DEAN WITTER PRECIOUS METALS & MINERALS TRUST
485BPOS, 1997-12-30
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<PAGE>
   
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON DECEMBER 30, 1997
    
 
   
                                                      REGISTRATION NOS. 33-32872
    
 
   
                                                                        811-5988
    
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                ----------------
 
                                   FORM N-1A
                             REGISTRATION STATEMENT
                        UNDER THE SECURITIES ACT OF 1933                     /X/
 
                                                     PRE-EFFECTIVE AMENDMENT NO.
- ---                                                                          / /
   
                         POST-EFFECTIVE AMENDMENT NO. 9                      /X/
    
                                     AND/OR
              REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY
                                  ACT OF 1940                                /X/
   
                                AMENDMENT NO. 10                             /X/
    
                              -------------------
 
                 DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
 
                        (A MASSACHUSETTS BUSINESS TRUST)
               (EXACT NAME OF REGISTRANT AS SPECIFIED IN CHARTER)
 
                             TWO WORLD TRADE CENTER
                            NEW YORK, NEW YORK 10048
                    (ADDRESS OF PRINCIPAL EXECUTIVE OFFICE)
       REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (212) 392-1600
 
                                BARRY FINK, ESQ.
                             TWO WORLD TRADE CENTER
                            NEW YORK, NEW YORK 10048
                    (NAME AND ADDRESS OF AGENT FOR SERVICE)
                            ------------------------
 
                                    COPY TO:
                            DAVID M. BUTOWSKY, ESQ.
                             GORDON ALTMAN BUTOWSKY
                             WEITZEN SHALOV & WEIN
                              114 WEST 47TH STREET
                            NEW YORK, NEW YORK 10036
                                ----------------
 
                 APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:
 
 As soon as practicable after this Post-Effective Amendment becomes effective.
 
 IT IS PROPOSED THAT THIS FILING WILL BECOME EFFECTIVE (CHECK APPROPRIATE BOX)
 
   
        _X_ immediately upon filing pursuant to paragraph (b)
    
 
   
        ___ on (date) pursuant to paragraph (b)
    
 
        ___ 60 days after filing pursuant to paragraph (a)
 
   
        ___ on (date) pursuant to paragraph (a) of rule 485.
    
 
           AMENDING THE PROSPECTUS AND UPDATING FINANCIAL STATEMENTS
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                 DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
 
                             CROSS-REFERENCE SHEET
 
                                   FORM N-1A
 
   
<TABLE>
<CAPTION>
ITEM                                                                         CAPTION
- ---------------------------------------------  -------------------------------------------------------------------
 
<S>                                            <C>
PART A                                                                     PROSPECTUS
 1.  ........................................  Cover Page
 
 2.  ........................................  Summary of Fund Expenses; Prospectus Summary
 
 3.  ........................................  Financial Highlights; Performance Information
 
 4.  ........................................  Investment Objective and Policies; The Fund and its Management;
                                                Cover Page; Investment Restrictions; Prospectus Summary; Risk
                                                Considerations and Financial Highlights
 
 5.  ........................................  The Fund and Its Management; Back Cover; Investment Objective and
                                                Policies
 
 6.  ........................................  Dividends, Distributions and Taxes; Additional Information
 
 7.  ........................................  Purchase of Fund Shares; Shareholder Services
 
 8.  ........................................  Purchase of Fund Shares; Redemptions and Repurchases; Shareholder
                                                Services
 
 9.  ........................................  Not Applicable
 
PART B                                                         STATEMENT OF ADDITIONAL INFORMATION
10.  ........................................  Cover Page
 
11.  ........................................  Table of Contents
 
12.  ........................................  The Fund and Its Management
 
13.  ........................................  Investment Practices and Policies; Investment Restrictions;
                                                Portfolio Transactions and Brokerage
 
14.  ........................................  The Fund and its Management; Trustees and Officers
 
15.  ........................................  Trustees and Officers
 
16.  ........................................  The Fund and Its Management; Purchase of Fund Shares; Custodian and
                                                Transfer Agent; Independent Accountants
 
17.  ........................................  Portfolio Transactions and Brokerage
 
18.  ........................................  Description of Shares; Validity of Shares of Beneficial Interest
 
19.  ........................................  Purchase of Fund Shares; Redemptions and Repurchases; Financial
                                                Statements; Shareholder Services
 
20.  ........................................  Dividends, Distributions and Taxes
 
21.  ........................................  The Distributor; Purchase of Fund Shares
 
22.  ........................................  Performance Information
 
23.  ........................................  Experts; Financial Statements
</TABLE>
    
 
PART C
 
    Information required to be included in Part C is set forth under the
appropriate item, so numbered, in Part C of this Registration Statement.
<PAGE>
   
              PROSPECTUS
              DECEMBER 30, 1997
    
 
              Dean Witter Precious Metals and Minerals Trust (the "Fund") is an
open-end diversified management investment company, whose investment objective
is capital appreciation. The Fund will seek to achieve its investment objective
by investing in the securities of foreign and domestic companies engaged in the
exploration, mining, fabrication, processing, distribution or trading of
precious metals and minerals or in companies engaged in financing, managing,
controlling or operating companies engaged in these activities and also by
investing a portion of its assets in gold, silver, platinum and palladium
bullion and coins. (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 December 30, 1997, which has been filed with
the Securities and Exchange Commission, and which is available at no charge upon
request of the Fund at the address or telephone numbers listed on this page. The
Statement of Additional Information is incorporated herein by reference.
    
 
     DEAN WITTER DISTRIBUTORS INC.
      DISTRIBUTOR
 
      TABLE OF CONTENTS
 
   
Prospectus Summary/2
Summary of Fund Expenses/4
Financial Highlights/6
The Fund and Its Management/9
Investment Objective and Policies/9
  Risk Considerations/11
Investment Restrictions/16
Purchase of Fund Shares/17
Shareholder Services/28
Redemptions and Repurchases/31
Dividends, Distributions and Taxes/32
Performance Information/33
Additional Information/34
    
 
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
    Precious Metals and Minerals Trust
    Two World Trade Center
    New York, New York 10048
    (212) 392-2550 or
    (800) 869-NEWS (toll-free)
<PAGE>
PROSPECTUS SUMMARY
- --------------------------------------------------------------------------------
 
   
<TABLE>
<S>                 <C>
The                 The Fund is organized as a Trust, commonly known as a Massachusetts business trust, and is an open-end,
Fund                diversified management investment company. The Fund invests in the securities of foreign and domestic companies
                    engaged in the exploration, mining, fabrication, processing, distribution or trading of precious metals and
                    minerals or in companies engaged in financing, managing, controlling or operating companies engaged in these
                    activities. The Fund also invests in gold, silver, platinum and palladium bullion and coins directly.
- ------------------------------------------------------------------------------------------------------------------------------------
Shares Offered      Shares of beneficial interest with $0.01 par value (see page 32). The Fund offers four Classes of shares, each
                    with a different combination of sales charges, ongoing fees and other features (see pages 17-27).
- ------------------------------------------------------------------------------------------------------------------------------------
Minimum             The minimum initial investment for each Class is $1,000 ($100 if the account was opened through EasyInvest-SM-).
Purchase            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 17).
- ------------------------------------------------------------------------------------------------------------------------------------
Investment          The investment objective of the Fund is to provide long-term capital appreciation.
Objective
- ------------------------------------------------------------------------------------------------------------------------------------
Investment          Dean Witter InterCapital Inc. ("InterCapital"), the Investment Manager of the Fund, and its wholly-owned
Manager             subsidiary, Dean Witter Services Company Inc., serve in various investment management, advisory, management and
                    administrative capacities to 102 investment companies and other portfolios with assets under management of
                    approximately $102.4 billion at November 30, 1997 (see page 9).
- ------------------------------------------------------------------------------------------------------------------------------------
Management          The Investment Manager receives a monthly fee at the annual rate of 0.80% of daily net assets. This fee is
Fee                 higher than that paid by most other investment companies (see page 9).
- ------------------------------------------------------------------------------------------------------------------------------------
Distributor and     Dean Witter Distributors Inc. (the "Distributor"). The Fund has adopted a distribution plan pursuant to Rule
Distribution Fee    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 17 and 26).
- ------------------------------------------------------------------------------------------------------------------------------------
Alternative         Four classes of shares are offered:
Purchase
Arrangements        - Class A shares are offered with a front-end sales charge, starting at 5.25% and reduced for larger purchases.
                    Investments of $1 million or more (and investments by certain other limited categories of investors) are not
                    subject to any sales charge at the time of purchase but a contingent deferred sales charge ("CDSC") of 1.0% may
                    be imposed on redemptions within one year of purchase. The Fund is authorized to reimburse the Distributor for
                    specific expenses incurred in promoting the distribution of the Fund's Class A shares and servicing shareholder
                    accounts pursuant to the Fund's 12b-1 Plan. Reimbursement may in no event exceed an amount equal to payments at
                    an annual rate of up to 0.25% of average daily net assets of the Class (see pages 17, 20 and 26).
</TABLE>
    
 
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                                       2
<PAGE>
- --------------------------------------------------------------------------------
   
<TABLE>
<S>                 <C>
                    - Class B shares are offered without a front-end sales charge, but will in most cases be subject to a CDSC
                    (scaled down from 5.0% to 1.0%) if redeemed within six years after purchase. The CDSC will be imposed on any
                    redemption of shares if after such redemption the aggregate current value of a Class B account with the Fund
                    falls below the aggregate amount of the investor's purchase payments made during the six years preceding the
                    redemption. A different CDSC schedule applies to investments by certain qualified plans. Class B shares are also
                    subject to a 12b-1 fee assessed at the annual rate of 1.0% of the lesser of: (a) the average daily net sales of
                    the Fund's Class B shares or (b) the average daily net assets of Class B. All shares of the Fund held prior to
                    July 28, 1997 have been designated Class B shares. Shares held before May 1, 1997 will convert to Class A shares
                    in May, 2007. In all other instances, Class B shares convert to Class A shares approximately ten years after the
                    date of the original purchase (see pages 17, 23 and 26).
 
                    - 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 up to 1.0% of average daily net assets of the Class (see pages 17, 25 and 26).
 
                    - 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 17, 25 and 26).
- ------------------------------------------------------------------------------------------------------------------------------------
Dividends           Dividends from net investment income and distributions from net capital gains, if any, are paid at least once
                    per year. The Fund 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 (see page 20). Shares acquired by dividend and distribution reinvestment will not be subject to any sales
                    charge or CDSC (see pages 28 and 32).
- ------------------------------------------------------------------------------------------------------------------------------------
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, if after twelve months the shareholder has invested less than
                    $1,000 in the account (see page 31).
- ------------------------------------------------------------------------------------------------------------------------------------
Risks               The net asset value of the Fund's shares will fluctuate with changes in the market value of its portfolio
                    securities and with fluctuations in the prices of precious metals and minerals. The prices of precious metals
                    and minerals are affected by various world-wide economic, financial and political factors and such prices may be
                    subject to sharp fluctuations over short periods of time (see page 11). Additionally, the Fund's investments in
                    foreign securities involve certain risks due to changes in currency exchange rates, foreign securities exchange
                    controls and foreign tax rates (see page 12). The Fund's use of options and futures transactions may also
                    involve special risks (see page 12).
</TABLE>
    
 
- --------------------------------------------------------------------------------
 
  THE ABOVE IS QUALIFIED IN ITS ENTIRETY BY THE DETAILED INFORMATION APPEARING
         ELSEWHERE IN THE PROSPECTUS AND IN THE STATEMENT OF ADDITIONAL
                                  INFORMATION.
 
                                       3
<PAGE>
SUMMARY OF FUND EXPENSES
- --------------------------------------------------------------------------------
 
   
    The following table illustrates all expenses and fees that a shareholder of
the Fund will incur. The expenses and fees set forth in the table are based on
the expenses and fees for the fiscal year ended October 31, 1997.
    
 
   
<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.................................................................   0.80%       0.80%     0.80%       0.80%
12b-1 Fees (5) (6)..............................................................   0.25%       1.00%     1.00%       None
Other Expenses..................................................................   0.56%       0.56%     0.56%       0.56%
Total Fund Operating Expenses (7)...............................................   1.61%       2.36%     2.36%       1.36%
</TABLE>
    
 
- ------------
(1) REDUCED FOR PURCHASES OF $25,000 AND OVER (SEE "PURCHASE OF FUND SHARES --
    INITIAL SALES CHARGE ALTERNATIVE -- CLASS A SHARES").
 
(2) INVESTMENTS THAT ARE NOT SUBJECT TO ANY SALES CHARGE AT THE TIME OF PURCHASE
    ARE SUBJECT TO A CDSC OF 1.00% THAT WILL BE IMPOSED ON REDEMPTIONS MADE
    WITHIN ONE YEAR AFTER PURCHASE, EXCEPT FOR CERTAIN SPECIFIC CIRCUMSTANCES
    (SEE "PURCHASE OF FUND SHARES -- INITIAL SALES CHARGE ALTERNATIVE -- CLASS A
    SHARES").
 
(3) THE CDSC IS SCALED DOWN TO 1.00% DURING THE SIXTH YEAR, REACHING ZERO
    THEREAFTER.
 
(4) ONLY APPLICABLE TO REDEMPTIONS MADE WITHIN ONE YEAR AFTER PURCHASE (SEE
    "PURCHASE OF FUND SHARES -- LEVEL LOAD ALTERNATIVE -- CLASS C SHARES").
 
(5) 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").
 
   
(7) THERE WERE NO OUTSTANDING SHARES OF CLASS A, CLASS C OR CLASS D PRIOR TO
    JULY 28, 1997. ACCORDINGLY, "TOTAL FUND OPERATING EXPENSES," AS SHOWN ABOVE
    WITH RESPECT TO THOSE CLASSES, ARE ESTIMATES BASED UPON THE SUM OF 12B-1
    FEES, MANAGEMENT FEES AND ESTIMATED "OTHER EXPENSES."
    
 
                                       4
<PAGE>
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
EXAMPLES                                            1 Year    3 Years   5 Years   10 Years
- --------------------------------------------------  -------   -------   -------   --------
<S>                                                 <C>       <C>       <C>       <C>
You would pay the following expenses on a $1,000
 investment assuming (1) a 5% annual return and
 (2) redemption at the end of each time period:
    Class A.......................................    $68      $101      $136       $234
    Class B.......................................    $74      $104      $146       $270
    Class C.......................................    $34      $ 74      $126       $270
    Class D.......................................    $14      $ 43      $ 75       $164
 
You would pay the following expenses on the same
 $1,000 investment assuming no redemption at the
 end of the period:
    Class A.......................................    $68      $101      $136       $234
    Class B.......................................    $24      $ 74      $126       $270
    Class C.......................................    $24      $ 74      $126       $270
    Class D.......................................    $14      $ 43      $ 75       $164
</TABLE>
    
 
    THE ABOVE EXAMPLES SHOULD NOT BE CONSIDERED A REPRESENTATION OF PAST OR
FUTURE EXPENSES OR PERFORMANCE. ACTUAL EXPENSES OF EACH CLASS MAY BE GREATER OR
LESS THAN THOSE SHOWN.
 
    The purpose of this table is to assist the investor in understanding the
various costs and expenses that an investor in the Fund will bear directly or
indirectly. For a more complete description of these costs and expenses, see
"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
- --------------------------------------------------------------------------------
 
   
    The following ratios and per share data for a share of beneficial interest
outstanding throughout each period have been audited by Price Waterhouse LLP,
independent accountants. The financial highlights should be read in conjunction
with the financial statements, notes thereto, and the unqualified report of
independent accountants which are contained in the Statement of Additional
Information. Further information about the performance of the Fund is contained
in the Fund's Annual Report to Shareholders, which may be obtained without
charge upon request of the Fund.
    
 
   
<TABLE>
<CAPTION>
                                                                                                                     FOR THE
                                                                                                                     PERIOD
                                                                                                                    AUGUST 6,
                                                                                                                      1990*
                                                     FOR THE YEAR ENDED OCTOBER 31,                                  THROUGH
                            ---------------------------------------------------------------------------------      OCTOBER 31,
CLASS B SHARES              1997**++      1996        1995        1994        1993        1992        1991            1990
                            ---------   ---------   ---------   ---------   ---------   ---------   ---------     -------------
<S>                         <C>         <C>         <C>         <C>         <C>         <C>         <C>           <C>
PER SHARE OPERATING
 PERFORMANCE:
Net asset value, beginning
 of period................  $   11.14   $    9.77   $   11.45   $   10.80   $    7.87   $    8.59   $    8.57         $  10.00
                            ---------   ---------   ---------   ---------   ---------   ---------   ---------     -------------
Net investment income
 (loss)...................      (0.10)      (0.10)      (0.08)      (0.06)      (0.04)      (0.05)       0.06             0.05
Net realized and
 unrealized gain (loss)...      (3.35)       1.66       (1.38)       0.73        2.97       (0.62)       0.03            (1.48)
                            ---------   ---------   ---------   ---------   ---------   ---------   ---------     -------------
Total from investment
 operations...............      (3.45)       1.56       (1.46)       0.67        2.93       (0.67)       0.09            (1.43)
                            ---------   ---------   ---------   ---------   ---------   ---------   ---------     -------------
Less dividends and
 distributions from:
   Net investment
   income.................      (0.13)         --          --          --          --       (0.04)      (0.07)              --
   Net realized gain......      (0.71)      (0.19)      (0.22)      (0.02)         --       (0.01)         --               --
                            ---------   ---------   ---------   ---------   ---------   ---------   ---------     -------------
Total dividends and
 distributions............      (0.84)      (0.19)      (0.22)      (0.02)         --       (0.05)      (0.07)              --
                            ---------   ---------   ---------   ---------   ---------   ---------   ---------     -------------
Net asset value, end of
 period...................  $    6.85   $   11.14   $    9.77   $   11.45   $   10.80   $    7.87   $    8.59         $   8.57
                            ---------   ---------   ---------   ---------   ---------   ---------   ---------     -------------
                            ---------   ---------   ---------   ---------   ---------   ---------   ---------     -------------
TOTAL INVESTMENT
 RETURN+..................   (33.29)%      15.93%    (12.78)%       6.18%      37.23%     (7.97)%       1.23%         (14.30)%(1)
RATIOS TO AVERAGE NET
 ASSETS:
Expenses..................      2.36%       2.27%       2.29%       2.28%       2.79%       3.30%       2.18%(4)         1.49%(2)(3)
Net investment income
 (loss)...................    (1.13)%     (0.84)%     (0.70)%     (0.87)%     (1.07)%     (0.74)%       0.93%(4)         2.99%(2)(3)
SUPPLEMENTAL DATA:
Net assets, end of period,
 in thousands.............    $37,964     $60,841     $55,448     $73,444     $45,204     $15,135     $11,246           $5,843
Portfolio turnover rate...        53%         46%         23%         46%         25%          9%         11%               --
Average commission rate
 paid.....................    $0.0245     $0.0217          --          --          --          --          --               --
</TABLE>
    
 
- -------------
   
 * COMMENCEMENT OF OPERATIONS.
    
   
 ** PRIOR TO JULY 28, 1997, THE FUND ISSUED ONE CLASS OF SHARES. ALL SHARES OF
    THE FUND HELD PRIOR TO THAT DATE HAVE BEEN DESIGNATED CLASS B SHARES.
    
   
 ++ THE PER SHARE AMOUNTS WERE COMPUTED USING AN AVERAGE NUMBER OF SHARES
    OUTSTANDING DURING THE PERIOD.
    
   
 + DOES NOT REFLECT THE DEDUCTION OF SALES CHARGE. CALCULATED BASED ON THE NET
   ASSET VALUE AS OF THE LAST BUSINESS DAY OF THE PERIOD.
    
   
(1) NOT ANNUALIZED.
    
   
(2) ANNUALIZED.
    
   
(3) IF THE FUND HAD BORNE ALL EXPENSES THAT WERE ASSUMED OR WAIVED BY THE
    INVESTMENT MANAGER (AFTER APPLICATION OF THE FUND'S EXPENSE LIMITATION), THE
    ABOVE ANNUALIZED EXPENSE AND NET INVESTMENT INCOME RATIOS WOULD HAVE BEEN
    3.50% AND 0.98%, RESPECTIVELY.
    
   
(4) IF THE FUND HAD BORNE ALL EXPENSES THAT WERE ASSUMED OR WAIVED BY THE
    INVESTMENT MANAGER (AFTER APPLICATION OF THE FUND'S EXPENSE LIMITATION), THE
    ABOVE ANNUALIZED EXPENSE AND NET INVESTMENT INCOME RATIOS WOULD HAVE BEEN
    3.50% AND (0.39)%, RESPECTIVELY.
    
 
                                       6
<PAGE>
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                         FOR THE PERIOD
                                                                         JULY 28, 1997*
                                                                            THROUGH
                                                                          OCTOBER 31,
CLASS A SHARES                                                               1997++
                                                                        ----------------
<S>                                                                     <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..................................      $  7.95
                                                                             ------
Net realized and unrealized loss......................................        (1.09)
                                                                             ------
Net asset value, end of period........................................      $  6.86
                                                                             ------
                                                                             ------
TOTAL INVESTMENT RETURN+..............................................       (13.71)%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         1.61%(2)
Net investment loss...................................................        (0.08)%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................          $32
Portfolio turnover rate...............................................           53%
Average commission rate paid..........................................      $0.0245
 
CLASS C SHARES
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..................................      $  7.95
                                                                             ------
Net investment loss...................................................        (0.02)
Net realized and unrealized loss......................................        (1.09)
                                                                             ------
Total from investment operations......................................        (1.11)
                                                                             ------
Net asset value, end of period........................................      $  6.84
                                                                             ------
                                                                             ------
TOTAL INVESTMENT RETURN+..............................................      (13.96)%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         2.37%(2)
Net investment loss...................................................        (0.79)%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................         $475
Portfolio turnover rate...............................................           53%
Average commission rate paid..........................................      $0.0245
</TABLE>
    
 
- -------------
   
 * THE DATE SHARES WERE FIRST ISSUED.
    
   
 ++ THE PER SHARE AMOUNTS WERE COMPUTED USING AN AVERAGE NUMBER OF SHARES
    OUTSTANDING DURING THE PERIOD.
    
   
 + DOES NOT REFLECT THE DEDUCTION OF SALES CHARGE. CALCULATED BASED ON THE NET
   ASSET VALUE AS OF THE LAST BUSINESS DAY OF THE PERIOD.
    
   
(1) NOT ANNUALIZED.
    
   
(2) ANNUALIZED.
    
 
                                       7
<PAGE>
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                         FOR THE PERIOD
                                                                         JULY 28, 1997*
                                                                            THROUGH
                                                                          OCTOBER 31,
CLASS D SHARES                                                               1997++
                                                                        ----------------
<S>                                                                     <C>
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..................................      $  7.95
                                                                             ------
Net realized and unrealized loss......................................        (1.09)
                                                                             ------
Net asset value, end of period........................................      $  6.86
                                                                             ------
                                                                             ------
 
TOTAL INVESTMENT RETURN+..............................................       (13.71)%(1)
 
RATIOS TO AVERAGE NET ASSETS:
Expenses..............................................................         1.35%(2)
Net investment income.................................................         0.22%(2)
 
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...............................           $9
Portfolio turnover rate...............................................           53%
Average commission rate paid..........................................      $0.0245
</TABLE>
    
 
- -------------
   
 * THE DATE SHARES WERE FIRST ISSUED.
    
 
   
 ++ THE PER SHARE AMOUNTS WERE COMPUTED USING AN AVERAGE NUMBER OF SHARES
    OUTSTANDING DURING THE PERIOD.
    
 
   
 + CALCULATED BASED ON THE NET ASSET VALUE AS OF THE LAST BUSINESS DAY OF THE
   PERIOD.
    
 
   
(1) NOT ANNUALIZED.
    
 
   
(2) ANNUALIZED.
    
 
                                       8
<PAGE>
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
    Dean Witter Precious Metals and Minerals Trust (the "Fund") is an open-end,
diversified management investment company. The Fund is a trust of the type
commonly known as a "Massachusetts business trust" and was organized under the
laws of Massachusetts on December 28, 1989.
 
    Dean Witter InterCapital Inc. ("InterCapital" or the "Investment Manager"),
whose address is Two World Trade Center, New York, New York 10048, is the Fund's
Investment Manager. The Investment Manager, which was incorporated in July,
1992, is a wholly-owned subsidiary of Morgan Stanley, Dean Witter, Discover &
Co., a preeminent global financial services firm that maintains leading market
positions in each of its three primary businesses -- securities, asset
management and credit services.
 
   
    InterCapital and its wholly-owned subsidiary, Dean Witter Services Company
Inc., serve in various investment management, advisory, management and
administrative capacities to 102 investment companies, thirty of which are
listed on the New York Stock Exchange, with combined assets of approximately
$98.6 billion at November 30, 1997. The Investment Manager also manages
portfolios of pension plans, other institutions and individuals which aggregated
approximately $3.8 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 or under the direction of the
Investment Manager to ensure that the Fund's general investment policies and
programs are being properly carried out and that administrative services are
being provided to the Fund in a satisfactory manner.
 
   
    As full compensation for the services and facilities furnished to the Fund
and for expenses of the Fund assumed by the Investment Manager, the Fund pays
the Investment Manager monthly compensation calculated daily by applying the
annual rate of 0.80% of the Fund's net assets. For the fiscal year ended October
31, 1997, the Fund accrued total compensation to the Investment Manager
amounting to 0.80% of the Fund's average daily net assets and the total expenses
of Class B amounted to 2.36% of the average daily net assets of Class B. Shares
of Class A, Class C and Class D were first issued on July 28, 1997. The expenses
of the Fund include: the fee of the Investment Manager; the fee pursuant to the
Plan of Distribution (see "Purchase of Fund Shares"); taxes; transfer agent,
custodian and auditing fees; certain legal fees; and printing and other expenses
relating to the Fund's operations which are not expressly assumed by the
Investment Manager under its Investment Management Agreement with the Fund.
    
 
INVESTMENT OBJECTIVE AND POLICIES
- --------------------------------------------------------------------------------
 
    The investment objective of the Fund is long-term capital appreciation. The
Fund will attempt to achieve its investment objective by investing principally
in the securities of foreign and domestic companies engaged in the exploration,
mining, fabrication, processing, distribution or trading of precious metals and
minerals or in companies engaged in financing, managing, controlling or
operating companies engaged in these activities and also by investing a portion
of its assets in gold, silver, platinum and palladium bullion and coins. There
can be no assurance that the Fund's investment objective will be achieved. The
investment objective of the Fund is a fundamental policy and, as such, may not
be changed without the approval of the shareholders of the Fund. Because the
securities in which the Fund invests may involve risks not associated with more
traditional investments, an
 
                                       9
<PAGE>
investment in the Fund, by itself, should not be considered a balanced
investment program.
 
    Except during temporary defensive periods, the Fund will invest at least 65%
of its total assets in precious metals and minerals securities and precious
metals bullion and coins as well as other precious metals-related investments
(such as debt instruments indexed to or payable in precious metals warrants).
This concentration policy is a fundamental policy of the Fund.
 
    The precious metals and minerals securities in which the Fund will invest
include foreign and domestic common stocks, securities convertible into common
stocks, preferred stocks, debt securities, precious metals indexed debt
securities and options issued by companies engaged in the exploration, mining,
fabricating, processing, distributing or trading of precious metals and
minerals. A company will be considered to be principally engaged in such
activities if it derives more than 50% of its income or devotes 50% or more of
its assets to such activities.
 
    Up to 35% of the Fund's total assets may be invested in (a) common stocks of
companies that derive less than 50% of their income or devote 50% or less of
their assets to precious metals and minerals activities, (b) long-term U.S.
Government securities (securities guaranteed as to principal and interest by the
U.S. Government or its agencies or instrumentalities) (including zero coupon
bonds) and (c) short-term money market instruments such as obligations of, or
guaranteed by, the United States government, its agencies or instrumentalities
(including zero coupon bonds); commercial paper; banker's acceptances and
certificates of deposit of U.S. domestic banks, including foreign branches of
domestic banks, with assets of $500 million or more; time deposits; or debt
securities rated within the two highest grades by Moody's Investors Service
("Moody's") or Standard & Poor's Corporation ("S&P") or, if not rated, are of
comparable quality as determined by the Investment Manager and which mature
within one year from the date of purchase. Investments in short-term money
market instruments may equal more than 35% of the Fund's assets during temporary
defensive periods. Additionally, within the percentage limitation described
above, up to 20% of the Fund's total assets may be invested in long-term U.S.
Government securities in order to offset the possible decline in the value of
precious metals and precious metals securities during periods of low inflation
rates.
 
    Because most of the world's gold production is outside of the United States,
the Fund expects that a majority of its assets will be invested in the
securities of foreign issuers. The percentage of assets invested in particular
countries or regions, however, will change from time to time according to the
Investment Manager's judgement of their political stability and economic
outlook. Under normal market conditions, the Fund intends to invest at least 30%
of its assets in the securities of foreign issuers. Such securities may be in
the form of American Depository Receipts ("ADRs"), European Depository Receipts
("EDRs") or other similar securities convertible into securities of foreign
issuers. These securities may not necessarily be denominated in the same
currency as the securities into which they may be converted. ADRs are receipts
typically issued by a United States bank or trust company evidencing ownership
of the underlying securities. EDRs are European receipts evidencing a similar
arrangement with a European bank. Generally, ADRs in registered form, are
designed for use in the United States securities markets and EDRs, in bearer
form, are designed for use in the European securities markets. In the event that
ADRs or EDRs are not available for a particular security, the Fund nevertheless
may invest in that security. Such securities may or may not be listed on a
foreign securities exchange.
 
    The Fund will also invest a portion of its assets in gold, silver, platinum
and palladium bullion and coins (or certificates, receipts or contracts
representing ownership interests in these precious metals). While it is intended
that no more than 25% of
 
                                       10
<PAGE>
the Fund's total assets will be invested in such bullion or coins, the Fund's
investment in bullion or coins may be further restricted in order to comply with
regulations of states where the Fund's shares are qualified for sale.
 
    Bullion and coins will only be bought from and sold to U.S. and foreign
banks, regulated U.S. commodities exchanges, exchanges affiliated with a
regulated U.S. stock exchange, and dealers who are members of, or affiliated
with members of, a regulated U.S. commodities exchange, in accordance with
applicable investment laws. Gold, silver, platinum and palladium bullion will
not be purchased in any form that is not readily marketable. Coins will not be
purchased for their numismatic value and will not be considered for purchase if
they cannot be bought or sold in an active market. Any bullion or coins
purchased by the Fund will be delivered to and stored with a qualified custodian
bank in the U.S. Investors should note that bullion and coins do not generate
income, offering only the potential for capital appreciation or depreciation,
and in these transactions the Fund may encounter higher custody and transaction
costs than those normally associated with the ownership of securities, as well
as shipping and insurance costs. The Fund may attempt to minimize the costs
associated with actual custody of bullion or coins by the use of receipts or
certificates representing ownership interests in these precious metals. The
Fund's Investment Manager believes that investments in precious metals
themselves could serve to moderate fluctuations in the value of the Fund's
portfolio since at times the prices of precious metals have tended not to
fluctuate as widely as the securities of issuers engaged in the mining of such
metals.
 
RISK CONSIDERATIONS
 
    Investments related to gold and other precious metals and minerals are
considered speculative and are impacted by a host of world-wide economic,
financial and political factors. Prices of gold and other precious metals may
fluctuate sharply over short periods of time due to changes in inflation or
expectations regarding inflation in various countries, the availability of
supplies of these precious metals, changes in industrial and commercial demand,
metal sales by governments, central banks or international agencies, investment
speculation, monetary and other economic policies of various governments and
governmental restrictions on the private ownership of certain precious metals
and minerals. Additionally, the precious metals and minerals securities in which
the Fund may invest may not necessarily move in tandem with the prices of actual
precious metals and minerals.
 
    At the present time, there are five major producers of gold bullion. In
order of magnitude they are: the Republic of South Africa, the successor states
of the former Soviet Union, Canada, the United States and Australia. Political
and economic conditions in these countries may have a direct effect on the
mining, distribution and price of gold and sales of central bank gold holdings.
 
    FOREIGN SECURITIES.  The Fund expects that a significant portion of its
assets will be invested in securities of foreign issuers because companies
engaged in activities relating to precious metals and minerals are frequently
located outside the United States. Investments in the securities of foreign
issuers involve special risks. These risks include: less public information
available about foreign companies than is available about U.S. companies; less
government regulation of stock exchanges, brokers, listed companies and banks in
foreign countries than in the United States; foreign stock markets have less
volume than the United States markets and the securities of some foreign
companies are less liquid and more volatile than the securities of comparable
United States companies; foreign companies, generally, are not subject to the
uniform accounting, auditing and financial reporting standards and practices
applicable to United States companies; the possibility of expropriation of
assets, or confiscatory taxation of investments or nationalization of bank
deposits by foreign governments; the possible establishment of exchange controls
and currency blockages by foreign governments; adverse political and economic
developments and the difficulties of obtaining and enforcing
 
                                       11
<PAGE>
a judgement against the issuers of foreign securities; and fluctuations in
foreign currency exchange rates which may affect the value of the Fund's
portfolio securities (and consequently the net asset value of the Fund's
shares), the value of dividends and interest earned and gains and losses
realized on the sale of securities, and the value of net investment income and
unrealized appreciation or depreciation of investments. In addition, differences
in clearance and settlement procedures on foreign markets may occasion delays in
settlements of the Fund's trades effected in such markets. As such, the
inability to dispose of portfolio securities due to settlement delays could
result in losses to the Fund due to subsequent declines in value of such
securities and the inability of the Fund to make intended security purchases due
to settlement problems could result in a failure of the Fund to make potentially
advantageous investments.
 
FOREIGN CURRENCY EXCHANGE TRANSACTIONS
 
    As a way of managing exchange rate risks, the Fund may enter into foreign
currency exchange transactions either on a cash basis at the rate prevailing in
the currency exchange market, or by entering into forward foreign currency
exchange contracts to buy or sell currencies.
 
    A forward foreign currency exchange contract ("forward contract") involves
an obligation to purchase or sell a specific currency at a future date, which
may be any fixed number of days from the date of the contract agreed upon by the
parties, at a price set at the time of the contract. These contracts may be
bought or sold to protect the Fund's portfolio, to some degree, against a
possible loss resulting from an adverse change in the relationship between
foreign currencies and the U.S. dollar. Forward contracts can be used to protect
the value of the Fund's investment securities by establishing a rate of exchange
that the Fund can achieve at some future point in time; they do not eliminate
fluctuations in the underlying prices of the securities. Additionally, although
forward contracts tend to minimize the risk of loss due to a decline in the
value of the hedged currency, at the same time, they tend to limit any potential
gains that might result should the value of such currency increase. The Fund
does not intend to commit more than 20% of the value of its total assets to
forward contracts for position hedging at any one time. Additionally, the Fund,
generally, will not enter into a forward contract with a term greater than one
year.
 
OPTIONS AND FUTURES TRANSACTIONS
 
    The Fund is permitted to enter into call and put options on equity
securities listed on various U.S. securities exchanges ("Listed Options") and
written in over-the-counter transactions ("OTC options").
 
    Listed options are issued by the Options Clearing Corporation ("OCC").
 
    OTC options are purchased from or sold (written) to dealers or financial
institutions which have entered into direct agreements with the Fund. The Fund
is permitted to write covered call options on portfolio securities, without
limit, in order to aid it in achieving its investment objective.
 
    The Fund may purchase listed or OTC put or call options on its portfolio
securities in amounts exceeding no more than 10% of its total assets.
 
    The Fund may purchase call options only to close out a covered call position
or to protect against an increase in the price of a security it anticipates
purchasing. The Fund may purchase put options on securities which it holds in
its portfolio only to protect itself against a decline in the value of the
security. The Fund may also purchase put options to close out written put
positions. There are no other limits on the Fund's ability to purchase call and
put options.
 
    The Fund may enter into futures contracts on precious metals as a hedge
("precious metals futures") against changes in the price of precious metals held
or intended to be acquired by the Fund, but not for speculation or for achieving
leverage. The Fund's hedging activities may include purchases of futures
contracts as an offset against the effect of anticipated increases in the price
of a precious metal which the Fund intends to acquire
 
                                       12
<PAGE>
("anticipatory hedge") or sales of futures contracts as an offset against the
effect of anticipated declines in the price of a precious metal which the Fund
owns ("hedge against an existing position").
 
    The Fund may enter into precious metals forward contracts which are similar
to precious metals futures contracts, in that they provide for the purchase or
sale of precious metals at an agreed price with delivery to take place at an
agreed future time. However, unlike futures contracts, forward contracts are
negotiated contracts which are primarily used in the dealer market. Unlike the
futures contract market, which is regu-
lated by the Commodity Futures Trading Commission ("CFTC") and by the
regulations of the commodity exchanges, the forward contract market is
unregulated. The Fund will use forward contracts for the same hedging purposes
as those applicable to futures contracts, as described above.
 
    The Fund may also purchase and write call and put options on futures
contracts which are traded on an Exchange and enter into closing transactions
with respect to such options to terminate an existing position.
 
    The Fund will purchase and write options on futures contracts for identical
purposes to those set forth above for the purchase of a futures contract and the
sale of a futures contract or to close out a long or short position in futures
contracts.
 
    The Fund may also purchase put or call options on precious metals futures
contracts. Such options would be purchased solely for hedging purposes similar
to those applicable to the purchase and sale of futures contracts. The Fund may
not purchase options on precious metals and precious metals futures contracts if
the premiums paid for all such options, together with margin deposits on
precious metals futures contracts, would exceed 5% of the Fund's total assets at
the time the option is purchased. The Fund may also write covered call options
on precious metal futures contracts.
 
    The Fund may not enter into futures contracts or related options thereon if,
immediately thereafter, the amount committed to margin plus the amount paid for
premiums for unexpired options on futures contracts exceeds 5% of the value of
the Fund's total assets after taking into account unrealized gains and
unrealized losses on such contracts it has entered into, provided, however, that
in the case of an option that is in-the-money (the exercise price of the call
(put) option is less (more) than the market price of the underlying security) at
the time of purchase, the in-the-money amount may be excluded in calculating the
5%. However, there is no overall limitation on the percentage of the Fund's
assets which may be subject to a hedge position.
 
    RISKS OF OPTIONS AND FUTURES TRANSACTIONS. The Fund may close out its
position as writer of an option, or as a buyer or seller of a futures contract,
only if a liquid secondary market exists for options or futures contracts of
that series. There is no assurance that such a market will exist, particularly
in the case of OTC options, as such options will generally only be closed out by
entering into a closing purchase transaction with the purchasing dealer. Also,
exchanges may limit the amount by which the price of many futures contracts may
move on any day. If 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.
 
    While the futures contracts and options transactions to be engaged in by the
Fund for the purpose of hedging the Fund's assets are not speculative in nature,
there are risks inherent in the use of such instruments. One such risk is that
the Investment Manager could be incorrect in its expectations as to the
direction or extent of various price movements or the time span within which the
movements take place.
 
    Another risk which may arise in employing futures contracts to protect
against the price volatility of the Fund's assets is that the prices of precious
metals subject to futures contracts (and thereby the futures contract prices)
may correlate imperfectly with the prices of such assets. A correlation may also
be distorted by the fact that the futures market is dominated by short-term
traders seeking to profit from the
 
                                       13
<PAGE>
difference between a contract or security price objective and their cost of
borrowed funds. Such distortions are generally minor and would diminish as the
contract approached maturity.
 
    Precious metals futures and forward prices can be volatile and are
influenced principally by changes in spot market prices, which in turn are
affected by a variety of political and economic factors. In addition,
expectations of changing market conditions may at times influence the prices of
futures and forward contracts, and changes in the cost of holding physical
precious metals, including storage, insurance and interest expense, will also
affect the relationship between spot and futures or forward prices. While the
correlation between changes in prices of futures and forward contracts and
prices of the precious metals being hedged by such contracts has historically
been very strong, the correlation may at times be imperfect and even a well
conceived hedge may be unsuccessful to some degree because of market behavior or
unexpected precious metals price trends. To the extent that interest rates move
in a direction opposite to that anticipated, the Fund may realize a loss on a
futures transaction not offset by an increase in the value of portfolio
securities. Moreover there is a possibility of a lack of a liquid secondary
market for closing out a futures position or futures option. The success of any
hedging technique depends upon the Investment Manager's accuracy in predicting
the direction of a market. If these predictions are incorrect, the Fund may
realize a loss.
 
    Compared to the purchase or sale of futures contracts, the purchase of call
or put options on futures contracts involves less potential risk to the Fund
because the maximum amount at risk is the premium paid for the options (plus
transaction costs). However, there may be circumstances when a purchase of a
call or put option on a futures contract would result in a loss to the Fund when
the purchase or sale of a futures contract would not result in a loss, such as
when there is no movement in the prices of the underlying securities. The
writing of a put or call option on a futures contract involves risks similar to
those relating to transactions in futures contracts as are described above.
 
OTHER INVESTMENT POLICIES
 
    REPURCHASE AGREEMENTS.  The Fund may enter into repurchase agreements, which
may be viewed as a type of secured lending by the Fund, and which typically
involve the acquisition by the Fund of debt securities from a selling financial
institution such as a bank, savings and loan association or broker-dealer. The
agreement provides that the Fund will sell back to the institution, and that the
institution will repurchase, the underlying security at a specified price and at
a fixed time in the future, usually not more than seven days from the date of
purchase. While repurchase agreements involve certain risks not associated with
direct investments in debt securities, the Fund follows procedures designed to
minimize 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, 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.
 
