                                -------     --------------- 
<S>                                            <C>               <C>
Class A......................................  $   12,848        0.24% 
Class B......................................   1,127,620        1.00 
Class C......................................      75,709        1.00 
</TABLE>    

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

   The Plan was adopted in order to permit the implementation of the Fund's 
method of distribution. Under this distribution method the Fund offers four 
Classes of shares, each with a different distribution arrangement as set 
forth in the Prospectus. 

   
   With respect to Class A shares, DWR compensates its account executives by 
paying them, from proceeds of the front-end sales charge, commissions for the 
sale of Class A shares, currently a gross sales credit of up to 5.0% of the 
amount sold (except as provided in the following sentence) and an annual 
residual commission, currently a residual of up to 0.25% of the current value 
of the respective accounts for which they are the account executives or 
dealers of record in all cases. On orders of $1 million or more (for which no 
sales charge was paid) or net asset value purchases by employer-sponsored 
401(k) and other plans qualified under Section 401(a) of the Internal Revenue 
Code ("Qualified Retirement Plans") for which MSDW Trust serves as Trustee or 
DWR's Retirement Plan Services serves as recordkeeper pursuant to a written 
Recordkeeping Services Agreement, the Investment Manager compensates DWR's 
account executives by paying them, from its own funds, a gross sales credit 
of 1.0% of the amount sold. 
    

   With respect to Class B shares, DWR compensates its account executives by 
paying them, from its own funds, commissions for the sale of Class B shares, 
currently a gross sales credit of up to 5.0% of the amount sold (except as 
provided in the following sentence) and an annual residual commission, 
currently a residual of up to 0.25% of the current value of the respective 
accounts for which they are the account executives of record in all cases. In 
the case of Class B shares purchased by Qualified Retirement Plans for which 
MSDW Trust serves as Trustee or DWR's Retirement Plan Services serves as 
recordkeeper pursuant to a written Recordkeeping Services Agreement, DWR 
compensates its account executives by paying them, from its own funds, a 
gross sales credit of 3.0% of the amount sold. 

   With respect to Class C shares, DWR compensates its account executives by 
paying them, from its own funds, commissions for the sale of Class C shares, 
currently a gross sales credit of up to 1.0% of the amount sold and an annual 
residual commission, currently a residual of up to 1.0% of the current value 
of the respective accounts for which they are the account executives of 
record. 

   With respect to Class D shares other than shares held by participants in 
the InterCapital mutual fund asset allocation program, the Investment Manager 
compensates DWR's account executives by paying them, from its own funds, 
commissions for the sale of Class D shares, currently a gross sales credit of 
up to 1.0% of the amount sold. There is a chargeback of 100% of the amount 
paid if the Class D shares are redeemed in the first year and a chargeback of 
50% of the amount paid if the Class D shares are redeemed in the second year 
after purchase. The Investment Manager also compensates DWR's account 
executives by paying them, from its own funds, an annual residual commission, 
currently a residual of up to 0.10% of the current value of the respective 
accounts for which they are the account executives of record (not including 
accounts of participants in the InterCapital mutual fund asset allocation 
program). 

   The gross sales credit is a charge which reflects commissions paid by DWR 
to its account executives and Fund associated distribution-related expenses, 
including sales compensation and overhead and other branch office 
distribution-related expenses including: (a) the expenses of operating DWR's 
branch offices in connection with the sale of Fund shares, including lease 
costs, the salaries and 

                                       21
<PAGE>

employee benefits of operations and sales support personnel, utility costs, 
communications costs and the costs of stationery and supplies; (b) the costs 
of client sales seminars; (c) travel expenses of mutual fund sales 
coordinators to promote the sale of Fund shares; and (d) other expenses 
relating to branch promotion of Fund shares sales. Payments may also be made 
with respect to distribution expenses incurred in connection with the 
distribution of shares, including personal services to shareholders with 
respect to holdings of such shares, of an investment company whose assets are 
acquired by the Fund in a tax-free reorganization. The distribution fee that 
the Distributor receives from the Fund under the Plan, in effect, offsets 
distribution expenses incurred on behalf of the Fund and, in the case of 
Class B shares, opportunity costs, such as the gross sales credit and an 
assumed interest charge thereon ("carrying charge"). In the Distributor's 
reporting of the distribution expenses to the Fund, in the case of Class B 
shares, such assumed interest (computed at the "broker's call rate") has been 
calculated on the gross sales credit as it is reduced by amounts received by 
the Distributor under the Plan and any contingent deferred sales charges 
received by the Distributor upon redemption of shares of the Fund. No other 
interest charge is included as a distribution expense in the Distributor's 
calculation of its distribution costs for this purpose. The broker's call 
rate is the interest rate charged to securities brokers on loans secured by 
exchange-listed securities. 

   Each Class paid 100% of the amounts accrued under the Plan with respect to 
the Class for the period September 26, 1997 (commencement of operations) 
through February 28, 1998 to the Distributor. The Distributor and DWR 
estimate that they have spent, pursuant to the Plan, $16,764,482 on behalf of 
Class B since the inception of the Plan. It is estimated that this amount was 
spent in approximately the following ways: (i) 6.29% 
($1,054,568)--advertising and promotional expenses; (ii) 0.84% 
($140,874)--printing of prospectuses for distribution to other than current 
shareholders; and (iii) 92.87% ($15,569,040)--other expenses, including the 
gross sales credit and the carrying charge, of which 1.64% ($255,121) 
represents carrying charges, 40.23% ($6,263,393) represents commission 
credits to DWR branch offices for payments of commissions to account 
executives and 58.13% ($9,050,526) represents overhead and other branch 
office distribution-related expenses. The amounts accrued by Class A and 
Class C for distribution during the period were for expenses which relate to 
compensation of sales personnel and associated overhead expenses. 

   The Fund is authorized to reimburse expenses incurred or to be incurred in 
promoting the distribution of the Fund's Class A and Class C shares and in 
servicing shareholder accounts. Reimbursement will be made through payments 
at the end of each month. The amount of each monthly payment may in no event 
exceed an amount equal to a payment at the annual rate of 0.25%, in the case 
of Class A, and 1.0%, in the case of Class C, of the average net assets of 
the respective Class during the month. No interest or other financing 
charges, if any, incurred on any distribution expenses on behalf of Class A 
and Class C will be reimbursable under the Plan. With respect to Class A, in 
the case of all expenses other than expenses representing the service fee, 
and, with respect to Class C, in the case of all expenses other than expenses 
representing a gross sales credit or a residual to account executives, such 
amounts shall be determined at the beginning of each calendar quarter by the 
Trustees, including, a majority of the Independent 12b-1 Trustees. Expenses 
representing the service fee (for Class A) or a gross sales credit or a 
residual to account executives (for Class C) may be reimbursed without prior 
determination. In the event that the Distributor proposes that monies shall 
be reimbursed for other than such expenses, then in making quarterly 
determinations of the amounts that may be reimbursed by the Fund, the 
Distributor will provide and the Trustees will review a quarterly budget of 
projected distribution expenses to be incurred on behalf of the Fund, 
together with a report explaining the purposes and anticipated benefits of 
incurring such expenses. The Trustees will determine which particular 
expenses, and the portions thereof, that may be borne by the Fund, and in 
making such a determination shall consider the scope of the Distributor's 
commitment to promoting the distribution of the Fund's Class A and Class C 
shares. 

   In the case of Class B shares, at any given time, the expenses in 
distributing shares of the Fund may be more or less than the total of (i) the 
payments made by the Fund pursuant to the Plan and (ii) the proceeds of 
contingent deferred sales charges paid by investors upon redemption of 
shares. The 

                                       22
<PAGE>

Distributor has advised the Fund that in the case of Class B shares the 
excess distribution expenses including the carrying charge designed to 
approximate the opportunity costs incurred by DWR which arise from it having 
advanced monies without having received the amount of any sales charges 
imposed at the time of sale of the Fund's Class B shares, totaled $15,470,964 
as of February 28, 1998. Because there is no requirement under the Plan that 
the Distributor be reimbursed for all expenses for all expenses with respect 
to Class B shares or any requirement that the Plan be continued from year to 
year, this excess amount does not constitute a liability of the Fund. 
Although there is no legal obligation for the Fund to pay distribution 
expenses in excess of payments made under the Plan and the proceeds of 
contingent deferred sales charges paid by investors upon redemption of 
shares, if for any reason the Plan is terminated, the Trustees will consider 
at that time the manner in which to treat such expenses. Any cumulative 
expenses incurred, but not yet recovered through distribution fees or 
contingent deferred sales charges, may or may not be recovered through future 
distribution fees or contingent deferred sales charges. 

   No interested person of the Fund nor any Trustee of the Fund who is not an 
interested person of the Fund, as defined in the Act, has any direct or 
indirect financial interest in the operation of the Plan except to the extent 
that the Distributor, InterCapital, DWSC and DWR or certain of their 
employees may be deemed to have such an interest as a result of benefits 
derived from the successful operation of the Plan or as a result of receiving 
a portion of the amounts expended thereunder by the Fund. 

   The Plan may not be amended to increase materially the amount to be spent 
for the services described therein without approval of the shareholders of 
the affected Class of the Fund, and all material amendments of the Plan must 
also be approved by the Trustees in the manner described above. The Plan may 
be terminated at any time, without payment of any penalty, by vote of a 
majority of the Independent 12b-1 Trustees or by a vote of a majority of the 
outstanding voting securities of the Fund (as defined in the Act) or not more 
than thirty days' written notice to any other party to the Plan. So long as 
the Plan is in effect, the election and nomination of Independent 12b-1 
Trustees shall be committed to the discretion of the Independent 12b-1 
Trustees. 

DETERMINATION OF NET ASSET VALUE 
- ----------------------------------------------------------------------------- 

   As stated in the Prospectus, short-term securities with remaining 
maturities of sixty days or less at the time of purchase are valued at 
amortized cost, unless the Trustees determine such does not reflect the 
securities' market value, in which case these securities will be valued at 
their fair value as determined by the Trustees. Other short-term debt 
securities will be valued on a mark-to-market basis until such time as they 
reach a remaining maturity of sixty days, whereupon they will be valued at 
amortized cost using their value on the 61st day unless the Trustees 
determine such does not reflect the securities' market value, in which case 
these securities will be valued at their fair value as determined by the 
Trustees. All other securities and other assets are valued at their fair 
value as determined in good faith under procedures established by and under 
the supervision of the Trustees. 

   The net asset value per share for each Class of shares of the Fund is 
determined once daily at 4:00 p.m. New York time (or, on days when the New 
York Stock Exchange closes prior to 4:00 p.m., at such earlier time), on each 
day that the New York Stock Exchange is open. The New York Stock Exchange 
currently observes the following holidays: New Year's Day, Reverend Dr. 
Martin Luther King, Jr. Day, Presidents' Day, Good Friday, Memorial Day, 
Independence Day, Labor Day, Thanksgiving Day, and Christmas Day. 

                                       23
<PAGE>

PURCHASE OF FUND SHARES 
- ----------------------------------------------------------------------------- 

   As discussed in the Prospectus, the Fund offers four Classes of shares as 
follows: 

INITIAL SALES CHARGE ALTERNATIVE--CLASS A SHARES 

   Class A shares are sold to investors with an initial sales charge that 
declines to zero for larger purchases; however, Class A shares sold without 
an initial sales charge are subject to a contingent deferred sales charge 
("CDSC") of 1.0% if redeemed within one year of purchase, except in the 
circumstances discussed in the Prospectus. 

   Right of Accumulation. As discussed in the Prospectus, investors may 
combine the current value of shares purchased in separate transactions for 
purposes of benefitting from the reduced sales charges available for 
purchases of shares of the Fund totalling at least $25,000 in net asset 
value. For example, if any person or entity who qualifies for this privilege 
holds Class A shares of the Fund and/or other Dean Witter Funds that are 
multiple class funds ("Dean Witter Multi-Class Funds") or shares of other 
Dean Witter Funds sold with a front-end sales charge purchased at a price 
including a front-end sales charge having a current value of $5,000, and 
purchases $20,000 of additional shares of the Fund, the sales charge 
applicable to the $20,000 purchase would be 4.75% of the offering price. 

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

   Letter of Intent. As discussed in the Prospectus, reduced sales charges 
are available to investors who enter into a written Letter of Intent 
providing for the purchase, within a thirteen-month period, of Class A shares 
of the Fund from the Distributor or from a single Selected Broker-Dealer. 

   A Letter of Intent permits an investor to establish a total investment 
goal to be achieved by any number of purchases over a thirteen-month period. 
Each purchase of Class A shares made during the period will receive the 
reduced sales commission applicable to the amount represented by the goal, as 
if it were a single purchase. A number of shares equal in value to 5% of the 
dollar amount of the Letter of Intent will be held in escrow by the Transfer 
Agent, in the name of the shareholder. The initial purchase under a Letter of 
Intent must be equal to at least 5% of the stated investment goal. 

   The Letter of Intent does not obligate the investor to purchase, nor the 
Fund to sell, the indicated amount. In the event the Letter of Intent goal is 
not achieved within the thirteen-month period, the investor is required to 
pay the difference between the sales charge otherwise applicable to the 
purchases made during this period and sales charges actually paid. Such 
payment may be made directly to the Distributor or, if not paid, the 
Distributor is authorized by the shareholder to liquidate a sufficient number 
of his or her escrowed shares to obtain such difference. 

   If the goal is exceeded and purchases pass the next sales charge level, 
the sales charge on the entire amount of the purchase that results in passing 
that level and on subsequent purchases will be subject to further reduced 
sales charges in the same manner as set forth above under "Right of 
Accumulation," but there will be no retroactive reduction of sales charges on 
previous purchases. For the purpose of determining whether the investor is 
entitled to a further reduced sales charge applicable to purchases at or 
above a sales charge level which exceeds the stated goal of a Letter of 
Intent, the cumulative current net asset value of any shares owned by the 
investor in any other Dean Witter Funds held by the shareholder which were 
previously purchased at a price including a front-end sales charge (including 
shares of the Fund and other Dean Witter Funds acquired in exchange for those 
shares, and including in each case shares acquired through reinvestment of 
dividends and distributions) will be added to the cost or net asset value of 
shares of the Fund owned by the investor. However, shares of "Exchange Funds" 
(see "Shareholder Services--Exchange Privilege") and the purchase of shares 
of other Dean Witter Funds will not be included in determining whether the 
stated goal of a Letter of Intent has been reached. 

                                       24
<PAGE>

   At any time while a Letter of Intent is in effect, a shareholder may, by 
written notice to the Distributor, increase the amount of the stated goal. In 
that event, only shares purchased during the previous 90-day period and still 
owned by the shareholder will be included in the new sales charge reduction. 
The 5% escrow and minimum purchase requirements will be applicable to the new 
stated goal. Investors electing to purchase shares of the Fund pursuant to a 
Letter of Intent should carefully read such Letter of Intent. 