    WHEN-ISSUED AND DELAYED DELIVERY SECURITIES AND FORWARD COMMITMENTS.  From
time to time, in the ordinary course of business, the Fund may purchase
securities on a when-issued or delayed delivery basis or may purchase or sell
securities on a forward commitment basis. When such transactions are negotiated,
the price is fixed at the time of the commitment, but delivery and payment can
take place a month or more after the date of the commitment. There is no overall
limit on the percentage of the Fund's assets which may be committed to the
purchase of securities on a when-issued, delayed delivery or forward commitment
basis. An increase in the percentage of the Fund's assets committed to the
purchase of securities
 
                                       14
<PAGE>
on a when-issued, delayed delivery or forward commitment basis may increase the
volatility of the Fund's net asset value.
 
    WHEN, AS AND IF ISSUED SECURITIES.  The Fund may purchase securities on a
"when, as and if issued" basis under which the issuance of the security depends
upon the occurrence of a subsequent event, such as approval of a merger,
corporate reorganization, leveraged buyout or debt restructuring. If the
anticipated event does not occur and the securities are not issued, the Fund
will have lost an investment opportunity. There is no overall limit on the
percentage of the Fund's assets which may be committed to the purchase of
securities on a "when, as and if issued" basis. An increase in the percentage of
the Fund's assets committed to the purchase of securities on a "when, as and if
issued" basis may increase the volatility of its net asset value.
 
    PRIVATE PLACEMENTS.  The Fund may invest up to 5% of its total assets in
securities which are subject to restrictions on resale because they have not
been registered under the Securities Act of 1933, as amended (the "Securities
Act"), or which are otherwise not readily marketable. (Securities eligible for
resale pursuant to Rule 144A of the Securities Act, and determined to be liquid
pursuant to the procedures discussed in the following paragraph, are not subject
to the foregoing restriction.) These securities are generally referred to as
private placements or restricted securities. Limitations on the resale of such
securities may have an adverse effect on their marketability, and may prevent
the Fund from disposing of them promptly at reasonable prices. The Fund may have
to bear the expense of registering such securities for resale and the risk of
substantial delays in effecting such registration. The Securities and Exchange
Commission has adopted Rule 144A under the Securities Act, which permits the
Fund to sell restricted securities to qualified institutional buyers without
limitation. The Investment Manager, pursuant to procedures adopted by the
Trustees of the Fund, will make a determination as to the liquidity of each
restricted security purchased by the Fund. If a restricted security is
determined to be "liquid," such security will not be included within the
category "illiquid securities," which is limited by the Fund's investment
restrictions to 10% of the Fund's total assets. However, investing in Rule 144A
securities could have the effect of increasing the level of Fund illiquidity to
the extent the Fund, at a particular point in time, may be unable to find
qualified institutional buyers interested in purchasing such securities.
 
    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 cash
equivalents, which are maintained in a segregated account pursuant to applicable
regulations and that are at least equal to 100% of the market value determined
daily of the loaned securities. The Fund may lend up to 10% of the value of its
total assets.
 
    ZERO COUPON SECURITIES.  A portion of the fixed-income securities purchased
by the Fund may be zero coupon securities. Such securities are purchased at a
discount from their face amount, giving the purchaser the right to receive their
full value at maturity. The interest earned on such securities is, implicitly,
automatically compounded and paid out at maturity. While such compounding at a
constant rate eliminates the risk of receiving lower yields upon reinvestment of
interest if prevailing interest rates decline, the owner of a zero coupon
security will be unable to participate in higher yields upon reinvestment of
interest received on interest-paying securities if prevailing interest rates
rise.
 
    A zero coupon security pays no interest to its holder during its life.
Therefore, to the extent the Fund invests in zero coupon securities, it will not
receive current cash available for distribution to shareholders. In addition,
zero coupon securities are subject to substantially greater price fluctuations
during periods of changing prevailing interest rates than are comparable
securities which pay interest on a current basis. Current federal tax law
 
                                       15
<PAGE>
requires that a holder (such as the Fund) of a zero coupon security accrue a
portion of the discount at which the security was purchased as income each year
even though the Fund receives no interest payments in cash on the security
during the year.
 
PORTFOLIO MANAGEMENT
 
   
    The Fund's portfolio is actively managed by its Investment Manager with a
view to achieving the Fund's investment objective. In determining which
securities to purchase for the Fund or hold in the Fund's portfolio, the
Investment Manager will rely on information from various sources, including
research, analysis and appraisals of brokers and dealers, including Dean Witter
Reynolds Inc. ("DWR"), Morgan Stanley and Co. Incorporated and other
broker-dealer affiliates of InterCapital, the views of others regarding economic
developments and interest rate trends; and the Investment Manager's own analysis
of factors it deems relevant.
    
 
   
    The Fund's portfolio is managed within InterCapital's Growth Group which
manages 33 equity funds and fund portfolios with approximately $14.2 billion in
assets as of November 30, 1997. Robert Rossetti, Vice President of InterCapital,
and a member of InterCapital's Growth Group, has been the primary portfolio
manager of the Fund since December, 1996. Prior to joining InterCapital in May,
1995, Mr. Rossetti was a Vice President at Merrill Lynch & Co. Inc. (November,
1994-April, 1995) and prior thereto was a Vice President at Prudential
Securities for six years.
    
 
    In selecting particular investments for the Fund's portfolio, the Investment
Manager will consider a wide variety of factors including current and
anticipated prices for precious metals and minerals, the extent and quality of
the issuer's metals reserves (including ore grades of metals mined by the
issuer), the quality of the issuer's management, the financial condition of the
issuer, present and anticipated levels of taxation on the operating income of
the issuer, labor relations, the issuer's mining,processing and fabricating
costs and techniques, and the marketability of the issuer's securities and the
price at which the issuer's precious metals and minerals are sold in the free
market.
 
   
    Orders for transactions in other portfolio securities and commodities are
placed for the Fund with a number of brokers and dealers, including DWR.
Pursuant to an order of the Securities and Exchange Commission, the Fund may
effect principal transactions in certain money market instruments with DWR,
Morgan Stanley and Co. Incorporated and other brokers and dealers that are
affiliates of the Investment Manager. In addition, the Fund may incur brokerage
commissions on transactions conducted through such affiliates. The Fund's normal
expectation in purchasing a security is that its anticipated performance level
will be reached over the longer, rather than the shorter, term. Historically,
stock prices of companies in the precious metals industry have been volatile.
The rate of portfolio turnover will not be a limiting factor when portfolio
changes are deemed appropriate. It is not anticipated that the portfolio trading
will result in the Fund's portfolio turnover rate exceeding 100%. A more
extensive discussion of the Fund's portfolio brokerage policies is set forth in
the Statement of Additional Information.
    
 
INVESTMENT RESTRICTIONS
- --------------------------------------------------------------------------------
 
    The investment restrictions listed below are among the restrictions which
have been adopted by the Fund as fundamental policies. Under the Investment
Company Act of 1940, as amended (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.
 
                                       16
<PAGE>
    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).
 
   2. Purchase more than 10% of all outstanding voting securities of any one
issuer.
 
   3. Invest more than 10% of its total assets in illiquid securities (OTC
options and securities which are not readily marketable or which are subject to
legal or contractual restrictions on resale) and repurchase agreements which
have a maturity of longer than seven days.
 
   4. Invest more than 5% of the value of its total assets in securities of
issuers having a record, together with predecessors, of less than three years of
continuous operation. This restriction shall not apply to any obligation issued
or guaranteed by the United States Government, its agencies or
instrumentalities.
 
   5. 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).
 
    Notwithstanding any other investment policy or restriction, the Fund may
seek to achieve its investment objective by investing all or substantially all
of its assets in another investment company having substantially the same
investment objective and policies as the Fund.
 
PURCHASE OF FUND SHARES
- --------------------------------------------------------------------------------
 
GENERAL
 
    The Fund offers each class of its shares for sale to the public on a
continuous basis. Pursuant to a Distribution Agreement between the Fund and Dean
Witter Distributors Inc. (the "Distributor"), an affiliate of the Investment
Manager, shares of the Fund are distributed by the Distributor and offered by
DWR and other dealers who have entered into selected dealer agreements with the
Distributor ("Selected Broker-Dealers"). The principal executive office of the
Distributor is located at Two World Trade Center, New York, New York 10048.
 
   
    The Fund offers four classes of shares (each, a "Class"). Class A shares are
sold to investors with an initial sales charge that declines to zero for larger
purchases; however, Class A shares sold without an initial sales charge are
subject to a contingent deferred sales charge ("CDSC") of 1.0% if redeemed
within one year of purchase, except for certain specific circumstances. Class B
shares are sold without an initial sales charge but are subject to a CDSC
(scaled down from 5.0% to 1.0%) payable upon most redemptions within six years
after purchase. (Class B shares purchased by certain qualified
employer-sponsored benefit plans are subject to a CDSC scaled down from 2.0% to
1.0% if redeemed within three years after purchase.) Class C shares are sold
without an initial sales charge but are subject to a CDSC of 1.0% on most
redemptions made within one year after purchase. Class D shares are sold without
an initial sales charge or CDSC and are available only to investors meeting an
initial investment minimum of $5 million ($25 million for certain qualified
plans) and to certain other limited categories of investors. At the discretion
of the Board of Trustees of the Fund, Class A shares may be sold to categories
of investors in addition to those set forth in this prospectus at net asset
value without a front-end sales charge, and Class D shares may be sold to
certain other categories of investors, in each case as may be described in the
then current prospectus of the Fund. See "Alternative Purchase Arrangements --
Selecting a Particular Class" for a discussion of factors to consider in
selecting which Class of shares to purchase.
    
 
   
    The minimum initial purchase is $1,000 for each Class of shares, although
Class D shares are only available to persons investing $5 million ($25 million
for certain qualified plans) or more and to certain
    
 
                                       17
<PAGE>
   
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 Precious Metals and Minerals Trust,
directly to Dean Witter Trust FSB (the "Transfer Agent" or "DWT") at P.O. Box
1040, Jersey City, NJ 07303 or by contacting an account executive of DWR or
other Selected Broker-Dealer. When purchasing shares of the Fund, investors must
specify whether the purchase is for Class A, Class B, Class C or Class D shares.
If no Class is specified, the Transfer Agent will not process the transaction
until the proper Class is identified. The minimum initial purchase in the case
of investments through EasyInvest-SM-, an automatic purchase plan (see
"Shareholder Services"), is $100, provided that the schedule of automatic
investments will result in investments totalling $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 or administrative 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 requested 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 or any of its affiliates and/or
the Selected Broker-Dealer. In addition, some sales personnel of the Selected
Broker-Dealer will receive various types of non-cash compensation as special
sales incentives, including trips, educational and/or business seminars and
merchandise. The Fund and the Distributor reserve the right to reject any
purchase orders.
 
ALTERNATIVE PURCHASE ARRANGEMENTS
 
    The Fund offers several Classes of shares to investors designed to provide
them with the flexibility of selecting an investment best suited to their needs.
The general public is offered three Classes of shares: Class A shares, Class B
shares and Class C shares, which differ principally in terms of sales charges
and rate of expenses to which they are subject. A fourth Class of shares, Class
D shares, is offered only to limited categories of investors (see "No Load
Alternative -- Class D Shares" below).
 
    Each Class A, Class B, Class C or Class D share of the Fund represents an
identical interest in the investment portfolio of the Fund except that Class A,
Class B and Class C shares bear the expenses of the ongoing shareholder service
fees, Class B and Class C shares
 
                                       18
<PAGE>
bear the expenses of the ongoing distribution fees and Class A, Class B and
Class C shares which are redeemed subject to a CDSC bear the expense of the
additional incremental distribution costs resulting from the CDSC applicable to
shares of those Classes. The ongoing distribution fees that are imposed on Class
A, Class B and Class C shares will be imposed directly against those Classes and
not against all assets of the Fund and, accordingly, such charges against one
Class will not affect the net asset value of any other Class or have any impact
on investors choosing another sales charge option. See "Plan of Distribution"
and "Redemptions and Repurchases."
 
    Set forth below is a summary of the differences between the Classes and the
factors an investor should consider when selecting a particular Class. This
summary is qualified in its entirety by detailed discussion of each Class that
follows this summary.
 
    CLASS A SHARES.  Class A shares are sold at net asset value plus an initial
sales charge of up to 5.25%. The initial sales charge is reduced for certain
purchases. Investments of $1 million or more (and investments by certain other
limited categories of investors) are not subject to any sales charges at the
time of purchase but are subject to a CDSC of 1.0% on redemptions made within
one year after purchase, except for certain specific circumstances. Class A
shares are also subject to a 12b-1 fee of up to 0.25% of the average daily net
assets of the Class. See "Initial Sales Charge Alternative -- Class A Shares."
 
   
    CLASS B SHARES.  Class B shares are offered at net asset value with no
initial sales charge but are subject to a CDSC (scaled down from 5.0% to 1.0%)
if redeemed within six years of purchase. (Class B shares purchased by certain
qualified plans are subject to a CDSC scaled down from 2.0% to 1.0% if redeemed
within three years after purchase.) This CDSC may be waived for certain
redemptions. Class B shares are also subject to an annual 12b-1 fee of 1.0% of
the lesser of: (a) the average daily aggregate gross sales of the Fund's Class B
shares since the inception of the Fund (not including reinvestments of dividends
or capital gains distributions), less the average daily aggregate net asset
value of the Fund's Class B shares redeemed since the Fund's inception upon
which a CDSC has been imposed or waived, or (b) the average daily net assets of
Class B. The Class B shares' distribution fee will cause that Class to have
higher expenses and pay lower dividends than Class A or Class D shares.
    
 
    After approximately ten (10) years, Class B shares will convert
automatically to Class A shares of the Fund, based on the relative net asset
values of the shares of the two Classes on the conversion date. In addition, a
certain portion of Class B shares that have been acquired through the
reinvestment of dividends and distributions will be converted at that time. See
"Contingent Deferred Sales Charge Alternative -- Class B Shares."
 
    CLASS C SHARES.  Class C shares are sold at net asset value with no initial
sales charge but are subject to a CDSC of 1.0% on redemptions made within one
year after purchase. This CDSC may be waived for certain redemptions. They are
subject to an annual 12b-1 fee of up to 1.0% of the average daily net assets of
the Class C shares. The Class C shares' distribution fee may cause that Class to
have higher expenses and pay lower dividends than Class A or Class D shares. See
"Level Load Alternative -- Class C Shares."
 
    CLASS D SHARES.  Class D shares are available only to limited categories of
investors (see "No Load Alternative -- Class D Shares" below). Class D shares
are sold at net asset value with no initial sales charge or CDSC. They are not
subject to any 12b-1 fees. See "No Load Alternative -- Class D Shares."
 
    SELECTING A PARTICULAR CLASS.  In deciding which Class of Fund shares to
purchase, investors should consider the following factors, as well as any other
relevant facts and circumstances:
 
    The decision as to which Class of shares is more beneficial to an investor
depends on the amount and intended length of his or her investment. Investors
who prefer an initial sales charge alternative may elect to purchase Class A
shares. Investors qualifying for significantly reduced or, in the case of
purchases of $1 million or more, no initial sales charges may find
 
                                       19
<PAGE>
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
<C>        <S>                 <C>         <C>
    A      Maximum 5.25%         0.25%            No
           initial sales
           charge reduced for
           purchases of
           $25,000 and over;
           shares sold
           without an initial
           sales charge
           generally subject
           to a 1.0% CDSC
           during first year.
    B      Maximum 5.0% CDSC      1.0%     B shares convert
           during the first                to A shares
           year decreasing to              automatically
           0 after six years               after
                                           approximately
                                           ten years
    C      1.0% CDSC during       1.0%            No
           first year
    D             None            None            No
</TABLE>
 
    See "Purchase of Fund Shares" and "The Fund and its Management" for a
complete description of the sales charges and service and distribution fees for
each Class of shares and "Determination of Net Asset Value," "Dividends,
Distributions and Taxes" and "Shareholder Services -- Exchange Privilege" for
other differences between the Classes of shares.
 
INITIAL SALES CHARGE ALTERNATIVE --
CLASS A SHARES
 
    Class A shares are sold at net asset value plus an initial sales charge. In
some cases, reduced sales charges may be available, as described below.
Investments of $1 million or more (and investments by certain other limited
categories of investors) are not subject to any sales charges at the time of
purchase but are subject to a CDSC of 1.0% on redemptions made within one year
after purchase (calculated from the last day of the month in which the shares
were purchased), except for certain specific circumstances. The CDSC will be
 
                                       20
<PAGE>
assessed on an amount equal to the lesser of the current market value or the
cost of the shares being redeemed. The CDSC will not be imposed (i) in the
circumstances set forth below in the section "Contingent Deferred Sales Charge
Alternative -- Class B Shares -- CDSC Waivers," except that the references to
six years in the first paragraph of that section shall mean one year in the case
of Class A shares, and (ii) in the circumstances identified in the section
"Additional Net Asset Value Purchase Options" below. Class A shares are also
subject to an annual 12b-1 fee of up to 0.25% of the average daily net assets of
the Class.
 
    The offering price of Class A shares will be the net asset value per share
next determined following receipt of an order (see "Determination of Net Asset
Value" below), plus a sales charge (expressed as a percentage of the offering
price) on a single transaction as shown in the following table:
 
<TABLE>
<CAPTION>
                                          SALES CHARGE
                           ------------------------------------------
                              PERCENTAGE OF          APPROXIMATE
        AMOUNT OF            PUBLIC OFFERING    PERCENTAGE OF AMOUNT
   SINGLE TRANSACTION             PRICE               INVESTED
- -------------------------  -------------------  ---------------------
<S>                        <C>                  <C>
Less than $25,000........           5.25%                 5.54%
$25,000 but less
     than $50,000........           4.75%                 4.99%
$50,000 but less
     than $100,000.......           4.00%                 4.17%
$100,000 but less
     than $250,000.......           3.00%                 3.09%
$250,000 but less
     than $1 million.....           2.00%                 2.04%
$1 million and over......              0                     0
</TABLE>
 
    Upon notice to all Selected Broker-Dealers, the Distributor may reallow up
to the full applicable sales charge as shown in the above schedule during
periods specified in such notice. During periods when 90% or more of the sales
charge is reallowed, such Selected Broker-Dealers may be deemed to be
underwriters as that term is defined in the Securities Act of 1933.
 
    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
 
                                       21
<PAGE>
   
case shares acquired through reinvestment of dividends and distributions), which
are held at the time of such transaction, amounts to $25,000 or more. If such
investor has a cumulative net asset value of shares of FSC Funds and Class A and
Class D shares that, together with the current investment amount, is equal to at
least $5 million ($25 million for certain qualified plans), such investor is
eligible to purchase Class D shares subject to the $1,000 minimum initial
investment requirement of that Class of the Fund. See "No Load Alternative --
Class D Shares" below.
    
 
    The Distributor must be notified by DWR or a Selected Broker-Dealer or the
shareholder at the time a purchase order is placed that the purchase qualifies
for the reduced charge under the Right of Accumulation. Similar notification
must be made in writing by the dealer or shareholder when such an order is
placed by mail. The reduced sales charge will not be granted if: (a) such
notification is not furnished at the time of the order; or (b) a review of the
records of the Selected Broker-Dealer or the Transfer Agent fails to confirm the
investor's represented holdings.
 
    LETTER OF INTENT.  The foregoing schedule of reduced sales charges will also
be available to investors who enter into a written Letter of Intent providing
for the purchase, within a thirteen-month period, of Class A shares of the Fund
from DWR or other Selected Broker-Dealers. The cost of Class A shares of the
Fund or shares of other Dean Witter Funds which were previously purchased at a
price including a front-end sales charge during the 90-day period prior to the
date of receipt by the Distributor of the Letter of Intent, or of Class A shares
of the Fund or shares of other Dean Witter Funds acquired in exchange for shares
of such funds purchased during such period at a price including a front-end
sales charge, which are still owned by the shareholder, may also be included in
determining the applicable reduction.
 
    ADDITIONAL NET ASSET VALUE PURCHASE OPTIONS. In addition to investments of
$1 million or more, Class A shares also may be purchased at net asset value by
the following:
 
   
    (1) trusts for which DWT (an affiliate of the Investment Manager) provides
discretionary trustee services;
    
 
   
    (2) persons participating in a fee-based program approved by the
Distributor, pursuant to which such persons pay an asset based fee for services
in the nature of investment advisory or administrative services (such
investments are subject to all of the terms and conditions of such programs,
which may include termination fees, mandatory redemption upon termination and
such other circumstances as specified in the programs' agreements, and
restrictions on transferability of Fund shares);
    
 
   
    (3) 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 DWT 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 DWT 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.
 
                                       22
<PAGE>
    No CDSC will be imposed on redemptions of shares purchased pursuant to
paragraphs (1), (2) or (5), above.
 
    For further information concerning purchases of the Fund's shares, contact
DWR or another Selected Broker-Dealer or consult the Statement of Additional
Information.
 
CONTINGENT DEFERRED SALES CHARGE
ALTERNATIVE -- CLASS B SHARES
 
    Class B shares are sold at net asset value next determined without an
initial sales charge so that the full amount of an investor's purchase payment
may be immediately invested in the Fund. A CDSC, however, will be imposed on
most Class B shares redeemed within six years after purchase. The CDSC will be
imposed on any redemption of shares if after such redemption the aggregate
current value of a Class B account with the Fund falls below the aggregate
amount of the investor's purchase payments for Class B shares made during the
six years (or, in the case of shares held by certain employer-sponsored benefit
plans, three years) preceding the redemption. In addition, Class B shares are
subject to an annual 12b-1 fee of 1.0% of the lesser of: (a) the average daily
aggregate gross sales of the Fund's Class B shares since the inception of the
Fund (not including reinvestments of dividends or capital gains distributions),
less the average daily aggregate net asset value of the Fund's Class B shares
redeemed since the Fund's inception upon which a CDSC has been imposed or
waived, or (b) the average daily net assets of Class B.
 
    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 on or after July 28,
1997 by Qualified Retirement Plans for which DWT 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 employer-sponsored benefit plans, three
years) preceding the redemption; (ii) the current net asset value of shares
purchased more than six years (or, in the case of shares held by certain
employer-sponsored benefit plans, three years) prior to the redemption; and
(iii) the current net asset value of shares purchased through reinvestment of
dividends or distributions
 
                                       23
<PAGE>
and/or shares acquired in exchange for shares of FSC Funds, or of other Dean
Witter Funds acquired in exchange for such shares. Moreover, in determining
whether a CDSC is applicable it will be assumed that amounts described in (i),
(ii) and (iii) above (in that order) are redeemed first.
 
    In addition, the CDSC, if otherwise applicable, will be waived in the case
of:
 
    (1) redemptions of shares held at the time a shareholder dies or becomes
disabled, only if the shares are:  (a) registered either in the name of an
individual shareholder (not a trust), or in the names of such shareholder and
his or her spouse as joint tenants with right of survivorship; or  (b) held in a
qualified corporate or self-employed retirement plan, Individual Retirement
Account ("IRA") or Custodial Account under Section 403(b)(7) of the Internal
Revenue Code ("403(b) Custodial Account"), provided in either case that the
redemption is requested within one year of the death or initial determination of
disability;
 
    (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 DWT serves as Trustee or
DWR's Retirement Plan Services serves as recordkeeper pursuant to a written
Recordkeeping Services Agreement ("Eligible Plan"), provided that either:  (a)
the plan continues to be an Eligible Plan after the redemption; or  (b) the
redemption is in connection with the complete termination of the plan involving
the distribution of all plan assets to participants.
    
 
    With reference to (1) above, for the purpose of determining disability, the
Distributor utilizes the definition of disability contained in Section 72(m)(7)
of the Internal Revenue Code, which relates to the inability to engage in
gainful employment. With reference to (2) above, the term "distribution" does
not encompass a direct transfer of IRA, 403(b) Custodial Account or retirement
plan assets to a successor custodian or trustee. All waivers will be granted
only following receipt by the Distributor of confirmation of the shareholder's
entitlement.
 
   
    CONVERSION TO CLASS A SHARES.  All shares of the Fund held prior to July 28,
1997 have been designated Class B shares. Shares held before May 1, 1997 will
convert to Class A shares in May, 2007. In all other instances Class B shares
will convert automatically to Class A shares, based on the relative net asset
values of the shares of the two Classes on the conversion date, which will be
approximately ten (10) years after the date of the original purchase. The ten
year period is calculated from the last day of the month in which the shares
were purchased or, in the case of Class B shares acquired through an exchange or
a series of exchanges, from the last day of the month in which the original
Class B shares were purchased, provided that shares originally purchased before
May 1, 1997 will convert to Class A shares in May, 2007. The conversion of
shares purchased on or after May 1, 1997 will take place in the month following
the tenth anniversary of the purchase. There will also be converted at that time
such proportion of Class B shares acquired through automatic reinvestment of
dividends and distributions owned by the shareholder as the total number of his
or her Class B shares converting at the time bears to the total number of
outstanding Class B shares purchased and owned by the shareholder. In the case
of Class B shares held by a Qualified Retirement Plan for which DWT serves as
Trustee or DWR's Retirement Plan Services serves as recordkeeper pursuant to a
written Recordkeeping Services
    
 
                                       24
<PAGE>
   
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 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 DWT 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 or
administrative services (subject to all of the terms and conditions of such
programs referred to in (i) and (ii) above, which may include termination fees,
mandatory redemption upon termination and such other circumstances as specified
in the programs' agreements, and restrictions on transferability of Fund
shares); (iii) 401(k) plans established by DWR and SPS Transaction Services,
Inc. (an affiliate of DWR) for their employees; (iv) certain Unit Investment
Trusts sponsored by DWR;
    
 
                                       25
<PAGE>
   
(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 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 lesser of: (a) the average daily
aggregate gross sales of the Fund's Class B shares since the inception of the
Fund (not including reinvestments of dividends or capital gains distributions),
less the average daily aggregate net asset value of the Fund's Class B shares
redeemed since the Fund's inception upon which a CDSC has been imposed or
waived, or (b) the average daily net assets of Class B. The fee is treated by
the Fund as an expense in the year it is accrued. In the case of Class A shares,
the entire amount of the fee currently represents a service fee within the
meaning of the NASD guidelines. In the case of Class B and Class C shares, a
portion of the fee payable pursuant to the Plan, equal to 0.25% of the average
daily net assets of each of these Classes, is currently characterized as a
service fee. A service fee is a payment made for personal service and/or the
maintenance of shareholder accounts.
 
    Additional amounts paid under the Plan in the case of Class B and Class C
shares are paid to the Distributor for services provided and the expenses borne
by the Distributor and others in the distribution of the shares of those
Classes, including the payment of commissions for sales of the shares of those
Classes and incentive compensation to and expenses of 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 year ended October 31, 1997, Class B shares of the Fund
accrued payments under the Plan amounting to $510,120, which amount is equal to
1.0% of the average daily net assets of Class B for the fiscal year. These
payments were calculated pursuant to clause (b) of the compensation formula
under the Plan. All shares held prior to July 28, 1997 have been designated
Class B shares. For the fiscal period July 28 through October 31, 1997, Class A
and Class C shares of the Fund accrued
    
 
                                       26
<PAGE>
   
payments under the Plan amounting to $14 and $938, respectively, which amounts
on an annualized basis are equal to 0.25% and 1.00% of the average daily net
assets of Class A and Class C, respectively, for such period.
    
 
   
    In the case of Class B shares, at any given time, the expenses in
distributing Class B shares of the Fund may be in excess of the total of (i) the
payments made by the Fund pursuant to the Plan, and (ii) the proceeds of CDSCs
paid by investors upon the redemption of Class B shares. For example, if $1
million in expenses in distributing Class B shares of the Fund had been incurred
and $750,000 had been received as described in (i) and (ii) above, the excess
expense would amount to $250,000. The Distributor has advised the Fund that such
excess amounts, including the carrying charge described above, totalled
$3,486,664 at October 31, 1997, which was equal to 9.18% of the net assets of
Class B on such date. Because there is no requirement under the Plan that the
Distributor be reimbursed for all distribution expenses or any requirement that
the Plan be continued from year to year, such excess amount does not constitute
a liability of the Fund. Although there is no legal obligation for the Fund to
pay expenses incurred in excess of payments made to the Distributor under the
Plan, and the proceeds of CDSCs paid by investors upon redemption of shares, if
for any reason the Plan is terminated the Trustees will consider at that time
the manner in which to treat such expenses. Any cumulative expenses incurred,
but not yet recovered through distribution fees or CDSCs, may or may not be
recovered through future distribution fees or CDSCs.
    
 
    In the case of Class A and Class C shares, expenses incurred pursuant to the
Plan in any calendar year in excess of 0.25% or 1.0% of the average daily net
assets of Class A or Class C, respectively, will not be reimbursed by the Fund
through payments in any subsequent year, except that expenses representing a
gross sales commission credited to account executives at the time of sale may be
reimbursed in the subsequent calendar year. No interest or other financing
charges will be incurred on any Class A or Class C distribution expenses
incurred by the Distributor under the Plan or on any unreimbursed expenses due
to the Distributor pursuant to the Plan.
 
DETERMINATION OF NET ASSET VALUE
 
    The net asset value per share is determined once daily at 4:00 p.m., New
York time (or, on days when the New York Stock Exchange closes prior to 4:00
p.m., at such earlier time) on each day that the New York Stock Exchange is open
by taking the net assets of the Fund, dividing by the number of shares
outstanding and adjusting to the nearest cent. The assets belonging to the Class
A, Class B, Class C and Class D shares will be invested together in a single
portfolio. The net asset value of each Class, however, will be determined
separately by subtracting each Class's accrued expenses and liabilities. The net
asset value per share will not be determined on Good Friday and on such other
federal and non-federal holidays as are observed by the New York Stock Exchange.
 
    In the calculation of the Fund's net asset value: (1) an equity portfolio
security listed or traded on the New York or American Stock Exchange or other
domestic or foreign stock exchange is valued at its latest sale price on that
exchange prior to the time assets are valued; if there were no sales that day,
the security is valued at the latest bid price (in cases where a security is
traded on more than one exchange, the security is valued on the exchange
designated as the primary market pursuant to procedures adopted by the
Trustees), and (2) all other portfolio securities for which over-the-counter
market quotations are readily available are valued at the latest bid price. When
market quotations are not readily available, including circumstances under which
it is determined by the Investment Manager that the sale or bid prices are not
reflective of a security's market value, portfolio securities are valued at
their fair value as determined in good faith under procedures established by and
under the general supervision of the Fund's Trustees. For valuation purposes,
quotations of foreign portfolio securities, other assets and liabilities and
forward contracts stated in foreign currency
 
                                       27
<PAGE>
are translated into U.S. dollar equivalents at the prevailing market rates prior
to the close of the New York Stock Exchange. Dividend income and other
distributions are recorded on the ex-dividend date, except for certain dividends
from foreign securities which are recorded as soon as the Fund is informed after
the ex-dividend date.
 
    Short-term debt securities with remaining maturities of sixty days or less
to maturity at the time of purchase are valued at amortized cost, unless the
Trustees determine such does not reflect the securities' market value, in which
case these securities will be valued at their fair value as determined by the
Trustees.
 
    Certain of the Fund's portfolio securities may be valued by an outside
pricing service approved by the Fund's Trustees. The pricing service may utilize
a matrix system incorporating security quality, maturity and coupon as the
evaluation model parameters, and/or research evaluations by its staff, including
review of broker-dealer market price quotations in determining what it believes
is the fair valuation of the portfolio securities valued by such pricing
service.
 
    Gold and silver bullion will be valued at the last spot settlement price on
the Commodity Exchange, Inc. and other precious metals (such as platinum and
palladium) and minerals will be valued at the last spot settlement price or, if
not available, the settlement price of the nearest contract month on the New
York Mercantile Exchange. If prices are not available on any of these exchanges
on any given day, the relevant precious metal or mineral will be valued at
prices in the bullion markets or other markets approved by the Trustees for that
purpose; if there is no readily available market quotation, then bullion will be
valued in a manner, at fair value, as determined in good faith by the Trustees.
 
    Generally, trading in foreign securities, as well as corporate bonds, United
States government securities and money market instruments, is substantially
completed each day at various times prior to the close of the New York Stock
Exchange. The values of such securities used in computing the net asset value of
the Fund's shares are determined as of such times. Foreign currency exchange
rates are also generally determined prior to the close of the New York Stock
Exchange. Occasionally, events which affect the values of such securities and
such exchange rates may occur between the times at which they are determined and
the close of the New York Stock Exchange and will therefore not be reflected in
the computation of the Fund's net asset value. If events materially affecting
the value of such securities occur during such period, then these securities
will be valued at their fair value as determined in good faith under procedures
established by and under the supervision of the Trustees.
 
SHAREHOLDER SERVICES
- --------------------------------------------------------------------------------
 
    AUTOMATIC INVESTMENT OF DIVIDENDS AND DISTRIBUTIONS.  All income dividends
and capital gains distributions are automatically paid in full and fractional
shares of the applicable Class of the Fund (or, if specified by the shareholder,
in shares of any other open-end Dean Witter Fund), unless the shareholder
requests that they be paid in cash. Shares so acquired are acquired at net asset
value and are not subject to the imposition of a front-end sales charge or a
CDSC (see "Redemptions and Repurchases").
 
    INVESTMENT OF DIVIDENDS AND DISTRIBUTIONS RECEIVED IN CASH.  Any shareholder
who receives a cash payment representing a dividend or capital gains
distribution may invest such dividend or distribution in shares of the
applicable Class at the net asset value per share next determined after receipt
by the Transfer Agent, by returning the check or the proceeds to the Transfer
Agent within thirty days after the payment date. Shares so acquired are acquired
at net asset value and are not subject to the imposition of a front-end sales
charge or a CDSC (see "Redemptions and Repurchases").
 
    EASYINVEST-SM-.  Shareholders may subscribe to EasyInvest, an automatic
purchase plan which provides for any amount from $100 to $5,000 to be
 
                                       28
<PAGE>
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 dollar amount, not less than $25, or in any whole
percentage of the account balance, on an annualized basis. Any applicable CDSC
will be imposed on the 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 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 any Exchange Fund that is not a money market fund is on the basis
of the next calculated net asset value per share of each fund after the exchange
order is received. When exchanging into a money market fund from the Fund,
shares of the Fund are redeemed out of the Fund at their next calculated net
asset value and the proceeds of the redemption are used to purchase shares of
the money market fund at their net asset value determined the following business
day. Subsequent exchanges between any of the money market funds and any of the
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.
    
 
                                       29
<PAGE>
   
    No CDSC is imposed at the time of any exchange of shares although any
applicable CDSC will be imposed upon ultimate redemption. During the period of
time the shareholder remains in an Exchange Fund, (calculated from the last day
of the month in which the Exchange Fund shares were acquired), the holding
period (for the purpose of determining the rate of the CDSC) is frozen. If those
shares are subsequently re-exchanged for shares of a 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 of the Fund exchanged into an
Exchange Fund, upon a redemption of shares which results in a CDSC being
imposed, a credit (not to exceed the amount of the CDSC) will be given in an
amount equal to the Exchange Fund 12b-1 distribution fees incurred on or after
that date which are attributable to those shares. (Exchange Fund 12b-1
distribution fees, if any, 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 examine it carefully
before investing. Exchanges are subject to the minimum investment requirement of
each Class of shares and any other conditions imposed by each fund. In the case
of a shareholder holding a share certificate or certificates, no exchanges may
be made until all applicable share certificates have been received by the
Transfer Agent and deposited in the shareholder's account. An exchange will be
treated for federal income tax purposes the same as a repurchase or redemption
of shares, on which the shareholder may realize a capital gain or loss. However,
the ability to deduct capital losses on an exchange may be limited in situations
where there is an exchange of shares within ninety days after the shares are
purchased. The Exchange Privilege is only available in states where an exchange
may legally be made.
 
                                       30
<PAGE>
   
    If DWR or other Selected Broker-Dealer is the current dealer of record and
its account numbers are part of the account information, shareholders may
initiate an exchange of shares of the Fund for shares of any of the Dean Witter
Funds (for which the Exchange Privilege is available) pursuant to this Exchange
Privilege by contacting their DWR account executive (no Exchange Privilege
Authorization Form is required). Other shareholders (and those shareholders who
are clients of DWR or another Selected Broker-Dealer but who wish to make
exchanges directly by writing or telephoning the Transfer Agent) must complete
and forward to the Transfer Agent an Exchange Privilege Authorization Form,
copies of which may be obtained from the Transfer Agent, to initiate an
exchange. If the Authorization Form is used, exchanges may be made in writing or
by contacting the Transfer Agent at (800) 869-NEWS (toll-free). The Fund will
employ reasonable procedures to confirm that exchange instructions communicated
over the telephone are genuine. Such procedures may include requiring various
forms of personal identification such as name, mailing address, Social Security
or other tax identification number and DWR or other Selected Broker-Dealer
account number (if any). Telephone instructions may also be recorded. If such
procedures are not employed, the Fund may be liable for any losses due to
unauthorized or fraudulent instructions.
    
 
    Telephone exchange instructions will be accepted if received by the Transfer
Agent between 9:00 a.m. and 4:00 p.m. New York time, on any day the New York
Stock Exchange is open. Any shareholder wishing to make an exchange who has
previously filed an Exchange Privilege Authorization Form and who is unable to
reach the Fund by telephone should contact his or her DWR or other Selected
Broker-Dealer account executive, if appropriate, or make a written exchange
request. Shareholders are advised that during periods of drastic economic or
market changes, it is possible that the telephone exchange procedures may be
difficult to implement, although this has not been the case with the Dean Witter
Funds in the past.
 
    Shareholders should contact their DWR or other Selected Broker-Dealer
account executive or the Transfer Agent for further information about the
Exchange Privilege.
 
REDEMPTIONS AND REPURCHASES
- --------------------------------------------------------------------------------
 
    REDEMPTION.  Shares of 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 information required by
the Transfer Agent.
 
    REPURCHASE.  DWR and other Selected Broker-Dealers are authorized to
repurchase shares represented by a share certificate which is delivered to any
of their offices. Shares held in a shareholder's account without a share
certificate may also be repurchased by DWR and other Selected Broker-Dealers
upon the telephonic request of the shareholder. The repurchase price is the net
asset value next computed (see "Purchase of Fund Shares") after such repurchase
order is received by DWR or other Selected Broker-Dealer, reduced by any
applicable CDSC.
 
    The CDSC, if any, will be the only fee imposed by the Fund or the
Distributor. The offers 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
 
                                       31
<PAGE>
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 net asset value next determined after a reinstatement request,
together with the proceeds, is received by the Transfer Agent and receive a pro-
rata credit for any CDSC paid in connection with such redemption or repurchase.
 
    INVOLUNTARY REDEMPTION.  The Fund reserves the right, on sixty days' notice,
to redeem, at their net asset value, the shares of any shareholder (other than
shares held in an Individual Retirement Account or Custodial Account under
Section 403(b)(7) of the Internal Revenue Code) whose shares have a value of
less than $100 or such lesser amount as may be fixed by the Fund's Trustees or,
in the case of an account opened through EasyInvest-SM-, if after twelve months
the shareholder has invested less than $1,000 in the account. However, before
the Fund redeems such shares and sends the proceeds to the shareholder, it will
notify the shareholder that the value of the shares is less than the applicable
amount and allow the shareholder sixty days 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 its net
investment income and net realized short-term and net long-term capital gains,
if any, at least once each year. The Fund may, however, determine either to
distribute or to retain all or part of any net long-term capital gains in any
year for reinvestment.
 
    All dividends and any capital gains distributions will be paid in additional
shares of the same Class and automatically credited to the shareholder's account
without issuance of a share certificate unless the shareholder requests in
writing that all dividends and/ or distributions be paid in cash. Shares
acquired by dividend and distribution reinvestments will not be subject to any
front-end sales charge or CDSC. Class B shares acquired through dividend and
distribution reinvestments will become eligible for conversion to Class A shares
on a pro rata basis. Distributions paid on Class A and Class D shares will be
higher than for Class B and Class C shares because distribution fees paid by
Class B and Class C shares are higher. (See "Shareholder Services -- Automatic
Investment of Dividends and Distributions.")
 
    TAXES.  Because the Fund intends to distribute all of its net investment
income and net capital gains to shareholders and otherwise remain qualified as a
regulated investment company under Subchapter M of the Internal Revenue Code,
(the "Code"), it is not expected that the Fund will be required to pay any
federal income tax on such income and capital gains. Shareholders who are
required to pay taxes on their income will normally
 
                                       32
<PAGE>
have to pay Federal income taxes, and any applicable state and/or local income
taxes, on the dividends and distributions they receive from the Fund. Such
dividends and distributions, to the extent that they are derived from net
investment income and net short-term capital gains, are taxable to the
shareholder as ordinary dividend 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, 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.
    
 
    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.
 
   
    Dividends, interest and gains received by the Fund may give rise to
withholding and other taxes imposed by foreign countries. If it qualifies for
and has made the appropriate election with the Internal Revenue Service, the
Fund will report annually to its shareholders the amount per share of such
taxes, to enable shareholders to claim United States foreign tax credits or
deductions with respect to such taxes. In the absence of such an election, the
Fund would deduct foreign tax in computing the amount of its distributable
income.
    
   
    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.
    
   
    After the end of the year, shareholders will receive 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 who are not
citizens or residents of, or entities organized in the United States, may be
subject to withholding taxes of up to 30% on certain payments received from the
Fund.
    
    The foregoing discussion relates solely to the federal income tax
consequences of an investment in the Fund. Distributions may also be subject to
state and local taxes; therefore, each shareholder is advised to consult his or
her own tax adviser.
 