CONTINGENT DEFERRED SALES CHARGE ALTERNATIVE--CLASS B SHARES 

   Class B shares are sold without an initial sales charge but are subject to 
a CDSC payable upon most redemptions within six years after purchase. As 
stated in the Prospectus, a CDSC will be imposed on any redemption by an 
investor if after such redemption the current value of the investor's Class B 
shares of the Fund is less than the dollar amount of all payments by the 
shareholder for the purchase of Class B shares during the preceding six years 
(or, in the case of shares held by certain Qualified Retirement Plans, three 
years). However, no CDSC will be imposed to the extent that the net asset 
value of the shares redeemed does not exceed: (a) the current net asset value 
of shares purchased more than six years (or, in the case of shares held by 
certain Qualified Retirement Plans, three years) prior to the redemption, 
plus (b) the current net asset value of shares purchased through reinvestment 
of dividends or distributions of the Fund or another Dean Witter Fund (see 
"Shareholder Services--Targeted Dividends"), plus (c) the current net asset 
value of shares acquired in exchange for (i) shares of Dean Witter front-end 
sales charge funds, or (ii) shares of other Dean Witter Funds for which 
shares of front-end sales charge funds have been exchanged (see "Shareholder 
Services--Exchange Privilege"), plus (d) increases in the net asset value of 
the investor's shares above the total amount of payments for the purchase of 
Fund shares made during the preceding six (three) years. The CDSC will be 
paid to the Distributor. 

   In determining the applicability of the CDSC to each redemption, the 
amount which represents an increase in the net asset value of the investor's 
shares above the amount of the total payments for the purchase of shares 
within the last six years (or, in the case of shares held by certain 
Qualified Retirement Plans, three years) will be redeemed first. In the event 
the redemption amount exceeds such increase in value, the next portion of the 
amount redeemed will be the amount which represents the net asset value of 
the investor's shares purchased more than six (three) years prior to the 
redemption and/or shares purchased through reinvestment of dividends or 
distributions and/or shares acquired in exchange for shares of Dean Witter 
front-end sales charge funds, or for shares of other Dean Witter funds for 
which shares of front-end sales charge funds have been exchanged. A portion 
of the amount redeemed which exceeds an amount which represents both such 
increase in value and the value of shares purchased more than six years (or, 
in the case of shares held by certain Qualified Retirement Plans, three 
years) prior to the redemption and/or shares purchased through reinvestment 
of dividends or distributions and/or shares acquired in the above-described 
exchanges will be subject to a CDSC. 

   The amount of the CDSC, if any, will vary depending on the number of years 
from the time of payment for the purchase of Class B shares of the Fund until 
the time of redemption of such shares. For purposes of determining the number 
of years from the time of any payment for the purchase of shares, all 
payments made during a month will be aggregated and deemed to have been made 
on the last day of the month. The following table sets forth the rates of the 
CDSC applicable to most Class B shares of the Fund: 

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

                                       25
<PAGE>

   The following table sets forth the rates of the CDSC applicable to Class B 
shares of the Fund purchased by Qualified Retirement Plans for which MSDW 
Trust serves as Trustee or DWR's Retirement Plan Services serves as 
recordkeeper pursuant to a written Recordkeeping Services Agreement: 

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

   In determining the rate of the CDSC, it will be assumed that a redemption 
is made of shares held by the investor for the longest period of time within 
the applicable six-year or three-year period. This will result in any such 
CDSC being imposed at the lowest possible rate. The CDSC will be imposed, in 
accordance with the table shown above, on any redemptions within six years 
(or, in the case of shares held by certain Qualified Retirement Plans, three 
years) of purchase which are in excess of these amounts and which redemptions 
do not qualify for waiver of the CDSC, as described in the Prospectus. 

LEVEL LOAD ALTERNATIVE--CLASS C SHARES 

   Class C shares are sold without a sales charge but are subject to a CDSC 
of 1.0% on most redemptions made within one year after purchase, except in 
the circumstances discussed in the Prospectus. 

NO LOAD ALTERNATIVE--CLASS D SHARES 

   Class D shares are offered without any sales charge on purchase or 
redemption. Class D shares are offered only to those persons meeting the 
qualifications set forth in the Prospectus. 

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

   Upon the purchase of shares of the Fund, a Shareholder Investment Account 
is opened for the investor on the books of the Fund and maintained by the 
Transfer Agent. This is an open account in which shares owned by the investor 
are credited by the Transfer Agent in lieu of issuance of a share 
certificate. If a share certificate is desired, it must be requested in 
writing for each transaction. Certificates are issued only for full shares 
and may be redeposited in the account at any time. There is no charge to the 
investor for issuance of a certificate. Whenever a shareholder instituted 
transaction takes place in the Shareholder Investment Account, the 
shareholder will be mailed a confirmation of the transaction from the Fund or 
from DWR or other selected broker-dealer. 

   Automatic Investment of Dividends and Distributions. As stated in the 
Prospectus, all income dividends and capital gains distributions are 
automatically paid in full and fractional shares of the applicable Class of 
the Fund, unless the shareholder requests that they be paid in cash. Each 
purchase of shares of the Fund is made upon the condition that the Transfer 
Agent is thereby automatically appointed as agent of the investor to receive 
all dividends and capital gains distributions on shares owned by the 
investor. Such dividends and distributions will be paid, at the net asset 
value per share, in shares of the applicable Class of the Fund (or in cash if 
the shareholder so requests) as of the close of business on the record date. 
At any time an investor may request the Transfer Agent, in writing, to have 
subsequent dividends and/or capital gains distributions paid to him or her in 
cash rather than shares. To assure sufficient time to process the change, 
such request should be received by the Transfer Agent at least five business 
days prior to the record date of the dividend or distribution. In the case of 
recently purchased shares for which registration instructions have not been 
received on the record date, cash payments will be made to DWR or other 
selected broker-dealer, and will be forwarded to the shareholder, upon the 
receipt of proper instructions. It has been and remains the Fund's policy and 
practice that, if checks for dividends or distributions paid in cash remain 
uncashed, no interest will accrue on amounts represented by such uncashed 
checks. 

                                       26
<PAGE>

   Targeted Dividends (Service Mark) . In states where it is legally 
permissible, shareholders may also have all income dividends and capital 
gains distributions automatically invested in shares of any Class of an 
open-end Dean Witter Fund other than Dean Witter S&P 500 Index Fund or in 
another Class of Dean Witter S&P 500 Index Fund. Such investment will be made 
as described above for automatic investment in shares of the applicable Class 
of the Fund, at the net asset value per share of the selected Dean Witter 
Fund as of the close of business on the payment date of the dividend or 
distribution and will begin to earn dividends, if any, in the selected Dean 
Witter Fund the next business day. To participate in the Targeted Dividends 
program, shareholders should contact their DWR or other selected 
broker-dealer account executive or the Transfer Agent. Shareholders of the 
Fund must be shareholders of the selected Class of the Dean Witter Fund 
targeted to receive investments from dividends at the time they enter the 
Targeted Dividends program. Investors should review the prospectus of the 
targeted Dean Witter Fund before entering the program. 

   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. Shares purchased through EasyInvest will be added to the 
shareholder's existing account at the net asset value calculated the same 
business day the transfer of funds is effected (subject to any applicable 
sales charges). Shares of the Dean Witter money market funds redeemed in 
connection with EasyInvest are redeemed on the business day preceding the 
transfer of funds. For further information or to subscribe to EasyInvest, 
shareholders should contact their DWR or other selected broker-dealer account 
executive or the Transfer Agent. 

   Investment of Dividends or Distributions Received in Cash. As discussed in 
the Prospectus, any shareholder who receives a cash payment representing a 
dividend or distribution may invest such dividend or distribution in shares 
of the applicable Class at net asset value, without the imposition of a CDSC 
upon redemption, by returning the check or the proceeds to the Transfer Agent 
within thirty days after the payment date. If the shareholder returns the 
proceeds of a dividend or distribution, such funds must be accompanied by a 
signed statement indicating that the proceeds constitute a dividend or 
distribution to be invested. Such investment will be made at the net asset 
value per share next determined after receipt of the check or proceeds by the 
Transfer Agent. 

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

   The Transfer Agent acts as agent for the shareholder in tendering to the 
Fund for redemption sufficient full and fractional shares to provide the 
amount of the periodic withdrawal payment designated in the application. The 
shares will be redeemed at their net asset value determined, at the 
shareholder's option, on the tenth or twenty-fifth day (or next following 
business day) of the relevant month or quarter and normally a check for the 
proceeds will be mailed by the Transfer Agent, or amounts credited to a 
shareholder's DWR brokerage account, within five business days after the date 
of redemption. The Withdrawal Plan may be terminated at any time by the Fund. 