PERFORMANCE INFORMATION
- --------------------------------------------------------------------------------
 
    From time to time the Fund may quote its "total return" in advertisements
and sales literature. These figures are computed separately for Class A, Class
B, Class C and Class D shares. The total return of the Fund is based on
historical earnings and is not intended to indicate future performance. The
"average annual total return" of the Fund refers to a figure reflecting the
average annualized percentage increase (or decrease) in the value of an initial
investment in a Class of the Fund of $1,000 over periods of one, five and ten
years, or over the life of the Fund if less than any of the foregoing. Average
annual total return reflects all income earned by the Fund, any appreciation or
depreciation of the Fund's assets, all
 
                                       33
<PAGE>
expenses incurred by the applicable Class and all sales charges which would be
incurred by shareholders, for the stated periods. It also assumes reinvestment
of all dividends and distributions paid by the Fund.
   
    In addition to the foregoing, the Fund may advertise its total return for
each Class over different periods of time by means of aggregate, average, and
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
circumstances, be held personally liable as partners for obligations of the
Fund. However, the Declaration of Trust contains an express disclaimer of
shareholder liability for acts or obligations of the Fund, requires that Fund
obligations include such disclaimer and provides for indemnification and
reimbursement of expenses out of the Fund's property for any shareholder held
personally liable for the obligations of the Fund. Thus, the risk of a
shareholder incurring financial loss on account of shareholder liability is
limited to circumstances in which the Fund itself would be unable to meet its
obligations. Given the above limitations on shareholder personal liability and
the nature of the Fund's assets and operations, the possibility of the Fund
being unable to meet its obligations is remote and thus, in the opinion of
Massachusetts counsel to the Fund, the risk to Fund shareholders of personal
liability is remote.
 
    CODE OF ETHICS.  Directors, officers and employees of InterCapital, Dean
Witter Services Company Inc. and the Distributor are subject to a strict Code of
Ethics adopted by those companies. The Code of Ethics is intended to ensure that
the interests of shareholders and other clients are placed ahead of any personal
interest, that no undue personal benefit is obtained from a person's employment
activities and that actual and potential conflicts of interest are avoided. To
achieve these goals and comply with regulatory requirements, the Code of Ethics
requires, among other things, that personal securities transactions by employees
of the companies be subject to an advance clearance process to monitor that no
Dean Witter Fund is engaged at the same time in a purchase or sale of the same
security. The Code of Ethics bans the purchase of securities in an initial
public offering, and also prohibits engaging in futures and options transactions
and profiting on short-term trading (that is, a purchase within sixty days of a
sale or a sale within sixty days of a purchase) of a security. In addition,
investment personnel may not purchase or sell a security for their personal
account within thirty days before or after any transaction in any Dean Witter
 
                                       34
<PAGE>
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.
    
 
                                       35
<PAGE>
Dean Witter
Precious Metals and Minerals Trust
Two World Trade Center
New York, New York 10048
 
TRUSTEES
 
   
Michael Bozic
Charles A. Fiumefreddo
Edwin J. Garn
John R. Haire
Wayne E. Hedien
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
Robert Rossetti
Vice President
Thomas F. Caloia
Treasurer
 
CUSTODIAN
 
The Bank of New York
90 Washington Street
New York, New York 10286
 
TRANSFER AGENT AND
DIVIDEND DISBURSING AGENT
 
   
Dean Witter Trust FSB
Harborside Financial Center
Plaza Two
Jersey City, New Jersey 07311
    
 
INDEPENDENT ACCOUNTANTS
 
Price Waterhouse LLP
1177 Avenue of the Americas
New York, New York 10036
 
INVESTMENT MANAGER
 
Dean Witter InterCapital Inc.
 
DEAN WITTER
PRECIOUS METALS
AND MINERALS TRUST
 
   
                              [PHOTO]
                                                 PROSPECTUS -- DECEMBER 30, 1997
    
<PAGE>
 
   
STATEMENT OF ADDITIONAL INFORMATION     DEAN WITTER
                                        PRECIOUS METALS
DECEMBER 30, 1997                       AND MINERALS TRUST
 
- --------------------------------------------------------------------------------
    
 
    Dean Witter Precious Metals and Minerals Trust (the "Fund") is an open-end,
diversified management investment company, whose investment objective is capital
appreciation. The Fund seeks to achieve its investment objective by investing in
the securities of foreign and domestic companies engaged in the exploration,
mining, fabrication, distribution, processing or trading of precious metals and
minerals or in companies engaged in financing, managing, controlling or
operating companies engaged in these activities and also by investing a portion
of its assets in gold, silver, platinum and palladium bullion and coins. See
"Investment Practices and Policies."
 
   
    A Prospectus for the Fund dated December 30, 1997, which provides the basic
information you should know before investing in the Fund, may be obtained
without charge from the Fund at the 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
Precious Metals and
Minerals Trust
Two World Trade Center
New York, New York 10048
(212) 392-2550 or
(800) 869-NEWS (toll-free)
<PAGE>
TABLE OF CONTENTS
- --------------------------------------------------------------------------------
 
   
<TABLE>
<S>                                                                         <C>
The Fund and Its Management..............................................     3
 
Trustees and Officers....................................................     6
 
Investment Practices and Policies........................................    12
 
Investment Restrictions..................................................    23
 
Portfolio Transactions and Brokerage.....................................    24
 
The Distributor..........................................................    26
 
Determination of Net Asset Value.........................................    31
 
Purchase of Fund Shares..................................................    31
 
Shareholder Services.....................................................    34
 
Redemptions and Repurchases..............................................    38
 
Dividends, Distributions and Taxes.......................................    40
 
Performance Information..................................................    41
 
Description of Shares of the Fund........................................    43
 
Custodian and Transfer Agent.............................................    43
 
Independent Accountants..................................................    43
 
Reports to Shareholders..................................................    44
 
Legal Counsel............................................................    44
 
Experts..................................................................    44
 
Registration Statement...................................................    44
 
Financial Statements--October 31, 1997...................................    45
 
Report of Independent Accountants........................................    58
</TABLE>
    
 
                                       2
<PAGE>
THE FUND AND ITS MANAGEMENT
- --------------------------------------------------------------------------------
 
THE FUND
 
    The Fund is a Trust of the type commonly known as a "Massachusetts business
trust" and was organized under the laws of the Commonwealth of Massachusetts on
December 28, 1989.
 
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, Discover & Co. ("MSDWD"), 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 Dean Witter InterCapital Inc.
thereafter.) The daily management of the Fund is conducted by or under the
direction of officers of the Fund and of the Investment Manager, subject to
review by the Fund's Trustees. Information as to these Trustees and Officers is
contained under the caption "Trustees and Officers."
 
   
    InterCapital is also the investment manager or investment adviser of the
following investment companies: Active Assets Money Trust, Active Assets
Tax-Free Trust, Active Assets California Tax-Free Trust, Active Assets
Government Securities Trust, Dean Witter Liquid Asset Fund Inc., InterCapital
Income Securities Inc., Dean Witter High Yield Securities Inc., Dean Witter
Tax-Free Daily Income Trust, Dean Witter Tax-Exempt Securities Trust, Dean
Witter Dividend Growth Securities Inc., Dean Witter Natural Resource Development
Securities Inc., Dean Witter American Value Fund, Dean Witter Developing Growth
Securities Trust, Dean Witter U.S. Government Money Market Trust, Dean Witter
Variable Investment Series, Dean Witter World Wide Investment Trust, Dean Witter
Select Municipal Reinvestment Fund, Dean Witter U.S. Government Securities
Trust, Dean Witter California Tax-Free Income Fund, Dean Witter New York
Tax-Free Income Fund, Dean Witter Convertible Securities Trust, Dean Witter
Federal Securities Trust, Dean Witter Value-Added Market Series, High Income
Advantage Trust, High Income Advantage Trust II, High Income Advantage Trust
III, Dean Witter Government Income Trust, Dean Witter Utilities Fund, Dean
Witter California Tax-Free Daily Income Trust, Dean Witter Strategist Fund, Dean
Witter World Wide Income Trust, Dean Witter Intermediate Income Securities, Dean
Witter Capital Growth Securities, Dean Witter New York Municipal Money Market
Trust, Dean Witter European Growth Fund Inc., Dean Witter Pacific Growth Fund
Inc., Dean Witter Global Short-Term Income Fund Inc., Dean Witter Multi-State
Municipal Series Trust, Dean Witter Short-Term U.S. Treasury Trust, InterCapital
Insured Municipal Bond Trust, InterCapital Insured Municipal Trust, InterCapital
Quality Municipal Investment Trust, InterCapital Quality Municipal Income Trust,
InterCapital Insured Municipal Income Trust, InterCapital California Insured
Municipal Income Trust, Dean Witter Diversified Income Trust, Dean Witter Health
Sciences Trust, Dean Witter Retirement Series, Dean Witter Global Dividend
Growth Securities, Dean Witter Limited Term Municipal Trust, Dean Witter
Short-Term Bond Fund, InterCapital Quality Municipal Securities, InterCapital
California Quality Municipal Securities, InterCapital New York Quality Municipal
Securities, InterCapital Insured Municipal Securities, InterCapital Insured
California Municipal Securities, Dean Witter Global Utilities Fund, Dean Witter
International SmallCap Fund, Dean Witter Mid-Cap Growth Fund, Dean Witter Select
Dimensions Investment Series, Dean Witter Global Asset Allocation Fund, Dean
Witter Balanced Growth, Dean Witter Balanced Income Fund, Dean Witter Hawaii
Municipal Trust, Dean Witter Capital Appreciation Fund, Dean Witter Information
Fund, Dean Witter Intermediate Term U.S. Treasury Trust, Dean Witter Japan Fund,
Dean Witter Income Builder Fund, Dean Witter Special Value Fund, Dean Witter
Financial Services Trust, Dean Witter Market Leader Trust, Dean Witter S&P 500
Index Fund, Dean Witter Fund of Funds, Municipal Income Trust, Municipal Income
Trust II, Municipal Income Trust III, Municipal Income Opportunities Trust,
Municipal Income Opportunities Trust II, Municipal Income Opportunities Trust
III, Municipal Premium Income Trust and Prime Income Trust. The foregoing
investment companies, together with the Fund, are collectively referred to
    
 
                                       3
<PAGE>
   
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 companies for which TCW Funds Management, Inc. is the investment
adviser: TCW/DW Core Equity Trust, TCW/DW North American Government Income
Trust, TCW/DW Latin American Growth Fund, TCW/DW Income and Growth Fund, TCW/ DW
Small Cap Growth Fund, TCW/DW Balanced Fund, TCW/DW Total Return Trust, TCW/DW
Mid-Cap Equity Trust, TCW/DW Global Telecom Trust, TCW/DW Strategic Income
Trust, TCW/DW Emerging Markets Opportunities Trust, TCW/DW Term Trust 2000,
TCW/DW Term Trust 2002 and TCW/DW Term Trust 2003 (the "TCW/DW Funds").
InterCapital also serves as (i) administrator of The Black Rock Strategic Term
Trust Inc., a closed-end investment company; (ii) sub-administrator of Mass
Mutual Participation Investors and Templeton Global Governments Income Trust,
closed-end investment companies; 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.
    
 
    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 objectives.
 
    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, 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.
 
    Effective December 31, 1993, pursuant to a Services Agreement between
InterCapital and DWSC, DWSC began to provide the administrative services to the
Fund which were previously performed directly by InterCapital. On April 17,
1995, DWSC was reorganized in the State of Delaware, necessitating the entry
into a new Services Agreement by InterCapital and DWSC on that date. The
foregoing internal reorganizations did not result in any change in the nature or
scope of the administrative services being provided to the Fund or any of the
fees being paid by the Fund for the overall services being performed under the
terms of the existing Management Agreement.
 
   
    Expenses not expressly assumed by the Investment Manager under the Agreement
or by the Distributor of the Fund's shares, Dean Witter Distributors Inc.
("Distributors" or the "Distributor") (see "The Distributor") will be paid by
the Fund. The 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
    
 
                                       4
<PAGE>
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 at an annual rate of
0.80% of the daily net assets of the Fund. The management fee is allocated among
the Classes pro rata based on the net assets of the Fund attributable to each
Class. Total compensation accrued to the Investment Manager under the Agreement
for the fiscal years ended October 31, 1995, October 31, 1996 and October 31,
1997 was $516,929, $523,635 and $408,911, respectively.
    
 
    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 has paid the organizational expenses of the Fund
incurred prior to the offering of the Fund's shares. The Fund has reimbursed the
Investment Manager for such expenses. The Fund has deferred and is amortizing
the reimbursed expenses on the straight line method over a period not to exceed
five years from the date of commencement of the Fund's operations.
 
    The Agreement was initially approved by the Board of Trustees on February
21, 1997 and by the Shareholders of the Fund at a Special Meeting of
Shareholders held on May 21, 1997. The Agreement is substantially identical to a
prior investment management agreement which was initially approved by the Board
of Trustees on October 30, 1992 and by the Shareholders of the Fund at a Special
Meeting of Shareholders on January 12, 1993. The Agreement took effect on May
31, 1997 upon the consummation of the merger of Dean Witter, Discover & Co. with
Morgan Stanley Group Inc. The Agreement may be terminated at any time, without
penalty, on thirty days' notice by the Board of Trustees of the Fund, by the
holders of a majority as defined in the Investment Company Act of 1940, as
amended (the "Act"), of the outstanding shares of the Fund, 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 had an initial term ending April 30, 1999,
and will remain in effect from year to year thereafter, provided continuance of
the Agreement is approved at least annually by the vote of the holders of a
majority, as defined in the Act, of the outstanding shares of the Fund, or by
the Trustees of the Fund; provided that in either event such continuance is
approved annually by the vote of a majority of the Trustees of the Fund who are
not parties to the Agreement or "interested persons" (as defined in the Act) of
any such party (the "Independent Trustees"), which vote must be cast in person
at a meeting called for the purpose of voting on such approval.
 
   
    The following owned 5% or more of the outstanding shares of Class A on
November 30, 1997: Dean Witter InterCapital Inc., Attn: Frank DeVito, 2 World
Trade Center, 73rd Floor, New York, NY 10048-- 26.7%; Dean Witter Trust
Custodian for Susan K. Daniels 403(B) Transfer and Rollover Account,
    
 
                                       5
<PAGE>
   
222 47th Street NW, Canton, OH 44709--25.2%; Dean Witter Reynolds Custodian for
Ernest L. Pontius IRA STD/Rollover DTD, 1855 Manchester Circle, Fallon, NV
89406--32.9%; and Katherine C. Cathrae and Jean Marie Cathrae JT TEN, 1408 South
Orange Avenue, Sarasota, FL 34239--12.6%.
    
 
   
    The following owned 5% or more of the outstanding shares of Class C on
November 30, 1997: Neil Pollock and Norma Jean Pollock JTWROS, 390 Red Oak
Avenue, Highland Park, IL 60035--17.4%; and Alan J. Stransky and Colleen R.
Stransky JTWROS, 11679 Valleybrook Place, Carmel, IN 46033--47.2%.
    
 
   
    The following owned 5% or more of the outstanding shares of Class D on
November 30, 1997: Dean Witter InterCapital Inc., Attn: Frank DeVito, 2 World
Trade Center, 73rd Floor, New York, NY 10048-- 99.9%.
    
 
    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.
 
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 83 Dean Witter Funds and the 14 TCW/DW Funds are shown
below.
 
   
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND AND ADDRESS                   PRINCIPAL OCCUPATION DURING LAST FIVE YEARS
- ------------------------------------------------------     ----------------------------------------------------------
<S>                                                        <C>
Michael Bozic (56) ...................................     Chairman and Chief Executive Officer of Levitz Furniture
Trustee                                                    Corporation (since November, 1995); Director or Trustee of
c/o Levitz Furniture Corporation                           the Dean Witter Funds; formerly President and Chief
6111 Broken Sound Parkway, N.W.                            Executive Officer of Hills Department Stores (May,
Boca Raton, Florida                                        1991-July, 1995); formerly variously Chairman, Chief
                                                           Executive Officer, President and Chief Operating Officer
                                                           (1987-1991) of the Sears Merchandise Group of Sears,
                                                           Roebuck and Co.; Director of Eaglemark Financial Services,
                                                           Inc., the United Negro College Fund and Weirton Steel Cor-
                                                           poration.
Charles A. Fiumefreddo* (64) .........................     Chairman, Chief Executive Officer and Director of
Chairman of the Board, President, Chief                    InterCapital, Distributors and DWSC; Executive Vice
 Executive Officer and Trustee                             President and Director of DWR; Chairman, Director or
Two World Trade Center                                     Trustee, President and Chief Executive Officer of the Dean
New York, New York                                         Witter Funds; Chairman, Chief Executive Officer and
                                                           Trustee of the TCW/DW Funds; Chairman and Director of Dean
                                                           Witter Trust FSB ("DWT"); Director and/or officer of
                                                           various MSDWD subsidiaries; formerly Executive Vice
                                                           President and Director of Dean Witter, Discover & Co.
                                                           (until February, 1993).
</TABLE>
    
 
                                       6
<PAGE>
   
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND AND ADDRESS                   PRINCIPAL OCCUPATION DURING LAST FIVE YEARS
- ------------------------------------------------------     ----------------------------------------------------------
<S>                                                        <C>
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 (1971-1974); formerly Astronaut,
Salt Lake City, Utah                                       Space Shuttle Discovery (April 12-19, 1985); Vice
                                                           Chairman, Huntsman Corporation (since January, 1993);
                                                           Director of Franklin Covey (time management systems), John
                                                           Alden Financial Corporation (health insurance), United
                                                           Space Alliance (joint venture between Lockheed Martin and
                                                           the Boeing Company) and Nuskin Asia Pacific (multilevel
                                                           marketing); member of the board of various civic and
                                                           charitable organizations.
John R. Haire (72) ...................................     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 of
New York, New York                                         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).
Wayne E. Hedien (63) .................................     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 Museum
 Weitzen Shalov & Wein                                     of Natural History; formerly associated with the Allstate
Counsel to the Independent Trustees                        Companies (1966-1994), most recently as Chairman of The
114 West 47th Street                                       Allstate Corporation (March, 1993-December, 1994) and
New York, New York                                         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 (48) ...........................     Senior Partner, Johnson Smick International, Inc., a
Trustee                                                    consulting firm; Co-Chairman and a founder of the Group of
c/o Johnson Smick International, Inc.                      Seven Council (G7C), an international economic commission;
1133 Connecticut Avenue, N.W.                              Director or Trustee of the Dean Witter Funds; Trustee of
Washington, D.C.                                           the TCW/DW Funds; Director of NASDAQ (since June, 1995);
                                                           Director of Greenwich Capital Markets Inc.
                                                           (broker-dealer); Chairman and Trustee of the Financial
                                                           Accounting Foundation (oversight organization for the
                                                           Financial Accounting Standards Board); formerly Vice
                                                           Chairman of the Board of Governors of the Federal Reserve
                                                           System (1986-1990) and Assistant Secretary of the U.S.
                                                           Treasury (1982-1986).
</TABLE>
    
 
                                       7
<PAGE>
   
<TABLE>
<CAPTION>
      NAME, AGE, POSITION WITH FUND AND ADDRESS                   PRINCIPAL OCCUPATION DURING LAST FIVE YEARS
- ------------------------------------------------------     ----------------------------------------------------------
<S>                                                        <C>
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 MSDWD, DWR and Novus Credit Services Inc.;
1585 Broadway                                              Director of InterCapital, DWSC and Distributors; Director
New York, New York                                         or Trustee of the Dean Witter Funds; Director and/or
                                                           officer of various MSDWD subsidiaries.
John L. Schroeder (67) ...............................     Retired; Director or Trustee of the Dean Witter Funds;
Trustee                                                    Director of Citizens Utilities Company; formerly Executive
c/o Gordon Altman Butowsky Weitzen                         Vice President and Chief Investment Officer of the Home
 Shalov & Wein                                             Insurance Company (August, 1991-September, 1995).
Counsel to the Independent Trustees
114 West 47th Street
New York, New York
Barry Fink (42) ......................................     Senior Vice President (since March, 1997) and Secretary
Vice President, Secretary                                  and General Counsel (since February, 1997) of InterCapital
 and General Counsel                                       and DWSC; Senior Vice President (since March, 1997) and
Two World Trade Center                                     Assistant Secretary and Assistant General Counsel (since
New York, New York                                         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.
Robert Rossetti (50) .................................     Vice President of InterCapital (since May, 1995); for-
Vice President                                             merly Vice President at Merrill Lynch & Co. Inc.
Two World Trade Center                                     (November, 1994-April, 1995) and prior thereto Vice
New York, New York                                         President at Prudential Securities for six years.
Thomas F. Caloia (51) ................................     First Vice President and Assistant Treasurer of Inter-
Treasurer                                                  Capital and DWSC; Treasurer of the Dean Witter Funds and
Two World Trade Center                                     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, Robert M. Scanlan, President and Chief Operating Officer of
InterCapital and DWSC, Executive Vice President of Distributors and DWT and
Director of DWT, Mitchell M. Merin, President and Chief Strategic Officer of
InterCapital and DWSC, Executive Vice President of Distributors and DWT and
Director of DWT, Executive Vice President, Chief Administrative Officer and
Director of DWR and Director of SPS Transaction Services, Inc. and various other
MSDWD subsidiaries, Robert S. Giambrone, Senior Vice President of InterCapital,
DWSC, Distributors and DWT and Director of DWT, Joseph J. McAlinden, Executive
Vice President and Chief Investment Officer of InterCapital and Director of DWT,
and Mark
    
 
                                       8
<PAGE>
   
Bavoso, Paul D. Vance and Ira N. 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, LouAnne D.
McInnis, Carsten Otto and Ruth Rossi, 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 currently 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 83 Dean Witter Funds,
comprised of 127 portfolios. As of November 30, 1997, the Dean Witter Funds had
total net assets of approximately $93.4 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, MSDWD. 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.
    
 
    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, 1996,
the three Committees held a combined total of sixteen 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.
 
                                       9
<PAGE>
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 Committee Chairman and Independent
Trustee of the Dean Witter Funds and as an Independent Trustee and, since July
1, 1996, 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 $1,000 ($800 after
December 31, 1997) 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.
    
 
                                       10
<PAGE>
   
    The following table illustrates the compensation paid to the Fund's
Independent Trustees by the Fund for the fiscal year ended October 31, 1997.
    
 
   
                               FUND COMPENSATION
    
 
   
<TABLE>
<CAPTION>
                                                                   AGGREGATE
                                                                 COMPENSATION
NAME OF INDEPENDENT TRUSTEE                                      FROM THE FUND
- --------------------------------------------------------------  ---------------
<S>                                                             <C>
Michael Bozic.................................................      $1,700
Edwin J. Garn.................................................       1,900
John R. Haire.................................................       3,850
Wayne E. Hedien...............................................         482
Dr. Manuel H. Johnson.........................................       1,850
Michael E. Nugent.............................................       1,900
John L. Schroeder.............................................       1,900
</TABLE>
    
 
   
    The following table illustrates the compensation paid to the Fund's
Independent Trustees for the calendar year ended December 31, 1996 for services
to the 82 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, 1996.
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    FOR SERVICE
                                                                    CHAIRMAN OF          AS          TOTAL CASH
                                                                   COMMITTEES OF     CHAIRMAN OF    COMPENSATION
                               FOR SERVICE                          INDEPENDENT     COMMITTEES OF   FOR SERVICES
                              AS DIRECTOR OR                         DIRECTORS/      INDEPENDENT         TO
                               TRUSTEE AND       FOR SERVICE AS     TRUSTEES AND    TRUSTEES AND       82 DEAN
                             COMMITTEE MEMBER     TRUSTEE AND          AUDIT            AUDIT          WITTER
                                OF 82 DEAN      COMMITTEE MEMBER   COMMITTEES OF    COMMITTEES OF     FUNDS AND
NAME OF                           WITTER          OF 14 TCW/DW     82 DEAN WITTER     14 TCW/DW       14 TCW/DW
INDEPENDENT TRUSTEE               FUNDS              FUNDS             FUNDS            FUNDS           FUNDS
- ---------------------------  ----------------   ----------------   --------------   -------------   -------------
<S>                          <C>                <C>                <C>              <C>             <C>
Michael Bozic..............      $138,850           --                 --               --            $138,850
Edwin J. Garn..............       140,900           --                 --               --             140,900
John R. Haire..............       106,400           $64,283           $195,450        $ 12,187         378,320
Dr. Manuel H. Johnson......       137,100            66,483            --               --             203,583
Michael E. Nugent..........       138,850            64,283            --               --             203,133
John L. Schroeder..........       137,150            69,083            --               --             206,233
</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
 
- ------------------------
    
   
(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.
    
 
                                       11
<PAGE>
   
for service to the Adopting Fund in the five year period prior to the date of
the Eligible Trustee's retirement. Benefits under the retirement program are not
secured or funded by the Adopting Funds.
    
 
   
    The following table illustrates the retirement benefits accrued to the
Fund's Independent Trustees by the 57 Dean Witter Funds (not including the Fund)
for the year ended December 31, 1996, 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, 1996.
    
 
   
                 RETIREMENT BENEFITS FROM ALL DEAN WITTER FUNDS
    
 
   
<TABLE>
<CAPTION>
                                                                                       RETIREMENT
                                                 ESTIMATED                              BENEFITS       ESTIMATED ANNUAL
                                              CREDITED YEARS         ESTIMATED         ACCRUED AS        BENEFITS UPON
                                               OF SERVICE AT       PERCENTAGE OF        EXPENSES          RETIREMENT
                                                RETIREMENT           ELIGIBLE            BY ALL        FROM ALL ADOPTING
NAME OF INDEPENDENT TRUSTEE                    (MAXIMUM 10)        COMPENSATION      ADOPTING FUNDS        FUNDS(2)
- ------------------------------------------  -------------------  -----------------  -----------------  -----------------
<S>                                         <C>                  <C>                <C>                <C>
Michael Bozic.............................              10               50.0%         $    20,147        $    51,325
Edwin J. Garn.............................              10               50.0               27,772             51,325
John R. Haire.............................              10               50.0               46,952            129,550
Wayne E. Hedien...........................               9               42.9        Not Applicable     Not Applicable
Dr. Manuel H. Johnson.....................               10               50.0              10,926              51,325
Michael E. Nugent.........................               10               50.0              19,217              51,325
John L. Schroeder.........................                8               41.7              38,700              42,771
</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.
    
 
   
    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
- --------------------------------------------------------------------------------
 
U.S. GOVERNMENT SECURITIES
 
    As discussed in the Prospectus, the Fund may invest up to 35% of its total
assets in, among other securities, securities issued by the U.S. Government, its
agencies or instrumentalities. Such securities include:
 
        (1) U.S. Treasury bills (maturities of one year or less), U.S. Treasury
    notes (maturities of one to ten years) and U.S. Treasury bonds (generally
    maturities of greater than ten years), all of which are direct obligations
    of the U.S. Government and, as such, are backed by the "full faith and
    credit" of the United States.
 
        (2) Securities issued by agencies and instrumentalities of the U.S.
    Government which are backed by the full faith and credit of the United
    States. Among the agencies and instrumentalities issuing such obligations
    are the Federal Housing Administration, the Government National Mortgage
    Association ("GNMA"), the Department of Housing and Urban Development, the
    Export-Import Bank, the Farmers Home Administration, the General Services
    Administration, the Maritime Administration and the Small Business
    Administration. The maturities of such obligations range from three months
    to 30 years.
 
        (3) Securities issued by agencies and instrumentalities which are not
    backed by the full faith and credit of the United States, but whose issuing
    agency or instrumentality has the right to borrow, to meet its obligations,
    from an existing line of credit with the U.S. Treasury. Among the agencies
 
                                       12
<PAGE>
    and instrumentalities issuing such obligations are the Tennessee Valley
    Authority, the Federal National Mortgage Association ("FNMA"), the Federal
    Home Loan Mortgage Corporation ("FHLMC") and the U.S. Postal Service.
 
        (4) Securities issued by agencies and instrumentalities which are not
    backed by the full faith and credit of the United States, but which are
    backed by the credit of the issuing agency or instrumentality. Among the
    agencies and instrumentalities issuing such obligations are the Federal Farm
    Credit System and the Federal Home Loan Banks.
 
    Neither the value nor the yield of the U.S. Government securities which may
be invested in by the Fund are guaranteed by the U.S. Government. Such values
and yield will fluctuate with changes in prevailing interest rates and other
factors. Generally, as prevailing interest rates rise, the value of any U.S.
Government securities held by the Fund will fall. Such securities with longer
maturities generally tend to produce higher yields and are subject to greater
market fluctuation as a result of changes in interest rates than debt securities
with shorter maturities. The Fund may invest up to 20% of its total assets in
long-term U.S. Government securities.
 
ZERO COUPON TREASURY SECURITIES
 
    A portion of the U.S. Government securities purchased by the Fund may be
"zero coupon" Treasury securities. These are U.S. Treasury bills, notes and
bonds which have been stripped of their unmatured interest coupons and receipts
or which are certificates representing interests in such stripped debt
obligations and coupons. Such securities are purchased at a discount from their
face amount, giving the purchaser the right to receive their full value at
maturity. A zero coupon security pays no interest to its holder during its life.
Its value to an investor consists of the difference between its face value at
the time of maturity and the price for which it was acquired, which is generally
an amount significantly less than its face value (sometimes referred to as a
"deep discount" price).
 
    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 if
prevailing interest rates rise. For this reason, zero coupon securities are
subject to substantially greater market price fluctuations during periods of
changing prevailing interest rates than are comparable debt securities which
make current distributions of interest. Current federal tax law requires that a
holder (such as the Fund) of a zero coupon security accrue a portion of the
discount at which the security was purchased as income each year even though the
Fund receives no interest payments in cash on the security during the year. See
"Dividends, Distributions and Taxes" for a discussion of the tax treatment of
zero coupon Treasury securities.
 
    Currently the only U.S. Treasury security issued without coupons is the
Treasury bill. However, in the last few years a number of banks and brokerage
firms have separated ("stripped") the principal portions from the coupon
portions of the U.S. Treasury bonds and notes and sold them separately in the
form of receipts or certificates representing undivided interests in these
instruments (which instruments are generally held by a bank in a custodial or
trust account).
 
FOREIGN SECURITIES
 
    As discussed in the Prospectus, investing in securities issued by companies
whose principal business activities are outside the United States may involve
risks not present in domestic investments. For example, there is generally less
publicly available information about foreign companies, particularly those not
subject to the disclosure and reporting requirements of the U.S. securities
laws. Foreign issuers are generally not bound by uniform accounting, auditing
and financial reporting requirements comparable to those applicable to U.S.
issuers. Foreign stock markets, while growing in volume and sophistication, are
generally not as developed as those in the U.S. and securities of some foreign
issuers, particularly those located in developing countries, may be less liquid
and more volatile than securities of comparable U.S. companies. Foreign
brokerage commissions are generally higher than
 
                                       13
<PAGE>
commissions on securities traded in the U.S. and foreign securities trading
practices, including those involving securities settlement, may expose the
Fund's portfolio to increased risk in the event of a failed trade or the
insolvency of a foreign broker-dealer. Moreover, there is generally less overall
governmental supervision and regulation of securities exchanges, brokers and
listed companies than in the U.S.
 
    Investments in foreign securities also involve the risk of possible adverse
changes in investment or exchange control regulations, expropriation or
confiscatory taxation, limitations on the removal of funds or other assets,
political or financial instability or diplomatic and other developments which
could affect such investments. In addition, since the securities of foreign
issuers are generally denominated in foreign currencies, fluctuations in
monetary exchange rates will affect the dollar value of the Fund's foreign
investments.
 
FOREIGN CURRENCY EXCHANGE TRANSACTIONS
 
    As discussed in the Prospectus, the Fund may enter into foreign currency
exchange transactions as a way of managing exchange rate risks. The Fund will
conduct its foreign currency exchange transactions either on a spot (i.e., cash)
basis at the spot rate prevailing in the foreign currency exchange market, or
through entering into forward contracts to purchase or sell foreign currencies.
A forward contract involves an obligation to purchase or sell a specific
currency at a future date, which may be any fixed number of days from the date
of the contract agreed upon by the parties, at a price set at the time of the
contract. These contracts are traded in the interbank market conducted directly
between currency traders (usually large, commercial banks) and their customers.
Such forward contracts will only be entered into with United States banks and
their foreign branches or foreign banks whose assets total $1 billion or more. A
forward contract generally has no deposit requirement, and no commissions are
charged at any stage for trades.
 
    The Fund may enter into a forward contract under the following
circumstances. First, when the Fund enters into a contract for the purchase or
sale of a security denominated in a foreign currency or is informed that it will
receive a dividend denominated in a foreign currency, it may desire to "lock in"
the U.S. dollar price of the security or the value of the dividend. By entering
into a forward contract for the purchase or sale, for a fixed amount of U.S.
dollars, of the amount of foreign currency involved in the underlying securities
transaction or dividend payment, the Fund will be able to protect itself against
a possible low resulting from and adverse change in the relationship between the
U.S. dollar and the respective foreign currency during the period between (i)
the time the security is purchased or sold and the date on which payment is made
or received or (ii) the time the dividend is declared by an issuer and the date
when it is received by the Fund. Second, when management of the Fund believes
that the currency of a particular foreign country may suffer a substantial
decline against the U.S. dollar, it may enter into a forward contract to sell,
for a fixed amount of dollars, the amount of foreign currency approximating the
value of some or all of the Fund's portfolio securities denominated in such
foreign currency. The Fund will also not enter into such forward contracts or
maintain a net exposure to such contracts where the consummation of the
contracts would obligate the Fund to deliver an amount of foreign currency in
excess of the value of the Fund's portfolio securities or other assets
denominated in that currency. Under normal circumstances, consideration of the
prospect for currency parities will be incorporated into the longer term
investment decisions made with regard to overall diversification strategies.
However, the Investment Manager believes that it is important to have the
flexibility to enter into such forward contracts when it determines that the
best interests of the Fund will be served. The Fund's custodian bank will place
cash, U.S. Government securities, debt securities or equity securities in a
separate account of the Fund in an amount equal to the value of the Fund's total
assets committed to the consummation of forward contracts entered into under the
circumstances set forth above. If the value of the securities placed in the
separate account declines, additional cash or securities will be placed in the
account on a daily basis so that the value of the account will equal the amount
of the Fund's commitments with respect to such contracts.
 
    At the maturity of a forward contract for delivery by the Fund of a foreign
currency, the Fund may either sell the portfolio security and make delivery of
the foreign currency, or it may retain the security and terminate its
contractual obligation to deliver the foreign currency by purchasing an
"offsetting"
 
                                       14
<PAGE>
contract with the same currency trader obligating it to purchase, on the same
maturity date, the same amount of the foreign currency. It is impossible to
forecast the market value of portfolio securities at the expiration of the
contract. Accordingly, it may be necessary for the Fund to purchase additional
foreign currency on the spot market (and bear the expense of such purchase) if
the market value of the security is less than the amount of foreign currency the
Fund is obligated to deliver and if a decision is made to sell the security and
make delivery of the foreign currency. Conversely, it may be necessary to sell
on the spot market some of the foreign currency received upon the sale of the
portfolio security if its market value exceeds the amount of foreign currency
the Fund is obligated to deliver.
 
    If the Fund retains the portfolio security and engages in an offsetting
transaction, the Fund will incur a gain or loss to the extent that there has
been movement in spot or forward contract prices. If the Fund engages in an
offsetting transaction, it may subsequently enter into a new forward contract to
sell the foreign currency. Should forward prices decline during the period
between the Fund's entering into a forward contract for the sale of a foreign
currency and the date it enters into an offsetting contract for the purchase of
the foreign currency, the Fund will realize a gain to the extent the price of
the currency it has agreed to sell exceeds the price of the currency it has
agreed to purchase. Should forward prices increase, the Fund will suffer a loss
to the extent the price of the currency it has agreed to purchase exceeds the
price of the currency it has agreed to sell. The Fund generally will not enter
into a forward contract for a term greater than one year.
 
    Although the Fund values its assets daily in terms of U.S. dollars, it does
not intend to convert its holdings of foreign currencies into U.S. dollars on a
daily basis. It will, however, do so from time to time, and investors should be
aware of the costs of currency conversion. Although foreign exchange dealers do
not charge a fee for conversion, they do realize a profit based on the spread
between the prices at which they are buying and selling various currencies.
Thus, a dealer may offer to sell a foreign currency to the Fund at one rate,
while offering a lesser rate of exchange should the Fund desire to resell that
currency to the dealer.
 
OPTIONS AND FUTURES TRANSACTIONS
 
    As discussed in the Prospectus, the Fund may write covered call options
against securities held in its portfolio and covered put options on eligible
portfolio securities and may purchase options of the same series to effect
closing transactions. The Fund may also hedge against potential changes in the
market value of its investments, or anticipated investments, by purchasing put
and call options on portfolio securities and engaging in transactions involving
futures contracts and options on such contracts.
 
    COVERED CALL WRITING.  As stated in the Prospectus, the Fund is permitted to
write covered call options on portfolio securities, without limit, in order to
aid in achieving its investment objectives. Generally, a call option is
"covered" if the Fund owns, or has the right to acquire, without additional cash
consideration (or for additional cash consideration held for the Fund by its
Custodian in a segregated account) the underlying security or currency subject
to the option except that in the case of call options on U.S. Treasury Bills,
the Fund might own U.S. Treasury Bills of a different series from those
underlying the call option, but with a principal amount and value corresponding
to the exercise price and a maturity date no later than that of the security
deliverable under the call option. A call option is also covered if the Fund
holds a call on the same security as the underlying security of the written
option, where the exercise price of the call used for coverage is equal to or
less than the exercise price of the call written or greater than the exercise
price of the call written if the mark to market difference is maintained by the
Fund in cash, U.S. Government securities or other liquid portfolio securities
which the Fund holds in a segregated account maintained with its Custodian.
 
   
    The Fund will receive from the purchaser, in return for a call it has
written, a "premium;" i.e., the price of the option. Receipt of these premiums
may better enable the Fund to earn a higher level of current income than it
would earn from holding the underlying securities or currencies alone. Moreover,
the premium received will offset a portion of the potential loss incurred by the
Fund if the securities underlying the option are ultimately sold or exchanged by
the Fund at a loss. The premium received will
    
 
                                       15
<PAGE>
fluctuate with varying economic market conditions. If the market value of the
portfolio securities upon which call options have been written increases, the
Fund may receive a lower total return from the portion of its portfolio upon
which calls have been written than it would have had such calls not been
written.
 
    As regards listed options and certain over-the-counter ("OTC") options,
during the option period, the Fund may be required, at any time, to deliver the
underlying security against payment of the exercise price on any calls it has
written (exercise of certain listed and OTC options may be limited to specific
expiration dates). This obligation is terminated upon the expiration of the
option period or at such earlier time when the writer effects a closing purchase
transaction. A closing purchase transaction is accom-
plished by purchasing an option of the same series as the option previously
written. However, once the Fund has been assigned an exercise notice, the Fund
will be unable to effect a closing purchase transaction.
 
    Closing purchase transactions are ordinarily effected to realize a profit on
an outstanding call option, to prevent an underlying security from being called,
to permit the sale of an underlying security or to enable the Fund to write
another call option on the underlying security with either a different exercise
price or expiration date or both. The Fund may realize a net gain or loss from a
closing purchase transaction depending upon whether the amount of the premium
received on the call option is more or less than the cost of effecting the
closing purchase transaction. Any loss incurred in a closing purchase
transaction may be wholly or partially offset by unrealized appreciation in the
market value of the underlying security. Conversely, a gain resulting from a
closing purchase transaction could be offset in whole or in part or exceeded by
a decline in the market value of the underlying security or currency.
 
    If a call option expires unexercised, the Fund realizes a gain in the amount
of the premium on the option less the commission paid. Such a gain, however, may
be offset by depreciation in the market value of the underlying security during
the option period. If a call option is exercised, the Fund realizes a gain or
loss from the sale of the underlying security equal to the difference between
the purchase price of the underlying security and the proceeds of the sale of
the security plus the premium received for on the option less the commission
paid.
 
    Options written by the Fund will normally have expiration dates of up to
eighteen months from the date written. The exercise price of a call option may
be below, equal to or above the current market value of the underlying security
at the time the option is written. See "Risks of Options and Futures
Transactions," below.
 
    COVERED PUT WRITING.  As stated in the Prospectus, the Fund may write
covered put options on portfolio securities. As a writer of a covered put
option, the Fund incurs an obligation to buy the security underlying the option
from the purchaser of the put, at the option's exercise price at any time during
the option period, at the purchaser's election (certain listed and OTC put
options written by the Fund will be exercisable by the purchaser only on a
specific date). A put is "covered" if, at all times, the Fund maintains, in a
segregated account maintained on its behalf at the Fund's Custodian, cash, U.S.
Government securities or other liquid portfolio securities in an amount equal to
at least the exercise price of the option, at all times during the option
period. Similarly, a short put position could be covered by the Fund by its
purchase of a put option on the same security as the underlying security of the
written option, where the exercise price of the purchased option is equal to or
more than the exercise price of the put written or less than the exercise price
of the put written if the marked to market difference is maintained by the Fund
in cash, U.S. Government securities or other liquid portfolio securities which
the Fund holds in a segregated account maintained at its Custodian. In writing
puts, the Fund assumes the risk of loss should the market value of the
underlying security decline below the exercise price of the option (any loss
being decreased by the receipt of the premium on the option written). In the
case of listed options, during the option period, the Fund may be required, at
any time, to make payment of the exercise price against delivery of the
underlying security. The operation of and limitations on covered put options in
other respects are substantially identical to those of call options.
 
                                       16
<PAGE>
    The Fund will write put options for three purposes: (1) to receive the
income derived from the premiums paid by purchasers; (2) when the Investment
Manager wishes to purchase the security underlying the option at a price lower
than its current market price, in which case it will write the covered put at an
exercise price reflecting the lower purchase price sought; and (3) to close out
a long put option position. The potential gain on a covered put option is
limited to the premium received on the option (less the commissions paid on the
transaction) while the potential loss equals the differences between the
exercise price of the option and the current market price of the underlying
securities when the put is exercised, offset by the premium received (less the
commissions paid on the transaction).
 
    PURCHASING CALL AND PUT OPTIONS.  As stated in the Prospectus, the Fund may
purchase listed and OTC call and put options in amounts equalling up to 10% of
its total assets. The Fund may purchase a call option in order to close out a
covered call position (see "Covered Call Writing" above), to protect against an
increase in price of a security it anticipates purchasing. The purchase of the
call option to effect a closing transaction on a call written over-the-counter
may be a listed or an OTC option. In either case, the call purchased is likely
to be on the same securities and have the same terms as the written option. If
purchased over-the-counter, the option would generally be acquired from the
dealer or financial institution which purchased the call written by the Fund.
 
    The Fund may purchase put options on securities which it holds in its
portfolio only to protect itself against a decline in the value of the security.
If the value of the underlying security were to fall below the exercise price of
the put purchased in an amount greater than the premium paid for the option, the
Fund would incur no additional loss. The Fund may also purchase put options to
close out written put positions in a manner similar to call options closing
purchase transactions. In addition, the Fund may sell a put option which it has
previously purchased prior to the sale of the securities underlying such option.
Such a sale would result in a net gain or loss depending on whether the amount
received on the sale is more or less than the premium and other transaction
costs paid on the put option which is sold. Any such gain or loss could be
offset in whole or in part by a change in the market value of the underlying
security. If a put option purchased by the Fund expired without being sold or
exercised, the premium would be lost.
 
    RISKS OF OPTIONS TRANSACTIONS.  During the option period, the covered call
writer has, in return for the premium on the option, given up the opportunity
for capital appreciation above the exercise price should the market price of the
underlying security increase, but has retained the risk of loss should the price
of the underlying security decline. The secured put writer also retains the risk
of loss should the market value of the underlying security decline below the
exercise price of the option less the premium received on the sale of the
option. In both cases, the writer has no control over the time when it may be
required to fulfill its obligation as a writer of the option. Once an option
writer has received an exercise notice, it cannot effect a closing purchase
transaction in order to terminate its obligation under the option and must
deliver or receive the underlying securities at the exercise price.
 
    Prior to exercise or expiration, an option position can only be terminated
by entering into a closing purchase or sale transaction. If a covered call
option writer is unable to effect a closing purchase transaction or to purchase
an offsetting OTC option, it cannot sell the underlying security until the
option expires or the option is exercised. Accordingly, a covered call option
writer may not be able to sell an underlying security at a time when it might
otherwise be advantageous to do so. A secured put option writer who is unable to
effect a closing purchase transaction or to purchase an offsetting OTC option
would continue to bear the risk of decline in the market price of the underlying
security until the option expires or is exercised. In addition, a secured put
writer would be unable to utilize the amount held in cash or U.S. Government or
other liquid portfolio securities as security for the put option for other
investment purposes until the exercise or expiration of the option.
 
    As discussed in the Prospectus, the Fund's ability to close out its position
as a writer of an option is dependent upon the existence of a liquid secondary
market on Option Exchanges. There is no assurance that such a market will exist,
particularly in the case of OTC options, as such options will generally only be
closed out by entering into a closing purchase transaction with the purchasing
dealer. However,
 
                                       17
<PAGE>
the Fund may be able to purchase an offsetting option which does not close out
its position as a writer but constitutes an asset of equal value to the
obligation under the option written. If the Fund is not able to either enter
into a closing purchase transaction or purchase an offsetting position, it will
be required to maintain the securities subject to the call, or the collateral
underlying the put, even though it might not be advantageous to do so, until a
closing transaction can be entered into (or the option is exercised or expires).
 
    Among the possible reasons for the absence of a liquid secondary market on
an Exchange are: (i) insufficient trading interest in certain options; (ii)
restrictions on transactions imposed by an Exchange; (iii) trading halts,
suspensions or other restrictions imposed with respect to particular classes or
series of options or underlying securities; (iv) interruption of the normal
operations on an Exchange; (v) inadequacy of the facilities of an Exchange or
the Options Clearing Corporation ("OCC") to handle current trading volume; or
(vi) a decision by one or more Exchanges to discontinue the trading of options
(or a particular class or series of options), in which event the secondary
market on that Exchange (or in that class or series of options) would cease to
exist, although outstanding options on that Exchange that had been issued by the
OCC as a result of trades on that Exchange would generally continue to be
exercisable in accordance with their terms.
 
    In the event of the bankruptcy of a broker through which the Fund engages in
transactions in options, the Fund could experience delays and/or losses in
liquidating open positions purchased or sold through the broker and/or incur a
loss of all or part of its margin deposits with the broker. Similarly, in the
event of the bankruptcy of the writer of an OTC option purchased by the Fund,
the Fund could experience a loss of all or part of the value of the option.
Transactions are entered into by the Fund only with brokers or financial
institutions deemed creditworthy by the Investment Manager.
 
    Each of the Exchanges has established limitations governing the maximum
number of call or put options on the same underlying security or futures
contract (whether or not covered) which may be written by a single investor,
whether acting alone or in concert with others (regardless of whether such
options are written on the same or different Exchanges or are held or written on
one or more accounts or through one or more brokers). An Exchange may order the
liquidation of positions found to be in violation of these limits and it may
impose other sanctions or restrictions. These position limits may restrict the
number of listed options which the Fund may write.
 
    The hours of trading for options may not conform to the hours during which
the underlying securities are traded. To the extent that the option markets
close before the markets for the underlying securities, significant price and
rate movements can take place in the underlying markets that cannot be reflected
in the option markets.
 
    FUTURES CONTRACTS AND OPTIONS THEREON.  As stated in the Prospectus, the
Fund may invest in futures contracts on precious metals ("futures contracts")
and related options thereon. These futures contracts and related options thereon
will be used only as a hedge against anticipated changes in the prices of
precious metals. A futures contract sale creates an obligation by the Fund, as
seller, to deliver cash or the specific type of instrument called for in the
contract at a specified future time for a specified price. A futures contract
purchase would create an obligation by the Fund, as purchaser, to take delivery
of cash or the specific type of financial instrument at a specified future time
at a specified price. The specific securities delivered or taken, respectively,
at settlement date would not be determined until or near that date. The
determination would be in accordance with the rules of the exchange on which the
futures contract sale or purchase was effected.
 
    Although the terms of futures contracts specify actual delivery or receipt
of securities or specific instrument, in most instances the contracts are closed
out before the settlement date without the making or taking of delivery. Closing
out of a futures contract is usually effected by entering into an offsetting
transaction. An offsetting transaction for a futures contract sale is effected
by the Fund entering into a futures contract purchase for the same aggregate
amount of the specific type of financial instrument and same delivery date. If
the price in the sale exceeds the price in the offsetting purchase, the Fund is
immediately paid the difference and thus realizes a gain. If the offsetting
purchase price exceeds the sale
 
                                       18
<PAGE>
price, the Fund pays the difference and realizes a loss. Similarly, the closing
out of a futures contract purchase is effected by the Fund entering into a
futures contract sale. If the offsetting sale price exceeds the purchase price,
the Fund realizes a gain, and if the offsetting sale price is less than the
purchase price, the Fund realizes a loss. 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 futures contracts and options thereon. The initial
margin requirements vary according to the type of the underlying security. 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 gain.
 
    OPTIONS ON FUTURES CONTRACTS.  The writer of an option on a futures contract
is required to deposit initial and variation margin pursuant to requirements
similar to those applicable to futures contracts. Premiums received from the
writing of an option on a futures contract are included in initial margin
deposits.
 
    RISKS OF TRANSACTIONS IN FUTURES CONTRACTS AND RELATED OPTIONS.  As stated
in the Prospectus, the Fund may sell a futures contract to protect against the
decline in the value of securities (or the currency in which they are
denominated) held by the Fund. However, it is possible that the futures market
may advance and the value of securities 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 assets it intends to buy, and the value of such assets decreases, then
the Fund may determine not to invest in the securities as planned and will
realize a loss on the futures contract that is not offset by a reduction in the
price of the securities.
 
    In order to assure that the Fund is entering into transactions in futures
contracts for hedging purposes as such is defined by the Commodity Futures
Trading Commission either: 1) a substantial majority (i.e., approximately 75%)
of all anticipatory hedge transactions (transactions in which the Fund does not
own at the time of the transaction, but expects to acquire, the securities
underlying the relevant futures contract) involving the purchase of futures
contracts will be completed by the purchase of securities which are the subject
of the hedge or 2) the underlying value of all long positions in futures
contracts will not exceed the total value of a) all short-term debt obligations
held by the Fund; b) cash held by the Fund; c) cash proceeds due to the Fund on
investments within thirty days; d) the margin deposited on the contracts; and e)
any unrealized appreciation in the value of the contracts.
 
    If the Fund has sold a call option 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 (currencies) underlying the futures contract or the exercise
price of the option. Such a position may also be covered by owning the
securities (currencies) underlying the futures contract, or by holding a call
option permitting the Fund to purchase the same contract at a price no higher
than the price at which the short position was established.
 
    In addition, if the Fund holds a long position in a futures contract or has
sold a put option on a futures contract, it will hold cash, U.S. Government
securities or other liquid portfolio securities, equal to the purchase price of
the contract or the exercise price of the put option (less the amount of initial
or
 
                                       19
<PAGE>
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 or options thereon, the Fund could experience delays
and/or losses in liquidating open positions purchased or sold through the broker
and/or incur a loss of all or part of its margin deposits with the broker.
Similarly, in the event of the bankruptcy of the writer of an OTC option
purchased by the Fund, the Fund could experience a loss of all or part of the
value of the option. Transactions are entered into by the Fund only with brokers
or financial institutions deemed creditworthy by the Investment Manager.
 
    While the futures contracts and options transactions to be engaged in by the
Fund for the purpose of hedging the Fund's portfolio securities are not
speculative in nature, there are risks inherent in the use of such instruments.
One such risk which may arise in employing futures contracts to protect against
the price volatility of Fund assets is that the prices subject to futures
contracts (and thereby the futures contract prices) may correlate imperfectly
with the behavior of the cash prices of the Fund's assets. A correlation may
also be distorted by the fact that the futures market is dominated by short-term
traders seeking to profit from the difference between a contract or asset price
objective and their cost of borrowed funds. Such distortions are generally minor
and would diminish as the contract approached maturity.
 
    As stated in the Prospectus, 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 assets which are the subject of the hedge. If
participants in the futures market elect to close out their contracts through
offsetting transactions rather than meet margin deposit requirements,
distortions in the normal relationship between the debt securities or currency
markets and futures markets could result. Price distortions could also result if
investors in futures contracts opt to make or take delivery of underlying assets
rather than engage in closing transactions due to the resultant reduction in the
liquidity of the futures market. In addition, due to the fact that, from the
point of view of speculators, the deposit requirements in the futures markets
are less onerous than margin requirements in the cash market, increased
participation by speculators in the futures market could cause temporary price
distortions. Due to the possibility of price distortions in the futures market
and because of the imperfect correlation between movements in the prices of
securities and movements in the prices of futures contracts, a correct forecast
of interest rate trends by the Investment Manager may still not result in a
successful hedging transaction.
 
    As stated in the Prospectus, there is no assurance that a liquid secondary
market will exist for futures contracts and related options in which the Fund
may invest. In the event a liquid market does not exist, it may not be possible
to close out a futures position, and in the event of adverse price movements,
the Fund would continue to be required to make daily cash payments of variation
margin. In addition, limitations imposed by an exchange or board of trade on
which futures contracts are traded may compel or prevent the Fund from closing
out a contract which may result in reduced gain or increased loss to the Fund.
The absence of a liquid market in futures contracts might cause the Fund to make
or take delivery of the underlying assets at a time when it may be
disadvantageous to do so.
 
                                       20
<PAGE>
    Compared to the purchase or sale of futures contracts, the purchase of call
or put options on futures contracts involves less potential risk to the Fund
because the maximum amount at risk is the premium paid for the options (plus
transaction costs). However, there may be circumstances when the purchase of a
call or put option on a futures contract would result in a loss to the Fund
notwithstanding that the purchase or sale of a futures contract would not result
in a loss, as in the instance where there is no movement in the prices of the
futures contract or underlying assets.
 
OTHER INVESTMENT POLICIES
 
    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. A
repurchase agreement may be viewed as a type of secured lending by the Fund
which typically involves the acquisition by the Fund of government 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 full 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 from the
counterparty and when reviewed added to maintain full collateralization. In the
event the original seller defaults on its obligations to repurchase, as a result
of its bankruptcy or otherwise, the Fund will seek to sell the collateral, which
action could involve costs or delays. In such case, the Fund's ability to
dispose of the collateral to recover its investment may be restricted or
delayed.
 
    The Fund will accrue interest from the institution until the time when the
repurchase is to occur. Although such date is deemed by the Fund to be the
maturity date of a repurchase agreement, the maturities of securities subject to
repurchase agreements are not subject to any limits and may exceed one year.
 
   
    While repurchase agreements involve certain risks not associated with direct
investments in debt securities, the Fund follows procedures designed to minimize
such risks. Repurchase agreements will be transacted only with large,
well-capitalized and well-established financial institutions whose financial
condition will be continuously monitored by the Investment Manager subject to
procedures established by the Trustees. The procedures also require that the
collateral underlying the agreement be specified. During the fiscal year ended
October 31, 1997, the Fund did not enter into repurchase agreements in an amount
greater than 5% of the Fund's net assets.
    
 
    WHEN-ISSUED AND DELAYED DELIVERY SECURITIES AND FORWARD COMMITMENTS.  As
discussed in the Prospectus, from time to time, in the ordinary course of
business, the Fund may purchase securities on a when-issued or delayed delivery
basis and may purchase or sell securities on a forward commitment basis. When
such transactions are negotiated, the price is fixed at the time of the
commitment, but delivery and payment can take place a month or more after the
date of the commitment. The securities so purchased are subject to market
fluctuation and no interest accrues to the purchaser during this period. While
the Fund will only purchase securities on a when-issued, delayed delivery or
forward commitment basis with the intention of acquiring the securities, the
Fund may sell the securities before the settlement date, if it is deemed
advisable. At the time the Fund makes the commitment to purchase securities on a
when-issued or delayed delivery basis, the Fund will record the transaction and
thereafter reflect the value, each day, of such security in determining the net
asset value of the Fund. At the time of delivery of the securities, the value
may be more or less than the purchase price. The Fund will also establish a
segregated account with the Fund's custodian bank in which it will continuously
maintain cash or U.S. Government securities or other liquid portfolio securities
equal in value to commitments for such when-issued or delayed delivery
securities; subject to this requirement, the Fund may purchase securities on
such basis without limit. An increase in the percentage of the Fund's assets
committed to
 
                                       21
<PAGE>
   
the purchase of securities on a when-issued or delayed delivery basis may
increase the volatility of the Fund's net asset value. During the fiscal year
ended October 31, 1997, the Fund did not purchase any such securities.
    
 
   
    WHEN, AS AND IF ISSUED SECURITIES.  As discussed in the Prospectus, the Fund
may purchase securities on a "when, as and if issued" basis under which the
issuance of the security depends upon the occurrence of a subsequent event, such
as approval of a merger, corporate reorganization, leveraged buyout or debt
restructuring. The commitment for the purchase of any such security will not be
recognized in the portfolio of the Fund until the Investment Manager determines
that issuance of the security is probable. At such time, the Fund will record
the transaction and, in determining its net asset value, will reflect the value
of the security daily. At such time, the Fund will also establish a segregated
account with its custodian bank in which it will continuously maintain cash or
U.S. Government securities or other liquid portfolio securities equal in value
to recognized commitments for such securities. Settlement of the trade will
occur within five business days of the occurrence of the subsequent event. The
value of the Fund's commitments to purchase the securities of any one issuer,
together with the value of all securities of such issuer owned by the Fund, may
not exceed 5% of the value of the Fund's total assets at the time the initial
commitment to purchase such securities is made (see "Investment Restrictions").
Subject to the foregoing restrictions, the Fund may purchase securities on such
basis without limit. An increase in the percentage of the Fund's assets
committed to the purchase of securities on a "when, as and if issued" basis may
increase the volatility of its net asset value. The Fund may also sell
securities on a "when, as and if issued" basis provided that the issuance of the
security will result automatically from the exchange or conversion of a security
owned by the Fund at the time of the sale. During the fiscal year ended October
31, 1997, the Fund did not purchase any when, as and if issued securities.
    
 
    LENDING OF PORTFOLIO SECURITIES.  Consistent with applicable regulatory
requirements, the Fund may lend its portfolio securities to brokers, dealers and
other financial institutions, provided that such loans are callable at any time
by the Fund (subject to notice provisions described below), and are at all times
secured by cash or appropriate high-grade debt obligations, which are maintained
in a segregated account pursuant to applicable regulations and that are at least
equal to the market value, determined daily, of the loaned securities. The
advantage of such loans is that the Fund continues to receive the income on the
loaned securities while at the same time earning interest on the cash amounts
deposited as collateral, which will be invested in short-term obligations. The
Fund will not lend its portfolio securities if such loans are not permitted by
the laws or regulations of any state in which its shares are qualified for sale
and will not lend more than 25% of the value of its total assets. A loan may be
terminated by the borrower on one business days' notice, or by the Fund on two
business days' notice. If the borrower fails to deliver the loaned securities
within two days after receipt of notice, the Fund could use the collateral to
replace the securities while holding the borrower liable for any excess of
replacement cost over collateral. As with any extensions of credit, there are
risks of delay in recovery and in some cases even loss of rights in the
collateral should the borrower of the securities fail financially. However,
these loans of portfolio securities will only be made to firms deemed by the
Fund's management to be creditworthy and when the income which can be earned
from such loans justifies the attendant risks. Upon termination of the loan, the
borrower is required to return the securities to the Fund. Any gain or loss in
the market price during the loan period would inure to the Fund. The
creditworthiness of firms to which the Fund lends its portfolio securities will
be monitored on an ongoing basis by the Investment Manager pursuant to
procedures adopted and reviewed, on an ongoing basis, by the 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. During the
fiscal year ended October 31, 1997, the Fund did not loan any of its portfolio
securities.
    
 
                                       22
<PAGE>
    WARRANTS.  The Fund may acquire warrants attached to other securities and,
in addition may invest up to 5% of the value of its total assets in warrants,
including up to 2% of such assets in warrants not listed on the New York or
American Stock Exchanges or a recognized foreign stock exchange. Warrants are,
in effect, an option to purchase equity securities at a specific price,
generally valid for a specific period of time, and have no voting rights, pay no
dividends and have no rights with respect to the corporation issuing them.
 
INVESTMENT RESTRICTIONS
- --------------------------------------------------------------------------------
 
    In addition to the investment restrictions enumerated in the Prospectus, the
investment restrictions listed below have been adopted by the Fund as
fundamental policies, except as otherwise indicated. Under the Act, a
fundamental policy may not be changed without the vote of a majority of the
outstanding voting securities of the Fund, as defined in the Act. Such a
majority is defined as the lesser of (a) 67% or more of the shares present at a
meeting of shareholders, if the holders of 50% of the outstanding shares of the
Fund are present or represented by proxy or (b) more than 50% of the outstanding
shares of the Fund.
 
    The Fund may not:
 
         1. Invest in securities of any issuer if, to the knowledge of the Fund,
    any officer or trustee of the Fund or any officer or director of the
    Investment Manager owns more than 1/2 of 1% of the outstanding securities of
    such issuer, and such officers, trustees and directors who own more than 1/2
    of 1% own in the aggregate more than 5% of the outstanding securities of
    such issuers.
 
         2. Purchase or sell real estate or interests therein, although the Fund
    may purchase securities of issuers which engage in real estate operations
    and securities secured by real estate or interests therein.
 
         3. Invest more than 10% of its total assets in "illiquid securities"
    (securities for which market quotations are not readily available) and
    repurchase agreements which have a maturity of longer than seven days. The
    staff of the Securities and Exchange Commission ("SEC") has taken the
    position that purchased OTC options and the assets used as "cover" for
    written OTC options are illiquid securities. The Investment Manager
    disagrees with this position. Nevertheless, the Fund has agreed to treat OTC
    options and the covering assets thereon as illiquid securities for purposes
    of this investment restriction.
 
         4. Purchase securities of other investment companies, except in
    connection with a merger, consolidation, reorganization or acquisition of
    assets or, by purchase in the open market of securities of closed-end
    investment companies where no underwriter's or dealer's commission or
    profit, other than customary broker's commissions, is involved and only if
    immediately thereafter not more than 10% of the Trust's total assets would
    be invested in such securities.
 
         5. Purchase or sell commodities or commodities contracts (other than
    precious metals or minerals commodities or contracts) provided however that
    the Fund may invest in futures and related options thereon.
 
         6. Purchase securities on margin, except for such short-term loans as
    are necessary for the clearance of portfolio securities. The deposit or
    payment by the Fund of initial or variation margin in connection with
    futures contracts or related options thereon is not considered the purchase
    of a security on margin.
 
         7. 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 any securities on a
    when-issued or delayed delivery basis; (c) purchasing or selling futures
    contracts, forward foreign exchange contracts or options; (d) borrowing
    money in accordance with restrictions described above; or (e) lending
    portfolio securities.
 
                                       23
<PAGE>
         8. Pledge its assets or assign or otherwise encumber them except to
    secure borrowings effected within the limitations set forth in restriction
    (6). For the purpose of this restriction, collateral arrangements with
    respect to the writing of options and collateral arrangements with respect
    to initial or variation margin for futures are not deemed to be pledges of
    assets.
 
         9. Make loans of money or securities; except: (a) by the purchase of
    publicly distributed debt obligations in which the Fund may invest
    consistent with its investment objectives and policies; (b) by investment in
    repurchase agreements; or (c) by lending its portfolio securities.
 
        10. Make short sales of securities.
 
        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.
 
        13. Invest in warrants (other than warrants acquired by the Fund as part
    of a unit or attached to securities at the time of purchase) if, as a
    result, the investments would exceed 5% of the value of the Fund's total
    assets of which not more than 2% of the Fund's total assets may be invested
    in warrants not listed on the New York or American Stock Exchange or a
    recognized foreign stock exchange.
 
    Notwithstanding any other investment policy or restriction, the Fund may
seek to achieve its investment objective by investing all or substantially all
of its assets in another investment company having substantially the same
investment objective and policies as the Fund.
 
    If a percentage restriction is adhered to at the time of investment, a later
increase or decrease in percentage resulting from a change in values of
portfolio securities or amount of total or net assets will not be considered a
violation of any of the foregoing restrictions.
 
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. The Fund expects that the primary market for the securities in
which it intends to invest will generally be the over-the-counter market. In the
over-the-counter market, securities are generally traded on a "net" basis with
dealers acting as principal for their own accounts without a stated commission,
although the price of the security usually includes a profit to the dealer. The
Fund expects that securities will be purchased at times in underwritten
offerings where the price includes a fixed amount of compensation, generally
referred to as the underwriter's concession or discount. Options and futures
transactions will usually be effected through a broker and a commission will be
charged. On occasion, the Fund may also purchase certain money market
instruments directly from an issuer, in which case no commissions or discounts
are paid. During the fiscal years ended October 31, 1997, October 31, 1996 and
October 31, 1995, the Fund paid $282,087, $227,064 and $145,843 in brokerage
commissions, respectively.
    
 
    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 are 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.
 
                                       24
<PAGE>
    The policy of the Fund regarding purchases and sales of securities for its
portfolio is that primary consideration will be given to obtaining the most
favorable prices and efficient executions of transactions. Consistent with this
policy, when securities transactions are effected on a stock exchange, the
Fund's policy is to pay commissions which are considered fair and reasonable
without necessarily determining that the lowest possible commissions are paid in
all circumstances. The Fund believes that a requirement always to seek the
lowest possible commission cost could impede effective portfolio management and
preclude the Fund and the Investment Manager from obtaining a high quality of
brokerage and research services. In seeking to determine the reasonableness of
brokerage commissions paid in any transaction, the Investment Manager relies
upon its experience and knowledge regarding commissions generally charged by
various brokers and on its judgment in evaluating the brokerage and research
services received from the broker effecting the transaction. Such determinations
are necessarily subjective and imprecise, as in most cases an exact dollar value
for those services is not ascertainable.
 
    The Fund anticipates that certain of its transactions involving foreign
securities will be effected on securities exchanges. Fixed commissions on such
transactions are generally higher than negotiated commissions on domestic
transactions. There is also generally less government supervision and regulation
of foreign securities exchanges and brokers than in the United States.
 
    In seeking to implement the Fund's policies, the Investment Manager effects
transactions with those brokers and dealers who the Investment Manager believes
provide the most favorable prices and are capable of providing efficient
executions. If the Investment Manager believes 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 investment; wire
services; and appraisals or evaluations of portfolio securities.
 
   
    The information and services received by the Investment Manager from brokers
and dealers may be of benefit to the Investment Manager in the management of
accounts of some of its other clients and may not in all cases benefit the Fund
directly. 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. During the fiscal year ended October 31, 1997 the Fund directed
the payment of $264,197 in brokerage commissions in connection with transactions
in the aggregate amount of $42,083,468 to brokers because of research services
provided.
    
 
    Pursuant to an order of the Securities and Exchange Commission, the Fund may
effect principal transactions in certain money market instruments with DWR. The
Fund will limit its transactions with DWR to U.S. Government and Government
Agency Securities, Bank Money Instruments (i.e., Certificates of Deposit and
Bankers' Acceptances) and Commercial Paper. Such transactions will be effected
with DWR only when the price available from DWR is better than that available
from other dealers.
 
   
    Consistent with the policy described above, brokerage transactions in
securities listed on exchanges or admitted to unlisted trading privileges may be
effected through DWR, Morgan Stanley and Co. Inc. and other affiliated brokers
or dealers. 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
    
 
                                       25
<PAGE>
   
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 the amount of
brokerage commissions it may pay to an affiliated broker or dealer. During the
fiscal years ended October 31, 1997, October 31, 1996 and October 31, 1995, the
Fund paid a total of $750, $30,640 and $22,154, respectively, in brokerage
commissions to DWR. During the fiscal year ended October 31, 1997 the brokerage
commissions paid to DWR represented approximately 0.27% of the total brokerage
commissions paid by the Fund during the year and were paid on account of
transactions having an aggregate dollar value equal to approximately 1.18% of
the aggregate dollar value of all portfolio transactions of the Fund during the
year for which commissions were paid. During the period June 1 through October
31, 1997, the Fund paid no brokerage commissions to Morgan Stanley & Co., Inc.,
which broker-dealer became an affiliate of the Investment Manager on May 31,
1997 upon consummation of the merger of Dean Witter, Discover & Co. with Morgan
Stanley Group Inc.
    
 
   
    During the fiscal year ended October 31, 1997, the Fund did not acquire any
securities of the ten brokers who executed the largest dollar amounts of the
Fund's portfolio transactions or of the ten dealers who executed the largest
dollar amounts of principal transactions with the Fund during the period, or
securities of the parents of those broker-dealers.
    
 
PORTFOLIO TRADING
 
   
    It is anticipated that the Fund's portfolio turnover rate will not exceed
100% in any one year. 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. During the fiscal years ended October 31, 1997 and October 31, 1996,
the Fund's portfolio turnover rates were 53% and 46%, respectively.
    
 
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 MSDWD. The Trustees of the
Fund, including a majority of the Trustees who are not, and were not at the time
they voted, interested persons of the Fund, as defined in the Act (the
"Independent Trustees"), approved, at their meeting held on June 30, 1997, the
current Distribution 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 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 to prospective Shareholders. 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
misfea-
 
                                       26
<PAGE>
sance, 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 following
annual rates: 0.25% and 1.0% of the average daily net assets of Class A and
Class C, respectively, and, with respect to Class B, 1.0% of the lesser of: (a)
the average daily aggregate gross sales of the Fund's Class B shares since the
inception of the Fund (not including reinvestments of dividends or capital gains
distributions), less the average daily aggregate net asset value of the Fund's
Class B shares redeemed since the Fund's inception upon which a contingent
deferred sales charge has been imposed or upon which such charge has been
waived; or (b) the average daily net assets of Class B. The Distributor also
receives the proceeds of front-end sales charges and of contingent deferred
sales charges imposed on certain redemptions of shares, which are separate and
apart from payments made pursuant to the Plan (see "Purchase of Fund Shares" in
the Prospectus). The Distributor has informed the Fund that it and/or DWR
received (a) approximately $234,131, $163,116 and $168,786 in contingent
deferred sales charges from Class B for the fiscal years ended October 31, 1995,
1996 and 1997, respectively, (b) $0 and approximately $270 in contingent
deferred sales charges from Class A and Class C, respectively, for the fiscal
year ended October 31, 1997, and (c) $0 in front-end sales charges from Class A
for the fiscal year ended October 31, 1997, 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 February 15,
1990, and on April 12, 1990, 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 DWR 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. DWR, as the then sole shareholder of the Fund,
approved the Plan on June 7, 1990, whereupon the Plan went into effect.The
shareholders of the Fund, holding a majority, as defined in the Act, of the
outstanding voting securities of the Fund, approved the Plan at a Special
Meeting of Shareholders held on September 20, 1991.
 
    Under its terms, the Plan had an initial term ending April 30, 1991 and
provides that it 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. Prior to the Board's approval of amendments to the Plan to
reflect the multiple class structure for the Fund, the most recent continuance
of the Plan for one year, until April 30, 1998, was approved by the Board of
Trustees of the Fund, including a majority of the Independent 12b-1 Trustees on
April 24, 1997. Prior to approving the continuation of the Plan, the Trustees
requested and received from the Distributor and reviewed all the information
which they deemed necessary to arrive at an informed determination. In making
their determination to continue the Plan, the Trustees considered: (1) the
Fund's experience under the Plan and whether such experience indicates that the
Plan is operating as anticipated; (2) the benefits the Fund had obtained, was
obtained and would be likely to obtain under the Plan; and (3) what services had
been provided and were continuing to be
 
                                       27
<PAGE>
provided under the Plan to the Fund and its shareholders. Based upon their
review, the Trustees of the Fund, including each of the Independent 12b-1
Trustees, determined that continuation of the Plan would be in the best interest
of the Fund and would have a reasonable likelihood of continuing to benefit the
Fund and its shareholders. In the Trustee's quarterly review of the Plan, they
will consider its continued appropriateness and the level of compensation
provided herein.
 
    At their meeting held on October 30, 1992, the Trustees of the Fund,
including all of the Independent 12b-1 Trustees, approved certain amendments to
the Plan which took effect in January, 1993 and were designed to reflect the
fact that upon an internal reorganization described above the share distribution
activities theretofore performed for the Fund by DWR were assumed by the
Distributor and DWR's sales activities are now being performed pursuant to the
terms of a selected dealer agreement between the Distributor and DWR. The
amendments provide that payments under the Plan will be made to the Distributor
rather than to DWR as before the amendment, and that the Distributor in turn is
authorized to make payments to DWR, its affiliates or other selected
broker-dealers (or direct that the Fund pay such entities directly). The
Distributor is also authorized to retain part of such fee as compensation for
its own distribution-related expenses. At their meeting held on April 28, 1993,
the Trustees, including a majority of the Independent 12b-1 Trustees, also
approved certain technical amendments to the Plan in connection with recent
amendments adopted by the National Association of Securities Dealers, Inc. to
its Rules of the Association. At their meeting held on October 26, 1995, the
Trustees of the Fund, including all of the Independent 12b-1 Trustees, approved
an amendment to the Plan to permit payments to be made under the Plan with
respect to certain distribution expenses incurred in connection with the
distribution of shares, including personal services to shareholders with respect
to holdings of such shares, of an investment company whose assets are acquired
by the Fund in a tax-free reorganization. At their meeting held on June 30,
1997, the Trustees, including a majority of the Independent 12b-1 Trustees,
approved amendments to the Plan to reflect the multiple-class structure for the
Fund, which took effect on July 28, 1997.
 
   
    Pursuant to the Plan and as required by Rule 12b-1, the Trustees receive and
review promptly after the end of each calendar quarter a written report provided
by the Distributor of the amounts expended under the Plan and the purpose for
which such expenditures were made. Class B shares of the Fund accrued amounts
payable to the Distributor under the Plan, during the fiscal year ended October
31, 1997, of $510,120. This amount is equal to payments required to be paid
monthly by the Fund which were computed at the annual rate of 1.0% of the
average daily net assets of Class B and was calculated pursuant to clause (b) of
the compensation formula under the Plan. For the fiscal period July 28 through
October 31, 1997, Class A and Class C shares of the Fund accrued payments under
the Plan amounting to $14 and $938, respectively, which amounts are equal to
0.25% and 1.00% of the average daily net assets of Class A and Class C,
respectively, for such period.
    
 
    The Plan was adopted in order to permit the implementation of the Fund's
method of distribution. Under this distribution method the Fund offers four
Classes of shares, each with a different distribution arrangement as set forth
in the Prospectus.
 
   
    With respect to Class A shares, DWR compensates its 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 Dean Witter Trust FSB ("DWT") 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.
    
 
                                       28
<PAGE>
   
    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 (not including reinvested
dividends or distributions) of the amount sold in all cases. In the case of
Class B shares purchased on or after July 28, 1997 by Qualified Retirement Plans
for which DWT 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 or dealers of
record.
 
    With respect to Class D shares other than shares held by participants in
InterCapital's 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 DWR's Fund-associated distribution-related expenses,
including sales compensation, and overhead and other branch office
distribution-related expenses including (a) the expenses of operating DWR's
branch offices in connection with the sale of Fund shares, including lease
costs, the salaries and employee benefits of operations and sales support
personnel, utility costs, communications costs and the costs of stationery and
supplies, (b) the costs of client sales seminars, (c) travel expenses of mutual
fund sales coordinators to promote the sale of Fund shares and (d) other
expenses relating to branch promotion of Fund sales. The distribution fee that
the Distributor receives from the Fund under the Plan, in effect, offsets
distribution expenses incurred under the Plan on behalf of the Fund and, in the
case of Class B shares, opportunity costs, such as the gross sales credit and an
assumed interest charge thereon ("carrying charge"). In the Distributor's
reporting of the distribution expenses to the Fund, in the case of Class B
shares, such assumed interest (computed at the "broker's call rate") has been
calculated on the gross credit as it is reduced by amounts received by the
Distributor under the Plan and any contingent deferred sales charges received by
the Distributor upon redemption of shares of the Fund. No other interest charge
is included as a distribution expense in the Distributor's calculation of its
distribution costs for this purpose. The broker's call rate is the interest rate
charged to securities brokers on loans secured by exchange-listed securities.
    
 
    The Fund is authorized to reimburse expenses incurred or to be incurred in
promoting the distribution of the Fund's Class A and Class C shares and in
servicing shareholder accounts. Reimbursement will be made through payments at
the end of each month. The amount of each monthly payment may in no event exceed
an amount equal to a payment at the annual rate of 0.25%, in the case of Class
A, and 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
 
                                       29
<PAGE>
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.
 
   
    Each Class paid 100% of the amounts accrued under the Plan with respect to
that class for the fiscal year ended October 31, 1997 to the Distributor. The
Distributor and DWR estimate that they have spent, pursuant to the Plan,
$7,421,455 on behalf of Class B since the inception of the Fund. It is estimated
that this amount was spent in approximately the following ways; (i) 24.87%
($1,845,548)--advertising and promotional expenses; (ii) 2.02%
($150,216)--printing of prospectuses for distribution to other than current
shareholders; and (iii) 73.11% ($5,425,691)--other expenses, including the gross
sales credit and the carrying charge, of which 6.96% ($377,763) represents
carrying charges, 37.33% ($2,025,229) represents commission credits to DWR
branch offices for payments of commissions to account executives and 55.71%
($3,022,699) represents overhead and other branch office distribution-related
expenses. The amounts accrued by Class A and Class C for distribution during the
fiscal period July 28 through October 31, 1997 were for expenses which relate to
compensation of sales personnel and associated overhead expenses.
    
 
   
    In the case of Class B shares, at any given time, the expenses of
distributing shares of the Fund may be more or less than the total of (i) the
payments made by the Fund pursuant to the Plan and (ii) the proceeds of
contingent deferred sales charges paid by investors upon redemption of shares.
The Distributor has advised the Fund that in the case of Class B shares, the
excess distribution expenses, including the carrying charge designed to
approximate the opportunity costs incurred by DWR which arise from it having
advanced monies without having received the amount of any sales charges imposed
at the time of the sale of Fund's Class B shares, totalled $3,486,664 as of
October 31, 1997. Because there is no requirement under the Plan that the
Distributor be reimbursed for all distribution expenses with respect to Class B
shares or any requirement that the Plan be continued from year to year, this
excess amount does not constitute a liability of the Fund. Although there is no
legal obligation for the Fund to pay expenses incurred in excess of payments
made to the Distributor under the Plan and the proceeds of 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, 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 or Classes of the Fund, and all material amendments of the Plan
must also be approved by the Trustees in the manner described above. The Plan
may be terminated at any time, without payment of any penalty, by vote of a
majority of the Independent 12b-1 Trustees or by a vote of a majority of the
outstanding voting securities of the Fund (as defined in the Act) on not more
than thirty days' written notice to any other party to the Plan. So long as the
Plan is in effect, the election and nomination of Independent Trustees shall be
committed to the discretion of the Independent Trustees.
 
                                       30
<PAGE>
DETERMINATION OF NET ASSET VALUE
- --------------------------------------------------------------------------------
 
    The net asset value per share for each Class of shares of the Fund is
determined once daily at 4:00 p.m., New York time (or, on days when the New York
Stock Exchange closes prior to 4:00 p.m., at such earlier time) (which
corresponds to the closing time on various options exchanges) on each day that
the New York Stock Exchange is open by taking the net assets of the Fund,
dividing by the number of shares outstanding and adjusting to the nearest cent.
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.
 
    Short-term debt securities with remaining maturities of 60 days or less to
maturity at the time of purchase are valued at amortized cost, unless the
Trustees determine such does not reflect the securities' market value, in which
case these securities will be valued at their fair value as determined by the
Trustees. Other short-term debt securities will be valued on a mark to market
basis until such time as they reach a remaining maturity of 60 days, whereupon
they will be valued at amortized cost using their value on the 61st day unless
the Trustees determine such does not reflect the securities' fair value, in
which case these securities will be valued at their fair value as determined by
the Trustees. Options are valued at the mean between their latest bid and asked
prices. Futures are valued at the last sale price as of the close of the
commodities exchange on which they trade unless the Trustees determine that such
price does not reflect their market value, in which case they will be valued at
their fair value as determined by the Trustees. All other securities and other
assets are valued at their fair value as determined in good faith under
procedures established by and under the supervision of the Trustees.
 
    Generally, trading in foreign securities, as well as corporate bonds, United
States government securities and money market instruments, is substantially
completed each day at various times prior to 4:00 p.m., New York time. The
values of such securities used in computing the net asset value of the Fund's
shares are determined as of such times. Foreign currency exchange rates are also
generally determined prior to 4:00 p.m., New York time. Occasionally, events
which affect the values of such securities and such exchange rates may occur
between the times at which they are determined and 4:00 p.m., New York time, and
will therefore not be reflected in the computation of the Fund's net asset
value. If events materially affecting the value of such securities occur during
such period, then these securities will be valued at their fair value as
determined in good faith under procedures established by and under the
supervision of the Trustees.
 
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
 
                                       31
<PAGE>
   
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 Dean
Witter Trust FSB (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.
 
    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 employer-sponsored benefit 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
employer-sponsored benefit 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--
 
                                       32
<PAGE>
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
employer-sponsored benefit 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 OF
                                       PAYMENT MADE                                              AMOUNT REDEEMED
- ------------------------------------------------------------------------------------------  --------------------------
<S>                                                                                         <C>
First.....................................................................................               5.0%
Second....................................................................................               4.0%
Third.....................................................................................               3.0%
Fourth....................................................................................               2.0%
Fifth.....................................................................................               2.0%
Sixth.....................................................................................               1.0%
Seventh and thereafter....................................................................             None
</TABLE>
 
   
    The following table sets forth the rates of the CDSC applicable to Class B
shares of the Fund purchased on or after July 28, 1997 by Qualified Retirement
Plans for which DWT serves as Trustee or DWR's Retirement Plan Services serves
as recordkeeper pursuant to a written Recordkeeping Services
Agreement:
    
 
<TABLE>
<CAPTION>
                                        YEAR SINCE
                                         PURCHASE                                            CDSC AS A PERCENTAGE OF
                                       PAYMENT MADE                                              AMOUNT REDEEMED
- ------------------------------------------------------------------------------------------  --------------------------
<S>                                                                                         <C>
First.....................................................................................               2.0%
Second....................................................................................               2.0%
Third.....................................................................................               1.0%
Fourth and thereafter.....................................................................             None
</TABLE>
 
    In determining the rate of the CDSC, it will be assumed that a redemption is
made of shares held by the investor for the longest period of time within the
applicable six-year or three-year period. This will result in any such CDSC
being imposed at the lowest possible rate. The CDSC will be imposed, in
 
                                       33
<PAGE>
   
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 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.
    
 
    TARGETED DIVIDENDS.-SM-  In states where it is legally permissible,
shareholders may also have all income dividends and capital gains distributions
automatically invested in shares of any Class of an open-end Dean Witter Fund
other than Dean Witter Precious Metals and Minerals Trust or in another Class of
Dean Witter Precious Metals and Minerals Trust. 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.
 