   Withdrawal Plan payments should not be considered as dividends, yields or 
income. If periodic withdrawal plan payments continuously exceed net 
investment income and net capital gains, the share holder'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 

                                       27
<PAGE>

tax purposes. Although the shareholder may make additional investments of 
$2,500 or more under the Withdrawal Plan, withdrawals made concurrently with 
purchases of additional shares may be inadvisable because of sales charges 
which may be applicable to purchases or redemptions of shares (see "Purchase 
of Fund Shares"). 

   Any shareholder who wishes to have payments under the Withdrawal Plan made 
to a third party or sent to an address other than the one listed on the 
account must send complete written instructions to the Transfer Agent to 
enroll in the Withdrawal Plan. The shareholder's signature on such 
instructions must be guaranteed by an eligible guarantor acceptable to the 
Transfer Agent (shareholders should contact the Transfer Agent for a 
determination as to whether a particular institution is such an eligible 
guarantor). A shareholder may, at any time, change the amount and interval of 
withdrawal payments through his or her Account Executive or by written 
notification to the Transfer Agent. In addition, the party and/or the address 
to which checks are mailed may be changed by written notification to the 
Transfer Agent, with signature guarantees required in the manner described 
above. The shareholder may also terminate the Withdrawal Plan at any time by 
written notice to the Transfer Agent. In the event of such termination, the 
account will be continued as a regular shareholder investment account. The 
shareholder may also redeem all or part of the shares held in the Withdrawal 
Plan account (see "Redemptions and Repurchases" in the Prospectus) at any 
time. Shareholders wishing to enroll in the Withdrawal Plan should contact 
their account executive or the Transfer Agent. 

   Direct Investments through Transfer Agent. As discussed in the Prospectus, 
shareholders may make additional investments in any Class of shares of the 
Fund for which they qualify at any time by sending a check in any amount, not 
less than $100, payable to Dean Witter S&P 500 Index Fund, and indicating the 
selected Class, directly to the Fund's Transfer Agent. In the case of Class A 
shares, after deduction of any applicable sales charge, the balance will be 
applied to the purchase of Fund shares, and, in the case of shares of the 
other Classes, the entire amount will be applied to the purchase of Fund 
shares, at the net asset value per share next computed after receipt of the 
check or purchase payment by the Transfer Agent. The shares so purchased will 
be credited to the investor's account. 

EXCHANGE PRIVILEGE 

   As discussed in the Prospectus, the Fund makes available to its 
shareholders an Exchange Privilege whereby shareholders of each Class of 
shares of the Fund may exchange their shares for shares of the same Class of 
shares of any other Dean Witter Multi-Class Fund without the imposition of 
any exchange fee. Shares may also be exchanged for share of any 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 foregoing nine funds are hereinafter referred to as 
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. ("Global Short-Term"), which is a 
Dean Witter Fund offered with a CDSC. Exchanges may be made after the shares 
of the Fund acquired by purchase (not by exchange or dividend reinvestment) 
have been held for thirty days. There is no waiting period for exchanges of 
shares acquired by exchange or dividend reinvestment. An exchange will be 
treated for federal income tax purposes the same as a repurchase or 
redemption of shares, on which the shareholder may realize a capital gain or 
loss. 

   Any new account established through the Exchange Privilege will have the 
same registration and cash dividend or dividend reinvestment plan as the 
present account, unless the Transfer Agent receives written notification to 
the contrary. For telephone exchanges, the exact registration of the existing 
account and the account number must be provided. 

   Any shares held in certificate form cannot be exchanged but must be 
forwarded to the Transfer Agent and deposited into the shareholder's account 
before being eligible for exchange. (Certificates mailed in for deposit 
should not be endorsed.) 

   As described below, and in the Prospectus under the caption "Purchase of 
Fund Shares," a CDSC may be imposed upon a redemption, depending on a number 
of factors, including the number of years 

                                       28
<PAGE>

from the time of purchase until the time of redemption or exchange ("holding 
period"). When shares of a Dean Witter Multi-Class Fund or Global Short-Term 
are exchanged for shares of an Exchange Fund, the exchange is executed at no 
charge to the shareholder, without the imposition of the CDSC at the time of 
the exchange. During the period of time the shareholder remains in the 
Exchange Fund (calculated from the last day of the month in which the 
Exchange Fund shares were acquired), the holding period or "year since 
purchase payment made" is frozen. When shares are redeemed out of the 
Exchange Fund, they will be subject to a CDSC which would be based upon the 
period of time the shareholder held shares in a Dean Witter Multi-Class Fund 
or in Global Short-Term. However, in the case of shares exchanged into an 
Exchange Fund on or after April 23, 1990, upon a redemption of shares which 
results in a CDSC being imposed, a credit (not to exceed the amount of the 
CDSC) will be given in an amount equal to the Exchange Fund 12b-1 
distribution fees, if any, incurred on or after that date which are 
attributable to those shares. Shareholders acquiring shares of an Exchange 
Fund pursuant to this exchange privilege may exchange those shares back into 
a Dean Witter Multi-Class Fund or Global Short-Term from the Exchange Fund, 
with no CDSC being imposed on such exchange. The holding period previously 
frozen when shares were first exchanged for shares of the Exchange Fund 
resumes on the last day of the month in which shares of a Dean Witter 
Multi-Class Fund or Global Short-Term are reacquired. A CDSC is imposed only 
upon an ultimate redemption, based upon the time (calculated as described 
above) the shareholder was invested in a Dean Witter Multi-Class Fund or in 
Global Short-Term. In the case of exchanges of Class A shares which are 
subject to a CDSC, the holding period also includes the time (calculated as 
described above) the shareholder was invested in a FSC Fund. 

   When shares initially purchased in a Dean Witter Multi-Class Fund or in 
Global Short-Term are exchanged for shares of a Dean Witter Multi-Class Fund, 
shares of Global Short-Term, shares of a FSC Fund, or shares of an Exchange 
Fund, the date of purchase of the shares of the fund exchanged into, for 
purposes of the CDSC upon redemption, will be the last day of the month in 
which the shares being exchanged were originally purchased. In allocating the 
purchase payments between funds for purposes of the CDSC, the amount which 
represents the current net asset value of shares at the time of the exchange 
which were (i) purchased more than one, three or six years (depending on the 
CDSC schedule applicable to the shares) prior to the exchange, (ii) 
originally acquired through reinvestment of dividends or distributions and 
(iii) acquired in exchange for shares of FSC Funds, or for shares of other 
Dean Witter Funds for which shares of FSC Funds have been exchanged (all such 
shares called "Free Shares"), will be exchanged first. After an exchange, all 
dividends earned on shares in an Exchange Fund will be considered Free 
Shares. If the exchanged amount exceeds the value of such Free Shares, an 
exchange is made, on a block-by-block basis, of non-Free Shares held for the 
longest period of time (except that, with respect to Class B shares, if 
shares held for identical periods of time but subject to different CDSC 
schedules are held in the same Exchange Privilege account, the shares of that 
block that are subject to a lower CDSC rate will be exchanged prior to the 
shares of that block that are subject to a higher CDSC rate). Shares equal to 
any appreciation in the value of non-Free Shares exchanged will be treated as 
Free Shares, and the amount of the purchase payments for the non-Free Shares 
of the fund exchanged into will be equal to the lesser of (a) the purchase 
payments for, or (b) the current net asset value of, the exchanged non-Free 
Shares. If an exchange between funds would result in exchange of only part of 
a particular block of non-Free Shares, then shares equal to any appreciation 
in the value of the block (up to the amount of the exchange) will be treated 
as Free Shares and exchanged first, and the purchase payment for that block 
will be allocated on a pro rata basis between the non-Free Shares of that 
block to be retained and the non-Free Shares to be exchanged. The prorated 
amount of such purchase payment attributable to the retained non-Free Shares 
will remain as the purchase payment for such shares, and the amount of 
purchase payment for the exchanged non-Free Shares will be equal to the 
lesser of (a) the prorated amount of the purchase payment for, or (b) the 
current net asset value of, those exchanged non-Free Shares. Based upon the 
procedures described in the Prospectus under the caption "Purchase of Fund 
Shares," any applicable CDSC will be imposed upon the ultimate redemption of 
shares of any fund, regardless of the number of exchanges since those shares 
were originally purchased. 