                                       34
<PAGE>
   
    EASYINVEST.-SM-  Shareholders may subscribe to EasyInvest, an automatic
purchase plan which provides for any amount from $100 to $5,000 to be
transferred automatically from a checking or savings account or following
redemption of shares of a 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.  Any shareholder
who receives a cash payment representing a dividend or distribution may invest
such dividend or distribution in shares of the applicable Class at the net asset
value per share, 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 withdrawal
plan (the "Withdrawal Plan") is available for shareholders who own or purchase
shares of the Fund having a minimum value of $10,000 based upon the then current
net asset value. The Withdrawal Plan provides for monthly or quarterly (March,
June, September and December) checks in any dollar amount, not less than $25, or
in any whole percentage of the account balance, on an annualized basis. Any
applicable CDSC will be imposed on shares redeemed under the Withdrawal Plan
(see "Purchase of Fund Shares"). Therefore, any shareholder participating in the
Withdrawal Plan will have sufficient shares redeemed from his or her account so
that the proceeds (net of any applicable CDSC) to the shareholder will be the
designated monthly or quarterly amount.
 
    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 or other
selected broker-dealer 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 shareholder's original investment will be
correspondingly reduced and ultimately exhausted.
 
    Each withdrawal constitutes a redemption of shares and any gain or loss
realized must be recognized for federal income tax purposes. Although the
shareholder may make additional investments of $2,500 or more under the
Withdrawal Plan, withdrawals made concurrently with purchases of additional
shares may be inadvisable because of 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
 
                                       35
<PAGE>
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.
 
    DIRECT INVESTMENTS THROUGH TRANSFER AGENT.  As discussed in the Prospectus,
a shareholder 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 Precious Metals and Minerals Trust 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 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 shares 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 collectively 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 30 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 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 of the Fund exchanged into
an Exchange Fund, upon a redemption of shares which results in a CDSC being
imposed, a credit (not to exceed the amount of the CDSC) will be given in an
amount equal to the Exchange Fund 12b-1 distribution fees incurred on or after
that date which are attributable to those shares. Shareholders acquiring shares
of an Exchange Fund pursuant to this exchange privilege may
    
 
                                       36
<PAGE>
   
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 of 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 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.
 
                                       37
<PAGE>
    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 and 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 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 this 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 Fund's Exchange Privilege,
shareholders should contact their DWR or other selected broker-dealer account
executive or the Transfer Agent.
 
REDEMPTIONS AND REPURCHASES
- --------------------------------------------------------------------------------
 
   
    REDEMPTION.  As stated in the Prospectus, shares of each Class of the Fund
can be redeemed for cash at any time at the net asset value per share next
determined; however, such redemption proceeds will be reduced by the amount of
any applicable CDSC. If shares are held in a shareholder's account without a
share certificate, a written request for redemption to the Fund's Transfer Agent
at P.O. Box 983, Jersey City, NJ 07303 is required. If certificates are held by
the shareholder, the shares may be redeemed by surrendering the certificates
with a written request for redemption. The share certificate, or an accompanying
stock power, and the request for redemption must be signed by the shareholder or
shareholders exactly as the shares are registered. Each request for redemption,
whether or not accompanied by 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" in the Prospectus) after it receives the
request, and certificate, if any, in good order. The term good order means that
the share certificate, if any, and request for redemption are properly signed,
accompanied by any documentation required by the Transfer Agent, and bear
signature guarantees when required by the Fund or the Transfer Agent. Any
redemption request received after such computation will be redeemed at the next
determined net asset value.
    
 
    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
 
                                       38
<PAGE>
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 new prospectus.
 
    REPURCHASE.  As stated in the Prospectus, DWR and other selected
broker-dealers are authorized to repurchase shares represented by a share
certificate which is delivered to any of their offices. Shares held in a
shareholder's account without a share certificate may also be repurchased by DWR
and other selected broker-dealers upon the telephonic request of the
shareholder. The repurchase price is the net asset value next computed after
such purchase order is received by DWR or other selected broker-dealer reduced
by any applicable CDSC.
 
   
    PAYMENT FOR SHARES REDEEMED OR REPURCHASED.  As discussed in the Prospectus,
payment for shares of any Class presented for repurchase or redemption will be
made by check within seven days after receipt by the Transfer Agent of the
certificate and/or written request in good order. Such payment 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 (including a certificate or bank cashier's
check), payment of 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
dividends or distributions paid in cash 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 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 after the date of
redemption or repurchase, reinstate any portion of 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 such
proceeds, is received by the Transfer Agent.
    
 
    Exercise of the reinstatement privilege will not affect the federal 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 purposes,
but will be applied to adjust the cost basis of the shares acquired upon
reinstatement.
 
                                       39
<PAGE>
DIVIDENDS, DISTRIBUTIONS AND TAXES
- --------------------------------------------------------------------------------
 
    As discussed in the Prospectus, the Fund will determine either to distribute
or to retain all or part of any net long-term capital gains in any year for
reinvestment. If any such gains are retained, the Fund will pay federal income
tax thereon, and will notify shareholders that, following an election by the
Fund, the shareholders will be required to include such undistributed gains in
their taxable income and will be able to claim their share of the tax paid by
the Fund as a credit against their individual federal income tax.
 
   
    The Fund has qualified and intends to remain qualified as a regulated
investment company under Subchapter M of the Internal Revenue Code of 1986 (the
"Code"). If so qualified, the Fund will not be subject to federal income tax on
its net investment income and capital gains, if any, realized during any fiscal
year to the extent that it distributes such income and capital gains to its
shareholders.
    
 
   
    Gains or losses on sales of securities by the Fund will be long-term capital
gains or losses if the securities have been held by the Fund for more than one
year. Gains or losses on the sale of securities held for one year or less will
be short-term capital gains or losses. Treasury intends to issue regulations to
permit shareholders to take into account their proportionate share of the Fund's
capital gains distributions that will be subject to a reduced rate under the
Taxpayer Relief Act of 1997. The Taxpayer Relief Act reduced the maximum tax on
long-term capital gains from 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%.
    
 
    Any dividend or capital gains distribution received by a shareholder from
any investment company will have the effect of reducing the net asset value of
the shareholder's stock in that company by the exact amount of the dividend or
capital gains distribution. Furthermore, capital gains distributions and
dividends are subject to federal income taxes. If the net asset value of the
shares should be reduced below a shareholder's cost as a result of the payment
of dividends or the distribution of realized long-term capital gains, such
payment or distribution would be in part a return of the shareholder's
investment to the extent of such reduction below the shareholder's cost, but
nonetheless would be taxable to the shareholder. Therefore, an investor should
consider the tax implications of purchasing Fund shares immediately prior to a
dividend or distribution record date.
 
   
    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.
    
 
   
    Dividends, interest and capital gains received by the Fund may give rise to
withholding and other taxes imposed by foreign countries. Tax conventions
between certain countries and the United States may reduce or eliminate such
taxes. Investors may be entitled to claim United States foreign tax credits with
respect to such taxes, subject to certain provisions and limitations contained
in the Code. If more than 50% of the Fund's total assets at the close of its
fiscal year consist of securities of foreign corporations, the Fund will be
eligible to file an election with the Internal Revenue Service pursuant to which
shareholders of the Fund will be required to include their respective pro rata
portions of such withholding taxes in their United States income tax returns as
gross income, treat such respective pro rata portions as taxes paid by them, and
deduct such respective pro rata portions in computing their taxable incomes or,
alternatively, use them as foreign tax credits against their United States
income taxes. The Fund will report annually to its shareholders the amount per
share of such withholding. The
    
 
                                       40
<PAGE>
   
Taxpayer Relief Act of 1997 mandates a holding period requirement for claiming a
foreign tax credit with respect to dividends. The foreign tax credit normally
available with respect to a dividend from a corporation (or a Fund that has made
an election under Section 853), is disallowed if the shareholder has not held
the stock for, in general, 16 days in the case of common stock (46 days in the
case of preferred stock) during the 30-day (90-day) period beginning 15 days (45
days) before the ex-date of the dividend with respect to which the foreign tax
is paid. The holding period requirement applies to shareholders of the Fund as
well as the Fund itself.
    
 
   
    If the Fund invests in an entity which is classified as a "passive foreign
investment company" ("PFIC") for U.S. tax purposes, the application of certain
technical tax provisions applying to such companies could result in the
imposition of federal income tax with respect to such investments at the Fund
level which could not be eliminated by distributions to shareholders. The
Taxpayer Relief Act of 1997 established a mark-to-market regime which allows
investment companies investing in PFICs to avoid most, if not all, of the
difficulties posed by the PFIC rules. In any event it is not anticipated that
any taxes on the Fund with respect to investments in PFICs would be significant.
    
 
    SPECIAL RULES FOR CERTAIN FOREIGN CURRENCY TRANSACTIONS.  In general, gains
from "foreign currencies" and from foreign currency options, foreign currency
futures and forward foreign exchange contracts relating to investments in stock,
securities or foreign currencies will be qualifying income for purposes of
determining whether the Fund qualifies as a regulated investment company. It is
currently unclear, however, who will be treated as the issuer of a foreign
currency instrument or how foreign currency options, futures, or forward foreign
currency contracts will be valued for purposes of the regulated investment
company diversification requirements applicable to the Fund. The Fund may
request a private letter ruling from the Internal Revenue Service on some or all
of these issues.
 
    Under Code Section 988, special rules are provided for certain transactions
in a foreign currency other than the taxpayer's functional currency (I.E.,
unless certain special rules apply, currencies other than the U.S. dollar). In
general, foreign currency gains or losses from forward contracts, from futures
contracts that are not "regulated futures contracts", and from unlisted options
will be treated as ordinary income or loss under Code Section 988. Also, certain
foreign exchange gains derived with respect to foreign fixed-income securities
are also subject to Section 988 treatment. In general, Code Section 988 gains or
losses will increase or decrease the amount of the Fund's investment company
taxable income available to be distributed to shareholders as ordinary income,
rather than increasing or decreasing the amount of the Fund's net capital gain.
Additionally, if Code Section 988 losses exceed other investment company taxable
income during a taxable year, the Fund would not be able to make any ordinary
dividend distributions.
 
    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. The ending redeemable value is reduced by any CDSC at the
end of the one, five or ten year or other period. For the purpose of this
calculation, it is assumed that all dividends and distributions are reinvested.
The formula for computing the average annual total return involves a percentage
obtained by dividing the ending redeemable value by the amount of the initial
investment, taking a root of the quotient (where the root is equivalent to the
number of years in the period) and subtracting 1 from the result. The average
annual total returns of Class B for the fiscal year ended
    
 
                                       41
<PAGE>
   
October 31, 1997, for the five years ended October 31, 1997, and for the period
August 6, 1990 (commencement of operations) through October 31, 1997 were
- -36.36%, -0.70% and -3.29%, respectively.
    
 
   
    For periods of less than one year, the Fund quotes its total return on a
non-annualized basis. Accordingly, the Fund may compute its aggregate total
return for each of Class A, Class C and Class D for specified periods by
determining the aggregate percentage rate which will result in the ending value
of a hypothetical $1,000 investment made at the beginning of the period. For the
purpose of this calculation, it is assumed that all dividends and distributions
are reinvested. The formula for computing aggregate total return involves a
percentage obtained by dividing the ending value by the initial $1,000
investment and subtracting 1 from the result. The ending redeemable value is
reduced by any CDSC at the end of the period. Based on the foregoing
calculations, the total returns for the period July 28, 1997 through October 31,
1997 were -18.24%, -14.82% and -13.71% for Class A, Class C and Class D,
respectively.
    
 
   
    In addition to the foregoing, the Fund may advertise its total return for
each Class over different periods of time by means of aggregate, average,
year-by-year or other types of total return figures. Such calculations may or
may not reflect the imposition of the maximum front-end sales charge for Class A
or the deduction of the CDSC for each of Class B and Class C which, if
reflected, would reduce the performance quoted. For example, the average annual
total return of the Fund may be calculated in the manner described above, but
without deduction for any applicable sales charge. Based on this calculation,
the average annual total returns of Class B for the fiscal year ended October
31, 1997, for the five years ended October 31, 1997, and for the period August
6, 1990 through October 31, 1997 were -33.29%, -0.34% and -3.29%, respectively.
    
 
   
    In addition, the Fund may compute its aggregate total return for each Class
for specified periods by determining the aggregate percentage rate which will
result in the ending value of a hypothetical $1,000 investment made at the
beginning of the period. For the purpose of this calculation, it is assumed that
all dividends and distributions are reinvested. The formula for computing
aggregate total return involves a percentage obtained by dividing the ending
value (without the reduction for any sales charge) by the initial $1,000
investment and subtracting 1 from the result. Based on the foregoing calculation
the total returns for Class B for the fiscal year ended October 31, 1997, for
the five years ended October 31, 1997 and for the period August 6, 1990 through
October 31, 1997 were -33.29%, -1.70% and -21.52%, respectively. Based on the
foregoing calculations, the total returns for Class A, Class C and Class D for
the period July 28 through October 31, 1997 were -13.71%, -13.96% and -13.71%,
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 or $100,000 in the case of each of Class B, Class C and Class D, as the
case may be. Investments of $10,000, $50,000 and $100,000 in each Class at
inception of the Class would have declined to the following amounts at October
31, 1997:
    
 
   
<TABLE>
<CAPTION>
                                          INVESTMENT AT INCEPTION OF:
                                        -------------------------------
        CLASS          INCEPTION DATE:   $10,000    $50,000   $100,000
- ---------------------  ---------------  ---------  ---------  ---------
<S>                    <C>              <C>        <C>        <C>
Class A..............       7/28/97     $   8,176  $  41,419  $  83,701
Class B..............       8/06/90         7,848     39,240     78,480
Class C..............       7/28/97         8,604     43,020     86,040
Class D..............       7/28/97         8,629     43,145     86,290
</TABLE>
    
 
    The Fund from time to time may also advertise its performance relative to
certain performance rankings and indexes compiled by independent organizations.
 
                                       42
<PAGE>
DESCRIPTION OF SHARES OF THE FUND
- --------------------------------------------------------------------------------
 
   
    The shareholders of the Fund are entitled to a full vote for each full share
held. All of the Trustees have been elected by the shareholders of the Fund,
most recently at a Special Meeting of Shareholders held on May 21, 1997. The
Trustees themselves have the power to alter the number and the terms of office
of the Trustees, and they may at any time lengthen their own terms or make their
terms of unlimited duration and appoint their own successors, provided that
always at least a majority of the Trustees has been elected by the shareholders
of the Fund. Under certain circumstances the Trustees may be removed by action
of the Trustees. The shareholders 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.
 
    The Declaration of Trust provides that no Trustee, officer, employee or
agent of the Fund is liable to the Fund or to a shareholder, nor is any Trustee,
officer, employee or agent liable to any third persons in connection with the
affairs of the Fund, except as such liability may arise from his/her or its own
bad faith, willful misfeasance, gross negligence, or reckless disregard of his
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 above, 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 Trust shall be of unlimited duration subject to the provisions in the
Declaration of Trust concerning termination by action of the shareholders.
 
CUSTODIAN AND TRANSFER AGENT
- --------------------------------------------------------------------------------
 
    The Bank of New York, 90 Washington Street, New York, New York 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.
 
   
    Dean Witter Trust FSB, 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. Dean
Witter Trust FSB 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, Dean Witter Trust FSB'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 Dean Witter Trust
FSB receives a per shareholder account fee from the Fund.
    
 
    Wilmington Trust Company, Rodney Square North, Wilmington, Delaware 19890
acts as Sub-Custodian for the storing, transferring and delivering of the
precious metals owned by 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.
 
                                       43
<PAGE>
REPORTS TO SHAREHOLDERS
- --------------------------------------------------------------------------------
 
    The Fund will send to shareholders, at least semi-annually, reports showing
the Fund's portfolio and other information. An annual report containing
financial statements audited by independent accountants will be sent to
shareholders each year.
 
    Fund's fiscal year ends on October 31. The financial statements of the Fund
must be audited at least once a year by independent accountants whose selection
is made annually by the Fund's Board of Trustees.
 
LEGAL COUNSEL
- --------------------------------------------------------------------------------
 
    Barry Fink, Esq., who is an officer and the General Counsel of the
Investment Manager, is an officer and the General Counsel of the Fund.
 
EXPERTS
- --------------------------------------------------------------------------------
 
   
    The financial statements of the Fund for the fiscal year ended October 31,
1997 included in this Statement of Additional Information and incorporated by
reference in the Prospectus have been so included and incorporated in reliance
on the report of 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.
 
                                       44
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
PORTFOLIO OF INVESTMENTS OCTOBER 31, 1997
    
   
<TABLE>
<CAPTION>
NUMBER OF
  SHARES                                                      VALUE
- ----------------------------------------------------------------------
<C>         <S>                                            <C>
            COMMON STOCKS (94.8%)
            AUSTRALIA (10.3%)
            COMMERCIAL SERVICES
  125,000   Henry Walker Group Ltd.......................  $   188,367
                                                           -----------
            GOLD MINING
  350,000   Acacia Resources Ltd.*.......................      348,347
  300,000   Delta Gold*..................................      252,324
   25,000   Lihir Gold Ltd. (ADR)*.......................      662,500
1,100,000   Normandy Mining Ltd..........................    1,195,035
  150,000   Rangers Minerals NL..........................      352,202
  125,375   Western Mining Corp. Holdings Ltd.*..........      443,770
                                                           -----------
                                                             3,254,178
                                                           -----------
            METALS & MINING
  200,000   North Ltd....................................      522,591
                                                           -----------
 
            TOTAL AUSTRALIA..............................    3,965,136
                                                           -----------
            CANADA (43.2%)
            DIAMONDS
   95,000   Aber Resources Ltd.*.........................    1,119,710
                                                           -----------
            GOLD
  135,000   Euro-Nevada Mining Corp......................    2,051,264
   50,000   Franco Nevada Mining Co......................    1,155,567
  150,000   Romarco Minerals, Inc........................      479,267
                                                           -----------
                                                             3,686,098
                                                           -----------
            GOLD MINING
   80,000   Barrick Gold Corp. (ADR).....................    1,645,000
  185,000   Bema Gold Corp.*.............................      591,096
  115,000   Cambior, Inc. (ADR)..........................      905,625
  350,000   Geomaque Explorations Ltd.*..................      683,400
   20,000   Goldcorp, Inc.*..............................      110,054
  130,000   Goldcorp, Inc. (ADR)*........................      715,000
  122,000   Greenstone Resources Ltd.*...................      996,166
  400,000   Indomin Resources Ltd........................      227,208
   90,000   Kinross Gold Corp............................      377,024
   80,000   Placer Dome, Inc. (ADR)......................    1,240,000
   50,000   Prime Resources Group, Inc...................      333,712
  125,000   Prime Resources Group, Inc. (ADR)*...........      834,280
  125,000   Repadre Capital Corp.*.......................      621,272
  100,000   Sutton Resources Ltd.*.......................      717,126
    5,000   Teck Corp. (B Shares)........................       86,978
   50,000   Teck Corp. (B Shares) (ADR)..................      869,782
  550,000   Vengold Inc.*................................      702,925
  200,000   Yamana Resources, Inc.*......................      150,525
                                                           -----------
                                                            11,807,173
                                                           -----------
 
            TOTAL CANADA.................................   16,612,981
                                                           -----------
 
<CAPTION>
NUMBER OF
  SHARES                                                      VALUE
- ----------------------------------------------------------------------
<C>         <S>                                            <C>
 
            PERU (2.8%)
            GOLD
   60,000   Compania de Minas Buenaventura S.A. (ADR)*...  $ 1,076,250
                                                           -----------
 
            UNITED KINGDOM (3.9%)
            GOLD MINING
   50,000   Randgold Resources, Ltd. (GDR)* - 144A**.....      475,000
                                                           -----------
            METALS & MINING
   20,000   Rio Tinto PLC (ADR)..........................    1,040,000
                                                           -----------
 
            TOTAL UNITED KINGDOM.........................    1,515,000
                                                           -----------
 
            UNITED STATES (34.6%)
            DIAMONDS
   50,000   Lazare Kaplan International, Inc.............      762,500
                                                           -----------
            GOLD MINING
   40,000   Battle Mountain Gold Co......................      245,000
   15,000   Bema Gold Corp.*.............................       47,812
  225,000   Canyon Resources Corp.*......................      379,688
  100,000   Crown Resource Corp.*........................      525,000
   80,000   Freeport-McMoran Copper & Gold, Inc. (Class
              A).........................................    1,845,000
   65,000   Getchell Gold Corp.*.........................    2,340,000
  120,000   Homestake Mining Co..........................    1,485,000
  200,000   Meridian Gold Inc.*..........................      812,500
   25,000   Newmont Gold Co..............................      903,125
   61,500   Newmont Mining Corp..........................    2,152,500
                                                           -----------
                                                            10,735,625
                                                           -----------
            PLATINUM & PALLADIUM
   75,000   Stillwater Mining Co.*.......................    1,556,250
                                                           -----------
            SILVER
   20,000   Coeur D'Alene Mines Corp.*...................      207,500
                                                           -----------
 
            TOTAL UNITED STATES..........................   13,261,875
                                                           -----------
 
            TOTAL COMMON STOCKS
            (IDENTIFIED COST $44,291,482)................   36,431,242
                                                           -----------
</TABLE>
    
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       45
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
PORTFOLIO OF INVESTMENTS OCTOBER 31, 1997, CONTINUED
    
 
   
<TABLE>
<CAPTION>
PRINCIPAL
AMOUNT IN
THOUSANDS                                                     VALUE
- ----------------------------------------------------------------------
<C>         <S>                                            <C>
            SHORT-TERM INVESTMENTS (a) (9.4%)
            U.S. GOVERNMENT AGENCIES (8.8%)
$   3,400   Federal Home Loan Mortgage Corp. 5.49-5.65%
              due 11/03/97-11/06/97 (AMORTIZED COST
              $3,398,709)................................  $ 3,398,709
                                                           -----------
 
            REPURCHASE AGREEMENT (0.6%)
      249   The Bank of New York 5.50% due 11/03/97
              (dated 10/31/97; proceeds $249,067) (b)
              (IDENTIFIED COST $248,952).................      248,952
                                                           -----------
 
            TOTAL SHORT-TERM INVESTMENTS
            (IDENTIFIED COST $3,647,661).................    3,647,661
                                                           -----------
</TABLE>
    
 
   
<TABLE>
<S>                                                                                          <C>     <C>
TOTAL INVESTMENTS
(IDENTIFIED COST $47,939,143) (C)..........................................................  104.2 %   40,078,903
 
LIABILITIES IN EXCESS OF OTHER ASSETS......................................................   (4.2)    (1,598,609)
                                                                                             ------  ------------
 
NET ASSETS.................................................................................  100.0 % $ 38,480,294
                                                                                             ------  ------------
                                                                                             ------  ------------
</TABLE>
    
 
   
- ---------------------
 
ADR  American Depository Receipt.
GDR  Global Depository Receipt.
 *   Non-income producing security.
**   Resale is restricted to qualified institutional investors.
(a)  Securities were purchased on a discount basis. The interest rates shown
     have been adjusted to reflect a money market equivalent yield.
(b)  Collateralized by $247,927 U.S. Treasury Note 6.00% due 07/31/02 valued at
     $253,932.
(c)  The aggregate cost for federal income tax purposes approximates identified
     cost. The aggregate gross unrealized appreciation is $1,118,528 and the
     aggregate gross unrealized depreciation is $8,978,768, resulting in net
     unrealized depreciation of $7,860,240.
    
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       46
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
FINANCIAL STATEMENTS
    
 
   
STATEMENT OF ASSETS AND LIABILITIES
    
   
OCTOBER 31, 1997
    
 
   
<TABLE>
<S>                                                 <C>
ASSETS:
Investments in securities, at value
  (identified cost $47,939,143)...................  $40,078,903
Receivable for:
    Shares of beneficial interest sold............       41,799
    Dividends.....................................       31,990
Prepaid expenses and other assets.................       58,964
                                                    -----------
     TOTAL ASSETS.................................   40,211,656
                                                    -----------
LIABILITIES:
Payable for:
    Shares of beneficial interest repurchased.....    1,607,273
    Plan of distribution fee......................       38,722
    Investment management fee.....................       31,000
Accrued expenses and other payables...............       54,367
                                                    -----------
     TOTAL LIABILITIES............................    1,731,362
                                                    -----------
     NET ASSETS...................................  $38,480,294
                                                    -----------
                                                    -----------
COMPOSITION OF NET ASSETS:
Paid-in-capital...................................  $56,867,210
Net unrealized depreciation.......................   (7,860,375)
Accumulated net investment loss...................     (191,129)
Accumulated net realized loss.....................  (10,335,412)
                                                    -----------
     NET ASSETS...................................  $38,480,294
                                                    -----------
                                                    -----------
CLASS A SHARES:
Net Assets........................................      $32,257
Shares Outstanding (UNLIMITED AUTHORIZED, $.01 PAR
  VALUE)..........................................        4,703
     NET ASSET VALUE PER SHARE....................        $6.86
                                                    -----------
                                                    -----------
     MAXIMUM OFFERING PRICE PER SHARE,
       (NET ASSET VALUE PLUS 5.54% OF NET
       ASSET VALUE)...............................        $7.24
                                                    -----------
                                                    -----------
CLASS B SHARES:
Net Assets........................................  $37,964,399
Shares Outstanding (UNLIMITED AUTHORIZED, $.01 PAR
  VALUE)..........................................    5,546,284
     NET ASSET VALUE PER SHARE....................        $6.85
                                                    -----------
                                                    -----------
CLASS C SHARES:
Net Assets........................................     $474,996
Shares Outstanding (UNLIMITED AUTHORIZED, $.01 PAR
  VALUE)..........................................       69,409
     NET ASSET VALUE PER SHARE....................        $6.84
                                                    -----------
                                                    -----------
CLASS D SHARES:
Net Assets........................................       $8,642
Shares Outstanding (UNLIMITED AUTHORIZED, $.01 PAR
  VALUE)..........................................        1,259
     NET ASSET VALUE PER SHARE....................        $6.86
                                                    -----------
                                                    -----------
</TABLE>
    
 
   
STATEMENT OF OPERATIONS
    
   
FOR THE YEAR ENDED OCTOBER 31, 1997*
    
 
   
<TABLE>
<S>                                                 <C>
NET INVESTMENT INCOME:
INCOME
Dividends (net of $19,218 foreign withholding
  tax)............................................  $   339,125
Interest..........................................      292,931
                                                    -----------
     TOTAL INCOME.................................      632,056
                                                    -----------
EXPENSES
Plan of distribution fee (Class A shares).........           14
Plan of distribution fee (Class B shares).........      510,120
Plan of distribution fee (Class C shares).........          938
Investment management fee.........................      408,911
Transfer agent fees and expenses..................       91,291
Professional fees.................................       56,344
Registration fees.................................       53,300
Shareholder reports and notices...................       48,932
Custodian fees....................................       21,452
Trustees' fees and expenses.......................       10,390
Other.............................................        5,740
                                                    -----------
     TOTAL EXPENSES...............................    1,207,432
                                                    -----------
     NET INVESTMENT LOSS..........................     (575,376)
                                                    -----------
NET REALIZED AND UNREALIZED LOSS:
Net realized loss on:
    Investments...................................   (9,100,062)
    Foreign exchange transactions.................       (1,161)
                                                    -----------
     NET LOSS.....................................   (9,101,223)
                                                    -----------
Net change in unrealized appreciation/
  depreciation on:
    Investments...................................   (9,193,814)
    Translation of other assets and liabilities
      denominated in foreign currencies...........         (145)
                                                    -----------
     NET DEPRECIATION.............................   (9,193,959)
                                                    -----------
     NET LOSS.....................................  (18,295,182)
                                                    -----------
NET DECREASE......................................  $(18,870,558)
                                                    -----------
                                                    -----------
 
<FN>
- ---------------------
 *   Class A, Class C and Class D shares were issued July 28, 1997.
</TABLE>
    
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       47
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
FINANCIAL STATEMENTS, CONTINUED
    
 
   
STATEMENT OF CHANGES IN NET ASSETS
    
 
   
<TABLE>
<CAPTION>
                                                    FOR THE YEAR    FOR THE YEAR
                                                        ENDED          ENDED
                                                     OCTOBER 31,    OCTOBER 31,
                                                        1997*           1996
- --------------------------------------------------------------------------------
<S>                                                 <C>             <C>
 
INCREASE (DECREASE) IN NET ASSETS:
 
OPERATIONS:
Net investment loss...............................  $   (575,376)   $  (552,437)
Net realized gain (loss)..........................    (9,101,223)     3,861,093
Net change in unrealized
  appreciation/depreciation.......................    (9,193,959)     4,900,602
                                                    -------------   ------------
 
     NET INCREASE (DECREASE)......................   (18,870,558)     8,209,258
                                                    -------------   ------------
 
DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS FROM:
Net investment income
    Class B shares................................      (656,572)       --
Net realized gain
    Class B shares................................    (3,712,483)    (1,036,713)
                                                    -------------   ------------
 
     TOTAL DIVIDENDS AND DISTRIBUTIONS............    (4,369,055)    (1,036,713)
                                                    -------------   ------------
Net increase (decrease) from transactions in
  shares of beneficial interest...................       878,665     (1,779,587)
                                                    -------------   ------------
 
     NET INCREASE (DECREASE)......................   (22,360,948)     5,392,958
 
NET ASSETS:
Beginning of period...............................    60,841,242     55,448,284
                                                    -------------   ------------
 
     END OF PERIOD
    (INCLUDING ACCUMULATED NET INVESTMENT LOSSES
    OF $191,129 AND $567,810, RESPECTIVELY).......  $ 38,480,294    $60,841,242
                                                    -------------   ------------
                                                    -------------   ------------
 
<FN>
- ---------------------
 *   Class A, Class C and Class D shares were issued July 28, 1997.
</TABLE>
    
 
                       SEE NOTES TO FINANCIAL STATEMENTS
                                       48
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
NOTES TO FINANCIAL STATEMENTS OCTOBER 31, 1997
    
 
   
1. ORGANIZATION AND ACCOUNTING POLICIES
    
 
   
Dean Witter Precious Metals and Minerals Trust (the "Fund") is registered under
the Investment Company Act of 1940, as amended (the "Act"), as a diversified,
open-end management investment company. The Fund's investment objective is
long-term capital appreciation. The Fund will attempt to achieve its investment
objective by investing principally in the securities of foreign and domestic
companies engaged in the exploration, mining, fabrication, processing,
distribution or trading of precious metals and minerals or in companies engaged
in financing, managing, controlling or operating companies engaged in these
activities and also by investing a portion of its assets in gold, silver,
platinum and palladium bullion and coins. The Fund was organized as a
Massachusetts business trust on December 28, 1989 and commenced operations on
August 6, 1990. On July 28, 1997, the Fund commenced offering three additional
classes of shares, with the then current shares designated as Class B shares.
    
 
   
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 reported amounts and disclosures. Actual results could differ from those
estimates.
    
 
   
The following is a summary of significant accounting policies:
    
 
   
A. VALUATION OF INVESTMENTS -- (1) an equity security listed or traded on the
New York, American or other domestic or foreign stock exchange is valued at its
latest sale price on that exchange prior to the time when assets are valued; if
there were no sales that day, the security is valued at the latest bid price (in
cases where securities are traded on more than one exchange, the securities are
valued on the exchange designated as the primary market pursuant to procedures
adopted by the Trustees); (2) 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 Dean Witter InterCapital Inc. (the "Investment Manager") that sale
and bid prices are not reflective of a security's market value, portfolio
securities are valued at their fair value as determined in good faith
    
 
                                       49
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
NOTES TO FINANCIAL STATEMENTS OCTOBER 31, 1997, CONTINUED
    
 
   
under procedures established by and under the general supervision of the
Trustees (valuation of debt securities for which market quotations are not
readily available may be based upon current market prices of securities which
are comparable in coupon, rating and maturity or an appropriate matrix utilizing
similar factors); and (4) short-term debt securities having a maturity date of
more than sixty days at time of purchase are valued on a mark-to-market basis
until sixty days prior to maturity and thereafter at amortized cost based on
their value on the 61st day. Short-term debt securities having a maturity date
of sixty days or less at the time of purchase are valued at amortized cost.
    
 
   
B. ACCOUNTING FOR INVESTMENTS -- Security transactions are accounted for on the
trade date (date the order to buy or sell is executed). Realized gains and
losses on security transactions are determined by the identified cost method.
Dividend income and other distributions are recorded on the ex-dividend date
except for certain dividends from foreign securities which are recorded as soon
as the Fund is informed after the ex-dividend date. Discounts are accreted over
the life of the respective securities. Interest income is accrued daily.
    
 
   
C. MULTIPLE CLASS ALLOCATIONS -- Investment income, expenses (other than
distribution fees), and realized and unrealized gains and losses are allocated
to each class of shares based upon the relative net asset value on the date such
items are recognized. Distribution fees are charged directly to the respective
class.
    
 
   
D. FOREIGN CURRENCY TRANSLATION -- The books and records of the Fund are
maintained in U.S. dollars as follows: (1) the foreign currency market value of
investment securities, other assets and liabilities and forward foreign currency
contracts are translated at the exchange rates prevailing at the end of the
period; and (2) purchases, sales, income and expenses are translated at the
exchange rates prevailing on the respective dates of such transactions. The
resultant exchange gains and losses are included in the Statement of Operations
as realized and unrealized gain/loss on foreign exchange transactions. Pursuant
to U.S. Federal income tax regulations, certain foreign exchange gains/losses
included in realized and unrealized gain/loss are included in or are a reduction
of ordinary income for federal income tax purposes. The Fund does not isolate
that portion of the results of operations arising as a result of changes in the
foreign exchange rates from the changes in the market prices of the securities.
    
 
   
E. FORWARD FOREIGN CURRENCY CONTRACTS -- The Fund may enter into forward foreign
currency contracts which are valued daily at the appropriate exchange rates. The
resultant unrealized exchange gains and losses are included in the Statement of
Operations as unrealized foreign currency gain or loss and in the Statement of
Assets and Liabilities as part of the related foreign currency
    
 
                                       50
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
NOTES TO FINANCIAL STATEMENTS OCTOBER 31, 1997, CONTINUED
    
 
   
denominated asset or liability. The Fund records realized gains or losses on
delivery of the currency or at the time the forward contract is extinguished
(compensated) by entering into a closing transaction prior to delivery.
    
 
   
F. FEDERAL INCOME TAX STATUS -- It is the Fund's policy to comply with the
requirements of the Internal Revenue Code applicable to regulated investment
companies and to distribute all of its taxable income to its shareholders.
Accordingly, no federal income tax provision is required.
    
 
   
G. DIVIDENDS AND DISTRIBUTIONS TO SHAREHOLDERS -- The Fund records dividends and
distributions to its shareholders on the record date. The amount of dividends
and distributions from net investment income and net realized capital gains are
determined in accordance with federal income tax regulations which may differ
from generally accepted accounting principles. These "book/tax" differences are
either considered temporary or permanent in nature. To the extent that 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.
    
 
   
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 0.80% 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.
    
 
   
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
    
 
                                       51
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
NOTES TO FINANCIAL STATEMENTS OCTOBER 31, 1997, CONTINUED
    
 
   
Rule 12b-1 under the Act. The Plan provides that the Fund will pay the
Distributor a fee which is accrued daily and paid monthly at the following
annual rates: (i) Class A -- up to 0.25% of the average daily net assets of
Class A; (ii) Class B -- 1.0% of the lesser of: (a) the average daily aggregate
gross sales of the Class B shares since the inception of the Fund (not including
reinvestment of dividend or capital gain distributions) less the average daily
aggregate net asset value of the Class B shares redeemed since the Fund's
inception upon which a contingent deferred sales charge has been imposed or
waived; or (b) the average daily net assets of Class B; and (iii) Class C -- up
to 1.0% of the average daily net assets of Class C. In the case of Class A
shares, amounts paid under the Plan are paid to the Distributor for services
provided. In the case of Class B and Class C shares, amounts paid under the Plan
are paid to the Distributor for services provided and the expenses borne by it
and others in the distribution of the shares of these Classes, including the
payment of commissions for sales of these Classes and incentive compensation to,
and expenses of, 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, 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 $3,486,664 at October 31, 1997.
    
 
   
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
    
 
                                       52
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
NOTES TO FINANCIAL STATEMENTS OCTOBER 31, 1997, CONTINUED
    
 
   
that expenses representing a gross sales credit to account executives may be
reimbursed in the subsequent calendar year. For the period ended October 31,
1997, the distribution fee was accrued for Class A shares and Class C shares at
the annual rate of 0.25% and 1.0%, respectively.
    
 
   
The Distributor has informed the Fund that for the year ended October 31, 1997,
it received contingent deferred sales charges from certain redemptions of the
Fund's Class B shares and Class C shares of $168,786 and $270, respectively. The
respective shareholders pay such charges which are not an expense of the Fund.
    
 
   
4. SECURITY TRANSACTIONS AND TRANSACTIONS WITH AFFILIATES
    
 
   
The cost of purchases and proceeds from sales of portfolio securities, excluding
short-term investments, for the year ended October 31, 1997 aggregated
$24,268,174 and $26,955,238, respectively. Included in the aforementioned are
sales of U.S. Government securities of $3,337,938.
    
 
   
For the year ended October 31, 1997, the Fund incurred $750 in brokerage
commissions with DWR for portfolio transactions executed on behalf of the Fund.
    
 
   
Dean Witter Trust FSB, an affiliate of the Investment Manager and Distributor,
is the Fund's transfer agent. At October 31, 1997, the Fund had transfer agent
fees and expenses payable of approximately $2,300.
    
 
   
5. FEDERAL INCOME TAX STATUS
    
 
   
At October 31, 1997, the Fund had a net capital loss carryover of approximately
$10,239,000 available through October 31, 2005 to offset future capital gains to
the extent provided by regulations.
    
 
   
As of October 31, 1997, the Fund had temporary book/tax differences attributable
to capital loss deferrals on wash sales and income from the mark-to-market of
passive foreign investment companies ("PFICs") and permanent book/tax
differences primarily attributable to a net operating loss and tax adjustments
on PFICs sold by the Fund. To reflect reclassifications arising from the
permanent differences, paid-in-capital was charged $584,805, accumulated net
realized loss was charged $1,023,824 and accumulated net investment loss was
credited $1,608,629.
    
 
   
6. PURPOSES OF AND RISKS RELATING TO CERTAIN FINANCIAL INSTRUMENTS
    
 
   
The Fund may enter into forward foreign currency contracts ("forward contracts")
to facilitate settlement of foreign currency denominated portfolio transactions
or to manage foreign currency exposure associated with foreign currency
denominated securities.
    
 
                                       53
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
NOTES TO FINANCIAL STATEMENTS OCTOBER 31, 1997, CONTINUED
    
 
   
Forward contracts involve elements of market risk in excess of the amounts
reflected in the Statement of Assets and Liabilities. The Fund bears the risk of
an unfavorable change in the foreign exchange rates underlying the forward
contracts. Risks may also arise upon entering into these contracts from the
potential inability of the counterparties to meet the terms of their contracts.
    
 
   
At October 31, 1997, there were no outstanding forward contracts.
    