   With respect to the redemption or repurchase of shares of the Fund, the 
application of proceeds to the purchase of new shares in the Fund or any 
other of the funds and the general administration of the 

                                       29
<PAGE>

Exchange Privilege, the Transfer Agent acts as agent for the Distributor and 
for the shareholder's selected broker-dealer, if any, in the performance of 
such functions. With respect to exchanges, redemptions or repurchases, the 
Transfer Agent shall be liable for its own negligence and not for the default 
or negligence of its correspondents or for losses in transit. The Fund shall 
not be liable for any default or negligence of the Transfer Agent, the 
Distributor or any selected broker-dealer. 

   The Distributor and any selected broker-dealer have authorized and 
appointed the Transfer Agent to act as their agent in connection with the 
application of proceeds of any redemption of Fund shares to the purchase of 
shares of any other fund and the general administration of the Exchange 
Privilege. No commission or discounts will be paid to the Distributor or any 
selected broker-dealer for any transactions pursuant to this Exchange 
Privilege. 

   Exchanges are subject to the minimum investment requirement and any other 
conditions imposed by each fund. (The minimum initial investment for the 
Exchange Privilege account of each Class is $5,000 for Dean Witter Liquid 
Asset Fund Inc., Dean Witter Tax-Free Daily Income Trust, Dean Witter 
California Tax-Free Daily Income Trust, Dean Witter New York Municipal Money 
Market Trust although those funds may, at their discretion, accept initial 
investments of as low as $1,000. The minimum investment for the Exchange 
Privilege account of each Class is $10,000 for Dean Witter Short-Term U.S. 
Treasury Trust, although that fund, in its discretion, may accept initial 
purchases of as low as $5,000. The minimum initial investment for the 
Exchange Privilege account of each Class is $5,000 for Dean Witter Special 
Value Fund. The minimum initial investment for the Exchange Privilege account 
of each Class for all other Dean Witter Funds for which the Exchange 
Privilege is available is $1,000.) Upon exchange into an Exchange Fund, the 
shares of that fund will be held in a special Exchange Privilege Account 
separately from accounts of those shareholders who have acquired their shares 
directly from that fund. As a result, certain services normally available to 
shareholders of those funds, including the check writing feature, will not be 
available for funds held in that account. 

   The Fund and each of the other Dean Witter Funds may limit the number of 
times this Exchange Privilege may be exercised by any investor within a 
specified period of time. Also, the Exchange Privilege may be terminated or 
revised at any time by the Fund and/or any of the Dean Witter Funds for which 
shares of the Fund have been exchanged, upon such notice as may be required 
by applicable regulatory agencies (presently sixty days' prior written notice 
for termination or material revision), provided that six months' prior 
written notice of termination will be given to the shareholders who hold 
shares of Exchange Funds, pursuant to the Exchange Privilege, and provided 
further that the Exchange Privilege may be terminated or materially revised 
without notice at times (a) when the New York Stock Exchange is closed for 
other than customary weekends and holidays, (b) when trading on that Exchange 
is restricted, (c) when an emergency exists as a result of which disposal by 
the Fund of securities owned by it is not reasonably practicable or it is not 
reasonably practicable for the Fund fairly to determine the value of its net 
assets, (d) during any other period when the Securities and Exchange 
Commission by order so permits (provided that applicable rules and 
regulations of the Securities and Exchange Commission shall govern as to 
whether the conditions prescribed in (b) or (c) exist) or (e) if the Fund 
would be unable to invest amounts effectively in accordance with its 
investment objective, policies and restrictions. 

   For further information regarding the Exchange Privilege, shareholders 
should contact their DWR or other selected broker-dealer account executive or 
the Transfer Agent. 

                                       30
<PAGE>

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

   Redemption. As stated in the Prospectus, shares of each Class of the Fund 
can be redeemed for cash at any time at the net asset value per share next 
determined; however, such redemption proceeds will be reduced by the amount 
of any applicable CDSC. If shares are held in a shareholder's account without 
a share certificate, a written request for redemption to the Fund's Transfer 
Agent at P.O. Box 983, Jersey City, NJ 07303 is required. If certificates are 
held by the shareholder, the shares may be redeemed by surrendering the 
certificates with a written request for redemption. The share certificate, or 
an accompanying stock power, and the request for redemption, must be signed 
by the shareholder or shareholders exactly as the shares are registered. Each 
request for redemption, whether or not accompanied by a share certificate, 
must be sent to the Fund's Transfer Agent, which will redeem the shares at 
their net asset value next computed (see "Purchase of Fund Shares") after it 
receives the request, and certificate, if any, in good order. Any redemption 
request received after such computation will be redeemed at the next 
determined net asset value. The term good order means that the share 
certificate, if any, and request for redemption are properly signed, 
accompanied by any documentation required by the Transfer Agent, and bear 
signature guarantees when required by the Fund or Transfer Agent. 

   Whether certificates are held by the shareholder or shares are held in a 
shareholder's account, if the proceeds are to be paid to any person other 
than the record owner, or if the proceeds are to be paid to a corporation 
(other than the Distributor or a selected broker-dealer for the account of 
the shareholder), partnership, trust or fiduciary, or sent to the shareholder 
at an address other than the registered address, signatures must be 
guaranteed by an eligible guarantor acceptable to the Transfer Agent 
(shareholders should contact the Transfer Agent for a determination as to 
whether a particular institution is such an eligible guarantor). A stock 
power may be obtained from any dealer or commercial bank. The Fund may change 
the signature guarantee requirements from time to time upon notice to 
shareholders, which may be by means of a supplement to the prospectus. 

   Repurchase. As stated in the Prospectus, DWR and other selected 
broker-dealers are authorized to repurchase shares represented by a share 
certificate which is delivered to any of their offices. Shares held in a 
shareholder's account without a share certificate may also be repurchased by 
DWR and other selected broker-dealers upon the telephonic request of the 
shareholder. The repurchase price is the net asset value next computed after 
such purchase order is received by DWR or other selected broker-dealer 
reduced by any applicable CDSC. 

   Payment for Shares Redeemed or Repurchased. As discussed in the 
Prospectus, payment for shares of any Class presented for repurchase or 
redemption will be made by check within seven days after receipt by the 
Transfer Agent of the certificate and/or written request in good order. Such 
payment may be postponed or the right of redemption suspended at times (a) 
when the New York Stock Exchange is closed for other than customary weekends 
and holidays, (b) when trading on that Exchange is restricted, (c) when an 
emergency exists as a result of which disposal by the Fund of securities 
owned by it is not reasonably practicable or it is not reasonably practicable 
for the Fund fairly to determine the value of its net assets, or (d) during 
any other period when the Securities and Exchange Commission by order so 
permits; provided that applicable rules and regulations of the Securities and 
Exchange Commission shall govern as to whether the conditions prescribed in 
(b) or (c) exist. If the shares to be redeemed have recently been purchased 
by check, payment of the redemption proceeds may be delayed for the minimum 
time needed to verify that the check used for investment has been honored 
(not more than fifteen days from the time of receipt of the check by the 
Transfer Agent). It has been and remains the Fund's policy and practice that, 
if checks for redemption proceeds remain uncashed, no interest will accrue on 
amounts represented by such uncashed checks. Shareholders maintaining margin 
accounts with DWR or another selected broker-dealer are referred to their 
account executive regarding restrictions on redemption of shares of the Fund 
pledged in the margin account. 