 
   
7. SHARES OF BENEFICIAL INTEREST
    
 
   
Transactions in shares of beneficial interest were as follows:
    
 
   
<TABLE>
<CAPTION>
                                                           FOR THE YEAR                FOR THE YEAR
                                                              ENDED                       ENDED
                                                         OCTOBER 31, 1997            OCTOBER 31, 1996
                                                    --------------------------  --------------------------
                                                      SHARES        AMOUNT        SHARES        AMOUNT
                                                    -----------  -------------  -----------  -------------
<S>                                                 <C>          <C>            <C>          <C>
CLASS A SHARES*
Sold..............................................        4,703  $      37,724      --            --
                                                    -----------  -------------  -----------  -------------
 
CLASS B SHARES
Sold..............................................   12,331,939    111,539,261   11,549,105  $ 136,343,744
Reinvestment of dividends and distributions.......      402,436      4,004,238       90,619        963,279
Redeemed..........................................  (12,648,999)  (115,262,441) (11,855,110)  (139,086,610)
                                                    -----------  -------------  -----------  -------------
Net increase (decrease) -- Class B................       85,376        281,058     (215,386)    (1,779,587)
                                                    -----------  -------------  -----------  -------------
 
CLASS C SHARES*
Sold..............................................       95,151        732,145      --            --
Redeemed..........................................      (25,742)      (182,272)     --            --
                                                    -----------  -------------  -----------  -------------
Net increase -- Class C...........................       69,409        549,873      --            --
                                                    -----------  -------------  -----------  -------------
 
CLASS D SHARES*
Sold..............................................        1,259         10,010      --            --
                                                    -----------  -------------  -----------  -------------
Net increase (decrease) in Fund...................      160,747  $     878,665     (215,386) $  (1,779,587)
                                                    -----------  -------------  -----------  -------------
                                                    -----------  -------------  -----------  -------------
</TABLE>
    
 
   
<TABLE>
<C>  <S>
<FN>
 
- ---------------------
 *   For the period July 28, 1997 (issue date) through October 31, 1997.
</TABLE>
    
 
                                       54
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
FINANCIAL HIGHLIGHTS
    
 
   
Selected ratios and per share data for a share of beneficial interest
outstanding throughout each period:
    
 
   
<TABLE>
<CAPTION>
                                                                                                                  FOR THE PERIOD
                                                           FOR THE YEAR ENDED OCTOBER 31                         AUGUST 6, 1990*
                                     -------------------------------------------------------------------------       THROUGH
                                     1997**++    1996       1995       1994       1993       1992       1991     OCTOBER 31, 1990
- ---------------------------------------------------------------------------------------------------------------------------------
 
<S>                                  <C>       <C>        <C>        <C>        <C>        <C>        <C>        <C>
CLASS B SHARES
 
PER SHARE OPERATING PERFORMANCE:
 
Net asset value, beginning of
 period............................   $11.14    $ 9.77     $11.45     $10.80     $ 7.87     $ 8.59     $ 8.57         $10.00
                                     --------  --------   --------   --------   --------   --------   --------        ------
 
Net investment income (loss).......    (0.10)    (0.10)     (0.08)     (0.06)     (0.04)     (0.05)      0.06           0.05
 
Net realized and unrealized gain
 (loss)............................    (3.35)     1.66      (1.38)      0.73       2.97      (0.62)      0.03          (1.48)
                                     --------  --------   --------   --------   --------   --------   --------        ------
 
Total from investment operations...    (3.45)     1.56      (1.46)      0.67       2.93      (0.67)      0.09          (1.43)
                                     --------  --------   --------   --------   --------   --------   --------        ------
 
Less dividends and distributions
 from:
   Net investment income...........    (0.13)    --         --         --         --         (0.04)     (0.07)       --
   Net realized gain...............    (0.71)    (0.19)     (0.22)     (0.02)     --         (0.01)     --           --
                                     --------  --------   --------   --------   --------   --------   --------        ------
 
Total dividends and
 distributions.....................    (0.84)    (0.19)     (0.22)     (0.02)     --         (0.05)     (0.07)       --
                                     --------  --------   --------   --------   --------   --------   --------        ------
 
Net asset value, end of period.....   $ 6.85    $11.14      $9.77     $11.45     $10.80     $ 7.87     $ 8.59         $ 8.57
                                     --------  --------   --------   --------   --------   --------   --------        ------
                                     --------  --------   --------   --------   --------   --------   --------        ------
 
TOTAL INVESTMENT RETURN+...........   (33.29)%   15.93%    (12.78)%     6.18%     37.23%     (7.97)%     1.23%        (14.30)%(1)
 
RATIOS TO AVERAGE NET ASSETS:
Expenses...........................     2.36 %    2.27%      2.29%      2.28%      2.79%      3.30%      2.18%(4)        1.49%(2)(3)
 
Net investment income (loss).......    (1.13)%   (0.84)%    (0.70)%    (0.87)%    (1.07)%    (0.74)%     0.93%(4)        2.99%(2)(3)
 
SUPPLEMENTAL DATA:
Net assets, end of period, in
 thousands.........................  $ 37,964  $ 60,841   $ 55,448   $ 73,444   $ 45,204   $ 15,135   $ 11,246             $5,843
 
Portfolio turnover rate............       53 %      46%        23%        46%        25%         9%        11%       --
 
Average commission rate paid.......   $0.0245   $0.0217     --         --         --         --         --           --
<FN>
 
- ---------------------
 *   Commencement of operations.
**   Prior to July 28, 1997, the Fund issued one class of shares. All shares of
     the Fund held prior to that date have been designated Class B shares.
++   The per share amounts were computed using an average number of shares
     outstanding during the period.
 +   Does not reflect the deduction of sales charge. Calculated based on the net
     asset value as of the last business day of the period.
(1)  Not annualized.
(2)  Annualized.
(3)  If the Fund had borne all expenses that were assumed or waived by the
     Investment Manager (after application of the Fund's expense limitation),
     the above annualized expense and net investment income ratios would have
     been 3.50% and 0.98%, respectively.
(4)  If the Fund had borne all expenses that were assumed or waived by the
     Investment Manager (after application of the Fund's expense limitation),
     the above annualized expense and net investment income ratios would have
     been 3.50% and (0.39)%, respectively.
</TABLE>
    
 
   
                       SEE NOTES TO FINANCIAL STATEMENTS
    
 
                                       55
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
FINANCIAL HIGHLIGHTS, CONTINUED
    
 
   
<TABLE>
<CAPTION>
                                                     FOR THE PERIOD
                                                     JULY 28, 1997*
                                                        THROUGH
                                                      OCTOBER 31,
                                                         1997++
- --------------------------------------------------------------------
<S>                                                 <C>
CLASS A SHARES
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..............       $ 7.95
Net realized and unrealized loss..................        (1.09)
                                                         ------
Net asset value, end of period....................       $ 6.86
                                                         ------
                                                         ------
 
TOTAL INVESTMENT RETURN+..........................       (13.71)%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses..........................................         1.61%(2)
Net investment loss...............................        (0.08)%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...........          $32
Portfolio turnover rate...........................           53%
Average commission rate paid......................          $ 0.0245
 
CLASS C SHARES
PER SHARE OPERATING PERFORMANCE:
Net asset value, beginning of period..............       $ 7.95
                                                         ------
Net investment loss...............................        (0.02)
Net realized and unrealized loss..................        (1.09)
                                                         ------
Total from investment operations..................        (1.11)
                                                         ------
Net asset value, end of period....................       $ 6.84
                                                         ------
                                                         ------
 
TOTAL INVESTMENT RETURN+..........................       (13.96)%(1)
RATIOS TO AVERAGE NET ASSETS:
Expenses..........................................         2.37%(2)
Net investment loss...............................        (0.79)%(2)
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...........         $475
Portfolio turnover rate...........................           53%
Average commission rate paid......................          $ 0.0245
<FN>
 
- ---------------------
 *   The date shares were first issued.
++   The per share amounts were computed using an average number of shares
     outstanding during the period.
 +   Does not reflect the deduction of sales charge. Calculated based on the net
     asset value as of the last business day of the period.
(1)  Not annualized.
(2)  Annualized.
</TABLE>
    
 
   
                       SEE NOTES TO FINANCIAL STATEMENTS
    
 
                                       56
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
FINANCIAL HIGHLIGHTS, CONTINUED
    
 
   
<TABLE>
<CAPTION>
                                                     FOR THE PERIOD
                                                     JULY 28, 1997*
                                                        THROUGH
                                                      OCTOBER 31,
                                                         1997++
- --------------------------------------------------------------------
 
<S>                                                 <C>
CLASS D SHARES
 
PER SHARE OPERATING PERFORMANCE:
 
Net asset value, beginning of period..............       $ 7.95
 
Net realized and unrealized loss..................        (1.09)
                                                         ------
 
Net asset value, end of period....................       $ 6.86
                                                         ------
                                                         ------
 
TOTAL INVESTMENT RETURN+..........................       (13.71)%(1)
 
RATIOS TO AVERAGE NET ASSETS:
Expenses..........................................         1.35%(2)
 
Net investment income.............................         0.22%(2)
 
SUPPLEMENTAL DATA:
Net assets, end of period, in thousands...........           $9
 
Portfolio turnover rate...........................           53%
 
Average commission rate paid......................          $ 0.0245
<FN>
 
- ---------------------
 *   The date shares were first issued.
++   The per share amounts were computed using an average number of shares
     outstanding during the period.
 +   Calculated based on the net asset value as of the last business day of the
     period.
(1)  Not annualized.
(2)  Annualized.
</TABLE>
    
 
   
                       SEE NOTES TO FINANCIAL STATEMENTS
    
 
                                       57
<PAGE>
   
DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
   
REPORT OF INDEPENDENT ACCOUNTANTS
    
 
   
TO THE SHAREHOLDERS AND TRUSTEES
OF DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
    
 
   
In our opinion, the accompanying statement of assets and liabilities, including
the portfolio of investments, and the related statements of operations and of
changes in net assets and the financial highlights present fairly, in all
material respects, the financial position of Dean Witter Precious Metals and
Minerals Trust (the "Fund") at October 31, 1997, the results of its operations
for the year then ended, the changes in its net assets for each of the two years
in the period then ended and the financial highlights for each of the periods
presented, in conformity with generally accepted accounting principles. These
financial statements and financial highlights (hereafter referred to as
"financial statements") are the responsibility of the Fund's management; our
responsibility is to express an opinion on these financial statements based on
our audits. We conducted our audits of these financial statements in accordance
with generally accepted auditing standards which require that we plan and
perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements, assessing the accounting principles used and significant estimates
made by management, and evaluating the overall financial statement presentation.
We believe that our audits, which included confirmation of securities at October
31, 1997 by correspondence with the custodian, provide a reasonable basis for
the opinion expressed above.
    
 
   
PRICE WATERHOUSE LLP
    
   
1177 AVENUE OF THE AMERICAS
    
   
NEW YORK, NEW YORK 10036
DECEMBER 5, 1997
    
 
   
                      1997 FEDERAL TAX NOTICE (UNAUDITED)
    
 
   
       During the year ended October 31, 1997, the Fund paid to
       shareholders $0.55 per share from long-term capital gains.
    
 
                                       58
<PAGE>


                    DEAN WITTER PRECIOUS METALS AND MINERALS TRUST

                               PART C OTHER INFORMATION



Item 24. Financial Statements and Exhibits

     a)  FINANCIAL STATEMENTS

    (1)  Financial statements and schedules, included
         in Prospectus (Part A):
                                                                         Page in
                                                                      Prospectus
                                                                      ----------

         Financial Highlights for the period August 6, 1990 
         through October 31, 1990 and for the years ended 
         October 31, 1991, 1992, 1993, 1994, 1995, 1996 and 
         1997 (Class B) . . . . . . . . . . . . . . . . . . . . . . .        6

         Financial Highlights for the period July 28, 1997 
         through October 31, 1997 (Class A, C, and D) . . . . . . . .        7

    (2)  Financial statements included in the Statement of 
         Additional Information (Part B):

                                                                         Page in
                                                                             SAI
                                                                          ------

         Portfolio of investments at October 31, 1997 . . . . . . . .       45

         Statement of Assets and Liabilities at October 31, 1997. . .       47

         Statement of Operations for the year ended 
         October 31, 1997 . . . . . . . . . . . . . . . . . . . . . .       47

         Statement of Changes in Net Assets for the years ended
         October 31, 1996 and 1997. . . . . . . . . . . . . . . . . .       48

         Notes to Financial Statements at October 31, 1997. . . . . .       49

         Financial Highlights for the period August 6, 1990 through
         October 31, 1990 and for the years ended October 31, 1991,
         1992, 1993, 1994, 1995, 1996 and 1997 (Class B). . . . . . .       55

         Financial Highlights for the period July 28, 1997 through
         October 31, 1997 (Class A, C, and D) . . . . . . . . . . . .       56

    (3)  Financial statements included in Part C:

         None

<PAGE>

     b)  EXHIBITS

      2. Amended and Restated By-Laws of the Registrant.

      8. Form of Transfer Agency and Service Agreement between the Registrant
         and Dean Witter Trust FSB.

     11. Consent of Independent Accountants.

     16. Schedules for Computations of Performance Quotations.

     27. Financial Data Schedules.

   Other.     Power of Attorney.
- --------------------------------------------------------------------------------
    All other exhibits were previously filed Via EDGAR and are hereby
    incorporated by reference.

Item 25. PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT

         None

Item 26. NUMBER OF HOLDERS OF SECURITIES
 
                 (1)                             (2)

                                       Number of Record Holders
             Title of Class              at November 30, 1997
             --------------            ------------------------
              Class A                              6
              Class B                          6,308
              Class C                             43
              Class D                              2

Item 27.      INDEMNIFICATION

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


                                          2

<PAGE>

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

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

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

    Registrant, in conjunction with the Investment Manager, Registrant's
Trustees, and other registered investment management companies managed by the
Investment Manager, maintains insurance on behalf of any person who is or was a
Trustee, officer, employee, or agent of Registrant, or who is or was serving at
the request of Registrant as a trustee, director, officer, employee or agent of
another trust or corporation, against any liability asserted against him and
incurred by him or arising out of his position.  However, in no event will
Registrant maintain insurance to indemnify any such person for any act for which
Registrant  itself is not permitted to indemnify him.

Item 28. BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISER

    See "The Fund and its Management" in the Prospectus regarding the business
of the investment adviser.  The following information is given regarding
officers of Dean Witter InterCapital Inc.  InterCapital is a wholly-owned
subsidiary of Morgan Stanley, Dean Witter, Discover & Co.  The principal address
of the Dean Witter Funds is Two World Trade Center, New York, New York  10048.

    The term "Dean Witter Funds" used below refers to the following registered
investment companies:

CLOSED-END INVESTMENT COMPANIES
  (1)    InterCapital Income Securities Inc.
  (2)    High Income Advantage Trust
  (3)    High Income Advantage Trust II
  (4)    High Income Advantage Trust III
  (5)    Municipal Income Trust


                                          3

<PAGE>

  (6)    Municipal Income Trust II
  (7)    Municipal Income Trust III
  (8)    Dean Witter Government Income Trust
  (9)    Municipal Premium Income Trust
  (10)   Municipal Income Opportunities Trust
  (11)   Municipal Income Opportunities Trust II
  (12)   Municipal Income Opportunities Trust III
  (13)   Prime Income Trust
  (14)   InterCapital Insured Municipal Bond Trust
  (15)   InterCapital Quality Municipal Income Trust
  (16)   InterCapital Quality Municipal Investment Trust
  (17)   InterCapital Insured Municipal Income Trust
  (18)   InterCapital California Insured Municipal Income Trust
  (19)   InterCapital Insured Municipal Trust
  (20)   InterCapital Quality Municipal Securities
  (21)   InterCapital New York Quality Municipal Securities
  (22)   InterCapital California Quality Municipal Securities
  (23)   InterCapital Insured California Municipal Securities
  (24)   InterCapital Insured Municipal Securities

OPEN-END INVESTMENT COMPANIES
  (1)    Dean Witter Short-Term Bond Fund
  (2)    Dean Witter Tax-Exempt Securities Trust
  (3)    Dean Witter Tax-Free Daily Income Trust
  (4)    Dean Witter Dividend Growth Securities Inc.
  (5)    Dean Witter Convertible Securities Trust
  (6)    Dean Witter Liquid Asset Fund Inc.
  (7)    Dean Witter Developing Growth Securities Trust
  (8)    Dean Witter Retirement Series
  (9)    Dean Witter Federal Securities Trust
  (10)   Dean Witter World Wide Investment Trust
  (11)   Dean Witter U.S. Government Securities Trust
  (12)   Dean Witter Select Municipal Reinvestment Fund
  (13)   Dean Witter High Yield Securities Inc.
  (14)   Dean Witter Intermediate Income Securities
  (15)   Dean Witter New York Tax-Free Income Fund
  (16)   Dean Witter California Tax-Free Income Fund
  (17)   Dean Witter Health Sciences Trust
  (18)   Dean Witter California Tax-Free Daily Income Trust
  (19)   Dean Witter Global Asset Allocation Fund
  (20)   Dean Witter American Value Fund
  (21)   Dean Witter Strategist Fund
  (22)   Dean Witter Utilities Fund
  (23)   Dean Witter World Wide Income Trust
  (24)   Dean Witter New York Municipal Money Market Trust
  (25)   Dean Witter Capital Growth Securities
  (26)   Dean Witter Precious Metals and Minerals Trust
  (27)   Dean Witter European Growth Fund Inc.
  (28)   Dean Witter Global Short-Term Income Fund Inc.
  (29)   Dean Witter Pacific Growth Fund Inc.
  (30)   Dean Witter Multi-State Municipal Series Trust


                                          4

<PAGE>

  (31)   Dean Witter Short-Term U.S. Treasury Trust
  (32)   Dean Witter Diversified Income Trust
  (33)   Dean Witter U.S. Government Money Market Trust
  (34)   Dean Witter Global Dividend Growth Securities
  (35)   Active Assets California Tax-Free Trust
  (36)   Dean Witter Natural Resource Development Securities Inc.
  (37)   Active Assets Government Securities Trust
  (38)   Active Assets Money Trust
  (39)   Active Assets Tax-Free Trust
  (40)   Dean Witter Limited Term Municipal Trust
  (41)   Dean Witter Variable Investment Series
  (42)   Dean Witter Value-Added Market Series
  (43)   Dean Witter Global Utilities Fund
  (44)   Dean Witter International SmallCap Fund
  (45)   Dean Witter Mid-Cap Growth Fund
  (46)   Dean Witter Select Dimensions Investment Series
  (47)   Dean Witter Balanced Growth Fund
  (48)   Dean Witter Balanced Income Fund
  (49)   Dean Witter Hawaii Municipal Trust
  (50)   Dean Witter Capital Appreciation Fund
  (51)   Dean Witter Intermediate Term U.S. Treasury Trust
  (52)   Dean Witter Information Fund
  (53)   Dean Witter Japan Fund
  (54)   Dean Witter Income Builder Fund
  (55)   Dean Witter Special Value Fund
  (56)   Dean Witter Financial Services Trust
  (57)   Dean Witter Market Leader Trust
  (58)   Dean Witter S&P 500 Index Fund
  (59)   Dean Witter Fund of Funds

      The term "TCW/DW Funds" refers to the following registered investment
companies:

OPEN-END INVESTMENT COMPANIES
  (1)    TCW/DW Core Equity Trust
  (2)    TCW/DW North American Government Income Trust
  (3)    TCW/DW Latin American Growth Fund
  (4)    TCW/DW Income and Growth Fund
  (5)    TCW/DW SmallCap Growth Fund
  (6)    TCW/DW Balanced Fund
  (7)    TCW/DW Total Return Trust
  (8)    TCW/DW Mid-Cap Equity Trust
  (9)    TCW/DE Global Telecom Trust
  (10)   TCW/DW Strategic Income Trust

CLOSED-END INVESTMENT COMPANIES
  (1)    TCW/DW Term Trust 2000
  (2)    TCW/DW Term Trust 2002
  (3)    TCW/DW Term Trust 2003
  (4)    TCW/DW Emerging Markets Opportunities Trust


                                          5

<PAGE>


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

Charles A. Fiumefreddo                 Executive Vice President and Director of
Chairman, Chief Executive              Dean Witter Reynolds Inc. ("DWR");  
Officer and Director                   Chairman, Chief Executive Officer and
                                       Director of Dean Witter Distributors
                                       Inc. ("Distributors") and Dean Witter
                                       Services Company Inc. ("DWSC"); Chairman
                                       and Director of Dean Witter Trust FSB
                                       ("DWT"); Chairman, Director or Trustee,
                                       President and Chief Executive Officer of
                                       the Dean Witter Funds and Chairman,
                                       Chief Executive Officer and Trustee of
                                       the TCW/DW Funds; Director and/or
                                       officer of various Morgan Stanley, Dean
                                       Witter, Discover & Co. ("MSDWD")
                                       subsidiaries; Formerly Executive Vice
                                       President and Director of Dean Witter,
                                       Discover & Co.

Philip J. Purcell                      Chairman, Chief Executive Officer and 
Director                               Director of MSDWD and DWR; Director of
                                       DWSC and Distributors; Director or
                                       Trustee of the Dean Witter Funds;
                                       Director and/or officer of various MSDWD
                                       subsidiaries.

Richard M. DeMartini                   President and Chief Operating Officer of
Director                               Dean Witter Capital, a division of DWR;
                                       Director of DWR, DWSC, Distributors and
                                       DWT; Trustee of the TCW/DW Funds.

James F. Higgins                       President and Chief Operating Officer of
Director                               Dean Witter Financial; Director of DWR,
                                       DWSC, Distributors and DWT.

Thomas C. Schneider                    Executive Vice President and Chief 
Executive Vice President               Strategic and Administrative Officer of 
Chief Financial Officer and Director   MSDWD; Executive Vice President and
                                       Chief Financial Officer of DWSC and
                                       Distributors; Director of DWR, DWSC,
                                       Distributors and MSDWD.

Christine A. Edwards                   Executive Vice President, Chief Legal 
Director                               Officer and Secretary of MSDWD;
                                       Executive Vice President, Secretary and
                                       Chief Legal Officer of Distributors;
                                       Director of DWR, DWSC and Distributors.


                                          6

<PAGE>

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

Robert M. Scanlan                      President and Chief Operating Officer of 
President and Chief Operating          DWSC; Executive Vice President of 
Officer                                Distributors; Executive Vice President
                                       and Director of DWT; Vice President of
                                       the Dean Witter Funds and the TCW/DW
                                       Funds.

Mitchell M. Merin                      President and Chief Strategic Officer of 
President and Chief Strategic          DWSC; Executive Vice President of 
Officer                                Distributors; Executive Vice President
                                       and Director of DWT; Executive Vice
                                       President and Director of DWR; Director
                                       of SPS Transaction Services, Inc. and
                                       various other MSDWD subsidiaries.

Joseph J. McAlinden                    Vice President of the Dean Witter Funds
Executive Vice President and           and Director of DWT.
Chief Investment Officer

Edward C. Oelsner III
Executive Vice President
 
John B. Van Heuvelen                   President, Chief Operating Officer and 
Executive Vice President               Director of DWT.

Barry Fink                             Assistant Secretary of DWR; Senior Vice 
Senior Vice President, Secretary       President, Secretary and General Counsel 
and General Counsel                    of DWSC; Senior Vice President,
                                       Assistant Secretary and Assistant
                                       General Counsel of Distributors; Vice
                                       President, Secretary and General Counsel
                                       of the Dean Witter Funds and the TCW/DW
                                       Funds.

Peter M. Avelar                        Vice President of various Dean Witter 
Senior Vice President                  Funds.

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

Richard Felegy
Senior Vice President

Edward F. Gaylor                       Vice President of various Dean Witter
Senior Vice President                  Funds.

Robert S. Giambrone                    Senior Vice President of DWSC,
Senior Vice President                  Distributors and DWT and Director of
                                       DWT; Vice President of the Dean Witter
                                       Funds and the TCW/DW Funds.


                                          7

<PAGE>

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

Rajesh K. Gupta                        Vice President of various Dean Witter 
Senior Vice President                  Funds.

Kenton J. Hichliffe                    Vice President of various Dean Witter 
Senior Vice President                  Funds.
 
Kevin Hurley                           Vice President of various Dean Witter 
Senior Vice President                  Funds.
 
Margaret Iannuzzi
Senior Vice President
 
Jenny Beth Jones                       Vice President of Dean Witter Special 
Senior Vice President                  Value Fund.

John B. Kemp, III                      Director of the Provident Savings Bank,
Senior Vice President                  Jersey City, New Jersey.

Anita H. Kolleeny                      Vice President of various Dean Witter 
Senior Vice President                  Funds.

Jonathan R. Page                       Vice President of various Dean Witter 
Senior Vice President                  Funds.

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

Guy G. Rutherfurd, Jr.                 Vice President of Dean Witter Market 
Senior Vice President                  Leader Trust.
 
Rafael Scolari                         Vice President of Prime Income Trust.
Senior Vice President

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

Jayne M. Stevlingson                   Vice President of various Dean Witter 
Senior Vice President                  Funds.

Paul D. Vance                          Vice President of various Dean Witter 
Senior Vice President                  Funds.

Elizabeth A. Vetell
Senior Vice President


                                          8

<PAGE>

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

James F. Willison                      Vice President of various Dean Witter 
Senior Vice President                  Funds.

Rondald J. Worobel                     Vice President of various Dean Witter 
Senior Vice President                  Funds.

Douglas Brown
First Vice President

Thomas F. Caloia                       First Vice President and Assistant 
First Vice President                   Treasurer of DWSC.  Treasurer of the 
and Assistant Treasurer                Dean Witter Funds and the TCW/DW Funds.

Thomas Chronert
Frist Vice President

Rosalie Clough
First Vice President
 
Marilyn K. Cranney                     Assistant Secretary of DWR; First Vice 
First Vice President                   President and Assistant Secretary of 
and Assistant Secretary                DWSC; Assistant Secretary of the Dean
                                       Witter Funds and the TCW/DW Funds.

Michael Interrante                     First Vice President and Controller of 
First Vice President and Controller    DWSC; Assistant Treasurer of
                                       Distributors; First Vice President and
                                       Treasurer of DWT.
David Johnson
First Vice President

Stanley Kapica
First Vice President

Robert Zimmerman
First Vice President

Dale Albright
Vice President

Joan G. Allman
Vice President

Andrew Arbenz
Vice President


                                          9

<PAGE>

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

Joseph Arcieri                         Vice President of various Dean Witter 
Vice President                         Funds.

Kirk Balzer                            Vice President of various Dean Witter 
Vice President                         Funds.

Nancy Belza
Vice President

Dale Boettcher
Vice President

Joseph Cardwell
Vice President

Philip Casparius
Vice President

B. Catherine Connelly
Vice President

Salvatore DeSteno                      Vice President of DWSC.
Vice President

Frank J. DeVito                        Vice President of DWSC.
Vice President

Bruce Dunn
Vice President

Michael Durbin
Vice President

Jeffrey D. Geffen
Vice President

Deborah Genovesse
Vice President

Michael Geringer
Vice President

Stephen Greenhut
Vice President


                                          10

<PAGE>

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

Peter W. Gurman
Vice President

Matthew Haynes                         Vice President of Dean Witter Variable 
Vice PResident                         Investment Series

Peter Hermann                          Vice President of various Dean Witter 
Vice President                         Funds.

Elizabeth Hinchman
Vice President
 
David Hoffman
Vice President

Christopher Jones
Vice President

Kevin Jung
Vice President
 
James P. Kastberg
Vice President

Michelle Kaufman                       Vice President of various Dean Witter 
Vice President                         Funds.

Michael Knox                           Vice President of various Dean Witter 
Vice President                         Funds.

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

Thomas Lawlor
Vice President

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

Catherine Maniscalco                   Vice President of Dean Witter Natural 
Vice President                         Resource Development Securities Inc.

Albert McGarity
Vice President


                                          11

<PAGE>

                                       OTHER SUBSTANTIAL BUSINESS, PROFESSION,
NAME AND POSITION                      VOCATION OR EMPLOYMENT, INCLUDING NAME,
WITH DEAN WITTER                       PRINCIPAL ADDRESS AND NATURE OF 
INTERCAPITAL INC.                      CONNECTION
- -----------------                      ---------------------------------------
 
LouAnne D. McInnis                     Vice President and Assistant Secretary 
Vice President and                     of DWSC; Assistant Secretary of the
Assistant Secretary                    Dean Witter Funds and the TCW/DW Funds.
 
Sharon K. Milligan
Vice President
 
Julie Morrone
Vice President
 
Mary Beth Mueller
Vice President

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

James Nash
Vice President

Richard Norris
Vice President

Carsten Otto                           Vice President and Assistant Secretary 
Vice President and                     of DWSC; Assistant Secretary of the 
Assistant Secretary                    Dean Witter Funds and the TCW/DW Funds.

George Paoletti
Vice President

Anne Pickrell                          Vice President of Dean Witter Global 
Vice President                         Short-Term Income Fund Inc.

Michael Roan
Vice President

Hugh Rose
Vice President

Robert Rossetti                        Vice President of Dean Witter Precious 
Vice President                         Metals and Minerals Trust.

Ruth Rossi                             Vice President and Assistant Secretary 
Vice President and                     of DWSC; Assistant Secretary of the
Assistant Secretary                    Dean Witter Funds and the TCW/DW Funds.


                                          12

<PAGE>

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

Carl F. Sadler
Vice President

Peter Seeley                           Vice President of Dean Witter World Wide 
Vice President                         Income Trust.

Naomi Stein
Vice President

Kathleen H. Stromberg                  Vice President of various Dean Witter 
Vice President                         Funds.

 
Marybeth Swisher
Vice President
 
Vinh Q. Tran                           Vice President of various Dean Witter 
Vice President                         Funds.
 
Robert Vanden Assem
Vice President
 
James P.  Wallin
Vice President

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

Item 29. PRINCIPAL UNDERWRITERS

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

    (1)  Dean Witter Liquid Asset Fund Inc.
    (2)  Dean Witter Tax-Free Daily Income Trust
    (3)  Dean Witter California Tax-Free Daily Income Trust
    (4)  Dean Witter Retirement Series
    (5)  Dean Witter Dividend Growth Securities Inc.
    (6)  Dean Witter Global Asset Allocation
    (7)  Dean Witter World Wide Investment Trust
    (8)  Dean Witter Capital Growth Securities
    (9)  Dean Witter Convertible Securities Trust
    (10) Active Assets Tax-Free Trust
    (11) Active Assets Money Trust
    (12) Active Assets California Tax-Free Trust
    (13) Active Assets Government Securities Trust


                                          13

<PAGE>

    (14) Dean Witter Short-Term Bond Fund
    (15) Dean Witter Mid-Cap Growth Fund
    (16) Dean Witter U.S. Government Securities Trust
    (17) Dean Witter High Yield Securities Inc.
    (18) Dean Witter New York Tax-Free Income Fund
    (19) Dean Witter Tax-Exempt Securities Trust
    (20) Dean Witter California Tax-Free Income Fund
    (21) Dean Witter Limited Term Municipal Trust
    (22) Dean Witter Natural Resource Development Securities Inc.
    (23) Dean Witter World Wide Income Trust
    (24) Dean Witter Utilities Fund
    (25) Dean Witter Strategist Fund
    (26) Dean Witter New York Municipal Money Market Trust
    (27) Dean Witter Intermediate Income Securities
    (28) Dean Witter European Growth Fund Inc.
    (29) Dean Witter Developing Growth Securities Trust
    (30) Dean Witter Precious Metals and Minerals Trust
    (31) Dean Witter Pacific Growth Fund Inc.
    (32) Dean Witter Multi-State Municipal Series Trust
    (33) Dean Witter Federal Securities Trust
    (34) Dean Witter Short-Term U.S. Treasury Trust
    (35) Dean Witter Diversified Income Trust
    (36) Dean Witter Health Sciences Trust
    (37) Dean Witter Global Dividend Growth Securities
    (38) Dean Witter American Value Fund
    (39) Dean Witter U.S. Government Money Market Trust
    (40) Dean Witter Global Short-Term Income Fund Inc.
    (41) Dean Witter Value-Added Market Series
    (42) Dean Witter Global Utilities Fund
    (43) Dean Witter International SmallCap Fund
    (44) Dean Witter Balanced Growth Fund
    (45) Dean Witter Balanced Income Fund
    (46) Dean Witter Hawaii Municipal Trust
    (47) Dean Witter Variable Investment Series
    (48) Dean Witter Capital Appreciation Fund
    (49) Dean Witter Intermediate Term U.S. Treasury Trust
    (50) Dean Witter Information Fund
    (51) Dean Witter Japan Fund
    (52) Dean Witter Income Builder Fund
    (53) Dean Witter Special Value Fund
    (54) Dean Witter Financial Services Trust
    (55) Dean Witter Market Leader Trust
    (56) Dean Witter S&P 500 Index Fund
    (57) Dean Witter Fund of Funds
    (1)  TCW/DW Core Equity Trust
    (2)  TCW/DW North American Government Income Trust
    (3)  TCW/DW Latin American Growth Fund
    (4)  TCW/DW Income and Growth Fund
    (5)  TCW/DW SmallCap Growth Fund
    (6)  TCW/DW Balanced Fund
    (7)  TCW/DW Total Return Trust


                                          14

<PAGE>

    (8)  TCW/DW Mid-Cap Equity Trust
    (9)  TCW/DW Global Telecom Trust
    (10) TCW/DW Strategic Income Trust

    (b)  The following information is given regarding directors and officers of
         Distributors not listed in Item 28 above.  The principal address of
         Distributors is Two World Trade Center, New York, New York 10048. 
         None of the following persons has any position or office with the
         Registrant.

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

Fredrick K. Kubler           Senior Vice President, Assistant
                             Secretary and Chief Compliance Officer.

Michael T. Gregg             Vice President and Assistant Secretary.

Item 30. LOCATION OF ACCOUNTS AND RECORDS

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

Item 31. MANAGEMENT SERVICES

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

Item 32. UNDERTAKINGS

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


                                          15

<PAGE>

                                      SIGNATURES
                                           
    Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, the Registrant certifies that it meets all of
the requirements for effectiveness of this Registration Statement pursuant to
Rule 485(b) under the Securities Act of 1933 and has duly caused this
Post-Effective Amendment to the Registration Statement to be signed on its
behalf by the undersigned, thereunto duly authorized, in the City of New York
and State of New York on the 30th day of December, 1997.

                             DEAN WITTER PRECIOUS METALS AND MINERALS TRUST

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

    Pursuant to the requirements of the Securities Act of 1933, this
Post-Effective Amendment No. 9 has been signed below by the following persons in
the capacities and on the dates indicated.

    Signatures                         Title                     Date
    ----------                         -----                     ----

(1) Principal Executive Officer        President, Chief 
                                       Executive Officer,
                                       Trustee and Chairman

By /s/ Charles A. Fiumefreddo                                    12/30/97
   ---------------------------
       Charles A. Fiumefreddo

(2) Principal Financial Officer        Treasurer and Principal
                                       Accounting Officer
                   
By /s/ Thomas F. Caloia                                          12/30/97
   ---------------------------
       Thomas F. Caloia

(3) Majority of the Trustees  

    Charles A. Fiumefreddo (Chairman)
    Philip J. Purcell          

By /s/ Barry Fink                                                12/30/97
   ---------------------------
       Barry Fink
       Attorney-in-Fact

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

By  /s/ David M. Butowsky                                        12/30/97
    ---------------------------
        David M. Butowsky   
        Attorney-in-Fact 
<PAGE>

                    DEAN WITTER PRECIOUS METALS AND MINERALS TRUST
                                    EXHIBIT INDEX

     2.  Amended and Restated By-Laws of the Registrant.

     8.  Form of Transfer Agency and Service Agreement between the Registrant
         and Dean Witter Trust FSB.
    
    11.  Consent of Independent Accountants.

    16.  Schedules for Computations of Performance Quotations.
    
    27.  Financial Data Schedules.

 Other.  Power of Attorney.

- --------------------------------------------------------------------------------
    All other exhibits were previously filed via EDGAR and are hereby
    incorporated by reference.
    

<PAGE>

                                   BY-LAWS 

                                      OF 

                DEAN WITTER PRECIOUS METALS AND MINERALS TRUST 
                 AMENDED AND RESTATED AS OF OCTOBER 23, 1997 

                                  ARTICLE I 
                                 DEFINITIONS 

   The terms "COMMISSION," "DECLARATION," "DISTRIBUTOR," "INVESTMENT 
ADVISER," "MAJORITY SHAREHOLDER VOTE," "1940 ACT," "SHAREHOLDER," "SHARES," 
"TRANSFER AGENT," "TRUST," "TRUST PROPERTY," and "TRUSTEES" have the 
respective meanings given them in the Declaration of Trust of Dean Witter 
Precious Metals and Minerals Trust dated December 27, 1989. 

                                  ARTICLE II 
                                   OFFICES 

   SECTION 2.1. PRINCIPAL OFFICE. Until changed by the Trustees, the 
principal office of the Trust in the Commonwealth of Massachusetts shall be 
in the City of Boston, County of Suffolk. 

   SECTION 2.2. OTHER OFFICES. In addition to its principal office in the 
Commonwealth of Massachusetts, the Trust may have an office or offices in the 
City of New York, State of New York, and at such other places within and 
without the Commonwealth as the Trustees may from time to time designate or 
the business of the Trust may require. 

                                 ARTICLE III 
                            SHAREHOLDERS' MEETINGS 

   SECTION 3.1. PLACE OF MEETINGS. Meetings of Shareholders shall be held at 
such place, within or without the Commonwealth of Massachusetts, as may be 
designated from time to time by the Trustees. 

   SECTION 3.2. MEETINGS. Meetings of Shareholders of the Trust shall be held 
whenever called by the Trustees or the President of the Trust and whenever 
election of a Trustee or Trustees by Shareholders is required by the 
provisions of Section 16(a) of the 1940 Act, for that purpose. Meetings of 
Shareholders shall also be called by the Secretary upon the written request 
of the holders of Shares entitled to vote not less than twenty-five (25%) of 
all the votes entitled to be cast at such meeting, except to the extent 
otherwise required by Section 16(c) of the 1940 Act, as made applicable to 
the Trust by the provisions of Section 2.3 of the Declaration. Such request 
shall state the purpose or purposes of such meeting and the matters proposed 
to be acted on thereat. Except to the extent otherwise required by Section 
16(c) of the 1940 Act, as made applicable to the Trust by the provisions of 
Section 2.3 of the Declaration, the Secretary shall inform such Shareholders 
of the reasonable estimated cost of preparing and mailing such notice of the 
meeting, and upon payment to the Trust of such costs, the Secretary shall 
give notice stating the purpose or purposes of the meeting to all entitled to 
vote at such meeting. No meeting need be called upon the request of the 
holders of Shares entitled to cast less than a majority of all votes entitled 
to be cast at such meeting, to consider any matter which is substantially the 
same as a matter voted upon at any meeting of Shareholders held during the 
preceding twelve months. 

   SECTION 3.3. NOTICE OF MEETINGS. Written or printed notice of every 
Shareholders' meeting stating the place, date, and purpose or purposes 
thereof, shall be given by the Secretary not less than ten (10) nor more than 
ninety (90) days before such meeting to each Shareholder entitled to vote at 
such meeting. Such notice shall be deemed to be given when deposited in the 
United States mail, postage prepaid, directed to the Shareholder at his 
address as it appears on the records of the Trust. 


                                          1
<PAGE>

   SECTION 3.4 QUORUM AND ADJOURNMENT OF MEETINGS. Except as otherwise 
provided by law, by the Declaration or by these By-Laws, at all meetings of 
Shareholders, the holders of a majority of the Shares issued and outstanding 
and entitled to vote thereat, present in person or represented by proxy, 
shall be requisite and shall constitute a quorum for the transaction of 
business. In the absence of a quorum, the Shareholders present or represented 
by proxy and entitled to vote thereat shall have the power to adjourn the 
meeting from time to time. The Shareholders present in person or represented 
by proxy at any meeting and entitled to vote thereat also shall have the 
power to adjourn the meeting from time to time if the vote required to 
approve or reject any proposal described in the original notice of such 
meeting is not obtained (with proxies being voted for or against adjournment 
consistent with the votes for and against the proposal for which the required 
vote has not been obtained). The affirmative vote of the holders of a 
majority of the Shares then present in person or represented by proxy shall 
be required to adjourn any meeting. Any adjourned meeting may be reconvened 
without further notice or change in record date. At any reconvened meeting at 
which a quorum shall be present, any business may be transacted that might 
have been transacted at the meeting as originally called. 

   SECTION 3.5. VOTING RIGHTS, PROXIES. At each meeting of Shareholders, each 
holder of record of Shares entitled to vote thereat shall be entitled to one 
vote in person or by proxy, executed in writing by the Shareholder or his 
duly authorized attorney-in-fact, for each Share of beneficial interest of 
the Trust and for the fractional portion of one vote for each fractional 
Share entitled to vote so registered in his name on the records of the Trust 
on the date fixed as the record date for the determination of Shareholders 
entitled to vote at such meeting. No proxy shall be valid after eleven months 
from its date, unless otherwise provided in the proxy. At all meetings of 
Shareholders, unless the voting is conducted by inspectors, all questions 
relating to the qualification of voters and the validity of proxies and the 
acceptance or rejection of votes shall be decided by the chairman of the 
meeting. Pursuant to a resolution of a majority of the Trustees, proxies may 
be solicited in the name of one or more Trustees or Officers of the Trust. 

   SECTION 3.6. VOTE REQUIRED. Except as otherwise provided by law, by the 
Declaration of Trust, or by these By-Laws, at each meeting of Shareholders at 
which a quorum is present, all matters shall be decided by Majority 
Shareholder Vote. 

   SECTION 3.7. INSPECTORS OF ELECTION. In advance of any meeting of 
Shareholders, the Trustees may appoint Inspectors of Election to act at the 
meeting or any adjournment thereof. If Inspectors of Election are not so 
appointed, the chairman of any meeting of Shareholders may, and on the 
request of any Shareholder or his proxy shall, appoint Inspectors of Election 
of the meeting. In case any person appointed as Inspector fails to appear or 
fails or refuses to act, the vacancy may be filled by appointment made by the 
Trustees in advance of the convening of the meeting or at the meeting by the 
person acting as chairman. The Inspectors of Election shall determine the 
number of Shares outstanding, the Shares represented at the meeting, the 
existence of a quorum, the authenticity, validity and effect of proxies, 
shall receive votes, ballots or consents, shall hear and determine all 
challenges and questions in any way arising in connection with the right to 
vote, shall count and tabulate all votes or consents, determine the results, 
and do such other acts as may be proper to conduct the election or vote with 
fairness to all Shareholders. On request of the chairman of the meeting, or 
of any Shareholder or his proxy, the Inspectors of Election shall make a 
report in writing of any challenge or question or matter determined by them 
and shall execute a certificate of any facts found by them. 

   SECTION 3.8. INSPECTION OF BOOKS AND RECORDS. Shareholders shall have such 
rights and procedures of inspection of the books and records of the Trust as 
are granted to Shareholders under the Corporations and Associations Law of 
the State of Maryland. 

   SECTION 3.9. ACTION BY SHAREHOLDERS WITHOUT MEETING. Except as otherwise 
provided by law, the provisions of these By-Laws relating to notices and 
meetings to the contrary notwithstanding, any action required or permitted to 
be taken at any meeting of Shareholders may be taken without a meeting if a 
majority of the Shareholders entitled to vote upon the action consent to the 
action in writing and such consents are filed with the records of the Trust. 
Such consent shall be treated for all purposes as a vote taken at a meeting 
of Shareholders. 


                                          2
<PAGE>

   SECTION 3.10. PRESENCE AT MEETINGS. Presence at meetings of shareholders 
requires physical attendance by the shareholder or his or her proxy at the 
meeting site and does not encompass attendance by telephonic or other 
electronic means. 

                                  ARTICLE IV 
                                   TRUSTEES 

   SECTION 4.1. MEETINGS OF THE TRUSTEES. The Trustees may in their 
discretion provide for regular or special meetings of the Trustees. Regular 
meetings of the Trustees may be held at such time and place as shall be 
determined from time to time by the Trustees without further notice. Special 
meetings of the Trustees may be called at any time by the President and shall 
be called by the President or the Secretary upon the written request of any 
two (2) Trustees. 