   Transfers of Shares. In the event a shareholder requests a transfer of any 
shares to a new registration, such shares will be transferred without sales 
charge at the time of transfer. With regard to 

                                       31
<PAGE>

the status of shares which are either subject to the CDSC or free of such 
charge (and with regard to the length of time shares subject to the charge 
have been held), any transfer involving less than all of the shares in an 
account will be made on a pro rata basis (that is, by transferring shares in 
the same proportion that the transferred shares bear to the total shares in 
the account immediately prior to the transfer). The transferred shares will 
continue to be subject to any applicable CDSC as if they had not been so 
transferred. 

   Reinstatement Privilege. As discussed in the Prospectus, a shareholder who 
has had his or her shares redeemed or repurchased and has not previously 
exercised this reinstatement privilege may, within 35 days after the 
redemption or repurchase, reinstate any portion or all of the proceeds of 
such redemption or repurchase in shares of the Fund in the same Class at the 
net asset value next determined after a reinstatement request, together with 
the proceeds, is received by the Transfer Agent. 

   Exercise of the reinstatement privilege will not affect the federal income 
tax and state income tax treatment of any gain or loss realized upon the 
redemption or repurchase, except that if the redemption or repurchase 
resulted in a loss and reinstatement is made in shares of the Fund, some or 
all of the loss, depending on the amount reinstated, will not be allowed as a 
deduction for federal income tax and state personal income tax purposes but 
will be applied to adjust the cost basis of the shares acquired upon 
reinstatement. 

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

   As discussed in the Prospectus under "Dividends, Distributions and Taxes," 
the Fund will determine either to distribute or to retain all or part of any 
net long-term capital gains in any year for reinvestment. If any such gains 
are retained, the Fund will pay federal income tax thereon, and shareholders 
at year-end will be able to claim their share of the tax paid by the Fund as 
a credit against their individual federal income tax. Shareholders will 
increase their tax basis of Fund shares owned by an amount equal, under 
current law, to 65% of the amount of undistributed capital gains. 

   Because the Fund intends to distribute substantially all of its net 
investment income and net capital gains to shareholders and otherwise qualify 
as a regulated investment company under Subchapter M of the Internal Revenue 
Code, it is not expected that the Fund will be required to pay any federal 
income tax. In addition, the Fund intends to distribute to its shareholders 
each calendar year a sufficient amount of ordinary income and capital gains 
to avoid the imposition of a 4% excise tax. Shareholders will normally have 
to pay federal income taxes, and any state income taxes, on the dividends and 
distributions they receive from the Fund. Such dividends and distributions, 
to the extent that they are derived from the net investment income or net 
short-term capital gains, are taxable to the shareholder as ordinary income 
regardless of whether the shareholder receives such payments in additional 
shares or in cash. Any dividends declared in the last quarter of any calendar 
year which are paid in the following year prior to February 1 will be deemed 
received by the shareholder in the prior calendar year. The amount of 
dividends paid by the Fund which may qualify for the dividends received 
deduction is limited to the aggregate amount of qualifying dividends which 
the Fund derives from its portfolio investments which the Fund has held for a 
minimum period, usually 46 days within a 90-day period beginning 45 days 
before the ex dividend date of each qualifying dividend. Shareholders must 
meet a similar holding period requirement with respect to their shares to 
claim the dividends received deduction with respect to any distribution of 
qualifying dividends. Any long-term capital gain distributions will also not 
be eligible for the dividends received deduction. The ability to take the 
dividends received deduction will also be limited in the case of a Fund 
shareholder which incurs or continues indebtedness which is directly 
attributable to its investment in the Fund. 

   Gains or losses on sales of securities by the Fund will be long-term 
capital gains or losses if the securities have a tax holding period of more 
than twelve months. Gains or losses on the sale of securities with a tax 
holding period of twelve months or less will be short-term capital gains or 
losses. The Treasury Department intends to issue regulations to permit 
shareholders to take into account their proportionate share of the Fund's 
capital gains distributions that will be subject to a reduced rate under the 
Taxpayer Relief Act of 1997. The Taxpayer Relief Act reduced the maximum tax 
on long-term capital gains from 

                                       32
<PAGE>

28% to 20%; however, it also lengthened the required holding period to obtain 
this lower rate from more than 12 months to more than 18 months. These lower 
rates do not apply to collectibles and certain other assets. Additionally, 
the maximum capital gain rate for assets that are held more than 5 years and 
that are acquired after December 31, 2000 is 18%. 

   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. Gains or losses on the 
Fund's transactions in certain listed options on securities and on futures 
and options on futures generally are treated as 60% long-term gain or loss 
and 40% short-term gain or loss. When the Fund engages in options and futures 
transactions, various tax regulations applicable to the Fund may have the 
effect of causing the Fund to recognize a gain or loss for tax purposes 
before that gain or loss is realized, or to defer recognition of a realized 
loss for tax purposes. Recognition, for tax purposes, of an unrealized loss 
may result in a lesser amount of the Fund's realized net gains being 
available for distribution. 

   Under current federal tax law, the Fund will receive net investment income 
in the form of interest by virtue of holding Treasury bills, notes and bonds, 
and will recognize income attributable to it from holding zero coupon 
Treasury securities. 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 payment in cash on the security during the year. As an investment 
company, the Fund must pay out substantially all of its net investment income 
each year. Accordingly, the Fund, to the extent it invests in zero coupon 
Treasury securities, may be required to pay out as an income distribution 
each year an amount which is greater than the total amount of cash receipts 
of interest the Fund actually received. Such distributions will be made from 
the available cash of the Fund or by liquidation of portfolio securities if 
necessary. If a distribution of cash necessitates the liquidation of 
portfolio securities, the Investment Manager will select which securities to 
sell. The Fund may realize a gain or loss from such sales. In the event the 
Fund realizes net capital gains from such transactions, its shareholders may 
receive a larger capital gain distribution, if any, than they would in the 
absence of such transactions. 

   Any dividend or capital gains distribution received by a shareholder from 
any investment company will have the effect of reducing the net asset value 
of the shareholder's stock in that company by the exact amount of the 
dividend or capital gains distribution. Furthermore, capital gains 
distributions and some portion of the dividends are subject to federal income 
taxes. If the net asset value of the shares should be reduced below a 
shareholder's cost as a result of the payment of dividends or the 
distribution of realized long-term capital gains, such payment or 
distribution would be in part a return of capital but nonetheless would be 
taxable to the shareholder. Therefore, an investor should consider the tax 
implications of purchasing Fund shares immediately prior to a distribution 
record date. 

   Shareholders are urged to consult their attorneys or tax advisers 
regarding specific questions as to federal, state or local taxes. 

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

   As discussed in the Prospectus, from time to time the Fund may quote its 
"total return" in advertisements and sales literature. These figures are 
computed separately for Class A, Class B, Class C and Class D shares. The 
Fund's "average annual total return" represents an annualization of the 
Fund's total return over a particular period and is computed by finding the 
annual percentage rate which will result in the ending redeemable value of a 
hypothetical $1,000 investment made at the beginning of a one, five or ten 
year period, or for the period from the date of commencement of the Fund's 
operations, if shorter than any of the foregoing. 

                                       33
<PAGE>

   For periods of less than one year, the Fund quotes its total return on a 
non-annualized basis. Accordingly, the Fund may compute its aggregate total 
return for each Class for specified periods by determining the aggregate 
percentage rate which will result in the ending value of a hypothetical 
$1,000 investment made at the beginning of the period. For the purpose of 
this calculation, it is assumed that all dividends and distributions are 
reinvested. The formula for computing aggregate total return involves a 
percentage obtained by dividing the ending value by the initial $1,000 
investment and subtracting 1 from the result. The ending redeemable value is 
reduced by any CDSC at the end of the period. Based on the foregoing 
calculations, the total returns for the period September 26, 1997 
(commencement of operations) through February 28, 1998 were 5.62%, 6.09%, 
10.08% and 11.53% for Class A, Class B, Class C and Class D, respectively. 