   SECTION 4.2. NOTICE OF SPECIAL MEETINGS. Written notice of special 
meetings of the Trustees, stating the place, date and time thereof, shall be 
given not less than two (2) days before such meeting to each Trustee, 
personally, by telegram, by mail, or by leaving such notice at his place of 
residence or usual place of business. If mailed, such notice shall be deemed 
to be given when deposited in the United States mail, postage prepaid, 
directed to the Trustee at his address as it appears on the records of the 
Trust. Subject to the provisions of the 1940 Act, notice or waiver of notice 
need not specify the purpose of any special meeting. 

   SECTION 4.3. TELEPHONE MEETINGS. Subject to the provisions of the 1940 
Act, any Trustee, or any member or members of any committee designated by the 
Trustees, may participate in a meeting of the Trustees, or any such 
committee, as the case may be, by means of a conference telephone or similar 
communications equipment if all persons participating in the meeting can hear 
each other at the same time. Participation in a meeting by these means 
constitutes presence in person at the meeting. 

   SECTION 4.4. QUORUM, VOTING AND ADJOURNMENT OF MEETINGS. At all meetings 
of the Trustees, a majority of the Trustees shall be requisite to and shall 
constitute a quorum for the transaction of business. If a quorum is present, 
the affirmative vote of a majority of the Trustees present shall be the act 
of the Trustees, unless the concurrence of a greater proportion is expressly 
required for such action by law, the Declaration or these By-Laws. If at any 
meeting of the Trustees there be less than a quorum present, the Trustees 
present thereat may adjourn the meeting from time to time, without notice 
other than announcement at the meeting, until a quorum shall have been 
obtained. 

   SECTION 4.5. ACTION BY TRUSTEES WITHOUT MEETING. The provisions of these 
By-Laws covering notices and meetings to the contrary notwithstanding, and 
except as required by law, any action required or permitted to be taken at 
any meeting of the Trustees may be taken without a meeting if a consent in 
writing setting forth the action shall be signed by all of the Trustees 
entitled to vote upon the action and such written consent is filed with the 
minutes of proceedings of the Trustees. 

   SECTION 4.6. EXPENSES AND FEES. Each Trustee may be allowed expenses, if 
any, for attendance at each regular or special meeting of the Trustees, and 
each Trustee who is not an officer or employee of the Trust or of its 
investment manager or underwriter or of any corporate affiliate of any of 
said persons shall receive for services rendered as a Trustee of the Trust 
such compensation as may be fixed by the Trustees. Nothing herein contained 
shall be construed to preclude any Trustee from serving the Trust in any 
other capacity and receiving compensation therefor. 

   SECTION 4.7.  EXECUTION OF INSTRUMENTS AND DOCUMENTS AND SIGNING OF CHECKS 
AND OTHER OBLIGATIONS AND TRANSFERS. All instruments, documents and other 
papers shall be executed in the name and on behalf of the Trust and all 
checks, notes, drafts and other obligations for the payment of money by the 
Trust shall be signed, and all transfer of securities standing in the name of 
the Trust shall be executed, by the Chairman, the President, any Vice 
President or the Treasurer or by any one or more officers or agents of the 
Trust as shall be designated for that purpose by vote of the Trustees; 
notwithstanding the above, nothing in this Section 4.7 shall be deemed to 
preclude the electronic authorization, by designated persons, of the Trust's 
Custodian (as described herein in Section 9.1) to transfer assets of the 
Trust, as provided for herein in Section 9.1. 


                                          3
<PAGE>

   SECTION 4.8. INDEMNIFICATION OF TRUSTEES, OFFICERS, EMPLOYEES AND 
AGENTS. (a) The Trust shall indemnify any person who was or is a party or is 
threatened to be made a party to any threatened, pending, or completed 
action, suit or proceeding, whether civil, criminal, administrative or 
investigative (other than an action by or in the right of the Trust) by 
reason of the fact that he is or was a Trustee, officer, employee, or agent 
of the Trust. The indemnification shall be against expenses, including 
attorneys' fees, judgments, fines, and amounts paid in settlement, actually 
and reasonably incurred by him in connection with the action, suit, or 
proceeding, if he acted in good faith and in a manner he reasonably believed 
to be in or not opposed to the best interests of the Trust, and, with respect 
to any criminal action or proceeding, had no reasonable cause to believe his 
conduct was unlawful. The termination of any action, suit or proceeding by 
judgment, order, settlement, conviction, or upon a plea of nolo contendere or 
its equivalent, shall not, of itself, create a presumption that the person 
did not act in good faith and in a manner which he reasonably believed to be 
in or not opposed to the best interests of the Trust, and, with respect to 
any criminal action or proceeding, had reasonable cause to believe that his 
conduct was unlawful. 

   (b) The Trust shall indemnify any person who was or is a party or is 
threatened to be made a party to any threatened, pending or completed action 
or suit by or on behalf of the Trust to obtain a judgment or decree in its 
favor by reason of the fact that he is or was a Trustee, officer, employee, 
or agent of the Trust. The indemnification shall be against expenses, 
including attorneys' fees actually and reasonably incurred by him in 
connection with the defense or settlement of the action or suit, if he acted 
in good faith and in a manner he reasonably believed to be in or not opposed 
to the best interests of the Trust; except that no indemnification shall be 
made in respect of any claim, issue, or matter as to which the person has 
been adjudged to be liable for negligence or misconduct in the performance of 
his duty to the Trust, except to the extent that the court in which the 
action or suit was brought, or a court of equity in the county in which the 
Trust has its principal office, determines upon application that, despite the 
adjudication of liability but in view of all circumstances of the case, the 
person is fairly and reasonably entitled to indemnity for those expenses 
which the court shall deem proper, provided such Trustee, officer, employee 
or agent is not adjudged to be liable by reason of his willful misfeasance, 
bad faith, gross negligence or reckless disregard of the duties involved in 
the conduct of his office. 

   (c) To the extent that a Trustee, officer, employee, or agent of the Trust 
has been successful on the merits or otherwise in defense of any action, suit 
or proceeding referred to in subsection (a) or (b) or in defense of any 
claim, issue or matter therein, he shall be indemnified against expenses, 
including attorneys' fees, actually and reasonably incurred by him in 
connection therewith. 

   (d) (1) Unless a court orders otherwise, any indemnification under 
subsections (a) or (b) of this section may be made by the Trust only as 
authorized in the specific case after a determination that indemnification of 
the Trustee, officer, employee, or agent is proper in the circumstances 
because he has met the applicable standard of conduct set forth in 
subsections (a) or (b). 

       (2) The determination shall be made: 

           (i) By the Trustees, by a majority vote of a quorum which consists of
     Trustees who were not parties to the action, suit or proceeding; or 

          (ii) If the required quorum is not obtainable, or if a quorum of
     disinterested Trustees so directs, by independent legal counsel in a 
     written opinion; or

         (iii) By the Shareholders. 

       (3) Notwithstanding any provision of this Section 4.8, no person shall be
     entitled to indemnification for any liability, whether or not there is 
     an adjudication of liability, arising by reason of willful misfeasance, 
     bad faith, gross negligence, or reckless disregard of duties as described
     in Section 17(h) and (i) of the Investment Company Act of 1940 ("disabling
     conduct"). A person shall be deemed not liable by reason of 
     disabling conduct if, either: 

         (i) a final decision on the merits is made by a court or other body
     before whom the proceeding was brought that the person to be indemnified 
     ("indemnitee") was not liable by reason of disabling conduct; or 


                                          4
<PAGE>

         (ii) in the absence of such a decision, a reasonable determination,
     based upon a review of the facts, that the indemnitee was not liable by 
     reason of disabling conduct, is made by either-- 

              (A) a majority of a quorum of Trustees who are neither
         "interested persons" of the Trust, as defined in Section 2(a)(19) of
         the Investment Company Act of 1940, nor parties to the action, suit or
         proceeding, or 

              (B) an independent legal counsel in a written opinion.

   (e) Expenses, including attorneys' fees, incurred by a Trustee, officer, 
employee or agent of the Trust in defending a civil or criminal action, suit 
or proceeding may be paid by the Trust in advance of the final disposition 
thereof if: 

         (1) authorized in the specific case by the Trustees; and 

         (2) the Trust receives an undertaking by or on behalf of the Trustee,
     officer, employee or agent of the Trust to repay the advance if it is not
     ultimately determined that such person is entitled to be indemnified by
     the Trust; and 

         (3) either, (i) such person provides a security for his undertaking,
     or 

             (ii) the Trust is insured against losses by reason of any lawful 
         advances, or 

             (iii) a determination, based on a review of readily available 
         facts, that there is reason to believe that such person ultimately 
         will be found entitled to indemnification, is made by either-- 

                   (A) a majority of a quorum which consists of Trustees who
             are neither "interested persons" of the Trust, as defined in
             Section 2(a)(19) of the 1940 Act, nor parties to the action, suit
             or proceeding, or 

                   (B) an independent legal counsel in a written opinion.

   (f) The indemnification provided by this Section shall not be deemed 
exclusive of any other rights to which a person may be entitled under any 
by-law, agreement, vote of Shareholders or disinterested Trustees or 
otherwise, both as to action in his official capacity and as to action in 
another capacity while holding the office, and shall continue as to a person 
who has ceased to be a Trustee, officer, employee, or agent and inure to the 
benefit of the heirs, executors and administrators of such person; provided 
that no person may satisfy any right of indemnity or reimbursement granted 
herein or to which he may be otherwise entitled except out of the property of 
the Trust, and no Shareholder shall be personally liable with respect to any 
claim for indemnity or reimbursement or otherwise. 

   (g) The Trust may purchase and maintain insurance on behalf of any person 
who is or was a Trustee, officer, employee, or agent of the Trust, against 
any liability asserted against him and incurred by him in any such capacity, 
or arising out of his status as such. However, in no event will the Trust 
purchase insurance to indemnify any officer or Trustee against liability for 
any act for which the Trust itself is not permitted to indemnify him. 

   (h) Nothing contained in this Section shall be construed to protect any 
Trustee or officer of the Trust against any liability to the Trust or to its 
security holders to which he would otherwise be subject by reason of willful 
misfeasance, bad faith, gross negligence or reckless disregard of the duties 
involved in the conduct of his office. 

                                  ARTICLE V 
                                  COMMITTEES 

   SECTION 5.1. EXECUTIVE AND OTHER COMMITTEES. The Trustees, by resolution 
adopted by a majority of the Trustees, may designate an Executive Committee 
and/or committees, each committee to consist of two (2) or more of the 
Trustees of the Trust and may delegate to such committees, in the intervals 
between meetings of the Trustees, any or all of the powers of the Trustees in 
the management of the business and affairs of the Trust. In the absence of 
any member of any such committee, the members thereof present 


                                          5
<PAGE>

at any meeting, whether or not they constitute a quorum, may appoint a 
Trustee to act in place of such absent member. Each such committee shall keep 
a record of its proceedings. 

   The Executive Committee and any other committee shall fix its own rules or 
procedure, but the presence of at least fifty percent (50%) of the members of 
the whole committee shall in each case be necessary to constitute a quorum of 
the committee and the affirmative vote of the majority of the members of the 
committee present at the meeting shall be necessary to take action. 

   All actions of the Executive Committee shall be reported to the Trustees 
at the meeting thereof next succeeding to the taking of such action. 

   SECTION 5.2. ADVISORY COMMITTEE. The Trustees may appoint an advisory 
committee which shall be composed of persons who do not serve the Trust in 
any other capacity and which shall have advisory functions with respect to 
the investments of the Trust but which shall have no power to determine that 
any security or other investment shall be purchased, sold or otherwise 
disposed of by the Trust. The number of persons constituting any such 
advisory committee shall be determined from time to time by the Trustees. The 
members of any such advisory committee may receive compensation for their 
services and may be allowed such fees and expenses for the attendance at 
meetings as the Trustees may from time to time determine to be appropriate. 

   SECTION 5.3. COMMITTEE ACTION WITHOUT MEETING. The provisions of these 
By-Laws covering notices and meetings to the contrary notwithstanding, and 
except as required by law, any action required or permitted to be taken at 
any meeting of any Committee of the Trustees appointed pursuant to Section 
5.1 of these By-Laws may be taken without a meeting if a consent in writing 
setting forth the action shall be signed by all members of the Committee 
entitled to vote upon the action and such written consent is filed with the 
records of the proceedings of the Committee. 

                                  ARTICLE VI 
                                   OFFICERS 

   SECTION 6.1. EXECUTIVE OFFICERS. The executive officers of the Trust shall 
be a Chairman, a President, one or more Vice Presidents, a Secretary and a 
Treasurer. The Chairman shall be selected from among the Trustees but none of 
the other executive officers need be a Trustee. Two or more offices, except 
those of President and any Vice President, may be held by the same person, 
but no officer shall execute, acknowledge or verify any instrument in more 
than one capacity. The executive officers of the Trust shall be elected 
annually by the Trustees and each executive officer so elected shall hold 
office until his successor is elected and has qualified. 

   SECTION 6.2. OTHER OFFICERS AND AGENTS. The Trustees may also elect one or 
more Assistant Vice Presidents, Assistant Secretaries and Assistant 
Treasurers and may elect, or may delegate to the President the power to 
appoint, such other officers and agents as the Trustees shall at any time or 
from time to time deem advisable. 

   SECTION 6.3. TERM AND REMOVAL AND VACANCIES. Each officer of the Trust 
shall hold office until his successor is elected and has qualified. Any 
officer or agent of the Trust may be removed by the Trustees whenever, in 
their judgment, the best interests of the Trust will be served thereby, but 
such removal shall be without prejudice to the contractual rights, if any, of 
the person so removed. 

   SECTION 6.4. COMPENSATION OF OFFICERS. The compensation of officers and 
agents of the Trust shall be fixed by the Trustees, or by the President to 
the extent provided by the Trustees with respect to officers appointed by the 
President. 

   SECTION 6.5. POWER AND DUTIES. All officers and agents of the Trust, as 
between themselves and the Trust, shall have such authority and perform such 
duties in the management of the Trust as may be provided in or pursuant to 
these By-Laws, or to the extent not so provided, as may be prescribed by the 
Trustees; provided, that no rights of any third party shall be affected or 
impaired by any such By-Law or resolution of the Trustees unless he has 
knowledge thereof. 


                                          6
<PAGE>

   SECTION 6.6. THE CHAIRMAN. The Chairman shall preside at all meetings of 
the Shareholders and of the Trustees, shall be a signatory on all Annual and 
Semi-Annual Reports as may be sent to shareholders, and he shall perform such 
other duties as the Trustees may from time to time prescribe. 

   SECTION 6.7. THE PRESIDENT. (a) The President shall be the chief executive 
officer of the Trust; he shall have general and active management of the 
business of the Trust, shall see that all orders and resolutions of the 
Trustees are carried into effect, and, in connection therewith, shall be 
authorized to delegate to one or more Vice Presidents such of his powers and 
duties at such times and in such manner as he may deem advisable. 

   (b) In the absence of the Chairman, the President shall preside at all 
meetings of the shareholders and the Board of Trustees; and he shall perform 
such other duties as the Board of Trustees may from time to time prescribe. 

   SECTION 6.8. THE VICE PRESIDENTS. The Vice Presidents shall be of such 
number and shall have such titles as may be determined from time to time by 
the Trustees. The Vice President, or, if there be more than one, the Vice 
Presidents in the order of their seniority as may be determined from time to 
time by the Trustees or the President, shall, in the absence or disability of 
the President, exercise the powers and perform the duties of the President, 
and he or they shall perform such other duties as the Trustees or the 
President may from time to time prescribe. 

   SECTION 6.9. THE ASSISTANT VICE PRESIDENTS. The Assistant Vice President, 
or, if there be more than one, the Assistant Vice Presidents, shall perform 
such duties and have such powers as may be assigned them from time to time by 
the Trustees or the President. 

   SECTION 6.10. THE SECRETARY. The Secretary shall attend all meetings of 
the Trustees and all meetings of the Shareholders and record all the 
proceedings of the meetings of the Shareholders and of the Trustees in a book 
to be kept for that purpose, and shall perform like duties for the standing 
committees when required. He shall give, or cause to be given, notice of all 
meetings of the Shareholders and special meetings of the Trustees, and shall 
perform such other duties and have such powers as the Trustees, or the 
President, may from time to time prescribe. He shall keep in safe custody the 
seal of the Trust and affix or cause the same to be affixed to any instrument 
requiring it, and, when so affixed, it shall be attested by his signature or 
by the signature of an Assistant Secretary. 

   SECTION 6.11. THE ASSISTANT SECRETARIES. The Assistant Secretary, or, if 
there be more than one, the Assistant Secretaries in the order determined by 
the Trustees or the President, shall, in the absence or disability of the 
Secretary, perform the duties and exercise the powers of the Secretary and 
shall perform such duties and have such other powers as the Trustees or the 
President may from time to time prescribe. 

   SECTION 6.12. THE TREASURER. The Treasurer shall be the chief financial 
officer of the Trust. He shall keep or cause to be kept full and accurate 
accounts of receipts and disbursements in books belonging to the Trust, and 
he shall render to the Trustees and the President, whenever any of them 
require it, an account of his transactions as Treasurer and of the financial 
condition of the Trust; and he shall perform such other duties as the 
Trustees, or the President, may from time to time prescribe. 

   SECTION 6.13. THE ASSISTANT TREASURERS. The Assistant Treasurer, or, if 
there shall be more than one, the Assistant Treasurers in the order 
determined by the Trustees or the President, shall, in the absence or 
disability of the Treasurer, perform the duties and exercise the powers of 
the Treasurer and shall perform such other duties and have such other powers 
as the Trustees, or the President, may from time to time prescribe. 

   SECTION 6.14. DELEGATION OF DUTIES. Whenever an officer is absent or 
disabled, or whenever for any reason the Trustees may deem it desirable, the 
Trustees may delegate the powers and duties of an officer or officers to any 
other officer or officers or to any Trustee or Trustees. 


                                          7
<PAGE>

                                 ARTICLE VII 
                         DIVIDENDS AND DISTRIBUTIONS 

   Subject to any applicable provisions of law and the Declaration, dividends 
and distributions upon the Shares may be declared at such intervals as the 
Trustees may determine, in cash, in securities or other property, or in 
Shares, from any sources permitted by law, all as the Trustees shall from 
time to time determine. 

   Inasmuch as the computation of net income and net profits from the sales 
of securities or other properties for federal income tax purposes may vary 
from the computation thereof on the records of the Trust, the Trustees shall 
have power, in their discretion, to distribute as income dividends and as 
capital gain distributions, respectively, amounts sufficient to enable the 
Trust to avoid or reduce liability for federal income taxes. 

                                 ARTICLE VIII 
                            CERTIFICATES OF SHARES 

   SECTION 8.1. CERTIFICATES OF SHARES. Certificates for Shares of each 
series or class of Shares shall be in such form and of such design as the 
Trustees shall approve, subject to the right of the Trustees to change such 
form and design at any time or from time to time, and shall be entered in the 
records of the Trust as they are issued. Each such certificate shall bear a 
distinguishing number; shall exhibit the holder's name and certify the number 
of full Shares owned by such holder; shall be signed by or in the name of the 
Trust by the President, or a Vice President, and countersigned by the 
Secretary or an Assistant Secretary or the Treasurer and an Assistant 
Treasurer of the Trust; shall be sealed with the seal; and shall contain such 
recitals as may be required by law. Where any certificate is signed by a 
Transfer Agent or by a Registrar, the signature of such officers and the seal 
may be facsimile, printed or engraved. The Trust may, at its option, 
determine not to issue a certificate or certificates to evidence Shares owned 
of record by any Shareholder. 

   In case any officer or officers who shall have signed, or whose facsimile 
signature or signatures shall appear on, any such certificate or certificates 
shall cease to be such officer or officers of the Trust, whether because of 
death, resignation or otherwise, before such certificate or certificates 
shall have been delivered by the Trust, such certificate or certificates 
shall, nevertheless, be adopted by the Trust and be issued and delivered as 
though the person or persons who signed such certificate or certificates or 
whose facsimile signature or signatures shall appear therein had not ceased 
to be such officer or officers of the Trust. 

   No certificate shall be issued for any share until such share is fully 
paid. 

   SECTION 8.2. LOST, STOLEN, DESTROYED AND MUTILATED CERTIFICATES. The 
Trustees may direct a new certificate or certificates to be issued in place 
of any certificate or certificates theretofore issued by the Trust alleged to
have been lost, stolen or destroyed, upon satisfactory proof of such loss, 
theft, or destruction; and the Trustees may, in their discretion, require the 
owner of the lost, stolen or destroyed certificate, or his legal 
representative, to give to the Trust and to such Registrar, Transfer Agent 
and/or Transfer Clerk as may be authorized or required to countersign such 
new certificate or certificates, a bond in such sum and of such type as they 
may direct, and with such surety or sureties, as they may direct, as 
indemnity against any claim that may be against them or any of them on 
account of or in connection with the alleged loss, theft or destruction of 
any such certificate. 

                                  ARTICLE IX 
                                  CUSTODIAN 

   SECTION 9.1. APPOINTMENT AND DUTIES. The Trust shall at times employ a 
bank or trust company having capital, surplus and undivided profits of at 
least five million dollars ($5,000,000) as custodian with authority as its 
agent, but subject to such restrictions, limitations and other requirements, 
if any, as may be contained in these By-Laws and the 1940 Act: 


                                          8
<PAGE>

     (1) to receive and hold the securities owned by the Trust and deliver 
    the same upon written or electronically transmitted order; 

     (2) to receive and receipt for any moneys due to the Trust and deposit 
    the same in its own banking department or elsewhere as the Trustees may 
    direct; 

     (3) to disburse such funds upon orders or vouchers; 

all upon such basis of compensation as may be agreed upon between the 
Trustees and the custodian. If so directed by a Majority Shareholder Vote, 
the custodian shall deliver and pay over all property of the Trust held by it 
as specified in such vote. 

   The Trustees may also authorize the custodian to employ one or more 
sub-custodians from time to time to perform such of the acts and services of 
the custodian and upon such terms and conditions as may be agreed upon 
between the custodian and such sub-custodian and approved by the Trustees. 

   SECTION 9.2. CENTRAL CERTIFICATE SYSTEM. Subject to such rules, 
regulations and orders as the Commission may adopt, the Trustees may direct 
the custodian to deposit all or any part of the securities owned by the Trust 
in a system for the central handling of securities established by a national 
securities exchange or a national securities association registered with the 
Commission under the Securities Exchange Act of 1934, or such other person as 
may be permitted by the Commission, or otherwise in accordance with the 1940 
Act, pursuant to which system all securities of any particular class or 
series of any issuer deposited within the system are treated as fungible and 
may be transferred or pledged by bookkeeping entry without physical delivery 
of such securities, provided that all such deposits shall be subject to 
withdrawal only upon the order of the Trust. 

                                  ARTICLE X 
                               WAIVER OF NOTICE 

   Whenever any notice of the time, place or purpose of any meeting of 
Shareholders, Trustees, or of any committee is required to be given in 
accordance with law or under the provisions of the Declaration or these 
By-Laws, a waiver thereof in writing, signed by the person or persons 
entitled to such notice and filed with the records of the meeting, whether 
before or after the holding thereof, or actual attendance at the meeting of 
Shareholders, Trustees or committee, as the case may be, in person, shall be 
deemed equivalent to the giving of such notice to such person. 

                                  ARTICLE XI 
                                MISCELLANEOUS 

   SECTION 11.1. LOCATION OF BOOKS AND RECORDS. The books and records of the 
Trust may be kept outside the Commonwealth of Massachusetts at such place or 
places as the Trustees may from time to time determine, except as otherwise 
required by law. 

   SECTION 11.2 RECORD DATE. The Trustees may fix in advance a date as the 
record date for the purpose of determining the Shareholders entitled to (i) 
receive notice of, or to vote at, any meeting of Shareholders, or (ii) 
receive payment of any dividend or the allotment of any rights, or in order 
to make a determination of Shareholders for any other proper purpose. The 
record date, in any case, shall not be more than one hundred eighty (180) 
days, and in the case of a meeting of Shareholders not less than ten (10) 
days, prior to the date on which such meeting is to be held or the date on 
which such other particular action requiring determination of Shareholders is 
to be taken, as the case may be. In the case of a meeting of Shareholders, 
the meeting date set forth in the notice to Shareholders accompanying the 
proxy statement shall be the date used for purposes of calculating the 180 
day or 10 day period, and any adjourned meeting may be reconvened without a 
change in record date. In lieu of fixing a record date, the Trustees may 
provide that the transfer books shall be closed for a stated period but not 
to exceed, in any case, twenty (20) days. If the transfer books are closed 
for the purpose of determining Shareholders entitled to notice of a vote at a 
meeting of Shareholders, such books shall be closed for at least ten (10) 
days immediately preceding the meeting. 


                                          9
<PAGE>

   SECTION 11.3. SEAL. The Trustees shall adopt a seal, which shall be in 
such form and shall have such inscription thereon as the Trustees may from 
time to time provide. The seal of the Trust may be affixed to any document, 
and the seal and its attestation may be lithographed, engraved or otherwise 
printed on any document with the same force and effect as if it had been 
imprinted and attested manually in the same manner and with the same effect 
as if done by a Massachusetts business corporation under Massachusetts law. 

   SECTION 11.4. FISCAL YEAR. The fiscal year of the Trust shall end on such 
date as the Trustees may by resolution specify, and the Trustees may by 
resolution change such date for future fiscal years at any time and from time 
to time. 

   SECTION 11.5. ORDERS FOR PAYMENT OF MONEY. All orders or instructions for 
the payment of money of the Trust, and all notes or other evidences of 
indebtedness issued in the name of the Trust, shall be signed by such officer 
or officers or such other person or persons as the Trustees may from time to 
time designate, or as may be specified in or pursuant to the agreement 
between the Trust and the bank or trust company appointed as Custodian of the 
securities and funds of the Trust. 

                                 ARTICLE XII 
                     COMPLIANCE WITH FEDERAL REGULATIONS 

   The Trustees are hereby empowered to take such action as they may deem to 
be necessary, desirable or appropriate so that the Trust is or shall be in 
compliance with any federal or state statute, rule or regulation with which 
compliance by the Trust is required. 

                                 ARTICLE XIII 
                                  AMENDMENTS 

   These By-Laws may be amended, altered, or repealed, or new By-Laws may be 
adopted, (a) by a Majority Shareholder Vote, or (b) by the Trustees; 
provided, however, that no By-Law may be amended, adopted or repealed by the 
Trustees if such amendment, adoption or repeal requires, pursuant to law, the 
Declaration, or these By-Laws, a vote of the Shareholders. The Trustees shall 
in no event adopt By-Laws which are in conflict with the Declaration, and any 
apparent inconsistency shall be construed in favor of the related provisions 
in the Declaration. 

                                 ARTICLE XIV 
                             DECLARATION OF TRUST 

   The Declaration of Trust establishing Dean Witter Precious Metals and 
Minerals Trust, dated December 27, 1989, a copy of which is on file in the 
office of the Secretary of the Commonwealth of Massachusetts, provides that 
the name Dean Witter Precious Metals and Minerals Trust refers to the 
Trustees under the Declaration collectively as Trustees, but not as 
individuals or personally; and no Trustee, Shareholder, officer, employee or 
agent of Dean Witter Precious Metals and Minerals Trust shall be held to any 
personal liability, nor shall resort be had to their private property for the 
satisfaction of any obligation or claim or otherwise, in connection with the 
affairs of said Dean Witter Precious Metals and Minerals Trust, but the Trust 
Estate only shall be liable. 


                                          10

<PAGE>

                              AMENDED AND RESTATED
                     TRANSFER AGENCY AND SERVICE AGREEMENT
 
                                      WITH
 
                             DEAN WITTER TRUST FSB
 
[open-end funds]

<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                      PAGE
                                                                      ----
<S>          <C>                                                      <C>
Article 1    Terms of Appointment...................................    1

Article 2    Fees and Expenses......................................    2
 
Article 3    Representations and Warranties of DWTFSB...............    3
 
Article 4    Representations and Warranties of the Fund.............    3
 
Article 5    Duty of Care and Indemnification.......................    3
 
Article 6    Documents and Covenants of the Fund and DWTFSB.........    4
 
Article 7    Duration and Termination of Agreement..................    5
 
Article 8    Assignment.............................................    5
 
Article 9    Affiliations...........................................    6
 
Article 10   Amendment..............................................    6
 
Article 11   Applicable Law.........................................    6
 
Article 12   Miscellaneous..........................................    6
 
Article 13   Merger of Agreement....................................    7
 
Article 14   Personal Liability.....................................    7
</TABLE>


                                       i
<PAGE>

           AMENDED AND RESTATED TRANSFER AGENCY AND SERVICE AGREEMENT

    AMENDED AND RESTATED AGREEMENT made as of the 23rd day of October, 1997 
by and between each of the Funds listed on the signature pages hereof, each 
of such Funds acting severally on its own behalf and not jointly with any of 
such other Funds (each such Fund hereinafter referred to as the "Fund"), each 
such Fund having its principal office and place of business at Two World 
Trade Center, New York, New York, 10048, and DEAN WITTER TRUST FSB 
("DWTFSB"), a federally chartered savings bank, having its principal office 
and place of business at Harborside Financial Center, Plaza Two, Jersey City, 
New Jersey 07311.
 
    WHEREAS, the Fund desires to appoint DWTFSB as its transfer agent, 
dividend disbursing agent and shareholder servicing agent and DWTFSB desires 
to accept such appointment;
 
    NOW THEREFORE, in consideration of the mutual covenants herein contained, 
the parties hereto agree as follows:
 
Article 1  TERMS OF APPOINTMENT; DUTIES OF DWTFSB
 
    1.1 Subject to the terms and conditions set forth in this Agreement, the 
Fund hereby employs and appoints DWTFSB to act as, and DWTFSB agrees to act 
as, the transfer agent for each series and class of shares of the Fund, 
whether now or hereafter authorized or issued ("Shares"), dividend disbursing 
agent and shareholder servicing agent in connection with any accumulation, 
open-account or similar plans provided to the holders of such Shares 
("Shareholders") and set out in the currently effective prospectus and 
statement of additional information ("prospectus") of the Fund, including 
without limitation any periodic investment plan or periodic withdrawal 
program.
 
    1.2 DWTFSB agrees that it will perform the following services:
 
        (a) In accordance with procedures established from time to time by    
 agreement between the Fund and DWTFSB, DWTFSB shall:
 
           (i) Receive for acceptance, orders for the purchase of Shares, and 
       promptly deliver payment and appropriate documentation therefor to the 
       custodian of the assets of the Fund (the "Custodian");
 
           (ii) Pursuant to purchase orders, issue the appropriate number of
       Shares and issue certificates therefor or hold such Shares in book form
       in the appropriate Shareholder account;
 
           (iii) Receive for acceptance redemption requests and redemption
       directions and deliver the appropriate documentation therefor to the
       Custodian;
 
           (iv) At the appropriate time as and when it receives monies paid to
       it by the Custodian with respect to any redemption, pay over or cause to
       be paid over in the appropriate manner such monies as instructed by the
       redeeming Shareholders;
 
           (v) Effect transfers of Shares by the registered owners thereof upon
       receipt of appropriate instructions;
 
           (vi) Prepare and transmit payments for dividends and distributions
       declared by the Fund;
 
           (vii) Calculate any sales charges payable by a Shareholder on
       purchases and/or redemptions of Shares of the Fund as such charges may be
       reflected in the prospectus;
 
           (viii) Maintain records of account for and advise the Fund and its
       Shareholders as to the foregoing; and
 
           (ix) Record the issuance of Shares of the Fund and maintain pursuant
       to Rule 17Ad-10(e) under the Securities Exchange Act of 1934 ("1934 Act")
       a record of the total number of Shares of the Fund which are authorized,
       based upon data provided to it by the Fund, and issued and outstanding.
       DWTFSB shall also provide to the Fund on a regular basis the total number
       of Shares that are authorized, issued and outstanding and shall notify
       the Fund in case any proposed issue of Shares by the Fund would result in
       an overissue. In case any issue of Shares


                                        1
<PAGE>

       would result in an overissue, DWTFSB shall refuse to issue such Shares
       and shall not countersign and issue any certificates requested for such
       Shares. When recording the issuance of Shares, DWTFSB shall have no
       obligation to take cognizance of any Blue Sky laws relating to the issue
       of sale of such Shares, which functions shall be the sole responsibility
       of the Fund.
 
        (b) In addition to and not in lieu of the services set forth in the
    above paragraph (a), DWTFSB shall:
 
           (i) perform all of the customary services of a transfer agent,
       dividend disbursing agent and, as relevant, shareholder servicing agent
       in connection with dividend reinvestment, accumulation, open-account or
       similar plans (including without limitation any periodic investment plan
       or periodic withdrawal program), including but not limited to,
       maintaining all Shareholder accounts, preparing Shareholder meeting
       lists, mailing proxies, receiving and tabulating proxies, mailing
       shareholder reports and prospectuses to current Shareholders, withholding
       taxes on U.S. resident and non-resident alien accounts, preparing and
       filing appropriate forms required with respect to dividends and
       distributions by federal tax authorities for all Shareholders, preparing
       and mailing confirmation forms and statements of account to Shareholders
       for all purchases and redemptions of Shares and other confirmable
       transactions in Shareholder accounts, preparing and mailing activity
       statements for Shareholders and providing Shareholder account
       information;
 
           (ii) open any and all bank accounts which may be necessary or
       appropriate in order to provide the foregoing services; and
 
           (iii) provide a system that will enable the Fund to monitor the total
       number of Shares sold in each State or other jurisdiction.
 
        (c) In addition, the Fund shall:
 
           (i) identify to DWTFSB in writing those transactions and assets to be
       treated as exempt from Blue Sky reporting for each State; and
 
           (ii) verify the inclusion on the system prior to activation of each
       State in which Fund shares may be sold and thereafter monitor the daily
       purchases and sales for shareholders in each State. The responsibility of
       DWTFSB for the Fund's status under the securities laws of any State or
       other jurisdiction is limited to the inclusion on the system of each
       State as to which the Fund has informed DWTFSB that shares may be sold in
       compliance with state securities laws and the reporting of purchases and
       sales in each such State to the Fund as provided above and as agreed from
       time to time by the Fund and DWTFSB.
 
        (d) DWTFSB shall provide such additional services and functions not
    specifically described herein as may be mutually agreed between DWTFSB and
    the Fund. Procedures applicable to such services may be established from
    time to time by agreement between the Fund and DWTFSB.
 
Article 2  FEES AND EXPENSES
 
    2.1 For performance by DWTFSB pursuant to this Agreement, each Fund 
agrees to pay DWTFSB an annual maintenance fee for each Shareholder account 
and certain transactional fees, if applicable, as set out in the respective 
fee schedule attached hereto as Schedule A. Such fees and out-of-pocket 
expenses and advances identified under Section 2.2 below may be changed from 
time to time subject to mutual written agreement between the Fund and DWTFSB.
 
    2.2 In addition to the fees paid under Section 2.1 above, the Fund agrees 
to reimburse DWTFSB for out of pocket expenses in connection with the 
services rendered by DWTFSB hereunder. In addition, any other expenses 
incurred by DWTFSB at the request or with the consent of the Fund will be 
reimbursed by the Fund.
 
    2.3 The Fund agrees to pay all fees and reimbursable expenses within a 
reasonable period of time following the mailing of the respective billing 
notice. Postage for mailing of dividends, proxies, Fund reports and other 
mailings to all Shareholder accounts shall be advanced to DWTFSB by the Fund 
upon request prior to the mailing date of such materials.


                                        2
<PAGE>

Article 3  REPRESENTATIONS AND WARRANTIES OF DWTFSB
 
    DWTFSB represents and warrants to the Fund that:
 
    3.1 It is a federally chartered savings bank whose principal office is in 
New Jersey.
 
    3.2 It is and will remain registered with the U.S. Securities and 
Exchange Commission ("SEC") as a Transfer Agent pursuant to the requirements 
of Section 17A of the 1934 Act.
 
    3.3 It is empowered under applicable laws and by its charter and By-Laws 
to enter into and perform this Agreement.
 
    3.4 All requisite corporate proceedings have been taken to authorize it to
enter into and perform this Agreement.
 
    3.5 It has and will continue to have access to the necessary facilities,
equipment and personnel to perform its duties and obligations under this
Agreement.
 
Article 4  REPRESENTATIONS AND WARRANTIES OF THE FUND
 
    The Fund represents and warrants to DWTFSB that:
 
    4.1 It is a corporation duly organized and existing and in good standing
under the laws of Delaware or Maryland or a trust duly organized and existing
and in good standing under the laws of Massachusetts, as the case may be.
 
    4.2 It is empowered under applicable laws and by its Articles of
Incorporation or Declaration of Trust, as the case may be, and under its By-Laws
to enter into and perform this Agreement.
 
    4.3 All corporate proceedings necessary to authorize it to enter into and
perform this Agreement have been taken.
 
    4.4 It is an investment company registered with the SEC under the Investment
Company Act of 1940, as amended (the "1940 Act").
 
    4.5 A registration statement under the Securities Act of 1933 (the "1933
Act") is currently effective and will remain effective, and appropriate state
securities law filings have been made and will continue to be made, with respect
to all Shares of the Fund being offered for sale.
 
Article 5  DUTY OF CARE AND INDEMNIFICATION
 
    5.1 DWTFSB shall not be responsible for, and the Fund shall indemnify and
hold DWTFSB harmless from and against, any and all losses, damages, costs,
charges, counsel fees, payments, expenses and liability arising out of or
attributable to:
 
        (a) All actions of DWTFSB or its agents or subcontractors required to be
    taken pursuant to this Agreement, provided that such actions are taken in
    good faith and without negligence or willful misconduct.
 
        (b) The Fund's refusal or failure to comply with the terms of this
    Agreement, or which arise out of the Fund's lack of good faith, negligence
    or willful misconduct or which arise out of breach of any representation or
    warranty of the Fund hereunder.
 
        (c) The reliance on or use by DWTFSB or its agents or subcontractors of
    information, records and documents which (i) are received by DWTFSB or its
    agents or subcontractors and furnished to it by or on behalf of the Fund,
    and (ii) have been prepared and/or maintained by the Fund or any other
    person or firm on behalf of the Fund.
 
        (d) The reliance on, or the carrying out by DWTFSB or its agents or
    subcontractors of, any instructions or requests of the Fund.
 
        (e) The offer or sale of Shares in violation of any requirement under
    the federal securities laws or regulations or the securities or Blue Sky
    laws of any State or other jurisdiction that notice of


                                        3
<PAGE>

    offering of such Shares in such State or other jurisdiction or in violation
    of any stop order or other determination or ruling by any federal agency or
    any State or other jurisdiction with respect to the offer or sale of such
    Shares in such State or other jurisdiction.
 
    5.2 DWTFSB shall indemnify and hold the Fund harmless from or against any 
and all losses, damages, costs, charges, counsel fees, payments, expenses and 
liability arising out of or attributable to any action or failure or omission 
to act by DWTFSB as a result of the lack of good faith, negligence or willful 
misconduct of DWTFSB, its officers, employees or agents.
 
    5.3 At any time, DWTFSB may apply to any officer of the Fund for 
instructions, and may consult with legal counsel to the Fund, with respect to 
any matter arising in connection with the services to be performed by DWTFSB 
under this Agreement, and DWTFSB and its agents or subcontractors shall not 
be liable and shall be indemnified by the Fund for any action taken or 
omitted by it in reliance upon such instructions or upon the opinion of such 
counsel. DWTFSB, its agents and subcontractors shall be protected and 
indemnified in acting upon any paper or document furnished by or on behalf of 
the Fund, reasonably believed to be genuine and to have been signed by the 
proper person or persons, or upon any instruction, information, data, records 
or documents provided to DWTFSB or its agents or subcontractors by machine 
readable input, telex, CRT data entry or other similar means authorized by 
the Fund, and shall not be held to have notice of any change of authority of 
any person, until receipt of written notice thereof from the Fund. DWTFSB, 
its agents and subcontractors shall also be protected and indemnified in 
recognizing stock certificates which are reasonably believed to bear the 
proper manual or facsimile signature of the officers of the Fund, and the 
proper countersignature of any former transfer agent or registrar, or of a 
co-transfer agent or co-registrar.
 
    5.4 In the event either party is unable to perform its obligations under 
the terms of this Agreement because of acts of God, strikes, equipment or 
transmission failure or damage reasonably beyond its control, or other causes 
reasonably beyond its control, such party shall not be liable for damages to 
the other for any damages resulting from such failure to perform or otherwise 
from such causes.
 
    5.5 Neither party to this Agreement shall be liable to the other party 
for consequential damages under any provision of this Agreement or for any 
act or failure to act hereunder.
 
    5.6 In order that the indemnification provisions contained in this 
Article 5 shall apply, upon the assertion of a claim for which either party 
may be required to indemnify the other, the party seeking indemnification 
shall promptly notify the other party of such assertion, and shall keep the 
other party advised with respect to all developments concerning such claim. 
The party who may be required to indemnify shall have the option to 
participate with the party seeking indemnification in the defense of such 
claim. The party seeking indemnification shall in no case confess any claim 
or make any compromise in any case in which the other party may be required 
to indemnify it except with the other party's prior written consent.
 
Article 6  DOCUMENTS AND COVENANTS OF THE FUND AND DWTFSB
 
    6.1 The Fund shall promptly furnish to DWTFSB the following, unless 
previously furnished to Dean Witter Trust Company, the prior transfer agent 
of the Fund:
 
        (a) If a corporation:
 
           (i) A certified copy of the resolution of the Board of Directors of
       the Fund authorizing the appointment of DWTFSB and the execution and
       delivery of this Agreement;
 
           (ii) A certified copy of the Articles of Incorporation and By-Laws of
       the Fund and all amendments thereto;
 
           (iii) Certified copies of each vote of the Board of Directors
       designating persons authorized to give instructions on behalf of the Fund
       and signature cards bearing the signature of any officer of the Fund or
       any other person authorized to sign written instructions on behalf of the
       Fund;
 
           (iv) A specimen of the certificate for Shares of the Fund in the form
       approved by the Board of Directors, with a certificate of the Secretary
       of the Fund as to such approval;


                                        4
<PAGE>

        (b) If a business trust:
 
           (i) A certified copy of the resolution of the Board of Trustees of
       the Fund authorizing the appointment of DWTFSB and the execution and
       delivery of this Agreement;
 
           (ii) A certified copy of the Declaration of Trust and By-Laws of the
       Fund and all amendments thereto;
 
           (iii) Certified copies of each vote of the Board of Trustees
       designating persons authorized to give instructions on behalf of the Fund
       and signature cards bearing the signature of any officer of the Fund or
       any other person authorized to sign written instructions on behalf of the
       Fund;
 
           (iv) A specimen of the certificate for Shares of the Fund in the form
       approved by the Board of Trustees, with a certificate of the Secretary of
       the Fund as to such approval;
 
        (c) The current registration statements and any amendments and
    supplements thereto filed with the SEC pursuant to the requirements of the
    1933 Act or the 1940 Act;
 
        (d) All account application forms or other documents relating to
    Shareholder accounts and/or relating to any plan, program or service offered
    or to be offered by the Fund; and
 
        (e) Such other certificates, documents or opinions as DWTFSB deems to be
    appropriate or necessary for the proper performance of its duties.
 
    6.2 DWTFSB hereby agrees to establish and maintain facilities and 
procedures reasonably acceptable to the Fund for safekeeping of Share 
certificates, check forms and facsimile signature imprinting devices, if any; 
and for the preparation or use, and for keeping account of, such 
certificates, forms and devices.
 
    6.3 DWTFSB shall prepare and keep records relating to the services to be 
performed hereunder, in the form and manner as it may deem advisable and as 
required by applicable laws and regulations. To the extent required by 
Section 31 of the 1940 Act, and the rules and regulations thereunder, DWTFSB 
agrees that all such records prepared or maintained by DWTFSB relating to the 
services performed by DWTFSB hereunder are the property of the Fund and will 
be preserved, maintained and made available in accordance with such Section 
31 of the 1940 Act, and the rules and regulations thereunder, and will be 
surrendered promptly to the Fund on and in accordance with its request.
 
    6.4 DWTFSB and the Fund agree that all books, records, information and 
data pertaining to the business of the other party which are exchanged or 
received pursuant to the negotiation or the carrying out of this Agreement 
shall remain confidential and shall not be voluntarily disclosed to any other 
person except as may be required by law or with the prior consent of DWTFSB 
and the Fund.
 
    6.5 In case of any request or demands for the inspection of the 
Shareholder records of the Fund, DWTFSB will endeavor to notify the Fund and 
to secure instructions from an authorized officer of the Fund as to such 
inspection. DWTFSB reserves the right, however, to exhibit the Shareholder 
records to any person whenever it is advised by its counsel that it may be 
held liable for the failure to exhibit the Shareholder records to such person.
 
Article 7  DURATION AND TERMINATION OF AGREEMENT
 
    7.1 This Agreement shall remain in full force and effect until August 1, 
2000 and from year-to-year thereafter unless terminated by either party as 
provided in Section 7.2 hereof.
 
    7.2 This Agreement may be terminated by the Fund on 60 days written 
notice, and by DWTFSB on 90 days written notice, to the other party without 
payment of any penalty.
 
    7.3 Should the Fund exercise its right to terminate, all out-of-pocket 
expenses associated with the movement of records and other materials will be 
borne by the Fund. Additionally, DWTFSB reserves the right to charge for any 
other reasonable fees and expenses associated with such termination.
 
Article 8  ASSIGNMENT
 
    8.1 Except as provided in Section 8.3 below, neither this Agreement nor 
any rights or obligations hereunder may be assigned by either party without 
the written consent of the other party.


                                        5
<PAGE>

    8.2 This Agreement shall inure to the benefit of and be binding upon the 
parties and their respective permitted successors and assigns.
 
    8.3 DWTFSB may, in its sole discretion and without further consent by the 
Fund, subcontract, in whole or in part, for the performance of its 
obligations and duties hereunder with any person or entity including but not 
limited to companies which are affiliated with DWTFSB; PROVIDED, HOWEVER, 
that such person or entity has and maintains the qualifications, if any, 
required to perform such obligations and duties, and that DWTFSB shall be as 
fully responsible to the Fund for the acts and omissions of any agent or 
subcontractor as it is for its own acts or omissions under this Agreement.
 
Article 9  AFFILIATIONS
 
    9.1 DWTFSB may now or hereafter, without the consent of or notice to the 
Fund, function as transfer agent and/or shareholder servicing agent for any 
other investment company registered with the SEC under the 1940 Act and for 
any other issuer, including without limitation any investment company whose 
adviser, administrator, sponsor or principal underwriter is or may become 
affiliated with Morgan Stanley, Dean Witter, Discover & Co. or any of its 
direct or indirect subsidiaries or affiliates.
 
    9.2 It is understood and agreed that the Directors or Trustees (as the 
case may be), officers, employees, agents and shareholders of the Fund, and 
the directors, officers, employees, agents and shareholders of the Fund's 
investment adviser and/or distributor, are or may be interested in DWTFSB as 
directors, officers, employees, agents and shareholders or otherwise, and 
that the directors, officers, employees, agents and shareholders of DWTFSB 
may be interested in the Fund as Directors or Trustees (as the case may be), 
officers, employees, agents and shareholders or otherwise, or in the 
investment adviser and/or distributor as directors, officers, employees, 
agents, shareholders or otherwise.
 
Article 10  AMENDMENT
 
    10.1 This Agreement may be amended or modified by a written agreement 
executed by both parties and authorized or approved by a resolution of the 
Board of Directors or the Board of Trustees (as the case may be) of the Fund.
 
Article 11  APPLICABLE LAW
 
    11.1 This Agreement shall be construed and the provisions thereof 
interpreted under and in accordance with the laws of the State of New York.
 
Article 12  MISCELLANEOUS
 
    12.1 In the event that one or more additional investment companies 
managed or administered by Dean Witter InterCapital Inc. or any of its 
affiliates ("Additional Funds") desires to retain DWTFSB to act as transfer 
agent, dividend disbursing agent and/or shareholder servicing agent, and 
DWTFSB desires to render such services, such services shall be provided 
pursuant to a letter agreement, substantially in the form of Exhibit A 
hereto, between DWTFSB and each Additional Fund.
 
    12.2 In the event of an alleged loss or destruction of any Share 
certificate, no new certificate shall be issued in lieu thereof, unless there 
shall first be furnished to DWTFSB an affidavit of loss or non-receipt by the 
holder of Shares with respect to which a certificate has been lost or 
destroyed, supported by an appropriate bond satisfactory to DWTFSB and the 
Fund issued by a surety company satisfactory to DWTFSB, except that DWTFSB 
may accept an affidavit of loss and indemnity agreement executed by the 
registered holder (or legal representative) without surety in such form as 
DWTFSB deems appropriate indemnifying DWTFSB and the Fund for the issuance of 
a replacement certificate, in cases where the alleged loss is in the amount 
of $1,000 or less.
 
    12.3 In the event that any check or other order for payment of money on 
the account of any Shareholder or new investor is returned unpaid for any 
reason, DWTFSB will (a) give prompt notification to the Fund's distributor 
("Distributor") (or to the Fund if the Fund acts as its own distributor) of 
such non-payment; and (b) take such other action, including imposition of a 
reasonable processing or handling fee, as DWTFSB may, in its sole discretion, 
deem appropriate or as the Fund and, if applicable, the Distributor may 
instruct DWTFSB.


                                        6
<PAGE>

    12.4 Any notice or other instrument authorized or required by this 
Agreement to be given in writing to the Fund or to DWTFSB shall be 
sufficiently given if addressed to that party and received by it at its 
office set forth below or at such other place as it may from time to time 
designate in writing.
 
To the Fund:
 
[Name of Fund]
Two World Trade Center
New York, New York 10048
 
Attention: General Counsel
 
To DWTFSB:
 
Dean Witter Trust FSB
Harborside Financial Center
Plaza Two
Jersey City, New Jersey 07311
 
Attention: President
 
Article 13  MERGER OF AGREEMENT
 
    13.1 This Agreement constitutes the entire agreement between the parties 
hereto and supersedes any prior agreement with respect to the subject matter 
hereof whether oral or written.
 
Article 14  PERSONAL LIABILITY
 
    14.1 In the case of a Fund organized as a Massachusetts business trust, a 
copy of the Declaration of Trust of the Fund is on file with the Secretary of 
The Commonwealth of Massachusetts, and notice is hereby given that this 
instrument is executed on behalf of the Board of Trustees of the Fund as 
Trustees and not individually and that the obligations of this instrument are 
not binding upon any of the Trustees or shareholders individually but are 
binding only upon the assets and property of the Fund; provided, however, 
that the Declaration of Trust of the Fund provides that the assets of a 
particular Series of the Fund shall under no circumstances be charged with 
liabilities attributable to any other Series of the Fund and that all persons 
extending credit to, or contracting with or having any claim against, a 
particular Series of the Fund shall look only to the assets of that 
particular Series for payment of such credit, contract or claim.
 
    IN WITNESS WHEREOF, the parties hereto have caused this Amended and Restated
Agreement to be executed in their names and on their behalf by and through their
duly authorized officers, as of the day and year first above written.
 
DEAN WITTER FUNDS
 
     MONEY MARKET FUNDS
 
 1.  Dean Witter Liquid Asset Fund Inc.
 2.  Active Assets Money Trust
 3.  Dean Witter U.S. Government Money Market Trust
 4.  Active Assets Government Securities Trust
 5.  Dean Witter Tax-Free Daily Income Trust
 6.  Active Assets Tax-Free Trust
 7.  Dean Witter California Tax-Free Daily Income Trust
 8.  Dean Witter New York Municipal Money Market Trust
 9.  Active Assets California Tax-Free Trust
 
     EQUITY FUNDS
 
10.  Dean Witter American Value Fund
11.  Dean Witter Mid-Cap Growth Fund
12.  Dean Witter Dividend Growth Securities Inc.


                                        7
<PAGE>

13.  Dean Witter Capital Growth Securities
14.  Dean Witter Global Dividend Growth Securities
15.  Dean Witter Income Builder Fund
16.  Dean Witter Natural Resource Development Securities Inc.
17.  Dean Witter Precious Metals and Minerals Trust
18.  Dean Witter Developing Growth Securities Trust
19.  Dean Witter Health Sciences Trust
20.  Dean Witter Capital Appreciation Fund
21.  Dean Witter Information Fund
22.  Dean Witter Value-Added Market Series
23.  Dean Witter World Wide Investment Trust
24.  Dean Witter European Growth Fund Inc.
25.  Dean Witter Pacific Growth Fund Inc.
26.  Dean Witter International SmallCap Fund
27.  Dean Witter Japan Fund
28.  Dean Witter Utilities Fund
29.  Dean Witter Global Utilities Fund
30.  Dean Witter Special Value Fund
31.  Dean Witter Financial Services Trust
32.  Dean Witter Market Leader Trust
33.  Dean Witter Managers' Select Fund
34.  Dean Witter Fund of Funds
35.  Dean Witter S&P 500 Index Fund

     BALANCED FUNDS

36.  Dean Witter Balanced Growth Fund
37.  Dean Witter Balanced Income Trust

     ASSET ALLOCATION FUNDS

38.  Dean Witter Strategist Fund
39.  Dean Witter Global Asset Allocation Fund
  
     FIXED INCOME FUNDS
 
40.  Dean Witter High Yield Securities Inc.
41.  Dean Witter High Income Securities
42.  Dean Witter Convertible Securities Trust
43.  Dean Witter Intermediate Income Securities
44.  Dean Witter Short-Term Bond Fund
45.  Dean Witter World Wide Income Trust
46.  Dean Witter Global Short-Term Income Fund Inc.
47.  Dean Witter Diversified Income Trust
48.  Dean Witter U.S. Government Securities Trust
49.  Dean Witter Federal Securities Trust
50.  Dean Witter Short-Term U.S. Treasury Trust
51.  Dean Witter Intermediate Term U.S. Treasury Trust
52.  Dean Witter Tax-Exempt Securities Trust
53.  Dean Witter National Municipal Trust
55.  Dean Witter Limited Term Municipal Trust
55.  Dean Witter California Tax-Free Income Fund
56.  Dean Witter New York Tax-Free Income Fund
57.  Dean Witter Hawaii Municipal Trust
58.  Dean Witter Multi-State Municipal Series Trust
59.  Dean Witter Select Municipal Reinvestment Fund


                                          8
<PAGE>

     SPECIAL PURPOSE FUNDS

60.  Dean Witter Retirement Series
61.  Dean Witter Variable Investment Series
62.  Dean Witter Select Dimensions Investment Series

     TCW/DW FUNDS

63.  TCW/DW Core Equity Trust
64.  TCW/DW North American Government Income Trust
65.  TCW/DW Latin American Growth Fund
66.  TCW/DW Income and Growth Fund
67.  TCW/DW Small Cap Growth Fund
68.  TCW/DW Balanced Fund
69.  TCW/DW Total Return Trust
70.  TCW/DW Global Telecom Trust
71.  TCW/DW Strategic Income Trust
72.  TCW/DW Mid-Cap Equity Trust
 
                                          By: __________________________________
                                              Barry Fink
                                              Vice President and General Counsel
 
ATTEST:
 
_____________________________
Assistant Secretary
 
                                          DEAN WITTER TRUST FSB
 
                                          By: __________________________________
                                              John Van Heuvelen
                                              President
 
ATTEST:
 
_____________________________
Executive Vice President


                                        9

<PAGE>

                                   EXHIBIT A
 
Dean Witter Trust FSB
Harborside Financial Center
Plaza Two
Jersey City, NJ 07311
 
Gentlemen:
 
    The undersigned, (INSET NAME OF INVESTMENT COMPANY) a (Massachusetts 
business trust/Maryland corporation) (the "Fund"), desires to employ and 
appoint Dean Witter Trust FSB ("DWTFSB") to act as transfer agent for each 
series and class of shares of the Fund, whether now or hereafter authorized 
or issued ("Shares"), dividend disbursing agent and shareholder servicing 
agent, registrar and agent in connection with any accumulation, open-account 
or similar plan provided to the holders of Shares, including without 
limitation any periodic investment plan or periodic withdrawal plan.
 
    The Fund hereby agrees that, in consideration for the payment by the Fund 
to DWTFSB of fees as set out in the fee schedule attached hereto as Schedule 
A, DWTFSB shall provide such services to the Fund pursuant to the terms and 
conditions set forth in the Transfer Agency and Service Agreement annexed 
hereto, as if the Fund was a signatory thereto.
 
    Please indicate DWTFSB's acceptance of employment and appointment by the 
Fund in the capacities set forth above by so indicating in the space provided 
below.
 
                                         Very truly yours,
 
                                         (NAME OF FUND)
 
                                         By:  _________________________________
                                              Barry Fink
                                              Vice President and General Counsel
 
ACCEPTED AND AGREED TO:
 
DEAN WITTER TRUST FSB
 
By: __________________________________
 
Its: _________________________________
 
Date: ________________________________


                                       10
<PAGE>

                                  SCHEDULE A

Fund:    Dean Witter Precious Metals and Minerals Trust

Fees:    (1) Annual maintenance fee of $12.65 per shareholder account, 
         payable monthly.

         (2) A fee equal to 1/12 fo the fee set forth in (1) above, for 
         providing Forms 1099 for accounts closed during the year, payable 
         following the end of the calendar year.

         (3) Out-of-pocket expenses in accordance with Section 2.2 of the 
         Agreement 

         (4) Fees for additional services not set forth in this Agreement 
         shall be as negotiated between the parties.


f:\schedA\36

<PAGE>


                                                                      EXHIBIT 11



CONSENT OF INDEPENDENT ACCOUNTANTS

We hereby consent to the use in the Statement of Additional Information 
constituting part of this Post-Effective Amendment No. 9 to the Registration 
Statement on Form N-1A (the "Registration Statement") of our report dated 
December 5, 1997, relating to the financial statements and financial 
highlights of Dean Witter Precious Metals and Minerals Trust, which appears 
in such Statement of Additional Information, and to the incorporation by 
reference of our report into the Prospectus which constitutes part of this 
Registration Statement. We also consent to the reference to us under the 
heading "Financial Highlights" in such Prospectus and to the references to us 
under the headings "Independent Accountants" and "Experts" in the Statement of 
Additional Information.


/s/ PRICE WATERHOUSE LLP
PRICE WATERHOUSE LLP
1177 Avenue of the Americas
New York, New York 10036
December 19, 1997





<PAGE>
                 SCHEDULE FOR COMPUTATIONS OF PERFORMANCE QUOTATIONS
                         PRECIOUS METALS & MINERALS TRUST (A)



(A) AVERAGE ANNUAL TOTAL RETURNS (I.E. STANDARDIZED COMPUTATIONS)

                     _                              _
                    |        ______________________  |
FORMULA:            |       |                        |
                    |  /\ n |      ERV               |
         T  =       |    \  | -------------          |  - 1
                    |     \ |       P                |
                    |      \|                        |
                    |_                              _|

         T = AVERAGE ANNUAL TOTAL RETURN
         n = NUMBER OF YEARS
         ERV = ENDING REDEEMABLE VALUE
         P = INITIAL INVESTMENT

                                                           (A)
  $1,000      ERV AS OF    AGGREGATE       NUMBER OF      AVERAGE ANNUAL
INVESTED - P  31-Oct-97    TOTAL RETURN    YEARS - n      TOTAL RETURN - T
- ------------  ----------   ------------    -----------    ----------------

28-Jul-97        $817.60       (18.24%)           0.26                  NA


(B) AVERAGE ANNUAL TOTAL RETURNS WITHOUT DEDUCTION FOR APPLICABLE
    SALES CHARGE  (NON STANDARD COMPUTATIONS)


(C) TOTAL RETURN WITHOUT DEDUCTION FOR APPLICABLE SALES CHARGE
    (NON STANDARD COMPUTATIONS)

                     _                              _
                    |        ______________________  |
FORMULA:            |       |                        |
                    |  /\ n |      EV                |
         t  =       |    \  | -------------          |  - 1
                    |     \ |       P                |
                    |      \|                        |
                    |_                              _|

                    EV
         TR  =  ----------     - 1
                    P


    t = AVERAGE ANNUAL TOTAL RETURN
        (NO DEDUCTION FOR APPLICABLE SALES CHARGE)
    n = NUMBER OF YEARS
    EV = ENDING VALUE (NO DEDUCTION FOR APPLICABLE SALES CHARGE)
    P = INITIAL INVESTMENT
    TR = TOTAL RETURN (NO DEDUCTION FOR APPLICABLE SALES CHARGE)

                              (C)                             (B)
  $1,000      EV AS OF        TOTAL            NUMBER OF      AVERAGE ANNUAL
INVESTED - P   31-Oct-97      RETURN - TR      YEARS - n      TOTAL RETURN - t
- ------------  ----------      ------------     ------------   ----------------

  28-Jul-97      $862.90        (13.71%)             0.26              NA



(D)      GROWTH OF $10,000*
(E)      GROWTH OF $50,000*
(F)      GROWTH OF $100,000*

FORMULA: G= (TR+1)*P
         G= GROWTH OF INITIAL INVESTMENT
         P= INITIAL INVESTMENT
         TR= TOTAL RETURN SINCE INCEPTION

<TABLE>
<CAPTION>


               TOTAL            (D)   GROWTH OF          (E)   GROWTH OF         (D)   GROWTH OF
INVESTED - P   RETURN - TR      $10,000 INVESTMENT-G     $50,000 INVESTMENT - G  $100,000 INVESTMENT - G
- ------------   --------------   ----------------------   ----------------------  -----------------------
<S>            <C>              <C>                      <C>                     <C>
  28-Jul-97           (13.71)                $8,176                  $41,419                 $83,701



</TABLE>

*INITIAL INVESTMENT $9,475, $48,000 & 97,000 RESPECTIVELY REFLECTS A 5.25%,
 4.00% & 3.00% SALES CHARGE


<PAGE>

                 SCHEDULE FOR COMPUTATIONS OF PERFORMANCE QUOTATIONS
                        PRECIOUS METALS AND MINERALS TRUST (B)




(A) AVERAGE ANNUAL TOTAL RETURNS (I.E. STANDARDIZED COMPUTATIONS)

                     _                              _
                    |        ______________________  |
FORMULA:            |       |                        |
                    |  /\ n |      ERV               |
         T  =       |    \  | -------------          |  - 1
                    |     \ |       P                |
                    |      \|                        |
                    |_                              _|

         T = AVERAGE ANNUAL TOTAL RETURN
         n = NUMBER OF YEARS
         ERV = ENDING REDEEMABLE VALUE
         P = INITIAL INVESTMENT

                                                          (A)
  $1,000       ERV AS OF   AGGREGATE        NUMBER OF     AVERAGE ANNUAL
INVESTED - P   31-Oct-97   TOTAL RETURN     YEARS - n     TOTAL RETURN - T
- ------------   ---------   ------------     ----------    ----------------

31-Oct-96        $636.40       (36.36%)           1.00         (36.36%)

31-Oct-92        $965.60        (3.44%)           5.00          (0.70%)

06-Aug-90        $784.80       (21.52%)           7.24          (3.29%)


(B) AVERAGE ANNUAL TOTAL RETURNS WITHOUT DEDUCTION FOR APPLICABLE
    SALES CHARGE  (NON STANDARD COMPUTATIONS)


(C) TOTAL RETURN WITHOUT DEDUCTION FOR APPLICABLE SALES CHARGE
    (NON STANDARD COMPUTATIONS)



                     _                              _
                    |        ______________________  |
FORMULA:            |       |                        |
                    |  /\ n |      EV                |
         t  =       |    \  | -------------          |  - 1
                    |     \ |       P                |
                    |      \|                        |
                    |_                              _|

                    EV
         TR  =  ----------     - 1
                    P



    t = AVERAGE ANNUAL TOTAL RETURN
        (NO DEDUCTION FOR APPLICABLE SALES CHARGE)
    n = NUMBER OF YEARS
    EV = ENDING VALUE (NO DEDUCTION FOR APPLICABLE SALES CHARGE)
    P = INITIAL INVESTMENT
    TR = TOTAL RETURN (NO DEDUCTION FOR APPLICABLE SALES CHARGE)


                               (C)                             (B)
  $1,000       EV AS OF       TOTAL              NUMBER OF     AVERAGE ANNUAL
INVESTED - P   31-Oct-97      RETURN - TR        YEARS - n     TOTAL RETURN - t
- ------------   ---------      ------------       ----------    ----------------

31-Oct-96        $667.10          (33.29%)              1.00        (33.29%)

31-Oct-92        $983.00           (1.70%)              5.00         (0.34%)

06-Aug-90        $784.80          (21.52%)              7.24         (3.29%)


(D)      GROWTH OF $10,000
(E)      GROWTH OF $50,000
(F)      GROWTH OF $100,000

FORMULA: G= (TR+1)*P
         G= GROWTH OF INITIAL INVESTMENT
         P= INITIAL INVESTMENT
         TR= TOTAL RETURN SINCE INCEPTION


<TABLE>
<CAPTION>


                                (D)                      (E)                     (F)
$10,000         TOTAL           GROWTH OF                GROWTH OF               GROWTH OF
INVESTED - P    RETURN - TR     $10,000 INVESTMENT - G   $50,000 INVESTMENT - G  $100,000 INVESTMENT - G
- ------------    -------------   ----------------------   ----------------------  -----------------------
<S>             <C>             <C>                      <C>                     <C>
  06-Aug-90         (21.52)                  $7,848                  $39,240                $78,480



</TABLE>


<PAGE>


                 SCHEDULE FOR COMPUTATIONS OF PERFORMANCE QUOTATIONS
                         PRECIOUS METALS & MINERALS TRUST (C)




(A) AVERAGE ANNUAL TOTAL RETURNS (I.E. STANDARDIZED COMPUTATIONS)

                     _                              _
                    |        ______________________  |
FORMULA:            |       |                        |
                    |  /\ n |      ERV               |
         T  =       |    \  | -------------          |  - 1
                    |     \ |       P                |
                    |      \|                        |
                    |_                              _|

         T = AVERAGE ANNUAL TOTAL RETURN
         n = NUMBER OF YEARS
         ERV = ENDING REDEEMABLE VALUE
         P = INITIAL INVESTMENT


                                                          (A)
  $1,000       ERV AS OF   AGGREGATE        NUMBER OF     AVERAGE ANNUAL
INVESTED - P   31-Oct-97   TOTAL RETURN     YEARS - n     TOTAL RETURN - T
- ------------   ---------   ------------     ----------    ----------------

  28-Jul-97      $851.80       (14.82%)         0.26                 NA


(B) AVERAGE ANNUAL TOTAL RETURNS WITHOUT DEDUCTION FOR APPLICABLE
    SALES CHARGE  (NON STANDARD COMPUTATIONS)


(C) TOTAL RETURN WITHOUT DEDUCTION FOR APPLICABLE SALES CHARGE
    (NON STANDARD COMPUTATIONS)


                     _                              _
                    |        ______________________  |
FORMULA:            |       |                        |
                    |  /\ n |      EV                |
         t  =       |    \  | -------------          |  - 1
                    |     \ |       P                |
                    |      \|                        |
                    |_                              _|

                    EV
         TR  =  ----------     - 1
                    P


    t = AVERAGE ANNUAL TOTAL RETURN
        (NO DEDUCTION FOR APPLICABLE SALES CHARGE)
    n = NUMBER OF YEARS
    EV = ENDING VALUE (NO DEDUCTION FOR APPLICABLE SALES CHARGE)
    P = INITIAL INVESTMENT
    TR = TOTAL RETURN (NO DEDUCTION FOR APPLICABLE SALES CHARGE)

                               (C)                            (B)
  $1,000       EV AS OF       TOTAL            NUMBER OF      AVERAGE ANNUAL
INVESTED - P   31-Oct-97      RETURN - TR      YEARS - n      TOTAL RETURN - t
- ------------   ---------      -----------      -----------    ----------------

28-Jul-97        $860.40          (13.96%)            0.26              NA


(D)      GROWTH OF $10,000
(E)      GROWTH OF $50,000
(F)      GROWTH OF $100,000

FORMULA: G= (TR+1)*P
         G= GROWTH OF INITIAL INVESTMENT
         P= INITIAL INVESTMENT
         TR= TOTAL RETURN SINCE INCEPTION


<TABLE>
<CAPTION>
 

                  TOTAL           (D)   GROWTH OF        (E)   GROWTH OF         (D)   GROWTH OF
INVESTED - P      RETURN - TR     $10,000 INVESTMENT-G   $50,000 INVESTMENT - G  $100,000 INVESTMENT - G
- ------------      -----------     --------------------   ----------------------  -----------------------
<S>               <C>             <C>                    <C>                     <C>
28-Jul-97             (13.96)                $8,604                  $43,020              $86,040

 

</TABLE>


<PAGE>


                 SCHEDULE FOR COMPUTATIONS OF PERFORMANCE QUOTATIONS
                        PRECIOUS METALS AND MINERALS TRUST (D)



(A) AVERAGE ANNUAL TOTAL RETURNS (NO LOAD FUND)

(B) TOTAL RETURN (NO LOAD FUND)

                     _                              _
                    |        ______________________  |
FORMULA:            |       |                        |
                    |  /\ n |      EV                |
         t  =       |    \  | -------------          |  - 1
                    |     \ |       P                |
                    |      \|                        |
                    |_                              _|

                    EV
         TR  =  ----------     - 1
                    P


    t = AVERAGE ANNUAL COMPOUND RETURN
    n = NUMBER OF YEARS
    EV = ENDING VALUE
    P = INITIAL INVESTMENT
    TR = TOTAL RETURN



<TABLE>
<CAPTION>
 

                                          (B)                                         (A)
  $1,000          EV AS OF               TOTAL                   NUMBER OF           AVERAGE ANNUAL
INVESTED - P      31-Oct-97              RETURN - TR             YEARS - n           COMPOUND RETURN - t
- ------------      -----------            -------------           --------------      -------------------
<S>               <C>                    <C>                     <C>                 <C>

28-Jul-97             $862.90               (13.71%)                    0.26                      NA

 

</TABLE>

(C)      GROWTH OF $10,000
(D)      GROWTH OF $50,000
(E)      GROWTH OF $100,000


FORMULA: G= (TR+1)*P
         G= GROWTH OF INITIAL INVESTMENT
         P= INITIAL INVESTMENT
         TR= TOTAL RETURN SINCE INCEPTION

<TABLE>
<CAPTION>
 

$10,000           TOTAL          (C)   GROWTH OF          (D)   GROWTH OF         (E)   GROWTH OF
INVESTED - P      RETURN - TR    $10,000 INVESTMENT- G    $50,000 INVESTMENT- G   $100,000 INVESTMENT- G
- ------------      -----------    ---------------------    ---------------------   ----------------------
<S>               <C>            <C>                      <C>                     <C>
28-Jul-97             (13.71)                $8,629                   $43,145                $86,290
 

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<SERIES>
   <NUMBER> 01
   <NAME> PRECIOUS METALS & MINERALS CLASS A
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          OCT-31-1997
<PERIOD-END>                               OCT-31-1997
<INVESTMENTS-AT-COST>                       47,939,143
<INVESTMENTS-AT-VALUE>                      40,078,903
<RECEIVABLES>                                   73,789
<ASSETS-OTHER>                                  58,964
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              40,211,656
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    1,731,362
<TOTAL-LIABILITIES>                          1,731,362
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    56,867,210
<SHARES-COMMON-STOCK>                            4,703
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                    (191,129)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                   (10,335,412)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   (7,860,375)
<NET-ASSETS>                                    32,257
<DIVIDEND-INCOME>                              339,125
<INTEREST-INCOME>                              292,931
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               1,207,432
<NET-INVESTMENT-INCOME>                      (575,376)
<REALIZED-GAINS-CURRENT>                   (9,101,223)
<APPREC-INCREASE-CURRENT>                  (9,193,959)
<NET-CHANGE-FROM-OPS>                       18,870,558
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          4,703
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                    (22,360,948)
<ACCUMULATED-NII-PRIOR>                      (567,810)
<ACCUMULATED-GAINS-PRIOR>                    3,502,118
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          408,911
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              1,207,432
<AVERAGE-NET-ASSETS>                            21,082
<PER-SHARE-NAV-BEGIN>                             7.95
<PER-SHARE-NII>                                      0
<PER-SHARE-GAIN-APPREC>                         (1.09)
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               6.86
<EXPENSE-RATIO>                                   1.61
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<SERIES>
   <NUMBER> 02
   <NAME> PRECIOUS METALS AND MINERALS CLASS B
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          OCT-31-1997
<PERIOD-END>                               OCT-31-1997
<INVESTMENTS-AT-COST>                       47,939,143
<INVESTMENTS-AT-VALUE>                      40,078,903
<RECEIVABLES>                                   73,789
<ASSETS-OTHER>                                  58,964
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              40,211,656
<PAYABLE-FOR-SECURITIES>                     1,676,995
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       54,367
<TOTAL-LIABILITIES>                          1,731,362
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    56,867,210
<SHARES-COMMON-STOCK>                        5,546,284
<SHARES-COMMON-PRIOR>                        5,460,908
<ACCUMULATED-NII-CURRENT>                    (191,129)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                   (10,335,412)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   (7,860,375)
<NET-ASSETS>                                37,964,399
<DIVIDEND-INCOME>                              339,125
<INTEREST-INCOME>                              292,931
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               1,207,432
<NET-INVESTMENT-INCOME>                      (575,376)
<REALIZED-GAINS-CURRENT>                   (9,101,223)
<APPREC-INCREASE-CURRENT>                  (9,193,959)
<NET-CHANGE-FROM-OPS>                     (18,295,182)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    (656,572)
<DISTRIBUTIONS-OF-GAINS>                   (3,712,483)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                     12,331,939
<NUMBER-OF-SHARES-REDEEMED>               (12,648,999)
<SHARES-REINVESTED>                            402,436
<NET-CHANGE-IN-ASSETS>                    (22,360,948)
<ACCUMULATED-NII-PRIOR>                      (567,810)
<ACCUMULATED-GAINS-PRIOR>                    3,502,118
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          408,911
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              1,207,432
<AVERAGE-NET-ASSETS>                        51,012,062
<PER-SHARE-NAV-BEGIN>                            11.14
<PER-SHARE-NII>                                  (.10)
<PER-SHARE-GAIN-APPREC>                         (3.35)
<PER-SHARE-DIVIDEND>                            (0.13)
<PER-SHARE-DISTRIBUTIONS>                       (0.71)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               6.85
<EXPENSE-RATIO>                                   2.36
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<SERIES>
   <NUMBER> 03
   <NAME> PRECIOUS METALS AND MINERALS CLASS C
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          OCT-31-1997
<PERIOD-END>                               OCT-31-1997
<INVESTMENTS-AT-COST>                       47,939,143
<INVESTMENTS-AT-VALUE>                      40,078,903
<RECEIVABLES>                                   73,789
<ASSETS-OTHER>                                  58,964
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              40,211,656
<PAYABLE-FOR-SECURITIES>                     1,676,995
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       54,367
<TOTAL-LIABILITIES>                          1,731,362
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    56,867,210
<SHARES-COMMON-STOCK>                           69,409
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                    (191,129)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                   (10,335,412)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   (7,860,375)
<NET-ASSETS>                                   474,996
<DIVIDEND-INCOME>                              339,125
<INTEREST-INCOME>                              292,931
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               1,207,432
<NET-INVESTMENT-INCOME>                      (575,376)
<REALIZED-GAINS-CURRENT>                   (9,101,223)
<APPREC-INCREASE-CURRENT>                  (9,193,959)
<NET-CHANGE-FROM-OPS>                     (18,295,182)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         95,151
<NUMBER-OF-SHARES-REDEEMED>                   (25,742)
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                    (22,360,948)
<ACCUMULATED-NII-PRIOR>                      (567,810)
<ACCUMULATED-GAINS-PRIOR>                    3,502,118
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          408,911
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              1,207,432
<AVERAGE-NET-ASSETS>                           364,251
<PER-SHARE-NAV-BEGIN>                             7.95
<PER-SHARE-NII>                                  (.02)
<PER-SHARE-GAIN-APPREC>                         (1.09)
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               6.84
<EXPENSE-RATIO>                                   2.37
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<SERIES>
   <NUMBER> 04
   <NAME> PRECIOUS METALS AND MINERALS
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          OCT-31-1997
<PERIOD-END>                               OCT-31-1997
<INVESTMENTS-AT-COST>                       47,939,143
<INVESTMENTS-AT-VALUE>                      40,078,903
<RECEIVABLES>                                   73,789
<ASSETS-OTHER>                                  58,964
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              40,211,656
<PAYABLE-FOR-SECURITIES>                     1,676,995
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       54,367
<TOTAL-LIABILITIES>                          1,731,362
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    56,867,210
<SHARES-COMMON-STOCK>                            1,259
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                    (191,129)
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                   (10,335,412)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                   (7,860,375)
<NET-ASSETS>                                     8,642
<DIVIDEND-INCOME>                              339,125
<INTEREST-INCOME>                              292,931
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               1,207,432
<NET-INVESTMENT-INCOME>                      (575,376)
<REALIZED-GAINS-CURRENT>                   (9,101,223)
<APPREC-INCREASE-CURRENT>                  (9,193,959)
<NET-CHANGE-FROM-OPS>                     (18,295,182)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                          1,259
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                    (22,360,948)
<ACCUMULATED-NII-PRIOR>                      (567,810)
<ACCUMULATED-GAINS-PRIOR>                    3,502,118
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          408,911
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              1,207,432
<AVERAGE-NET-ASSETS>                             9,942
<PER-SHARE-NAV-BEGIN>                             7.95
<PER-SHARE-NII>                                      0
<PER-SHARE-GAIN-APPREC>                         (1.09)
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               6.86
<EXPENSE-RATIO>                                   1.35
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<PAGE>
                               POWER OF ATTORNEY
 
    KNOW ALL MEN BY THESE PRESENTS, that WAYNE E. HEDIEN, whose signature
appears below, constitutes and appoints David M. Butowsky, Ronald Feiman and
Stuart Strauss, or any of them, his true and lawful attorneys-in-fact and
agents, with full power of substitution among himself and each of the persons
appointed herein, for him and in his name, place and stead, in any and all
capacities, to sign any amendments to any registration statement of ANY OF THE
DEAN WITTER FUNDS SET FORTH ON SCHEDULE A ATTACHED HERETO, and to file the same,
with all exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, as fully to all intents and purposes as he
might or could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents, or any of them, may lawfully do or cause to be
done by virtue hereof.
 
Dated: September 1, 1997
 
                                                   /s/ WAYNE E. HEDIEN
 
                                          --------------------------------------
                                                     Wayne E. Hedien

<PAGE>

                                   SCHEDULE A
 
<TABLE>
<C>        <S>
       1.  Active Assets Money Trust
       2.  Active Assets Tax-Free Trust
       3.  Active Assets Government Securities Trust
       4.  Active Assets California Tax-Free Trust
       5.  Dean Witter New York Municipal Money Market Trust
       6.  Dean Witter American Value Fund
       7.  Dean Witter Tax-Exempt Securities Trust
       8.  Dean Witter Tax-Free Daily Income Trust
       9.  Dean Witter Capital Growth Securities
      10.  Dean Witter U.S. Government Money Market Trust
      11.  Dean Witter Precious Metals and Minerals Trust
      12.  Dean Witter Developing Growth Securities Trust
      13.  Dean Witter World Wide Investment Trust
      14.  Dean Witter Value-Added Market Series
      15.  Dean Witter Utilities Fund
      16.  Dean Witter Strategist Fund
      17.  Dean Witter California Tax-Free Daily Income Trust
      18.  Dean Witter Convertible Securities Trust
      19.  Dean Witter Intermediate Income Securities
      20.  Dean Witter World Wide Income Trust
      21.  Dean Witter S&P 500 Index Fund
      22.  Dean Witter U.S. Government Securities Trust
      23.  Dean Witter Federal Securities Trust
      24.  Dean Witter Multi-State Municipal Series Trust
      25.  Dean Witter California Tax-Free Income Fund
      26.  Dean Witter New York Tax-Free Income Fund
      27.  Dean Witter Select Municipal Reinvestment Fund
      28.  Dean Witter Variable Investment Series
      29.  High Income Advantage Trust
      30.  High Income Advantage Trust II
      31.  High Income Advantage Trust III
      32.  InterCapital Insured Municipal Bond Trust
      33.  InterCapital Insured Municipal Trust
      34.  InterCapital Insured Municipal Income Trust
      35.  InterCapital Quality Municipal Investment Trust
      36.  InterCapital Quality Municipal Income Trust
      37.  Dean Witter Government Income Trust
      38.  Municipal Income Trust
      39.  Municipal Income Trust II
      40.  Municipal Income Trust III
      41.  Municipal Income Opportunities Trust
      42.  Municipal Income Opportunities Trust II
      43.  Municipal Income Opportunities Trust III
      44.  Municipal Premium Income Trust
      45.  Prime Income Trust
      46.  Dean Witter Short-Term U.S. Treasury Trust
      47.  Dean Witter Diversified Income Trust
      48.  InterCapital California Insured Municipal Income Trust
      49.  Dean Witter Health Sciences Trust
      50.  Dean Witter Global Dividend Growth Securities
      51.  InterCapital Quality Municipal Securities
</TABLE>
 
<PAGE>

<TABLE>
<C>        <S>
      52.  InterCapital California Quality Municipal Securities
      53.  InterCapital New York Quality Municipal Securities
      54.  Dean Witter Retirement Series
      55.  Dean Witter Limited Term Municipal Trust
      56.  Dean Witter Short-Term Bond Fund
      57.  Dean Witter Global Utilities Fund
      58.  InterCapital Insured Municipal Securities
      59.  InterCapital Insured California Municipal Securities
      60.  Dean Witter High Income Securities
      61.  Dean Witter National Municipal Trust
      62.  Dean Witter International SmallCap Fund
      63.  Dean Witter Mid-Cap Growth Fund
      64.  Dean Witter Select Dimensions Investment Series
      65.  Dean Witter Global Asset Allocation Fund
      66.  Dean Witter Balanced Growth Fund
      67.  Dean Witter Balanced Income Fund
      68.  Dean Witter Intermediate Term U.S. Treasury Trust
      69.  Dean Witter Hawaii Municipal Trust
      70.  Dean Witter Japan Fund
      71.  Dean Witter Capital Appreciation Fund
      72.  Dean Witter Information Fund
      73.  Dean Witter Fund of Funds
      74.  Dean Witter Special Value Fund
      75.  Dean Witter Income Builder Fund
      76.  Dean Witter Financial Services Trust
      77.  Dean Witter Market Leader Trust
      78.  Dean Witter Managers' Select Fund
      79.  Dean Witter Liquid Asset Fund Inc.
      80.  Dean Witter Natural Resource Development Securities Inc.
      81.  Dean Witter Dividend Growth Securities Inc.
      82.  Dean Witter European Growth Fund Inc.
      83.  Dean Witter Pacific Growth Fund Inc.
      84.  Dean Witter High Yield Securities Inc.
      85.  Dean Witter Global Short-Term Income Fund Inc.
      86.  InterCapital Income Securities Inc.
</TABLE>


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