   In addition to the foregoing, the Fund may advertise its total return for 
each Class over different periods of time by means of aggregate, average, 
year-by-year or other types of total return figures. Such calculations may or 
may not reflect the imposition of the maximum front-end sales charge for 
Class A or the deduction of the CDSC for each of Class B and Class C which, 
if reflected, would reduce the performance quotes. For example, the total 
return of the Fund may be calculated in the manner described above, but 
without deduction of any applicable sales charge. Based on this calculation, 
the total returns for each Class for the period September 26, 1997 
(commencement of operations) through February 28, 1998 were 11.47%, 11.09%, 
11.08% and 11.53% for Class A, Class B, Class C and Class D, respectively. 

   The Fund may also advertise the growth of hypothetical investments of 
$10,000, $50,000 and $100,000 in each Class of shares of the Fund by adding 1 
to the Fund's aggregate total return to date (expressed as a decimal and 
without taking into account the effect of any applicable CDSC) and 
multiplying by $9,475, $48,000 and $97,000 in the case of Class A 
(investments of $10,000, $50,000 and $100,000 adjusted for the initial sales 
charge) or by $10,000, $50,000 and $100,000 in each Class at inception of the 
Class would have grown to the following amounts at February 28, 1998: 

<TABLE>
<CAPTION>
                           INVESTMENT AT INCEPTION OF:    
             INCEPTION    -----------------------------
CLASS          DATE:      $10,000   $50,000    $100,000 
- -----          -----      -------   -------    --------
<S>           <C>         <C>       <C>        <C>      
Class A  ..   9/26/97     $10,562   $53,506    $108,126 
Class B  ..   9/26/97      11,109    55,545     111,090 
Class C  ..   9/26/97      11,108    55,540     111,080 
Class D  ..   9/26/97      11,153    55,765     111,530 
</TABLE>

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

SHARES OF THE FUND 
- ----------------------------------------------------------------------------- 

   The shareholders of the Fund are entitled to a full vote for each full 
share of beneficial interest held. The Fund is authorized to issue an 
unlimited number of shares of beneficial interest. The Trustees themselves 
have the power to alter the number and the terms of office of the Trustees 
(as provided for in the Declaration of Trust), and they may at any time 
lengthen or shorten their own terms or make their terms of unlimited duration 
and appoint their own successors, provided that always at least a majority of 
the Trustees has been elected by the shareholders of the Fund. Under certain 
circumstances the Trustees may be removed by action of the Trustees. The 
shareholders also have the right under certain circumstances to remove the 
Trustees. The voting rights of shareholders are not cumulative, so that 
holders of more than 50 percent of the shares voting can, if they choose, 
elect all Trustees being selected, while the holders of the remaining shares 
would be unable to elect any Trustees. 

   The Declaration of Trust permits the Trustees to authorize the creation of 
additional series of shares (the proceeds of which would be invested in 
separate, independently managed portfolios) and additional classes of shares 
within any series. The Trustees have not presently authorized any such 
additional series or classes of shares other than as set forth in the 
Prospectus. 

                                       34
<PAGE>

   The Declaration of Trust further provides that no Trustee, officer, 
employee or agent of the Fund is liable to the Fund or to a shareholder, nor 
is any Trustee, officer, employee or agent liable to any third persons in 
connection with the affairs of the Fund, except as such liability may arise 
from his/her or its own bad faith, willful misfeasance, gross negligence or 
reckless disregard of his/her or its duties. It also provides that all third 
persons shall look solely to the Fund property for satisfaction of claims 
arising in connection with the affairs of the Fund. With the exceptions 
stated, the Declaration of Trust provides that a Trustee, officer, employee 
or agent is entitled to be indemnified against all liability in connection 
with the affairs of the Fund. 

   The Fund is authorized to issue an unlimited number of shares of 
beneficial interest. 

   The Fund shall be of unlimited duration subject to the provisions in the 
Declaration of Trust concerning termination by action of the shareholders or 
the Trustees. 

CUSTODIAN AND TRANSFER AGENT 
- ----------------------------------------------------------------------------- 

   The Bank of New York, 90 Washington Street, New York, NY 10286, is the 
Custodian of the Fund's assets. Any of the Fund's cash balances with the 
Custodian in excess of $100,000 are unprotected by federal deposit insurance. 
Such balances may, at times, be substantial. 

   Morgan Stanley Dean Witter Trust FSB ("MSDW Trust"), Harborside Financial 
Center, Plaza Two, Jersey City, New Jersey 07311 is the Transfer Agent of the 
Fund's shares and Dividend Disbursing Agent for payment of dividends and 
distributions on Fund shares and Agent for shareholders under various 
investment plans described herein. MSDW Trust is an affiliate of Dean Witter 
InterCapital Inc., the Fund's Investment Manager, and Dean Witter 
Distributors Inc., the Fund's Distributor. As Transfer Agent and Dividend 
Disbursing Agent, MSDW Trust's responsibilities include maintaining 
shareholder accounts, disbursing cash dividends and reinvesting dividends, 
processing account registration changes, handling purchase and redemption 
transactions, mailing prospectuses and reports, mailing and tabulating 
proxies, processing share certificate transactions, and maintaining 
shareholder records and lists. For these services MSDW Trust receives a per 
shareholder account fee from the Fund. 

INDEPENDENT ACCOUNTANTS 
- ----------------------------------------------------------------------------- 

   Price Waterhouse LLP serves as the independent accountants of the Fund. 
The independent accountants are responsible for auditing the annual financial 
statements of the Fund. 

REPORTS TO SHAREHOLDERS 
- ----------------------------------------------------------------------------- 

   The Fund will send to shareholders, at least semi-annually, reports 
showing the Fund's portfolio and other information. An annual report, 
containing financial statements audited by independent account-ants, will be 
sent to shareholders each year. 

   The Fund's fiscal year ends on August 31. The financial statements of the 
Fund must be audited at least once a year by independent accountants whose 
selection is made annually by the Fund's Board of Trustees. 

LEGAL COUNSEL 
- ----------------------------------------------------------------------------- 

   Barry Fink, Esq., who is an officer and the General Counsel of the 
Investment Manager, is an officer and the General Counsel of the Fund. 

                                       35
<PAGE>

EXPERTS 
- ----------------------------------------------------------------------------- 

   The Statement of Assets and Liabilities of the Fund included in this 
Statement of Additional Information and incorporated by reference in the 
Prospectus has been so included and incorporated in reliance on the report of 
Price Waterhouse LLP, independent accountants, given on the authority of said 
firm as experts in auditing and accounting. 

REGISTRATION STATEMENT 
- ----------------------------------------------------------------------------- 

   This Statement of Additional Information and the Prospectus do not contain 
all of the information set forth in the Registration Statement the Fund has 
filed with the Securities and Exchange Commission. The complete Registration 
Statement may be obtained from the Securities and Exchange Commission upon 
payment of the fee prescribed by the rules and regulations of the Commission. 

                                       36
<PAGE>

REPORT OF INDEPENDENT ACCOUNTANTS 
- ----------------------------------------------------------------------------- 

To the Shareholder and Trustees of 
Dean Witter S&P 500 Index Fund 

In our opinion, the accompanying statement of assets and liabilities presents 
fairly, in all material respects, the financial position of Dean Witter S&P 
500 Index Fund (the "Fund") at July 28, 1997, in conformity with generally 
accepted accounting principles. This financial statement is the 
responsibility of the Fund's management; our responsibility is to express an 
opinion on this financial statement based on our audit. We conducted our 
audit of this financial statement in accordance with generally accepted 
auditing standards which require that we plan and perform the audit to obtain 
reasonable assurance about whether the financial statement is free of 
material misstatement. An audit includes examining, on a test basis, evidence 
supporting the amounts and disclosures in the financial statement, assessing 
the accounting principles used and significant estimates made by management, 
and evaluating the overall financial statement presentation. We believe that 
our audit provides a reasonable basis for the opinion expressed above. 

PRICE WATERHOUSE LLP 
1177 Avenue of the Americas 
New York, New York 
July 30, 1997 

                                       37
<PAGE>

DEAN WITTER S&P 500 INDEX FUND 
Statement of Assets and Liabilities at July 28, 1997 
- ----------------------------------------------------------------------------- 

<TABLE>
<CAPTION>
<S>                                                        <C>
ASSETS: 
 Cash....................................................  $100,000 
 Deferred organizational expenses (Note 1)...............    49,500 
                                                           --------
   Total Assets..........................................   149,500 
                                                           --------
LIABILITIES: 
 Organizational expenses payable (Note 1)................    49,500 
 Commitments (Notes 1 and 2).............................     -0- 
                                                           --------
   Total Liabilities.....................................    49,500 
                                                           --------
   Net Assets............................................  $100,000 
                                                           ========
CLASS A SHARES: 
Net Assets...............................................  $ 25,000 
Shares Outstanding (unlimited authorized, $.01 par 
 value)..................................................     2,500 
  NET ASSET VALUE PER SHARE..............................  $  10.00 
                                                           ========
  MAXIMUM OFFERING PRICE 
   (net asset value plus 5.5% of net asset value) .......  $  10.55 
                                                           ========
CLASS B SHARES: 
Net Assets...............................................  $ 25,000 
Shares Outstanding (unlimited authorized, $.01 par 
 value)..................................................     2,500 
  NET ASSET VALUE PER SHARE..............................  $  10.00 
                                                           ========
CLASS C SHARES: 
Net Assets...............................................  $ 25,000 
Shares Outstanding (unlimited authorized, $.01 par 
 value)..................................................     2,500 
  NET ASSET VALUE PER SHARE..............................  $  10.00 
                                                           ========
CLASS D SHARES: 
Net Assets...............................................  $ 25,000 
Shares Outstanding (unlimited authorized, $.01 par 
 value)..................................................     2,500 
  NET ASSET VALUE PER SHARE..............................  $  10.00 
                                                           ========
</TABLE>

- --------------
   NOTE 1--Dean Witter S&P 500 Index Fund (the "Fund") was organized as a 
Massachusetts business trust on June 18, 1997. To date the Fund has had no 
transactions other than those relating to organizational matters and the sale 
of 2,500 shares of beneficial interest for $25,000 of each class to Dean 
Witter InterCapital Inc. (the "Investment Manager"). The Fund is registered 
under the Investment Company Act of 1940, as amended (the "Act"), as a 
diversified, open-end management investment company. The investment objective 
of the Fund is to provide investment results that, before expenses, 
correspond to the total return of the Standard & Poor's 500 Composite Stock 
Price Index. Organizational expenses of the Fund incurred prior to the 
offering of the Fund's shares will be paid by the Investment Manager. It is 
currently estimated that the Investment Manager will incur and be reimbursed 
by the Fund for approximately $49,500 in organizational expenses. These 
expenses will be deferred and amortized by the Fund on the straight-line 
method over a period not to exceed five years from the date of commencement 
of the Fund's operations. In the event that at any time during the five year 
period beginning with the date of the commencement of operations the initial 
shares acquired by the Investment Manager prior to such date are redeemed, by 
any holder thereof, the redemption proceeds payable in respect of such shares 
will be reduced by the pro rata share (based on the proportionate share of 
the initial shares redeemed to the total number of original shares 
outstanding at the time of redemption) of the then unamortized deferred 
organizational expenses as of the date of such redemption. In the event that 
the Fund liquidates before the deferred organizational expenses are fully 
amortized, the Investment Manager shall bear such unamortized deferred 
organizational expenses. 

                                       38
<PAGE>

   NOTE 2--The Fund has entered into an investment management agreement with 
the Investment Manager. Certain officers and/or trustees of the Fund are 
officers and/or directors of the Investment Manager. The Fund has retained 
the Investment Manager to manage the investment of the Fund's assets, 
including the placing of orders for the purchase and sale of portfolio 
securities. Under the terms of the Investment Management Agreement, the 
Investment Manager maintains certain of the Fund's books and records and 
furnishes, at its own expense, such office space, facilities, equipment, 
supplies, clerical help and bookkeeping and certain legal services as the 
Fund may reasonably require in the conduct of its business. In addition, the 
Investment Manager pays the salaries of all personnel, including officers of 
the Fund, who are employees of the Investment Manager. The Investment Manager 
also bears the cost of the Fund's telephone service, heat, light, power and 
other utilities. 

   As full compensation for the services and facilities furnished to the Fund 
and expenses of the Fund incurred by the Investment Manager, the Fund will 
pay the Investment Manager monthly compensation calculated daily by applying 
the annual rate of 0.40% to the Fund's daily net assets. The Investment 
Manager has agreed to assume all expenses (except for brokerage and Plan of 
Distribution 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. 

   Shares of the Fund will be distributed by Dean Witter Distributors Inc. 
(the "Distributor"), an affiliate of the Investment Manager, during the 
initial and continuous offering of the Fund's shares. The Fund has adopted a 
Plan of Distribution pursuant to Rule 12b-1 under the Act (the "Plan") with 
respect to the distribution of Class A, Class B and Class C shares of the 
Fund. The Plan provides that the Distributor will bear the expense of all 
promotional and distribution related activities on behalf of those shares, 
including the payment of commissions for sales of such shares and incentive 
compensation to and expenses of Dean Witter Reynolds Inc. ("DWR"), an 
affiliate of the Investment Manager, 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, with 
respect to Class B, the Distributor may utilize fees paid pursuant to the 
Plan to compensate DWR and others for their opportunity costs in advancing 
such amounts, which compensation would be in the form of a carrying charge on 
any unreimbursed distribution expenses incurred. 

   To compensate the Distributor for the services provided and for the 
expenses borne by the Distributor and others under the Plan, Class A, Class B 
and Class C will pay the Distributor compensation accured daily and payable 
monthly at the annual rate 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 Class C. In 
the case of Class B Shares, provided that the Plan continues in effect, any 
cumulative expenses incurred by the Distributor but not yet recovered may be 
recovered through the payment of future distribution fees from the Fund 
pursuant to the Plan and contingent deferred sales charges paid by investors 
upon redemption of Class B shares. Although there is no legal obligation for 
the Fund to pay expenses incurred in excess of payments made to the 
Distributor under the Plan and the proceeds of contingent deferred sales 
charges paid by investors upon redemption of shares, if for any reason the 
Plan is terminated, the Trustees will consider at that time the manner in 
which to treat such expenses. In the case of Class A shares and Class C 
shares, expenses incurred pursuant to the Plan in any calendar year in excess 
of 0.25% or 1.00% of the average daily net assets of Class A or Class C, 
respectively, will not be reimbursed by the Fund through payments in any 
subsequent year, except that expenses representing a gross sales credit to 
account executives may be reimbursed in the subsequent calendar year. 

   Dean Witter Trust FSB (the "Transfer Agent"), an affiliate of the 
Investment Manager and the Distributor, is the transfer agent of the Fund's 
shares, dividend disbursing agent for payment of dividends and distributions 
on Fund shares and agent for shareholders under various investment plans. 

   The Investment Manager has undertaken to assume all Fund expenses (except 
for the Plan fee and brokerage fees) and to waive the compensation provided 
for in its investment management agreement for services rendered until such 
time as the Fund has $50 million of net assets or until six months from the 
date of commencement of the Fund's operations, whichever occurs first. 

                                       39




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